Miniproposals

Miniproposal: 675 Date Filed: 11/11/2011 Title: Initial disruption mitigation experiments with two gas jets First Author: Geoff Olynyk Session Leader: Geoff Olynyk (shots 1-27)

Engineering Operator Run Comment

MP 675 - "Initial disruption mitigation experiments with two gas jets SL

Session Leader Plans

Entered: Jun 21 2012 04:15:48:213PM

Author: Geoff Olynyk

Session leader plan for run 1120622 (Friday, June 22, 2012) MP 675 - "Initial disruption mitigation experiments with two gas jets", run 2 of 3. G.M. Olynyk Objectives: (a) Re-commission disruption mitigation gas jets after rehabilitation of the power supply; (b) Perform a scan of gas jet stagger time to test the effect of one vs. two gas jets on mitigated disruption figures of merit; (c) Perform a scan of safety factor (q) to study the effect of this important MHD parameter on radiation asymmetry in mitigated disruptions; (d) In all phases, monitor the deposited heat load in the divertor using IR thermography, to determine the effectiveness of disruption mitigation (with one and two gas jets) on reducing divertor heat loads; (e) Use divertor Langmuir probes to study the halo currents during umitigated and mitigated disruptions. Gas request: D2 majority fuelling. Load Ar into B-side lower gas puff in order to get core rotation from HiReX Jr. Diagnostics & systems requested: Fast magnetics – at least the low-n coils on stalks. [T. Golfinopoulos] Two-color interferometer (TCI) [J. Irby] ICRF – 1 MW, from E-port 2-strap antenna (transmitter #2) [S.J. Wukitch, Y. Lin] X-ray tomography – at least array 3 [R.S. Granetz, I. Faust] Core CXRS – impurity temperature and rotation [I. Bespamyatnov] Foil bolometry [M.L. Reinke] AXUV diode arrays AXA, AXJ with gains turned down for disruption mitigation [M.L. Reinke] Disruption mitigation gas jets [R.S. Granetz] Fast AXUV diode toroidal array (DMBolo) [G.M. Olynyk] FRCECE – For fast radial profiles of electron temperature [P. Phillips, U. Texas] Divertor thermocouples [D. Brunner] IR imaging – To get divertor heat loads [J. Terry] Core rotation from HiReX Jr [J. Rice, Y. Podpaly] Core Thomson temperature and density, with custom timing for disruptions [J. Walk, J. Hughes] Important note for diagnosticians: After disruption mitigation gas jets are fired, torus pressures can rise as high as 1 torr. If you have sensitive diagnostics, these should have their protective gate valves closed. PhysOp instructions: After the gas tests, we will be running identical, steady target plasmas for the first half of the run day, with the variation coming from the gas jet system. Requested plasma parameters are as follows: Target plasma 1120202020 Ip 1.0 MA Btor 5.6 T nl04 1.0e20 m-2 The second half of the run will consist of a q-scan, with parameters the same except with Ip = 600 kA, 800 kA, and 1.2 MA. Other instructions (Session Leader, auxiliary systems, diagnostic setup, etc.): Session Leader to announce that the (induced) disruptions will be at 0.700 s today (not the normal 1.000 s for mitigated disruption runs) ICRF request: 1 MW on E-antenna (transmitter #2), turning on at t=0.600 s, remaining on until (induced) disruption at t=0.700 s Diagnostic neutral beam (DNB) to be shut off and locked out. This is for the protection of the DNB, but also helps with DMBolo noise. Load disruption mitigation gas jet plenums with mixture of 85% He, 15% Ar for both of B-port (old) and F-port (new) gas jets. Core Thomson scattering should be pulsed so the two lasers fire 0.5 ms apart. Timing to be given to Thomson operator before each shot. Session Leader to remind Thomson operator to re-arm the laser after every shot since it automatically disabled after the gate valves close. Run plan: 1. Gas tests (no plasma) for calibration of B-jet.Intention is to do this before the 9:00 am start of run. Fire OLD jet (B-jet) into torus with no plasma, in order to calibrate the timing and amount of gas coming from the OLD gas jet so that we can properly time the two-jet shots later today. Vacuum systems engineer to keep torus gate valve closed for 30 seconds after shot to get a clear reading of torus pressure (in mtorr). (4 no-plasma shots) 2. Single gas jet operation. Following PhysOp instructions above, trigger mitigated disruptions at t=0.700 s using F-jet alone, and B-jet alone. Use these shots as a baseline for single-jet operation, and also to verify jet timing for subsequent stagger time scan. (2 shots) 3. Gas jet stagger time scan. Fire both jets, with stagger times of -1.0, -0.6, -0.25, +0.25, +0.6, +1.0 ms, 0.0 ms. Stagger time is defined as F-jet trigger time minus B-jet trigger time, corrected for the relative valve delays, so that negative times means F-jet fires first and stagger time = 0.0 means the two gas jets' fronts hit the plasma at the same time. Note that we do the delta_T = 0.0 shot last, so that we have a comparison between the double-jet mitigated shot and the unmitigated shot (next step). This saves the number of times that the divertor Langmuir probes need to be reconfigured. (7 shots) 4. Unmitigated disruptions. Trigger VDE at t=0.700 s to get a baseline unmitigated disruption. Repeat if necessary. (1-2 shots, plus 1-2 post-disruption fizzles to recover) 5. q-scan. Trigger mitigated disruptions at t=0.700 s with F-port gas jet alone and both gas jets at the same time (delta_T = 0) at 5.6 T with currents of 600 kA, 800 kA, and 1.2 MA. Adjust density to maintain fixed T_e. (6 shots) 6. Extended q-scan. Repeat q-scan (Ip 600 kA, 800 kA, 1.2 MA) with B-jet alone and with both gas jets with delta_T = +/- 0.5 ms (9 shots) Total: 4 no-plasma gas tests; 25 plasma shots planned; do not anticipate getting through this entire list.

Physics Operators Plans

Entered: Jun 21 2012 05:19:04:730PM

Author: Ron Parker

-------------------------------- Engineering Setup for 1120622 -------------------------------- SL: Olynyk PO: Parker Run begins at 09:00 and ends at 17:00 Note: Gas pulse tests beginning at 08:00 if engineering support available Power systems as on: 1120621025 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1.5 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) leave H-Bottom as is hybrid DISABLED (PG5) Leave NINJA as is, DISABLED ***Enable gate-valves and shutters: VUV, Xeus/LoWEUS ONLY*** NOTE WELL!!!! Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): YES ICRF(yes/no): yes, E-port LH(yes/no): No Cryopump (yes/no): no DNB (yes/no): No CaF2 Injector: No Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Jun 22 2012 05:45:06:300PM

Author: Geoff Olynyk

Session leader summary for run 1120622 Friday, June 22, 2012 MP 675 - "Initial disruption mitigation experiments with two gas jets" (Run 2 of 3) G.M. Olynyk Today's mitigated disruptions were, like previous runs, extremely successful. There were no post-disruption fizzles after mitigated disruptions. However, we lost several shots due to fizzles after the unmitigated disruptions and thus were not able to complete the entire run plan. We were able to get through parts 1–4 of the SL_PLAN but did not perform the q-scan planned for parts 5–6. The day was started off with a series of four no-plasma calibration shots for the B-port gas jet. One of them (shot 004) was not successful due to the the fizzle-detector interlock not letting the B-jet fire. We disabled the fizzle detector for shot 005 and finished our calibration. Plasma operation started with single-gas-jet mitigated disruptions at 0.700 s. The target plasma was a lower-single-null L-mode with 1 MW of auxiliary (ICRF) heating from the E-port 2-strap antenna. Shot 006 terminated early due to molybdenum influx at 0.65 s. We fired the B-jet successfully into plasma on shot 007. The F-jet was fired on shot 008 but only let a small amount of gas through, so we repeated the F-only mitigated disruption (increasing the pulse length from 2.25 ms to 2.5 ms on the F-jet) for shot 009. We then completed a scan of 'gas jet stagger time', varying the time between when the gas jets hit the plasma. This was completed using shots 010 (successful), 011 (successful), 012 (successful), 013 (successful), 014 (successful), 015 (runaway shutdown), 016 (runaway shutdown followed by data system problems), 017 (successful), and 018 (successful). This last shot (018) had the F-jet firing 1.06 ms before the B-jet in an attempt to make their gas arrive at the plasma at the same time, in order to provide a two-jet comparison for the divertor thermography and halo current measurements in the next phase. The run then moved on to part 4 of the SL_PLAN, which was unmitigated disruptions (forced VDEs at 0.700 s) beginning with shot 019. The plasma was successfully disrupted on shot 019, and then shot 020 was post-disruption recovery (less charitably: post-disruption fizzle). Due to some data acquisition bugs on the divertor IR thermography, we decided to repeat the unmitigated VDE on shot 021, which proved to be our downfall for the rest of the run. Shot 021 was a successful unmitigated VDE, but shots 022–027 were fizzles, so we never got to parts 5 or 6 of the plan (the q-scan). On the plus side, the DMBolo system—aside from (dead) diode #5—took data all day successfully. I now have two complete run days of good radiation asymmetry data with one and two gas jets (and now, unmitigated VDEs) to analyze for my thesis work. Read on for a list of lessons learned from today, and a brief summary of each plasma discharge! Lessons learned: - Relative timing of gas jets to get same gas front arrival: for 57 bar plenum pressure, you want to trigger the F-port gas jet about 1.06 ms before the B-port gas jet (in February, we concluded that it was about 1.25 ms required). This seems to be reproducible to within about 0.1 ms. - Gas jets seem to be affected by runaway shutdowns (rapid change in poloidal field?) On the two runaway shutdowns we had today (015, 016), the F-jet stayed open for nearly 20 ms, injecting a lot of gas into the torus. - Shot 016 had the gas jet firing into an approximately 100 kA runaway discharge, causing the runaways to become deconfined, as could be seen on the He-3 [photo]neutron signal. An interesting test of the gas jet effect on MHD causing deconfinement of the runaways! - Gas jet duration to get same injected amount: this was figured from the torus pressure change when firing one gas jet or the other. For 57 bar plenum pressure, you want to use a duration of about 1.41 ms on the B-jet and 2.5 ms on the F-jet to put about 175 mtorr of pressure (700 torr-l) from each jet. - The calibration for the B-jet seems to be okay whether we have magnetic field or not, but the calibration we did on Monday (run 1120618) for the F-jet doesn't seem to hold during plasma operations. - Single-gas-jet mitigated disruptions don't really lead to a long delay (inter-shot time is about what it normally is, maybe a couple minutes longer) but as before, when we fire both gas jets and raise the torus pressure to 350+ mtorr, it takes a long time to pump down, raising the inter-shot time to about 15 minutes. On a couple of shots today (015, 016), when we raised torus pressure to over 800 mtorr, it took almost 20 minutes to pump down. - Today provides further confirmation that mitigated disruption shots do NOT lead to fizzles on the next shot. Unmitigated VDEs, on the other hand, very much do cause fizzles on subsequent shots. "Scorecard": Successful no-plasma shots (gas jet tests): 4 (001, 002, 003, 005) Unsuccessful no-plasma shots: 1 (004) Successful disruption shots (MGI or intentional unmitigated VDE): 11 (007, 009, 010, 011, 012, 013, 014, 017, 018, 019, 021) Unsuccessful shots (fizzles, MGI faults, runaway shutdowns, unintentional disruptions): 11 (006, 008, 015, 016, 020, 022, 023, 024, 025, 026, 027) 27 shots total Shot summaries 001 No plasma. Calibration shot for B-port gas jet. Fired successfully. 002 No plasma. Calibration shot for B-port gas jet. Fired successfully. 003 No plasma. Calibration shot for B-port gas jet. Fired successfully. 004 No plasma. Calibration shot for B-port gas jet. Gas jet failed to fire due to fizzle-detector interlock box. 005 No plasma. Calibration shot for B-port gas jet. Fired successfully. 006 Unplanned disruption due to molybdenum injection. 007 Successful single-jet MGI using B-jet. 008 MGI system (F-jet) fired but didn't let much gas through. 009 Successful single-jet MGI using F-jet. 010 Successful two-jet MGI. Stagger time -1.00 ms. (F before B.) 011 Successful two-jet MGI. Stagger time -0.60 ms. (F before B.) 012 Successful two-jet MGI. Stagger time -0.25 ms. (F before B.) 013 Successful two-jet MGI. Stagger time +0.25 ms. (F after B.) 014 Successful two-jet MGI. Stagger time +0.60 ms. (F after B.) 015 Early runaway shutdown. MGI system fired anyway. 016 Early runaway shutdown. MGI system fired anyway. (this might be a good thing as it might tell us something interesting about runaway confinment during MGI!) 017 Successful two-jet MGI. Stagger time +1.00 ms. (F after B.) 018 Successful two-jet MGI. Stagger time 0.00 ms. (F and B simultaneous.) 019 Successful (intentional) unmitigated VDE. 020 Fizzle. This was expected after the unmitigated VDE. 021 Successful (intentional) unmitigated VDE. 022 Fizzle. 023 Fizzle. 024 Fizzle. 025 Fizzle. 026 Fizzle. 027 Fizzle.

Physics Operator Summaries

Entered: Jun 22 2012 05:33:26:413PM

Author: Ron Parker

The run started off with an unforced disruption on the first shot.The next 13 shots also disrupted, but they were forced to do so by gas injection at 0.7 s.,which also mitigated the disruption effects. Shots 15 and 16 were shutdown by runaways, so beginning with shot 17 the runaways were brought under control by adding a little more gas at commutation with PG3. Shots 17 and 18 were gas-pulse forced but again mitigated disruptions. Then shot 19 was forced to disrupt by an intentional VDE (this time unmitgated by a gas pulse).This was followed by a fizzle. Shot 21 was another forced disruption also unmitigated by a gas pulse, and this was then followed by 6 fizzles in a row! Neither tuning of prefill nor EF4 current seemed to help burn through the fizzles. Apparently the intentionally induced VDE on shot 21 stirred up enough impurities tp prevent a proper burnout for the next 6 shots. Unfortunately this brought us to the end of the run. Hopefully an overnight ECDC cleaning will restore the machine to better startup conditions Scorecard: 27 plasma attempts, 7 fizzles, one unforced and unmitigated disuption, 2 forced and unmitigated disruptions and 17 forced and mitigated disruptions.

Session Leader Comments
Jun 22 2012 08:29:11:913AM	1120622001	Geoff Olynyk	This is a note to everybody that we will be initiating disruptions with the gas jet (and twice by triggering an unmitigated VDE) at t = 0.700 s today. Not at the previously-used time (1.000 s).
Jun 22 2012 08:59:48:110AM	1120622001	Geoff Olynyk	Run 1120622, shot #001 Description: Shot 1 will be a no-plasma test of the OLD fast gas jet (at B-port), in order to calibrate its timing and throughput. Gas jet system: Fire B-jet only, with pulse duration 1.28 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 1.0000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.28 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 56-57 bar B-jet plenum, after shot: 52 F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 158.4 mtorr
Jun 22 2012 09:15:49:170AM	1120622002	Geoff Olynyk	Run 1120622, shot #002 Description: Shot 2 will be another no-plasma test of the OLD fast gas jet (at B-port), in order to calibrate its timing and throughput. Gas jet system: Fire B-jet only, with pulse duration 2.00 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 1.0000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 2.00 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 56-57 bar B-jet plenum, after shot: 48 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 364.6 mtorr
Jun 22 2012 09:36:04:643AM	1120622003	Geoff Olynyk	Run 1120622, shot #003 Description: Shot 3 will be third no-plasma test of the OLD fast gas jet (at B-port), in order to calibrate its timing and throughput. Gas jet system: Fire B-jet only, with pulse duration 1.55 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 1.0000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.55 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 49-50 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 305.2 mtorr B-bottom MKS gauge, after shot: 439 mtorr Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact.
Jun 22 2012 09:56:07:377AM	1120622004	Geoff Olynyk	Run 1120622, shot #004 Description: Shot 4 will be the fourth and last no-plasma test of the OLD fast gas jet (at B-port), in order to calibrate its timing and throughput. Gas jet system: Fire B-jet only, with pulse duration 1.41 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 1.0000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: (didn't fire) F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: (jet didn't fire) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: (jet didn't fire)
Jun 22 2012 10:07:05:250AM	1120622005	Geoff Olynyk	Run 1120622, shot #005 Description: Shot 5 will be a repeat of shot 4, but we have disabled the fizzle detector so that the gas jet actually fires. It is a test of the OLD fast gas jet (at B-port), in order to calibrate its timing and throughput. Gas jet system: Fire B-jet only, with pulse duration 1.41 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 1.0000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 51 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 245.7 mtorr Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 348 mtorr
Jun 22 2012 10:27:03:213AM	1120622006	Geoff Olynyk	Run 1120622, shot #006 Description: Shot 6 will have plasma. Moving onto step 2 of SL_PLAN. Fire B-jet only, at t=0.700 s. Thomson to fire at 0.7041 and 0.7046 s if it works properly. I'm told we will not have divertor IR thermography on this shot. Gas jet system: Fire B-jet only, with pulse duration 1.41 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.7000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 51 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: (gate valve wasn't closed) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: (gate valve wasn't closed)
Jun 22 2012 10:31:58:970AM	1120622006	Geoff Olynyk	Result: Unmitigated disruption due to (Mo?) injection at 0.653 seconds. We fired the gas jets 47 ms too late!
Jun 22 2012 10:47:27:230AM	1120622007	Geoff Olynyk	Run 1120622, shot #007 Description: Shot 7: Repeat shot 6 but without unplanned disruption. Fire B-jet only, at t=0.700 s. Thomson to fire at 0.7041 and 0.7046 s if it works properly. We do have divertor IR thermography on this shot. Gas jet system: Fire B-jet only, with pulse duration 1.41 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.7000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 51 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 251.1 mtorr Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 352 mtorr
Jun 22 2012 11:02:48:143AM	1120622008	Geoff Olynyk	Run 1120622, shot #008 Description: Shot 8: Fire F-jet only, at t=0.700 s. Thomson to fire at 0.7041 and 0.7046 s. Gas jet system: Fire F-jet only, with pulse duration 2.25 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' OFF (to SHUTTER power supply) 'F-jet' 0.7000 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' OFF (connected to SHUTTER power supply) 'F-jet' 2.25 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: N/A B-jet plenum, after shot: N/A F-jet plenum, before shot: 57 bar F-jet plenum, after shot: (not much drop) Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 26.9 mtorr Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 37 mtorr
Jun 22 2012 11:16:40:430AM	1120622008	Geoff Olynyk	F-jet didn't really open on that one. Only let a little bit of gas through. Next shot we'll up the pulse duration to 2.5 ms (from 2.25 ms). On shot 8: Trigger F-jet at 0.700 s (duration 1.41 ms) See start of rise on DMBolo plasma emissivity at 0.70533 s. Gas delay for F-jet: 5.33 ms Delta_t_0 = 1.32 ms (fire F-jet 1.32 ms earlier than B-jet) as indicated by this shot. We'll get better data on the next one hopefully.
Jun 22 2012 11:08:03:347AM	1120622009	Geoff Olynyk	Run 1120622, shot #009 Description: Shot 9: Fire F-jet only, at t=0.700 s. Thomson to fire at 0.7041 and 0.7046 s. Gas jet system: Fire F-jet only, with pulse duration 2.50 ms. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' OFF (to SHUTTER power supply) 'F-jet' 0.7000 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' OFF (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: N/A B-jet plenum, after shot: N/A F-jet plenum, before shot: 57 bar F-jet plenum, after shot: approx. 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 209.2 Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 301 mtorr
Jun 22 2012 11:17:29:627AM	1120622009	Geoff Olynyk	Pulse duration 2.5 ms on F-jet gives good gas flow-through. On shot 9: Trigger F-jet at 0.700 s (duration 1.41 ms) See start of rise on DMBolo plasma emissivity at 0.70507 s. Gas delay for F-jet: 5.07 ms Delta_t_0 = 1.06 ms (fire F-jet 1.06 ms earlier than B-jet) as indicated by this shot. Use this as the true delay.
Jun 22 2012 11:32:50:423AM	1120622010	Geoff Olynyk	Run 1120622, shot #010 Description: Shot 10: Move to step 3 of SL_PLAN. Firing both gas jets near t=0.700 s with F-jet timed to arrive at plasma 1 ms before B-jet. Thomson scattering pulses at 0.7031 and 0.7036 s. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 1 ms before B-jet. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69794 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 51-52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: (can't really read – too noisy) Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 470.7 mtorr Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 688 mtorr
Jun 22 2012 11:55:45:933AM	1120622011	Geoff Olynyk	Run 1120622, shot #011 Description: Shot 11: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 0.6 ms before B-jet (delta T = -0.6 ms). Thomson to fire at 0.7035 and 0.7040 s. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 0.6 ms before B-jet. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69834 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: 52 bar (very approximate) Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 470.7 Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 690 mtorr
Jun 22 2012 12:17:30:223PM	1120622012	Geoff Olynyk	Run 1120622, shot #012 Description: Shot 12: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 0.25 ms before B-jet (delta T = -0.25 ms). Thomson to fire at 0.7038 and 0.7043 s. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 0.25 ms before B-jet. F-jet advance 1.06 ms for delta T=0 means that we want total F-jet advance of 1.31 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69869 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently 'NEW' valve/transducer) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'OLD' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: approx. 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 451.1 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: Went beserk on this shot. No data
Jun 22 2012 12:39:45:227PM	1120622013	Geoff Olynyk	Run 1120622, shot #013 Description: Shot 13: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 0.25 ms LATER than B-jet (delta T = +0.25 ms). Thomson to fire at 0.7041 and 0.7044 s. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 0.25 ms after B-jet. F-jet advance 1.06 ms for delta T=0 means that we want total F-jet advance of 0.81 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69919 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: As with previous shots. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: approx. 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 440.8 Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 648
Jun 22 2012 01:03:15:407PM	1120622014	Geoff Olynyk	Run 1120622, shot #014 Description: Shot 14: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 0.600 ms LATER than B-jet (delta T = +0.600 ms). Thomson to fire at 0.7044 and 0.7048 s. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 0.600 ms after B-jet. F-jet advance 1.060 ms for delta T=0 means that we want total F-jet advance of 0.460 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69954 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: OLD valve on B-port NEW valve on F-port OLD valve (on B-port) driven by SHUTTER power supply NEW valve (on F-port) driven by PROPELLANT power supply. Digitization setup: As with previous shots. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 463.1 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 682 mtorr
Jun 22 2012 01:33:34:120PM	1120622015	Geoff Olynyk	Run 1120622, shot #015 Description: Shot 15: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 1.00 ms LATER than B-jet (delta T = +1.000 ms). Thomson pulses requested at 0.7038 and 0.7042 s. Result: Runaway startup and early (non-mitigated) disruption at 0.3242 s. Next shot - repeat this one Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 1.00 ms after B-jet. F-jet advance 1.060 ms for delta T=0 means that we want total F-jet advance of 0.060 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69994 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots. Digitization setup: As with previous shots. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: approx. 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 509 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 765 mtorr Note that gate valves were not closed before pulse on that one, so after-shot pressures indicated above are lower bound.
Jun 22 2012 02:20:14:300PM	1120622016	Geoff Olynyk	Run 1120622, shot #016 Description: Shot 16: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 1.00 ms LATER than B-jet (delta T = +1.000 ms). Thomson pulses requested at 0.7038 and 0.7042 s. Repeat of shot 015 which failed due to runaway startup. Result: Another runaway shutdown. Gas jets fired into 100 kA runaway plasma at 0.700 s. Interesting deconfinement of runaways due to gas jet! Next shot: Repeat of shot 015 but without runaways. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 1.00 ms after B-jet. F-jet advance 1.060 ms for delta T=0 means that we want total F-jet advance of 0.060 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69994 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: approx. 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 798 mtorr Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 984 mtorr
Jun 22 2012 02:21:01:577PM	1120622017	Geoff Olynyk	Run 1120622, Shot #017 Description: Shot 17: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma 1.00 ms LATER than B-jet (delta T = +1.000 ms). Thomson pulses requested at 0.7038 and 0.7042 s. Repeat of shot 015 which failed due to runaway startup. Result: Good gas jet mitigated disruption. Torus pressure rise was what we expected. Next shot: Make gas jets hit plasma at the same time. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma 1.00 ms after B-jet. F-jet advance 1.060 ms for delta T=0 means that we want total F-jet advance of 0.060 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69994 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: Approx 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 437.2 Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 640 mtorr
Aug 2 2012 03:47:41:867PM	1120622018	Geoff Olynyk	Run 1120622, Shot #018 Description: Shot 18: Continue step 3 of SL_PLAN. Fire both gas jets near t=0.700 s with timing such that F-jet arrives at plasma at the same time as B-jet (delta T = 0). Thomson pulses requested at 0.7038 and 0.7042 s. Result: Good mitigated disruption. Next shot: Unmitigated disruption. Induce a VDE at t=0.700 s. Gas jet system: Fire both gas jets with F-jet timed to arrive at plasma at same time as B-jet (delta_T = 0.000 ms). F-jet advance 1.060 ms for delta T=0 means that we want total F-jet advance of 1.060 ms. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' 0.69894 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' 2.50 ms (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: 57 bar F-jet plenum, after shot: Approx. 52 bar Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 451.9 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 650 mtorr
Jun 22 2012 03:13:49:727PM	1120622019	Geoff Olynyk	Run 1120622, Shot #019 Description: Shot 19: Move on to step 4 of SL_PLAN. Unmitigated VDE at t=0.700 s. Thomson pulses requested at 0.700 and 0.701 s. Divertor IR thermography enabled. Gas jet system: Disabled. Result: Gas jets did not fire. We disrupted successfully at t=0.7098 s due to VDE. Next shot: Change Thomson timing to 0.7093 and 0.7097 s. Repeat unmitigated VDE to get more divertor IR thermography data.
Jun 22 2012 03:19:48:593PM	1120622020	Geoff Olynyk	Run 1120622, Shot #020 Description: Shot 20: Unmitigated VDE at t=0.700 s. Divertor IR thermography enabled. Gas jet system: Disabled. Result: Fizzle. Note that we don't have these post-disruption fizzles on the mitigated disruptions! (Should put this in the paper: Compare post-disruption plasma reliability for mitigated and unmitigated disruptions.) Next shot: Repeat.
Jun 22 2012 03:33:05:400PM	1120622021	Geoff Olynyk	Run 1120622, Shot #021 Plan: Unmitigated VDE at t=0.700 s. Divertor IR thermography enabled. Request Thomson scattering pulses at 0.7093 and 0.7097 s. Gas jet system: Disabled. Result: Good unmitigated VDE at t=0.700 s. See that divertor glow afterwards! Unlike the mitigated disruptions. Next shot: Move to step 5 of SL_PLAN. Fire B-jet only into 800 kA plasma.
Jun 22 2012 03:47:10:987PM	1120622022	Geoff Olynyk	Run 1120622, Shot #022 Description: Shot 22: Move to step 5 of SL_PLAN (q-scan). Fire B-jet only at t=0.700 s. Thomson pulses requested at 0.7038 and 0.7042 s. Result: Fizzle. Next shot: Repeat. Gas jet system setup: Fire B-jet only. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 245.7 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 351 mtorr
Jun 22 2012 04:03:44:967PM	1120622023	Geoff Olynyk	Run 1120622, Shot #023 Description: Shot 23: Step 5 of SL_PLAN (q-scan), at 800 kA. Fire B-jet only at t=0.700 s. Thomson pulses requested at 0.7038 and 0.7042 s. Result: Fizzle. No more of these unmitigated disruptions followed by fizzles please. Next shot: Try again. Cell access after the next shot (24). Gas jet system setup: Fire B-jet only. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 256.6 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: 370 mtorr.
Jun 22 2012 04:20:41:807PM	1120622024	Geoff Olynyk	Run 1120622, Shot #024 Description: Shot 24: Step 5 of SL_PLAN (q-scan), at 800 kA. Fire B-jet only at t=0.700 s. Thomson pulses requested at 0.7038 and 0.7042 s. Result: Fizzle Next shot: PhysOp will check startup and we will retry. Gas jet system setup: Fire B-jet only. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: approx. 52 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: about 256 (thermocouple gauge) - gate valves didn't close Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact.
Jun 22 2012 04:36:45:930PM	1120622025	Geoff Olynyk	Run 1120622, Shot #025 Description: Shot 25: Step 5 of SL_PLAN (q-scan), at 800 kA. Fire B-jet only at t=0.700 s. Thomson pulses requested at 0.7038 and 0.7042 s. Result: Fizzle. Are these really post-disruption fizzles at this point? Or is it something else? Next shot: PhysOp is changing things and we will try again. Gas jet system setup: Fire B-jet only. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: Gas jet didn't fire F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: Gas jet didn't fire (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact. B-bottom MKS gauge, after shot: Gas jet didn't fire
Jun 22 2012 04:51:53:353PM	1120622026	Geoff Olynyk	Run 1120622, Shot #026 Description: Shot 26: Attempt number five at firing B-jet only into 800 kA plasma. Result: Fizzle number five. Next shot: PhysOp will adjust some settings and we will try again. Shot 27 will be the last shot for today. Gas jet system setup: Fire B-jet only. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: 52 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 253.8 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact.
Jun 22 2012 05:06:30:623PM	1120622027	Geoff Olynyk	Run 1120622, Shot #027 Description: Shot 27: Attempt number six at firing B-jet only into 800 kA plasma. Result: Fizzle. That's six in a row. ECCD over the weekend hopefully will make next Tuesday's run better. Next shot: Have a good weekend, everybody! Gas jet system setup: Fire B-jet only. Timing and duration below. Gas mixture 15% Ar / 85% He. See section at bottom for pressures. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current; see below for more details): 'B-jet' 0.70000 s (to SHUTTER power supply) 'F-jet' OFF (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): 'B-jet' 1.41 ms (connected to SHUTTER power supply) 'F-jet' OFF (connected to PROPELLANT power supply) Power supply and valve configuration: As with previous shots today. Digitization setup: As with previous shots today. Pressure readings before/after: B-jet plenum, before shot: 57 bar B-jet plenum, after shot: approx. 52 bar F-jet plenum, before shot: N/A F-jet plenum, after shot: N/A Note: The plenum pressures listed above are very inaccurate, perhaps +/- a few bar. Torus pressure, before shot: (effectively zero) Torus pressure, after shot: 253.8 mtorr (thermocouple gauge) Note: The torus pressure readings are made with a thermocouple gauge calibrated with nitrogen. Since we're firing helium-argon mixture, it will not be exact.

Physics Operator Comments
Jun 22 2012 09:02:46:550AM	1120622001	Ron Parker	Starting off with tests of the gas injection system.
Jun 22 2012 10:25:56:203AM	1120622006	Ron Parker	First plasma shot, shot 6, disrupted before the gas puff due to impurity injection.
Jun 22 2012 10:40:30:473AM	1120622007	Ron Parker	Shot 7 disrupted due to gas injection, first "data shot" of the day
Jun 22 2012 10:53:54:557AM	1120622008	Ron Parker	Shot 8 disrupted due to gas injection, as expected.
Jun 22 2012 11:07:11:107AM	1120622009	Ron Parker	Shot 9 was a nice disruption, as programmed
Jun 22 2012 11:48:52:640AM	1120622010	Ron Parker	Shot 10 was good, disruption as programmed
Jun 22 2012 12:11:00:553PM	1120622011	Ron Parker	Shot 11 was good, disruption as programmed.
Jun 22 2012 12:14:27:783PM	1120622012	Ron Parker	Shot 12 was good, disruption as programmed.
Jun 22 2012 12:44:35:587PM	1120622013	Ron Parker	Shot 13 was good, disruption as programmed.
Jun 22 2012 01:03:00:880PM	1120622014	Ron Parker	Shot 14 was good, disruption as programmed.
Jun 22 2012 02:04:30:833PM	1120622015	Ron Parker	Shot 15 was bad, early disruption before programmed disruption. Also, runaway shutdown -- thanks Matt
Jun 22 2012 02:12:27:287PM	1120622016	Ron Parker	Shot 16 was bad, early disruption before programmed disruption. Also, runaway shutdown again, Thanks, Matt
Jun 22 2012 02:21:35:160PM	1120622017	Ron Parker	Shot 17 was OK, not a very good startup, but it survived until forced disruption.
Jun 22 2012 02:43:45:353PM	1120622018	Ron Parker	Shot 18 was OK, shutdown by forced disruption
Jun 22 2012 03:10:39:557PM	1120622019	Ron Parker	Shot 19 was OK, shutdown by unmitigated but forced disruption
Jun 22 2012 03:18:36:307PM	1120622020	Ron Parker	Fizzle!
Jun 22 2012 03:32:18:547PM	1120622021	Ron Parker	No Fizzle! Another unmitigated forced disruption
Jun 22 2012 04:15:00:087PM	1120622022	Ron Parker	Fizzle
Jun 22 2012 04:15:12:863PM	1120622023	Ron Parker	Fizzle
Jun 22 2012 04:22:34:450PM	1120622024	Ron Parker	Fizzle. Gas fill pressure may be too low -- add 3ms to fill pulse
Jun 22 2012 04:43:24:543PM	1120622025	Ron Parker	Fizzle. Maybe Bz too high? Decrease EF4 current by 10 A
Jun 22 2012 04:48:55:323PM	1120622026	Ron Parker	Fizzle

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:56:20:720AM	Test	Ok	Gas Jet
2	09:12:16:593AM	Test	Ok	Gas Jet
3	09:32:22:410AM	Test	Ok	Gas Jet
4	09:50:29:833AM	Test	Bad	Gas jet failed to puff
5	10:00:05:540AM	Test	Ok	Gas Jet
6	10:19:26:287AM	Plasma	Ok
7	10:33:39:700AM	Plasma	Ok
8	10:49:30:443AM	Plasma	Ok
9	11:03:10:080AM	Plasma	Ok
10	11:28:39:677AM	Plasma	Ok
11	11:50:24:897AM	Plasma	Ok
12	12:11:43:437PM	Plasma	Ok
13	12:36:08:373PM	Plasma	Ok
14	12:57:31:010PM	Plasma	Ok
15	01:18:49:290PM	Plasma	Ok
16	01:44:12:183PM	Plasma	Ok
17	02:11:50:020PM	Plasma	Ok
18	02:35:10:380PM	Plasma	Ok
19	03:01:35:973PM	Plasma	Ok
20	03:15:00:977PM	Plasma	Ok
21	03:28:06:510PM	Plasma	Ok
22	03:41:48:160PM	Plasma	Ok
23	03:56:02:810PM	Plasma	Ok
24	04:14:25:753PM	Plasma	Ok
25	04:32:00:087PM	Plasma	Ok
26	04:45:23:310PM	Plasma	Ok
27	05:01:51:540PM	Plasma	Ok

System Availability

Jun 22 2012 08:55:56:193AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 2 2008 11:03:58:433AM (sears) Joe Snipes Active MHD Antenna golfit BES yes BES system is online Nov 22 2011 02:21:12:050PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes Midplane diodes functioning properly. Midplane bolometers working and calibrated. DIV bolometers installed but not yet toaster calibrated Apr 20 2012 09:57:29:520AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Jun 15 2012 05:02:46:313PM (dekow) Jim Irby Boronization dekow,irby CECE no   Jan 6 2012 03:48:47:060PM  Anne White Correlation ECE whitea CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01:59:693PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes   Jun 15 2012 05:02:31:550PM (dekow) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard CXRS yes core-CXRS system is online Nov 22 2011 02:21:22:280PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan CXRS edge yes Michael CHurchill has primary responsibility at the moment Apr 19 2011 11:44:46:247AM (blip) Bruce Lipshultz Measurement of CXR light in the pedestal region at both the high- and low-field sides blip,rmchurch D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 1 2009 09:45:41:090AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa no system is is installed and aligned, but not functional (appears to be a broken cable) Dec 5 2011 02:41:42:867PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar Disruption Mitigation yes two gas jet valves active as of Feb 2012 May 15 2012 10:09:23:597AM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 6 2007 10:50:41:677AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 6 2007 10:51:39:897AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 1 2012 01:24:23:953PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte DNB yes "The beam could break at any moment." May 15 2012 10:09:52:470AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung ECDC yes   Apr 26 2012 03:23:19:057PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes FRC-ECE is online May 14 2012 11:53:01:693AM (bespam) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea FTCI yes System Operational May 14 2012 11:50:45:590AM (irby) Jim Irby Fast two-color interferometer irby G-Side Ratiomatic yes Installed April 25,2012. New controller installed 5/29/2012 Jun 7 2012 10:40:00:957AM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no HV cables disconnected and power supplies off. Electrical plugs have been disconnected, capped and red tagged. Mar 5 2012 10:21:53:460AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational Apr 27 2012 07:41:46:907AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPC2 yes Operational Apr 27 2012 07:42:03:317AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 1 2009 09:45:50:933AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes system is functional and taking data Dec 5 2011 02:42:29:857PM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Apr 26 2012 03:23:49:607PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36:33:420PM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 6 2011 08:21:02:453AM (ypodpaly) John Rice High Resolution X-Ray cgao,ldelgado,rice,ypodpaly HXR yes 32 Channels operational,, no safety risk for in-vessel access Apr 14 2011 12:05:24:810PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna yes   May 31 2012 09:20:06:827AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes   May 31 2012 09:19:57:640AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes   May 31 2012 09:19:47:443AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Impurity Spectroscopy yes Being upgraded with better optics and new spectrographs. Dan Miller has primary responsibility. Apr 19 2011 11:46:02:193AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller Laser Blow-Off yes Pumped Down, Laser has not yet been tested but otherwise operational May 14 2012 04:31:17:037PM (nthoward) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no LH is now safe for manned entry into machine. Positioner locked and tagged off. Switches locked in dummy load position. Mar 2 2012 02:34:28:943PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer no off Apr 15 2011 08:24:27:930AM (dominguez) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek LoWEUS yes LoWEUS viewing the 10-30 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:34:077AM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke LPI no Beam line removed May 30 2008 02:09:12:833PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane Lyman-a. New B-PORT Lyman (BPLY) still being debugged. Apr 20 2012 10:44:00:540AM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke Magnetics yes   Dec 1 2011 11:51:51:970AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe McPherson no McPherson viewing the 10-14 nm region for molybdenum monitoring. It's days are numbered as LoWEUS has demonstrated superiority. Apr 20 2012 10:44:10:937AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry Michelson yes Vacuum 3-4e-8 T. Starting with Michelson at reduced speed. Apr 27 2012 07:42:41:960AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes   Dec 2 2011 12:27:47:163PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland MLP yes Operational. Connected to A-port probe system May 10 2012 08:40:19:910AM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE yes 2/29/2012 MSE operational. No HV or vacuum safety issues Feb 29 2012 12:26:13:863PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Voltage is on for He3 detectors on J port. Remaining voltages will be turned on for the first run. Apr 23 2012 09:31:22:063AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05:24:380PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA yes C-bottom and new F-bottom system ready. Dec 2 2011 12:28:44:843PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland PCI yes Operational. May 1 2012 08:31:33:743AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges yes HV power supplies turned ON in INIT, off in RECOOL May 10 2012 08:41:03:000AM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 1 2009 09:46:29:543AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter yes 3 chords operational but with high noise level Jan 6 2012 04:22:20:903PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Apr 26 2012 03:24:21:607PM (dekow) Gary Dekow Alternator to Power Room Power Supply Connection cochran,dekow,dterry,irby Power - PEI yes   Apr 26 2012 03:24:41:250PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Apr 26 2012 03:24:57:153PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Apr 26 2012 03:25:14:497PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational. Some dead probes. May 10 2012 08:41:58:120AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational. 4 out of 6 probes working. May 10 2012 08:41:40:557AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Operational. May 10 2012 08:42:13:733AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard Probe Array - UDIV yes Operational. Some dead probes. May 10 2012 08:42:32:663AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes On 1120608, the high frequency channels: 112, 140 and the variable, have been disconnected for some troubleshooting. All other channels are connected Jun 14 2012 11:28:59:603AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Operational. A variety of probe heads are ready for use. May 10 2012 08:43:10:937AM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. May 10 2012 08:43:24:887AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP no Not functioning. Probe tips are melted. Repair not performed during break. May 10 2012 08:44:43:137AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Shoelace Antenna yes Operational May 10 2012 08:45:08:320AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard SOL reflectometer yes c-port (top, middle, bottom) and h-port available. Only 1 of 4 locations can be used for each discharge May 1 2012 04:54:58:820PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin Sparker yes Sparker Power Supply powered up. Connected at K port using red cable 4/23/12 9:25AM Apr 23 2012 12:06:10:983PM (parkin) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station no SSS is up to air, no safety issues. Feb 27 2012 01:51:48:783PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes TCI lasers in operation May 14 2012 11:51:18:700AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:32:050PM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:51:363PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58:35:493AM (agraf) Alex Graf Visible Spectrometer agraf XEUS yes XEUS viewing the 1-6 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:43:107AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->5 available. Specific channels on various arrays display issues. Apr 20 2012 05:36:28:523PM (faustian) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke