| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Gerry Tinios |
| Physics operator(s): | Steve Horne |
| Engineering operator(s): | Vinny Bertolino |
| Engineering Operator Run Comment |
| Higher currents |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Jul 23 1993 08:56:28:790AM | Gerry Tinios | Today's run features Horne as physics operator, Tinios as assistant operator,
Bertolino as engineering operator, Pierson on the state, Paranay on power, Bosco on PLC and Sorci on aux. systems. Aim: Learn how to use EFC for vertical control as per MP004. Commuutation resistors: OH1A: 0.0001 OH1B: 0.045 OH2U: 0.0083 OH2L: 0.0085 EF1U: 0.0806 EF1L: 0.08 EF2U: 0.0455 EF2L: 0.0459 SUPPLY START CLOSE OPEN CROW INVERT EF1L -1.1 -0.94 0.0 0.07 0.35 EF1U -1.1 -0.94 0.0 0.07 0.35 OH1 -1.1 -0.85 0.0 0.1 0.35 OH2L -1.1 -0.65 0.0 0.12 0.35 OH2U -1.1 -0.65 0.0 0.12 0.35 EF2L -0.4 0.35 EF2U -0.4 0.35 EF3 -0.05 0.35 EF4 -1.1 0.35 EFC -0.02 0.9 TF -1.5 0.5 | |
| Jul 23 1993 08:58:52:000AM | 930723001 | Gerry Tinios | Same settings as shot 26 from yesterday.
B-side-upper for fueling. Pressure: 1.2e-5 Flash but no plasma. |
| Jul 23 1993 09:22:15:910AM | 930723002 | Gerry Tinios | Bz was slightly too positive in shot 1. Reduce EF4 for this shot by 50 A.
Also change EF4 volt-preprog so it is 0 for 0.5 sec before commutation. Nothing. |
| Jul 23 1993 09:39:28:780AM | 930723003 | Gerry Tinios | Bz went too far negative. Add 30 A back to EF4.
Also set the curr-preprog to its t=0 value from t=-0.5 sec so as to enter the shot with a flat current trace. Raise pressure to 1.6e-5. Flash. |
| Jul 23 1993 09:57:57:910AM | 930723004 | Gerry Tinios | Reduce EF4 by 30 A again, but keep curr_preprog flat as we enter shot.
Fizzle again. |
| Jul 23 1993 10:07:49:440AM | 930723005 | Gerry Tinios | No clues as to why we are not breaking down ==> reduce pressure to 1.1e-5.
Plasma. 440kA, looks a lot like 930722026. |
| Jul 23 1993 10:22:40:020AM | 930723006 | Gerry Tinios | Same as previous shot, but chopper comes on at 30 msec.
Also Ar gas pulse was enabled. Fizzle. Chopper bank charged, but we got no current on EFC. |
| Jul 23 1993 10:49:22:580AM | 930723007 | Gerry Tinios | Turn off EFC-TMX. Reduce pressure to 9.e-6.
This is an attempt to get the plasma back. Plasma. Saw sparks, but there do not seem to be any hard X-rays. 460kA, round plasma. Video does not show sparks. |
| Jul 23 1993 11:04:32:110AM | 930723008 | Gerry Tinios | Raise pressure to 1.e-5.
Ar gas pulse increased by 2 msec Turn chopper back on at 300 V static volt. We still don't know why it failed two shots ago. Got plasma and current on EFC. Plasma died earlier . |
| Jul 23 1993 11:17:00:830AM | 930723009 | Gerry Tinios | Ar gas pulse shortened by 4 msec. The consensus is that
we were limited by radiation from Moly and Argon in the previous shot. 500 V static voltage. Nothing. |
| Jul 23 1993 11:22:34:610AM | 930723010 | Gerry Tinios | Pressure increased to 1.4e-5.
Chopper is hooked to wire 3, the second Z_cur predictor. Fizzle. |
| Jul 23 1993 11:35:57:130AM | 930723011 | Gerry Tinios | Argon pulse disabled.
Gas pressure reduced to 1.2 e-5. EFC gain raised at 100 msec. Fizzle. |
| Jul 23 1993 11:47:06:400AM | 930723012 | Gerry Tinios | Reduce pressure to 1.0e-5.
Got plasma. |
| Jul 23 1993 12:00:52:310PM | 930723013 | Gerry Tinios | All power supply invert-times that were 0.35 were changed to 0.45
in an attempt to prolong the life of the plasma. Argon pulse enabled. Pulse starts at -50 msec and lasts 10 msec. Nice long plasma. |
| Jul 23 1993 12:41:20:980PM | 930723013 | Gerry Tinios | CORRECTION: Argon pulse starts at +50 msec.
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| Jul 23 1993 12:11:51:840PM | 930723014 | Gerry Tinios | Wire 3 (EFC) controller gain was rased at 100 msec.
Fizzle. Late breakdown. |
| Jul 23 1993 12:23:35:270PM | 930723015 | Gerry Tinios | EF1U and EF1L curr-preprog was extended so as
to prolong the plasma. Long plasma, dies at 400 msec. |
| Jul 23 1993 12:40:36:890PM | 930723016 | Gerry Tinios | Change OH2 voltage programming to hold OH2 current up longer.
Doubled the controller gain on wire 3. Argon puff at 50 msec was shortened. Long plasma, dies after 420 msec. |
| Jul 23 1993 12:59:43:190PM | 930723017 | Gerry Tinios | OH1 voltage programming was changed, so OH1 current stays on longer.
Increase EFC voltage to 650 V. Plasma. Z-oscillation. Dies going up after 400 msec. |
| Jul 23 1993 01:17:25:700PM | 930723018 | Gerry Tinios | Move all invert times to 0.5 sec.
Change TF invert time to 0.55sec. Add derivative gain (one unit) to wire 3 at 0.2 sec. Fizzle. |
| Jul 23 1993 01:33:31:970PM | 930723019 | Gerry Tinios | Exact repeat of previous shot.
Plasma. Dies of vertical instability. |
| Jul 23 1993 01:41:46:510PM | 930723020 | Gerry Tinios | Turn up derivative gain on wire 3 to two units.
Hoping to control the vertical ionstability. Fizzle. Late breakdown. |
| Jul 23 1993 01:59:00:910PM | 930723021 | Gerry Tinios | Repeat previous shot.
Ar puff was extended by 2 msec. Plasma. Still shaking up and down by 1cm. Density is dropping. |
| Jul 23 1993 02:07:19:840PM | 930723022 | Gerry Tinios | Repeat previous shot.
Much like the last shot. |
| Jul 23 1993 02:20:12:820PM | 930723023 | Gerry Tinios | Double derivative gain on wire 3 (4 units).
Double proportional gain on wire 2 (the slow zcur feedback wire) from 0.4 to 0.8. Fizzle. |
| Jul 23 1993 02:30:45:450PM | 930723024 | Gerry Tinios | Repeat.
Plasma. Oscillations started earlier, at about the time we applied the wire 2 gain (150 msec). |
| Jul 23 1993 02:41:14:370PM | 930723025 | Gerry Tinios | Reduced proportional gain on wire 2 to 0.3
No flash. |
| Jul 23 1993 02:51:02:400PM | 930723026 | Gerry Tinios | Reduced pressure to 8.0e-6.
No flash. |
| Jul 23 1993 03:07:05:860PM | 930723027 | Gerry Tinios | Increase pressure to 1.2e-5.
No flash. |
| Jul 23 1993 03:26:47:930PM | 930723028 | Gerry Tinios | Repeat of previous shot.
Fizzle. |
| Jul 23 1993 03:37:34:970PM | 930723029 | Gerry Tinios | Reduce pressure to 1.0e-5.
Got plasma. The oscillation in Z seems to be gone. |
| Jul 23 1993 03:48:37:600PM | 930723030 | Gerry Tinios | Smoothed out the jump in gas-puff-2 at 0.3 sec. It seemed to
be causing some unpleasant things. Fizzle. |
| Jul 23 1993 03:59:53:980PM | 930723031 | Gerry Tinios | Increased EF4 current-programming by 20 A. It was observed that
Bz has been slowly decreasing during the day by 2mT. Fizzle. |
| Jul 23 1993 04:13:45:570PM | 930723032 | Gerry Tinios | Repeat of previous shot.
Arcs, sparks and runaways. But it was a record shot in two ways. Peak current: 0.5 MA Duration: 520 msec |
| Jul 23 1993 04:26:08:670PM | 930723033 | Gerry Tinios | Reduce EF4 current by 10 A.
Increase fill pressure to 1.2e-5. Plasma. Almost a runaway shot. High current and duration. |
| Jul 23 1993 04:37:19:930PM | 930723034 | Gerry Tinios | Increase EF2L current programming by 150 A later in the shot.
This is an attempt to cancel the bias field of the chopper and pull the plasma down. Plasma with lots of hard X-rays. |
| Jul 23 1993 04:47:32:800PM | 930723035 | Gerry Tinios | Reduce EF4-current programming by 10 A.
Plasma with hard X-rays again. |
| Jul 23 1993 04:59:09:150PM | 930723036 | Gerry Tinios | Adjusted gas puffing so as to get a little more gas at the beginning.
A zcur predictor was put on wire 4 and hooked to the EFC with the controller at maximum gain and a P-gain of 5 being turned on at 180 msec. Plasma. No hard x_rays. Z-centroid slowly drifts down during shot. |
| Jul 23 1993 05:11:21:860PM | 930723037 | Gerry Tinios | Increased EF2L late current-programming by another 100 A to 1000A.
Plasma. No hard x_rays. Z-position drifted down later in the shot, but still remained above the midplane. |
| Physics Operator Comments |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:55:13:470AM | Plasma | Ok | no faults |
| 2 | 09:16:48:500AM | Plasma | Ok | no faults |
| 3 | 09:29:31:000AM | Plasma | Ok | no faults |
| 4 | 09:43:06:890AM | Plasma | Ok | no faults |
| 5 | 10:00:01:800AM | Plasma | Ok | no faults |
| 6 | 10:13:05:740AM | Plasma | Ok | no chopper all others no faults |
| 7 | 10:27:36:640AM | Plasma | Ok | no faults |
| 8 | 10:56:58:700AM | Plasma | Ok | no faults chopper ok |
| 9 | 11:08:09:080AM | Plasma | Ok | no faults |
| 10 | 11:19:36:150AM | Plasma | Ok | no faults |
| 11 | 11:30:53:600AM | Plasma | Ok | no faults |
| 12 | 11:41:58:820AM | Plasma | Ok | no faults |
| 13 | 11:53:00:420AM | Plasma | Ok | no faults |
| 14 | 12:04:33:040PM | Plasma | Ok | no faults |
| 15 | 12:15:21:270PM | Plasma | Ok | no faults |
| 16 | 12:34:49:110PM | Plasma | Ok | no faults |
| 17 | 12:49:25:160PM | Plasma | Ok | plasma ok |
| 18 | 01:10:36:690PM | Plasma | Ok | no faults |
| 19 | 01:20:50:920PM | Plasma | Ok | no faults |
| 20 | 01:35:11:980PM | Plasma | Ok | no faults |
| 21 | 01:45:05:020PM | Plasma | Ok | no faults |
| 22 | 02:01:15:440PM | Plasma | Ok | no faults |
| 23 | 02:13:36:560PM | Plasma | Ok | no faults |
| 24 | 02:23:44:400PM | Plasma | Ok | no faults |
| 25 | 02:34:51:570PM | Plasma | Ok | no faults |
| 26 | 02:45:55:470PM | Plasma | Ok | no faults |
| 27 | 02:58:11:960PM | Plasma | Ok | no faults |
| 28 | 03:09:05:650PM | Plasma | Ok | no faults |
| 29 | 03:29:13:780PM | Plasma | Ok | no faults |
| 30 | 03:41:11:850PM | Plasma | Ok | no faults |
| 31 | 03:53:06:610PM | Plasma | Ok | no faults |
| 32 | 04:03:26:070PM | Plasma | Ok | no faults |
| 33 | 04:18:12:150PM | Plasma | Ok | no faults |
| 34 | 04:30:40:300PM | Plasma | Ok | no faults |
| 35 | 04:41:06:870PM | Plasma | Ok | no faults |
| 36 | 04:52:17:760PM | Plasma | Ok | no faults |
| 37 | 05:02:56:170PM | Plasma | Ok | no faults |