| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Dmitri Mossessian |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| MP 271 Pedestal Scaling PO: Marmar SL: Mossesian EO: Dekow/Cochran |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:24:587PM |
| Author: To Be Determined |
| Run summary for 1000629 - MP271 Pedestal scalings Plan: The intention is to complete part 1 of the MP271 - plasma current and input power scans at const n_e. We have two current points at nl_04=0.9e20: 0.8 MA and 1.0 MA. We need to do 1.2 MA, 1.4 MA(or 1.3) and preferably 0.6 MA. The plan: 1. Start with 1000616013 - 1MA, but lower nl04 target to 0.9e20 (to be consistent with previous scans), Bt=5.3 T (~2 shots) 2. Go to 1.2 MA, same Bt, ne. Same RF waveform. Repeat with second RF levels of 1.5, 1, and 0.5 MW (~6 shots) 3. Go to 1.4 MA, repeat RF scan (~8 shots) 4. Go back to 0.6 MA, repeat RF scan (~8 shots) 5. Time permitting, set Ip=1 MA, RF=2.5MW, do density scan with nl04 varying from 0.5e20 to 2e20 shot to shot Summary: We got some data, but it was not a very successful run. We started at 1MA an obtained some good data points at various power levels, although RF was not very reliable. The pedestal gradient was observed to increase with input power, in agreement with previous observations. At 1.2 MA, nl04=0.9e20 RF was unreliable, but some usable data was obtained. The target density was increased to 1.1e20. This did not improve things much. H-mode at 2 power levels were obtained after numerous attempts. At a first glance, pedestal is not dramatically sharper or higher in ELM-free, but further analysis is necessary. Not having much success with current scan, we tried to do density scan at 0.8MA. Steady state EDA was obtained at target nl04=1.1 but attempt to go to 1.3e20 failed. Shots that could potentially provide some data: ---------------------------------------------------------------------------- 1000629003 mossessian SESSION_LEADER Jun 29 2000 10:57:17:670AM . . . . . . . . . . . . . . . . . . . . Good 1MA shot. 2 H-modes at 2.9MW and 1.7 MW. D_alpha looks strange in the second H-mode. We'll have another one at 1MA and then go to 1.2 MA ----------------------------------------------------------------------------- 1000629005 mossessian SESSION_LEADER Jun 29 2000 11:02:45:183AM . . . . . . . . . . . . . . . . . . . . RF has trips at 3MW, but 1.6MW portion is steady state EDA Go to 1.2 MA ----------------------------------------------------------------------------- 1000629013 mossessian SESSION_LEADER Jun 29 2000 1:36:47:936PM . . . . . . . . . . . . . . . . . . . . Several EDA/ELM-free H-modes at various RF levels. RF trips a lot. Try again with 3/1.5MW RF pulse. ----------------------------------------------------------------------------- 1000629014 mossessian SESSION_LEADER Jun 29 2000 1:38:57:530PM . . . . . . . . . . . . . . . . . . . . Short ELM-free (?) H-mode at 2.9MW RF, no H-mode at 1.6 and 0.9MW. RF trips. Try lower power in the first half of RF pulse - do 2.5/2 MW ----------------------------------------------------------------------------- 1000629016 mossessian SESSION_LEADER Jun 29 2000 2:24:31:920PM . . . . . . . . . . . . . . . . . . . . Two short H-modes at 2.6 MW, no L-H transition at 1.5 MW This kind of shots does not give any good data. Try to go to higher density nl04 -> 1.1e20 ----------------------------------------------------------------------------- 1000629017 mossessian SESSION_LEADER Jun 29 2000 3:31:24:796PM . . . . . . . . . . . . . . . . . . . . Multiple H-modes at RF power about 1 MW ----------------------------------------------------------------------------- 1000629019 mossessian SESSION_LEADER Jun 29 2000 3:57:21:936PM . . . . . . . . . . . . . . . . . . . . 2 ELM-free (?) H-modes at 2MW. ----------------------------------------------------------------------------- 1000629020 mossessian SESSION_LEADER Jun 29 2000 4:00:48:000PM . . . . . . . . . . . . . . . . . . . . Very short ELM-free at 2MW Not having much luck with the current scan, we'll attempt to use last 4 shots for density scan at 0.8MA, 2MW ----------------------------------------------------------------------------- 1000629021 mossessian SESSION_LEADER Jun 29 2000 4:54:34:373PM . . . . . . . . . . . . . . . . . . . . Steady state EDA at 1.1e20 m^-2 Go to target of 1.3e20. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:11:550PM |
| Author: To Be Determined |
| #43 of 47 OPS Date: 29-JUN-2000 18:00 Expires: 13-JUL-2000 00:00 From: SPANNA::MARMAR Subj: Physop run summary 1000629 Engineering Setup for 1000629 MP 271 Pedestal scaling. Overnight ECDC in D2, stopping 2 hours before run. Power system setup: Same as for 1000616009 gas setup: B-Top 6 psi D2 Hybrid Enabled B-side lower 1 psi Argon Hybrid Enabled B-side upper leave as is Hybrid DISABLED C-side 30 psi D2 Hybrid Enabled J-bottom leave as is Hybrid DISABLED The following Gate Valves should be ENABLED, assuming no vacuum problems: ECE, VUV DNB gate valve should be DISABLED RF setup: RF programed to go from 0 to 3 MW at 0.7 sec, drop to 2 MW at 1.1 sec and turn off at 1.5 sec. The intention is to complete part 1 of the MP271 - plasma current and input power scans at const n_e. We have two current points at nl_04=0.9e20: 0.8 MA and 1.0 MA. We need to do 1.2 MA, 1.4 MA(or 1.3) and preferably 0.6 MA. SL: Mossessian EO: Dekow PO: Marmar The plan: 1. Start with 1000616013 - 1MA, but lower nl04 target to 0.9e20 (to be consistent with previous scans), Bt=5.3 T (~2 shots) 2. Go to 1.2 MA, same Bt, ne. Same RF waveform. Repeat with second RF levels of 1.5, 1, and 0.5 MW (~6 shots) 3. Go to 1.4 MA, repeat RF scan (~8 shots) 4. Go back to 0.6 MA, repeat RF scan (~8 shots) 5. Time permitting, set Ip=1 MA, RF=2.5MW, do density scan with nl04 varying from 0.5e20 to 2e20 shot to shot Results: We had plasmas at 1.0, 1.2 and 0.8 MW; the session leader reports that 5 of them should be useable toward the mini-proposal. Some problems with fizzles again today, although things settled down after shot 13, with 9 out of the last 10 having successful starts-up. Shot 4 was a dud. Palliative tweaking of fill pressure, EF4 current and B_r offset was employed. Shot 19 had a very interesting EN mode, between 1.27 and 1.3 seconds, with 2 MW RF; the neutron rate went to 3.7e13 per second. This was a 1.2 MA shot. There were no significant engineering or data system problems today. Shot summary 6 Fizzles 1 Dud 17 Plasmas ____________ 24 cycles Shot by shot: ---------------------------------------------------------------------------- coldstart; no errors; all matrices respond. 001: load from 1000616009; reduce nl_04 program to 0.9e20. reduce feedback gain on nl_04 from 9 to 1 between 0.71 and 1.5 seconds; attempt to keep maintenance gas on during H-mode phase (~40 V). fizzle ---------------------------------------------------------------------------- 1000629002 marmar PHYSICS_OPERATOR Jun 29 2000 9:18:42:483AM . . . . . . . . . . . . . . . . . . . . reduce B_R offset by .5 mT reduce EF4 by 10 amps, to -1270 plasma 2 H-modes ----------------------------------------------------------------------------- 1000629003 marmar PHYSICS_OPERATOR Jun 29 2000 9:46:17:450AM . . . . . . . . . . . . . . . . . . . . turn off density feedback between .71 and 1.5 s disable argon plasma 2 H-Modes ----------------------------------------------------------------------------- 1000629004 marmar PHYSICS_OPERATOR Jun 29 2000 10:04:58:403AM . . . . . . . . . . . . . . . . . . . . enable argon dud ----------------------------------------------------------------------------- 1000629005 marmar PHYSICS_OPERATOR Jun 29 2000 10:20:21:873AM . . . . . . . . . . . . . . . . . . . . increase B_R offset .0005 T reduce EF4 10 amp to -1280 plasma ----------------------------------------------------------------------------- 1000629006 marmar PHYSICS_OPERATOR Jun 29 2000 10:46:41:576AM . . . . . . . . . . . . . . . . . . . . program for 1.2 MA add second TF twiddle for ECE profiles at second ICRF power fizzle ----------------------------------------------------------------------------- 1000629007 marmar PHYSICS_OPERATOR Jun 29 2000 11:20:56:403AM . . . . . . . . . . . . . . . . . . . . reduce EF4 10 amp reduce prepuff to 21 msec from 23 plasma disrupt at 0.9 s ----------------------------------------------------------------------------- 1000629008 marmar PHYSICS_OPERATOR Jun 29 2000 11:21:27:793AM . . . . . . . . . . . . . . . . . . . . repeat plasma only got 1/2 of the RF power no H-Mode ----------------------------------------------------------------------------- 1000629009 marmar PHYSICS_OPERATOR Jun 29 2000 12:07:11:466PM . . . . . . . . . . . . . . . . . . . . put nl_04 feedback back on during the middle of the shot reduce programmed rate of rise for nl_04; still have target of 0.9e20 plasma still no D-port; L-mode ----------------------------------------------------------------------------- 1000629010 marmar PHYSICS_OPERATOR Jun 29 2000 12:22:22:230PM . . . . . . . . . . . . . . . . . . . . raise ZCUR 5 mm fizzle ----------------------------------------------------------------------------- 1000629011 marmar PHYSICS_OPERATOR Jun 29 2000 12:37:58:046PM . . . . . . . . . . . . . . . . . . . . reduce B_R offset by .3 mT to 0.0000 reduce EF4 by 10 amps to -1300 reduce prepuff by 2 ms fizzle ----------------------------------------------------------------------------- 1000629012 marmar PHYSICS_OPERATOR Jun 29 2000 12:58:17:250PM . . . . . . . . . . . . . . . . . . . . add 15 amp to EF4 fizzle ----------------------------------------------------------------------------- 1000629013 marmar PHYSICS_OPERATOR Jun 29 2000 1:33:49:843PM . . . . . . . . . . . . . . . . . . . . subtract 10 A from EF4 increase prepuff 1 ms plasma many short H-Modes ----------------------------------------------------------------------------- 1000629014 marmar PHYSICS_OPERATOR Jun 29 2000 1:34:07:013PM . . . . . . . . . . . . . . . . . . . . no PCS changes plasma 1 H-mode ----------------------------------------------------------------------------- 1000629015 marmar PHYSICS_OPERATOR Jun 29 2000 2:01:41:640PM . . . . . . . . . . . . . . . . . . . . increase early nl_04 prog, still target of 0.9e20 plasma disrupt at 0.5 s ----------------------------------------------------------------------------- 1000629016 marmar PHYSICS_OPERATOR Jun 29 2000 2:20:34:326PM . . . . . . . . . . . . . . . . . . . . slow early nl_04 rise target still 0.9e20 plasma 2 short H-modes ----------------------------------------------------------------------------- 1000629017 marmar PHYSICS_OPERATOR Jun 29 2000 2:39:58:950PM . . . . . . . . . . . . . . . . . . . . go to nl_04 target of 1.1e20 plasma 1 MW RF, 6 ELM-free H-modes ----------------------------------------------------------------------------- 1000629018 marmar PHYSICS_OPERATOR Jun 29 2000 3:00:14:873PM . . . . . . . . . . . . . . . . . . . . fizzle ----------------------------------------------------------------------------- 1000629019 marmar PHYSICS_OPERATOR Jun 29 2000 3:24:27:263PM . . . . . . . . . . . . . . . . . . . . lower prepuff 1 ms move RF start to 0.8 s plasma 2 H-Modes at 2 MW ----------------------------------------------------------------------------- 1000629020 marmar PHYSICS_OPERATOR Jun 29 2000 3:43:47:296PM . . . . . . . . . . . . . . . . . . . . move ZCUR down by 5 mm add 0.5 ms to prepuff eliminate second TF wiggle plasma disrupt at 1.37 seconds ----------------------------------------------------------------------------- 1000629021 marmar PHYSICS_OPERATOR Jun 29 2000 4:19:38:043PM . . . . . . . . . . . . . . . . . . . . go to0.8 MA add some derivative gain to density feedback plasma big marfe early nice RF pulse ----------------------------------------------------------------------------- 1000629022 marmar PHYSICS_OPERATOR Jun 29 2000 4:23:13:296PM . . . . . . . . . . . . . . . . . . . . move zcur up 2.5 mm slow the programmed density rise nl_04 target to 1.3e20 plasma little RF power no big marfe ---------------------------------------------------------------------------- 1000629023 marmar PHYSICS_OPERATOR Jun 29 2000 4:50:30:420PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma 2+ MW RF, L-Mode, disrupt at 1.22 s ----------------------------------------------------------------------------- 1000629024 marmar PHYSICS_OPERATOR Jun 29 2000 5:06:41:233PM . . . . . . . . . . . . . . . . . . . . no pcs changes plasma no H-Mode - |
| Session Leader Comments | |||
| Jun 29 2000 10:57:17:670AM | 1000629003 | Dmitri Mossessian | Good 1MA shot. 2 H-modes at 2.9MW and 1.7 MW. D_alpha looks strange in the second H-mode. We'll have another one at 1MA and then go to 1.2 MA |
| Jun 29 2000 11:02:45:183AM | 1000629005 | Dmitri Mossessian | RF has trips at 3MW, but 1.6MW portion is steady state EDA Go to 1.2 MA |
| Jun 29 2000 01:36:47:937PM | 1000629013 | Dmitri Mossessian | Several EDA/ELM-free H-modes at various RF levels. RF trips a lot. Try again with 3/1.5MW RF pulse. |
| Jun 29 2000 01:38:57:530PM | 1000629014 | Dmitri Mossessian | Short ELM-free (?) H-mode at 2.9MW RF, no H-modeat 1.6 and 0.9MW. RF trips. Try lower power in the first half of RF pulse - do 2.5/2 MW |
| Jun 29 2000 02:24:31:920PM | 1000629016 | Dmitri Mossessian | Two short H-modes at 2.6 MW, no L-H transition at 1.5 MW This kind of shots does not give any good data. Try to go to higher density nl04 -> 1.1e20 |
| Jun 29 2000 03:31:24:797PM | 1000629017 | Dmitri Mossessian | Multiple H-modes at RF power about 1 MW |
| Jun 29 2000 03:57:21:937PM | 1000629019 | Dmitri Mossessian | 2 ELM-free (?) H-modes at 2MW. |
| Jun 29 2000 04:00:48:000PM | 1000629020 | Dmitri Mossessian | Very short ELM-free at 2MW Not having much luck with the current scan, we'll attempt to use last 4 shots for density scan at 0.8MA, 2MW |
| Jun 29 2000 04:54:34:373PM | 1000629021 | Dmitri Mossessian | Steady state EDA at 1.1e20 m^-2 Go to target of 1.3e20. |
| Physics Operator Comments | |||
| Jun 29 2000 08:39:31:903AM | Earl Marmar | Engineering Setup for 1000629 MP 271 Pedestal scaling. Overnight ECDC in D2, stopping 2 hours before run. Power system setup: Same as for 1000616009 gas setup: B-Top 6 psi D2 Hybrid Enabled B-side lower 1 psi Argon Hybrid Enabled B-side upper leave as is Hybrid DISABLED C-side 30 psi D2 Hybrid Enabled J-bottom leave as is Hybrid DISABLED The following Gate Valves should be ENABLED, assuming no vacuum problems: ECE, VUV DNB gate valve should be DISABLED RF setup: RF programed to go from 0 to 3 MW at 0.7 sec, drop to 2 MW at 1.1 sec and turn off at 1.5 sec. The intention is to complete part 1 of the MP271 - plasma current and input power scans at const n_e. We have two current points at nl_04=0.9e20: 0.8 MA and 1.0 MA. We need to do 1.2 MA, 1.4 MA(or 1.3) and preferably 0.6 MA. The plan: 1. Start with 1000616013 - 1MA, but lower nl04 target to 0.9e20 (to be consistent with previous scans), Bt=5.3 T (~2 shots) 2. Go to 1.2 MA, same Bt, ne. Same RF waveform. Repeat with second RF levels of 1.5, 1, and 0.5 MW (~6 shots) 3. Go to 1.4 MA, repeat RF scan (~8 shots) 4. Go back to 0.6 MA, repeat RF scan (~8 shots) 5. Time permitting, set Ip=1 MA, RF=2.5MW, do density scan with nl04 varying from 0.5e20 to 2e20 shot to shot | |
| Jun 29 2000 08:42:10:293AM | 1000629001 | Earl Marmar | coldstart; no errors; all matrices respond. load from 1000616009; reduce nl_04 program to 0.9e20. reduce feedback gain on nl_04 from 9 to 1 between 0.71 and 1.5 seconds; attempt to keep maintenance gas on during H-mode phase (~40 V). |
| Jun 29 2000 09:04:24:980AM | 1000629001 | Earl Marmar | fizzle |
| Jun 29 2000 09:18:42:483AM | 1000629002 | Earl Marmar | reduce B_R offset by .5 mT reduce EF4 by 10 amps, to -1270 plasma 2 H-modes |
| Jun 29 2000 09:46:17:450AM | 1000629003 | Earl Marmar | turn off density feedback between .71 and 1.5 s disable argon plasma 2 H-Modes |
| Jun 29 2000 10:04:58:403AM | 1000629004 | Earl Marmar | enable argon dud |
| Jun 29 2000 10:20:21:873AM | 1000629005 | Earl Marmar | increase B_R offset .0005 T reduce EF4 10 amp to -1280 plasma |
| Jun 29 2000 10:46:41:577AM | 1000629006 | Earl Marmar | program for 1.2 MA add second TF twiddle for ECE profiles at second ICRF power fizzle |
| Jun 29 2000 11:20:56:403AM | 1000629007 | Earl Marmar | reduce EF4 10 amp reduce prepuff to 21 msec from 23 plasma disrupt at 0.9 s |
| Jun 29 2000 11:21:27:793AM | 1000629008 | Earl Marmar | repeat plasma only got 1/2 of the RF power no H-Mode |
| Jun 29 2000 12:07:11:467PM | 1000629009 | Earl Marmar | put nl_04 feedback back on during the middle of the shot reduce programmed rate of rise for nl_04; still have target of 0.9e20 plasma still no D-port; L-mode |
| Jun 29 2000 12:22:22:230PM | 1000629010 | Earl Marmar | raise ZCUR 5 mm fizzle |
| Jun 29 2000 12:37:58:047PM | 1000629011 | Earl Marmar | reduce B_R offset by .3 mT to 0.0000 reduce EF4 by 10 amps to -1300 reduce prepuff by 2 ms fizzle |
| Jun 29 2000 12:58:17:250PM | 1000629012 | Earl Marmar | add 15 amp to EF4 fizzle |
| Jun 29 2000 01:33:49:843PM | 1000629013 | Earl Marmar | subtract 10 A from EF4 increase prepuff 1 ms plasma many short H-Modes |
| Jun 29 2000 01:34:07:013PM | 1000629014 | Earl Marmar | no PCS changes plasma 1 H-mode |
| Jun 29 2000 03:03:05:437PM | 1000629015 | Earl Marmar | increase early nl_04 prog, still target of 0.9e20 plasma disrupt at 0.5 s |
| Jun 29 2000 02:20:34:327PM | 1000629016 | Earl Marmar | slow early nl_04 rise target still 0.9e20 plasma 2 short H-modes |
| Jun 29 2000 02:39:58:950PM | 1000629017 | Earl Marmar | go to nl_04 target of 1.1e20 plasma 1 MW RF, 6 ELM-free H-modes |
| Jun 29 2000 03:00:14:873PM | 1000629018 | Earl Marmar | fizzle |
| Jun 29 2000 05:57:56:670PM | 1000629019 | Earl Marmar | lower prepuff 1 ms move RF start to 0.8 s plasma 2 H-Modes at 2 MW interesting EN mode, around 1.3 seconds, triggered by H-->L backtransition; RF stays on at 2 MW; neutron rate goes up to 3.7e13. |
| Jun 29 2000 03:43:47:297PM | 1000629020 | Earl Marmar | move ZCUR down by 5 mm add 0.5 ms to prepuff eliminate second TF wiggle plasma disrupt at 1.37 seconds |
| Jun 29 2000 04:19:38:043PM | 1000629021 | Earl Marmar | go to0.8 MA add some derivative gain to density feedback plasma big marfe early nice RF pulse |
| Jun 29 2000 04:23:13:297PM | 1000629022 | Earl Marmar | move zcur up 2.5 mm slow density rise nl_04 target to 1.3e20 plasma little RF power no big marfe |
| Jun 29 2000 04:50:30:420PM | 1000629023 | Earl Marmar | no pcs changes plasma 2+ MW RF, L-Mode, disrupt at 1.22 s |
| Jun 29 2000 05:06:41:233PM | 1000629024 | Earl Marmar | no pcs changes plasma no H-Mode |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:58:05:840AM | Plasma | Ok | |
| 2 | 09:13:20:280AM | Plasma | Ok | |
| 3 | 09:34:13:827AM | Plasma | Ok | |
| 4 | 09:54:38:373AM | Plasma | Ok | |
| 5 | 10:13:41:013AM | Plasma | Ok | |
| 6 | 10:34:50:437AM | Plasma | Ok | |
| 7 | 10:52:18:357AM | Plasma | Ok | |
| 8 | 11:14:10:403AM | Plasma | Ok | |
| 9 | 11:54:58:903AM | Plasma | Ok | |
| 10 | 12:16:15:843PM | Plasma | Ok | |
| 11 | 12:31:44:200PM | Plasma | Ok | |
| 12 | 12:49:43:547PM | Plasma | Ok | |
| 13 | 01:06:13:797PM | Plasma | Ok | |
| 14 | 01:28:51:903PM | Plasma | Ok | |
| 15 | 01:50:19:827PM | Plasma | Ok | |
| 16 | 02:13:00:547PM | Plasma | Ok | |
| 17 | 02:33:25:857PM | Plasma | Ok | |
| 18 | 02:54:51:357PM | Plasma | Ok | |
| 19 | 03:14:22:450PM | Plasma | Ok | |
| 20 | 03:36:43:263PM | Plasma | Ok | |
| 21 | 03:56:58:200PM | Plasma | Ok | |
| 22 | 04:18:30:920PM | Plasma | Ok | |
| 23 | 04:39:42:967PM | Plasma | Ok | |
| 24 | 05:00:42:700PM | Plasma | Ok | |