| Miniproposals | ||||||||||||
|
| Operators | |
| Session leader(s): | Steve Wukitch,Yijun Lin |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| RF High |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:32:617PM |
| Author: To Be Determined |
| Summary: High power RF Best shots: 1030528019 at 800 kA, 1030518030 at 1.2 MA. E port is fine at 1.4 MW. D port is good at 1. MW. J port is good at 1.6 MW (total). Highest total RF power 4.9 MW for 20 ms. Long clean at 4.0 MW in shot 19. Highest stored energy 149 kJ at 1.2 MA current Problems: J3 tuning is a problem. We have to tune it manually. Power level in E power is kind of suspicious. Reducing the target density from 1.0 to 0.9 e20 seemed to significantly enhance the antenna performance. The work on the demodulator yesterday should also help. The antennas are just much better than before. Injection seen from K-side of J-antenna in shot 18. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:18:003PM |
| Author: To Be Determined |
| ---------------------------------------------------------------------------- 1030528xxx marmar PHYSICS_OPERATOR May 28 2003 8:43:58:880AM . . . . . . . . . . . . . . . . . . . . Engineering setup for Wednesday 1030528 MP#326 High Power RF SL: Wukitch/Lin PO: Marmar ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight. Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030514024 (0.8 MA, 5.4 T, lower single null), EXCEPT Leave the asymmetric control coils (C-coils) in the configuration of 1030522022: +Dtop -Dbot -Jtop +Jbot Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV ------------------------------------------------------------------------------- RF Setup: All 4 transmitters in Run On by 08:00. Results: The machine ran well. We had discharges at 0.8, 1.0 and 1.2 MW. The RF got up to ~4MW total for short pulses. H/(H+D) started the day at about 5%, but was above 10% by the end of the run. The disruption on shot 18 (during RF) seemed to cause a step increase in H fraction. Besides raising the current, phsyop tasks included decreasing clearin to reduce both the outer and inner gaps. After an early delay for EF4 cooling and RF turn-on, the first shot had a number of camac/cpci/hybrid problems, which included saturated signals on several hybrid inputs and no EF3 before t=0. The result was a fizzle. Shot 2 was a no-power test. It was not clear what caused the problem; a camac power supply was suspected, but this was not confirmed. After that, there was 1 more fizzle (shot 28), possibly due to a drift in B_R0. We turned on the asymmetric control coils for shot 23 and subsequent. It was not clear if there was any problem with locked modes, but it seemed prudent for the higher plasma currents. Both shots at 1.2 MA ramped all the way down. Scorecard: plasmas 27 fizzles 2 no power 1 total cycles 30 ---------------------------------------------------------------------------- 1030528001 marmar PHYSICS_OPERATOR May 28 2003 9:46:54:010AM . . . . . . . . . . . . . . . . . . . . load from 1030514024; replace nl_zmeter with nl_04 increase Ip to 850 kA reduce prefill puff to 25 msec fizzle; numerous hybrid and cpci problems no EF3 ----------------------------------------------------------------------------- 1030528002 marmar PHYSICS_OPERATOR May 28 2003 10:23:57:903AM . . . . . . . . . . . . . . . . . . . . no power test hybrid signals look ok, although there appear to be some small noise spikes on 8 of the hybrid cpci channels ----------------------------------------------------------------------------- 1030528003 marmar PHYSICS_OPERATOR May 28 2003 10:44:21:630AM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528004 marmar PHYSICS_OPERATOR May 28 2003 10:44:34:020AM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma---------------------------------------------------------------------------- 1030528005 marmar PHYSICS_OPERATOR May 28 2003 11:04:53:700AM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma---------------------------------------------------------------------------- 1030528006 marmar PHYSICS_OPERATOR May 28 2003 11:18:45:090AM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528007 marmar PHYSICS_OPERATOR May 28 2003 12:15:36:580PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma Interferometer lost it at 1.95 seconds, then the gas puff turned full on until 3.0 seconds. This caused the gate valves to close ----------------------------------------------------------------------------- 1030528008 marmar PHYSICS_OPERATOR May 28 2003 12:06:02:700PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528009 marmar PHYSICS_OPERATOR May 28 2003 12:12:51:896PM . . . . . . . . . . . . . . . . . . . . turned nl_04 gain to 0 at 1.8 seconds plasma ----------------------------------------------------------------------------- 1030528010 marmar PHYSICS_OPERATOR May 28 2003 12:32:27:653PM . . . . . . . . . . . . . . . . . . . . lower nl_04 target to 0.8e20 plasma got about 0.9e20 (pre-rf) ----------------------------------------------------------------------------- 1030528011 marmar PHYSICS_OPERATOR May 28 2003 12:40:53:176PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma---------------------------------------------------------------------------- 1030528012 marmar PHYSICS_OPERATOR May 28 2003 1:16:40:400PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528013 marmar PHYSICS_OPERATOR May 28 2003 1:16:53:713PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528014 marmar PHYSICS_OPERATOR May 28 2003 1:25:21:390PM . . . . . . . . . . . . . . . . . . . . increase Ip prog 25 kA plasma ----------------------------------------------------------------------------- 1030528015 marmar PHYSICS_OPERATOR May 28 2003 1:56:56:526PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528016 marmar PHYSICS_OPERATOR May 28 2003 1:57:12:183PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528017 marmar PHYSICS_OPERATOR May 28 2003 2:11:31:620PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528018 marmar PHYSICS_OPERATOR May 28 2003 2:27:17:710PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma disrupt at 1.16 s; J-ant TV shows fireworks at that time ----------------------------------------------------------------------------- 1030528019 marmar PHYSICS_OPERATOR May 28 2003 2:47:54:656PM . . . . . . . . . . . . . . . . . . . . reduce pre-puff by 3 msec plasma bounced early, some hards less heating for 4 MW ICRF; h fraction probably up after the disruption; h/d not available (camac errors) ----------------------------------------------------------------------------- 1030528020 marmar PHYSICS_OPERATOR May 28 2003 2:57:58:206PM . . . . . . . . . . . . . . . . . . . . add 3 msec to prepuff increase Ip demand to 1.05 MA plasma no hards H/(H+D) = 9% ----------------------------------------------------------------------------- 1030528021 marmar PHYSICS_OPERATOR May 28 2003 3:09:29:973PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma disrupt in ramp-down (~800 kA) H/(H+D) = 10% ----------------------------------------------------------------------------- 1030528022 marmar PHYSICS_OPERATOR May 28 2003 3:27:41:250PM . . . . . . . . . . . . . . . . . . . . tweak clearin during rampdown plasma ----------------------------------------------------------------------------- 1030528023 marmar PHYSICS_OPERATOR May 28 2003 3:34:24:900PM . . . . . . . . . . . . . . . . . . . . turn on a-coils: on at 0.5, off at 1.6 +dtop -dbot -jtop +jbot plasma sawteeth seem bigger after 1.4 seconds ----------------------------------------------------------------------------- 1030528024 marmar PHYSICS_OPERATOR May 28 2003 3:53:03:190PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528025 marmar PHYSICS_OPERATOR May 28 2003 4:03:26:723PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma ----------------------------------------------------------------------------- 1030528026 marmar PHYSICS_OPERATOR May 28 2003 4:18:58:520PM . . . . . . . . . . . . . . . . . . . . reduce clearin 5 mm (reduce inner and outer gaps) plasma ----------------------------------------------------------------------------- 1030528027 marmar PHYSICS_OPERATOR May 28 2003 4:38:10:793PM . . . . . . . . . . . . . . . . . . . . decrease clearin another 2 mm plasma ----------------------------------------------------------------------------- 1030528028 marmar PHYSICS_OPERATOR May 28 2003 4:38:40:810PM . . . . . . . . . . . . . . . . . . . . increase Ip demand to 1.25 MA fizzle B_r may be creeping up ----------------------------------------------------------------------------- 1030528029 marmar PHYSICS_OPERATOR May 28 2003 4:54:13:150PM . . . . . . . . . . . . . . . . . . . . reduce B_r offset 0.5 mT (now 0.0000) plasma, 1.2 MA ----------------------------------------------------------------------------- 1030528030 marmar PHYSICS_OPERATOR May 28 2003 5:18:38:170PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma got to Wmhd = 150 kJ H/(H+D) = 9% - |
| Session Leader Comments | |||
| May 29 2003 08:28:45:113AM | Yijun Lin | Best shots: 1030528019 at 800 kA, 1030518030 at 1.2 MA. E port is fine at 1.4 MW. D port is good at 1. MW. J port is good at 1.6 MW (total). Highest total RF power 4.9 MW for 20 ms. Long clean at 4.0 MW in shot 19. Highest stored energy 149 kJ at 1.2 MA current Problems: J3 tuning is a problem. We have to tune it manually. Power level in E power is kind of suspicious. Reducing the target density from 1.0 to 0.9 e20 seemed to significantly enhance the antenna performance. The work on the demodulator yesterday should also help. The antennas are just much better than before. Injection seen from K-side of J-antenna in shot 18. | |
| May 28 2003 10:04:08:600AM | 1030528001 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = 1. x 10^20 m^-2, normal SN diverted. RF request: D: off. E: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.4 - 0.6] ramp-up Result: plasma. fizzle. No RF data (neither cPCI nor CAMAC). All transmitters are ready for the next shot. |
| May 28 2003 10:23:46:373AM | 1030528002 | Yijun Lin | no power shot. No RF data. The RF tree was not included in the pulse file after last week's non-RF runs. Granetz and Wolfe helped include the RF for the next shot. |
| May 28 2003 11:00:14:063AM | 1030528004 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = 1. x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.5- 0.7 MW, ramp-up E: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.4 - 0.6] ramp-up Result: plasma. multiple H-modes D: ran. 4 faults. E: ran. 1 fault. J: ran. bad matching. Faulted out. |
| May 28 2003 11:25:17:593AM | 1030528005 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = 1. x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up E: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.4 - 0.6] ramp-up Result: plasma. multiple H-modes D: ran. 7 faults. E: ran. clean. J: ran. some faults in retries (arcing not cleared?) |
| May 28 2003 11:46:17:490AM | 1030528007 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = 1. x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up E: [0.8, 1.3] sec, 0.6 - 0.8 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.5 - 0.7] ramp-up Result: plasma. multiple H-modes D: ran. 6 faults when starting up. 3 faults later. E: ran. 3 faults near the end. J: ran. many faults in retry in J4. (Arc not cleared up? J4 rise-time much longer than J3. It could be a problem.) |
| May 28 2003 12:00:44:817PM | 1030528008 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = 1. x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up E: [0.8, 1.3] sec, 0.6 - 0.8 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.5 - 0.7] ramp-up Result: plasma. multiple H-modes D: ran. 5 faults. much better in starting up. E: ran. 2 faults near the end J: ran. max faults. Still problems in retry near the end. J4 retry rise-time is about twice as that of J3. Rick and Steve went to the power room to check the rise-time capacitors of J3 and J4. The capacitors were identical. But they changed the capacitor anyway based on the observed rise-time difference. |
| May 28 2003 12:25:18:087PM | 1030528009 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = 1. x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up E: [0.8, 1.3] sec, 0.6 - 0.8 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.5 - 0.7] ramp-up Result: plasma. multiple H-modes D: ran. 7 faults. Many faults in startig up again. E: ran. 3 faults near the end. J: ran. 3 faults, then could not retry. |
| May 28 2003 12:25:07:553PM | 1030528010 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.5 - 0.7 MW, ramp-up E: [0.8, 1.3] sec, 0.6 - 0.8 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.5 - 0.7] ramp-up Result: plasma. multiple H-modes D: ran. 2 faults E: ran. clean J: ran. mostly failed retries. |
| May 28 2003 12:46:05:343PM | 1030528011 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.6 - 0.8 MW, ramp-up E: [0.8, 1.3] sec, 0.7 - 0.9 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.6 - 0.8] ramp-up Result: plasma. multiple H-modes D: ran. 2 faults E: ran. 1 fault J: ran. mostly failed retries. |
| May 28 2003 12:59:22:187PM | 1030528012 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.7 - 0.9 MW, ramp-up E: [0.8, 1.3] sec, 0.8 - 1.0 MW, ramp-up J: [0.6, 1.3] sec, 2 x [0.6 - 0.8] ramp-up Result: plasma. H-mode D: ran. 3 faults E: ran. clean J: ran. failed retries in H-mode. |
| May 28 2003 01:46:28:633PM | 1030528015 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.1 MW, E: [0.8, 1.3] sec, 1.2 MW J: [0.6, 1.3] sec, 2 x 0.8 MW Result: plasma. multiple H-modes D: ran. Max faults E: ran. max faults J: ran. max faults. Next repeat. |
| May 28 2003 01:52:22:250PM | 1030528016 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.1 MW, E: [0.8, 1.3] sec, 1.2 MW J: [0.6, 1.3] sec, 2 x 0.8 MW Result: plasma. multiple H-modes D: ran. 1 fault E: ran. 7 faults J: ran. max faults. J3 match in H-mode still a problem. |
| May 28 2003 02:30:43:770PM | 1030528018 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.2 MW, E: [0.8, 1.3] sec, 1.2 MW J: [0.6, 1.3] sec, 2 x 0.8 MW Result: plasma. H-mode. Disrupted at 1.15 sec D: ran. 5 faults before disruption E: ran. clean J: ran. 8 faults before disruption. 135 kJ stored energy, 4.3 MW (norminal) RF power Injection seen from K-side of J antenna |
| May 28 2003 02:42:09:520PM | 1030528019 | Yijun Lin | Plasma request: 0.8 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.2 MW, E: [0.8, 1.3] sec, 1.2 MW J: [0.6, 1.3] sec, 2 x 0.8 MW Result: plasma. H-mode. D: ran. 2 faults. Xbar fired right after the shot. Spark-gap fired. E: ran. one fault near the very end. J: ran. 7 faults. Much better. 108 kW stored energy. 4.3 MW RF for 200 ms H/D may be higher after last shot. |
| May 28 2003 03:02:13:280PM | 1030528020 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.3 MW, E: [0.8, 1.3] sec, 1.3 MW J: [0.6, 1.3] sec, 2 x 0.9 MW Result: plasma. H-mode. D: ran. max faults E: ran. max faults J: ran. max faults. Possible matching problem of J3 in H-mode. Plasma current increased. |
| May 28 2003 03:11:40:940PM | 1030528021 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.3 MW, E: [0.8, 1.3] sec, 1.3 MW J: [0.7, 1.3] sec, 2 x 0.9 MW Result: plasma. H-mode. disrupted 1.62 sec. D: ran. max faults. Better. E: ran. 7 faults. better. J: ran. max faults. better. 130 kJ stored energy. Max RF power 4.9 MW for 40 ms. |
| May 28 2003 03:25:10:317PM | 1030528022 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.3 MW, E: [0.8, 1.3] sec, 1.3 MW J: [0.7, 1.3] sec, 2 x 0.9 MW Result: plasma. H-mode. D: ran. max faults. E: ran. 1 fault. It is good. J: ran. max faults. Retries problem in J3. Retract the Stub tuner more. Next reduced D and J power |
| May 28 2003 03:38:05:740PM | 1030528023 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 1.0 to 1.2 MW, ramp up. E: [0.8, 1.3] sec, 1.3 MW J: [0.7, 1.3] sec, 2 x (0.8 - 0.9) MW ramp up Result: plasma. H-mode. D: ran. max faults. E: ran. 5 faults. J: ran. max faults. Next lower power on all. Start D earlier to see if D can run itself. |
| May 28 2003 03:50:20:770PM | 1030528024 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.6, 1.3] sec, 1.0 MW. E: [0.8, 1.3] sec, 1.2 MW. J: [0.7, 1.3] sec, 2 x 0.8 MW. Result: plasma. H-mode. D: ran. max faults. ran longer. E: ran. 5 faults J: ran. ran longer. max faults. Next: just repeat. |
| May 28 2003 04:04:57:300PM | 1030528025 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.6, 1.3] sec, 1.0 MW. E: [0.8, 1.3] sec, 1.2 MW. J: [0.7, 1.3] sec, 2 x 0.8 MW. Result: plasma. H-mode. D: ran. max faults. ran longer. E: ran. 1 fault J: ran. ran longer. Next reduce outer gap from 1.5 cm to 1 cm. |
| May 28 2003 04:18:13:880PM | 1030528026 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.7, 1.3] sec, 1.0 MW. E: [0.7, 1.3] sec, 1.2 MW. J: [0.7, 1.3] sec, 2 x 0.8 MW. Result: plasma. H-mode. D: ran. max faults. not getting better. E: ran. 1 fault. J: ran. Max faults. Next lower D and J power to see whether they can stay. |
| May 28 2003 04:27:08:667PM | 1030528027 | Yijun Lin | Plasma request: 1.0 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.7, 1.3] sec, .9 MW. E: [0.7, 1.3] sec, 1.2 MW. J: [0.7, 1.3] sec, 2 x 0.75 MW. Result: plasma. H-mode. D: ran. 3 faults. E: ran. 1 fault J: ran. max faults. much longer. Next shot, 1.2 MA current. Start the RF at 0.8 sec as request by Parker. |
| May 28 2003 04:55:39:023PM | 1030528029 | Yijun Lin | Plasma request: 1.2 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, .9 MW. E: [0.8, 1.3] sec, 1.2 MW. J: [0.8, 1.3] sec, 2 x 0.75 MW. Result: plasma. H-mode. D: ran. max fault E: ran. 1 fault. J: ran. max fault. J3 matching? 149 kJ. 4 MW RF. |
| May 29 2003 10:44:29:627AM | 1030528030 | Yijun Lin | Plasma request: 1.2 MA, 5.4 T, nl04 = .9 x 10^20 m^-2, normal SN diverted. RF request: D: [0.8, 1.3] sec, 0.85 MW. E: [0.8, 1.3] sec, 1.2 MW. J: [0.8, 1.3] sec, 2 x 0.8 MW. Result: plasma. H-mode. D: ran. faulted out after 0.9 sec E: ran. 1 fault. J: ran. faulted after 0.9 sec. Possible ELM-free H-mode. D and J faulted out after H-L transition. 149 kJ. 4 MW RF. |
| Physics Operator Comments | |||
| May 28 2003 08:43:58:880AM | Earl Marmar | Engineering setup for Wednesday 1030528 MP#326 High Power RF SL: Wukitch PO: Marmar ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight. Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030514024 (0.8 MA, 5.4 T, lower single null), EXCEPT Leave the asymmetric control coils (C-coils) in the configuration of 1030522022: +Dtop -Dbot -Jtop +Jbot Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV ------------------------------------------------------------------------------- RF Setup: All 4 transmitters in Run On by 08:00. | |
| May 28 2003 09:46:54:010AM | 1030528001 | Earl Marmar | load from 1030514024; replace nl_zmeter with nl_04 increase Ip to 850 kA reduce prefill puff to 25 msec fizzle; numerous hybrid and cpci problems no EF3 |
| May 28 2003 10:23:57:903AM | 1030528002 | Earl Marmar | no power test hybrid signals look ok, although there appear to be some small noise spikes on 8 of the hybrid cpci channels |
| May 28 2003 10:44:21:630AM | 1030528003 | Earl Marmar | no pcs changes plasma |
| May 28 2003 10:44:34:020AM | 1030528004 | Earl Marmar | no pcs changes plasma |
| May 28 2003 11:04:53:700AM | 1030528005 | Earl Marmar | no pcs changes plasma |
| May 28 2003 11:18:45:090AM | 1030528006 | Earl Marmar | no pcs changes plasma |
| May 28 2003 12:15:36:580PM | 1030528007 | Earl Marmar | no pcs changes plasma Interferometer lost it at 1.95 seconds, then the gas puff turned full on until 3.0 seconds. This caused the gate valves to close |
| May 28 2003 12:06:02:700PM | 1030528008 | Earl Marmar | no pcs changes plasma |
| May 28 2003 12:12:51:897PM | 1030528009 | Earl Marmar | turned nl_04 gain to 0 at 1.8 seconds plasma |
| May 28 2003 12:32:27:653PM | 1030528010 | Earl Marmar | lower nl_04 target to 0.8e20 plasma got about 0.9e20 (pre-rf) |
| May 28 2003 12:40:53:177PM | 1030528011 | Earl Marmar | no pcs changes plasma |
| May 28 2003 01:16:40:400PM | 1030528012 | Earl Marmar | no pcs changes plasma |
| May 28 2003 01:16:53:713PM | 1030528013 | Earl Marmar | no pcs changes plasma |
| May 28 2003 01:25:21:390PM | 1030528014 | Earl Marmar | increase Ip prog 25 kA plasma |
| May 28 2003 01:56:56:527PM | 1030528015 | Earl Marmar | no pcs changes plasma |
| May 28 2003 01:57:12:183PM | 1030528016 | Earl Marmar | no pcs changes plasma |
| May 28 2003 02:11:31:620PM | 1030528017 | Earl Marmar | no pcs changes plasma |
| May 28 2003 02:27:17:710PM | 1030528018 | Earl Marmar | no pcs changes plasma disrupt at 1.16 s; J-ant TV shows fireworks at that time |
| May 28 2003 02:47:54:657PM | 1030528019 | Earl Marmar | reduce pre-puff by 3 msec plasma bounced early, some hards less heating for 4 MW ICRF; h fraction probably up after the disruption; h/d not available (camac errors) |
| May 28 2003 02:57:58:207PM | 1030528020 | Earl Marmar | add 3 msec to prepuff increase Ip demand to 1.05 MA plasma no hards H/(H+D) = 9% |
| May 28 2003 03:09:29:973PM | 1030528021 | Earl Marmar | no pcs changes plasma disrupt in ramp-down (~800 kA) H/(H+D) = 10% |
| May 28 2003 03:27:41:250PM | 1030528022 | Earl Marmar | tweak clearin during rampdown plasma |
| May 28 2003 03:34:24:900PM | 1030528023 | Earl Marmar | turn on a-coils: on at 0.5, off at 1.6 +dtop -dbot -jtop +jbot plasma sawteeth seem bigger after 1.4 seconds |
| May 28 2003 03:53:03:190PM | 1030528024 | Earl Marmar | no pcs changes plasma |
| May 28 2003 04:03:26:723PM | 1030528025 | Earl Marmar | no pcs changes plasma |
| May 28 2003 04:18:58:520PM | 1030528026 | Earl Marmar | reduce clearin 5 mm (reduce inner and outer gaps) plasma |
| May 28 2003 04:38:10:793PM | 1030528027 | Earl Marmar | decrease clearin another 2 mm plasma |
| May 28 2003 04:38:40:810PM | 1030528028 | Earl Marmar | increase Ip demand to 1.25 MA fizzle B_r may be creeping up |
| May 28 2003 04:54:13:150PM | 1030528029 | Earl Marmar | reduce B_r offset 0.5 mT (now 0.0000) plasma, 1.2 MA |
| May 28 2003 05:18:38:170PM | 1030528030 | Earl Marmar | no pcs changes plasma got to Wmhd = 150 kJ H/(H+D) = 9% |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:29:44:310AM | Plasma | Bad | EFC Problem |
| 2 | 10:12:22:917AM | Test | Ok | Cycle Test |
| 3 | 10:24:26:340AM | Plasma | Ok | |
| 4 | 10:38:43:090AM | Plasma | Ok | |
| 5 | 10:55:30:633AM | Plasma | Ok | |
| 6 | 11:13:06:770AM | Plasma | Ok | |
| 7 | 11:32:00:927AM | Plasma | Ok | |
| 8 | 11:47:20:770AM | Plasma | Ok | |
| 9 | 12:06:13:920PM | Plasma | Ok | |
| 10 | 12:20:13:183PM | Plasma | Ok | |
| 11 | 12:32:52:090PM | Plasma | Ok | |
| 12 | 12:48:29:637PM | Plasma | Ok | |
| 13 | 01:01:45:670PM | Plasma | Ok | |
| 14 | 01:14:43:980PM | Plasma | Ok | |
| 15 | 01:31:31:120PM | Plasma | Ok | |
| 16 | 01:45:02:540PM | Plasma | Ok | |
| 17 | 02:06:56:670PM | Plasma | Ok | |
| 18 | 02:19:58:890PM | Plasma | Ok | |
| 19 | 02:33:28:703PM | Plasma | Ok | |
| 20 | 02:48:33:857PM | Plasma | Ok | |
| 21 | 03:01:26:250PM | Plasma | Ok | |
| 22 | 03:14:25:670PM | Plasma | Ok | |
| 23 | 03:28:08:250PM | Plasma | Ok | |
| 24 | 03:41:07:703PM | Plasma | Ok | |
| 25 | 03:53:54:283PM | Plasma | Ok | |
| 26 | 04:06:50:813PM | Plasma | Ok | |
| 27 | 04:19:43:707PM | Plasma | Ok | |
| 28 | 04:32:41:423PM | Plasma | Ok | |
| 29 | 04:45:24:457PM | Plasma | Ok | |
| 30 | 04:58:20:113PM | Plasma | Ok | |