| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Ron Parker,Joseph Snipes,Ron Parker |
| Engineering operator(s): | Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| MP355 RF Conditioning |
| Session Leader Plans |
| Entered: Mar 22 2006 04:32:55:320PM |
| Author: Steve Wukitch |
| Engineering setup for Thursday 23-Mar-2006
MP355 RF Conditioning Session leader: Wukitch Physics operator: Parker Overnight ECDC in D2, and bake at 60 C. Run begins at 09:00 and ends at 17:00 Power systems as on 1060321011 (1.0 MA fiducial, 5.4 T, LSN) 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 Ne Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 12 psi D2 Enabled Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo shutters Torvac setup: Gate valves open Important Diagnostics: magnetics, standard impurity spectroscopy ------------------------------------------------------------------------------- ICRF Setup: FMIT#1 in run-on by 7:30. FMIT#2-4 in run-on by 08:30. ------------------------------------------------------------------------------- Plan: Continue machine cleanup and ICRF conditioning (including Jport) in fiducial discharges. Once reasonable power is reached on J antenna, begin exploration of pulse length and power limits |
| Physics Operators Plans |
| Entered: Mar 22 2006 04:43:56:943PM |
| Author: Ron Parker |
| Engineering setup for Thursday 23-Mar-2006
MP355 RF Conditioning Session leader: Wukitch Physics operator: Parker Overnight ECDC in D2, and bake at 60 C. Run begins at 09:00 and ends at 17:00 Power systems as on 1060321011 (1.0 MA fiducial, 5.4 T, LSN) 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 Ne Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 12 psi D2 Enabled Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo shutters Torvac setup: Gate valves open Important Diagnostics: magnetics, standard impurity spectroscopy ------------------------------------------------------------------------------- ICRF Setup: FMIT#1 in run-on by 7:30. FMIT#2-4 in run-on by 08:30. ------------------------------------------------------------------------------- Plan: Continue machine cleanup and ICRF conditioning (including Jport) in fiducial discharges. Once reasonable power is reached on J antenna, begin exploration of pulse length and power limits |
| Session Leader Summaries |
| Entered: Mar 23 2006 05:11:43:550PM |
| Author: Steve Wukitch |
| Run Summary:
D antenna conditioned quickly to 1.2 MW and eventually conditioned to 1.4 MW. J antenna continued to struggle and much of its inconsistency was due to failed retries (antenna would fault immediately upon retry). The J antenna fault level for the reflected to forward power ratio appears low (~16%) instead of the nominal 25%. We will need to check attenuation to verify and correct and we can do this effectively with vacuum conditioning. |
| Physics Operator Summaries |
| Entered: Mar 23 2006 05:20:17:877PM |
| Author: Ron Parker |
| The run was devoted to ICRF conditioning and the same discharge was programmed for all shots: I = 1 MA, B = 5.4 T and n_eL(4) ~0.8e20 m-2. The machine ran fairly well, although there were three duds early in the run and 3 Fizzles later on. It seems that fizzles are best avoided by early breakdown (~ 5 ms) with a smooth burnout of Halpha. This requires constant monitoring and adjustment of the stray fields and pressure, but may also depend on the cleanliness of the machine that results from earlier shots. There were 15 straight shots without a dud or fizzle (shots 7-22), interrupted only by one shot in which the TF did not energize (this apparently happens from time to time and the cause is not known.) But toward the end of the run the startup seemed to become less reliable.
Scorecard: 33 attempts plus one no power shot, 25 full term plasmas, 3 duds, 3 fizzles and one early (60 ms) current quenching disruption (shot 34). |
| Session Leader Comments | |||
| Mar 23 2006 09:54:13:243AM | 1060323001 | Steve Wukitch | dud |
| Mar 23 2006 09:54:28:027AM | 1060323002 | Steve Wukitch | 002 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3->0.8 MW [1.0,1.5]sec J: 0.8->2 MW [0.6,1.5]sec result: plasma D: ran max faults - need better match J: ran max faults |
| Mar 23 2006 09:54:07:057AM | 1060323003 | Steve Wukitch | dud |
| Mar 23 2006 09:53:54:683AM | 1060323004 | Steve Wukitch | 004 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3->0.8 MW [1.0,1.5]sec J: 0.8->2 MW [0.6,1.5]sec result: plasma D: ran 1 fault J: ran max faults next: repeat |
| Mar 23 2006 10:08:44:447AM | 1060323005 | Steve Wukitch | dud |
| Mar 23 2006 10:23:19:590AM | 1060323006 | Steve Wukitch | dud |
| Mar 23 2006 10:42:42:017AM | 1060323007 | Steve Wukitch | 007 BT~5.4T, Ip=1 MA, nl04=0.8
D: 1 MW [1.0,1.5]sec J: 0.8->2 MW [0.6,1.5]sec result: plasma D: ran 5 faults J: ran max faults next: repeat |
| Mar 23 2006 11:04:57:737AM | 1060323008 | Steve Wukitch | 008 BT~5.4T, Ip=1 MA, nl04=0.8
D: 1 MW [1.0,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran max faults troubles with transitions next: repeat |
| Mar 23 2006 11:17:18:207AM | 1060323009 | Steve Wukitch | 009 BT~5.4T, Ip=1 MA, nl04=0.8
D: 1.2 MW [1.0,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran 9 faults J: ran max faults still has troubles with transitions next: repeat |
| Mar 23 2006 11:27:30:783AM | 1060323010 | Steve Wukitch | 010 BT~5.4T, Ip=1 MA, nl04=0.8
D: 1.2 MW [1.0,1.5]sec J: 0.8->2 MW [0.55,1.5]sec result: plasma D: ran 5 faults J: max faults next: repeat - adjust RF waveforms |
| Mar 23 2006 11:43:14:033AM | 1060323011 | Steve Wukitch | 011 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.2 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran 7 faults J: ran first off is programmed and max faults on retries next: repeat - adjust RF waveforms |
| Mar 23 2006 12:26:56:597PM | 1060323012 | Steve Wukitch | 012 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.2 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran 8 faults J: ran again first off is programmed and max faults on retries next: repeat - adjust RF waveforms |
| Mar 23 2006 12:27:19:173PM | 1060323013 | Steve Wukitch | 013 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.2 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran with some improvement next: repeat - adjust RF waveforms |
| Mar 23 2006 12:27:32:347PM | 1060323014 | Steve Wukitch | 014 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.2 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran max faults - more faults on the ramp next: repeat |
| Mar 23 2006 12:34:16:753PM | 1060323015 | Steve Wukitch | no TF |
| Mar 23 2006 01:05:01:800PM | 1060323016 | Steve Wukitch | 016 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.2 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran max faults J: ran max faults - better more like 13 next: repeat |
| Mar 23 2006 01:08:37:097PM | 1060323017 | Steve Wukitch | 017 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran max faults J: ran faults - better next: repeat |
| Mar 23 2006 01:20:57:440PM | 1060323018 | Steve Wukitch | 018 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran 4 faults J: ran faults - worse than previous shot next: repeat |
| Mar 23 2006 01:50:35:317PM | 1060323019 | Steve Wukitch | 019 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran max faults J: ran faults - better than previous shot next: repeat |
| Mar 23 2006 01:49:51:550PM | 1060323020 | Steve Wukitch | 020 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran 6 faults J: ran faults - little worse than shot next: repeat |
| Mar 23 2006 01:57:58:987PM | 1060323021 | Steve Wukitch | 021 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran 6 faults J: ran faults - little worse than previous shot next: repeat |
| Mar 23 2006 04:09:22:707PM | 1060323022 | Steve Wukitch | fizzle |
| Mar 23 2006 04:09:37:550PM | 1060323024 | Steve Wukitch | 024 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran multiple faults J: ran max faults but ran 0.2 msec at 2 MW |
| Mar 23 2006 04:08:35:643PM | 1060323025 | Steve Wukitch | 025 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran multiple faults J: ran multiple faults |
| Mar 23 2006 04:08:24:783PM | 1060323026 | Steve Wukitch | 026 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 ramp to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran multiple faults |
| Mar 23 2006 04:03:07:097PM | 1060323027 | Steve Wukitch | fizzle |
| Mar 23 2006 04:02:47:423PM | 1060323028 | Steve Wukitch | 028 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran max faults J: ran max faults - all J3DC1 faults next: break to insert 1 dB on J DC1 reflected |
| Mar 23 2006 04:02:35:783PM | 1060323029 | Steve Wukitch | 029 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran max faults J: ran max faults - all J4DC0 faults |
| Mar 23 2006 04:18:33:033PM | 1060323030 | Steve Wukitch | 030 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran max faults - all J4DC0 faults |
| Mar 23 2006 04:27:41:190PM | 1060323031 | Steve Wukitch | 031 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran max faults - all J4DC0 faults |
| Mar 23 2006 04:56:57:627PM | 1060323032 | Steve Wukitch | 032 BT~5.4T, Ip=1 MA, nl04=0.8
D: 0.3 step to 1.4 MW [0.65,1.5]sec J: 0.4->2 MW [0.55,1.5]sec result: plasma D: ran J: ran not quite dead yet |
| Mar 23 2006 04:56:05:800PM | 1060323033 | Steve Wukitch | fizzle |
| Mar 23 2006 05:11:24:173PM | 1060323034 | Steve Wukitch | 034 killer injection |
| Physics Operator Comments | |||
| Mar 23 2006 09:21:16:777AM | 1060323002 | Ron Parker | Shot 001 was a no power shot, to check scanner operation.
Shot 2 was the first plasma shot and ran well, with rampdown to 50 kA before disruption. |
| Mar 23 2006 09:34:36:353AM | 1060323003 | Ron Parker | A classic dud! No Halpha. Gas was 10% higher than on first shot-- .082 mT vs. .074 mT, both of which seem a bit high. Lower pulsed gas by 5 ms for next shot.
Meanwhile, power room access for RF problem. |
| Mar 23 2006 09:49:50:573AM | 1060323004 | Ron Parker | Shot came back, fill pressure .065 mT. Early breakdown ~4.5 ms. Bz very slightly
more positive than in 1060321011 shot that was loaded to begin the run. |
| Mar 23 2006 10:02:24:353AM | 1060323005 | Ron Parker | Another classic dud. Absolutely unexplainable in terms of fill pressure 5% higher than last shot), or error fields at t= 5ms. No point to change anything. |
| Mar 23 2006 10:37:20:970AM | 1060323006 | Ron Parker | Another dud -- this is a real case study for breakdown. Stray fields are perfect, pressure is the only variable. We'll increase it by 3 ms on the pulsed gas valve for next shot.
Lower EF4 current by 5 Amps, from -1335 to -1340. Cooling problems, F-right vertical stuck at -157. ~ 10 minute delay. |
| Mar 23 2006 10:48:11:567AM | 1060323007 | Ron Parker | Shot came back. Continue with shot.
Argon/Neon will be injected on next shot. |
| Mar 23 2006 10:56:50:503AM | 1060323008 | Ron Parker | Shot ran again, not clear what change was responsible, if any.
No changes for next shot. F-right vertical leg still high (-157) but not ratcheting, so we'll continue to run at -157. Joe Snipes will fill in for me unitl ~ 12:00. |
| Mar 23 2006 11:23:47:830AM | 1060323009 | Joseph Snipes | Shot 9: Joe Snipes taking over for Ron Parker as Physop while he is away for an hour or so. Repeat. Good shot. |
| Mar 23 2006 11:23:55:363AM | 1060323010 | Joseph Snipes | Shot 10: Li pellet injection just after 1.5 s. Otherwise no changes. Good shot. |
| Mar 23 2006 11:36:09:877AM | 1060323011 | Joseph Snipes | Shot 11: Brock claims that the injection at 1.6s on shot 10 was not his pellet. He will try again for this shot. Good shot. |
| Mar 23 2006 11:49:28:127AM | 1060323012 | Joseph Snipes | Shot 12: Repeat. LPI no longer attempting to fire pellets. Good shot. |
| Mar 23 2006 12:17:58:143PM | 1060323013 | Joseph Snipes | Shot 13: Repeat. Good shot. |
| Mar 23 2006 12:18:08:770PM | 1060323014 | Joseph Snipes | Shot 14: Repeat. Good shot. |
| Mar 23 2006 12:33:09:410PM | 1060323015 | Ron Parker | Shot 15 was a no-TF shot, reasons unknown.
Next shot should be back. |
| Mar 23 2006 12:56:09:923PM | 1060323016 | Ron Parker | Shot 16 ran well. Short delay in running the shot due to an apparent EF4 cooling problem that turned out to be instrumental. |
| Mar 23 2006 01:06:44:893PM | 1060323017 | Ron Parker | Shot 17 looked good. No changes, keep firing. |
| Mar 23 2006 01:21:22:143PM | 1060323018 | Ron Parker | Shot 18 ran well, no changes. |
| Mar 23 2006 01:44:27:033PM | 1060323019 | Ron Parker | Shot 19 ran well. Still no changes. |
| Mar 23 2006 01:57:16:050PM | 1060323020 | Ron Parker | Shot 20 ran well, machine has been in a groove.
Bz0 was alittle more positive on that shot than in shot 19, eg. 0.0 mT @ 5 ms vs -.7 mT @ 5ms on shot 20. Breakdown moved to ~ 6.4 ms vs 5.3 ms on shot 19. We'll see if this is a trend on the next shot. BR was also a little more positive, 0.0 mT @ 5 ms compared to -.3 mT. |
| Mar 23 2006 02:00:39:767PM | 1060323021 | Ron Parker | Shot 21 ran well and continues the good streak. Breakdown OK, No changes. |
| Mar 23 2006 02:44:01:830PM | 1060323022 | Ron Parker | Shot 22 ran well, a few bumps showing up on Halpha burnout. |
| Mar 23 2006 02:42:51:503PM | 1060323023 | Ron Parker | The string of good shots ended with shot 23 as it fizzled.
The stray fields look fine, the pressure might be a tad high ~ .077 mTorr. We'll take 2 ms off the pulsed gas. |
| Mar 23 2006 02:42:22:720PM | 1060323024 | Ron Parker | The shot came back. Bz is arguably a bit too high, ~0.7 mT @ 5 ms. No change, we'll watch it to see if this is a trend. |
| Mar 23 2006 03:11:20:783PM | 1060323025 | Ron Parker | Shot 25 ran full term. |
| Mar 23 2006 03:10:56:830PM | 1060323026 | Ron Parker | Shot 26 ran well, breakdown is a little late, 7ms. |
| Mar 23 2006 03:19:17:753PM | 1060323027 | Ron Parker | Fizzle! For next shot, reduce Bz by 5 Amps on EF4, decrease BR by .1 mT. |
| Mar 23 2006 03:46:39:847PM | 1060323028 | Ron Parker | Shot came back with 5 ms breakdown. Short delay due to cell access. |
| Mar 23 2006 04:00:42:393PM | 1060323029 | Ron Parker | Shot 29 went off and ran well. Breakdown just under 5 ms.
|
| Mar 23 2006 04:18:06:190PM | 1060323030 | Ron Parker | Shot 30 ran well, breakdown at 6 m, bump in Halpha at .01 s.
No changes for next shot. |
| Mar 23 2006 04:30:44:970PM | 1060323031 | Ron Parker | Shot 31 went off and ran well. Breakdown just over 5 ms. Small bump on Halpha early during rampup. No change for next shot, just 1 ms less pulsed gas. |
| Mar 23 2006 04:46:15:767PM | 1060323032 | Ron Parker | Shot 32 went off and ran well. Breakdown moving out a bit to 6.5 ms. |
| Mar 23 2006 05:00:50:160PM | 1060323033 | Ron Parker | Shot 33 fizzled, not clear why except one could see it coming with the delayed startup and bump on halpha during the early ramp. |
| Mar 23 2006 05:08:04:423PM | 1060323034 | Ron Parker | A wierd one! Shot started up well, breakdown just over 5 ms., but suffered early injections that led to a disruption early in current rampup, first at around 75 kA, the second at ~110 kA which killed the discharge. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:29:900AM | Test | Ok | Scanner Test |
| 2 | 09:14:01:807AM | Plasma | Ok | |
| 3 | 09:28:34:400AM | Plasma | Ok | |
| 4 | 09:42:11:103AM | Plasma | Ok | |
| 5 | 09:57:31:823AM | Plasma | Ok | |
| 6 | 10:11:50:527AM | Plasma | Ok | |
| 7 | 10:37:25:957AM | Plasma | Ok | |
| 8 | 10:51:28:690AM | Plasma | Ok | |
| 9 | 11:04:48:347AM | Plasma | Ok | |
| 10 | 11:18:14:220AM | Plasma | Ok | |
| 11 | 11:34:40:470AM | Plasma | Ok | |
| 12 | 11:47:40:533AM | Plasma | Ok | |
| 13 | 12:02:30:520PM | Plasma | Ok | |
| 14 | 12:16:18:190PM | Plasma | Ok | |
| 15 | 12:29:47:127PM | Plasma | Bad | TF did not fire, No faults indicated |
| 16 | 12:48:44:423PM | Plasma | Ok | |
| 17 | 01:02:51:097PM | Plasma | Ok | |
| 18 | 01:16:08:457PM | Plasma | Ok | |
| 19 | 01:28:56:830PM | Plasma | Ok | |
| 20 | 01:41:36:550PM | Plasma | Ok | |
| 21 | 01:54:18:017PM | Plasma | Ok | |
| 22 | 02:06:56:253PM | Plasma | Ok | |
| 23 | 02:19:41:113PM | Plasma | Ok | |
| 24 | 02:32:53:970PM | Plasma | Ok | |
| 25 | 02:45:59:830PM | Plasma | Ok | |
| 26 | 02:58:49:283PM | Plasma | Ok | |
| 27 | 03:11:35:237PM | Plasma | Ok | |
| 28 | 03:24:29:503PM | Plasma | Ok | |
| 29 | 03:55:39:270PM | Plasma | Ok | |
| 30 | 04:09:02:423PM | Plasma | Ok | |
| 31 | 04:21:37:783PM | Plasma | Ok | |
| 32 | 04:34:38:113PM | Plasma | Ok | |
| 33 | 04:48:26:410PM | Plasma | Ok | |
| 34 | 05:01:02:330PM | Plasma | Ok | |