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 2-21)

Engineering Operator Run Comment

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

Session Leader Plans

Entered: Sep 10 2012 02:41:53:620PM

Author: Geoff Olynyk

Entered: Sep 10 2012 03:26:37:787PM

Author: Geoff Olynyk

Session leader plan for run 1120911 (Tuesday, September 11, 2012) MP 675 - "Initial disruption mitigation experiments with two gas jets", run 3 of 3. G.M. Olynyk Objectives: Scan plasma stored energy (Wth) at constant current in I-mode (lower-single-null diverted configuration, reverse field/current) to determine the effect of stored energy on toroidal radiation asymmetry in gas jet mitigated disruptions (rapid shutdowns); Use two gas jets and scan gas jet stagger time in high-stored-energy plasmas to verify the effect of using multiple, toroidally separated gas jets on disruption mitigation (rapid shutdown) for high-power plasmas; and Do rapid shutdowns (mitigated disruptions) in high-power H-modes to check if there is a difference between H-modes and I-modes. Gas request: D2 majority fuelling. Neon seeding from B-side lower to get high-power I-modes. Load Ar into H-bottom 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 – up to 5.0 MW, turning on at t=0.750 s in all cases, remaining on until (mitigated) disruption at t=0.900 s [S.J. Wukitch, Y. Lin] X-ray tomography – at least arrays 1 and 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 [M. Brookman, U. Texas] Divertor thermocouples [D. Brunner] IR imaging – To get divertor heat loads [J. Terry] Core rotation from HiReX Jr [J. Rice, C. Gao] 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. Although, we will only fire a single gas jet on this day and so it shouldn't go above 500 mtorr. If you have sensitive diagnostics, these should have their protective gate valves closed. Notes for PhysOp and RF operator: Nearly every shot today has a different amount of heating. Table to be given by Session Leader to PhysOp and RF operator with list of shots, and guidance to be given throughout the day. Target I-mode shot 1120907028 (but with gas puffing from 1120907026 and 1120907027). Other instructions (Session Leader, auxiliary systems, diagnostic setup, etc.): Session Leader to announce that the (induced) disruptions will be at t=0.900 s today, in order that people can time their diagnostics to this if they wish. We are disrupting at this earlier time today (0.900 s) to avoid pre-heating the limiter and divertor surfaces too much from the high-power heating phase in these fairly low-density plasmas. ICRF request: Varying throughout the day, but always turning on at t=0.750 s, remaining on until (induced) disruption at t=0.900 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 on both B-port (old) gas jet 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. In all RF-heated cases, we turn on the RF at 0.750 s and induce disruption at 0.900 s (about 3 energy confinement times later). This is to prevent too much heating of divertor and limiter surfaces. The scans are quite fine, and with optimum timing, the targets are repeated. This is because we almost always observe significant variation in gas jet mitigated disruptions, even with identical target plasmas, and we want to be able to build statistics and find what is actually controlling the differences. It is noted that this plan comprises 25 useful shots, plus any required for discharge development. Given the long inter-shot wait time on gas jet shots, plus the extra-long wait time when we fire both gas jets, this is an ambitious plan. We hope to be able to accomplish the majority of the run plan.

Physics Operators Plans

Entered: Sep 10 2012 03:25:54:190PM

Author: Steve Wolfe

Physop plan and engineering setup for Tuesday, Sep 11, 2012 MP#675 Initial disruption mitigation experiments with two gas jets (part 3) SL: Olynyk PO: wolfe ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120907028 Acoil: -Dtop +Dbot +Jtop -Jbot (standard reverse field) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 2 psi Neon Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill H-bot with 1psi (or less) Argon (Hybrid enabled) (PG5) fill NINJA with 10 psi D2 DISABLED Enable gate-valves and shutters: VUV, Xeus/LoWEUS DISABLE gate valves for ECE and HIREX_SR Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): yes Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): 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 ********************************************** Physics operator plan: Load from 1120907, adjust TF_CURRENT for 5.6T (156900) Reduce nl04 program from 8 to 7e19; consider changes in PID for nl04 for non-cryopump. Change seg1 pg4 puff to 20msec (no cryo) Probably want to reduce ic_ef4 from 1320 Initial shot is planned for 2.5MW, so hold off on the neon until we need it. Almost the whole run is at fixed plasma target, except for the rf power, so after the first couple of shots there won't be a lot of dpcs adjustments except for startup and keeping an eye on the neon seeding and watching the shoelace. The last few shots are supposed to aim for H-mode at higher density nl04=1.1e20 (no I-mode window) May want to go back up to 5.8T if the sawteeth seem to be degrading the I-mode access or performance or anything. Should figure that out in the first 6 shots.

Session Leader Summaries

Entered: Sep 11 2012 05:20:07:293PM

Author: Geoff Olynyk

Session Leader Summary for 1120911 (Tuesday, September 11, 2012) MP 675 - Initial disruption mitigation experiments with two gas jets, run 3 of 3 The goal today was to explore gas jet disruption mitigation (rapid shutdown) with multiple gas jets into high-stored-energy I-modes, in the lower-single-null reversed-field configuration. Overall, the day was moderately successful, although we had to do abbreviated scans because of problems with the ICRF heating system and with the F-port gas injector. The first phase of the SL_PLAN was to do a scan of stored energy by varying the ICRF heating into otherwise-identical I-mode targets, and to develop a stable high-power target, with reproducible stored energy, for the later scan of gas jet stagger time. During this phase, we fired only a single gas jet (the B-port gas jet). Unfortunately, the FMIT (transmitter) for the E-port ICRF antenna had a problem with its crowbar, and so we had to use only two antennas (J and D). This meant that developing the high-power scenario was more difficult, since we had to push more power through each remaining antenna. Using an nl04 target of 0.7e20, we tried to develop a 4.00 MW scenario, but didn't have much luck. In the end, we had to reduce the power to about 3.60 MW of auxiliary heating, and increase the density target (nl04) to 0.8e20. This gave us stable heating from 0.750 s to our (induced) disruptions at 0.900 s, and a stored energy of about 128 kJ. The stored energy was remarkably consistent – using I-mode targets to get a high-power, high-stored-energy target was a good idea. With our target developed as of shot 8, we went on to fire single gas jets (B and F) into that target. This was used to verify the timing of the gas jets, in order to get a 'delta' between when the trigger was sent and when light was first seen on the DMBolo diodes. At this point, we found out that the F-port gas jet was behaving differently in the reversed-field configuration than it did in forward field: when there was plasma, it would "run away", i.e. it would not close after the pressure pulse, emptying the entire gas jet plenum into the torus, and raising torus pressures to multiple torr (2–4 torr). This meant that the pumpdown/recovery time between shots was extremely long – about 35 minutes, instead of the usual 15–20 minutes. We discussed some possible ways to fix it between shots, but in the end, decided to just press on, and abbreviated the stagger-time scan to reflect the reduced number of shots we now expected to get. We covered stagger times of -1.00 ms, -0.50 ms, 0.00 ms (optimum), +0.50 ms, and +1.00 ms. (Negative times mean that the gas from the F-jet arrived at the plasma before the gas from the B-jet.) Interspersed with a couple of fizzles, this took us through to shot 018. It is noted that the F-jet did not run away when there was TF but no plasma (on a fizzle), indicating that it was the poloidal field (specifically, the radial component of it) that was the problem. It is also noted that the F-valve seemed to open faster today than it did in forward field, requiring an adjustment in timing to get the optimum (when the gas from the B and F jets arrives at the plasma at the same time). If the radial component of the poloidal field in this reverse-field configuration were pulling the valve open (thus causing the 'runaway'), this would be consistent with the same field pulling the valve open faster at the beginning of the pressure pulse. After completing the (abbreviated) scan of gas jet stagger time, we tried two more shots with optimum timing. Shot 019 used the timing developed earlier in the day. Finally, we tried one more timing, moving the F-jet earlier by 0.300 ms, just to either fill in one more point in the scan, or find the optimum. Shot 020 was a fizzle and 021 (taken at 5:15 pm) used our adjusted timing. Overall, a successful run day, and lots of good data at high stored energy to use for G. Olynyk's thesis and to inform the ITER disruption mitigation system.

Physics Operator Summaries

Entered: Sep 11 2012 05:55:06:053PM

Author: Steve Wolfe

Physics Operator Summary for Tuesday, Sept 11, 2012 MP#675 Gas jet disruption experiments with 2 gas jets SL: Olynyk PO: wolfe EO: Cochran, Parkin, Byford ********************************************************************* Warning for future runs: Due to physop error, the TF on all shots today is ramping up from 5.6T at .2sec to 5.7T at 0.9sec (and would reach 5.8T at 1.5sec if it didn't disrupt at 0.9sec. This was an accident, you probably don't want to repeat it. ********************************************************************** The machine ran pretty well today, but some problems with the RF and with the gas jet system itself somewhat compromised the run. There was a problem with the FMIT#2 crowbar trigger that took the E-port antenna out of commission for the day; this is still unresolved. As a result, we were unable to get over 3.5MW reliably from the combination of D and J, which limited the stored energy to < 130kJ. After we got going, it turned out that the F-port Gas Jet valve stayed open after firing, dumping the whole plenum into the torus. This slowed the shot cycle to about 30minutes, and required cell access after each successful shot to reset gate valves. It turns out that this effect only happened on plasma shots. Fizzles only gave the nominal amount of gas from the F and B jets. We conclude that the fields, probably mainly from EF4, are acting to keep the solenoid open in reversed field operation. Shot#1 was the usual Tuesday data system test, except Bob had left the gas jet enabled so it fired and filled the torus. There were also issues with computers and data system, mostly fixed by Josh who came in early to deal with them, before disappearing for an off-campus meeting. There were no data system problems after this, although it was necessary to contact Mark London to have a problem on the alc-compute-1 disk mounting remedied (after shot#2). All plasmas today were successfully disrupted at 0.9sec by the gas jet(s). The gas jet also fired on 3 of the 4 fizzles; apparently the interlock to the fizzle detector worked on the fourth fizzle. Shots #2-8 were a combination of Wmhd scan and discharge development to optimize rf to provide a reliable target energy. We ended up reducing the outer gap somewhat from the reference shot, increasing the neon puff to 90, and raising the target nl04 program from 7e19 to 8e19. The RF pulse was kept short to avoid excess heating of the shoelace and GH limter, which were lighting up some. Longer rf pulses should probably put the gap back to 2cm, and may need higher density yet. The maximum reliable RF power today was 3.5MW in this configuration. Shots#9-21 were a scan of relative timing of the jets. There were a number of fizzles during this sequence, most as a consequence of higher than optimum pressure at breakdown. The ratiomatic was down for much of the day, but after it was revived, the pressure reading at breakdown varied from 0.07 to 0.1 mTorr. The pg4 puff was typically 20msec, and I dropped it down as low as 16 msec by the last shot (following the 5o'clock fizzle). At the start of the day it was noted that several LN2 valves were leaking and at least one was sticking. Gary was able to take advantage of the long shot intervals to thaw and chop his way down to these and tighten them up. The zbolo shutter is stuck in a mainly closed position, which blocks the view of hirex_jr, so after a failed attempt to fix it, the Argon was turned off on shot#9. Scorecard: Test shots 1 (with gas jet!) Duds 0 Fizzles 4 Plasmas 16

Session Leader Comments
Sep 13 2012 01:40:15:967PM		Geoff Olynyk	List of all shots from run 1120911, plus good shots to use for scans. Note t_stag = F_trig–B_trig+(F_delay–B_delay) where B_delay = 2.900 ms; F_delay = 3.450 ms therefore F_delay–B_delay = 0.550 ms so if F_trig–B_trig = –0.550 ms, then t_stag = 0 num nebar Wth B_trig F_trig t_stag Description -------------------------------------------------------------------------------------------------- 001 -- -- -- -- -- * No plasma (C-Mod cycle test) 002 1.67 92 0.900000 -- -- Wth scan - note high density 003 1.01 97 0.900000 -- -- Wth scan - density better 004 1.06 111 0.900000 -- -- Wth scan 005 1.08 107 0.900000 -- -- ICRF trippy 006 1.12 89 0.900000 -- -- ICRF even more trippy 007 1.07 113 0.900000 -- -- Wth scan - ICRF better 008 1.19 121 0.900000 -- -- Increased density; I-mode 009 1.17 131 -- 0.898940 -- First shot with F-jet 010 1.17 128 -- 0.899030 -- Another F-jet only; determine it is running away 011 -- -- 0.900000 0.899760 +0.310 * Fizzle. Both jets fired 012 1.17 110 0.900000 0.899760 +0.310 RF trippy; both gas jets fired 013 1.15 127 0.900000 0.898760 -0.690 Good RF and Wth; use for t_stag scan 014 1.11 128 0.900000 0.899260 -0.190 Decent RF; use for t_stag scan 015 -- -- 0.900000 0.900260 +0.810 * Fizzle. Both jets fired 016 1.15 124 0.900000 0.900260 +0.810 Good RF and Wth; use for t_stag scan 017 -- -- -- -- -- * Fizzle. Jets didn't fire 018 1.11 122 0.900000 0.900760 +1.310 Decent RF and Wth; use for t_stag scan 019 1.13 121 0.900000 0.899760 +0.310 Decent RF and Wth; use for t_stag scan 020 -- -- 0.900000 0.899460 +0.010 * Fizzle. Both jets fired 021 1.13 124 0.900000 0.899460 +0.010 RF tripped; Wth recovering; use for t_stag scan We want to use the following shots for our Wth scan (B-jet only): shot nebar Wth Other notes ---------------------------------------------------------------------- 1120622007 1.55 64 Forward field; L-mode; note higher density 1120911006 1.12 89 Reverse field; probably L-mode 1120911003 1.01 97 Reverse field; probably L-mode 1120911005 1.08 107 Reverse field; probably L-mode 1120911004 1.06 111 Reverse field; probably L-mode 1120911007 1.07 113 Reverse field; could be L- or I-mode 1120911008 1.19 121 Reverse field; I-mode And the following shots for the gas jet stagger time scan: shot nebar Wth t_stag Other notes ---------------------------------------------------------- 1120911010 1.17 128 F only Reverse field; I-mode 1120911013 1.15 127 -0.690 Reverse field; I-mode 1120911014 1.11 128 -0.190 Reverse field; I-mode 1120911021 1.13 124 +0.010 Reverse field; I-mode 1120911019 1.13 121 +0.310 Reverse field; I-mode 1120911016 1.15 124 +0.810 Reverse field; I-mode 1120911018 1.11 122 +1.310 Reverse field; I-mode 1120911008 1.19 121 B only Reverse field; I-mode
Sep 11 2012 08:45:12:607AM	1120911001	Geoff Olynyk	Shot 1 was a system test earlier today, and is not part of MP 675.
Sep 11 2012 08:47:48:500AM	1120911002	Geoff Olynyk	Possible delay due to problem with the interlock on the door between the control room and the power room. Bill Byford being called. Also - No E-antenna due to transmitter crowbar (?), at least for first three shots.
Sep 11 2012 09:06:38:210AM	1120911002	Geoff Olynyk	Description: Starting phase 1 of SL_PLAN: Wth scan with a single gas jet. I-mode target from 1120907026/027/028, with 2.50 MW ICRF heating from D and J antennas only (FMIT for E-antenna has a crowbar). Gas jets - B-jet only, firing at t=0.900000 s. Result: Locked mode B-jet fired successfully Good mitigated disruption Pressure after shot according to TC gauge (callout from Vacuum Operator) - 275 mtorr (didn't close gate valves so may be a slight underestimate)
Sep 11 2012 09:10:46:460AM	1120911002	Geoff Olynyk	No Thomson on this shot (they weren't warmed up yet - decided to take the shot anyway).
Sep 11 2012 09:26:12:803AM	1120911003	Geoff Olynyk	Description: Continue Wth scan, with single gas jet. ICRF heating increased to 3.00 MW from D and J antennas. Gas jets - B-jet only, firing at t=0.900000 s. Result: RF tripping down to 2 MW, stored energy 97 kJ at disruption Pressure after shot according to TC gauge (callout from Vacuum Operator) - 302 mtorr
Sep 11 2012 09:48:40:030AM	1120911004	Geoff Olynyk	Description: Continue Wth scan, with single gas jet. ICRF heating increased to 3.50 MW from D and J antennas. Gas jets - B-jet only, firing at t=0.900000 s. Result: - Probably an I-mode - Gas jet fired successfully - D antenna faulting just before disruption, stored energy 111 kJ at time of disruption - More noise on DMBolo channels on that one than on shots 2 or 3 Pressure after shot according to TC gauge (callout from Vacuum Operator) - 302 mtorr
Sep 11 2012 10:07:04:610AM	1120911005	Geoff Olynyk	Description: Continue Wth scan, with single gas jet. Requested ICRF heating increased to 4.00 MW from D and J antennas. This will be our max heating possible, since we have no E-antenna. Enable neon seeding for this shot (B-side lower) to try to improve ICRF coupling. Gas jets - B-jet only, firing at t=0.900000 s. Result: - Gas jet fired successfully - D-antenna faulting again, stored energy 107 kJ at time of disruption Pressure after shot according to TC gauge (callout from Vacuum Operator) - 299 mtorr
Sep 11 2012 10:26:44:683AM	1120911006	Geoff Olynyk	Description: Try to fill in our Wth scan by going back to approx. 3.5 MW and modifying the power waveform to reduce faulting (step D antenna up in steps). Gas jets - B-jet only, firing at t=0.900000 s. Result: - Gas jet fired successfully - D antenna still tripping a lot, stored energy 89 kJ at disruption Pressure after shot according to TC gauge (callout from Vacuum Operator) - 296 mtorr
Sep 11 2012 10:55:05:947AM	1120911007	Geoff Olynyk	Description: Increase neon seeding and reduce outer gap to try to improve RF performance. Total RF request just over 3.5 MW, from D and J antennas. Gas jets - B-jet only, firing at t=0.900000 s. Result: - Gas jet fired successfully - Still tripping, stored energy 114 kJ at disruption Pressure after shot according to TC gauge (callout from Vacuum Operator) - 308 mtorr
Sep 11 2012 11:30:58:693AM	1120911009	Geoff Olynyk	Description: Move to phase 2 of SL_PLAN. Use target developed in shot 008. Gas jets - F-jet only, firing at t = 0.898 940 s. Result: - F-jet fired but ran away really badly - stayed open for 200 ms, emptied the entire plenum ... very much hoping that this was not the dying gasp of the valve (we'll repeat the shot to confirm) - Good RF. Stored energy at time of disruption - 131 kJ - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 2500 mtorr (!)
Sep 11 2012 11:51:43:393AM	1120911009	Geoff Olynyk	Trying to figure out timing - shot 8 (B-jet only) trigger time 0.900 000 s start to see light in plasma at 0.903 070 delay 3.070 ms shot 9 (F-jet only) trigger time 0.898 940 s start to see light in plasma at 0.902 978 s delay 4.038 ms delta_delay = 0.968 ms Use delta_delay of -0.97 ms. So if we fire B-jet at 0.900 s, we want to fire F-jet at 0.89903
Sep 11 2012 11:57:26:033AM	1120911009	Geoff Olynyk	Taking cell access before shot 10. That huge pressure pulse made all kinds of gate valves close and stay closed, have to be manually reset.
Sep 11 2012 12:18:09:400PM	1120911010	Geoff Olynyk	Description: Returning to business after long delay from runaway pressure pulse on last shot. Repeat shot 9, hopefully F-jet doesn't run away this time. Slightly change timing to new optimum (delta, of -0.97 ms, that is, fire F-jet earlier than B-jet by 0.97 ms) Gas jets - F-jet only, firing at t = 0.899 030 s. Result: - F-jet fired but ran away again ... - Good RF. Stored energy at time of disruption - 128 kJ - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 2700 mtorr (!)
Sep 11 2012 12:29:09:713PM	1120911010	Geoff Olynyk	Another long cell access after shot 10 to reset gate valves.
Sep 11 2012 12:42:26:107PM	1120911011	Geoff Olynyk	Description: Rui Vieira and Bob Granetz hit the F-jet with a hammer (seriously - a rubber mallet). Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.899 760 s Result: - Fizzle. No plasma, no RF. - B-jet and F-jet fired successfully. No flow runaway this time. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 572 mtorr (!) next - repeat with plasma
Sep 11 2012 01:07:17:463PM	1120911012	Geoff Olynyk	Description: Attempt to fire both gas jets at same time again, but with plasma. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.899 760 s Result: - Plasma. RF faulted (D then J); stored energy down to 110 kJ at time of disruption. - B-jet and F-jet fired successfully. F-jet ran away though. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 2600 mtorr (!)
Sep 11 2012 01:42:22:983PM	1120911013	Geoff Olynyk	Slow progress due to very long pumpdown times due to F-port valve running away. It's probably the reverse-field operation - this is causing a difference in magnetic field along the axis of the solenoid vs. the forward-field operation (because the F-port fast valve is mounted so that it points radially outward, and is below the midplane). We should rotate the F-port valve so it's oriented a different way relative to the large poloidal field.
Sep 11 2012 01:54:02:040PM	1120911013	Geoff Olynyk	Description: No choice but to carry on (at greatly reduced rate due to very long pumpdown time with the F-jet running away like this). Move to -1.00 ms stagger time. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.898 760 s Result: - Plasma. RF good this time - stored energy 128 kJ at time of disruption - B-jet and F-jet fired successfully. F-jet ran away again. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 3200 mtorr (!)
Sep 11 2012 02:09:40:050PM	1120911014	Geoff Olynyk	Two ideas for fixing this during the run today (during one of our nice 40-minute pumpdown times)... 1. Add a sleeve of iron around the F-valve. Problem is that it experiences a field (PF) of about 0.1 T, which means it would experience significant force. So any such sleeve would have to be strongly bolted to something. 2. Rotate the valve/plenum assembly about the "axis of the plumbing" so that the valve axis points toroidally (instead of radially). The problem is that there is no "axis of plumbing" because the stainless steel pipes come in to the plenum at one angle, and go out of the valve 90 degrees off from that. So we can't rotate the valve/plenum assembly simply by unbolting some ConFlat gaskets - it has to be significantly re-plumbed. It appears that we have no choice but to continue on at this reduced shot frequency.
Sep 11 2012 04:19:17:383PM	1120911014	Geoff Olynyk	Description: Continuing phase 2 of SL_PLAN. Move to -0.50 ms stagger time. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.899 260 s Result: - Plasma. J ICRF antenna tripped once but recovered. Stored energy 128 kJ at time of disruption, on an increasing slope. - B-jet and F-jet fired successfully. F-jet ran away again. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 4.3 mtorr (!) Something weird going on. If we're dumping the entire F-valve plenum each time, why is it getting to higher pressure each time this happens? B-jet is working fine, not running away. Suspect a problem with thermocouple gauge.
Sep 11 2012 02:49:03:047PM	1120911015	Geoff Olynyk	Description: Continuing phase 2 of SL_PLAN. Move to +0.50 ms stagger time. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.900 260 s Result: - Fizzle. No plasma, no RF. - B-jet and F-jet fired successfully. F-jet fired, but did NOT run away. I think we can conclusively say that it's the fields that are causing the F-valve to run away. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 555.3 mtorr (perfect) next - try again with no fizzle
Sep 11 2012 03:34:42:370PM	1120911016	Geoff Olynyk	Description: Try again at +0.50 ms. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.900 260 s Result: - Plasma. Good RF coupling. - Both jets fired, F jet ran away again. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 4.0 torr (ran away again)
Sep 11 2012 03:41:24:707PM	1120911017	Geoff Olynyk	Description: Go to +1.00 ms stagger time. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.900 760 s Result: - Fizzle. Gas jets did NOT fire on fizzle (signal went to interlock box - didn't come out - as it is supposed to be.) next - try again
Sep 11 2012 03:54:45:207PM	1120911018	Geoff Olynyk	Description: Go to +1.00 ms stagger time. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.900 760 s Result: - Plasma. RF (J) faulted once but recovered. Stored energy 121 kJ at disruption. - Gas jets fired successfully. F valve ran away again. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 3.3 torr (ran away again)
Sep 11 2012 04:39:17:053PM	1120911019	Geoff Olynyk	Description: Having completed an abbreviated scan of gas jet stagger time (-1.00, -0.50, 0.00, +0.50, and +1.00 ms), we continue to phase 3 of SL_PLAN. Try to build statistics on the most important shot, which is OPTIMUM TIMING INTO HIGH POWER I-MODE. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.899 760 s Result: - Plasma. RF (J) faulted but recovered. Stored energy 121 kJ at disruption. - Gas jets fired successfully. F valve ran away again. Digitizer on the gas jet system messed up - all the pressure signals, etc. are not what they should be. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 3.2 torr (ran away again)
Sep 11 2012 04:55:17:253PM	1120911020	Geoff Olynyk	Description: Adjust timing on F-jet (make it 0.3 ms earlier) and try again. Was supposed to be last shot for today. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.899 460 s Result: - Fizzle. No RF. - Both gas jets fired successfully, but F-jet didn't run away because no PF. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 603 mtorr (F-jet didn't run away)
Sep 11 2012 05:18:45:190PM	1120911021	Geoff Olynyk	Description: Try again with adjusted timing on F-jet. Last shot for today. Gas jets - BOTH enabled B-jet firing at t = 0.900 000 s F-jet firing at t = 0.899 460 s (0.3 ms earlier than last time) Result: - Plasma. J antenna tripped out but recovered, kind of late. Stored energy 125 kJ at disruption. - Both gas jets fired successfully. F-jet ran away. - Pressure after shot according to TC gauge (callout from Vacuum Operator) - 3.3 torr (F-jet ran away)

Physics Operator Comments
Sep 11 2012 07:19:45:003AM		Steve Wolfe	Setting up for MP#675 run Load from 1120907028 Seg1 changes: pg4 from 42 msec ending at -.4 to 20msec ending at -.5 ic_ef4u from 1320 to 1310. Seg2 changes: nl04 from 8 to 7e19 leave PID = 4,0,5.4667 until we see how it responds TF_CURRENT from 162500 to 156900 for 5.6T reduce pg5 (argon) from 100msec to 75msec @100% starting .3sec note: pg1 (neon) is 200msec at 60% starting .35sec, Load at 11-Sep-2012 07:18:45.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Rick Murray reports there may be a delay for RF; FMIT#2 crowbar has a problem.
Sep 11 2012 07:40:06:323AM	1120911001	Steve Wolfe	Shot#1: Supposed to have been an no power test, but the gas jet people left their system armed and enabled, so the gas jet fired! Torus is up to 275mTorr. Pumping out now, I hope.
Sep 11 2012 09:10:03:727AM	1120911002	Steve Wolfe	Shot#2: Trying for the first shot, 2.5MW, nl04=7e19 We will be running without E-port antenna today, so the power scan will be limited to 4MW on the top end. Result:Disrupted qt 0.9sec, with gas jet. GV2 did not close in pulse? Ian's vacbrbz job failed on this shot, alcserv4 seems to not find the /home directory.
Sep 11 2012 09:15:31:623AM	1120911002	Steve Wolfe	Shot#2: Trying for the first shot, 2.5MW, nl04=7e19 We will be running without E-port antenna today, so the power scan will be limited to 4MW on the top end. Result:Disrupted qt 0.9sec, with gas jet. GV2 did not close in pulse? Ian's vacbrbz job failed on this shot, alcserv4 seems to not find the /home directory. I can move the vacbrbz job, but alc-compute-1 is used for a lot of stuff, including fast_efit and efit20.
Sep 11 2012 09:31:35:437AM	1120911003	Steve Wolfe	Shot#3: RF at 3MW, no pcs changes. IGT down to 2.2e-6 Torr before INIT Amanda will open ECE permissive for this shot. Result: disrupted on schedule. RF D&J faulted but came back Not sure if this one got an I-mode or not, Wmhd gets to ~100kJ. vacbrbz ran that time, mrl probably fixed alc-compute-1. Injections from the gh limiter (llnl1 camera), and a bit of a cyan spot on the display_energy screen; LLNL1 camera shows some heating on the shoelace and the limiter, does not glow after the disruption. Ratiomatic read .075 mTorr at breakdown, a little on the high side. Next: Increasing rf to 3.5MW, no pcs changes
Sep 11 2012 09:49:03:630AM	1120911004	Steve Wolfe	Shot#4: RF at 3.5MW, no pcs changes. IGT down to 2.3e-6 Torr before INIT Amanda will not allow ECE permissive for this shot or after. Result: wmhd to 122kJ, but dropped to 110kJ after D-port fault Still getting injections from gh region and maybe shoelace. Yijun would like smaller gap, but I want to hold off a little. Try adding neon to next shot, see if that helps the rf. Next: rf to 4MW, enable neon puff (bside lower)
Sep 11 2012 10:16:05:937AM	1120911005	Steve Wolfe	Shot#5: RF at 4MW, enable b-side lower: programmed for .35 to .55 at 60%, neon 1.8psi IGT down to 2.5 e-6 Torr before INIT (note that it goes up to 3.5e-6 when gv1 closes) Result: disrupts on schedule, injection at 0.8sec is still there Wmhd 107kJ at disruption, d-faulted again. Neon did not seem to help Next: Change rf waveform, try to keep rf on until gas jet time
Sep 11 2012 10:29:17:940AM	1120911006	Steve Wolfe	Shot#6: RF at 3.5MW with a step up, no PCS changes IGT to 2.1e-6 before init Result: disrupts on schedule, rf still faulting,max stored energy ~103kJ down at 0.9sec. Next: try reducing outer gap. Presently at 2.0cm, increase rcur by 4mm and see what happens to the gh and shoelace Next:
Sep 11 2012 10:51:07:663AM	1120911007	Steve Wolfe	Shot#7: try reducing outer gap. Presently at 2.0cm, increase rcur by 4mm from .656 to .660 and see what happens to the gh and shoelace Wukitch is suggesting higher neon puff. Increase pg1 to 90%, still 200ms Load at 11-Sep-2012 10:36:01.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done IGT to 2.5e-6 before INIT, just past 15minutes in recool Result: Wmhd to 116kJ, D still faulting, a little increase in the gh heat, not too bad (first calculation showed a lot more on top??) Next: Go to nl04=0.8e20, see if that helps the RF
Sep 11 2012 11:14:31:610AM	1120911008	Steve Wolfe	Shot#8: Go to nl04=0.8e20, see if that helps the RF Load at 11-Sep-2012 10:52:22.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done IGT to 1.9e-6 before INIT (delay for EF1L cooling, since LN2 valve is cranky) Result: rf stays on, wmhd to 124kJ Xeus/loweus were enabled on that shot, shows neon is dropping after 0.74sec, could stand delaying the puff, but SL says leave it. Next: begining jet scan, no PCS changes
Sep 11 2012 11:29:52:367AM	1120911009	Steve Wolfe	Shot#9: begining jet scan, no PCS changes argon (h-bot) off, because zbolo shutter is jammed so hirex_jr is blocked leave neon as is IGT to 2.4e-6 before INIT Result: F-port jet dumped a LOT of gas into the torus Wmhd=130kJ, Prf~3.6MW Aside from the fact that the F-jet valve isn't closing, we should be on our way. Next: Proceed (with caution?) once they pump down
Sep 11 2012 12:16:44:657PM	1120911010	Steve Wolfe	Shot#10: Proceed (with caution?) once they pump down SL is modifying gas jet timing, firing only F jet IGT to 2.5e-6 after 29minutes in recool Then had a delay for a cell access because all gate valves were closed and could not open from PLC in control room IGT=1.3e-6 before INIT (ratiomatic has died) Result: F-jet dumped its plenum again. It's going to be a long pump. Wmhd=128kJ, target seems to be hanging in there. GV2 didn't close in pulse, but I don't think it matters much since the mks will be saturated anyway. Next: Staggering along?
Sep 11 2012 12:46:52:777PM	1120911011	Steve Wolfe	Shot#11: Proceed with jet timing scan Both jets enabled. Rui gave the F-jet valve a calibrated whack during the cell access. TS people have abandoned ship IGT at 2.5e-6 after 24minutes, before INIT Result: fizzle, I saw IGT got up to 6e-6 before the pulse. This time the F-jet worked properly. Pressure excursion may have been the VUV gate valve; the McPherson vacuum had shut down, and the permissive was on. Will be off now Next: just try again, same timing
Sep 11 2012 01:09:16:357PM	1120911012	Steve Wolfe	Shot#12: just try again, same timing Reduce the pg4 from 20 to 18msec Load at 11-Sep-2012 12:48:49.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done IGT 1.6e-6 before INIT Result: F-jet dumped plenum again, only works without plasma? wmhd down to 110kJ, RF faults on both D and J. Startup has an injection on Zmeter, not seen on Dalpha. Next: continue scan, no pcs changes
Sep 11 2012 02:08:54:530PM	1120911013	Steve Wolfe	Shot#13: continue scan, no pcs changes IGT=2.2e-6 after 35minutes, IGT=1.8e-6 before init (PF coil cooling) Result: Another day another gas jet dump. Wmhd=127kJ, Prf=3.5MW Next: continuing timing scan
Sep 11 2012 02:21:23:240PM	1120911014	Steve Wolfe	Shot#14: continue scan, no pcs changes IGT=1.9e-6 at 30minutes, before INIT Result: wmhd=128kj at the disruption One RF fault early in the pulse, on J, but it recovered. Torus pressure is increasing each shot. Next: staggering along.
Sep 11 2012 02:51:27:963PM	1120911015	Steve Wolfe	Shot#15: continue scan, no pcs changes IGT=2.3e-6 at 29 minutes Result: fizzle. Bounced at 17msec, big CIII signal at .01sec Jets fired, and again the F-jet did not dump the plenum. Clearly a field effect. Next: increase pg4 back to 20msec (probably not useful, but something to do).
Sep 11 2012 03:13:31:977PM	1120911016	Steve Wolfe	Shot#16: increase pg4 back to 20msec, try again Load at 11-Sep-2012 14:52:42.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done IGT to 2.0e-6 at 20minutes, just before INIT Result: plasma disrupts on schedule Wmhd=124kJ RF clean at 3.5MW Next: On with the scan
Sep 11 2012 03:42:33:657PM	1120911017	Steve Wolfe	Shot#17: On with the scan (after another 30minutes of pumping) Just noticed I must have programmed a slight slope on the TF current; it's at 5.7T instead of 5.6 at 0.9sec, the time of the disruption. I may not have changed the end point from the setting for 5.8T? Too late to worry about it now, shouldn't hurt, since it's been that way all day. IGT=2.5e-6 at 28minutes, before INIT No TS this shot Result: another fizzle? Ratiomatic has revived, pressure is high around 0.1mTorr. No gas jet. Maybe fd interlock actually took them out this time Next: reduce pg4 back to 18msec and repeat
Sep 11 2012 04:17:13:027PM	1120911018	Steve Wolfe	Shot#18: reduce pg4 back to 18msec and repeat Load at 11-Sep-2012 15:43:32.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done IGT=1.4e-6 at INIT, hope I didn't lower pg4 too much Result: wmhd=123kJ, rf fault (J) early but mostly recovered Ratiomatic is reading .07mTorr at breakdown Next: continue the scan, back to nominally no stagger
Sep 11 2012 04:27:05:563PM	1120911019	Steve Wolfe	Shot#19: continue the scan, back to nominally no stagger No pcs changes IGT=2.5e-6 at 28minutes Result: rf faults early in pulse, wmhd=121kJ Next: small change in F jet timing
Sep 11 2012 04:57:00:457PM	1120911020	Steve Wolfe	Shot#20: small change in F jet timing, no PCS changes IGT=2.3e-6 at 28minutes before going to INIT Result: fizzle. Ratiomatic is at .09mTorr Gas jet fired, but did not runaway. Will try for one more. Next: reduce pg4 from 18 to 16msec
Sep 11 2012 05:18:56:453PM	1120911021	Steve Wolfe	Shot#21: small change in F jet timing, reduce pg4 from 18 to 16msec Load at 11-Sep-2012 16:57:50.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done IGT=1.9e-6 at 19 minutes before INIT This will be the last shot of the day, regardless Result: disrupted on schedule, jets both went Wmhd=125kJ, with a positive Wdot;J RF fault half-way through the RF pulse End of Run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	07:22:14:890AM	Test	Ok
2	08:59:57:597AM	Plasma	Ok
3	09:19:14:983AM	Plasma	Ok
4	09:39:04:453AM	Plasma	Ok
5	10:02:37:087AM	Plasma	Ok
6	10:21:39:220AM	Plasma	Ok
7	10:39:23:600AM	Plasma	Ok
8	11:03:52:963AM	Plasma	Ok
9	11:24:04:460AM	Plasma	Ok
10	12:11:57:823PM	Plasma	Ok
11	12:38:38:510PM	Plasma	Ok
12	01:01:07:287PM	Plasma	Ok
13	01:41:58:730PM	Plasma	Ok
14	02:14:18:583PM	Plasma	Ok
15	02:46:03:880PM	Plasma	Ok
16	03:07:25:830PM	Plasma	Ok
17	03:38:09:953PM	Plasma	Ok
18	03:50:38:170PM	Plasma	Ok
19	04:21:28:660PM	Plasma	Ok
20	04:52:22:623PM	Plasma	Ok
21	05:14:02:473PM	Plasma	Ok

System Availability

Sep 11 2012 07:21:55:763AM

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 yes The system is currently operational for Te tilde measurement. Talk to Choongki about the current configuration Jul 3 2012 04:38:00:317PM (nthoward) Anne White Correlation ECE nthoward,sck83,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 yes LH is now available for plasma operation up to ~900 kW net power. Jul 3 2012 02:50:00:693PM (wallaceg) 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 no Midplane Lyman-a not functioning. New B-PORT Lyman (BPLY) still being debugged. Jul 12 2012 08:52:28:233AM (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 under vacuum but is not run on a day-to-day basis. Can be requested if desired. LoWEUS has taken over as the primary Mo monitor. Jul 12 2012 08:53:14:937AM (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. Jul 10 2012 07:08:06:883PM (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 yes SSS is under vacuum and fully available. Jul 3 2012 02:46:59:753PM (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 both lasers, density calibration ongoing. Jul 19 2012 10:20:09:220AM (jrwalk) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes Operating with both lasers, density calibration ongoing. Jul 19 2012 10:20:28:323AM (jrwalk) 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