| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Gerd Schilling,Steve Wukitch |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| RF Conditioning/Mossessian, Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:09:240PM |
| Author: To Be Determined |
| Physics operator summary for run 990909: Run Plan and Engineering Setup: SL: Wukitch/Schilling PO: Mossessian This run was a continuation of that scheduled for September 8, 1999. The general purpose was to condition the RF antennas. The run was scheduled to start at 10:00 and end at 17:00 _________________________ Engineering setup: Two hours ECDC in D2 prior to run, finishing at least 1 hour before run. Setup power supplies from 990908004 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 6 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled J-bottom pumped out Hybrid DISABLED _______________________________________ Summary: The run was delayed until 11:20 for RF work. First ten shots went well, although shots 1 and 2 used PCS setup loaded from shot 990908020 rather than 990908006 (I forgot to load PCS) and some shots had slight hesitation in current rise. The prepuff length was reduced first to 18 msec and then to 16 msec to help current rise. The lower x-point location was reprogrammed after shot 4 to avoid the x-point drift towards divertor inner nose. Shot 11 was a fizzle for no apparent reason. Shot 12 went OK without any PCS changes. Shot 13 disrupted right after going into H-mode due to a large (probably RF-caused) injection. Then followed a series of fizzles (4 shots) and shot 18 was a plasma again after multiple Bz - Br tweeks and after changing RCUR offset to push the plasma out after breakdown. Shots 18 and 19 disrupted (at 1.1 and .8 sec) probably because of RF. Scorecard: 19 shots 5 fizzles 14 plasmas 0 duds _________________________________________________ 990909001 Plasma going to 1.86 sec. No real RF on this shot. EF1_l supply went off just before the end of the shot at 1.83 sec - reason unknown. PCS changes for next shot: none 990909002 Plasma going to 1.87 sec. RF maximum - 1.2 MW. EF H-mode from .84 to .92 sec. Ohmic H-mode during rampdown (1.56 - 1.78 sec). EF1_l seems to be OK now. PCS changes for next shot: It turns out that the PCS was not loaded and we were running shot 990908020. Loaded 990908006. TF should now invert at 1.5 sec instead of 1.6 sec. Enabled Ar puff, pulse_gas1, programmed length - 25 msec. 990909003 Plasma. Two EF H-modes at .96 and 1.08 sec. RF max 1.5 MW (J3&4 and D together) PCS changes for next shot: The prepuff was programmed higher on this shot than on previous one and there is a slight hesitation in current rise. Reduced the prepuff from 20 msec to 18 msec 990909004 Plasma. 3 RF H-modes + 1 ohmic at rampdown. PCS changes for next shot: Reprogrammed R_XL and Z_XL to get rid of x-point drift towards inner nose. 990909005 Plasma. 3 RF H-modes (EF/EDA ?) Z_XL and R_XL are constant to 1.5 sec. PCS changes for next shot: none 990909006 Plasma. 3 RF H-modes (EDA ?) PCS changes for next shot: none 990909006 Reduced RCUR to .6675 from .669 to increase the right gap to 11 mm PCS changes for next shot: none 990909007 PLasma, 3 (EDA ?) H-modes. RF to 2.5 MW. PCS changes for next shot: none 990909008 Plasma. 3 EDA ? H-modes. Right gap is around 1 cm. Still some hesitation in current rise, but Br and Bz are jumping around from shot to shot and seem to be irrelevant. PCS changes for next shot: Reduced prepuff to 16 msec 990909009 Plasma. Multiple short H-modes, RF around 2 MW. Current rise is better. PCS changes for next shot: none 990909010 Plasma. 2 small H-modes, RF around 2 MW PCS changes for next shot: none 990909011 Fizzle. SPANA crashed right after the shot. PCS changes for next shot: Restarted PCS, loaded from 990909010. NO PCS changes. 990909012 Plasma. Small H-modes, RF around 2 MW. PCS changes for next shot: none 990909013 Plasma disrupted at .93 sec due to large injection 4 msec after L-H transition PCS changes for next shot: none 990909014 Fizzle. PCS changes for next shot: Make Br 1 mT more negative. 990909015 Fizzle. PCS changes for next shot: Add 2 msec of prepuff 990909016 Fizzle. Breakdown is at the right time. PCS changes for next shot: Return Br back (1 mT up) and set EF4 to -1285 from -1275. 990909017 Fizzle. PCS changes for next shot: Reduced RCUR offset from 5500 to 4500. 990909018 Plasma. Disrupted at 1.1 sec. PCS changes for next shot: none 990909019 Plasma. Disrupted at .8 sec after going into H-mode. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Sep 9 1999 09:06:24:640AM | Dmitri Mossessian | Run Plan and Engineering Setup for 990909: SL: Wukitch/Schilling PO: Mossessian This run will be a continuation of that scheduled for September 8, 1999. The general purpose will be to condition the RF antennas. The run is scheduled to start at 10:00 and end at 17:00 Engineering setup: Two hours ECDC in D2 prior to run, finishing at least 1 hour before run. Setup power supplies from 990908004 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 6 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled J-bottom pumped out Hybrid DISABLED PCS setup: Loaded shot 990908006. Coldstart OK. | |
| Sep 9 1999 11:27:35:950AM | 990909001 | Dmitri Mossessian | Plasma going to 1.86 sec. No real RF on this shot. EF1_l supply went off just before the end of the shot at 1.83 sec - reason unknown. No changes for next shot. |
| Sep 9 1999 11:54:50:357AM | 990909002 | Dmitri Mossessian | Plasma going to 1.87 sec. RF maximum - 1.2 MW. EF H-mode from .84 to .92 sec. Ohmic H-mode during rampdown (1.56 - 1.78 sec) EF1_l seems to be OK now. It turns out that the PCS was not loaded and we were running shot 990908020. Loaded 990908006. TF should now invert at 1.5 sec instead of 1.6 sec. Enabled Ar puff, pulse_gas1, programmed length - 25 msec. |
| Sep 9 1999 12:12:05:577PM | 990909003 | Dmitri Mossessian | Plasma. Two EF H-modes at .96 and 1.08 sec. RF max 1.5 MW (J3&4 and D together) The prepuff was programmed higher on this shot than on previous one and there is a slight hesitation in current rise. Reduced the prepuff from 20 msec to 18 msec |
| Sep 9 1999 12:41:06:060PM | 990909004 | Dmitri Mossessian | Plasma. 3 RF H-modes + 1 ohmic at rampdown. Reprogrammed R_XL and Z_XL to get rid of x-point drift towards inner nose. |
| Sep 9 1999 01:01:59:500PM | 990909005 | Dmitri Mossessian | Plasma. 3 RF H-modes (EF/EDA ?) Z_XL and R_XL are constant to 1.5 sec. No PCS changes for next shot. |
| Sep 9 1999 01:16:12:513PM | 990909006 | Dmitri Mossessian | Plasma. 3 RF H-modes (EDA ?) No PCS changes for next shot. |
| Sep 9 1999 01:22:16:297PM | 990909006 | Dmitri Mossessian | Reduced RCUR to .6675 from .669 to increase the right gap to 11 mm |
| Sep 9 1999 01:40:55:310PM | 990909007 | Dmitri Mossessian | PLasma, 3 (EDA ?) H-modes. RF to 2.5 MW. NO PCS changes. |
| Sep 9 1999 01:52:30:607PM | 990909008 | Dmitri Mossessian | Plasma. 3 EDA ? H-modes. Right gap is around 1 cm. Still some hesitation in current rise, but Br and Bz are jumping around from shot to shot and seem to be irrelevant. Reduced prepuff to 16 msec |
| Sep 9 1999 02:16:15:653PM | 990909009 | Dmitri Mossessian | Plasma. Multiple short H-modes, RF around 2 MW. Current rise is better. No PCS changes for next shot |
| Sep 9 1999 02:25:12:903PM | 990909010 | Dmitri Mossessian | Plasma. 2 small H-modes, RF around 2 MW |
| Sep 9 1999 03:06:36:700PM | 990909011 | Dmitri Mossessian | Fizzle. SPAN crashed right after the shot. Restarted PCS, loaded from 990909010. NO PCS changes. |
| Sep 9 1999 03:14:02:183PM | 990909012 | Dmitri Mossessian | Plasma. Small H-modes, RF around 2 MW. No changes for next shot |
| Sep 9 1999 03:29:58:670PM | 990909013 | Dmitri Mossessian | Plasma disrupted at .93 sec due to large injection 4 msec after L-H transition |
| Sep 9 1999 03:49:34:013PM | 990909014 | Dmitri Mossessian | Fizzle. Make Br 1 mT more negative. |
| Sep 9 1999 04:12:33:670PM | 990909015 | Dmitri Mossessian | Fizzle. Add 2 msec of prepuff |
| Sep 9 1999 04:25:08:687PM | 990909016 | Dmitri Mossessian | Fizzle. Breakdown is at the right time. Return Br back (1 mT up) and set EF4 to -1285 from -1275. |
| Sep 9 1999 04:42:58:700PM | 990909017 | Dmitri Mossessian | Fizzle. Reduced RCUR offset from 5500 to 4500. |
| Sep 9 1999 04:54:23:387PM | 990909018 | Dmitri Mossessian | Plasma. Disrupted at 1.1 sec. No PCS changes for next shot |
| Sep 9 1999 05:06:54:687PM | 990909019 | Dmitri Mossessian | Plasma. Disrupted at .8 sec after going into H-mode. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 11:04:50:420AM | Plasma | Bad | Plasma/faults on supplies 1 blown fuse EF1l |
| 2 | 11:33:36:123AM | Plasma | Ok | no faults/plasma |
| 3 | 11:56:33:483AM | Plasma | Ok | No Faults |
| 4 | 12:24:48:187PM | Plasma | Ok | no faults |
| 5 | 12:48:22:187PM | Plasma | Ok | no faults |
| 6 | 01:05:31:297PM | Plasma | Ok | no faults/plasma |
| 7 | 01:26:00:123PM | Plasma | Ok | no faults/plasma |
| 8 | 01:42:39:653PM | Plasma | Ok | no faults/plasma |
| 9 | 01:59:44:547PM | Plasma | Ok | no faults/plasma |
| 10 | 02:19:44:903PM | Plasma | Ok | no faults/plasma |
| 11 | 02:42:07:060PM | Plasma | Ok | no faults/plasma |
| 12 | 03:07:03:530PM | Plasma | Ok | no faults/plasma |
| 13 | 03:23:04:687PM | Plasma | Ok | no faults/plasma |
| 14 | 03:42:30:293PM | Plasma | Ok | no faults/fizzel |
| 15 | 03:58:04:903PM | Plasma | Ok | no faults/fizzel |
| 16 | 04:13:40:047PM | Plasma | Ok | no faults/fizzel |
| 17 | 04:27:46:843PM | Plasma | Ok | No Faults /fizzle |
| 18 | 04:45:01:250PM | Plasma | Ok | (null) |
| 19 | 05:00:06:437PM | Plasma | Ok | (null) |