| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| MP214 ICRF Conditioning/Wukitch/Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:20:197PM |
| Author: To Be Determined |
| Run Plan for 990421 ICRF Conditioning Engineering Setup for Tuesday, 990421 ICRF Conditioning Load from 990420021 The run will not start until 9:00 am in order to allow 1 hour for ICRF maintenance. 2 hours of ECDC in D2 Vacuum conditioned D and E-port antennas to ~40 kV last night. Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 6 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled fill J-bottom with 30 psi of D2 Hybrid enabled The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV ------------------------------------------------------------------------------- Run Plan for 990420 MP 214: ICRF conditioning We will use J-bottom gas valve for the main D2 gas after 0.1 sec into the discharge to test if this affects antenna performance. 001 Laser interferometer test 002 plasma elmy H-mode screen overcurrent on #1 (D-port) ~0.7 sec 1 MW from E next shot: adjust tune on D and E raise power to 1.2 MW each 003 plasma elmy H-mode screen overcurrent on #1 (D-port) ~0.65 sec 1.3 MW from E next shot: lower D-port power 004 plasma elmy H-mode still have screen current excursions on #1 faults on D at 1 sec 1.3 MW from E 1.4 MW from D next shot: repeat with 10% more power on D 005 plasma H-mode screen current fault on #1 after 1 sec faults on D after 1 sec 1.3 MW from E 1.4 MW from D 006 plasma H-mode screen current fault on #1 after 1 sec faults on D after 1 sec 1.3 MW from E 1.4 MW from D oops no discharge - igor glitch 007 computer glitch 008 next shot: ramp D-port to get power calibration D-port MW coefficients: [-.839701,.516632,-2.32395] 009 plasma H-mode good ramp 010 plasma few trips on D-port clean E next shot: increase power on D by 20% 011 plasma few trips on D-port [-.839701,.516632,-2.32395] J-port vacuum testing Bira3 [kW] kkV] Bira4 579 .5-1. .5-1. 580 1.-1.5 12 .4 kV 1.-1.5 12 581 1.-1.5 12 1.-1.5 12 checked DC2 signals and set thresholds and ratios for arc detection 582 1.-1.5 12 1.-1.5 12 good gas puff (5.e-7) 583 584-586 repeats 587 first decent match for #3 588 first decent match for #4 589 good shot for both 590 1.4-1.5 49 1.9-2 66 Good progress on J. It took about 9 shots into vacuum for #3 and #4 to have a good match. We think this was due to multipacking. The match look excellent with network analyzer and initially it looked poor into vacuum. A signature of the multipacking is the reflected power increases while the forword drops and a significant amount of gas evolves (5x10-6 torr). We still have problems with data aquisition, signal processing, and arc detection thresholds and ratios. Further work is needed to obtain DC1 calibration factors. D and E conditioning improved today - 2.5 MW was injected with few faults. However a limited number of discharges due to a loss of DI water (FMIT#1 water input broke open) did not allow adequate assessment of gas fueling issue. One interesting item was that about 1.5 MW was obtained from D at 80.6 MHz instead of 80.5 MHz. Difficulty was experienced in tuning, power control, and a lower threshold for screen overcurrent crowbars. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:00:957PM |
| Author: To Be Determined |
| 990421001 SNIPES PHYSICS_OPERATOR Apr 21 1999 9:40:55:576AM . . . . . . . . . . . . . . . . . . . . MP214 ICRF Conditioning Engineer in Charge: Frank Silva Physics Operator: Joseph Snipes Session Leader: Steve Wukitch Start with 990420021 with main D2 gas fuelling after 0.1 sec from J-bottom to see if local gas near the antennas may be causing arcing in the antennas at high density. Summary: The machine ran rather well. The RF ran O.K. with up to 2.5 MW for about 0.5 sec. However, they had problems tuning and a cooling water pipe burst on one of the RF transmitters flooding the RF area of the power room and ending the run at about 12:30 pm. By analyzing the fast magnetic pick-up coil signals, I noticed that the RF beat frequency had shifted to 600 kHz rather than its usual 500 kHz. After the run, Fridberg and I checked and found that indeed, the D port frequency had been inadvertently set to 80.6 MHz instead of its usual 80.5 MHz. It has now been reset to 80.5 MHz for tomorrow. Shot 1: Loaded 990420021. Coldstart of hybrid is o.k. Start with an EF3 only test since there was a problem with EF3 on the last shot yesterday. Shot 2: EF3 test went fine on shot 1. This shot also went well. Plasma. Type III ELMy H-mode throughout RF pulse. RF reached 2 MW briefly, then dropped to 1 MW for a bit more than 0.5 sec. Shot 3: Good shot. In and out of Type III ELMy H-mode/ELM-free H-mode throughout the RF pulse. RF briefly touched 3 MW then dropped to about 1.3 MW throughout the remainder of the RF pulse. Shot 4: Good shot. RF stayed on except for a few glitches at nearly 2.5 MW. Short EDA followed by ELM-free and Type III ELMy H-modes. Shot 5: Good shot. RF seems to be improving. Steady EDA-like H-mode, though with very high recycling. RF stays on at about 2.6 MW for most of the flattop, then trips near the end. Shot 6: Good shot. Steady EDA-like H-mode, though with very high recycling. RF stays on at about 2.6 MW for most of the flattop, then trips near the end. Reduced prepuff from 18 msec to 16 msec. Shot 7: Short delay for RF maintenance in the power room. Problem between IGOR and state in the computers. This shot was not run. Shot 8: Dud due to problems resetting after the IGOR problem on shot 7. No TF. Shot 9: Good shot. Ramping RF power up to 2.5 MW. Alternating Type III ELMy and ELM-free H-mode. Shot 10:Good shot. RF power up to 2.3 MW throughout most of the pulse. Ratty H-mode changing between a brief EDA at the beginning to Type III ELMy and ELM-free alternating H-mode. Shot 11:Good shot. RF power up to 2.4 MW throughout most of the pulse. Ratty H-mode similar to shot 10. Shot 12:Raised nl04 programming to 1.4 x 10^20 m^-2. Reduced prepuff to 14 msec duration. No chance to run the shot. A water pipe burst on the cooling for one of the RF transmitters and the RF power room area is flooded. End of the run. Summary: 11 shots 8 good plasmas 1 test shot 2 computer faults |
| Session Leader Comments | |||
| Apr 21 1999 09:39:11:013AM | 990421002 | Steve Wukitch | 002 plasma elmy H-mode screen overcurrent on #1 (D-port) ~0.7 sec 1 MW from E |
| Apr 21 1999 10:06:14:937AM | 990421003 | Steve Wukitch | 003 plasma elmy H-mode screen overcurrent on #1 (D-port) ~0.65 sec 1.3 MW from E next shot: lower D-port power |
| Apr 21 1999 10:20:04:293AM | 990421004 | Steve Wukitch | 004 plasma elmy H-mode still have screen current excursions on #1 faults on D at 1 sec 1.3 MW from E 0.8 kW from D next shot: repeat with 10% more power on D |
| Apr 21 1999 11:04:57:763AM | 990421005 | Steve Wukitch | 005 plasma H-mode screen current fault on #1 after 1 sec faults on D after 1 sec 1.3 MW from E 1.4 MW from D |
| Apr 21 1999 11:05:17:230AM | 990421006 | Steve Wukitch | 006 plasma H-mode screen current fault on #1 after 1 sec faults on D after 1 sec 1.3 MW from E 1.4 MW from D |
| Apr 22 1999 08:40:07:390AM | 990421009 | Steve Wukitch | 009 plasma H-mode good ramp |
| Apr 22 1999 08:40:21:733AM | 990421010 | Steve Wukitch | 010 plasma few trips on D-port clean E next shot: increase power on D by 20% |
| Apr 22 1999 08:40:38:140AM | 990421011 | Steve Wukitch | 011 plasma few trips on D-port |
| Physics Operator Comments | |||
| Apr 21 1999 09:40:55:577AM | 990421001 | Joseph Snipes | MP214 ICRF Conditioning Engineer in Charge: Frank Silva Physics Operator: Joseph Snipes Session Leader: Steve Wukitch Start with 990420021 with main D2 gas fuelling after 0.1 sec from J-bottom to see if local gas near the antennas may be causing arcing in the antennas at high density. Shot 1: Loaded 990420021. Coldstart of hybrid is o.k. Start with an EF3 only test since there was a problem with EF3 on the last shot yesterday. |
| Apr 21 1999 09:40:25:623AM | 990421002 | Joseph Snipes | Shot 2: EF3 test went fine on shot 1. This shot also went well. Plasma. Type III ELMy H-mode throughout RF pulse. RF reached 2 MW briefly, then dropped to 1 MW for a bit more than 0.5 sec. |
| Apr 21 1999 10:02:12:420AM | 990421003 | Joseph Snipes | Shot 3: Good shot. In and out of Type III ELMy H-mode/ELM-free H-mode throughout the RF pulse. RF briefly touched 3 MW then dropped to about 1.3 MW throughout the remainder of the RF pulse. |
| Apr 21 1999 10:13:33:497AM | 990421004 | Joseph Snipes | Shot 4: Good shot. RF stayed on except for a few glitches at nearly 2.5 MW. Short EDA followed by ELM-free and Type III ELMy H-modes. |
| Apr 21 1999 10:39:09:343AM | 990421005 | Joseph Snipes | Shot 5: Good shot. RF seems to be improving. Steady EDA-like H-mode, though with very high recycling. RF stays on at about 2.6 MW for most of the flattop, then trips near the end. |
| Apr 21 1999 10:52:37:890AM | 990421006 | Joseph Snipes | Shot 6: Good shot. Steady EDA-like H-mode, though with very high recycling. RF stays on at about 2.6 MW for most of the flattop, then trips near the end. Reduced prepuff from 18 msec to 16 msec. |
| Apr 21 1999 11:19:35:717AM | 990421007 | Joseph Snipes | Shot 7: Short delay for RF maintenance in the power room. Problem between IGOR and state in the computers. This shot was not run. |
| Apr 21 1999 11:24:10:810AM | 990421008 | Joseph Snipes | Shot 8: Dud due to problems resetting after the IGOR problem on shot 7. No TF. |
| Apr 21 1999 12:00:45:840PM | 990421009 | Joseph Snipes | Shot 9: Good shot. Ramping RF power up to 2.5 MW. Alternating Type III ELMy and ELM-free H-mode. |
| Apr 21 1999 12:04:10:263PM | 990421010 | Joseph Snipes | Shot 10:Good shot. RF power up to 2.3 MW throughout most of the pulse. Ratty H-mode changing between a brief EDA at the beginning to Type III ELMy and ELM-free alternating H-mode. |
| Apr 21 1999 12:17:19:077PM | 990421011 | Joseph Snipes | Shot 11:Good shot. RF power up to 2.4 MW throughout most of the pulse. Ratty H-mode similar to shot 10. |
| Apr 21 1999 12:35:08:763PM | 990421011 | Joseph Snipes | Shot 12: Raised nl04 programming to 1.4 x 10^20 m^-2. Reduced prepuff to 14 msec duration. No chance to run the shot. A water pipe burst on the cooling for one of the RF transmitters and the RF power room area is flooded. End of the run. |
| Apr 21 1999 01:52:45:513PM | 990421011 | Joseph Snipes | The machine ran rather well. The RF ran O.K. with up to 2.5 MW for 0.5 sec or so. However, they had problems tuning and a cooling water pipe burst on one of the RF transmitters flooding the RF area of the power room and ending the run at about 12:30 pm. By analyzing the fast magnetic pick-up coil signals, I noticed that the RF beat frequency had shifted to 600 kHz rather than its usual 500 kHz. After the run, Fridberg and I checked and found that indeed, the D port frequency had been inadvertently set to 80.6 MHz instead of its usual 80.5 MHz. It has now been reset to 80.5 MHz for tomorrow. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:19:16:687AM | Test | Ok | EF3 PLC controled test/ OK |
| 2 | 09:32:29:840AM | Plasma | Ok | no faults/plasma |
| 3 | 09:48:56:450AM | Plasma | Ok | no faults/plasma |
| 4 | 10:06:55:093AM | Plasma | Ok | no faults/plasma |
| 5 | 10:24:44:093AM | Plasma | Ok | no faults/plasma |
| 6 | 10:46:09:903AM | Plasma | Ok | no faults/plasma |
| 7 | 11:03:18:140AM | Plasma | Bad | no pulse Igor problem |
| 8 | 11:20:48:920AM | Plasma | Bad | igor /PLC sync problem/no EF1u,l no TF no OH1 |
| 9 | 11:34:29:670AM | Plasma | Ok | no faults/plasma |
| 10 | 11:57:41:497AM | Plasma | Ok | no faults/plasma |
| 11 | 12:13:22:903PM | Plasma | Ok | no faults/plasma |