Miniproposals

Miniproposal: 651 Date Filed: 3/2/2011 Title: Investigation of limiter heat loads during ICRF First Author: Steve Wukitch Session Leader: Matt Reinke (shots 31-34)

Miniproposal: 679 Date Filed: 11/28/2011 Title: Investigation of zonal flows and interaction with energetic particle induced geodesic acoustic modes First Author: David Pace Session Leader: David Pace (shots 1-30)

Engineering Operator Run Comment

Investigation of zonal flows and interaction with energetic particle ind

Session Leader Plans

Entered: Feb 23 2012 05:13:35:683PM

Author: David Pace

MP679: Investigation of zonal flows and interaction with energetic particle induced geodesic acoustic modes Objective: The goal of this experiment is to conclusively identify any relationship between zonal flows and geodesic acoustic modes (GAMs), including the possibility of an energetic particle-induced GAM. This will be accomplished by reproducing the unique GAM feature from a past experiment, and then determining its stability through modification of the ion cyclotron resonance heating (ICRH) tail ion distribution. Experimental Team: PhysOp - J. Hughes ICRF - Y. Lin GPI - J. Terry and S. Zweben Thomson - J. Walk HiREX-SR/AXUV - M. Reinke Advisors - S. Wolfe and Y. Ma Polarimeter - W. Bergerson, D. Brower, and X. Peng CECE - A. White and C. Sung Edge CXRS - B. Lipschultz and M. Churchill Face in Control Room - D. Pace Fast TCI - J. Irby and C. Kasten Reflectometer - S. Baek Edge Ti Probes - D. Brunner and B. Labombard PCI - E. Davis CNPA - I. Faust Special Setup: 10 psi 4He in the NINJA plenum Backup Plan: If we are unable to produce the desired GAM-like feature, then Ma will take over as Session Leader to run strike point sweeps as part of an L-H transition experiment. These plasmas will begin with the discharges as developed throughout the day. Diagnostic Gas Puffing Priorities: We have three diagnostic systems that require an independent gas puff. In order to control (or reproduce) the resulting density perturbation from these puffs, we will operate the systems according to the following priority. (1) GPI at outer midplane (2) X-point GPI (3) Edge CXRS The standard GPI (system 1) is absolutely required. If the perturbation of the additional gas puff for the X-point GPI is acceptable, then we will try to add a third puff for the Edge CXRS. Between-shot Analysis: We will identify the GAM feature by looking for coherent fluctuations in the f < 10 kHz range on a variety of diagnostics. The Mirnov coils and GPI photodiodes provide immediate feedback. Other fluctuation diagnostics will are similarly capable of identifying such a feature. Run Plan: (1) Reference Discharges: 3-5 shots (1a) Reproduce shot 1120223034 (final shot from previous day) - all parameters, including ICRH power ramp, reproduced from this shot - this reference did not use the cryopump, but we will use the cryopump (1b) Reproduce shot 1110114032 - B = 4.6 T, Ip = 0.9 MA, n_e,bar = 7 x 10^19 m^-3, LSN - all parameters reproduced (2) RF Power Scan: 5-8 shots - If shot 1a is deemed valuable -> shot 3a - if shot 1a is undesirable -> shot 3b (2a) Setup shot 2a - if NO L-H transition in 2a, then extend RF power ramp to higher values - if L-H transition in 2a, then slow/decrease the RF power ramp (2b) Begin with setup of shot 2a, but adjust to B = 6.1 T and Ip = 1.15 MA - if NO L-H transition in 2a, then extend RF power ramp to higher values - if L-H transition in 2a, then slow/decrease the RF power ramp (3) GPI Acquisition of ICRH Turn-off: 1-2 shots - Begin with shot parameters from section 3 - ICRH begins before the GPI camera, maintains flattop power at a level determined from step 3 - The ICRH turns off in the middle of the GPI camera acquisition (timing determined by Terry) (4) GPI Acquisition of ICRH Turn-on: 1-2 shots - Begin with shot parameters from section 4 - ICRH turns on (as sharply as possible) in the middle of the GPI camera acquisition (5) Density Alteration to Avoid L-H Transition: 2-4 shots - Begin with shot parameters from section 5 - program RF power ramp as used in section 1, or developed thus far - adjust density programming based on Ma/Hughes assessment of the best way to avoid an L-H transition (6) Density Alteration to Achieve L-H Transition: 2-4 shots - Begin with shot parameters from section 5 - program RF power ramp as used in section 1, or developed thus far - adjust density programming based on Ma/Hughes assessment of the best way to achieve an L-H transition (7) Items of Interest: 5 shots - Revisit most intriguing shot of the day (7a) extend RF power to higher/lower levels (7b) extend density to higher/lower values (8) HiREX-SR Calibration: 1-2 shots - reference shot to be determined - last time, we used 1120207021, segment 3

Physics Operators Plans

Entered: Feb 23 2012 05:34:01:337PM

Author: Jerry Hughes

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120209 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 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi He enabled Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus, LoWEUS 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, all transmitters ready for 1st shot LH(yes/no): no Cryopump (yes/no): yes, ready for first shot DNB (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s ------------------ Setting up: Load from 1120209004. Import seg1 from 1120223001 into seg1. Seg2 has a 80ms Ar puff from PG1. nl04 programmed to 4e19. Save in /home/jwhughes/physop/pcs_scratch as 1120224666. Next import seg2 of 1110114032 into seg3. Need to recalculate magnetics predictors. Calling all predictor algorithms in this segment. In Custom EF2_BY_EF4 predictor, set weights of EF2_U:BUS_R_CUR=0.5, EF2_U:BUS_R_CUR=0.5 In Custom NL04 predictor, set weight of NL04=1.0 Build all. Save in /home/jwhughes/physop/pcs_scratch/ as 1120224667. Set PG1 puff in Seg3 to 80ms to match that in Seg2. Finally, need a locked mode calibration shot for Hirex. Reinke recommends 1120221006. Seg2 is active in this shot. Import this segment into seg4 of the working shot. Build all. Save in /home/jwhughes/physop/pcs_scratch/ as 1120224668. 17:12 update: Now SLs want to begin tomorrow with a repeat of the last shot from today. Only difference is they still want the cryo on. So, keep seg1 unchanged and import seg2 from 1120223034 into seg2. Zero out PG5 pulse in seg2 and seg3. Load at 23-Feb-2012 17:33:38.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Ready for first shot. To summarize, I am beginning with: Seg1: Cryopump startup from beginning of previous day's run (ON) Seg2: Reproduces 1120223034 (ON) Seg3: Reproduces 1110114032 (off) Seg4: Locked mode shot (off)

Session Leader Summaries

Entered: Feb 24 2012 05:19:53:570PM

Author: Matt Reinke

We got a few shots of MP 651 in to look at G/H limiter heating. We successfully repeated 1120221014 (shot 033) and put significant heat flux on the limiter midplane. The current was lowered to 600 kA on 034 and while the input RF energy was less due to RF trips, the limiter energy flux increased.

Entered: Feb 24 2012 05:21:37:883PM

Author: David Pace

This was an excellent run day. Tokamak operations were reliable across the parameter range extending from 4.6 < Bt [T] < 6.1. We received 30 discharges, of which one was utilized as a locked mode calibration shot for the HiREX-SR system. The operations group and Physics Operator are superb. A possible source for the 3 kHz fluctuation was identified as related to the EF power supply. This chopper reaches a peak frequency of 3 kHz, which is clearly visible in the operations traces. Various diagnostics that are immune to cell noise, including the GPI camera, observe fluctuations at this frequency, indicating that there may be a driven plasma response. The divertor probes and reflectometer observe a coherent feature that changes in frequency across RF pulses and L-H transitions. The GPI camera acquired excellent measurements across multiple L-H transitions. Reproducible transitions were achieved by setting up a high power RF trace and positioning the GPI camera across this turn-on. We should not use RF power ramps if the goal is to observe the transition (because the GPI camera has a limited acquisition window). In at least one case, the GPI camera observations do not show a significant change in fluctuation behavior across the L-H transition. Transitions were observed at both 4.6 and 5.4 T.

Physics Operator Summaries

Entered: Feb 24 2012 05:30:37:407PM

Author: Jerry Hughes

The machine ran admirably well today. The cryopump was on for every shot, and startups were on average very good. Many SL changes were requested throughout the day, and these were executed without incident. I switched a lot between active segments 2,3 and 4, so future POs be careful when trying to reload any of these from today. The first shot was taken at 8:59 and the last shot (34) at 17:08. The only significant between-shot delay came from a frozen-over valve on the cryopump which had to be unstuck using a cell access. There were also some short delays from 3 or 4 unexplained hangs during INIT, and from a hung digitizer store event at 5pm. Session leaders were generally happy. Most of the run supported MP 679, and a lot of good data was obtained for this study of zonal flow activity around the L-H transition. The discharges should also help support MP673, which didn't get a lot of good shots yesterday. The last hour or so today was spent on MP 651 and involved heating up the GH limiter by running high power at low density and current. I'll leave this to the SL to justify. Stats: 30/34 plasmas into rampdown 3/34 early disruptions 1/34 fizzles

Session Leader Comments
Feb 24 2012 09:03:50:157AM	1120224001	David Pace	Thank you for participating in today's experiment! We will begin with a repeat of the final shot from yesterday, 1120223034. Turn your eyes low, low, to the f < 10 kHz range to look for coherent fluctuations leading up to the L-H transition. Shot 001 Plan: get plasma Shot 001 Actuality: got plasma
Feb 24 2012 09:17:15:100AM	1120224002	David Pace	Shot 002 Plan: Begin with shot 001, but reduce the RF power in an attempt to delay the L-H transition such that it occurs within the GPI acquisition. Shot 002 Actuality: The L-H transition occurred later in time, as desired.
Feb 24 2012 09:35:31:633AM	1120224003	David Pace	Shot 003 Plan: Begin with shot 002, then move the strike point out of the slot. Shot 003 Actuality: L-H transition delayed significantly. Control Room experts note this is expected from the strike point adjustment and the increased argon (HiREX-SR).
Feb 24 2012 09:42:40:803AM	1120224004	David Pace	Shot 004 Plan: Increase RF power to get earlier H-mode. Shot 004 Actuality: excellent shot, many H-modes.
Feb 24 2012 10:05:22:493AM	1120224005	David Pace	Shot 005 Plan: Repeat shot 004 Shot 005 Actuality: Good shot, GPI operators would like to see this again.
Feb 24 2012 10:24:11:013AM	1120224006	David Pace	Shot 006 Plan: repeat shot 005 Shot 006 Actuality: good shot
Feb 24 2012 10:24:48:457AM	1120224007	David Pace	Shot 007 Plan: repeat shot 006 for GPI optimization Shot 007 Actuality: disruption shortly after injection.
Feb 24 2012 10:36:55:813AM	1120224008	David Pace	Shot 008 Plan: repeat shot 007 for GPI optimization, remove disruption Shot 008 Actuality: good shot, GPI is satisfied
Feb 24 2012 10:56:43:813AM	1120224009	David Pace	Shot 009 Plan: reproduce shot 1110114032 * B = 4.6 T, Ip = 0.9 MA, n_e,bar = 7 x 10^19 m^-3, LSN * We acknowledge that this will significantly reduce ECE coverage. It is entirely our own fault. Shot 009 Actuality: excellent shot, no H-mode. GPI sees larger fluctuation amplitude in the f ~ 3 kHz range.
Feb 24 2012 11:08:52:223AM	1120224010	David Pace	Shot 010 Plan: reproduce shot 009, but with increased RF power We acknowledge that this will significantly reduce ECE coverage. It is entirely our own fault. Shot 010 Actuality: Excellent RF performance. Additional power seems to mostly end up as impurity radiation.
Feb 24 2012 11:30:07:237AM	1120224011	David Pace	Shot 011 Plan: begin with shot 010 parameters, then INCREASE Bt to 6.1 T and Ip to 1.15 MA. We acknowledge that this will significantly improve ECE coverage. Shot 011 Actuality: good shot, fast edge light diagnostics see pulses with a period equivalent to 3 kHz.
Feb 24 2012 11:30:38:490AM	1120224012	David Pace	Shot 012 Plan: begin with shot 011 parameters, then decrease Ip to 0.95 MA Shot 012 Actuality:
Feb 24 2012 11:53:53:180AM	1120224013	David Pace	Shot 013 Plan: begin with shot 012, begin RF at max power at 0.75 s and it will turn off at 1.0 s. This will allow the GPI to capture the fast changes in edge conditions with the RF turn-on. Shot 013 Actuality: Good shot, captured the RF turn-on with GPI camera. Bursts in fast edge D_alpha grow up slowly following RF turn-on.
Feb 24 2012 12:09:17:347PM	1120224014	David Pace	Shot 014 Plan: repeat shot 013 Shot 014 Actuality: good shot, this completes the GPI acquisition of RF turn-on.
Feb 24 2012 12:32:44:910PM	1120224015	David Pace	Shot 015 Plan: begin with parameters of shot 014, then change, (a) RF turns on at 0.55 s and runs full power until 0.8 s. This allows for a GPI camera acquisition across the shut-off. (b) Later in the shot, each antenna pulses at full power for 100 ms. This provides a characterization of edge light due to each antenna. Shot 015 Actuality: good shot, missed end of RF pulse in GPI camera.
Feb 24 2012 12:34:08:530PM	1120224016	David Pace	Shot 016 Plan: repeat 015 Shot 016 Actuality: good shot, GPI captured RF turn-off at 0.80 s.
Feb 24 2012 12:34:31:170PM	1120224017	David Pace	Shot 017 Plan: locked mode calibration shot Shot 017 Actuality:
Feb 24 2012 01:04:22:863PM	1120224018	David Pace	Shot 018 Plan: repeat shot 1120223001 (yesterday's first shot) in an attempt to get L-H transition at desired GPI time Shot 018 Actuality: PhysOp reports loss of density control followed by incredible gas puffing that led to disruption.
Feb 24 2012 01:30:39:737PM	1120224019	David Pace	Shot 019 Plan: repeat shot 018 Shot 019 Actuality: L-H transition occurred late, not captured by GPI camera.
Feb 24 2012 01:37:56:400PM	1120224020	David Pace	Shot 020 Plan: begin with shot 019, then increase RF power trace to begin at 2 MW Shot 020 Actuality: GPI missed L-H transition, will repeat with GPI timing adjustment.
Feb 24 2012 02:06:50:480PM	1120224021	David Pace	Shot 021 Plan: repeat shot 020, but increase argon for HiREX-SR and adjust GPI camera timing in an attempt to capture the elusive L-H transition Shot 021 Actuality: disruption
Feb 24 2012 02:22:44:743PM	1120224022	David Pace	Shot 022 Plan: try to implement the plan from shot 021 Shot 022 Actuality: interesting H-mode evolution that does not meet the criteria for sharpness. Will try higher power RF without a ramp next.
Feb 24 2012 02:35:05:233PM	1120224023	David Pace	Shot 023 Plan: repeat shot 022, but replace the RF power ramp with a fixed 3 MW input. The goal is to produce the L-H transition nearly immediately, which will ensure GPI capture. Shot 023 Actuality: excellent shot, GPI captured the L-H transition as desired. L-H transition occurred ~0.060 s after the RF turn-on.
Feb 24 2012 02:42:35:617PM	1120224024	David Pace	Shot 024 Plan: repeat shot 023 to improve GPI capture Shot 024 Actuality:
Feb 24 2012 03:02:02:260PM	1120224025	David Pace	Shot 025 Plan: repeat shot 024 to get additional GPI capture Shot 025 Actuality: excellent shot, GPI acquires L-H transition as desired
Feb 24 2012 03:16:59:070PM	1120224026	David Pace	Shot 026 Plan: begin with parameters of shot 025, then go to Bt = 6.1 T and Ip = 1.15 MA. The RF and GPI timing will remain as in shot 025. Shot 026 Actuality: No L-H transition, will leave this field/current because we do not want to devote a repeat shot to a non-H-mode
Feb 24 2012 03:32:28:300PM	1120224027	David Pace	Shot 027 Plan: go to Bt = 4.6 T and Ip = 0.90 MA. The RF and GPI timing will remain as in shot 025. Shot 027 Actuality: no L-H transition
Feb 24 2012 03:44:41:257PM	1120224028	David Pace	Shot 028 Plan: double the density Shot 028 Actuality: no H-mode. Next, we will coerce the plasma with increased RF power
Feb 24 2012 03:56:27:637PM	1120224029	David Pace	Shot 029 Plan: repeat shot 028, increase the RF power to maximum Shot 029 Actuality: excellent shot, L-H transition right in the GPI
Feb 24 2012 04:10:06:570PM	1120224030	David Pace	Shot 030 Plan: repeat shot 029 Shot 030 Actuality: great shot, reliably reproduces L-H transition for GPI
Feb 24 2012 04:25:26:160PM	1120224031	Matt Reinke	Moving to limiter melting tests (MP 651). Repeat 1120221014 which showed substantial limiter temperature rises prior to the runaway even on 1120221022. RESULT: fizzle...apparently I'm Jerry's albatross NEXT: repeat
Feb 24 2012 04:41:55:320PM	1120224032	Matt Reinke	another attempt at repeating 1120221014 RESULT: good target shot but RF timing was still set from 030 NEXT: repeat 800 kA shot w/ full length ICRF
Feb 24 2012 04:53:34:380PM	1120224033	Matt Reinke	800 kA shot, with full length ICRF RESULT: excellent! Yijun says problems with RF data but 3.9 MW flat got in NEXT: repeat but at 600 kA
Feb 24 2012 05:09:54:403PM	1120224034	Matt Reinke	600 kA repeat of previous shot RESULT: didn't get a clean ICRF trace, about 0.5 MJ less NEXT: end of run

Physics Operator Comments
Feb 24 2012 09:06:27:850AM	1120224001	Jerry Hughes	Shot 1. Demand: Repeat of last shot from yesterday, 1120223034, only with cryopump. Result: Goes just into rampdown before disrupting. Looks very similar to target discharge. Startup ok.
Feb 24 2012 09:15:39:883AM	1120224002	Jerry Hughes	Shot 2. No PO changes. Result: Discharge makes it almost all the way down. H-modes triggered later.
Feb 24 2012 09:36:16:613AM	1120224003	Jerry Hughes	Shot 3 PO changes: Increase RXL during flattop by +0.025m in Seg2. Increase ZXL during flattop by +0.005m in Seg2. Increase PG1 puff form 80ms to 125ms in Seg2. Load at 24-Feb-2012 09:22:50.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. Startup ok. Well-delayed L-H transition.
Feb 24 2012 09:43:27:293AM	1120224004	Jerry Hughes	Shot 4. No PO changes. Result: Plasma into rampdown. Higher RF early. H-modes much earlier.
Feb 24 2012 09:55:49:130AM	1120224005	Jerry Hughes	Shot 5. No PO changes. Result: Plasma into rampdown. Early H-modes.
Feb 24 2012 10:16:21:700AM	1120224006	Jerry Hughes	Shot 6. No PO changes Result: Plasma into rampdown. Startup okay. 3 H-modes, first one starting later than before.
Feb 24 2012 10:25:44:213AM	1120224007	Jerry Hughes	Shot 7 No PO changes. There will be a cell access following this shot. Result: Injection at 0.824s, followed by probable locked mode. Disruption at 1s
Feb 24 2012 10:36:03:423AM	1120224008	Jerry Hughes	Shot 8 No PO changes Result: Plasma into rampdown. First H-mode at 1.14s.
Feb 24 2012 10:55:57:630AM	1120224009	Jerry Hughes	Shot 9 PO changes: Turn off seg2. Turn on seg3 (repeat of 1110114032) Adjust PG1 puff in seg3 to match seg2 (80ms-->125ms) Load at 24-Feb-2012 10:40:55.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. Startup ok. Long L-mode phase
Feb 24 2012 11:08:14:460AM	1120224010	Jerry Hughes	Shot 10 No PO changes. Result: Plasma into rampdown.
Feb 24 2012 11:23:38:427AM	1120224011	Jerry Hughes	Shot 11. PO changes: SL requests increase in Bt to 6.1T and Ip to 1.15MA. Keep seg3 active. Set flattop Ip value to -1150000A Set TF to -166000A Request PLC TF current limit raised to 170kA. Load at 24-Feb-2012 11:16:53.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done There will be a cell access after this shot. Result: Plasma into rampdown. Unfortunate injection midway through, but not a shot-killer. No H-modes
Feb 24 2012 11:40:46:697AM	1120224012	Jerry Hughes	Shot 12: PO changes: Reduce Ip to -950000A, per SL request. Load at 24-Feb-2012 11:30:36.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. Another nice long L-mode with fluctuations.
Feb 24 2012 11:49:37:790AM	1120224013	Jerry Hughes	Shot 13 No PO changes. Result: Plasma into rampdown. Shorter RF pulse this time. Nearly 4MW peak ICRF.
Feb 24 2012 12:03:39:227PM	1120224014	Jerry Hughes	Shot 14. No PO changes. Result: Plasma into rampdown. Good repeat of shot 13.
Feb 24 2012 12:22:40:033PM	1120224015	Jerry Hughes	Shot 15 No PO changes. Result: Plasma into rampdown. [D,E,J], then D, E, J.
Feb 24 2012 12:30:11:820PM	1120224016	Jerry Hughes	Shot 16. No PO changes. Result: Plasma into rampdown.
Feb 24 2012 12:44:45:090PM	1120224017	Jerry Hughes	Shot 17. PO changes. SL is ready for locked-mode calibration shot. Turn off seg 3. Turn ON seg4. Load at 24-Feb-2012 12:32:48.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Locked mode.
Feb 24 2012 01:05:34:663PM	1120224018	Jerry Hughes	Shot 18. PO changes: SL wants to repeat shot 1120223001. This is very similar to the existing shot, except for the Bt. Turn off seg4. Turn ON seg2 Import seg2 from 1120223001. Extend Ip flattop to 1.5s. Load at 24-Feb-2012 12:52:11.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: TCI signal cut-out in the middle of the shot, discharge was gassed to death by feedback. Central density nearly tripled before disruption.
Feb 24 2012 01:21:15:203PM	1120224019	Jerry Hughes	Shot 19 No PO changes. Result: Plasma into rampdown. 3 short H-modes late in flattop.
Feb 24 2012 01:36:46:220PM	1120224020	Jerry Hughes	Shot 20. No PO changes Result: Plasma into rampdown.
Feb 24 2012 02:10:52:150PM	1120224021	Jerry Hughes	Shot 21 PO changes: Set PG1 pulse in seg2 from 80 to 125ms, to satisfy Hirex team. Load at 24-Feb-2012 13:39:58.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Delay to try to get the cryopump unstuck. Result: Disruption at 0.71s. Density is probably too low.
Feb 24 2012 02:19:17:433PM	1120224022	Jerry Hughes	Shot 22. PO changes: Raise nl04 program in flattop from 3.5e19 to 4.5e19. Load at 24-Feb-2012 14:12:00.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. good RF ramp with lots of dithering L-H-L.
Feb 24 2012 02:32:30:090PM	1120224023	Jerry Hughes	Shot 23 No PO changes. Result: Plasma into rampdown. Looks like a clean L-H transition.
Feb 24 2012 02:48:45:040PM	1120224024	Jerry Hughes	Shot 24 No PO changes. Result: Plasma to 1.68s. L-H at almost the exact same time.
Feb 24 2012 03:00:51:477PM	1120224025	Jerry Hughes	Shot 25. No PO changes for this shot. Result: Good repeat of 23, 24. Ramps down to 1.93.
Feb 24 2012 03:14:39:487PM	1120224026	Jerry Hughes	Shot 26 PO changes: SL requests 6.1T, 1.15MA In seg2, set TF to -166100A. Set Ip to -1150000A. Load at 24-Feb-2012 15:05:17.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. 1.15MA. 6.0T. L-mode only.
Feb 24 2012 03:27:22:510PM	1120224027	Jerry Hughes	Shot 27. SL wants 4.6T, 0.9MA (as on shot 9) PO changes: TF in seg2 to -125300A. Ip to -900000A. Load at 24-Feb-2012 15:19:52.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. 4.6T. 0.9MA. L-mode.
Feb 24 2012 03:45:08:787PM	1120224028	Jerry Hughes	Shot 28. Proceed to part (7b), I guess? PO changes: Set nl_04 demand to 9e19 in seg2 Load at 24-Feb-2012 15:34:51.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.73s. L-mode.
Feb 24 2012 03:54:27:320PM	1120224029	Jerry Hughes	Shot 29 No PO changes. result: Plasma to 1.82s. 5 little H-modes.
Feb 24 2012 04:10:15:063PM	1120224030	Jerry Hughes	Shot 30. No PO changes. Result: Plasma to 1.70s. 5 little H-modes.
Feb 24 2012 04:24:47:760PM	1120224031	Jerry Hughes	Shot 31. Switching MPs. PO changes: Matt reinke wants repeat of 1120221014. Active segment was 3. Import seg3 from this shot into seg3. Turn off seg2. Turn ON seg3. Load at 24-Feb-2012 16:17:27.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle. But, since David signed out, and we switched MPs before this shot, I consider my no-hitter intact.
Feb 24 2012 04:36:59:950PM	1120224032	Jerry Hughes	Shot 32. No PO changes Result: Plasma into rampdown.
Feb 24 2012 04:52:36:273PM	1120224033	Jerry Hughes	Shot 33. No PO changes Result: Bueno. Plasma into rampdown. 3.9MW of ICRF.
Feb 24 2012 05:09:24:083PM	1120224034	Jerry Hughes	Shot 34 PO changes: Ip to -600000A in seg3 Load at 24-Feb-2012 16:55:23.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown. End of run. Time to warm up.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:55:38:950AM	Plasma	Ok
2	09:08:44:600AM	Plasma	Ok
3	09:24:36:020AM	Plasma	Ok
4	09:37:30:480AM	Plasma	Ok
5	09:52:05:380AM	Plasma	Ok
6	10:05:24:390AM	Plasma	Ok
7	10:18:48:983AM	Plasma	Ok
8	10:33:13:140AM	Plasma	Ok
9	10:46:12:483AM	Plasma	Ok
10	11:01:26:253AM	Plasma	Ok
11	11:17:47:493AM	Plasma	Ok
12	11:31:43:097AM	Plasma	Ok
13	11:45:00:317AM	Plasma	Ok
14	11:58:30:307AM	Plasma	Ok
15	12:11:57:837PM	Plasma	Ok
16	12:26:26:067PM	Plasma	Ok
17	12:40:53:313PM	Plasma	Ok
18	12:55:22:853PM	Plasma	Ok
19	01:17:40:273PM	Plasma	Ok
20	01:31:07:450PM	Plasma	Ok
21	02:00:00:870PM	Plasma	Ok
22	02:13:46:530PM	Plasma	Ok
23	02:27:03:187PM	Plasma	Ok
24	02:43:34:077PM	Plasma	Ok
25	02:57:01:433PM	Plasma	Ok
26	03:09:49:080PM	Plasma	Ok
27	03:23:31:807PM	Plasma	Ok
28	03:37:59:630PM	Plasma	Ok
29	03:51:03:583PM	Plasma	Ok
30	04:06:35:097PM	Plasma	Ok
31	04:20:32:047PM	Plasma	Ok
32	04:33:29:450PM	Plasma	Ok
33	04:46:26:127PM	Plasma	Ok
34	05:04:39:230PM	Plasma	Ok

System Availability

Feb 24 2012 08:55:21:017AM

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 golfit BES yes BES system is online Nov 22 2011 02:21PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes Midplane and LEDGE-AX diodes functioning properly. Midplane bolometers working and calibrated. LEDGE/DIV bolometers working, but toaster calibration not yet complete. Jan 23 2012 12:02PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed. System has been tested and will be ready once bottle is installed Jan 09 2012 06:32AM (dekow) Jim Irby Boronization dekow,irby CECE no   Jan 06 2012 03:48PM  Anne White Correlation ECE whitea CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes Operational. He level meter not working on 500L dewar. Frank will take manual readings. Jan 11 2012 11:46AM (labombard) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard CXRS yes core-CXRS system is online Nov 22 2011 02:21PM (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 11:44AM (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 01 2009 09:45AM (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 05 2011 02:41PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar Disruption Mitigation no gas jet valve disabled on 2011/04/13 Apr 13 2011 02:04PM (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 DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 01 2012 01:24PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte DNB yes   Dec 01 2011 11:46AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung ECDC yes Operational as of 11/19/11 Nov 22 2011 03:01PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE no Power off to RF and IF sections- Power on to DA Apr 11 2011 02:54PM (phillips) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea FTCI no   Jan 06 2012 04:36PM  Jim Irby Fast two-color interferometer irby G-Side Ratiomatic yes   Dec 02 2011 12:24PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no Power supply unplugged and redtagged, HV cables removed Apr 14 2011 08:03AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Using new preamps. Nov 30 2011 07:51AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPC2 yes Dewar cold. Nov 21 2011 09:55AM (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 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes system is functional and taking data Dec 05 2011 02:42PM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Jan 09 2012 06:32AM (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 Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 06 2011 08:21AM (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 12:05PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna no secured Apr 14 2011 08:55AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna no secured Apr 14 2011 08:55AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna no secured Apr 14 2011 08:56AM (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 11:46AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller Laser Blow-Off yes Operational and tested Jan 06 2012 03:50PM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no LH HV Breaker Opened and Tagged, TPS Upgrade Underway Nov 10 2011 03:51PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer no off Apr 15 2011 08:24AM (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. Jan 23 2012 12:03PM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane Lyman-a and LEDGE-LY working normally. New B-PORT Lyman (BPLY) still being debugged. Jan 23 2012 12:04PM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke Magnetics yes   Dec 01 2011 11:51AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe McPherson no **vacuum system problem*** McPherson viewing the 10-14 nm region for molybdenum monitoring. It's days are numbered as LoWEUS has demonstrated superiority. Jan 31 2012 08:15AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry Michelson yes Front end at 4.5e-8 T. Reduced speed for initial operation. Nov 30 2011 07:51AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes   Dec 02 2011 12:27PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland 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 1/3/2011: push-pull mechanism broken. MSE inoperative Jan 03 2012 11:47AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes High voltage is on. We're ready for plasma. Nov 21 2011 12:58PM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA yes C-bottom and new F-bottom system ready. Dec 02 2011 12:28PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland PCI yes Operational. Nov 30 2011 12:45PM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges yes Operational. High voltage comes on during INIT and off at RECOOL. Dec 09 2011 09:48AM (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 yes 3 chords operational but with high noise level Jan 06 2012 04:22PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Jan 09 2012 06:33AM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes   Jan 09 2012 06:33AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Jan 09 2012 06:33AM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Jan 09 2012 06:33AM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational, except for probe #1 (open circuit) and probe #16 (not installed). Dec 09 2011 09:50AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational, except for bottom-D probe (open circuit). Dec 09 2011 09:52AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes F-divertor ok. J-divertor ok, except for JDIV_06 which is shorted out. Dec 09 2011 09:54AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard Probe Array - UDIV yes Operational except for probes #4, 5 and 13 (open) Dec 09 2011 09:56AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes As of 1120105xxx, all channels are connected Jan 05 2012 09:14AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Ion Sensitive Probe head installed. Testing in piggy-back mode. Dec 20 2011 12:33PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. Dec 09 2011 09:57AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes A-port WASP is operational. K-port WASP is dead (all probes melted together). Dec 09 2011 09:58AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Shoelace Antenna yes Fixed frequency operation available (100kHz) at moderate power (< 0.5kW). Otherwise in receiver mode. Jan 11 2012 11:50AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard SOL reflectometer yes c-port waveguides operational, h-port waveguides are not. Nov 29 2011 12:04PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin Sparker yes New Type II sparker replaced Type I on 11/17/2011 Nov 23 2011 08:53AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station no SSS is up to air, no safety issues Apr 14 2011 12:06PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes TCI Operational. Density feedback operational. Nov 10 2011 11:47AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with one 50Hz laser, precise density calibration still required. Feb 22 2012 08:37AM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes System taking data. Requires calibration. Feb 03 2012 04:05AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (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. Jan 23 2012 12:13PM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->4 working normally, ARRAY5 (new core view) working but spatial calibration issues not yet resolved Jan 23 2012 12:13PM (mlreinke) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke