| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| RF Conditioning/Snipes, Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:09:253PM |
| Author: To Be Determined |
| Run Plan for 990910 RF Conditioning Session Leader: Steve Wukitch Physics Operator: Joseph Snipes The run is scheduled to start at 9:00 and end at 17:00. The run will continue RF conditioning from yesterday with standard 1 MA, 5.2 T plasmas with nl04 = 1 x 10^20 m^-2. Engineering setup: Two hours ECDC in D2 prior to run, finishing at least 1 hour before run. Setup power supplies from 990909010 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 The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV, PCI Summary: The machine ran very well today with no engineering problems. The RF ran O.K. as well. Shot 1 had a nice long EDA H-mode with 1 MW of D port RF only. Then, there were many other shots with brief H-modes with either J3, J4, or D in combination. Impurities from the J port antenna were a problem, leading to a number of RF induced disruptions. There were also some impurity injections early in the discharge, one of which led to an early disruption. There were a few fizzles in the middle of the day following a long runaway shot (shot 12). Finally, an EF4 tweak made the current rises reliable again. It was a good RF conditioning run where I think the RF guys learned a lot. Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 1.870 0.987 2 1.870 0.977 3 1.870 0.977 4 0.817 1.018 5 1.890 0.977 6 0.490 1.003 7 1.870 0.977 8 1.198 1.029 9 1.870 0.977 10 1.186 0.987 11 0.893 1.044 12 0.969 1.054 13 0.000 0.041 14 0.870 1.029 15 0.000 0.041 16 1.870 0.977 17 0.788 1.039 18 1.890 0.977 19 1.880 0.977 20 1.880 0.974 21 1.870 0.977 22 1.870 0.987 23 1.870 0.987 Finished summary for 990910 Total of 23 shots. 23 shots. 21 plasmas. 2 fizzles. 0 duds. Shot 1: Loaded 990909010. Run delayed until 10:00 am to repair an arc in one of the RF transmitters. Good shot. Nice long EDA H-mode 0.82 - 1.25 s. D port antenna at 1 MW. Shot 2: Repeat. Good shot. Now with J3 and J4 instead of D port. PRF = 0.8 MW. Only a very brief H-mode, then some dithering. Large impurity injections at 0.83, 0.9 and 0.94 s during RF. Shot 3: Enabled Ar gas puff at 0.3 sec for 25 ms. NINJA puffing of He starting at 0.2 s for 0.1 s duration. D port transmitter breaking down due to humid air in its cavity, so we will not be able to use it today. Good shot. Up to 1.4 MW out of J port, no H-mode, just dithering. Shot 4: Repeat. Disrupted at 0.81 s after a large impurity injection during the RF. Radiated power begins to increase at 0.77 s apparently coming from the RF antenna heating up. J port up to 1.5 MW. Shot 5: Try again. Good shot. Two ELM-free H-modes between 1 - 1.2 s. RF up to 1.3 MW out of J port. Shot 6: Increased Br0 from 0.5 mT to 1 mT to correct for the Br drift at breakdown. Current rise looks fine. Disrupted at 0.5 s apparently due to a natural impurity injection. Shot 7: Reduced RCUR and increased CLEARIN before 0.5 sec to try to increase the gaps a bit to see if the small gaps resulted in the impurity injection on shot 6. Good shot. H-mode 0.95 - 1.1 s. PRF = 1.2 MW. Shot 8: Reduced Br0 by 0.5 mT back to 0.5 mT from 1 mT. Increased CLEARIN during the current rise to increase the inner gap a bit. Good shot. Disrupted at 1.18 s with increasing Prad throughout the RF pulse. No H-mode. Shot 9: Good shot. PRF = 1.2 MW. No H-mode. Impurity injection at 0.25 s Some dithering. Shot 10: No changes. Good shot. Disrupted at 1.18 s just before RF turns off. No H-mode. Impurities apparently burning off of the J port antenna. Locked mode at 1.17 s just before the disruption. PRF up to 1.5 MW. Shot 11: No changes. Disrupted at 0.9 s apparently due to RF generated impurities again. No H-mode. J port PRF = 1.5 MW. Shot 12: Hard x rays from 0.025 s. Fill pressure looks about the same. Still, I'll increase the pre-puff for the next shot to be sure. Nonetheless, the plasma continued until 0.96 s when it disrupted due to RF generated impurities again. PRF = 1.2 MW. Shot 13: Increased pre-puff from 16 ms to 19 ms duration. Fizzle! Shot 14: Increased EF4 current from -1275 to -1290 A at breakdown. Disrupted at 0.86 s during RF apparently due to RF generated impurities. PRF = 1.3 MW. Shot 15: Reduced EF4 current again now to -1270 A from -1290 A. Increased pre-puff from 19 ms to 20 ms duration to further reduce some small remaining hard x rays. Fizzle! Shot 16: Increased EF4 current again to -1285 A from -1270 A. Good shot. H-mode from 1.02 - 1.25 s. PRF over 2 MW with D, J3, and J4 on. Shot 17: No changes. Disrupted at 0.78 s during J4 RF with only 0.6 MW due to increased impurities. Shot 18: No changes. Good shot. Several short H-modes from 1.05 - 1.3 s during D port and J4 RF up to 1.5 MW. Shot 19: Good shot. Two H-modes from 1.05 - 1.3 s with 1.8 MW of RF from J3, J4, and D port. Shot 20: Repeat. Good shot. Impurity injections early at 0.22 and 0.32 s. H-modes from 1.05 - 1.3 s. PRF = 1.6 MW out of D and J4. Shot 21: Repeat. Good shot. Nice EDA H-mode from 1.07 - 1.3 s with D port RF up to 1 MW. J3 gets up to 0.4 MW but switches off at 1 s. Shot 22: Repeat. Good shot. Two H-modes from 0.59 - 0.88 s mostly with D port, at 1 MW plus a short phase with J3 and J4 up to a total of 1.5 MW. Shot 23: Repeat. Good shot with two H-modes from 0.7 - 1.1 s. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Sep 10 1999 09:26:43:763AM | 990910001 | Joseph Snipes | Run Plan for 990910 RF Conditioning Session Leader: Steve Wukitch Physics Operator: Joseph Snipes The run is scheduled to start at 9:00 and end at 17:00. The run will continue RF conditioning from yesterday with standard 1 MA, 5.2 T plasmas with nl04 = 1 x 10^20 m^-2. Engineering setup: Two hours ECDC in D2 prior to run, finishing at least 1 hour before run. Setup power supplies from 990909010 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 The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV, PCI |
| Sep 10 1999 10:36:25:107AM | 990910001 | Joseph Snipes | Shot 1: Loaded 990909010. Run delayed until 10:00 am to repair an arc in one of the RF transmitters. Good shot. Nice long EDA H-mode 0.82 - 1.25 s. D port antenna at 1 MW. |
| Sep 10 1999 10:37:11:450AM | 990910002 | Joseph Snipes | Shot 2: Repeat. Good shot. Now with J3 and J4 instead of D port. PRF = 0.8 MW Only a very brief H-mode, then some dithering. Large impurity injections at 0.83, 0.9, and 0.94 s. |
| Sep 10 1999 10:53:27:467AM | 990910003 | Joseph Snipes | Shot 3: Enabled Ar gas puff at 0.3 sec for 25 ms. NINJA puffing of He starting at 0.2 s for 0.1 s duration. D port transmitter breaking down due to humid air in its cavity, so we will not be able to use it today. Good shot. Up to 1.4 MW out of J port, no H-mode, just dithering. |
| Sep 10 1999 11:17:49:607AM | 990910004 | Joseph Snipes | Shot 4: Repeat. Disrupted at 0.81 s after a large impurity injection during the RF. Radiated power begins to increase at 0.77 s apparently coming from the RF antenna heating up. J port up to 1.5 MW. |
| Sep 10 1999 11:27:23:810AM | 990910005 | Joseph Snipes | Shot 5: Try again. Good shot. Two ELM-free H-modes between 1 - 1.2 s. RF up to 1.3 MW out of J port. |
| Sep 10 1999 11:44:35:903AM | 990910006 | Joseph Snipes | Shot 6: Increased Br0 from 0.5 mT to 1 mT to correct for the Br drift at breakdown. Current rise looks fine. Disrupted at 0.5 s apparently due to a natural impurity injection. |
| Sep 10 1999 11:55:26:340AM | 990910007 | Joseph Snipes | Shot 7: Reduced RCUR and increased CLEARIN before 0.5 sec to try to increase the gaps a bit to see if the small gaps resulted in the impurity injection on shot 6. Good shot. H-mode 0.95 - 1.1 s. PRF = 1.2 MW. |
| Sep 10 1999 12:15:24:170PM | 990910008 | Joseph Snipes | Shot 8: Reduced Br0 by 0.5 mT back to 0.5 mT from 1 mT. Increased CLEARIN during the current rise to increase the inner gap a bit. Good shot. Disrupted at 1.18 s with increasing Prad throughout the RF pulse. No H-mode. |
| Sep 10 1999 12:40:46:903PM | 990910009 | Joseph Snipes | Shot 9: Good shot. PRF = 1.2 MW. No H-mode. Impurity injection at 0.25 s Some dithering. |
| Sep 10 1999 01:09:42:547PM | 990910010 | Joseph Snipes | Shot 10: No changes. Good shot. Disrupted at 1.18 s just before RF turns off. No H-mode. Impurities apparently burning off of the J port antenna. Locked mode at 1.17 s just before the disruption. PRF up to 1.5 MW. |
| Sep 10 1999 01:12:22:717PM | 990910011 | Joseph Snipes | Shot 11: No changes. Disrupted at 0.9 s apparently due to RF generated impurities again. No H-mode. J port PRF = 1.5 MW. |
| Sep 10 1999 01:34:26:810PM | 990910012 | Joseph Snipes | Shot 12: Hard x rays from 0.025 s. Fill pressure looks about the same. Still, I'll increase the pre-puff for the next shot to be sure. Nonetheless, the plasma continued until 0.96 s when it disrupted due to RF generated impurities again. PRF = 1.2 MW. |
| Sep 10 1999 01:54:06:030PM | 990910013 | Joseph Snipes | Shot 13: Increased pre-puff from 16 ms to 19 ms duration. Fizzle! |
| Sep 10 1999 02:34:51:810PM | 990910014 | Joseph Snipes | Shot 14: Increased EF4 current from -1275 to -1290 A at breakdown. Disrupted at 0.86 s during RF apparently due to RF generated impurities. PRF = 1.3 MW. |
| Sep 10 1999 02:40:59:750PM | 990910015 | Joseph Snipes | Shot 15: Reduced EF4 current again now to -1270 A from -1290 A. Increased pre-puff from 19 ms to 20 ms duration to further reduce some small remaining hard x rays. Fizzle! |
| Sep 10 1999 02:58:41:843PM | 990910016 | Joseph Snipes | Shot 16: Increased EF4 current again to -1285 A from -1270 A. Good shot. H-mode from 1.02 - 1.25 s. PRF over 2 MW with D, J3, and J4 on. |
| Sep 10 1999 03:16:22:607PM | 990910017 | Joseph Snipes | Shot 17: No changes. Disrupted at 0.78 s during J4 RF with only 0.6 MW due to increased impurities. |
| Sep 10 1999 03:28:11:920PM | 990910018 | Joseph Snipes | Shot 18: No changes. Good shot. Several short H-modes from 1.05 - 1.3 s during D port and J4 RF up to 1.5 MW. |
| Sep 10 1999 03:52:19:263PM | 990910019 | Joseph Snipes | Shot 19: Good shot. Two H-modes from 1.05 - 1.3 s with 1.8 MW of RF from J3, J4, and D port. |
| Sep 10 1999 04:05:09:797PM | 990910020 | Joseph Snipes | Shot 20: Repeat. Good shot. Impurity injections early at 0.22 and 0.32 s. H-modes from 1.05 - 1.3 s. PRF = 1.6 MW out of D and J4. |
| Sep 10 1999 04:22:33:170PM | 990910021 | Joseph Snipes | Shot 21: Repeat. Good shot. Nice EDA H-mode from 1.07 - 1.3 s with D port RF up to 1 MW. J3 gets up to 0.4 MW but switches off at 1 s. |
| Sep 10 1999 04:41:39:750PM | 990910022 | Joseph Snipes | Shot 22: Repeat. Good shot. Two H-modes from 0.59 - 0.88 s mostly with D port, at 1 MW plus a short phase with J3 and J4 up to a total of 1.5 MW. |
| Sep 10 1999 04:57:07:637PM | 990910023 | Joseph Snipes | Shot 23: Repeat. Good shot with two H-modes from 0.7 - 1.1 s. |
| Sep 10 1999 04:58:26:763PM | 990910023 | Joseph Snipes | Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 1.870 0.987 2 1.870 0.977 3 1.870 0.977 4 0.817 1.018 5 1.890 0.977 6 0.490 1.003 7 1.870 0.977 8 1.198 1.029 9 1.870 0.977 10 1.186 0.987 11 0.893 1.044 12 0.969 1.054 13 0.000 0.041 14 0.870 1.029 15 0.000 0.041 16 1.870 0.977 17 0.788 1.039 18 1.890 0.977 19 1.880 0.977 20 1.880 0.974 21 1.870 0.977 22 1.870 0.987 23 1.870 0.987 Finished summary for 990910 Total of 23 shots. 23 shots. 21 plasmas. 2 fizzles. 0 duds. |
| Sep 10 1999 05:00:33:200PM | 990910023 | Joseph Snipes | Summary: The machine ran very well today with no engineering problems. The RF ran O.K. as well. Shot 1 had a nice long EDA H-mode with 1 MW of D port RF only. Then, there were many other shots with brief H-modes with either J3, J4, or D in combination. Impurities from the J port antenna were a problem, leading to a number of RF induced disruptions. There were also some impurity injections early in the discharge, one of which led to an early disruption. There were a few fizzles in the middle of the day following a long runaway shot (shot 12). Finally, an EF4 tweak made the current rises reliable again. It was a good RF conditioning run where I think the RF guys learned a lot. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 10:03:39:433AM | Plasma | Ok | 10:03 shot#1/no faults/plasma |
| 2 | 10:24:38:840AM | Plasma | Ok | No Faults/ Plasma |
| 3 | 10:43:45:343AM | Plasma | Ok | (null) |
| 4 | 11:00:33:920AM | Plasma | Ok | (null) |
| 5 | 11:17:35:700AM | Plasma | Ok | (null) |
| 6 | 11:34:33:093AM | Plasma | Ok | (null) |
| 7 | 11:48:10:967AM | Plasma | Ok | (null) |
| 8 | 12:08:53:310PM | Plasma | Ok | (null) |
| 9 | 12:23:54:873PM | Plasma | Ok | (null) |
| 10 | 12:49:08:937PM | Plasma | Ok | (null) |
| 11 | 01:05:36:763PM | Plasma | Ok | (null) |
| 12 | 01:24:18:717PM | Plasma | Ok | (null) |
| 13 | 01:43:34:343PM | Plasma | Ok | (null) |
| 14 | 02:19:51:780PM | Plasma | Ok | (null) |
| 15 | 02:39:32:000PM | Plasma | Ok | (null) |
| 16 | 02:52:31:653PM | Plasma | Ok | (null) |
| 17 | 03:10:14:717PM | Plasma | Ok | (null) |
| 18 | 03:23:25:280PM | Plasma | Ok | (null) |
| 19 | 03:43:04:420PM | Plasma | Ok | (null) |
| 20 | 03:59:41:000PM | Plasma | Ok | (null) |
| 21 | 04:17:40:437PM | Plasma | Ok | (null) |
| 22 | 04:35:06:450PM | Plasma | Ok | (null) |
| 23 | 04:53:12:593PM | Plasma | Ok | (null) |