Miniproposals

Miniproposal: 355c Date Filed: 9/2/2011 Title: ICRF Testing and Conditioning, with detection of mode-conversion location First Author: Steve Wukitch Session Leader: Yijun Lin (shots 1-1)

Miniproposal: 669 Date Filed: 10/17/2011 Title: Rotated Antenna Commissioning and Initial Characterization First Author: Steve Wukitch Session Leader: Steve Wukitch (shots 2-34)

Engineering Operator Run Comment

RF conditioning, J with 2 straps

Session Leader Plans

Entered: Dec 15 2011 01:22:07:897PM

Author: Yijun Lin

Session leader plan (minor change from Sl_plan of 1111209): Use vanilla 5.4 T, 0.8 MA discharges *start with 1111209001) to condition D/E and J antennas. Initial discharges will be used to condition J-antenna in its 2-strap configuration to max power in L-mode, and examine its power handling, voltage limit, and impact on SOL density profiles. We will compare J/D/E antennas in terms of heating effectiveness, impurity production and neutral pressure limit. LH-SOL reflectometer will require cell accesses to insert it to reasonable position. GPI will also be utilized to measure SOL turbulence changes with RF.

Entered: Dec 16 2011 08:55:18:553AM

Author: Yijun Lin

FMIT #2 (E-antenna) High voltage did not come up when demanded from the PLC computer. Causes are under investigation. HV came up normally locally, and also came up ok after restarting the PLC computer. Also a delay due to alternator.

Physics Operators Plans

Entered: Dec 15 2011 02:42:24:267PM

Author: Jerry Hughes

Set Up for 16 Dec 2011 MP355C ICRF Testing and Conditioning SL: Y. Lin PO: J. Hughes ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1111209001 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 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 15psi D2 Hybrid DISABLED (PG5) DO NOT fill B-div, Hybrid DISABLED (PG6) DO NOT fill H-div, Hybrid DISABLED (PG7) fill NINJA with 10 psi Ne DISABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus + LoWEUS Z-bolo shutter should be closed unless requested by physop Check with the physop before opening other diagnostic gate-valves or shutters. Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): YES ICRF(yes/no): yes -- all transmitters LH(yes/no): no power requested, but LH-SOL reflectometer will be used. Cryopump (yes/no): no DNB (yes/no): not requested 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 ================================== Tentative plan: Will load a Segment 1 from 1111215 an import seg 2 from 1111209001 Then proceed with Session Leader plan to exercise J-port as a 2-strap, etc.

Session Leader Summaries

Entered: Dec 16 2011 05:28:27:100PM

Author: Steve Wukitch

Run Summary The reconfigured J antenna runs reasonably well as a dipole. The powered straps are #3 and #4 (closest pair to K port) and copuled voltage in straps #1 and #2 is higher during D/E operation than during J. This indicates the shorts are in a good location to prevent #1 and #2 from acting as passive radiators. We reached voltage maximum approaching 40 kV for short pulses and did not press too aggressively. Maximum power reached 1.4 MW into L-mode discharges but H-mode discharges may be trouble due to the lighter loading. We also explored the neutral pressure limit and found that J antenna (>2.3 mtorr or nebar~2.5x10^20) is signficantly higher than D and E antennas. This should allow higher density operation.

Physics Operator Summaries

Entered: Dec 16 2011 05:13:30:010PM

Author: Jerry Hughes

There was a brief delay this morning getting the alternator up to speed, but after we got the first shot off at 9:32, the machine ran with no significant hangs. On shots 5 and 24 there were nl04 fringe jumps that caused DPCS to reduce or eliminate its feedback puff. There were 5 fizzles, and a few shots with minor early runaways. There was a small N2 leak identified mid-afternoon, which may have contributed to the fizzle on shot 22. During the day I made small tweaks to the pre-fill, but otherwise no changes to startup. The first half of the run required repeated L-mode plasmas at low-to-moderate density to evaluate RF coupling from D, E, and the reconfigured 2-strap J. Initially we obtained brief H-modes, which were mitigated by lowering the nl04 demand to 6e19, thus edging into the low-density branch of the power threshold. Nonetheless we still got L-H dithers, even at low power. Starting with shot 9, I raised the strike point up about 3 tile rows, and the plasmas stayed reliably in L-mode after that. In the afternoon, SL requested density ramps in order to evaluate neutral pressure limits on J,D and E. In order to get nl04 to ramp all the way from 0.6e20 to 1.1e20, it was necessary to introduce some integral gain to the nl04 controller. At Wolfe's recommendation, I used the same value as was being used for the proportional gain. This worked to get the density up, even causing some overshoot. It produced very nice midplane pressure ramps, as desired. This was how we tried to run shots 16 through 25. RF group established that the pressure limit for the new J-port design is much higher than before, which is an excellent result! From shot 26 on we went back to flat density targets for RF power steps. J-port continued to perform well even at high densities. Final tally: 29 plasmas into ramp-down 5 fizzles 0 duds

Session Leader Comments
Dec 16 2011 10:58:53:257AM	1111216003	Steve Wukitch	003 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.25, 1.60] sec, 0.50 to 0.75 MW, 80.5 MHz E : t = [0.90, 1.25] sec, 0.20 to 0.75 MW, 80.0 MHz J4: t = [0.50, 0.90] sec, 0.25 to 0.75 MW, 78.0 MHz result: plasma into rampdown, less dithers still significant density evolution with antennas next: repeat - move ninja to arrive at 0.6 stair case the RF waveforms
Dec 16 2011 10:57:51:403AM	1111216004	Steve Wukitch	004 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [1.05, 1.45] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 78.0 MHz result: plasma into rampdown still significant density evolution with D/E antennas next: repeat - switch RF order to E-J-D
Dec 16 2011 10:57:12:347AM	1111216005	Steve Wukitch	005 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [1.05, 1.45] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 78.0 MHz result: plasma into rampdown significant density evolution with D/E antennas - less with J JT notes SOL difference between E and J lost density feedback next: repeat
Dec 16 2011 10:56:50:890AM	1111216006	Steve Wukitch	006 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.15 to 0.75 MW, 78.0 MHz result: plasma into rampdown injection during J pulse next: repeat switch RF order to J-E-D
Dec 16 2011 11:11:32:037AM	1111216007	Steve Wukitch	007 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [1.05, 1.45] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.85 MW, 78.0 MHz result: plasma into rampdown next: repeat
Dec 16 2011 11:19:16:847AM	1111216008	Steve Wukitch	008 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [1.05, 1.45] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.85 MW, 78.0 MHz result: plasma into rampdown dithering at low power next: move outer divertor strike point up earlier in discharge
Dec 16 2011 11:33:22:327AM	1111216009	Steve Wukitch	009 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [1.05, 1.45] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.85 MW, 78.0 MHz result: plasma into rampdown less dithering - excellent next: swap order to E-J-D
Dec 16 2011 12:04:01:353PM	1111216010	Steve Wukitch	fizzle
Dec 16 2011 12:06:23:673PM	1111216011	Steve Wukitch	011 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.15 to 0.85 MW, 78.0 MHz result: plasma into rampdown next: swap D for E
Dec 16 2011 12:31:46:867PM	1111216012	Steve Wukitch	012 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.15 to 0.85 MW, 78.0 MHz result: plasma into rampdown D did not run well due to match next: repeat with better match
Dec 16 2011 12:33:28:383PM	1111216013	Steve Wukitch	013 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.45, 1.60] sec, 0.25 to 0.75 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.15 to 0.85 MW, 78.0 MHz result: plasma into rampdown good RF next: repeat with RF order J-D-E
Dec 16 2011 12:55:28:267PM	1111216014	Steve Wukitch	014 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.05, 1.45] sec, 0.15 to 0.85 MW, 80.5 MHz E : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 78.0 MHz result: plasma into rampdown good RF next: repeat with balanced RF
Dec 16 2011 01:00:02:500PM	1111216015	Steve Wukitch	015 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.05, 1.45] sec, 0.15 to 0.85 MW, 80.5 MHz E : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 0.75 MW, 78.0 MHz result: plasma into rampdown good RF next: check neutral pressure limit
Dec 16 2011 01:13:08:610PM	1111216016	Steve Wukitch	016 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6-1.1, LSN J4: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF next: density did not ramp fast enough adjust ramp
Dec 16 2011 01:27:02:753PM	1111216017	Steve Wukitch	017 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN J4: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF next: density did not ramp fast enough adjust ramp - increase integral gain to 2 from 0
Dec 16 2011 01:38:56:687PM	1111216018	Steve Wukitch	fizzle
Dec 16 2011 01:50:00:343PM	1111216019	Steve Wukitch	019 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN J4: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, good density/neutral pressure scan next: repeat with better RF match late
Dec 16 2011 02:00:58:073PM	1111216020	Steve Wukitch	020 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN J4: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, good density scan next: repeat with E antenna
Dec 16 2011 02:01:17:167PM	1111216020	Steve Wukitch	020 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN J4: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, good density scan next: repeat with E antenna
Dec 16 2011 02:18:57:620PM	1111216021	Steve Wukitch	E: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, good density scan - neutral pressure limit reached nearly identical limit as previous next: repeat with E antenna and different programmed faults
Dec 16 2011 02:40:14:213PM	1111216022	Steve Wukitch	fizzle
Dec 16 2011 02:46:57:887PM	1111216023	Steve Wukitch	023 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN E: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, good density scan - neutral pressure limit reached restart fails at programmed notch - at higher neutral pressure next: repeat with D antenna
Dec 16 2011 02:56:50:483PM	1111216024	Steve Wukitch	024 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN D: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, fringe jump density next: repeat with more density
Dec 16 2011 03:24:25:510PM	1111216025	Steve Wukitch	025 request: Bt=5.4 T, Ip=0.8 MA, nl04 ramp to 1.1, LSN D: t = [0.60, 1.50] sec, 0.5 MW, 78.0 MHz result: plasma into rampdown good RF, neutral pressure limit is obtained next: return to raising J power - recall 015
Dec 16 2011 03:30:22:310PM	1111216026	Steve Wukitch	026 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.05, 1.45] sec, 0.15 to 1.00 MW, 80.5 MHz E : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 1.00 MW, 78.0 MHz result: plasma into rampdown J struggled at 1 MW H/H+D ~0.14 next: raise target density to 0.8
Dec 16 2011 03:45:33:470PM	1111216027	Steve Wukitch	027 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.8, LSN D : t = [1.05, 1.45] sec, 0.15 to 1.00 MW, 80.5 MHz E : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.15 to 1.00 MW, 78.0 MHz result: plasma into rampdown J struggled at 1 MW H/H+D ~0.14 next: raise J; compare with E antenna
Dec 16 2011 04:02:21:370PM	1111216029	Steve Wukitch	fizzle
Dec 16 2011 04:23:11:247PM	1111216030	Steve Wukitch	fizzle
Dec 16 2011 04:42:02:217PM	1111216031	Steve Wukitch	031 Bt=5.4 T, Ip=0.8 MA, nl04=0.9, LSN D : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.5 MHz E : t = [1.05, 1.45] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 1.00] sec, 0.30 to 1.20 MW, 78.0 MHz result: plasma into rampdown next: increase density to 1, rf order E-J-D
Dec 16 2011 04:47:15:230PM	1111216032	Steve Wukitch	032 request: Bt=5.4 T, Ip=0.8 MA, nl04~1, LSN D : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.30 to 1.20 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.30 to 1.40 MW, 78.0 MHz result: density was bit high next: try again
Dec 16 2011 04:58:20:520PM	1111216033	Steve Wukitch	033 request: Bt=5.4 T, Ip=0.8 MA, nl04~1, LSN D : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.30 to 1.20 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.30 to 1.40 MW, 78.0 MHz result: increasing the density decreased the voltage significantly next: raise power on J
Dec 16 2011 05:28:52:977PM	1111216034	Steve Wukitch	034 request: Bt=5.4 T, Ip=0.8 MA, nl04~1, LSN D : t = [1.45, 1.60] sec, 0.25 to 1.25 MW, 80.5 MHz E : t = [0.60, 1.00] sec, 0.30 to 1.20 MW, 80.0 MHz J4: t = [1.05, 1.45] sec, 0.30 to 1.40 MW, 78.0 MHz result: plasma - decent RF pulses - max RF from J next: end of run

Physics Operator Comments
Dec 16 2011 06:35:37:510AM	1111216001	Jerry Hughes	SL wants to start with 1111209001. Load 1111209001. Import Seg 1 from 1111215011 (a decent startup from yesterday) into Seg 1. Load at 16-Dec-2011 06:34:52.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done
Dec 16 2011 08:33:14:230AM	1111216001	Jerry Hughes	There is a delay in bringing up the alternator, which will set back the first shot by perhaps ~1 hour.
Dec 16 2011 09:15:26:593AM	1111216001	Jerry Hughes	We have the go-ahead to run now. Lock-up is proceeding.
Dec 16 2011 09:43:13:430AM	1111216001	Jerry Hughes	Shot 1. Attempt: Repeat of 1111209001. Result: 800kA, 5.4T Plasma well into rampdown. nl04 ~ 7e19 in L-mode; demand = 8e19. H/D ~ 0.08--0.12. Short H-modes triggered while D,E are on.
Dec 16 2011 09:49:51:250AM	1111216002	Jerry Hughes	Changes for this shot: Enable DNB Enable B-side lower (Ar) Lower nl04 demand in Seg 2 from 8e19 to 6e19 --- attempt to stay out of H-mode Load at 16-Dec-2011 09:42:46.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done =============== Result: Clean shot. nl04 is close to demanded value. No substantial H-mode activity. Dithering?
Dec 16 2011 10:09:42:690AM	1111216003	Jerry Hughes	Shot 3 No changes. ========== Result: Runs. No H-modes. Lots of RF-induced fueling especially from D, E.
Dec 16 2011 10:27:51:657AM	1111216004	Jerry Hughes	Shot 4. No changes. ========== Result: Runs. RF program is changed. JT started firing the NINJA with He4 on shot 3. Curiously, the valve triggers 100ms after it's programmed start time.
Dec 16 2011 10:40:15:730AM	1111216005	Jerry Hughes	Shot 5 No changes. ========== Result: No density feedback was available during Seg 2. Attributable to a fringe jump in nl04. E-port saved the discharge through enhanced fueling. Injection during ramp-up. Otherwise shot was okay.
Dec 16 2011 10:59:55:027AM	1111216006	Jerry Hughes	Shot 6. No changes. ========== Result: Runs. Some suggestions of L-H dithering, particularly with D, E.
Dec 16 2011 11:07:58:643AM	1111216007	Jerry Hughes	Shot 7. No changes. And it was good that there were no changes, because my workstation became non-responsive between shots. ============ Result: Runs. RF runs. H/D reaches 0.25.
Dec 16 2011 11:17:19:063AM	1111216008	Jerry Hughes	Shot 8 No PO changes ======= Result: Runs through. Some runaways early.
Dec 16 2011 11:36:54:760AM	1111216009	Jerry Hughes	Shot 9 Changes: Attempt to get strike point higher on plate earlier in flattop. Increase RXL program to +0.00 early in Seg 2, ramping to its original value of -0.01 m by 1.5s. Load at 16-Dec-2011 11:24:33.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============== Result: Strike point is higher, at the boundary of the 3rd and 4th rows of tiles. Stays there throughout flattop. No more dithering.
Dec 16 2011 12:00:14:733PM	1111216010	Jerry Hughes	Shot 10. No PO changes ========= Result: Fizzle. Inner bounce kills it.
Dec 16 2011 12:05:32:250PM	1111216011	Jerry Hughes	Shot 11. No PO changes (Benign neglect) =============== Result: Runs through. Start-up is ok. ICRF continues to exercise.
Dec 16 2011 12:40:00:007PM	1111216012	Jerry Hughes	Shot 12: No PO changes ============ Result: Runs through.
Dec 16 2011 12:40:16:603PM	1111216013	Jerry Hughes	Shot 13: No PO changes ============ Result: Runs through.
Dec 16 2011 12:49:55:457PM	1111216014	Jerry Hughes	Shot 14 No PO changes ========== Result: Runs through.
Dec 16 2011 12:57:57:243PM	1111216015	Jerry Hughes	Shot 15. No PO changes. ======== Result: Runs through.
Dec 16 2011 01:12:18:480PM	1111216016	Jerry Hughes	Shot 16: Changes: Program ramp in nl04 from 0.6e20 to 1.1e20 over [0.7,1.3]s. Load at 16-Dec-2011 13:01:19.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============ Result: Runs through. Max nl04 obtained is 8.5e19, not enough to get the neutral pressure up. PG3 doesn't really kick in until ~1s, and after that it doesn't push hard enough.
Dec 16 2011 01:31:07:060PM	1111216017	Jerry Hughes	Shot 17 Changes: Program nl04 to jump from 6e19 to 9e19 at 0.7s, then ramp up to 1.1e20 at 1.3s, then hold at 1.1 until 1.5s Load at 16-Dec-2011 13:16:58.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ======== Result: PG3 puff is pegged at 20% during flattop. nl04 maxes out at 9e19
Dec 16 2011 01:42:44:747PM	1111216018	Jerry Hughes	Shot 18. Changes: Add integral gain of 2 to nl04 from 0.7s to 1.5s Load at 16-Dec-2011 13:28:42.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============== Result: Fizzle
Dec 16 2011 01:53:06:697PM	1111216019	Jerry Hughes	Shot 19: Retry. No PO changes. ======== Result: Runs through. Substantial density ramp is obtained using the finite integral gain. nl04 is heading up toward 1.1e20, when power from J-port suddenly drops slightly. Around that time, the plasma fuels up quickly to >1.3e20. Doesn't make it as far into rampdown. J stays on while G-side pressure ramps from 0.03 to 2 mtorr.
Dec 16 2011 02:03:26:703PM	1111216020	Jerry Hughes	Shot 20. No PO changes ========= Result: Similar to last shot. Apparently J-port can both stay on and retry, if needed, at high neutral pressure.
Dec 16 2011 02:29:44:263PM	1111216021	Jerry Hughes	Shot 21: No PO changes. RF will try to neutral pressure limit test on E-port. ======== Result: Runs through.
Dec 16 2011 02:31:12:923PM	1111216022	Jerry Hughes	Shot 22 No PO changes. ======== Result: Fizzle. Not too surprising given all the high density ramp-down disruptions of late. Also I am informed there is a small N2 leak. Tom is dialing back the cooling.
Dec 16 2011 02:59:58:063PM	1111216023	Jerry Hughes	Shot 23. Retry with no changes. ========= Result Runs through.
Dec 16 2011 02:59:00:267PM	1111216024	Jerry Hughes	Shot 24. No PO changes. ========== Result: Runs through. Unfortunately we do not get the density feedback we're looking for, due to a recurrence of the TCI fringe jump issue we saw on shot 5.
Dec 16 2011 03:10:37:200PM	1111216025	Jerry Hughes	Shot 25. Change: Reduce PG4 pre-puff from 15ms to 14ms. Load at 16-Dec-2011 15:03:05.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done =============== Result: Runs through, disrupting in rampdown again. nl04 increases from 0.6e20 to 1.4e20. D is lost at 0.9s.
Dec 16 2011 03:29:55:017PM	1111216026	Jerry Hughes	Shot 26 Changes: Load Seg 2 from shot 015. This has nl04 programmed flat at 6e19. Load at 16-Dec-2011 15:14:44.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ================ Result: Runs through. Gas feedback shuts off after 0.5s and RF fuels it the rest of the way.
Dec 16 2011 03:42:00:340PM	1111216027	Jerry Hughes	Shot 27 Changes: Raise nl04 flattop demand from 0.6e20 to 0.8e20 Load at 16-Dec-2011 15:31:26.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done =============== Results: Runs through. nl04 is close to programmed value.
Dec 16 2011 03:55:48:163PM	1111216028	Jerry Hughes	Shot 28 No PO changes ============ Result: Runs through. Good shot. Analysis TCI cuts out after 0.9s. DPCS input looks okay throughout shot.
Dec 16 2011 04:03:21:710PM	1111216029	Jerry Hughes	Shot 29 Changes: Raise nl04 program from 0.8e20 to 1.05e20. Load at 16-Dec-2011 15:57:33.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============ Result: Fizzle
Dec 16 2011 05:01:38:333PM	1111216030	Jerry Hughes	Shot 30. Changes: Increase pre-puff in Seg 1 from 14ms to 15ms. Load at 16-Dec-2011 16:08:21.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done =============== Result: Fizzle
Dec 16 2011 04:31:55:657PM	1111216031	Jerry Hughes	Shot 31 No PO changes ========= Result: Runs through this time. Doesn't quite reach the programmed density.
Dec 16 2011 04:51:41:553PM	1111216032	Jerry Hughes	Shot 32. Changes. Apply integral gain = 2 to nl04 beginning at 0.7s. Load at 16-Dec-2011 16:34:18.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============= Result: Runs through, but too much density. Boy, integral gain really adds up.
Dec 16 2011 04:57:06:127PM	1111216033	Jerry Hughes	Shot 33: Changes: Turn off integral gain after 1.1s. Also lower nl04 demand from 1.05e20 to 1.0e20 Load at 16-Dec-2011 16:47:47.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============== Result: Density is flatter, hovering around 1.1e20.
Dec 16 2011 05:14:16:650PM	1111216034	Jerry Hughes	Shot 34: Changes: reduce pre-puff from 15ms to 14ms Load at 16-Dec-2011 16:58:51.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done ============ Result: runs through. Last shot of 2011.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:29:05:783AM	Plasma	Ok
2	09:43:25:033AM	Plasma	Ok
3	10:03:10:530AM	Plasma	Ok
4	10:15:58:370AM	Plasma	Ok
5	10:29:10:367AM	Plasma	Ok
6	10:44:16:443AM	Plasma	Ok
7	10:58:40:980AM	Plasma	Ok
8	11:11:28:067AM	Plasma	Ok
9	11:27:10:643AM	Plasma	Ok
10	11:47:22:040AM	Plasma	Ok
11	12:00:29:800PM	Plasma	Ok
12	12:14:06:423PM	Plasma	Ok
13	12:27:19:110PM	Plasma	Ok
14	12:40:07:797PM	Plasma	Ok
15	12:52:49:780PM	Plasma	Ok
16	01:05:43:083PM	Plasma	Ok
17	01:19:06:003PM	Plasma	Ok
18	01:31:58:613PM	Plasma	Ok
19	01:44:31:380PM	Plasma	Ok
20	01:57:06:450PM	Plasma	Ok
21	02:11:06:090PM	Plasma	Ok
22	02:24:00:593PM	Plasma	Ok
23	02:38:34:333PM	Plasma	Ok
24	02:51:49:873PM	Plasma	Ok
25	03:05:58:953PM	Plasma	Ok
26	03:20:11:247PM	Plasma	Ok
27	03:33:26:447PM	Plasma	Ok
28	03:46:40:600PM	Plasma	Ok
29	03:59:58:587PM	Plasma	Ok
30	04:12:18:153PM	Plasma	Ok
31	04:24:47:230PM	Plasma	Ok
32	04:38:01:927PM	Plasma	Ok
33	04:51:16:650PM	Plasma	Ok
34	05:05:33:247PM	Plasma	Ok

System Availability

Dec 16 2011 09:43:12:700AM

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 2pi and midplane AXUV diodes awaiting first plasma. Divertor diodes installed, but amplifiers need to be installed. Core and divertor bolometry not yet hooked up Nov 17 2011 02:45PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed. Magnetron Unplugged Apr 11 2011 09:51AM (dekow) Jim Irby Boronization dekow,irby 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 no Shut down. Helium dewar removed. LN2 manual valve closed/ red-tagged and solenoid valves are closed Apr 15 2011 10:55AM (dekow) 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 no Diodes are taking data, but system is not fully operational yet. Post-acquisition data processing code is not yet functional. Dec 02 2011 03:27PM (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 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 no Breakers off and red tagged Apr 14 2011 11:27AM (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 no Beamline disconnected Apr 14 2011 11:53AM (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 working with the shot cycle. Viewing Mo line-emission normally covered by McPherson. Raw data only in tree. Dec 01 2011 02:54PM (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 no Midplane Lyman awaiting first plasma. B-PORT and LEDGE arrays installed but do not yet have amplifiers hooked up. Nov 17 2011 02:42PM (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 new turbo pump, installed, McP pumping down. Almost ready to open to machine. Dec 06 2011 12:16PM (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 no safety risk for in-vessel access as of 4/14/2011 Apr 14 2011 11:48AM (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 no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch no Red tagged off Apr 12 2011 07:23AM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI no Breaker opened and red tagged Apr 11 2011 11:59AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX no Breakers opened and red tagged Apr 11 2011 12:00PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems no All systems disabled for in-vessel entry Apr 14 2011 11:29AM (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 Starting on 1111215009, the 50, 60 75, 88l and 88u are online. The 112, 140 and variable are still disconnected. Dec 15 2011 10:53AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP no Dan's ISP probe is installed. Pumping down now... Dec 13 2011 05:04PM (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 Passive mode only Dec 13 2011 02:48PM (g) 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 no All lasers are shut down and cannot be fired into cell. Apr 11 2011 01:20PM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge no All lasers are shut down and cannot be fired into cell. Apr 11 2011 01:20PM (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 working with the shot cycle. Viewing low-Z emission. Dec 01 2011 02:55PM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->4 waiting first plasma, new core ARRAY5 needs debugging and the calibration data checked Nov 17 2011 02:44PM (mlreinke) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke