Miniproposals

Miniproposal: 534 Date Filed: 2/21/2008 Title: Foil/AXUV Bolometer Calibration in Helium First Author: Matt Reinke Session Leader: Matt Reinke (shots 1-18)

Miniproposal: 567 Date Filed: 8/6/2009 Title: Spatial Distribution and Dynamics of Disruption Mitigation Radiation First Author: Matt Reinke Session Leader: Bruce Lipschultz (shots 19-33)

Engineering Operator Run Comment

MP 534: Foil/AXUV Bolometer Calibration in Helium

Session Leader Plans

Entered: Dec 2 2010 12:06:17:643PM

Author: Matt Reinke

Run Plan for MP 534: Foil/AXUV Bolometer Calibration in Helium The primary goal of the run will make highly radiative discharges in He main-ion plasmas for calibration of the AXUV and foil bolometry. Because this will likely not take the entire 1/2 day a number of piggyback experiments that require He main ion will be run. ECDC in He overnight B-SIDE-LOWER with 1.5 psi Ar a) LHRF into He plasmas b) scopping for MP 622 - growing W fuzz c) I-Modes in He d) HIREXSR calibration 1) Main-ion change-over (5-6 shots) Load 1090821016 (LSN, 5.4 T, 1 MA, nl04=1.0), no cryopump, no Ar LHRF from 0.7-1.0 (P, n|| as desired) ICRF from 1.05-1.45 (D+E) P=2-3 MW adjust ICRF level to find H-mode threshold. Monitor IR for temperature change, adjust nl04, Bt to change L/H threshold to increase PSOL to divertor. if (b) gets what they need before main-ion is changed over, then adjust nl04 as desired by (a) 2) Bolometry calibration (3-4 shots) Load 1100720015 (USN, 0.8 MA, nl04=0.8). Change Bt=5.4 T enable cryopump ICRF (D+E) at 3 MW from 0.5-1.5 B-SIDE-LOWER steady puff from 0.4-1.3 Adjust ICRF power/Ar puff to get steady highly radiative discharge. 3) Large outer gap scan (2 shots) Load 1100720026 which is a 10 cm outer gap scan at fixed q, cryopump off 4) I-modes in Helium (remaining) Return to equilibrium from (2) and increase ICRF power (add J-ANT) to see if there's any indication of I-modes. Cryopump off, diagnostic Ar puff

Entered: Dec 3 2010 09:02:33:653AM

Author: Jim Terry

For the 2nd half of the run (starting ~1:30 pm) This is an exploratory experiment - there is no MP Session leader: B. Lipschultz/J. Terry Physics operator: S. Shiraiwa fill NINJA with 8 PSI He4 ENABLE NINJA Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo, HIREX-Sr, B-spectrometer GV no LH needed ICRF: required Cryopump: not needed DNB: not needed Necessary diagnostics: Divertor IR camera Divertor TCs LH hard x-ray array WIDE2, and LH video cameras; GHLIM camera is desirable Thermocouples on limiters ------------------------------------------------------------------------------- Run plan: We will trigger downward-going Vertical Disruption Events (VDEs) in a series of plasmas varying amounts of stored energy. The goal is to determine our capability for measuring the disruption heat-flux onto the outer divertor targets with high (i.e. 1 ms) time resolution. This may allow resolution of the heat flux onto the targets during the disruption's thermal quench from the heat-flux during the current quench. If this is not possible, then at least we will see what time resolution is possible for the heat-flux diagnostics across a disruption. Previous study has shown that the disruption heat-flux does depend on plasma current, presumably through the loss of magnetic energy (the current quench). The diagnostic "exploration" that is required: How long is the disruption radiation "flash" that obscures the target thermal emission? What integration times are needed for the IR camera in order to avoid saturation during the "flash"? Can the image stabilization be accomplished on the sub-full-frame image from the IR camera? (Sub-full-frame imaging must be used in order to get the 1 ms framing period.) Run Plan: For all of the following shots allow an unmitigated, downward-going VDE to occur at ~1.2 sec) for the following discharge conditions: 1) Ip=1.1 MA, Bt=5.4 or if need go to 6.2 T to avoid Ohmic H-modes), NL04=0.8e20 (to stay sheath-limited at target), no icrf power, similar to shot 1100824029, but strike point held constant (instead of SSEP sweep) on the 3rd tile-row from the bottom (i.e. ~-50.5 cm). I expect this discharge to have Wp~40 kJ. IR camera setup for full-frame images (frame rate =380 Hz - 2.6 ms time resolution) repeat as necessary, modifying integration times to avoid saturation in camera during the disruption "flash" (3 shots anticipated) 2) repeat 1 with sub-windowing for IR camera with 1 kHz frame rate (1 ms time resolution) (3 shots anticipated) 3) Ip=1.0 MA, Bt=5.4 T, NL04 (target)=0.9e20 (to stay sheath-limited at target), 2.5 MW of icrf power, similar to 1100819020, but with RF held constant and the outer strike point held constant at -50.5 cm. I expect this discharge to have Wp~150 kJ. IR camera setup for full-frame images (frame rate =380 Hz - 2.6 ms time resolution) repeat as necessary, modifying integration times to avoid saturation in camera during the disruption "flash" (3 shots anticipated) 4) repeat 3 with sub-windowing for IR camera with 1 kHz frame rate (1 ms time resolution) (5 shots anticipated) 5) if time permits, drop the current to Ip=0.8 MA and NL04 (target)=0.5e20 (to stay sheath-limited at target),2.5 MW of icrf power.

Physics Operators Plans

Entered: Dec 4 2010 03:00:00:060PM

Author: Syunichi Shiraiwa

Engineering setup for Friday 2010/12/03 MP534 (1/2 day) - Foil/AXUV Bolometer Calibration in Helium MP??? - Disruption energy deposition on divertor Session leaders: M. Reinke and J. Terry Physics operator: S. Shiraiwa Overnight: ECDC in He overnight Run will start at 09:00 and end at 17:00. Power systems as on: 1090821016 (LSN, 5.4 T, 1 MA, nl04=1.0, no Cryopump) A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Hybrid enabled (standard configuration) 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 He Hybrid enabled (PG3) fill NINJA with 8 psi He4 DISABLED (will be used in the 2nd session) Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo, HIREX-Sr, B-spectrometer GV Torvac setup: keep gate valves open during pulse Specific diagnostics: DNB, HXR array, LH probes, Divertor IR camera, Divertor TCs, WIDE2 and LH video cameras, Thermocouples on limiters, GHLIM camera(Desired) ------------------------------------------------------------------------------ Boronization: no Impurity injector: no ICRF: yes LH: yes DNB: yes Cryopump: yes ------------------------------------------------------------------------------

Session Leader Summaries

Entered: Dec 3 2010 04:24:29:513PM

Author: Matt Reinke

Summary for MP534: Foil/AXUV Bolometer Calibration in Helium (shots 001-018) We actually got a little of everything done on the MP. Overall the "light bulb" plasmas that were easily made back in FY08 were difficult to make so we didn't get as good of results as 1080411, but we got the job done. Shots: 001-006 were LSN shots to change over the main-ion and tune up the ICRF as well as test LHRF into He plasmas and do some scoping studies for MP 622. LHRF was able to get a steady 700 kW coupled easily at nl04 ~ 1.0. There was no change in Vloop or nonthermals but the H-PORT He II and H I monitor had a strong ~2 kHz signal on it during the pulse. A good start according the Greg. The 1 MA, nl04~1.2 L/H threshold was found to be around 3.5 MW (ICRF+Ohmic) in 004. A 3 point density scan with ICRF should allow MP 662 to develop an acceptable target discharge. Shots: 007-010 were used to make highly radiative discharges for bolometry cross-calibration. We seeded with Ar, but the high RF power was still making the KLIM very hot so we didn't push it for too many shots. It looks like the cross-calibration is still the same as in previous years even with the new foils (see 008). The core emissivity matches and the off-axis is way different presumed to be from the spectral sensitivity of the AXUV diodes. Shots: 011-012 were outer gap scans for HIREXSR calibration. We actually got what we needed on 011, but a physop mistake had us putting ICRF into the 011 plasma which had a RGAP of 2.1->10.0 cm from t 0.63-1.3. Amazingly J+D stay coupled (see Te increase) until RGAP ~ 4.1 and E stays until it was programmed to turn off at 1.1 seconds where RGAP ~ 8.0 cm!!! A pretty good demonstration of the FFT by accident. Shots: 013-018 were attempts to make I-mode plasmas in He. I had intended on starting from an equilibrium from the light bulb plasmas, but since they didn't work out, I loaded an old D2 I-mode shot: 1100910022 which had H89~1.5 w/ 4 MW of RF and PRAD ~ 1.5 MW at nl04=0.8. Despite similar higher PNET ~ 3 MW at a similar density, we were unable to see any kind of WCM-like activity or H89 > 1.0. We started getting too much heat on the limiter so I moved up to higher density but that resulted in MARFEs that troubled the last few shots.

Entered: Dec 6 2010 01:12:28:270PM

Author: Jim Terry

Summary for the 2nd-half of 1101203: This half-run was aimed at development of the capability to measure heat loads during disruptions. Development was needed for the IR camera as well as being able to explore whether variations in thermal and magnetic stored energy lead to significant changes in heat loads. In pursuit of the IR camera development data was acquired with both the standard image size, leading to 2.6 ms resolution, and smaller image size allowing of order 1 ms time resolution. The achievement of the faster time resolution concurrent with the disruptions was successful for a range of disruptions. This will allow the next step - determining if the images can be stabilized for smaller image size through a disruption. With regard to the other goal - developing a range of thermal and stored energies we were also successful - thermal energies from 50-close to 150 kJ were achieved. The plasma current was also varied from 0.8 to 1.1 MA - corresponding to a roughly (1.1/0.8)2, or 1.9x, change in magnetic energy. summary of disruption shots The disruption time for the following shots (which went) was typically 1.12 s. shot Wp(kJ) Ip IR image IR cam int time(us) "flash" frame # 019 47 1.1 full 100 427 no saturation 021 fizzle 022 41 1.1 camera time base corrupted 024 49 1.1 sub 100 1204 no sat. 025 46 1.1 sub 100 1202 no sat. 026 91 (RF) 1.1 sub 100 1199 slight sat. 027 109 (RF) 1.1 sub 100 1203 slight sat. 028 130 (RF) 1.1 no camera trigger 029 150 (RF) 1.1 no camera trigger 030 157 (RF) 1.1 sub 100 1040 flash frame is sat. 031 fizzle 032 116 (RF) 1.1 sub 100 1167 no sat. 033 121 (RF) 0.8 sub 100 1134 no sat.

Physics Operator Summaries

Entered: Dec 4 2010 07:43:12:640PM

Author: Syunichi Shiraiwa

PO Summary for 1101203 (Fri.) MP 534: Foil/AXUV Bolometer Calibration in Helium MP ???: Determination of disruption heat-flux onto the outer divertor targets with high (i.e. 1 ms) time resolution. Session leader: M. Reinke (1st) B. Lipschultz/J. Terry (2nd) Physics operator: S. Shiraiwa Today, the machine ran very well, though there were a couple of mistake made by PO (Shot 1, 2, 12, and 19, see also SL-summary fro example) . First session was for the bolometry cross-calibration but also piggy back tasks which needs He main ion. outer gap scans for HIREXSR calibration, attempt to create He I-mode, and LHCD for He. For the second half, VDE was created by pulling plasmas first by 1cm and then ( 5ms later) turn-off vertical position control (setting three PID gains to be zero). This procedure made VDE events with a reproducible timing. The discharge next to the disruption tend to do fizzle. But, a decrease of pre-puff to 20ms (no cryo-pump) softened this issue (at least for today's disruptions) Score : Upto ramp-down 7, Disruption 20, Fizzle 5,

Session Leader Comments
Dec 3 2010 09:13:45:533AM	1101203001	Matt Reinke	Repeat of 1090821016 equilibrium but change main-ion to He LH from 0.7-1.0, ~300 kW ICRF from 1.05-1.45 2-3 MW ramp RESULT: rough startup but good fkattop, early Mo injection. LHRF and ICRF both coupled. No L/H transition. NEXT: repeat trying to get full RF, see L/H threshold. Lower the outer strike point ~ 5 mm
Dec 3 2010 09:39:17:053AM	1101203002	Matt Reinke	Trying to tweak the discharge for the fuzz target. LHRF increasing ICRF trying to get steady power RESULT: x-point was mistakenly moved up, got a brief H-mode at 1.17, LH had more power coupled, still a little ratty ICRF. Getting a fast brighntess modulation on the He II monitor during the LH pulse. NEXT: move x-point down 1 cm from 001 (1.5 from 002)
Dec 3 2010 09:52:04:910AM	1101203003	Matt Reinke	Still trying for correct equilribium for fuzz test, trying to get IR camera working. LH at 500 kW, ICRF at 2-3 MW. RESULT: RF still having trouble, IR footprint on a tile crack. LHRF seems to love helium. NEXT: Adjust J/D/E mix to get steady 2-3 MW, move strike point down another 15 mm. Increase LHRF power.
Dec 3 2010 10:07:33:810AM	1101203004	Matt Reinke	Still trying for correct equilribium for fuzz test. LH at 800 kW, ICRF at 2-3 MW. RESULT: L/H threshold at 2.5 MW at t=1.3 sec. LH still loves it. NEXT: Move x-point inward 1 cm to try and push strike down a bit more. Increase nl04 target to 1.3 to try and push L/H threshold up.
Dec 3 2010 10:18:33:723AM	1101203005	Matt Reinke	Still trying for correct equilribium for fuzz test. Increase target density. LH at 800 kW, ICRF at 2-3 MW. RESULT: W injection during LHRF kills the plasma. NEXT: Turn LH off, undo strike point change from 005.
Dec 3 2010 10:32:11:433AM	1101203006	Matt Reinke	Repeat equilibrium from 004 but keep target nl04 at 1.2 LH off, ICRF at 2-3 MW ramp RESULT: Steady ICRF w/o D (1.5-2.25 MW) NEXT: Move to (2) USN, Ar seeded ICRF heated
Dec 3 2010 10:47:33:573AM	1101203007	Matt Reinke	Moving on to bolometry calibration shot. 1100720015. Have ICRF steady from 0.5-1.5 at 2.5 MW (D+E). Have B-SIDE-LOWER puff from 0.4-1.3. RESULT: Full length shot, no D-PORT (Lin says due to field). Bt was still at 6.0 from loaded shot. PRAD_MAIN < 1 MW. NEXT: Bt to 5.4 and repeat.
Dec 3 2010 11:02:16:400AM	1101203008	Matt Reinke	Moving to higher ICRF power w/ Bt @ 5.4 RESULT: Steady RF at 2.5 MW, PRAD main still too low. Red spot on K-LIM. NEXT: Increase Ar (3.7 psi in plenum, PG1 to 60 V). Increase ICRF power to 3 MW.
Dec 3 2010 11:22:18:807AM	1101203009	Matt Reinke	Higher ICRF power, more Ar. Put ICRF into ramp down to help with disruption. Not that big a deal at 0.8 MA, but if going up in Ip for I-modes, we'll want a full rampdown. RESULT: PRAD has a break in slope after 1.0 sec (Mo) rises cools the edge. Density is way above target. Limiters even hotter on this one. NEXT: Increase right gap to help move power from limiters (maybe?). Increase Ar and ICRF.
Dec 3 2010 11:39:11:537AM	1101203010	Matt Reinke	Increasing Ar, ICRF and outer gap to try to find the light bulb. RESULT: Get a MARFE at 0.74 which raises the radiation and kills the shot. Still getting high heating on K-LIM despite larger gap. Not working as planned... NEXT: Move to outergap scan (3). B-SIDE LOWER to 50 V from 0.4-0.5. No ICRF.
Dec 3 2010 12:03:09:460PM	1101203011	Matt Reinke	Large outergap scan for HIREXSR calibration. RESULT: Great got 15 cm of gap scan. NEXT: Move to an I-mode target (4) w/ seeding (1100910022 w/ no LH). Ar puff at 0.3-1.0 @ 30 V
Dec 3 2010 12:01:09:620PM	1101203012	Matt Reinke	The target for the light bulbs wasn't working at all, so move to an I-mode target and try to optimize seeding there. 4 MW ICRF - 0.5 sec pulse but large Ar seeding. RESULT: Physop error kept the Ip from 011 (gap scan) somehow. Probably set a record for outergap distance for ICRF operation NEXT: Do what we intended for 12..for reals this time.
Dec 3 2010 12:19:30:043PM	1101203013	Matt Reinke	I-mode target and try to optimize seeding there. 4 MW ICRF - 0.5 sec pulse but large Ar seeding. RESULTS: Late disruption due to too much Ar. ICRF works fine, nl04 over target, getting some density from ICRF. P_NET is about the same as 1100910022 but solid H89=1.0. NEXT: Repeat with lower Ar. 1.5 psi in B-SIDE lower.
Dec 3 2010 12:29:48:430PM	1101203014	Matt Reinke	Repeat of 013 but w/ less Ar. RESULT: Density still overshooting I think the feedback control can be tweaked to help stop this. PRAD a little higher, but Mo x2 higher, Ar x10 lower. KLIM deltaT increases from 150 to 250 degC. Still solid L-mode. NEXT: Adjust He gas feedback, shorten RF length (0.6-1.0), increase RF power to 5 MW. Increase Ar (PG1 to 70 V)
Dec 3 2010 12:47:17:270PM	1101203015	Matt Reinke	More RF, lower density, more Ar RESULT: Density undershoots, is 0.6 at ICRF turn on. Mo way up, KLIM energy flux WAY up. This is not good. NEXT: Increase nl04 target to 1.0.
Dec 3 2010 01:01:27:033PM	1101203016	Matt Reinke	Higher target density RESULT: Density overshoots, strong MARFE after 0.5 when Ar increases quickly leading to disruption. nl04 gets to 1.5x10^20. At least no heat on the limiters... NEXT: Move Ar puff to 0.4-0.5
Dec 3 2010 01:13:13:570PM	1101203017	Matt Reinke	Reduce Ar, hopefully give more time for ICRF to heat and prevent MARFE. RESULT: MARFE still affecting density control. KLIM energy flux back under control. NEXT: Adjust feedback of He fueling to try and get better density control.
Dec 3 2010 01:27:07:047PM	1101203018	Matt Reinke	Steve suggesting many density feedback changes to help w/ control RESULT: Still crazy MARFE NEXT: Switch to PM miniproposal
Dec 3 2010 02:25:53:707PM	1101203020	Bruce Lipschultz	Disruption as programmed at 1.1 MA and nl04=0.8. Strike point on tile 4 beforehand.IR camera in full frame view. Next shot switch to narrower view and longer integration time (vut faster framing time).
Dec 3 2010 02:46:14:040PM	1101203022	Bruce Lipschultz	good disruption but some issues with camera timing. Repeat
Dec 3 2010 03:15:36:820PM	1101203023	Bruce Lipschultz	fizzle
Dec 3 2010 03:17:07:663PM	1101203024	Bruce Lipschultz	good disruption, good data. toroidal stripes on the IR view possibly indicating 'homoclinic tangles' according to B. LaBombard.
Dec 3 2010 03:25:47:987PM	1101203025	Bruce Lipschultz	good disruption, good data. toroidal stripes on the IR again.
Dec 3 2010 03:37:58:803PM	1101203026	Bruce Lipschultz	good disruption, good data. ELM free H-modes, 100 kJ (50 kJ during previous Ohmic shots).
Dec 3 2010 03:50:08:900PM	1101203027	Bruce Lipschultz	good disruption, good data. ELM free H-modes, 100 kJ 3.5MW for ELM-free H-mode at disruption. Next shot raise the density.
Dec 3 2010 04:45:18:960PM	1101203028	Bruce Lipschultz	good disruption, problems with IR camera. ELM free H-modes, 130 kJ 3.0MW for ELM-free H-mode at disruption.
Dec 3 2010 04:46:19:020PM	1101203029	Bruce Lipschultz	good disruption, no camera data. ELM free H-modes, 150 kJ peak, 130 at disruption using 4.0MW for ELM-free H-mode.
Dec 3 2010 04:40:07:050PM	1101203030	Bruce Lipschultz	good disruption, good data. ELM free H-modes, 130kJ at disruption using 4.0MW for ELM-free H-mode.
Dec 3 2010 04:44:20:820PM	1101203031	Bruce Lipschultz	fizzle
Dec 3 2010 04:58:21:297PM	1101203032	Bruce Lipschultz	H-mode but RF faulting - 130 kJ, IR data ok. Next shot try for lower current and density.
Dec 3 2010 05:23:54:103PM	1101203033	Bruce Lipschultz	H-mode 120 kJ, IR data ok. 800 kA, nl04=0.8.

Physics Operator Comments
Dec 3 2010 08:42:43:790AM	1101203001	Syunichi Shiraiwa	Load 1090821016
Dec 3 2010 09:40:50:047AM	1101203002	Syunichi Shiraiwa	Reload 1101202030 for all segment reload 1090821016 into the segment 2 update magnetic signal coeff. move lower X point up by 5 mm ( <- PO's mistake) Next: move lower X point down by 15 mm
Dec 3 2010 09:53:21:150AM	1101203003	Syunichi Shiraiwa	X point moves by 10mm from shot 2. Next: moves X point lower by another 15 mm
Dec 3 2010 10:07:15:223AM	1101203004	Syunichi Shiraiwa	X point did not move much Next moves lower X inward by 10 mm, raise target density to 1.3e19
Dec 3 2010 10:17:15:533AM	1101203005	Syunichi Shiraiwa	Disrupted (Injection at 0.9s) X point moved 1cm inward. Next :
Dec 3 2010 10:20:33:747AM	1101203005	Syunichi Shiraiwa	Disrupted (Injection at 0.9s) X point moved 1cm inward. Next : LH off. Same density as shot 5 and same X point as shot 4
Dec 3 2010 10:29:49:770AM	1101203006	Syunichi Shiraiwa	Full length Next : Load 1100720015
Dec 3 2010 10:36:01:677AM	1101203006	Syunichi Shiraiwa	Full length Next : Load 1100720015, Increase pre-puff 50ms for USN. Cryoon, PG1 enabled. B-SIDE-LOWER steady puff from 0.4-1.3
Dec 3 2010 10:51:36:763AM	1101203007	Syunichi Shiraiwa	TF field was wrong. Early X-ray Next : set to 5.4 T and increase pre-puff from 50 ms to 55ms
Dec 3 2010 11:02:16:553AM	1101203008	Syunichi Shiraiwa	Full length. 5.4 T this time. Next : Increase Ar. (Increase PG1 pressure from 1.5 to 4 psi.) Change PG1 voltage from 100V to 60V Put ICRF power near the end of pulse to help avoiding disruption
Dec 3 2010 11:21:23:530AM	1101203009	Syunichi Shiraiwa	Disrupted at 1.3 s Next : Rcur reduce by 2mm to increase the outer gap to 2cm from 1.6cm Set PG1 to 100V
Dec 3 2010 11:48:00:863AM	1101203010	Syunichi Shiraiwa	Disrupted at 1.0 s. Right gap moved by roughly 4mm. Moving to part 3. Load 1100720026 Seg 3 to Seg 4. Decrease pre-puff since the next is Cryo-off Change PG1 50V from 0.4 to 0.5 s
Dec 3 2010 11:54:48:853AM	1101203011	Syunichi Shiraiwa	Full length. Good outer gap scan. Nest : Cryo-pump on (pre-puff increased) Load 1100910022 seg 2 to seg. 2 PG1 30V from 0.3 to 1.0s
Dec 3 2010 12:03:31:527PM	1101203012	Syunichi Shiraiwa	PO mistake. Shot was not loaded correctly.... Next : What is planned for shot 11.
Dec 3 2010 12:20:54:100PM	1101203013	Syunichi Shiraiwa	Disrupted at 1.3 s Next : Change Bside Lower Pressure. No change in PCS
Dec 3 2010 12:30:49:390PM	1101203014	Syunichi Shiraiwa	Full length Next: Reduce the density demands around 0.3 s Increase PG1 to 70V
Dec 3 2010 12:47:49:777PM	1101203015	Syunichi Shiraiwa	Disurpted at 1.25 s Next : Set target density at 1.0e20m^-3
Dec 3 2010 01:02:56:147PM	1101203016	Syunichi Shiraiwa	Disrupted at 0.63 s Next : Change B-side lower. 70V from 0.4s to 0.5 s Increase density feedback gain
Dec 4 2010 03:16:43:443PM	1101203017	Syunichi Shiraiwa	Disrupted to 1.05 s Next : move to the second session. Load 1100824029 and change to a constant RXL = -0.005 Pre-puff 25ms, Cryo-off fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill B-side lower with 1.5 psi Ar Hybrid DISABLED(PG1)
Dec 3 2010 02:10:12:117PM	1101203019	Syunichi Shiraiwa	PO mistake. Bt request was 6T instead of 5.4T
Dec 3 2010 02:23:22:540PM	1101203020	Syunichi Shiraiwa	Disrupted at 1.12 s Early run-away. Increase pre-puff by 3ms (25-> 27ms)
Dec 3 2010 02:28:54:600PM	1101203021	Syunichi Shiraiwa	Fizzle
Dec 3 2010 02:46:17:050PM	1101203022	Syunichi Shiraiwa	Disruption at 1.115s Next : pre-puff 24ms (-1ms from this shot)
Dec 3 2010 02:54:11:640PM	1101203023	Syunichi Shiraiwa	Fizzle Next : pre-puff 25ms
Dec 3 2010 03:13:24:650PM	1101203024	Syunichi Shiraiwa	Disrupted at 1.115s Next: Pre-puff 20ms
Dec 3 2010 03:18:03:523PM	1101203025	Syunichi Shiraiwa	Disrupted at 1.115s Next: Pre-puff 20ms
Dec 3 2010 03:31:11:283PM	1101203026	Syunichi Shiraiwa	Disrupted at 1.115s Next: Pre-puff 20ms
Dec 3 2010 03:48:35:127PM	1101203027	Syunichi Shiraiwa	Disrupted at 1.12 s Next: Pre-puff 20ms. Increase ne0 to 1.1 from 0.8e20
Dec 3 2010 04:03:13:120PM	1101203028	Syunichi Shiraiwa	Disrupted at 1.12 s Density 1.0-1.1e20 Next: Pre-puff 20ms.
Dec 3 2010 04:16:54:083PM	1101203029	Syunichi Shiraiwa	Same as before. Next: Repeat Pre-puff 20ms.
Dec 3 2010 04:29:54:730PM	1101203030	Syunichi Shiraiwa	Same as before. Next: Pre-puff 20ms. No change in PCS. RF power will be increased.
Dec 3 2010 04:42:17:750PM	1101203031	Syunichi Shiraiwa	Fizzle Next : Prepuff 25 ms
Dec 3 2010 04:59:52:590PM	1101203032	Syunichi Shiraiwa	Normal disruption Next :prepuff 20ms, 800 kA, ne0 demand =0.75e19
Dec 3 2010 05:10:27:280PM	1101203033	Syunichi Shiraiwa	Start up OK. Density and Ip as programmed. Disrupted at 1.128 s This is the last shot.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:02:49:113AM	Plasma	Ok
2	09:27:32:103AM	Plasma	Ok
3	09:42:50:360AM	Plasma	Ok
4	09:57:47:927AM	Plasma	Ok
5	10:11:19:907AM	Plasma	Ok
6	10:24:42:053AM	Plasma	Ok
7	10:37:35:793AM	Plasma	Ok
8	10:52:49:373AM	Plasma	Ok
9	11:09:09:757AM	Plasma	Ok
10	11:23:15:177AM	Plasma	Ok
11	11:41:36:020AM	Plasma	Ok
12	11:55:24:540AM	Plasma	Ok
13	12:07:54:803PM	Plasma	Ok
14	12:20:47:087PM	Plasma	Ok
15	12:35:57:883PM	Plasma	Ok
16	12:50:08:870PM	Plasma	Ok
17	01:04:03:257PM	Plasma	Ok
18	01:23:45:527PM	Plasma	Ok
19	01:53:02:360PM	Plasma	Ok
20	02:09:26:703PM	Plasma	Ok
21	02:23:43:910PM	Plasma	Ok
22	02:36:59:150PM	Plasma	Ok
23	02:49:31:077PM	Plasma	Ok
24	03:02:05:307PM	Plasma	Ok
25	03:14:50:907PM	Plasma	Ok
26	03:27:25:570PM	Plasma	Ok
27	03:40:32:530PM	Plasma	Ok
28	03:58:32:997PM	Plasma	Ok
29	04:11:27:000PM	Plasma	Ok
30	04:25:00:287PM	Plasma	Ok
31	04:39:22:423PM	Plasma	Ok
32	04:52:26:127PM	Plasma	Ok
33	05:06:01:290PM	Plasma	Ok

System Availability

Dec 3 2010 09:02:32:247AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes BES system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (D+F) working. All midplane and off-midplane diode arrays working except WB1AX. Midplane foils calibrated and PRAD_MAIN is being filled. Divertor/Ledge foils not yet ready. Jul 15 2010 08:27AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Nov 16 2010 02:36PM (dekow) Jim Irby Boronization dekow,irby CNPA yes Multiple channel CNPA available Oct 21 2010 07:11PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Shut down. Helium dewar removed. LN2 manual valve and solenoid valves are closed and tagged. Apr 06 2010 10:51AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes Wide-view CXRS system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes system is aligned; new calibrations (relative brightness and position) not yet implemented Jun 29 2010 10:27AM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation yes operational, but turned off Nov 03 2009 04:59PM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 06 2007 10:50AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 06 2007 10:51AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DNB no in test mode only Nov 03 2009 05:01PM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung ECDC yes Operational Jun 26 2010 09:28PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes All channels working and calibrated. Oct 27 2010 03:41PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauges are operational. Jun 28 2010 08:02PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no Plugs for Power Supply and Controls have been unplugged and red tagged making system safe for In-Vessel Access. Apr 05 2010 11:18AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes operating normally Jun 29 2010 10:26AM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Jun 26 2010 11:19PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36PM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes System installed and aligned. Inverted profiles are still not available. Jul 22 2010 08:41AM (ypodpaly) John Rice High Resolution X-Ray ince,rice,ypodpaly HXR yes 32 Channels operational Oct 23 2010 01:41PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna yes system checked out ok on 11006728. Jun 28 2010 04:57PM (ylin) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes system checked out ok on 1100628 Jun 28 2010 04:57PM (ylin) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes system checked out ok. conditioned to vacuum. Jun 28 2010 04:58PM (ylin) Steve Wukitch J-port antenna wukitch,ylin Laser Blow-Off yes operational and tested Jul 20 2010 04:42PM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid yes LH working. New directional couplers installed at input to each klystron. Oct 21 2010 11:42AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer yes 50GHz: up-, 60 GHz up- and down- Oct 21 2010 11:31AM (sgbaek) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek Lower Hybrid SOL reflectometer yes differential phase (profile) working since 8/27/2010. full phase (fluctuations + profile) is not. If put on a miniproposal, please request LH launcher to be moved in Oct 05 2010 11:26AM (cornwall) Cornwall Lau Lower Hybrid SOL reflectometer cornwall,wukitch,ylin LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha no WB4LY and LLY working but not during ICRF. WB1LY not attached due to pickup problems. LYMID attached but have profile problems. Aug 24 2010 09:17AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Spectra being collected and tree filled. Wavelength scan is broken so fixed on the Mo XXXI and XXXII lines. Jul 15 2010 08:28AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes Gauges are operational Jun 28 2010 08:02PM (labombard) Brian LaBombard Baratron pressure gauges labombard MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE no As of 6/10/09, MSE is calibrated & ready to go. Awaiting DNB. Jun 10 2009 10:34AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes All systems are on and functional Jun 29 2010 12:56PM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes PMT Neuts_hards, ssd_x01, ssd_x02, ssd_x03 Jun 26 2010 09:21PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA no Capillaries tested in-vessel. Jun 28 2010 08:08PM (labombard) Brian LaBombard NINJA gas puff labombard,terry PCI no Down due to broken laser shutter. Nov 22 2010 10:44AM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,ennever,ntsujii,porkolab Penning Gauges no High voltage power supplies are turned off, waiting for work at A-port horizontal to be finished. Jun 28 2010 08:07PM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Jun 26 2010 11:19PM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes   Jun 26 2010 11:19PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Jun 26 2010 11:19PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Jun 26 2010 11:20PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational. Jun 28 2010 08:03PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational. Jun 28 2010 08:03PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes F and J outer divertor probes are operational. Jun 28 2010 08:04PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Operational, except probe#13 Jun 28 2010 08:04PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes As of 1101123, the 60, 88u, 88l, 140 and variable set at 115GHz are operational. The 50, 75 and 112 are nonoperational. On 1101123, the noise band at ~200kHz is again seen on the 88u and 88l channels. Nov 23 2010 09:30AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Operational. New Langmuir-Mach probe head installed. Jun 28 2010 08:05PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. Jun 28 2010 08:05PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes Both A and K units are operational. Coil polarity needs to be checked. Jun 28 2010 08:06PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Sparker yes HV supply on, cable run to sparker at k-hor Jun 23 2010 02:41PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station yes SSS installed and leak tested. Oct 21 2010 11:31AM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes No new CO2 detector, so still missing edge channels Jun 23 2010 02:40PM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with 2 lasers Oct 22 2010 01:06PM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma TS - Edge yes Operational Jul 14 2010 11:54AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XEUS yes Operational. Raw spectra stored but not line brightness time histories are going into the tree yet. Aug 24 2010 09:17AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer mlreinke XTOMO yes Core system working. Edge system waiting for H-modes. Jul 01 2010 11:55AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke