| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yuichi Takase,Yuichi Takase |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| mp159,133/takase,snipe |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:16:320PM |
| Author: To Be Determined |
| 1st part of 960827 Run summary 960827 (Part 1) SL: Takase PO: Snipes EO: Silva MP159 RF Conditioning MP133 Post-boron fiducials Run Plan: Conditioning of E-port antenna at low density in an attempt to determine whether the poor heating we have been seeing is due to high H concentration or insufficient antenna conditioning. D-port antenna is not available today (fixing water leak in the transmitter). In the afternoon (circumstances permitting) the run will be handed over to MP156A 1.5MA 8 Tesla or MP161 Low triangularity. Run Summary: 2nd overnight ECDC boronization (11 hrs. 1300 Angstroms of boron deposited) of the campaign last night, followed by 2hrs. He ECDC. We have made some progress in RF conditioning. H-mode quality seems to be improving. There was an RF interference problem on EF4, caused by up to 5kW of RF power transmitted back from the D-port antenna to the power room. The water leak have been fixed and the transmitter should be connected to the antenna tonight. Shot 01 test TF scanner test 02 test OH test 03 pla* Nice shot, nel=1.0, P_E=1.75MW 04 dud 05 fiz 06 fiz 07 pla disr @ 0.58s 08 dud 09 pla disr @ 0.54s, inj @ 0.43s 10 dud 11 dud 12 dud 13 dud fixed \rf_power_rad 14 pla* disr @ 0.79s (EF4), weak H-mode @ 0.66s long delay to fix EF4 15 test EF4 test 16 test EF4 test 17 test EF4 test 18 dud 19 fiz 20 pla* lost EF4 (RF pickup from disconnected D-port transmission line) nel=0.9 + H-mode, Te0(peak)=4keV, Ti0=2keV, W_EFIT=80kJ, P_E=1.5MW, 3.e12 neuts/s |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:56:677PM |
| Author: To Be Determined |
| MP159 RF Conditioning Session Leader: Yuichi Takase Physics Operator: Joseph Snipes Engineer in Charge: Frank Silva After overnight boronization (1300 A) and 1 hr 45 min He ECDC this morning, we will start with setup for shot 960823016 after a scanner test shot and an OH test shot. The idea will be to run standard discharges at 5.4 T and 0.8 MA to first do RF conditioning. The goals were not exactly accomplished. Only 5 plasmas were made and ICRF was coupled up to about 1.5 MW on transmitter 2. Transmitter 1 was wide open under repair. Fuses were blown on EF4 on shots 14 and 20. The 3 hour delay after shot 14 to replace fuses also resulted in large changes in the hybrid offsets perhaps due to changes in the hybrid wiring during the break. The Br offset was at about 6.5 mT to get plasmas by the end of the day. EF4 currents also had to be reduced to get the vertical field right. The last setting that worked was at -1375 A at breakdown. It appears that the open RF transmission line was transmitting reflected power during the H-mode back to the power room and interfering with the EF4 control circuit, leading to the EF4 failures. Shot 1: Scanner test. Shot 2: OH test Shot 3: Copied shot 960823016, increased density to 1.0 x 10^20 m^-2. Moved RXL gain step down from 1.2 to 1.32 sec. Set pre-puff to 14 msec. Moved RXL in by 5 mm and ZXL up a tad to -0.01 m. Good plasma all the way down lasting to 1.65 sec. Shot 4: Reduced nl04 to 9 x 10^19 m^-2. Moved ZCUR down from -0.005 to -0.012 m during the flattop. Dud! Shot 5: Br offset moved down 0.5 mT to 2.0 mT. Fizzle! Shot 6: Br offset changed to 3.0 mT. Fizzle. Shot 7: Br offset changed to 2.5 mT. Got plasma. Disrupted at 0.55 sec. OH2 fault accompanied by a moly injection. Shot 8: Repeat. Dud! Shot 9: Repeat. Got plasma. Disrupted at 0.54. Another moly injection. Looks like RXL is way off. Shot 10:RXL set to 0 during the flattop from 0.01 m. Dud! Shot 11:Reloaded shot 960823019. Changed RXL gain to extend out to 1.32 sec, then step down at 1.4 sec. Density set to 9 x 10^19 m^-2. ZXL set to -0.01 m. Pre-puff set to 14 msec. RXL left at +0.005 m. Dud. Shot 12:Raised Br offset to 3 mT. Increased pre-puff to 15 msec. Dud. Shot 13:Reloaded shot 960827003 segment 1 into segment 1. Dud. Shot 14:EF4 current moved up from -1450 to -1425 to increase Bz by 2 mT. Increased Br offset to 3 mT. Got plasma. EF4 failure. Disrupted at 0.8 sec. Itsy bitsy H-mode from 0.66 to 0.71 sec. Long delay to look into the EF4 and possible other power supply problems. Shot 15:EF4 test shot Shot 16:EF4 test shot Shot 17:EF4 test shot Shot 18:Changed gains on EF4 to step down at 0.248 instead of 0.492 so that the change in gain on the EF2 by EF4 controller at 0.248 does not fight EF4 so much. Dud! Shot 19:Moved Ar puff to 0.3 - 0.344 sec. Previously, it started at 0.35 sec. Changed EF4 current to -1390 A and Br offset to 5 mT. It appears that the coils became cold during the wait and the fields changed. Fizzle! Shot 20:Changed EF4 current to -1375 A and Br offset to 6.5 mT. Got plasma. Disrupted at 0.9 sec. EF4 fuses blown again. Problems start during RF pulse at the H-mode. H-mode from about 0.62 to 0.72 sec. Wolfe proposes that the EF4 problems might be caused by RF pickup in the power room from reflected power down the open transmission line to transmitter 1. Scorecard: 20 Shots 5 plasmas 3 fizzles 7 duds 5 test shots |
| Session Leader Comments | |||
| Aug 27 1996 09:20:19:470AM | Yuichi Takase | 1st part of 960827
SL: Takase PO: Snipes EO: Silva MP159 RF Conditioning MP133 Post-boron fiducials Conditioning of E-port antenna at low density in an attempt to determine whether the poor heating we have been seeing is due to high H concentration or insufficient antenna conditioning. D-port antenna is not available today (fixing water leak in the transmitter). In the afternoon (circumstances permitting) the run will be handed over to MP156A 1.5MA 8 Tesla or MP161 Low triangularity. | |
| Aug 27 1996 09:26:34:610AM | Yuichi Takase | 2nd overnight ECDC boronization (11 hrs. 1300 Angstroms of boron
deposited) of the campaign last night, followed by 2hrs. He ECDC. | |
| Aug 27 1996 09:27:52:090AM | 960827001 | Yuichi Takase | Shot 001
TF scanner test |
| Aug 27 1996 09:28:30:960AM | 960827002 | Yuichi Takase | Shot 002
OH test |
| Aug 27 1996 10:06:17:670AM | 960827003 | Yuichi Takase | Shot 003 Plasma
nel=1.0 programmed. nel=1.0, P_E=1.75MW. |
| Aug 27 1996 10:06:34:200AM | 960827003 | Yuichi Takase | Shot 004 Dud
|
| Aug 27 1996 10:07:32:550AM | 960827005 | Yuichi Takase | Shot 005 Fizzle
|
| Aug 27 1996 10:18:20:620AM | 960827006 | Yuichi Takase | Shot 006 Fizzle
|
| Aug 27 1996 10:44:18:780AM | 960827007 | Yuichi Takase | Shot 007 plasma
disr @ 0.58s |
| Aug 27 1996 10:47:50:830AM | 960827008 | Yuichi Takase | Shot 008 dud
|
| Aug 27 1996 10:59:33:230AM | 960827009 | Yuichi Takase | Shot 009 plasma
disr @ 0.54s, inj @ 0.43s |
| Aug 27 1996 11:57:30:710AM | 960827010 | Yuichi Takase | Shot 010 dud
|
| Aug 27 1996 11:57:39:160AM | 960827011 | Yuichi Takase | Shot 011 dud
|
| Aug 27 1996 11:57:47:690AM | 960827012 | Yuichi Takase | Shot 012 dud
|
| Aug 27 1996 11:57:55:270AM | 960827013 | Yuichi Takase | Shot 013 dud
|
| Aug 27 1996 03:09:27:200PM | 960827014 | Yuichi Takase | Shot 014 plasma
disr @ 0.79s (EF4 problem) weak H-mode @ 0.66s \rf_power_rad signal fixed. |
| Aug 27 1996 03:09:56:110PM | 960827015 | Yuichi Takase | Shot 015 EF4 test (after a long delay)
|
| Aug 27 1996 03:30:56:120PM | 960827016 | Yuichi Takase | Shot 016 another EF4 test
|
| Aug 27 1996 03:42:25:260PM | 960827017 | Yuichi Takase | Shot 017 yet another EF4 test
|
| Aug 27 1996 04:01:54:850PM | 960827018 | Yuichi Takase | Shot 018 dud
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| Aug 27 1996 06:12:17:890PM | 960827020 | Yuichi Takase | Shot 020 plasma
lost EF4 (RF pickup from disconnected D-port transmission line) nel=0.9 + H-mode, Te0(peak)=4keV, Ti0=2keV, W_EFIT=80kJ, P_E=1.5MW, 3.e12 neuts/s |
| Physics Operator Comments | |||
| Aug 27 1996 09:26:43:010AM | Joseph Snipes | MP159 RF Conditioning
Session Leader: Yuichi Takase Physics Operator: Joseph Snipes Engineer in Charge: Frank Silva After overnight boronization (1300 A) and 1 hr 45 min He ECDC this morning, we will start with setup for shot 960823016 after a scanner test shot and an OH test shot. The idea will be to run standard discharges at 5.4 T and 0.8 MA to first do RF conditioning. | |
| Aug 27 1996 09:27:21:340AM | 960827001 | Joseph Snipes | Shot 1: Scanner test.
|
| Aug 27 1996 09:27:39:690AM | 960827002 | Joseph Snipes | Shot 2: OH test. O.K.
|
| Aug 27 1996 09:52:06:540AM | 960827003 | Joseph Snipes | Shot 3: Copied shot 960823016, increased density to 1.0 x 10^20 m^-2.
Moved RXL gain step down from 1.2 to 1.32 sec. Set pre-puff to 14 msec. Moved RXL in by 5 mm and ZXL up a tad to -0.01 m. Good plasma all the way down lasting to 1.65 sec. |
| Aug 27 1996 09:52:40:240AM | 960827004 | Joseph Snipes | Shot 4: Reduced nl04 to 9 x 10^19 m^-2. Moved ZCUR down from -0.005 to -0.012
m during the flattop. Dud! |
| Aug 27 1996 10:13:52:510AM | 960827005 | Joseph Snipes | Shot 5: Br offset moved down 0.5 mT to 2.0 mT. Fizzle!
|
| Aug 27 1996 10:36:52:740AM | 960827006 | Joseph Snipes | Shot 6: Br offset changed to 3.0 mT. Fizzle.
|
| Aug 27 1996 10:38:29:080AM | 960827007 | Joseph Snipes | Shot 7: Br offset changed to 2.5 mT. Got plasma. Disrupted at 0.55 sec.
OH2 fault. |
| Aug 27 1996 10:46:13:800AM | 960827008 | Joseph Snipes | Shot 8: Repeat. Dud!
|
| Aug 27 1996 11:35:32:130AM | 960827009 | Joseph Snipes | Shot 9: Repeat. Plasma. Disrupted at 0.54. Another moly injection.
Looks like RXL is way off. |
| Aug 27 1996 11:35:54:200AM | 960827010 | Joseph Snipes | Shot 10:RXL set to 0 during the flattop from 0.01 m. Dud!
|
| Aug 27 1996 11:36:11:520AM | 960827011 | Joseph Snipes | Shot 11:Reloaded shot 960823019. Changed RXL gain to extend out to 1.32 sec,
then step down at 1.4 sec. Density set to 9 x 10^19 m^-2. ZXL set to -0.01 m. Pre-puff set to 14 msec. RXL left at +0.005 m. Dud. |
| Aug 27 1996 12:24:07:720PM | 960827012 | Joseph Snipes | Shot 12:Raised Br offset to 3 mT. Increased pre-puff to 15 msec.
Dud. |
| Aug 27 1996 12:24:35:490PM | 960827013 | Joseph Snipes | Shot 13:Reloaded shot 960827003 segment 1 into segment 1. Dud.
|
| Aug 27 1996 12:24:57:740PM | 960827014 | Joseph Snipes | Shot 14:EF4 current moved up from -1450 to -1425 to increase Bz by 2 mT.
Increased Br offset to 3 mT. Got plasma. EF4 failure. Disrupted at 0.8 sec. |
| Aug 27 1996 12:36:53:570PM | 960827014 | Joseph Snipes | Shot 14:EF4 current moved up from -1450 to -1425 to increase Bz by 2 mT.
Increased Br offset to 3 mT. Got plasma. EF4 failure. Disrupted at 0.8 sec. Itsy bitsy H-mode from 0.66 to 0.71 sec. Long delay to look into the EF4 and possible other power supply problems. |
| Aug 27 1996 03:27:34:790PM | 960827015 | Joseph Snipes | Shot 15: EF4 test shot.
|
| Aug 27 1996 03:27:58:300PM | 960827016 | Joseph Snipes | Shot 16: EF4 test shot.
|
| Aug 27 1996 03:42:18:880PM | 960827017 | Joseph Snipes | Shot 17:EF4 test shot
|
| Aug 27 1996 04:52:09:850PM | 960827018 | Joseph Snipes | Shot 18:Changed gains on EF4 to step down at 0.248 instead of 0.492 so that
the change in gain on the EF2 by EF4 controller at 0.248 does not fight EF4 so much. Dud! |
| Aug 27 1996 04:52:31:710PM | 960827019 | Joseph Snipes | Shot 19:Moved Ar puff to 0.3 - 0.344 sec. Previously, it started at
0.35 sec. Changed EF4 current to -1390 A and Br offset to 5 mT. It appears that the coils became cold during the wait and the fields changed. Fizzle! |
| Aug 27 1996 05:46:32:520PM | 960827020 | Joseph Snipes | Shot 20:Changed EF4 current to -1375 A and Br offset to 6.5 mT. Got plasma.
Disrupted at 0.9 sec. EF4 fuses blown again. Problems start during RF pulse at the H-mode. H-mode from about 0.62 to 0.72 sec. Wolfe proposes that the EF4 problems might be caused by RF pickup in the power room from reflected power down the open transmission line to transmitter 1. |
| Aug 28 1996 07:33:36:990AM | 960827020 | Steve Wolfe | Run Plan for 960828
====================== MP 159 RF conditioning MP 133 Post-boronization fiducials (piggyback) and possibly: MP 156A 1.5MA development MP 161 Low triangularity SL: Takase PO: Wolfe EO: Silva and Daigle Engineering setup ------------------- ECDC Overnight in Helium ower systems setup as for 960827020; note: hybrid control on TF. Gas setup = standard A-side 20psi D2 B-top 5psi D2 B-side Lower 4psi Ar Enable all for first shot (hybrid) |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 07:27:28:440AM | Test | Ok | scanner test |
| 2 | 09:13:11:850AM | Test | Ok | oh 1, oh2u-l test |
| 3 | 09:29:10:730AM | Test | Ok | plasma, 0930 start/ no faults |
| 4 | 09:48:22:880AM | Test | Ok | no faults |
| 5 | 10:05:51:150AM | Plasma | Ok | no faults |
| 6 | 10:16:36:310AM | Plasma | Ok | no faults |
| 7 | 10:26:07:150AM | Plasma | Ok | comm. fault oh2u-l/comm fault ef1u-l |
| 8 | 10:39:36:170AM | Plasma | Ok | |
| 9 | 10:51:23:870AM | Plasma | Ok | |
| 10 | 11:08:45:570AM | Plasma | Ok | |
| 11 | 11:23:53:430AM | Plasma | Ok | |
| 12 | 11:35:41:820AM | Plasma | Ok | |
| 13 | 11:46:12:640AM | Plasma | Ok | |
| 14 | 11:55:13:240AM | Plasma | Bad | ef4 fault |
| 15 | 03:06:16:000PM | Test | Ok | |
| 16 | 03:24:44:730PM | Test | Ok | |
| 17 | 03:40:19:870PM | Test | Ok | |
| 18 | 03:53:56:050PM | Plasma | Ok | |
| 19 | 04:10:20:330PM | Plasma | Ok | |
| 20 | 04:19:37:070PM | Plasma | Bad | pppp |