| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| Start Up/RF/Granetz/Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:04:397PM |
| Author: To Be Determined |
| Physics operator summary for run 990721 ________________________________________________________ Run Plan for 990721: MP 214 -- RF conditioning SL: S. Wukitch PO: D. Mossessian Start by loading 990716010 , an 0.8 MA, long flattop shot . Optimise vertical position for RF balance. _______________________________________________________ Summary: The run was characterized by an unusual amount of duds (cause unknown) and complete lack of fizzles. Although several plasmas were obtained, only one did not disrupt, and another one disrupted late in the shot. Most of the plasmas disrupted early in the shot mainly due to large impurirty injections (numerous small injections are seen on many shots too) One shot (13) developed vertical instability because of the OH2 mulfunction. Some problems with data cycle developed late in the day and interfered with normal shot cycle. The general impression is that the machine is dirty and overnight ECDC should help. Numerous tweeks of Br, Bz and prepuff pressures carryed out during the day seem to be irrelevant. Shots from 06 have the right gap at 1 cm (as requested by RF). Shot 990721009 (no disruption) could be a good shot to start the next day from. ___________________________________________________________________ Scorecard: 20 shots 8 plasmas 0 fizzles 10 duds 2 tests ---------------------------------------------------------------------------- 990721001 OH test. 990721002 Dud 990721003 Decreased prepuff from 23 msec to 20 msec. Decreased Br offset from 7 to 6 mT. Dud. 990721004 Decreased Br offset to 5 mT for this shot. Dud. 990721005 Br ofset - back to 6 mT. Plasma. Flattop 1e20 m^-2 , .8 MA. Disrupted at .92 sec. 990721006 Changed the right gap to 1 cm - increased Rcur to 0.6715 from .6685 Dud. 990721007 Plasma. Disrupted at 0.76 sec. 990721008 Dud. 990721009 Plasma. Touched inner wall around .356 sec producing large injection. Small H-mode @ 0.95 sec. 990721010 Plasma. Disrupted at 1.25 sec. No H-mode this time. 990721011 Plasma. Disrupted at 0.4 sec probably due to large injection. 990721012 Plasma but disrupted very early - around 0.057 sec. 990721013 Plasma Disrupted around 0.245 sec due to OH2 problems leading to vertical instability. 990721014 Dud. 990721015 Dud. 990721016 +0.5 mT change in Br offset. Plasma. Disrupted at 0.5 sec - large impurity injection. 990721017 Dud. Increased gas puff in pulse_gas3. 990721018 Dud. 990721019 a) Br offset from 6.5 to 6 mT b) Moved Bz 1 mT down (15 A on EF4) Dud |
| Session Leader Comments | |||
| Jul 21 1999 09:32:17:390AM | Steve Wukitch | MP 214: RF conditioning Transmitters 1 and 2 (D and E antenna) are ready to be tested into plasma. We will be shooting #2 (E antenna) first with a few shots for tuning and optimizing plasma. As soon as #2 is reliable, we will bring #1 (D) next using the same approach. Optimizing and tuning both antennas will take a few more shots. If time allows, we will bring 3 and 4 (J) along at low power, as we expect issues with tuning and running them together. We will start with the most recent shot, i.e. 990716010, with possibly a small decrease in outer gap. | |
| Jul 21 1999 09:31:33:983AM | 990721001 | Steve Wukitch | OH test shot |
| Jul 21 1999 11:11:36:047AM | 990721005 | Steve Wukitch | E antenna went for ~600kW. Will adjust tuning a little bit. |
| Jul 21 1999 11:54:02:467AM | 990721007 | Steve Wukitch | E antenna went for ~450kW, before disruption. |
| Jul 21 1999 12:55:13:000PM | 990721009 | Steve Wukitch | E antenna went for ~1MW, went into H mode! |
| Jul 21 1999 01:02:36:530PM | 990721010 | Steve Wukitch | E antenna went for ~1.2MW |
| Physics Operator Comments | |||
| Jul 21 1999 09:04:04:420AM | Dmitri Mossessian | Load PCS from 990716010. Coldstart OK. We are going to do EF2 and OH test first. | |
| Jul 21 1999 09:44:50:763AM | 990721001 | Dmitri Mossessian | Skipped EF2 test. Doing OH test. |
| Jul 21 1999 10:18:56:293AM | 990721002 | Dmitri Mossessian | Real shot. Dud For the next shot decreased prepuff from 23 msec to 20 msec. Dropped Br offset from 7 to 6 mT. |
| Jul 21 1999 10:30:28:093AM | 990721003 | Dmitri Mossessian | Dud. |
| Jul 21 1999 10:37:40:013AM | 990721003 | Dmitri Mossessian | Dud. Increase prepuff to 25 msec. |
| Jul 21 1999 10:51:46:983AM | 990721004 | Dmitri Mossessian | Also decreased Br offset to 5 mT for this shot. Dud again. Add 1mT to Br ofset - back to 6 mT for next shot |
| Jul 21 1999 11:19:01:327AM | 990721005 | Dmitri Mossessian | Plasma. Flattop 1e20 m^-2 , .8 MA. Disrupted at .92 sec. |
| Jul 21 1999 11:22:00:513AM | 990721006 | Dmitri Mossessian | Changed the right gap to 1 cm - increased Rcur to 0.6715 from .6685 |
| Jul 21 1999 11:47:56:310AM | 990721006 | Dmitri Mossessian | Dud. No PCS changes for next shot |
| Jul 21 1999 12:08:03:153PM | 990721007 | Dmitri Mossessian | Plasma. Disrupted at 0.76 sec. No PCS changes for next shot. |
| Jul 21 1999 12:19:11:543PM | 990721008 | Dmitri Mossessian | Dud. Try again with no PCS changes |
| Jul 21 1999 12:51:18:747PM | 990721009 | Dmitri Mossessian | Plasma. Touches inner wall around .356 sec producing large injection. Small H-mode @ 0.95 sec. NO PCS changes for next shot |
| Jul 21 1999 01:07:45:373PM | 990721010 | Dmitri Mossessian | Plasma. Disrupted at 1.25 sec. No H-mode this time. |
| Jul 21 1999 01:19:58:543PM | 990721011 | Dmitri Mossessian | Plasma. Disrupted at 0.4 sec probably due to large injection. |
| Jul 21 1999 01:48:16:700PM | 990721012 | Dmitri Mossessian | Plasma but disrupted very early - around 0.057 sec. |
| Jul 21 1999 02:19:35:047PM | 990721013 | Dmitri Mossessian | Plasma Disrupted around 0.245 sec. Possible cause - OH2 problems leading to vertical instability. |
| Jul 21 1999 02:27:03:763PM | 990721014 | Dmitri Mossessian | Dud. |
| Jul 21 1999 02:52:20:903PM | 990721015 | Dmitri Mossessian | Dud. Try positive Br shift - +0.5 mT change in offset |
| Jul 21 1999 03:17:53:247PM | 990721016 | Dmitri Mossessian | Plasma. Disrupted at 0.5 sec - large impurity injection. |
| Jul 21 1999 03:40:46:670PM | 990721017 | Dmitri Mossessian | Dud. Increased gas puff in pulse_gas3 in response to Earl's claim that density is too low at the beginning of the shot. |
| Jul 21 1999 04:18:46:700PM | 990721018 | Dmitri Mossessian | Dud. For the next shot: a) Br offset from 6.5 to 6 mT b) Moved Bz 1 mT down (15 A on EF4) |
| Jul 21 1999 05:13:09:687PM | 990721019 | Dmitri Mossessian | Not a real shot - data cycle only |
| Jul 21 1999 05:13:27:857PM | 990721020 | Dmitri Mossessian | Plasma attempt - Dud. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:25:28:903AM | Test | Ok | OH plc test |
| 2 | 09:53:00:093AM | Plasma | Ok | no faults/dud |
| 3 | 10:20:45:937AM | Plasma | Ok | no faults |
| 4 | 10:46:51:543AM | Plasma | Ok | no faults |
| 5 | 11:06:11:653AM | Plasma | Ok | no faults |
| 6 | 11:27:08:013AM | Plasma | Ok | no faults |
| 7 | 11:49:24:623AM | Plasma | Ok | no faults |
| 8 | 12:12:41:310PM | Plasma | Ok | no faults |
| 9 | 12:34:58:420PM | Plasma | Ok | no faults/plasma |
| 10 | 12:53:08:263PM | Plasma | Ok | no faults/plasma |
| 11 | 01:11:51:297PM | Plasma | Bad | OH1 overvolts flt,ef4 overvolts flt |
| 12 | 01:30:00:090PM | Plasma | Ok | no faults |
| 13 | 01:47:57:687PM | Plasma | Ok | No faults |
| 14 | 02:19:30:750PM | Plasma | Ok | no faults |
| 15 | 02:43:12:750PM | Plasma | Ok | No faults |
| 16 | 03:09:52:153PM | Plasma | Ok | no faults |
| 17 | 03:33:46:543PM | Plasma | Ok | no faults |
| 18 | 04:06:57:640PM | Plasma | Ok | no faults |
| 19 | 04:51:55:983PM | Test | Ok | No Power Test |
| 20 | 05:06:43:840PM | Plasma | Ok | No Plasma, Supplies okay |