| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | John Rice |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Andy Pfeiffer |
| Engineering Operator Run Comment |
| MP307, Large Volume ITBs at 2.8T with 50 MHz ICRF, SL John Rice, PO Earl |
| Session Leader Plans |
| Entered: Jul 25 2005 03:04:21:667PM |
| Author: John Rice |
| MP307, Large Volume ITBs at 2.8T with 50 MHz ICRF Start with an on-axis heating shot, such as 1040506023, at 0.5 MA, 3.4 T for RF tuning and to establish H-mode. Reduce B by 0.2 T shot to shot to arrive at 2.8 T, which should give an ITB, such as seen in 1040506034. obtain good density and temperature profiles from Thomson and Dalsa, as well as rotation profiles from HIREX. Attempt central heating with second harmonic heating from the 80 MHz. Argon (1 psi) and Ne (2 psi) should be mixed in the B-side lower plenunm, and enabled (40 ms). Dalsa and Thomson necessary for this run. |
| Physics Operators Plans |
| Entered: Jul 25 2005 05:02:54:493PM |
| Author: Earl Marmar |
| Physop Plan 1050726
MP 370 Large volume ITBs, 2.8T, 50 MHz SL: Rice PO: Marmar Overnight boronization use 120 psi from 10%B_2D_6/90%He bottle scan resonance from 50 to 103 cm, dwell at 52 normal fill pressures and duty factors follow boronization with: 4 hours He ECDC (5e-5 torr gauge) 1 hour D2 ECDC (2e-4 torr gauge) Engineering setup as on 1050725001 A-coil configuration: normal [+Dtop -Dbot -Jtop +Jbot] and enabled. Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar, 2 psi neon (mixed in plenum) Hybrid enabled (PG1) leave B-side upper 15 psi He3, disabled (PG2) fill B-main with 40 psi D2 Hybrid enabled (PG3) Enable the following: NeSox, ECE and VUV gate valves, Z-bolo shutters ICRF Setup: transmitters in run-on at 8:30 Load segment 1 from 1050725003 segment 2 from 1040506023 with appropriate updates we may try the new A-coil feedback start at 3.4 tesla with on-axis H-minority heating (50 MHz). Work down to 2.8 tesla to get off-axis ITBs, still H-minority (50 MHz). If getting good ITBs, add on axis heating with E-port (2'nd harmonic H, 80 MHz). |
| Session Leader Summaries |
| Entered: Jul 29 2005 01:45:46:550PM |
| Author: John Rice |
| Session Leader Run Summary for 1050726 MP370 Large Volume ITBs at 2.8 T w/ 50 MHz ICRF This was a successful run that produced many ITB discharges, in particular at currents of 0.45, 0.5, 0.6, 0.7 and 0.8 MA at 2.85T. The higher current ITBs had density peaking across the entire plasma radius, indicating a foot location near the edge pedestal, the purpose of the run. A few ITBs were obtained with low field side ICRF, and had narrower foot locations. At the very end, there were a few H-modes produced with 2nd harmonic heating. ITB shots of particular interest were 10, 18, 19, 22, 23, 24, 25, 26, 31 and 32. |
| Physics Operator Summaries |
| Entered: Jul 26 2005 05:27:12:293PM |
| Author: Earl Marmar |
| This was a very good run. The machine and RF ran well, with field, current and density scans of various flavors for the Mini-Proposal.
Startup was quite robust, with no particular post-boronization issues. The first shot fizzled; lowering the fill pressure seemed to solve the problem. Shot 21 was a dud; raising the fill worked for the next shot. Shot 34 had a late breakdown, got to 130 kA and then rolled over (big increases on z-meter and h-alpha around 20 msec); lowering the fill gave a dud; raising it gave 2 more plasmas at the end of the run. Many of the startups had hesitations/bounces, with some hards. 40 msec argon/neon puffs were definitely causing problems with the plasmas. There was no argon/neon from shot 8 through the end of the run. The last 2 shots had E-port only (80 MHz) at 2.7 tesla, with 2'nd harmonic hydrogen resonance near the axis. Both had EDA-like H-modes. Many shots were run with q_95 at or below 3; they typically disrupted before the end of the programmed flat-top. In piggy-back, Brock got the first stereo images of a lithium pellet, with 2 microsecond time resolution (shot 31). Striations are clearly visible in the images. Scorecard: 1 fizzle 1 130 kA early death 2 duds 33 plasmas 37 data system cycles |
| Session Leader Comments | |||
| Jul 26 2005 09:21:56:213AM | 1050726001 | John Rice | fiz |
| Jul 26 2005 09:22:21:090AM | 1050726002 | John Rice | 1.0 MA, 5.2 T fiducial |
| Jul 26 2005 09:38:44:247AM | 1050726003 | John Rice | attempt at 3.4 T, 0.5 MA disrupted |
| Jul 26 2005 09:53:37:557AM | 1050726004 | John Rice | attempt at 3.4 T, 0.5 MA disrupted |
| Jul 26 2005 10:05:52:260AM | 1050726005 | John Rice | 3.4 T, 0.6 MA |
| Jul 26 2005 10:21:47:590AM | 1050726006 | John Rice | 3.4 T, 0.6 MA H-modes |
| Jul 26 2005 10:22:01:247AM | 1050726006 | John Rice | 3.2 T, 0.6 MA H-modes |
| Jul 26 2005 10:32:57:370AM | 1050726007 | John Rice | 3.2 T, 0.55 MA ELM-free H-modes |
| Jul 26 2005 10:47:08:510AM | 1050726008 | John Rice | 3.2 T, 0.55 MA EDA H-mode Ar off |
| Jul 26 2005 11:05:35:450AM | 1050726009 | John Rice | 3.0 T, 0.55 MA EDA H-mode ITB? |
| Jul 26 2005 11:17:04:747AM | 1050726010 | John Rice | 2.8 T, 0.55 MA EDA H-mode ITB |
| Jul 26 2005 11:31:12:340AM | 1050726011 | John Rice | 2.8 T, 0.5 MA EDA H-mode ITB |
| Jul 26 2005 11:39:20:667AM | 1050726012 | John Rice | 2.8 T, 0.5 MA EDA H-modes ITBs |
| Jul 26 2005 11:59:35:307AM | 1050726013 | John Rice | 2.65 T, 0.5 MA EDA H-modes ITBs |
| Jul 26 2005 12:07:40:400PM | 1050726014 | John Rice | 2.65 T, 0.5 MA EDA H-mode ITB on-axis 2nd harmonic heating, 0.6 MW at 1.0 s |
| Jul 26 2005 12:22:47:620PM | 1050726015 | John Rice | 2.65 T, 0.5 MA ELM-free H-modes no ITB no on-axis 2nd harmonic heating |
| Jul 26 2005 12:32:18:057PM | 1050726016 | John Rice | 2.65 T, 0.45 MA EDA H-mode ITB on-axis 2nd harmonic heating |
| Jul 26 2005 12:51:03:700PM | 1050726016 | John Rice | 2.85 T, 0.45 MA ELM-free H-mode no ITB on-axis 2nd harmonic heating |
| Jul 26 2005 12:54:59:307PM | 1050726017 | John Rice | 2.85 T, 0.45 MA ELM-free H-mode no ITB on-axis 2nd harmonic heating |
| Jul 26 2005 12:57:57:620PM | 1050726018 | John Rice | 2.85 T, 0.45 MA EDA H-mode steady ITB on-axis 2nd harmonic heating |
| Jul 26 2005 01:09:32:353PM | 1050726019 | John Rice | 2.85 T, 0.45 MA EDA H-mode ITB no on-axis 2nd harmonic heating |
| Jul 26 2005 01:24:39:650PM | 1050726020 | John Rice | 2.85 T, 0.45 MA EDA H-mode ITB on-axis 2nd harmonic heating |
| Jul 26 2005 01:32:42:293PM | 1050726021 | John Rice | dud |
| Jul 26 2005 01:48:34:620PM | 1050726022 | John Rice | 0.6 MA, 2.82 T EDA H-mode ITB, held steady by on axis 2nd harmonic heating |
| Jul 26 2005 02:00:07:667PM | 1050726023 | John Rice | 0.7 MA, 2.82 T EDA H-mode ITB, held steady by on axis 2nd harmonic heating beta N of 1.6 |
| Jul 26 2005 02:27:57:900PM | 1050726025 | John Rice | 0.7 MA, 2.82 T EDA H-mode ITB no on axis 2nd harmonic heating beta N of 1.5 |
| Jul 26 2005 02:40:27:853PM | 1050726026 | John Rice | 0.8 MA, 2.82 T EDA H-mode ITB? on axis 2nd harmonic heating beta N of 1.5 |
| Jul 26 2005 02:56:09:963PM | 1050726027 | John Rice | 0.8 MA, 2.7 T EDA H-mode ITB? on axis 2nd harmonic heating beta N of 1.5 |
| Jul 26 2005 03:06:36:480PM | 1050726027 | John Rice | 0.8 MA, 2.9 T EDA H-mode ITB? on axis 2nd harmonic heating beta N of 1.5 |
| Jul 26 2005 03:06:44:450PM | 1050726028 | John Rice | 0.8 MA, 2.9 T EDA H-mode ITB? on axis 2nd harmonic heating beta N of 1.5 |
| Jul 26 2005 03:19:47:853PM | 1050726029 | John Rice | 0.8 MA, 3.1 T EDA H-mode ITB? no on axis 2nd harmonic heating |
| Jul 26 2005 03:32:21:090PM | 1050726030 | John Rice | 0.8 MA, 3.3 T EDA H-mode ITB? no on axis 2nd harmonic heating |
| Jul 26 2005 03:47:24:510PM | 1050726031 | John Rice | 0.8 MA, 3.8 T EDA H-mode no ITB no on axis 2nd harmonic heating |
| Jul 26 2005 03:53:15:510PM | 1050726031 | John Rice | 0.8 MA, 3.8 T EDA H-mode ITB no on axis 2nd harmonic heating |
| Jul 26 2005 04:01:38:433PM | 1050726032 | John Rice | 0.8 MA, 3.9 T EDA H-mode ITB no on axis 2nd harmonic heating |
| Jul 26 2005 04:13:58:760PM | 1050726033 | John Rice | 0.6 MA, 2.7 T EDA H-mode ITB on axis 2nd harmonic heating |
| Jul 26 2005 04:22:40:900PM | 1050726034 | John Rice | fiz |
| Jul 26 2005 04:23:21:417PM | 1050726034 | John Rice | that like died |
| Jul 26 2005 04:40:18:450PM | 1050726035 | John Rice | dud |
| Jul 26 2005 04:51:41:400PM | 1050726036 | John Rice | 0.6 MA, 2.7 T EDA H-mode with 2nd harmonic heating only |
| Jul 26 2005 05:03:46:120PM | 1050726037 | John Rice | 0.7 MA, 2.7 T EDA H-mode with 2nd harmonic heating only |
| Physics Operator Comments | |||
| Jul 26 2005 09:11:37:933AM | Earl Marmar | Overnight boronization was accomplished. However, the magnetron had a problem, and there was only 1 hour ECDC in He, 1/2 hour in deuterium | |
| Jul 26 2005 09:10:17:027AM | 1050726001 | Earl Marmar | Start with a 5.2 tesla, 1 MA shot to evaluate boroniziation
load from 1050725010 reduce prepuff by 2 msec (to 20 msec) PG2 (He-3) to 100 msec and enabled fizzle; fields look ok |
| Jul 26 2005 09:33:54:700AM | 1050726002 | Earl Marmar | reduce prefill puff by 3 msec to 17 msec
plasma startup looks ok short H-mode, then J-port faults neutral pressure relatively high |
| Jul 26 2005 09:46:48:293AM | 1050726003 | Earl Marmar | load segment 2 from 1040506023 (3.4 tesla, 500 kA)
recalc Ip predictor remove clearin offset turn off He-3 puff plasma disrupted near OH1 crossover PF breaker pulled (after the disruption?) |
| Jul 26 2005 10:02:29:137AM | 1050726004 | Earl Marmar | no pcs changes
similar disruption, slightly earlier |
| Jul 26 2005 10:10:35:323AM | 1050726005 | Earl Marmar | delay and reduce a-coil
Ip to 600 kA disable Argon/neon puff plasma nice steady H-mode, Prad decreasing with time Prf 1.5 MW, all J |
| Jul 26 2005 10:31:08:200AM | 1050726006 | Earl Marmar | increase outer gap (reduce RCUR 2 mm)
decrease toroidal field to 3.2 tesla enable argon/neon, 40 msec puff (had been 60 msec) plasma toggling between H and L mode |
| Jul 26 2005 10:41:40:997AM | 1050726007 | Earl Marmar | lower Ip to 550 kA
plasma similar H/L toggling disrupt after lithium pellet (1.4 s) |
| Jul 26 2005 10:56:28:620AM | 1050726008 | Earl Marmar | disable argon/neon puff
keep RF on until 1.5 seconds plasma nice steady H-mode; hints of peaking near the end of the RF pulse, and especially just after RF turnoff (1.5 seconds) H89 ~ 1.7, H98y2 ~ .95 |
| Jul 26 2005 11:11:33:760AM | 1050726009 | Earl Marmar | reduce TF to 3.0 tesla
Ip to 500 kA plasma nice steady H-mode small injection at 1.09 seconds (OH1 cross-over), takes a temporary bite out of the stored energy ITB sitings on Thomson profiles |
| Jul 26 2005 11:21:51:793AM | 1050726010 | Earl Marmar | TF to 2.8 tesla
plasma steady H-mode definite ITB density and impurity peaking one RF trip, followed by increased rate of Prad rise |
| Jul 26 2005 11:27:51:103AM | 1050726011 | Earl Marmar | no pcs changes
plasma less steady, multiple RF trips, but still peaking |
| Jul 26 2005 11:50:27:340AM | 1050726012 | Earl Marmar | no pcs changes
plasma 2 H-modes less peaking |
| Jul 26 2005 04:33:47:293PM | 1050726013 | Earl Marmar | TF to 2.6 tesla
plasma |
| Jul 26 2005 12:13:35:463PM | 1050726014 | Earl Marmar | no pcs changes
try to add E-port in H-mode (second harmonic hydrogen on-axis) plasma got E-port, seemed to keep Te up in the center still peaking through the H-mode disrupt at 1.5 seconds |
| Jul 26 2005 12:26:34:933PM | 1050726015 | Earl Marmar | no pcs changes
E-port off plasma 2 H-modes, little or no peaking (ELM-freeish) |
| Jul 26 2005 12:37:23:887PM | 1050726016 | Earl Marmar | Ip to 450 kA
plasma multiple H-modes; some peaking during the first H-mode |
| Jul 26 2005 12:49:19:183PM | 1050726017 | Earl Marmar | TF to 2.8 tesla
plasma H-modes, not steady |
| Jul 26 2005 01:00:07:213PM | 1050726018 | Earl Marmar | raise target density, nl_04 to 6e19
plasma steady H-mode peaking, which appears arrested by E-port |
| Jul 26 2005 01:15:14:917PM | 1050726019 | Earl Marmar | no pcs changes
plasma no E-port multiple H-modes first H-mode peaks until back transition |
| Jul 26 2005 01:29:25:777PM | 1050726020 | Earl Marmar | no pcs changes
E-port should be back on plasma first h-mode peaking; E-port does not appear to slow the peaking |
| Jul 26 2005 01:36:58:527PM | 1050726021 | Earl Marmar | Ip to 600 kA
target nl_04 to 8e19 dud |
| Jul 26 2005 04:32:29:700PM | 1050726022 | Earl Marmar | add 2 msec to prefill puff (now 19 msec)
plasma steady h-mode |
| Jul 26 2005 02:08:28:027PM | 1050726023 | Earl Marmar | Ip to 700 kA
target nl_04 to 9.3e19 plasma long H-mode, then J-port has a fault disrupt at 1.38 s |
| Jul 26 2005 02:18:03:620PM | 1050726024 | Earl Marmar | no pcs changes
plasma steady H-mode similar to 23; no J-port fault disrupt 1.4 second (q_95 = 3, also losing the sawteeth) |
| Jul 26 2005 02:32:31:527PM | 1050726025 | Earl Marmar | increase A-coil demand by 500 amp
E-port off for this shot plasma long H-mode disrupt at 1.33 seconds |
| Jul 26 2005 02:45:41:950PM | 1050726026 | Earl Marmar | Ip to 800 kA
target nl_04 to 1.06e20 plasma H-mode Beta_toroidal gets to 2% disrupt at 1.37 s |
| Jul 26 2005 02:58:05:683PM | 1050726027 | Earl Marmar | TF to 2.7 tesla
plasma H-mode q_95 = 2.55 disrupt at 1.29 |
| Jul 26 2005 03:11:33:073PM | 1050726028 | Earl Marmar | TF to 2.9 tesla
plasma H-mode disrupt at 1.41 s |
| Jul 26 2005 03:23:50:760PM | 1050726029 | Earl Marmar | TF to 3.1 tesla
turn off E-port plasma H-mode no obvious peaking Li pellet kills it at 1.6 seconds |
| Jul 26 2005 03:37:31:353PM | 1050726030 | Earl Marmar | TF 3.3 tesla
plasma H-mode disrupt after Li pellet at 1.6 s |
| Jul 26 2005 03:55:38:010PM | 1050726031 | Earl Marmar | TF 3.8 tesla
plasma nice steady H-mode, possible some peaking disrupts after Li pellet (1.6 s) |
| Jul 26 2005 04:07:43:073PM | 1050726032 | Earl Marmar | TF to 3.9 tesla
plasma long H-mode definitely peaking |
| Jul 26 2005 04:17:27:637PM | 1050726033 | Earl Marmar | TF to 2.7 tesla
Ip to 0.6 MA target nl_04 to 8e19 plasma h-mode |
| Jul 26 2005 04:26:28:137PM | 1050726034 | Earl Marmar | no pcs changes
late breakdown, made it to 130 kA and then died |
| Jul 26 2005 04:37:21:823PM | 1050726035 | Earl Marmar | reduce prefill puff by 1 msec to 18 msec
dud |
| Jul 26 2005 04:57:08:620PM | 1050726036 | Earl Marmar | increase prefill puff by 2 msec to 20 msec
plasma E-port only 2'nd harmonic hydrogen, H-mode |
| Jul 26 2005 05:11:08:370PM | 1050726037 | Earl Marmar | Ip to 700 kA
target nl_04 to 9.3e19 plasma E-port only (2'nd harmonic H) H-mode disrupt at 1.33 s; q_95 =2.9 |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:04:27:830AM | Plasma | Ok | |
| 2 | 09:16:53:323AM | Plasma | Ok | |
| 3 | 09:33:24:137AM | Plasma | Bad | self powered circuit oh1 opened PF breaker |
| 4 | 09:50:36:340AM | Plasma | Ok | |
| 5 | 10:03:05:400AM | Plasma | Ok | |
| 6 | 10:18:46:997AM | Plasma | Ok | |
| 7 | 10:31:04:793AM | Plasma | Ok | |
| 8 | 10:43:34:527AM | Plasma | Ok | |
| 9 | 10:57:08:807AM | Plasma | Ok | |
| 10 | 11:09:47:667AM | Plasma | Ok | |
| 11 | 11:23:06:450AM | Plasma | Ok | |
| 12 | 11:36:35:870AM | Plasma | Ok | |
| 13 | 11:49:38:650AM | Plasma | Ok | |
| 14 | 12:02:31:340PM | Plasma | Ok | |
| 15 | 12:15:05:933PM | Plasma | Ok | |
| 16 | 12:27:37:307PM | Test | Ok | |
| 17 | 12:40:12:213PM | Plasma | Ok | |
| 18 | 12:52:45:807PM | Plasma | Ok | |
| 19 | 01:05:01:887PM | Plasma | Ok | |
| 20 | 01:17:34:463PM | Plasma | Ok | |
| 21 | 01:30:11:293PM | Plasma | Ok | |
| 22 | 01:42:43:557PM | Plasma | Ok | |
| 23 | 01:55:10:917PM | Plasma | Ok | |
| 24 | 02:07:47:027PM | Plasma | Ok | |
| 25 | 02:20:23:823PM | Plasma | Ok | |
| 26 | 02:33:04:167PM | Plasma | Ok | |
| 27 | 02:45:45:900PM | Plasma | Ok | |
| 28 | 03:02:22:103PM | Plasma | Ok | |
| 29 | 03:14:51:277PM | Plasma | Ok | |
| 30 | 03:27:50:103PM | Plasma | Ok | |
| 31 | 03:43:30:277PM | Plasma | Ok | |
| 32 | 03:56:02:870PM | Plasma | Ok | |
| 33 | 04:08:33:027PM | Plasma | Ok | |
| 34 | 04:21:03:510PM | Plasma | Ok | |
| 35 | 04:33:45:557PM | Plasma | Ok | |
| 36 | 04:46:25:370PM | Plasma | Ok | |
| 37 | 04:59:32:650PM | Plasma | Ok | |