| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yijun Lin |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Cochran,Bill Byford,Bill Parkin |
| Engineering Operator Run Comment |
| MP 438 J Antenna Evaluation: Operation without Faraday Screen |
| Session Leader Plans |
| Entered: Dec 1 2005 08:41:47:457AM |
| Author: Yijun Lin |
| SL-plan Thursday 01-Dec-2005
MP 438 J Antenna Evaluation: Operation without Faraday Screen Session leader: Y. Lin Physics operator: E. Marmar Boronization overnight (to R = 103 cm) prior to this run. (The boronization overnight prior to this run: Scan resonance from 50 to 95 cm, dwell at 70 cm 100% magnetron duty factor Follow with 4 hours helium-4 ECDC and as much D_2 ECDC as possible, stopping by 7:30 am.) ICRF Setup: All transmitters to run-on by 8:30 am. Important Diagnostics: magnetics, impurity spectroscopy (Mo and Cu), video monitors for antennas, bolometry, H/D Goal: 1. Evaluate J-antenna post-boronization. Are the power and voltage handling capabilities compromised? Is it difficult to recover from boronization? 2. Need to check the H-mode quality and also see whether boronization can reduce the Cu impurities from J-antenna. 3. Can we get good performance plasmas at high power: at 1 MW plasma current, 175 kJ at 3 MW, 215 kJ at 4 MW and > 250 kJ at 5 MW? (First chance to set a new record since 1050422!) Plan: 1. Run fiducial discharge (1 MA, 5.2 T, nel=0.9e20 m^-2) until all antennas are fully recovered from boronization (~ 1.5 MW per transmitter). 2. H-mode threshold comparison. Ramp-up to 2.5 MW, then flat. 3. H-mode quality comparison at different power levels: 2, 2.5 and 3 MW. 4. If all antennas work well, and Prad is small, run a couple of shots with all antennas together (up to 5 MW), and see how much Wtot we can get. 5. Antenna comparison at different currents (0.6, 0.8, and 1.2 MA), Prf at 2 MW. 6. Antenna comparison at different outer gaps (0.5, 1, 1.5, and 2 cm). Prf slow ramp-up to 2 MW. 7. Antenna comparison at different densities (nl = 0.7, 0.9, 1.1 and 1.3 e20m^-2). Prf at 2 MW. 8. If time allows, we will run USN plasmas. |
| Physics Operators Plans |
| Entered: Dec 1 2005 08:57:50:940AM |
| Author: Earl Marmar |
| Physop plan and Engineering setup for Thursday December 1, 2005
MP 438 J Antenna Evaluation: Operation without Faraday Screen Session leader: Y. Lin Physics operator: E. Marmar Boronization overnight prior to this run: Scan resonance from 50 to 95 cm, dwell at 70 cm 100% magnetron duty factor Followed with 4 hours helium-4 ECDC and 1 hour D_2 ECDC, stopped at 8:30 am. ICRF Setup: All transmitters to run-on by 8:30 am. The run is scheduled to start at 9:00 am, and finish at 5:00 pm Important Diagnostics: magnetics, impurity spectroscopy (Mo and Cu), video monitors for antennas, bolometry, H/D Power system setup as on 1051129007 Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar + 2 psi Ne Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi D2 Leave DISABLED Enable Z-bolo shutter Enable ECE, VUV gate valves assuming no vacuum problems Do not enable DNB gate valve at the beginning of the day. We will want both TMP#1 and TMP#2 gate valves open for pulses. |
| Session Leader Summaries |
| Entered: Dec 2 2005 09:06:44:867AM |
| Author: Yijun Lin |
| Boronization recovery: D and E antennas were recovered from boronization as usual (took ~7 shots back to 1.5 MW per transmitter). J antenna was much slower. (Note the boronization was only done to R = 95 cm instead of 103 cm called for by the original plan). It cannot stay for long at > 2 MW the whole day. It ran better later in the day, but the boron layer was also worn out later in the day. The experience suggests that we may have to limit the R range of boronization in the future to have less boron deposited to the J-antenna.
Neutral pressure limit: One of the parameter that was limiting J antenna operation is the lower neutral pressure threshold than last campaign. This antenna could not start at P > 0.2 mTorr (f-side neutral pressure) for 1 MA plasmas today. The limit was at 0.3 mTorr or above in previous campaigns with Faraday screen. Note 0.2 mTorr is almost always reached later in the nl > 0.8-1.0 e20m^-2 and 1 MA discharges. This lowered threshold was seriously limiting the usefulness of J-antenna in standard EDA H-modes. Plasma-antenna interaction: In some early shots (e.g., 12 and 13), plasma interaction on strap #3 near the gap of the ground bridge was observed. Similar interaction was observed on Strap #1 last week, but not today. The antenna became quiet as seen by the J-antenna camera view later in the day. Impurity level: Ti was observed on some shots associated with D-antenna. Mo was there for all antenans. Cu was also observed with all antennas. Cu level was up with higher J-antenna power. However, it was also present and at a level not small when D and E was on. (Cu was observed yesterday with Ohmic run also). Apparently, the copper that was only seen when J-antenna was powered a couple weeks ago is now all around the machine. Boronization didn't reduce its level effectively. H-mode quality: the comparison was done only at 2 MW level since J-antenna was not able to sustain at above 2 MW. Moreover, since J-antenna was limited by the neutral pressure later in the discharges, we were only able compare with D and E at different shots. The finding is about the same as what we knew pre-boronization. The stored energy was lower by ~10% at the same power at 1 MA. Comparison at 1.2 MA and 0.8 MA was inconclusive because faults in J-antenna. Positive news: It is the first run day in this campaign without any transmitter problems/glitches. |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Dec 1 2005 09:18:13:893AM | 1051201001 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN D+E at 1.1-1.4 sec, ramp to 2.4 MW total J at .6 to .9 sec, ramp to 2.4 MW. Result: plasma. All antennas ran. many faults. (No J antenna view) next: repeat |
| Dec 1 2005 09:27:11:707AM | 1051201002 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN D+E at 1.1-1.4 sec, ramp to 2.4 MW total J at .6 to .9 sec, ramp to 2.4 MW. Result: plasma. All antennas ran. many faults. J antenna seems to be limited by neutral pressure. next: Raise antenna power. (lower nl by 10%. It is now at 1.0) repeat |
| Dec 1 2005 09:43:08:987AM | 1051201003 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN D+E at 1.1-1.4 sec, ramp to 2.4 MW total J at .6 to .95 sec, ramp to 2. MW. Result: plasma. All antennas ran. many faults. J antenna had more trouble than D and E recovering from boronization. Titanium appeared again! (see Matt Reinke's entry) next: repeat (lower J power to let it run) |
| Dec 1 2005 09:49:31:630AM | 1051201004 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN D+E at 1.1-1.4 sec, ramp to 2.4 MW total J at .6 to .95 sec, ramp to 1. MW. Result: plasma. All antennas ran. fewer faults from D and E. J had some faults at 1 MW. next: repeat. raise J power and lengthen J pulse to get it conditioned. |
| Dec 1 2005 10:03:10:080AM | 1051201005 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN D: 1.3 MW @ 1.-1.5s. E: 1.3 MW @ 1.-1.4s J: ramping up to 2.0 MW @ 0.6-1.4 s. Result: plasma. H modes with D and E on. H-mode with J only at 1.2 MW. next: repeat. |
| Dec 1 2005 10:21:01:080AM | 1051201006 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN D: 1.4 MW @ 1.-1.5s. E: 1.4 MW @ 1.-1.4s J: ramping up to 2.4 MW @ 0.6-1.4 s. Result: plasma. H-modes J-antenna still had trouble. next: repeat. From mlreinke: "The Ti injections show up after E shuts off and are sustatained over the period where D is on transiently. This should localize the Ti to D-port, which is not suprising. The Cu during the D&E phase is brighter than when J is on indicating some spreading has begun. " |
| Dec 1 2005 10:24:56:580AM | 1051201007 | Yijun Lin | Dud |
| Dec 1 2005 10:41:14:550AM | 1051201008 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN D: 1.4 MW @ 1.2-1.5s. E: 1.4 MW @ 1.2-1.5s J: ramping up to 2.4 MW @ 0.6-1.4 s. Result: plasma. a long H-modes J-antenna still had trouble. next: repeat. shorten D and E (they are close to being conditioned). |
| Dec 1 2005 10:57:01:207AM | 1051201009 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN D: 1.4 MW @ 1.3-1.5s. E: 1.4 MW @ 1.3-1.5s J: ramping up to 2.4 MW @ 0.6-1.5 s. Result: plasma. a long H-modes J-antenna still had trouble, but ran longer in H-mode 160 kJ at D+E = 3 MW. next: repeat. |
| Dec 1 2005 11:14:31:737AM | 1051201010 | Yijun Lin | Antennas recovery after boronization.
Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN D: 1.4 MW @ 1.3-1.5s. E: 1.4 MW @ 1.3-1.5s J: ramping up to 2.4 MW @ 0.6-1.5 s. Result: plasma. a long H-modes J-antenna still had trouble. (Arcing in the gap of strap #3?) next: repeat. |
| Dec 1 2005 11:20:26:457AM | 1051201011 | Yijun Lin | Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1.4 MW @ 1.3-1.5s. E: 1.4 MW @ 1.3-1.5s J: ramping up to 2.4 MW @ 0.6-1.5 s. Result: plasma. long H-modes J-antenna needs more conditioning. next: repeat. |
| Dec 1 2005 11:40:54:003AM | 1051201012 | Yijun Lin | Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1.4 MW @ 1.3-1.5s. E: 1.4 MW @ 1.3-1.5s J: ramping up to 2.4 MW @ 0.6-1.5 s. Result: plasma. long H-modes J-antenna needs more conditioning. J-antenna view shows plasma interaction on strap #3 (e.g., frame 34, 1.158 sec). (Used to be on strap #1.) next: Increase right gap by 5 mm and see whether J-antenna gets better. |
| Dec 1 2005 11:48:55:973AM | 1051201013 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1.2 MW @ 1.3-1.5s. E: 1.2 MW @ 1.3-1.5s J: ramping up to 2.4 MW @ 0.6-1.5 s. Result: plasma. long H-modes J-antenna needs more conditioning. (larger right gap, but not much change in J-antenna view. Still lighting up on strap #3). next: repeat. |
| Dec 1 2005 12:16:36:643PM | 1051201015 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: steps to 1.25 MW @ .7-1.5s E: steps to 1.25 MW @ .7-1.5s J: steps to 2.5 MW @ 0.7-1.5 s. Result: plasma. disruption at .91 sec next:repeat |
| Dec 1 2005 12:30:23:253PM | 1051201016 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: step to 1.2-1.4 MW @ .7-1.2s E: step to 1.2-1.4 MW @ .7-1.2s J: step to 2-2.4 MW @ 0.7-1.5 s. Result: plasma. next: repeat with J antenna only to get it conditioned. |
| Dec 1 2005 12:39:44:520PM | 1051201017 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D:off E: off J: step to 2-2.4 MW @ 0.7-1.5 s. Result: plasma. next: repeat |
| Dec 1 2005 12:56:57:080PM | 1051201018 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D:off E: off J: step to 2.4-2.8 MW @ 0.7-1.5 s. Result: plasma. (no J antenna camera view) next: repeat |
| Dec 1 2005 01:07:30:253PM | 1051201019 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D:off E: off J: step to 2.4-2.8 MW @ 0.7-1.5 s. Result: plasma. (No J antenna view. Josh is trying to fix it) next: repeat |
| Dec 1 2005 01:16:13:660PM | 1051201020 | Yijun Lin | Dud |
| Dec 1 2005 01:35:01:190PM | 1051201021 | Yijun Lin | Dud |
| Dec 1 2005 01:41:38:980PM | 1051201022 | Yijun Lin | No TF. |
| Dec 1 2005 02:01:52:593PM | 1051201023 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D:off E: off J: step to 1.6-2.5 MW @ 0.6-1.5 s. Result: plasma. (quiet in the J antenna view) next: Compare H-mode quality at 2 MW, J and D+E. |
| Dec 1 2005 02:12:28:343PM | 1051201024 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: MW, 1.1-1.35 sec E: 1 MW, 1.1-1.35 sec J: 2 MW @ 0.65-.9 s. Result: plasma. distupted at 0.87 sec Wtot at 108 kJ with J = 2 MW (faults) next: repeat |
| Dec 1 2005 02:32:32:483PM | 1051201025 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: MW, 1.1-1.35 sec E: 1 MW, 1.1-1.35 sec J: 2 MW @ 0.65-.9 s. Result: plasma. Wtot at 112 kJ with J = 2 MW (still rising) Wtot at 135 kJ with D+E = 2 MW (Cu lines in both H-modes). next: swap order. |
| Dec 1 2005 02:42:23:030PM | 1051201026 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1 MW, 0.65-.9 s. E: 1 MW, 0.65-.9 s. J: 2 MW 1.1-1.35 sec Result: plasma J behaved like hitting neutral pressure limit, but neutral pressure was only 0.2 mtorr (don't know why) Wtot at 120 kJ with D+E = 2 MW (big injection at 0.4 sec) next: repeat. |
| Dec 1 2005 02:53:55:593PM | 1051201027 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1 MW, 0.65-.9 s. E: 1 MW, 0.65-.9 s. J: 2 MW 1.1-1.35 sec Result: plasma Wtot at 136 kJ with D+E = 2 MW next: swap the order again and hope J can run earlier in the shot. |
| Dec 2 2005 11:03:17:443AM | 1051201028 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1 MW, 1.1-1.35 s. E: 1 MW, 1.1-1.35 s. J: 2 MW .6-.95 sec Result: plasma Wtot at 128 kJ with D+E = 2.1 MW Wtot at 117 kJ with J = 2 MW Compare with shot 27, D+E got 136 kJ at 2.1 MW. the difference between D+E and J seems to be about 10% (similar to pre-boronization) next: stack all antennas to 4 MW and see how much Wtot we can get. |
| Dec 1 2005 03:25:06:903PM | 1051201029 | Yijun Lin | b>Request: Ip ~ 1 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1 MW, .65-1.2 s. E: 1 MW, .65-1.2 s. J: 2 MW .7-1.2 sec (heating phase [0,pi,0,pi], digital phase 310 degree) Result: plasma Max Wtot 162 kJ with Ptot = 4 MW next: 1.2 MA. compare D+E and J at 2 MW. |
| Dec 2 2005 11:02:24:413AM | 1051201030 | Yijun Lin | b>Request: Ip ~ 1.2 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: 1 MW, 1.1-1.35s. E: 1 MW, 1.1-1.35 s. J: 2 MW .65-.9 sec Result: plasma Wtot 127 kJ (still rising) with J = 2 MW Wtot 139 kJ (still rising) with D+E = 2.1 MW next: repeat. |
| Dec 2 2005 11:01:59:053AM | 1051201031 | Yijun Lin | b>Request: Ip ~ 1.2 MA, Bt ~ 5.2 T, nl04 ~ 1e20m^-2, LSN
D: .95 MW, 1.1-1.35s. E: .95 MW, 1.1-1.35 s. J: 2 MW .65-.9 sec Result: plasma Wtot 121 kJ with J = 2 MW (faulting) Wtot 151 kJ with D+E = 1.9 MW next: raise density by 10% to make the H-mode more EDA like. |
| Dec 1 2005 04:03:23:983PM | 1051201032 | Yijun Lin | Dud |
| Dec 1 2005 04:10:26:873PM | 1051201033 | Yijun Lin | Early disruption |
| Dec 1 2005 04:25:18:047PM | 1051201034 | Yijun Lin | b>Request: Ip ~ 1.2 MA, Bt ~ 5.2 T, nl04 ~ 1.1e20m^-2, LSN
D: .95 MW, 1.1-1.35s. E: .95 MW, 1.1-1.35 s. J: 2 MW .65-.9 sec Result: plasma Wtot 121 kJ with J = 1.9 MW (faulting) Wtot 142 kJ with D+E = 1.9 MW next: give up on 1.2 MA. H-modes won't stay. Next 0.8 MA. |
| Dec 1 2005 04:39:38:700PM | 1051201035 | Yijun Lin | Request: Ip ~ .8 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN
D: .95 MW, 1.1-1.35s. E: .95 MW, 1.1-1.35 s. J: 2 MW .65-.9 sec Result: plasma J-port could not start (neutral pressure limit?) Wtot 90 kJ with D+E = 1.9 MW next: repeat with lower density |
| Dec 1 2005 04:56:55:593PM | 1051201036 | Yijun Lin | Request: Ip ~ .8 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN
D: .95 MW, 1.1-1.35s. E: .95 MW, 1.1-1.35 s. J: 2 MW .65-.9 sec Result: plasma 87 kJ with J at 1.9 MW Wtot 103 kJ with D+E = 1.9 MW next: swap order and repeat |
| Dec 1 2005 05:07:11:903PM | 1051201037 | Yijun Lin | Request: Ip ~ .8 MA, Bt ~ 5.2 T, nl04 ~ .9e20m^-2, LSN
D: .95 MW, .65-.9s. E: .95 MW, .65-.9s. J: 2 MW 1.1-1.35 sec Result: plasma 78 kJ with J at 1.9 MW Wtot 109 kJ with D+E = 1.9 MW next: end of run |
| Physics Operator Comments | |||
| Dec 1 2005 09:25:30:020AM | 1051201001 | Earl Marmar | load from 1051122001 (1 MA LSN fiducial)
import segment 1 from 1051129025 for startup guess 15 msec for prefill puff (post-boronization) plasma startup bounced; fill looks very low; no hards RF was ratty, some short h-mode(s) during the second RF pulses dPrad/dt not particularly low H/(H+D) ~ 4% |
| Dec 1 2005 09:26:18:363AM | 1051201002 | Earl Marmar | add 1 msec to prefill puff (now 16 msec)
plasma better startup more sustained H-mode during second RF pulses; RF still ratty H/(H+D)~3% |
| Dec 1 2005 09:39:27:503AM | 1051201003 | Earl Marmar | cell access before this shot for camera shutters
decrease nl_04 target to 8e19 (from 9e19) plasma small bounce on startup; hards low RF still ratty H/(H+D)~3.5% |
| Dec 1 2005 09:55:21:660AM | 1051201004 | Earl Marmar | add 1 msec to prefill puff (now 17 msec)
plasma startup ok RF a little better H/(H+D)~5% big increase in radiated power during H-mode at 1.18 seconds |
| Dec 1 2005 10:07:20:470AM | 1051201005 | Earl Marmar | no pcs changes
plasma small bounce on startup; hards ok Second H-mode is starting to be a contender, then hit by jump up in radiated power H/(H+D)~4% |
| Dec 1 2005 10:19:36:253AM | 1051201006 | Earl Marmar | no pcs changes
plasma startup ok RF ratty H/(H+D)~3% |
| Dec 1 2005 10:25:33:487AM | 1051201007 | Earl Marmar | turn on Ar+Ne (30 msec PG4)
increase nl_04 target to 9e19 (from 8e19) dud; fields look ok |
| Dec 1 2005 10:43:30:720AM | 1051201008 | Earl Marmar | raise prefill puff 2 msec (now 19 msec)
plasma 1 bounce on startup; some hards Perhaps a little more EDA-ish; still many radiation increases RF ratty H/(H+D)~3 to 4% |
| Dec 1 2005 11:02:17:470AM | 1051201009 | Earl Marmar | add 1 msec to prefill puff (now 20 msec)
plasma startup ok second H-mode was decent until increase in radiated power H/(H+D)~4% |
| Dec 1 2005 11:09:22:927AM | 1051201010 | Earl Marmar | no pcs changes
plasma startup ok many rf trips H/(H+D)~7 to 10 % |
| Dec 1 2005 11:23:36:380AM | 1051201011 | Earl Marmar | no pcs changes
plasma startup ok better rf still getting significant increases in Prad at times during h-modes H/(H+D)~5% |
| Dec 1 2005 11:39:11:567AM | 1051201012 | Earl Marmar | no pcs changes
plasma startup ok H/(H+D)~4% |
| Dec 1 2005 11:50:47:630AM | 1051201013 | Earl Marmar | increase right gap about 6 mm (reduce RCUR 3 mm)
plasma startup ok 3'rd H-mode looks quite nice (H89 ~ 1.6 and steady, Prf (D+E) ~ 2.2 MW) H/(H+D)~4% |
| Dec 1 2005 12:05:02:783PM | 1051201014 | Earl Marmar | no pcs changes
plasma 1 bounce to the outside on startup; hards ok second h-mode is steady, H89 ~ 1.7, Prf ~ 2.5 MW H/(H+D)~3.7% |
| Dec 1 2005 12:20:33:957PM | 1051201015 | Earl Marmar | add 1 msec to prefill puff (now 21 msec)
add 10 msec to Ar/Ne PG1 puff (now 40 msec) plasma startup ok big step increase in radiated power at .835 s, disrupt at .92 s H/(H+D)~4.5% |
| Dec 1 2005 12:35:04:630PM | 1051201016 | Earl Marmar | reduce prefill puff by 1 msec (to 20 msec)
plasma startup ok 4 MW RF for a short time; big increases in radiated power H/(H+D)~4 to 5% |
| Dec 1 2005 12:42:09:300PM | 1051201017 | Earl Marmar | no pcs changes
plasma startup ok H/(H+D)~5% |
| Dec 1 2005 12:54:49:033PM | 1051201018 | Earl Marmar | no pcs changes
plasma startup ok H/(H+D)~4.5% |
| Dec 1 2005 01:09:56:470PM | 1051201018 | Earl Marmar | no pcs changes
plasma startup ok H/(H+D)~4.5% |
| Dec 1 2005 01:17:06:877PM | 1051201018 | Earl Marmar | no pcs changes
plasma startup ok H/(H+D)~4.5% |
| Dec 1 2005 01:07:59:160PM | 1051201019 | Earl Marmar | no pcs changes
plasma startup ok H/(H+D)~4.5% |
| Dec 1 2005 01:17:04:097PM | 1051201020 | Earl Marmar | no pcs changes
dud fields look ok |
| Dec 1 2005 01:31:11:410PM | 1051201021 | Earl Marmar | add 2 msec to prefill puff (now 22 msec)
dud Bz looks too positive on this one |
| Dec 1 2005 01:43:24:247PM | 1051201022 | Earl Marmar | EF4 10 amp more negative for t<0
power supply dud; no toroidal field |
| Dec 1 2005 02:07:45:873PM | 1051201023 | Earl Marmar | no pcs changes
plasma startup a little bouncy H/(H+D)~5% |
| Dec 1 2005 02:19:29:500PM | 1051201024 | Earl Marmar | no pcs changes
plasma startup bounces; some hards disrupts at 0.88 s H/(H+D)~4.5% |
| Dec 1 2005 02:33:15:297PM | 1051201025 | Earl Marmar | no pcs changes
(raise the fill because of the bounce, lower it because of the disruption) plasma startup ok, no hards decent steady h-mode with D+E at 2 MW H/(H+D)~4.5% |
| Dec 1 2005 02:46:26:170PM | 1051201026 | Earl Marmar | no pcs changes
plasma big bounce in startup, a few hards big injection pre-rf (.42 s) nearly killed the shot poor h-mode from D+E (now earlier in shot) H/(H+D)~4.3% |
| Dec 1 2005 02:54:47:560PM | 1051201027 | Earl Marmar | add 1 msec to prefill puff
plasma startup ok decent 1st h-mode (D+E 2MW total) H/(H+D)~6.9% |
| Dec 1 2005 03:08:04:467PM | 1051201028 | Earl Marmar | no pcs changes
plasma bounce on startup; a few hards 2 quasi-decent h-modes (first J at 2 MW, then D+E at 2 MW); second better than first H/(H+D)~4.8% |
| Dec 1 2005 03:29:37:797PM | 1051201029 | Earl Marmar | add 1msec to prefill puff (now 24 msec)
plasma big bounce on startup, some hards 4 MW (all antennas combined), H89 ~ 1.35 H/(H+D)~6.5% |
| Dec 1 2005 03:51:29:890PM | 1051201030 | Earl Marmar | Ip to 1.2 MA
plasma startup ok H/(H+D)~3% |
| Dec 1 2005 03:52:32:827PM | 1051201031 | Earl Marmar | no pcs changes
plasma big bounce in the startup; hards ok H/(H+D)~5.5% |
| Dec 1 2005 03:57:24:403PM | 1051201032 | Earl Marmar | nl_04 target to 1e20 (from 9e19)
argon/neon off for this shot dud; fields look ok |
| Dec 1 2005 04:13:59:390PM | 1051201033 | Earl Marmar | increase prefill puff 2 msec (now 26 msec)
plasma startup ok early disruption (.34 seconds) -- something fell in? |
| Dec 1 2005 04:27:59:577PM | 1051201034 | Earl Marmar | argon/neon back on
plasma startup ok |
| Dec 1 2005 04:47:07:467PM | 1051201035 | Earl Marmar | Ip to 0.8 MA
nl_04 target to .9e20 plasma startup ok H/(H+D)~6% |
| Dec 1 2005 05:00:33:123PM | 1051201036 | Earl Marmar | nl_04 target to 0.7e19
plasma two bounces on startup; some hards H/(H+D)~1% |
| Dec 1 2005 05:36:07:653PM | 1051201037 | Earl Marmar | increase prefill puff by 2 msec (now 28 msec)
plasma startup ok H/(H+D)~3.5% |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:03:42:770AM | Plasma | Ok | |
| 2 | 09:16:10:613AM | Plasma | Ok | |
| 3 | 09:31:15:987AM | Plasma | Ok | |
| 4 | 09:44:27:487AM | Plasma | Ok | |
| 5 | 09:57:04:190AM | Plasma | Ok | |
| 6 | 10:09:47:940AM | Plasma | Ok | |
| 7 | 10:22:45:097AM | Plasma | Ok | |
| 8 | 10:35:15:643AM | Plasma | Ok | |
| 9 | 10:48:18:113AM | Plasma | Ok | |
| 10 | 11:01:02:253AM | Plasma | Ok | |
| 11 | 11:15:32:940AM | Plasma | Ok | |
| 12 | 11:28:23:597AM | Plasma | Ok | |
| 13 | 11:41:53:283AM | Plasma | Ok | |
| 14 | 11:55:41:317AM | Plasma | Ok | |
| 15 | 12:08:28:567PM | Plasma | Ok | |
| 16 | 12:21:10:020PM | Plasma | Ok | |
| 17 | 12:33:51:033PM | Plasma | Ok | |
| 18 | 12:46:35:597PM | Plasma | Ok | |
| 19 | 12:59:06:360PM | Plasma | Ok | |
| 20 | 01:14:35:783PM | Plasma | Ok | |
| 21 | 01:27:14:880PM | Plasma | Ok | |
| 22 | 01:40:03:930PM | Plasma | Ok | |
| 23 | 01:54:51:700PM | Plasma | Ok | |
| 24 | 02:07:51:013PM | Plasma | Ok | |
| 25 | 02:20:50:187PM | Plasma | Ok | |
| 26 | 02:33:30:717PM | Plasma | Ok | |
| 27 | 02:46:40:517PM | Plasma | Ok | |
| 28 | 02:59:55:047PM | Plasma | Ok | |
| 29 | 03:16:12:343PM | Plasma | Ok | |
| 30 | 03:29:10:343PM | Plasma | Ok | |
| 31 | 03:42:26:310PM | Plasma | Ok | |
| 32 | 03:55:07:060PM | Plasma | Ok | |
| 33 | 04:07:56:623PM | Plasma | Ok | |
| 34 | 04:20:40:890PM | Plasma | Ok | |
| 35 | 04:34:45:610PM | Plasma | Ok | |
| 36 | 04:50:59:890PM | Plasma | Ok | |
| 37 | 05:03:29:250PM | Plasma | Ok | |