Miniproposals

Miniproposal: 527 Date Filed: 1/24/2008 Title: Optimization of H-mode pedestal and performance with magnetic balance control and active pumping First Author: Jerry Hughes Session Leader: Jerry Hughes (shots 2-37)

Engineering Operator Run Comment

Optimization of H-mode pedestal and performance with magnetic balance co

Session Leader Plans

Entered: Oct 22 2009 06:20:06:890AM

Author: Jerry Hughes

MP 527. Continued from 1091021. Setup: Overnight bake/ECDC 5.4T run in D2. 1psi Ar enabled, puff at 0.3s, 50ms in length ICRF: up to 3MW from D+E Essential diagnostics: Thomson, TCI, ECE, standard bolometry and Lyman alpha, reflectometry, fast magnetics. Highly desired diagnostics: passive edge CXRS, Hirex rotation, divertor probes Cryopump NOT requested. This run will continue the experiment begun on 1091021. Referring to the run plan for 1091021, we basically knocked out steps A and F, plus a fair amount of on C. The run ended with some good 1MA EDA H-modes with SSEP of ~-5mm. We will begin by reproducing shot 1091021032, then finish up some SSEP variation at 1MA. Following that we will attempt SSEP variation at 1.2MA and 0.8MA, per B and D of the original run plan. The details of the ZCUR programming will be at SL's discretion. A likely path will be: A. 1. Reproduce 1091021032 (1MA, SSEP flat at -5mm) 2. Introduce a net ZCUR change of +4mm over 1.0 to 1.1s 3. Increment the ZCUR ramp by 4mm on each successive shot until data are obtained at SSEP of +6mm or higher. Depending on machine conditions, time, and other factors, B. may be skipped B. 1. Raise current to 1.2MA, nl04 to 1.2e20, and remove ZCUR ramp at 1.0s 2. Introduce a net ZCUR change of +4mm over 1.0 to 1.1s 3. Increment the ZCUR ramp by 4mm on each successive shot until data are obtained at SSEP of +6mm or higher. C. 1. Lower current to 0.8MA, nl04 to 0.8e20, and remove ZCUR ramp at 1.0s 2. Introduce a net ZCUR change of +4mm over 1.0 to 1.1s 3. Increment the ZCUR ramp by 4mm on each successive shot until data are obtained at SSEP of +6mm or higher. D. 1. Lower current to 0.6MA, nl04 to 0.6e20, and remove ZCUR ramp at 1.0s 2. Introduce a net ZCUR change of +4mm over 1.0 to 1.1s 3. Increment the ZCUR ramp by 4mm on each successive shot until data are obtained at SSEP of +6mm or higher. If there is time, try E: E. 1. Find a suitable target from earlier in the day with decent confinement properties. Rerun with flat ZCUR programming and step down ICRF power by 0.5MW shot to shot. 2. When power falls below the L-H threshold at this configuration, hold RF at that level and sweep ZCUR from 1.0 to 1.5s, such that the discharge goes through DN sometime around 1.4s. 3. If depressed power threshold near DN is suggested (as it was on shot 1091021033), then repeat, lowering power in steps of 0.2MW. 4. Repeat the power scan in 3, with the discharge starting USN and sweeping ZCUR more negative to obtain DN at 1.4s

Physics Operators Plans

Entered: Oct 21 2009 05:32:02:860PM

Author: Earl Marmar

Engineering setup for Thursday 22 October 2009 MP527 - H-mode SSEP scans Session leader: J. Hughes Physics operator: E. Marmar Overnight: usual ECDC in D2 and 60 C bake Run will start at 09:00 and end at 17:00. Power systems as on 1091021032 A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Enabled (standard configuration) 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) leave NINJA as is DISABLED Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo Torvac setup: keep gate valves open during PULSE Specific diagnostics: standard set plus fast magnetics, reflectometry. Highly desired: HIREX, divertor probes, passive edge CXRS ------------------------------------------------------------------------------ Boronization: no ICRF Setup: D and E transmitters in run-on by 08:30 LH Setup: no DNB: no Cryopump: no ------------------------------------------------------------------------------ Run plan: SSEP jogs; Load from 1091021032; See the session leader's run plan in the logbook for detailed information.

Session Leader Summaries

Entered: Oct 22 2009 05:30:59:347PM

Author: Jerry Hughes

This run picked up where 1091021 left off, and was fairly successful at obtaining pedestal data and confinement characteristics at varying degrees of magnetic balance. Unlike prior experiments in 2007 and 2008, we took care to maintain up-down symmetry of the X-points, so that effects of increased/decreased triangularity would not be a additional parameter affecting pedestal structure. SSEP scans and jogs in H-mode were obtained at 1.0MA and 0.8MA. Although higher current values were tried, there was trouble with stability and impurity accumulation. While confinement degradation was demonstrated at DN and USN, as previously seen in 2007/2008, the pedestal desnity reduction we saw in USN was not reproduced. This remained true, when, on a hunch, I moved the upper X-point inboard to match the shapes used in the previous experiments (1070821, 1080125). It is conceivable that more power is needed to maintain the density pump-out in USN. Today we were limited to <3MW. We did see a repeatable jump in H-mode density right at DN, all day in 0.8 and 1.0MA plasmas. This also differs from the prior results. Something to think hard about. Toward the end of the run, I requested SSEP scans from LSN to USN with RF power varied downward from 2.9MW. Evidence for a local depression in H-mode power threshold at DN was observed in this series, buffeting the result from shot 1091021033. With Prf of 1.1MW, the LSN case did not access H-mode, while the near DN case did. Attempts to access H-mode at lower ICRF power levels did not succeed at any SSEP. All in all, a productive day. Shot summary: 001: Test shot 002: 1MA EDA H-mode, good RF until 0.98s 003: 1MA EDA H-mode, SSEP scans from -4mm to -1mm at ~1s. 004: 1MA with H-modes. Decent data point at SSEP=+1mm 005: 1MA EDA H-mode, clean until 1.24s injection. Good data at SSEP~+2mm. 006: No plasma 007: ELM-free H-mode from 1.15--1.24s. SSEP~+4mm 008: ELM-free H-mode from 1.14--1.24s. SSEP~+5mm 009: 1MA EDA H-mode. SSEP scan with confinement degradation from ~-5mm to ~+5mm 010: 1MA EDA H-mode. Same confinement degradation from ~-5mm to ~+5mm, just earlier. 011: 800ka EDA H-mode, fairly steady from 0.96 to 1.15s. 012: 800kA EDA H-mode, steady. A change in SSEP from -5mm to -3mm obtained. 013: 800kA EDA H-mode. SSEP reaches 0mm. Prad is clean, RF is clean. 014: 800kA EDA H-mode. SSEP scans from -5mm to +3mm. 015: EDA H-mode with SSEP scanning up to +5mm. 016: 800kA EDA H-mode. SSEP swings up to 0mm and then back down to -4mm. 017: 800kA EDA H-mode, SSEP scans from -5mm to -9mm. 018: 1.2MA. Disrupts at 0.63s. 019: 1.2MA. Disrupts at 0.44s. 020: 1.2MA. Disrupts at 0.77s. 021: 1.1MA. H-modes, unsteady. 022: 1.1MA. 1.25MW. No H-mode 023: 1.1MA. 2.4MW. EDA H-mode, high density, fairly radiative. 024: 1.1MA. 2.4MW. EDA H-mode. More radiative than the H-mode in 11 025: 800kA EDA H-mode. 2.9MW SSEP sweep is there. 026: 800kA Ohmic. The 2007 RXU is used. 027: 800kA. Mostly Ohmic. The 2007 RXU is used 028: Disrupted at 0.43s. 029: 800kA, 2.9MW. Multiple H-modes. Density looks lower in the USN point than in the LSN point. The 2007 RXU is used. 030: 800kA, 2.9MW. SSEP scans from -4mm to +4mm. No density pumpout. The 2007 RXU is used. 031: 800kA EDA H-mode. 2.9MW. Drop in confinement and H-L happens near DN. 032: 800kA EDA H-mode. 2.5MW. Good SSEP scan into USN with steady ICRF. 033: 800kA EDA H-mode, 2.0MW. Properties very similar to 32 and 31. 034: 800kA EDA H-mode, 1.5MW. Another good SSEP scan with confinement degradation. 035: 800kA, 1.1MW RF. L-H occurs at 1.18s, when SSEP is close to zero. Very similar to shot 33 from yesterday. 036: 800kA, 0.5MW RF. No L-H. 037: 800kA, 0.75MW RF. No L-H.

Physics Operator Summaries

Session Leader Comments
Oct 22 2009 09:14:41:413AM	1091022002	Jerry Hughes	Attempt: Reproduce 1091021032. Result: 1MA, EDA H-mode. Basically reproduces the target shot up to the point where D-port dropped out at 0.98s. Peak Wp is 140kJ instead of 152. H-mode density is a few % lower. Prad is similar.
Oct 22 2009 09:26:01:620AM	1091022003	Jerry Hughes	Attempt: Add a ZCUR jog from 1.0 to 1.1 s. Result: That worked well, despite some junk in the ramp-up. 1MA EDA H-mode, SSEP scans from -4mm to -1mm at ~1s.
Oct 22 2009 09:38:22:297AM	1091022004	Jerry Hughes	Attempt: Increase the ZCUR ramp. REsult: 1MA with H-modes. Injections ruin the early H-mode, but the 2nd one recovers, with reasonably low Prad. Looks like a decent data point at SSEP=+1mm
Oct 22 2009 09:58:10:337AM	1091022005	Jerry Hughes	Attempt: Increase ZCUR ramp to try to get the USN point. Result: 1MA EDA H-mode, clean until 1.24s injection. Good data at SSEP~+2mm.
Oct 22 2009 10:05:19:107AM	1091022006	Jerry Hughes	Attempt: Higher ZCUR step Result: Bad EF3. No plasma
Oct 22 2009 10:37:30:790AM	1091022007	Jerry Hughes	Attempt: ZCUR sweep to USN. Result: Some unplanned injections in the early part of the H-mode, in addition to Nate's planned CaF injection at 0.85s. Is the strike slightly low? ELM-free H-mode from 1.15--1.24s.
Oct 22 2009 10:49:30:027AM	1091022008	Jerry Hughes	Attempt: Try 7 again, with RXL and RXU slightly increased. Result: Change in strike point did not ameliorate injections in early H-mode. Something from antenna? Another ELM-free-ish H-mode from 1.14 to 1.24s.
Oct 22 2009 11:02:13:580AM	1091022009	Jerry Hughes	Attempt: Retry the ZCUR scan, but start it sooner: 0.85s. Result: 1MA EDA H-mode. Injections not a problem this time. SSEP scan with confinement degradation from ~-5mm to ~+5mm. H-L transition occurs at 1.135s, when Te,ped has dropped to <5mm. Interesting. Let's increase the rate of ZCUR ramp next.
Oct 22 2009 11:16:44:413AM	1091022010	Jerry Hughes	Attempt: Get SSEP well positive by .95s. Result: H-mode goes radiative and transitions back to L at a similar point in the SSEP scan --> SSEP=+4mm It seems we have a repeatable confinement degradation with higher SSEP. If we had more power we might be able to fight through it. Of course, then we might melt some stuff, so it's probably a good thing we don't have J. Addendum: It's pretty clear that we're not reproducing the density reduction that has been observed at 800kA.
Oct 22 2009 11:34:54:453AM	1091022011	Jerry Hughes	Attempt: 800kA with SSEP flat at -5mm Result: Good shot. 800ka EDA H-mode, fairly steady from 0.96 to 1.15s. LBO at 1.3s
Oct 22 2009 11:34:32:263AM	1091022012	Jerry Hughes	Attempt: 800kA with ZCUR bump up from 1.0 to 1.1s Result: 800kA EDA H-mode, steady. A change in SSEP from -5mm to -3mm obtained. LBO at 1.4s
Oct 22 2009 11:50:30:240AM	1091022013	Jerry Hughes	Attempt: Put in a ZCUR jog. Result: Not bad. A good demonstration the confinement droops when going to DN. 800kA EDA H-mode. SSEP reaches 0mm. Prad is clean, RF is clean.
Oct 22 2009 12:02:23:070PM	1091022014	Jerry Hughes	Attempt: Increase ZCUR ramp. Results: 800kA EDA H-mode. SSEP scans from -5mm to +3mm. Density bumps up slightly at the DN point, then comes back down to starting level.
Oct 22 2009 12:13:19:437PM	1091022015	Jerry Hughes	Attempt: Increase ZCUR ramp some more Result: EDA H-mode with SSEP scanning up to +5mm. Severe confinement degradation and H-L at the 200eV level.
Oct 22 2009 12:33:22:473PM	1091022016	Jerry Hughes	Attempt: Try 2 ZCUR jogs, first LSN-->DN, then DN-->LSN Results: 800kA EDA H-mode. SSEP swings up to 0mm and then back down to -4mm. Density increase at DN is observed again, along with a partial recovery when SSEP sweeps back down.
Oct 22 2009 12:49:41:840PM	1091022017	Jerry Hughes	Attempt: Scan ZCUR down this time Results: 800kA EDA H-mode, SSEP scans from -5mm to -9mm. The confinement drop is a little surprising. It may be largely triggered by some enhanced impurity as we begin the SSEP scan. May continue to worsen as a result of the kappa decreases from 1.6 to 1.53.
Oct 22 2009 01:24:23:463PM	1091022018	Jerry Hughes	Attempt: 1.2MA, SSEP=-4mm Result: Disrupts at 0.63s. q95=3.0
Oct 22 2009 01:25:41:430PM	1091022019	Jerry Hughes	Attempt: 1.2MA SSEP=-4mm. Earl changed something about the rampup Result: Disrupts at 0.44s. q95=3.0
Oct 22 2009 01:28:40:150PM	1091022020	Jerry Hughes	Attempt: 1.2MA, Ip ramp rate slowed down. Result: Lasted longer, disrupted at 0.77s. There was some RF from both D and E. I am suspicious of the integral q95.
Oct 22 2009 01:49:01:363PM	1091022021	Jerry Hughes	Attempt: Lower Ip to 1.1MA and see if it goes through. Result: It does go through. There are H-modes, but not useful ones. A rather large impurity influx in the first H-mode.
Oct 22 2009 01:50:05:487PM	1091022022	Jerry Hughes	Attempt: Repeat 21 and hope for steadier H-mode Result: D-port didn't fire, so no H-mode. Other than that the shot looked fine.
Oct 22 2009 02:15:46:060PM	1091022022	Jerry Hughes	Attempt: Retry with full power Result: EDA H-mode, high density, fairly radiative. L-H transition comes later than it has been. 2.5 MW, not really sure why the delayed H-mode. This is not so promising. The pedestal is fairly cold.
Oct 22 2009 02:20:35:157PM	1091022024	Jerry Hughes	Attempt: reload 11. 800kA. Result: EDA H-mode. More radiative than the H-mode in 11. H-mode quality degrades significantly after t=0.92s.
Oct 22 2009 02:34:55:583PM	1091022025	Jerry Hughes	Fiber plate adjustment: Bottom motor 3REV, for next shot.
Oct 22 2009 02:37:00:787PM	1091022025	Jerry Hughes	Attempt: 800kA with SSEP sweeping from -5mm to +3mm, higher power. Result: 800 kA EDA H-mode. 2.9MW SSEP sweep is there. Bump in density at DN is still there. Not a bad shot.
Oct 22 2009 02:42:33:197PM	1091022026	Jerry Hughes	Fiber plate adjustment: Bottom motor 3REV, for next shot.
Oct 22 2009 02:50:51:027PM	1091022026	Jerry Hughes	Attempt: Reproduce the old upper X-point from 1070821 Result: Ohmic, equilibrium looks about right.
Oct 22 2009 02:53:52:247PM	1091022027	Jerry Hughes	Attempt: Reproduce the old upper X-point from 1070821 Result: Mostly Ohmic, equilibrium looks about right.
Oct 22 2009 03:18:21:507PM	1091022028	Jerry Hughes	Attempt: Reproduce the old upper X-point from 1070821 Result: Disrupted at 0.43s.
Oct 22 2009 03:25:13:370PM	1091022029	Jerry Hughes	Attempt: Reproduce the old upper X-point from 1070821. The suspicion is that the higher triangularity is what gave us density pumpout in the 2007/2008 cases Result: RF is there. Density looks lower in the USN H-mode (with higher triangularity) than in the initial LSN H-mode. This would be consistent with the 2007/2008 results. Need to get a clean transition to upper null with steady H-mode.
Oct 22 2009 03:40:31:860PM	1091022030	Jerry Hughes	Attempt: Reproduce the old upper X-point from 1070821. The suspicion is that the higher triangularity is what gave us density pumpout in the 2007/2008 cases Result: There is no observable density pumpout when SSEP goes positive after 0.87s. It is possible that more power is necessary. But if that's so, there's nothing I can do about it today . . .
Oct 22 2009 03:47:04:590PM	1091022031	Jerry Hughes	Attempt: Reload 25 and slow down the ZCUR ramp. Result: 800kA EDA H-mode. 2.9MW. Drop in confinement and H-L happens near DN.
Oct 22 2009 04:00:28:230PM	1091022032	Jerry Hughes	Attempt: Repeat 31 with lower RF power Result: 800kA EDA H-mode. Good SSEP scan with steady ICRF. Density and radiation burst near DN. Density returns to the baseline level in USN. Again, in USN, Te,ped is lower for a given level of Pnet.
Oct 22 2009 04:18:45:067PM	1091022033	Jerry Hughes	Attempt: Repeat with lower Prf Result: 800kA EDA H-mode, 2.0MW. Properties very similar to 32 and 31.
Oct 22 2009 04:25:27:303PM	1091022034	Jerry Hughes	Attempt: Repeat with lower Prf Result: 800kA EDA H-mode, 1.5MW. SSEP scan is good.
Oct 22 2009 04:37:03:637PM	1091022035	Jerry Hughes	Attempt: Repeat with lower Prf Result: 800kA, 1.1MW RF. L-H occurs at 1.18s, when SSEP is close to 0.
Oct 22 2009 04:50:06:843PM	1091022036	Jerry Hughes	Attempt: Repeat with lower Prf Result: 800kA, 0.5MW RF. No L-H.
Oct 22 2009 05:07:38:790PM	1091022037	Jerry Hughes	Attempt: Repeat with 750kW Prf Result: 800kA with good SSEP scan. Prf=750kW. No H-mode.

Physics Operator Comments
Oct 22 2009 08:46:30:293AM	1091022001	Earl Marmar	no power cycle test
Oct 22 2009 09:13:36:930AM	1091022002	Earl Marmar	load from 1091021032 increase prefill puff to 15 ms (from 13 ms) plasma, full length
Oct 22 2009 09:26:43:230AM	1091022003	Earl Marmar	zcur mods as called out in SL run plan A.2 plasma, nearly full length bad behavior during startup - big Ip pause around 30 ms, followed by mega-hards hards gone by 0.3 s, rest of the shot looks ok
Oct 22 2009 09:42:44:707AM	1091022004	Earl Marmar	prefill puff to 16 ms (from 15 ms) zcur mods as called out in SL run plan A.3 plasma, full length startup looks good, no hards first H-mode has some impurity/injection problems
Oct 22 2009 09:58:00:743AM	1091022005	Earl Marmar	zcur up another 4 mm at 1.1 s and beyond add third time in clearin programming (fluxihh, zxa=.39, start at 1.1 s) plasma, full length
Oct 22 2009 10:00:25:650AM	1091022006	Earl Marmar	zcur up another 4 mm at 1.1 s and beyond power supply dud, no EF3 (EF3 breaker had pulled during init, and was reset)
Oct 22 2009 10:30:20:710AM	1091022007	Earl Marmar	try again plasma, full length
Oct 22 2009 10:49:25:107AM	1091022008	Earl Marmar	RXL and RXU both up by 0.0025 m plasma, full length
Oct 22 2009 10:53:47:420AM	1091022009	Earl Marmar	ZCUR ramp starts earlier (0.85 s), and goes higher (another 4 mm) start 3'rd CLEARIN phase at 1.0 (instead of 1.1) plasma, full length
Oct 22 2009 10:56:39:907AM	1091022010	Earl Marmar	ZCUR ramp starts at 0.85 s, ends at 0.95 s start 3'rd CLEARIN phase at 0.95 s (instead of 1.0)
Oct 22 2009 11:27:40:810AM	1091022011	Earl Marmar	Ip to 0.8 MA nl_04 target to 0.8e20 ZCUR straight across at -0.017m start 3'rd CLEARIN phase at 2.5 s (instead of 0.95) start TF rampdown at 1.5 s plasma, full length
Oct 22 2009 11:34:00:153AM	1091022012	Earl Marmar	ZCUR ramp up between 1.0 and 1.1 sec (by 0.004 m) fizzle off time to 1.8 s plasma, full length steady EDA, steady RF
Oct 22 2009 11:53:24:177AM	1091022013	Earl Marmar	ZCUR ramp up between 1.0 and 1.1 sec (by an additional 0.004 m) plasma, full length
Oct 22 2009 12:07:55:450PM	1091022014	Earl Marmar	ZCUR ramp up between 1.0 and 1.1 sec (by an additional 0.004 m) start 3'rd CLEARIN phase at 1.1 s (instead of 2.5) plasma, full length
Oct 22 2009 12:11:21:967PM	1091022015	Earl Marmar	ZCUR ramp up between 1.0 and 1.1 sec (by an additional 0.004 m) plasma, full length another wobbly startup, early mega hards
Oct 22 2009 12:22:53:970PM	1091022016	Earl Marmar	ZCUR ramp up between 1.0 and 1.0 sec (to double null), then back to -.017 after 1.2 sec 3'rd CLEARIN phase start to 2.5 s
Oct 22 2009 12:50:04:120PM	1091022018	Earl Marmar	Ip to 1.2 MA nl_04 target to 1.2e20 ZCUR -.017 straight across plasma, early disruption
Oct 22 2009 01:15:13:710PM	1091022019	Earl Marmar	increase Ip prop gain around .35 s fiddle with nl_04 ramp_up rate reduce prefill puff to 14 ms (from 16 ms) plasma, even earlier disruption
Oct 22 2009 01:23:27:680PM	1091022020	Earl Marmar	decrease Ip prop gain around .35 s reduce Ip ramp rate reduce nl_04 rampup rate plasma, disrupt at .77 s
Oct 22 2009 01:36:32:657PM	1091022021	Earl Marmar	Ip to 1.1 MA plasma, disrupt in rampdown (650 kA)
Oct 22 2009 02:10:25:637PM	1091022022	Earl Marmar	prefill puff to 17 ms (from 14 ms) plasma, full length
Oct 22 2009 02:09:45:370PM	1091022023	Earl Marmar	repeat plasma, full length
Oct 22 2009 02:26:40:410PM	1091022024	Earl Marmar	load from 1091022011 import segment 1 from 1091022023 into segment 1 plasma, full length
Oct 22 2009 02:26:26:690PM	1091022025	Earl Marmar	import segment 2 from 1091022014 into segment 2 plasma, full length
Oct 22 2009 02:41:52:303PM	1091022026	Earl Marmar	decrease RXU by 0.03 m during flattop plasma, full length no RF
Oct 22 2009 02:50:26:870PM	1091022027	Earl Marmar	repeat, with (not much) feeling plasma, full length very little RF
Oct 22 2009 03:24:53:460PM	1091022028	Earl Marmar	repeat plasma, early disruption, preceded by OH2L supply crowbar
Oct 22 2009 03:23:37:790PM	1091022029	Earl Marmar	re-repeat plasma, full length
Oct 22 2009 03:35:43:013PM	1091022030	Earl Marmar	bring the ZCUR jog earlier (start at 0.8 s) plasma, full length
Oct 22 2009 03:51:16:737PM	1091022031	Earl Marmar	import segment 2 from 1091022025 into segment 2 slow the zcur ramp, still starting at 1.0 s plasma, full length early hesitation, some hards
Oct 22 2009 04:10:31:923PM	1091022032	Earl Marmar	repeat (without the hards) plasma, full length
Oct 22 2009 04:10:20:173PM	1091022033	Earl Marmar	repeat plasma, full length
Oct 22 2009 04:21:30:880PM	1091022034	Earl Marmar	repeat plasma, full length
Oct 22 2009 04:34:26:527PM	1091022035	Earl Marmar	repeat plasma, full length
Oct 22 2009 05:06:07:617PM	1091022036	Earl Marmar	repeat plasma, full length
Oct 22 2009 05:06:22:227PM	1091022037	Earl Marmar	repeat plasma, full length

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:48:07:980AM	Test	Ok	CMODWS44 froze this was a No Power test shot
2	08:59:43:703AM	Plasma	Ok
3	09:12:32:240AM	Plasma	Ok
4	09:29:12:920AM	Plasma	Ok
5	09:43:08:160AM	Plasma	Ok
6	09:57:17:227AM	Plasma	Bad	EF3 No current
7	10:18:55:500AM	Plasma	Ok
8	10:33:15:320AM	Plasma	Ok
9	10:48:25:513AM	Plasma	Ok
10	11:00:56:127AM	Plasma	Ok
11	11:15:08:413AM	Plasma	Ok
12	11:27:49:497AM	Plasma	Ok
13	11:40:24:313AM	Plasma	Ok
14	11:53:02:770AM	Plasma	Ok
15	12:06:01:057PM	Plasma	Ok
16	12:21:53:000PM	Plasma	Ok
17	12:34:26:473PM	Plasma	Ok
18	12:48:08:933PM	Plasma	Ok
19	01:02:26:987PM	Plasma	Ok
20	01:15:00:350PM	Plasma	Ok
21	01:27:37:463PM	Plasma	Ok
22	01:40:18:327PM	Plasma	Ok
23	01:54:11:380PM	Plasma	Ok
24	02:08:25:650PM	Plasma	Ok
25	02:21:06:483PM	Plasma	Ok
26	02:33:45:147PM	Plasma	Ok
27	02:46:27:947PM	Plasma	Ok
28	03:00:10:093PM	Plasma	Bad	OH2L supply crowbars causing disruption
29	03:13:48:207PM	Plasma	Ok
30	03:26:31:980PM	Plasma	Ok
31	03:39:00:640PM	Plasma	Ok
32	03:51:37:923PM	Plasma	Ok
33	04:05:08:827PM	Plasma	Ok
34	04:17:34:630PM	Plasma	Ok
35	04:30:15:837PM	Plasma	Ok
36	04:44:34:360PM	Plasma	Ok
37	04:58:57:630PM	Plasma	Ok

System Availability

Oct 22 2009 08:47:40:480AM

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 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed from the Cell, Piezo box on Igloo Removed. System in safe mode for In-Vessel Access May 30 2008 02:25PM (dekow) Jim Irby Boronization dekow,irby CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Cyopump hardware is not yet reinstalled in the cell. Jul 14 2009 09:21PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (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 and operating; not yet calibrated Jul 14 2009 02:22PM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no safely disabled; ready to be dismantled May 28 2008 10:22AM (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 power locked & tagged out; gate valve disabled May 28 2008 10:03AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung ECDC no 6/10/09 Magnetron relocated to west wall in cell at H-port. All controls and hardware have been installed but need to be tested prior to full operation. Magnetron Unplugged and Red tagged, PEI breaker red tagged, Safe for In-Vessel Activity Jun 10 2009 02:35PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes All 32 channels working and calibrated. Oct 06 2009 11:17AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (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. Jul 28 2009 04:23PM (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 poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar HEAT no Disconnect switch is open, reg tagged and locked. Shunt Trip Breaker is opened. Safe for in-vessel work. Jun 04 2008 12:24PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Laser Blow-Off yes Requires some advance notice for laser start-up Oct 16 2009 12:46PM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (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 Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes Operational --- Uncalibrated and needs to be positioned at port Jun 25 2009 05:08PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry PCI no Down. Will not be fixed until vent. Sep 24 2009 09:10AM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,edlund,ennever,ntsujii,porkolab Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (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 Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes Operational ---- ECDC running as required Jun 19 2009 08:06AM (irby) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes Since 1090824xxx, all channels are operational. Aug 25 2009 09:31AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Sparker yes Sparker now at K-Hor. Set for 100 uA of current. Will up to 200 uA before first plasma Jun 18 2009 01:01PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 2 lasers working. 15 spatial channels operational. Calibrated Oct 13 2009 07:49PM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang TS - Edge yes Operational, and calibrated. Oct 11 2009 03:01PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Oct 22 2009 09:06:23:067AM

TS set up. First shot got lasers fired. beams look fine, a little below the target, yet acceptable. before next shot, top motor 5F. bot alignment seems fine, no change.

Oct 22 2009 09:14:03:553AM

I notice that approximately after we resume the run (from Oct 7,2009) the central TS ne started to zig-zag more than we calibrated.