| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Dmitri Mossessian,Steve Wukitch |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| Continued startup, TS calibration by ECE cutoff, ICRF conditioning; SL M |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:17:660PM |
| Author: To Be Determined |
| Physop summary for Thursday, May 1, 2003 Run plan: Continued startup, TS calibration by ECE cutoff, ICRF conditioning. SL Mossessian, Wukitch PO Mossessian 1. TS calibration. Run 4.0 T, density ramp up in L-mode to obtain ECE cutoffs in all ECE channels. 4 shots should be enough, unless we ensounter unexpected problems 2. Return to 5.3 T. Continue ICRF conditioning We'll start with a good discharge from May 1, then drop the field to 4 T, Current of 0.8 MA. Density should ramp from 8e20 to 2e20. We'll return to 5.3 T, nl=.8e20 after TS calibrations are completed. ____________________________________________________ Summary: Good run, although not without problems. Started from shot 1030501006. TCI did not work, so we tutned density feedback off and programed the PG3 to get the required density. It did not work quite right on shot 1, but on shots 2 to 13 we got what we wanted. Using density ramp up and varying Bt between 4 and 3.5 T (see detailed list of shots) we obtained high quality ECE cutoffs for core TS calibrations. Before shot 5 the PO pushed the ready button before the PCS tree finished loading. That caused severe problems with Hybrid. Coldstart had to be done to make things run again. Then there was a problem with a switch in OH2 and some arcing in a power supply. Shots 5,6,7,8 were duds and tests. The second part of the run from shot 15 on was RF conditioning. Shot 1030501006 was loaded, thus returning to 5.4 T and density feedback. After that the startup became less reliable. Shots 15 and 16 had lots of hard x-rays. The startup seemed to improve when shot 1030502014 was loaded (with Bt and Ip changed appropriately). The density feedback was restored for shot 18. The plasma then ran reasonably well with occasional problems in startup. Shot 21 fizzled for no apparent reason - Bz was going up too slow when current already reached 65 kA. Total: 25 shots 20 plasmas 3 duds 1 test 1 fizzle ______________________________________________________ Details ---------------------------------------------------------------------------- 1030502001 mossessian PHYSICS_OPERATOR May 2 2003 10:04:46:580AM . . . . . . . . . . . . . . . . . . . . Load shot 1030501006. Run first shot at 5.3 T. Due to problems with TCI we run without density feedback. Programmed PG3 at 50 to 0.75 s and then ramping down slowly. Turned off nl04 gain and controller. Good shot. Gas puff was mistakenly turned on only at .65 s, so plasma was feeding off the walls for the first half of the discharge. Next shot - extended gas puff to 0. Field to 4 T (TF 111000 A) ---------------------------------------------------------------------------- 1030502002 mossessian PHYSICS_OPERATOR May 2 2003 10:23:36:873AM . . . . . . . . . . . . . . . . . . . . Good shot. Density is nice and constant. Bt=4 T. ECE positions are perfect for calibrations. Next shot - start density ramp. PG3 up to 70 V from the beginning. The ramp starts at .4 goes to 100 V at 2 s. ---------------------------------------------------------------------------- 1030502003 mossessian PHYSICS_OPERATOR May 2 2003 10:37:24:973AM . . . . . . . . . . . . . . . . . . . . Good shot. Nice density ramp. Disrupted @1.29 s - probably density limit. Next shot - go to 1 MA to increase density limit and heat plasma some more. Slow down the ne ramp. ---------------------------------------------------------------------------- 1030502004 mossessian PHYSICS_OPERATOR May 2 2003 10:59:55:350AM . . . . . . . . . . . . . . . . . . . . Good shot. Disrupted @1.48 s - probably density limit. Next shot - try to slow ne ramp some more to avoid disruption. Add step in Bt to 4.5 T @ 1.2 sec ---------------------------------------------------------------------------- 1030502005 mossessian PHYSICS_OPERATOR May 2 2003 11:02:58:840AM . . . . . . . . . . . . . . . . . . . . Hybrid problems. No power shot ---------------------------------------------------------------------------- 1030502007 mossessian PHYSICS_OPERATOR May 2 2003 12:45:11:576PM . . . . . . . . . . . . . . . . . . . . Dud. A switch in OH2 did not work. ---------------------------------------------------------------------------- 1030502008 mossessian PHYSICS_OPERATOR May 2 2003 1:31:32:146PM . . . . . . . . . . . . . . . . . . . . Test ---------------------------------------------------------------------------- 1030502009 mossessian PHYSICS_OPERATOR May 2 2003 1:31:39:286PM . . . . . . . . . . . . . . . . . . . . Good shot Next shot - go to Bt=3.6 T (100 kA TF) and Ip=0.8 MA ---------------------------------------------------------------------------- 1030502010 mossessian PHYSICS_OPERATOR May 2 2003 1:32:25:650PM . . . . . . . . . . . . . . . . . . . . Good shot Next shot - go to 97 kA TF, modify PG3 to increase ne ramp rate slightly ---------------------------------------------------------------------------- 1030502011 mossessian PHYSICS_OPERATOR May 2 2003 1:46:53:356PM . . . . . . . . . . . . . . . . . . . . Good shot Next shot - add step up in Bt to 4 T at 1.1 s ---------------------------------------------------------------------------- 1030502012 mossessian PHYSICS_OPERATOR May 2 2003 1:56:18:996PM . . . . . . . . . . . . . . . . . . . . Good shot Next shot - go back to 4 T, 0.7 MA, constant nl=0.8e20 and fire a pellet ---------------------------------------------------------------------------- 1030502013 mossessian PHYSICS_OPERATOR May 2 2003 2:13:57:913PM . . . . . . . . . . . . . . . . . . . . Good shot. Nice cutoffs from pellet Next shot - go up in current to .85 MA ---------------------------------------------------------------------------- 1030502014 mossessian PHYSICS_OPERATOR May 2 2003 2:50:09:343PM . . . . . . . . . . . . . . . . . . . . Good shot. Large pellet caused disruption Next shot - give session beack to RF. Go to 5.4 T, 0.8 MA. Load shot 1030501006 ---------------------------------------------------------------------------- 1030502015 mossessian PHYSICS_OPERATOR May 2 2003 2:51:02:063PM . . . . . . . . . . . . . . . . . . . . Plasma. Startup is not as good. Plasma bounced and lots of x-rays followed. Next shot - no changes ---------------------------------------------------------------------------- 1030502016 mossessian PHYSICS_OPERATOR May 2 2003 3:14:20:160PM . . . . . . . . . . . . . . . . . . . . Plasma. Same as shot 15 Next shot - load shot 1030502014. Changed Bt to 5.3, Ip to 0.8, left nl off the feedback ---------------------------------------------------------------------------- 1030502017 mossessian PHYSICS_OPERATOR May 2 2003 3:15:09:773PM . . . . . . . . . . . . . . . . . . . . Plasma. Good startup. No bounce, no x-rays Next shot - change nl to TCI feedback ---------------------------------------------------------------------------- 1030502018 mossessian PHYSICS_OPERATOR May 2 2003 3:36:56:963PM . . . . . . . . . . . . . . . . . . . . Plasma. Good startup. Next shot - no changes ---------------------------------------------------------------------------- 1030502019 mossessian PHYSICS_OPERATOR May 2 2003 4:18:52:510PM . . . . . . . . . . . . . . . . . . . . Plasma. Next shot - no changes ---------------------------------------------------------------------------- 1030502020 mossessian PHYSICS_OPERATOR May 2 2003 4:19:03:120PM . . . . . . . . . . . . . . . . . . . . Plasma. Next shot - no changes ---------------------------------------------------------------------------- 1030502021 mossessian PHYSICS_OPERATOR May 2 2003 4:20:12:623PM . . . . . . . . . . . . . . . . . . . . Fizzle. Current rises to 65 kA and suddenly bounces with no apparent reason. Bz is rising slower than on shot 20 starting from .017 s Next shot - no changes ---------------------------------------------------------------------------- 1030502022 mossessian PHYSICS_OPERATOR May 2 2003 4:32:15:703PM . . . . . . . . . . . . . . . . . . . . Plasma. Bounces @ 0.013s but survives Next shot - no changes ---------------------------------------------------------------------------- 1030502023 mossessian PHYSICS_OPERATOR May 2 2003 4:35:46:553PM . . . . . . . . . . . . . . . . . . . . Plasma. Nice startup Next shot - no changes ---------------------------------------------------------------------------- 1030502024 mossessian PHYSICS_OPERATOR May 2 2003 4:50:28:230PM . . . . . . . . . . . . . . . . . . . . Plasma. Nice startup Next shot - no changes |
| Session Leader Comments |
| Physics Operator Comments | |||
| May 2 2003 09:11:36:140AM | Dmitri Mossessian | Run Plan for Thursday, May 1, 2003 Continued startup, TS calibration by ECE cutoff, ICRF conditioning. SL Mossessian, Wukitch PO Mossessian ENGINEERING SETUP ECDC in D2 Overnight prior to run; 60 C Bake Run Starts at 9:00 AM and Ends at 5:00 PM Power Systems as on 1030429024 Gas setup: Fill B-Top with 6 psi of D2 hybrid enabled (PG4) Fill B-side lower with 1 psi Ar Hybrid enabled (PG1) Fill B-side upper with 10 psi D2 Hybrid Disabled (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) ICRF off for the first half of the run - TS calibration Enable the ECE and DNB gate-valves Run plan: 1. TS calibration. Run 4.0 T, density ramp up in L-mode to obtain ECE cutoffs in all ECE channels. 4 shots should be enough, unless we ensounter unexpected problems 2. Return to 5.3 T. Continue ICRF conditioning We'll start with a good discharge from May 1, then drop the field to 4 T, Current of 0.8 MA. Density should ramp from 8e20 to 2e20. We'll return to 5.3 T, nl=.8e20 after TS calibrations are completed. | |
| May 2 2003 10:04:46:580AM | 1030502001 | Dmitri Mossessian | Load shot 1030501006. Run first shot at 5.3 T. Due to problems with TCI we run without density feedback. Programmed PG3 at 50 to 0.75 s and then ramping down slowly. Turned off nl04 gain and controller. Good shot. Gas puff was mistakenly turned on only at .65 s, so plasma was feeding off the walls for the first half of the discharge. Next shot - extended gas puff to 0. Field to 4 T (TF 111000 A) |
| May 2 2003 10:23:36:873AM | 1030502002 | Dmitri Mossessian | Good shot. Density is nice and constant. Bt=4 T. ECE positions are perfect for calibrations. Next shot - start density ramp. PG3 up to 70 V from the beginning. The ramp starts at .4 goes to 100 V at 2 s. |
| May 2 2003 10:37:24:973AM | 1030502003 | Dmitri Mossessian | Good shot. Nice density ramp. Disrupted @1.29 s - probably density limit. Next shot - go to 1 MA to increase density limit and heat plasma some more. Slow down the ne ramp. |
| May 2 2003 10:59:55:350AM | 1030502004 | Dmitri Mossessian | Good shot. Disrupted @1.48 s - probably density limit. Next shot - try to slow ne ramp some more to avoid disruption. Add step in Bt to 4.5 T @ 1.2 sec |
| May 2 2003 11:02:58:840AM | 1030502005 | Dmitri Mossessian | Hybrid problems. No power shot |
| May 2 2003 12:45:11:577PM | 1030502007 | Dmitri Mossessian | Dud. A switch in OH2 did not work. |
| May 2 2003 01:31:32:147PM | 1030502008 | Dmitri Mossessian | Test |
| May 2 2003 01:31:39:287PM | 1030502009 | Dmitri Mossessian | Good shot Next shot - go to Bt=3.6 T (100 kA TF) and Ip=0.8 MA |
| May 2 2003 01:32:25:650PM | 1030502010 | Dmitri Mossessian | Good shot Next shot - go to 97 kA TF, modify PG3 to increase ne ramp rate slightly |
| May 2 2003 01:46:53:357PM | 1030502011 | Dmitri Mossessian | Good shot Next shot - add step up in Bt to 4 T at 1.1 s |
| May 2 2003 01:56:18:997PM | 1030502012 | Dmitri Mossessian | Good shot Next shot - go back to 4 T, 0.7 MA, constant nl=0.8e20 and fire a pellet |
| May 2 2003 02:13:57:913PM | 1030502013 | Dmitri Mossessian | Good shot. Nice cutoffs from pellet Next shot - go up in current to .85 MA |
| May 2 2003 02:50:09:343PM | 1030502014 | Dmitri Mossessian | Good shot. Large pellet caused disruption Next shot - give session beack to RF. Go to 5.4 T, 0.8 MA. Load shot 1030501006 |
| May 2 2003 02:51:02:063PM | 1030502015 | Dmitri Mossessian | Plasma. Startup is not as good. Plasma bounced and lots of x-rays followed. Next shot - no changes |
| May 2 2003 03:14:20:160PM | 1030502016 | Dmitri Mossessian | Plasma. Same as shot 15 Next shot - load shot 1030502014. Changed Bt to 5.3, Ip to 0.8, left nl off the feedback |
| May 2 2003 03:15:09:773PM | 1030502017 | Dmitri Mossessian | Plasma. Good startup. No bounce, no x-rays Next shot - change nl to TCI feedback |
| May 2 2003 03:36:56:963PM | 1030502018 | Dmitri Mossessian | Plasma. Good startup. Next shot - no changes |
| May 2 2003 04:18:52:510PM | 1030502019 | Dmitri Mossessian | Plasma. Next shot - no changes |
| May 2 2003 04:19:03:120PM | 1030502020 | Dmitri Mossessian | Plasma. Next shot - no changes |
| May 2 2003 04:20:12:623PM | 1030502021 | Dmitri Mossessian | Fizzle. Current rises to 65 kA and suddenly bounces with no apparent reason. Bz is rising slower than on shot 20 starting from .017 s Next shot - no changes |
| May 2 2003 04:32:15:703PM | 1030502022 | Dmitri Mossessian | Plasma. Bounces @ 0.013s but survives Next shot - no changes |
| May 2 2003 04:35:46:553PM | 1030502023 | Dmitri Mossessian | Plasma. Nice startup Next shot - no changes |
| May 2 2003 04:50:28:230PM | 1030502024 | Dmitri Mossessian | Plasma. Nice startup Next shot - no changes |
| May 2 2003 05:01:29:997PM | 1030502025 | Dmitri Mossessian | Plasma. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:29:01:727AM | Plasma | Ok | |
| 2 | 10:06:48:427AM | Plasma | Ok | |
| 3 | 10:24:36:720AM | Plasma | Ok | |
| 4 | 10:39:51:337AM | Plasma | Ok | |
| 5 | 11:00:42:947AM | Plasma | Ok | |
| 6 | 11:23:01:073AM | Plasma | Ok | |
| 7 | 11:46:44:517AM | Plasma | Bad | No OH2U & L Current |
| 8 | 12:48:21:160PM | Test | Ok | OH Commutation Test |
| 9 | 01:02:24:790PM | Test | Ok | |
| 10 | 01:19:00:020PM | Plasma | Ok | |
| 11 | 01:33:25:633PM | Plasma | Ok | |
| 12 | 01:49:13:063PM | Plasma | Ok | |
| 13 | 02:03:49:400PM | Plasma | Ok | |
| 14 | 02:18:11:200PM | Plasma | Ok | |
| 15 | 02:37:35:963PM | Plasma | Ok | |
| 16 | 02:57:01:713PM | Plasma | Ok | |
| 17 | 03:10:17:327PM | Plasma | Ok | |
| 18 | 03:23:30:427PM | Plasma | Ok | |
| 19 | 03:39:05:717PM | Plasma | Ok | |
| 20 | 03:51:54:877PM | Plasma | Ok | |
| 21 | 04:04:42:503PM | Plasma | Ok | |
| 22 | 04:18:24:027PM | Plasma | Ok | |
| 23 | 04:32:34:330PM | Plasma | Ok | |
| 24 | 04:46:12:270PM | Plasma | Ok | |
| 25 | 04:59:06:010PM | Plasma | Ok | |