| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | John Rice |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Byford,Gary Dekow |
| Engineering Operator Run Comment |
| SL:Rice PO:Marmar EO:Byford/Dekow MP289A Double Barrier |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:27:180PM |
| Author: To Be Determined |
| Session Leader Run Summary for 1010717 MP289A Double Barrier Studies Several double barrier plasmas were formed at 4.5 T using D and E port (4, 6, 7, 10, 16), however J-port only operated above 500 kW on one discharge (17), which was the only plasma with an arrested ITB. This particular plasma also had a TF reramp, so it is ambiguous as to which arrested the barrier. As such, not much headway was made into MP289A except that the barrier could be formed fairly reliably early in the run, before H/D rose above 10%. The run began with several duds, presumably due to J-port conditioning. There was also a string of 3 unexplained duds in the middle of the run. The later shots were plagued by H-L transitions which destroyed the ITB, because of the high H/D ratio. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:13:863PM |
| Author: To Be Determined |
| Run Plan and ENGINEERING SETUP FOR Tuesday 1010717 MP289A Double Barrier SL: Rice PO: Marmar ECDC in D2 overnight, stopping by 8:00 am RUN BEGINS AT 9:00 am AND ENDS AT 5:00 pm Power systems the same as for shot 1010716016 Gas setup: fill B-Top with 6 psi 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) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) fill J-Bottom with 30 psi He Hybrid DISABLED(PG5) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV RF STATUS: XMTR 1 AND 2, RUN-ON STARTED AT 8:00 AM XMTR 3 AND 4, RUN-ON STARTED AT 8:00 AM RUN PLAN: Pick up where we left off on Monday. Try to optimize the off-axis core barrier plasma and then add on-axis heating. Piggybacking by MP281 Edge Turbulence Imaging is expected. Results: The run started with 3 duds (J-port was vacuumed conditioned just before shot 1). After 3 rounds of ECDC, we got a good plasma on shot 4, with a good core barrier. J-port proved difficult to couple reliably, so eventually we went to D+E only, with TF ramps to investigate formation of the core barrier, followed by TF increases to try to arrest the core buildup. See the session leader summary for details. There were several fizzles, and in addition to the duds at the beginning of the day, we had 2 more duds in the middle of the run (shots 12 and 13). The fields and gas all looked pretty good. We had more ECDC, and tweaked the fields a bit, after which there were no more duds for the remainder of the run. H/D was rising on every shot during RF, typically to 0.1 or a little higher. ECDC in D_2 was run before most shots. See the logbook for details. Scorecard: Plasmas 13 Fizzles 3 Duds 5 Tests/no power 0 Total cycles 21 |
| Session Leader Comments | |||
| Jul 17 2001 09:24:32:597AM | 1010717001 | John Rice | canonical post-J-port conditioning dud |
| Jul 17 2001 09:48:29:377AM | 1010717002 | John Rice | non-canonical post-J-port conditioning dud |
| Jul 17 2001 10:28:02:580AM | 1010717003 | John Rice | 2nd non-canonical post-J-port conditioning dud |
| Jul 17 2001 10:47:32:617AM | 1010717004 | John Rice | great ITB formation |
| Jul 17 2001 11:01:37:767AM | 1010717005 | John Rice | fiz |
| Jul 17 2001 11:25:15:750AM | 1010717006 | John Rice | another excellent ITB no J-port |
| Jul 17 2001 11:56:24:810AM | 1010717007 | John Rice | another excellent ITB no J-port |
| Jul 17 2001 12:20:02:357PM | 1010717008 | John Rice | lost ITB at 0.9s no J-port |
| Jul 17 2001 12:27:52:573PM | 1010717009 | John Rice | fiz |
| Jul 17 2001 12:56:50:600PM | 1010717010 | John Rice | excellent ITB 300 kW from J-port |
| Jul 17 2001 01:18:16:233PM | 1010717011 | John Rice | transient ITB no J-port |
| Jul 17 2001 01:18:34:390PM | 1010717012 | John Rice | dudly |
| Jul 17 2001 01:36:26:627PM | 1010717013 | John Rice | dudly |
| Jul 17 2001 02:13:53:933PM | 1010717014 | John Rice | dudly |
| Jul 17 2001 02:19:13:663PM | 1010717015 | John Rice | ITB D-port trip |
| Jul 17 2001 02:44:11:460PM | 1010717016 | John Rice | excellent ITB no J-port |
| Jul 17 2001 03:07:29:647PM | 1010717017 | John Rice | excellent ITB, rotation returned w/ TF reramp and/or 600 kW J-port |
| Jul 17 2001 03:26:45:557PM | 1010717018 | John Rice | ITB, rotation returned w/ TF reramp but went out of H-mode 0 kW J-port |
| Jul 17 2001 04:10:23:533PM | 1010717019 | John Rice | ITB, rotation returned w/ TF reramp but went out of H-mode 0 kW J-port |
| Jul 17 2001 04:38:37:697PM | 1010717020 | John Rice | ITB, rotation returned w/ TF reramp but went out of H-mode 0 kW J-port |
| Jul 17 2001 04:55:28:133PM | 1010717021 | John Rice | ITB but went out of H-mode 0 kW J-port |
| Physics Operator Comments | |||
| Jul 17 2001 08:57:31:670AM | Earl Marmar | Run Plan and ENGINEERING SETUP FOR Tuesday 1010717 MP289A Double Barrier SL: Rice PO: Marmar ECDC in D2 overnight, stopping by 8:00 am RUN BEGINS AT 9:00 am AND ENDS AT 5:00 pm Power systems the same as for shot 1010716016 Gas setup: fill B-Top with 6 psi 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) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) fill J-Bottom with 30 psi He Hybrid DISABLED(PG5) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV RF STATUS: XMTR 1 AND 2, RUN-ON STARTED AT 8:00 AM XMTR 3 AND 4, RUN-ON STARTED AT 8:00 AM RUN PLAN: Pick up where we left off on Monday. Try to optimize the off-axis core barrier plasma and then add on-axis heating. Piggybacking by MP281 Edge Turbulence Imaging is expected. | |
| Jul 17 2001 08:57:58:060AM | Earl Marmar | coldstart all matrices respond no errors | |
| Jul 17 2001 09:01:52:193AM | 1010717001 | Earl Marmar | load from 1010716016 load segment 1 from 1010716007 J-port was conditioning just before the run lower prepuff to 19 msec |
| Jul 17 2001 09:21:10:217AM | 1010717001 | Earl Marmar | dud |
| Jul 17 2001 09:53:06:200AM | 1010717002 | Earl Marmar | ECDC in D_2 for 15 minutes before shot (P_fill = 4e-4) increase prepuff to 22 msec dud |
| Jul 17 2001 10:22:04:427AM | 1010717003 | Earl Marmar | ECDC in D_2 for 15 minutes before shot (P_fill = 4e-4) take 15 amps off EF4 (now -1285) reduce BR_0 offset by .55 mT dud |
| Jul 17 2001 10:53:13:330AM | 1010717004 | Earl Marmar | no ECDC before shot raise BR_0 offset 0.4 mT plasma nice core peaking (central density to 8e20) |
| Jul 17 2001 11:04:52:790AM | 1010717005 | Earl Marmar | ECDC before shot (H/D was rising strongly on Shot 4) no PCS changes fizzle |
| Jul 17 2001 11:43:00:660AM | 1010717006 | Earl Marmar | no ECDC before shot add .4 mT to BR_0 offset remove 1 msec from prepuff plasma |
| Jul 17 2001 12:09:07:507PM | 1010717007 | Earl Marmar | ECDC 6 minutes before shot no PCS changes plasma |
| Jul 17 2001 12:09:37:133PM | 1010717008 | Earl Marmar | ECDC 5 minutes before shot no PCS changes plasma |
| Jul 17 2001 12:32:59:800PM | 1010717009 | Earl Marmar | ECDC 7 minutes before shot no PCS changes fizzle |
| Jul 17 2001 12:55:46:940PM | 1010717010 | Earl Marmar | no ECDC before shot reduce BR_0 offset by 0.5 mT plasma |
| Jul 17 2001 01:13:51:177PM | 1010717011 | Earl Marmar | ECDC in D_2 for 7 minutes before shot reduce prepuff by 1 msec plasma |
| Jul 17 2001 01:22:42:240PM | 1010717012 | Earl Marmar | no ECDC before shot no PCS changes dud; fields & gas look fine |
| Jul 17 2001 01:46:46:303PM | 1010717013 | Earl Marmar | no ECDC before shot dud |
| Jul 17 2001 02:03:23:040PM | 1010717014 | Earl Marmar | ECDC for 11 minutes before shot increase BR_0 offset by 0.5 mT fizzle; late breakdown; B_z looks too high; fill also a tad high |
| Jul 17 2001 02:21:45:683PM | 1010717015 | Earl Marmar | no ECDC before shot EF4 15 A more negative before t=0 plasma |
| Jul 17 2001 02:35:32:693PM | 1010717016 | Earl Marmar | ECDC for 10 minutes before shot (P_fill = 2e-4) no PCS changes plasma |
| Jul 17 2001 03:07:31:240PM | 1010717017 | Earl Marmar | ECDC 10 minutes before shot change TF waveform to ramp back up to 5.3 T, starting at 0.85 s plasma |
| Jul 17 2001 03:36:00:670PM | 1010717018 | Earl Marmar | ECDC for 7 minutes before shot reduce TF re-ramp, going up to 130 kA starting at 0.85 seconds plasma |
| Jul 17 2001 04:15:53:967PM | 1010717019 | Earl Marmar | ECDC 8 minutes before shot DNB will fire at 0.7 to 0.8 s reduce prepuff by 2 msec plasma |
| Jul 17 2001 04:34:32:283PM | 1010717020 | Earl Marmar | ECDC for 9 minutes before shot add 1 msec to prepuff (now 21 msec) plasma |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:16:24:567AM | Plasma | Ok | |
| 2 | 09:46:25:937AM | Plasma | Ok | |
| 3 | 10:15:40:180AM | Plasma | Ok | |
| 4 | 10:34:35:123AM | Plasma | Ok | |
| 5 | 10:56:09:367AM | Plasma | Ok | |
| 6 | 11:16:45:470AM | Plasma | Ok | |
| 7 | 11:38:33:777AM | Plasma | Ok | |
| 8 | 12:04:55:483PM | Plasma | Ok | |
| 9 | 12:26:11:257PM | Plasma | Ok | |
| 10 | 12:38:44:470PM | Plasma | Ok | |
| 11 | 12:59:32:883PM | Plasma | Ok | |
| 12 | 01:15:54:900PM | Plasma | Ok | |
| 13 | 01:29:30:660PM | Plasma | Ok | |
| 14 | 01:54:47:757PM | Plasma | Ok | |
| 15 | 02:10:53:570PM | Plasma | Ok | |
| 16 | 02:33:41:737PM | Plasma | Ok | |
| 17 | 02:55:25:480PM | Plasma | Ok | |
| 18 | 03:16:07:617PM | Plasma | Ok | |
| 19 | 04:05:17:240PM | Plasma | Ok | |
| 20 | 04:29:51:570PM | Plasma | Ok | |
| 21 | 04:51:27:563PM | Plasma | Ok | |