| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Unknown |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Parkin,Bill Byford,Gary Dekow |
| Engineering Operator Run Comment |
| Plasma startup and conditioning PO: Marmar EO: Dekow/Byford/Parkin |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:19:583PM |
| Author: Earl Marmar |
| Physop run summary 1031023 Purpose: Plasma startup and conditioning Physics operator: Marmar ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well. Run begins at 9:00 and ends at 17:00. Power systems the same as on 1031022004 including control coil settings. 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) Ninja should be left with its current 200 Torr fill. Enable the following gate valves: ECE, VUV, DNB ----------------------------------------------------------------------- RF Setup: Transmitters 1,2,3, and 4 in RUN ON by 8:00 am ----------------------------------------------------------------------- Run Plan: Continue running cleanup plasmas while monitoring H/D, etc. RF Group will continue antenna conditioning. ----------------------------------------------------------------------- Results: The run went pretty well, with 16 full length plasmas in a row after a data system hang took out shot 1. At the end of the run, we had 3 duds and a fizzle interspersed with 3 plasmas. The last shot (24) disrupted 10 msec after the chopper tripped out with failed components. That ended the run early, at about 3:30 pm. The duds are a mystery to me; the fields and fill pressures looked fine. The sparker, to my eye, looks the same as on plasmas, for t<0. RF made significant progress today, with J-port launching substantial energy, H-modes on most shots, and total RF power over 4 MW at various times. H/D was still mostly above 10%. Twice we discharge cleaned for 15 minutes (before shots 13 and 24).In each case H/D dropped, but not dramatically, especially for the high power RF portions of the discharges. The gate valves were kept closed for up to 8 minutes after many shots, for Bruce to look at wall loading/unloading. He reports that 100 T-l of gas was released after the 1 MA disruption due to the chopper trip. All shots today were lower single-null, with Ip from 0.8 to 1.0 MA, and nl_04 in the range from 7e19 to 1e20 (L-Mode). Summary Plasmas: 2-17, 19, 22, 24 (19 total) Fizzle: 21 Duds: 18,20,23 Test/no power: 1 Total cycles: 24 |
| Session Leader Comments |
| Physics Operator Comments | |||
| Oct 23 2003 08:57:17:100AM | Earl Marmar | Purpose: Plasma startup and conditioning Physics operator: Marmar Engineering operator: Gary Dekow ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well. Run begins at 9:00 and ends at 17:00. Power systems the same as on 1031022004 including control coil settings. 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) Ninja should be left with its current 200 Torr fill. Enable the following gate valves: ECE, VUV, DNB ----------------------------------------------------------------------- RF Setup: Transmitters 1,2,3, and 4 in RUN ON by 8:00 am ----------------------------------------------------------------------- Run Plan: Continue running cleanup plasmas while monitoring H/D, etc. RF Group will continue antenna conditioning. ------------------------------------------------------------------------------- | |
| Oct 23 2003 05:54:07:540PM | Earl Marmar | Physop run summary 1031023 Purpose: Plasma startup and conditioning Physics operator: Marmar ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well. Run begins at 9:00 and ends at 17:00. Power systems the same as on 1031022004 including control coil settings. 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) Ninja should be left with its current 200 Torr fill. Enable the following gate valves: ECE, VUV, DNB ----------------------------------------------------------------------- RF Setup: Transmitters 1,2,3, and 4 in RUN ON by 8:00 am ----------------------------------------------------------------------- Run Plan: Continue running cleanup plasmas while monitoring H/D, etc. RF Group will continue antenna conditioning. ----------------------------------------------------------------------- Results: The run went pretty well, with 16 full length plasmas in a row after a data system hang took out shot 1. At the end of the run, we had 3 duds and a fizzle interspersed with 3 plasmas. The last shot (24) disrupted 10 msec after the chopper tripped out with failed components. That ended the run early, at about 3:30 pm. The duds are a mystery to me; the fields and fill pressures looked fine. The sparker, to my eye, looks the same as on plasmas, for t<0. RF made significant progress today, with J-port launching substantial energy, H-modes on most shots, and total RF power over 4 MW at various times. H/D was still mostly above 10%. Twice we discharge cleaned for 15 minutes (before shots 13 and 24).In each case H/D dropped, but not dramatically, especially for the high power RF portions of the discharges. The gate valves were kept closed for up to 8 minutes after many shots, for Bruce to look at wall loading/unloading. He reports that 100 T-l of gas was released after the 1 MA disruption due to the chopper trip. All shots today were lower single-null, with Ip from 0.8 to 1.0 MA, and nl_04 in the range from 7e19 to 1e20 (L-Mode). Summary Plasmas: 2-17, 19, 22, 24 (19 total) Fizzle: 21 Duds: 18,20,23 Test/no power: 1 Total cycles: 24 | |
| Oct 23 2003 09:14:11:223AM | 1031023001 | Earl Marmar | load from 1031022010, 0.8 MA lower single null, 0.8e20 nl_04 no power shot; iogr problem |
| Oct 23 2003 09:36:39:427AM | 1031023002 | Earl Marmar | try again plasma 2 H-Mode periods H/(H+D) = .05 to .10 |
| Oct 23 2003 09:52:21:597AM | 1031023003 | Earl Marmar | no pcs changes plasma; 1 H-mode H/(H+D) = .07 to .11 |
| Oct 23 2003 10:11:42:873AM | 1031023004 | Earl Marmar | no pcs changes plasma; 2 short H-modes H/(H+D) = .09 to .13 |
| Oct 23 2003 10:33:37:160AM | 1031023006 | Earl Marmar | add 800 A to A-coil demand (now 3800) Ip demand to 850 kA (from 800) nl_04 to 7e19 (from 6e19) after the shot, gate valves will be closed for 8 minutes (blip experiment) plasma; 1 H-mode H/(H+D) = .1 to .14 |
| Oct 23 2003 10:59:16:647AM | 1031023007 | Earl Marmar | add 800 A to A-coil demand (now 4600) I_p demand to 900 kA nl_04 to 8e19 plasma; no H-mode; much less RF power H/(H+D) = .1 to .12 Did not get increase in A-coil current; PLC limit |
| Oct 23 2003 11:11:26:060AM | 1031023008 | Earl Marmar | no pcs changes plasma; 2 H-mode periods got more current on A-coils this time H/(H+D) = .1 to .13 |
| Oct 23 2003 11:26:45:387AM | 1031023009 | Earl Marmar | no pcs changes plasma; 1 short H-mode, while RF reaches 4MW total startup starting to look a little off: second peak on H-alpha and CII (seen on shot 8 also) H/(H+D) = .10 to .13 |
| Oct 23 2003 11:42:48:103AM | 1031023010 | Earl Marmar | no pcs changes plasma; no h-mode H/(H+D) = .09 to .13 |
| Oct 23 2003 11:59:26:583AM | 1031023011 | Earl Marmar | no pcs changes plasma; 1 H-mode period something fell in at .125 seconds, took a bite out of I_p H/(H+D) = .1 to .13 |
| Oct 23 2003 12:14:38:917PM | 1031023012 | Earl Marmar | tweak I_p gain at 0.6 seconds speed I_p rampdown slightly plasma; 1 short H-mode period H/(H+D) = .08 to .13 ECDC for 15 minutes before the next shot (D_2, 2e-4 torr guage) |
| Oct 23 2003 12:45:14:133PM | 1031023013 | Earl Marmar | 15 minutes ECDC before this shot (D_2, 2e-4 torr guage) no pcs changes plasma; 3 H-mode periods H/(H+D) = .06 to .12 |
| Oct 23 2003 12:57:50:180PM | 1031023014 | Earl Marmar | no pcs changes plasma; 1 H-mode period H/(H+D) = .08 to .12 |
| Oct 23 2003 01:16:32:620PM | 1031023015 | Earl Marmar | reduce nl_04 demand to 7e19 (from 8e19) plasma; 2 H-mode periods H/(H+D) = .1 to .14 |
| Oct 23 2003 01:27:06:870PM | 1031023016 | Earl Marmar | no pcs changes plasma; 2 H-mode periods H/(H+D) = .1 to .13 |
| Oct 23 2003 01:38:58:930PM | 1031023017 | Earl Marmar | Decrease TF current to 147 kA (from 150) after 0.1 s plasma; 2 H-mode periods H/(H+D) = .1 to .135 |
| Oct 23 2003 01:57:34:790PM | 1031023018 | Earl Marmar | I_p demand to 1.0 MA dud fields look ok |
| Oct 23 2003 02:11:25:260PM | 1031023019 | Earl Marmar | add 2 msec to prepuff plasma; a couple of H-mode periods H/(H+D) = .1 to .14 |
| Oct 23 2003 02:18:55:070PM | 1031023020 | Earl Marmar | no pcs changes dud fields still look ok |
| Oct 23 2003 02:34:29:493PM | 1031023021 | Earl Marmar | add 1 msec to prefill puff fizzle |
| Oct 23 2003 02:54:38:197PM | 1031023022 | Earl Marmar | EF4 10 A more negative plasma; 3 H-mode periods H/(H+D) = .1 to .15 |
| Oct 23 2003 03:03:20:463PM | 1031023023 | Earl Marmar | no pcs changes dud fields look fine 15 minutes of ECDC before the next shot (D_2, 2e-4 torr guage) |
| Oct 23 2003 03:53:24:540PM | 1031023024 | Earl Marmar | ecdc for 15 minutes before the shot (D_2, 2e-4 Torr guage) plasma disrupt at .99 seconds; looks like the chopper suddenly turned off about 10 msec prior to disruption H/(H+D) = .07 to .09 on further investigation, components on the chopper have clearly gone bad. This is the last shot of the run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:48:150AM | Test | Bad | |
| 2 | 09:27:58:437AM | Plasma | Ok | |
| 3 | 09:41:48:680AM | Plasma | Ok | |
| 4 | 09:55:13:113AM | Plasma | Ok | |
| 5 | 10:10:01:310AM | Plasma | Ok | |
| 6 | 10:23:37:150AM | Plasma | Ok | |
| 7 | 10:48:30:543AM | Plasma | Ok | |
| 8 | 11:01:43:930AM | Plasma | Ok | |
| 9 | 11:18:33:083AM | Plasma | Ok | |
| 10 | 11:33:36:563AM | Plasma | Ok | |
| 11 | 11:49:36:043AM | Plasma | Ok | |
| 12 | 12:04:16:273PM | Plasma | Ok | |
| 13 | 12:35:17:650PM | Plasma | Ok | |
| 14 | 12:49:08:180PM | Plasma | Ok | |
| 15 | 01:02:32:980PM | Plasma | Ok | |
| 16 | 01:16:44:540PM | Plasma | Ok | |
| 17 | 01:30:41:807PM | Plasma | Ok | |
| 18 | 01:47:45:980PM | Plasma | Ok | |
| 19 | 02:01:34:603PM | Plasma | Ok | |
| 20 | 02:14:50:637PM | Plasma | Ok | |
| 21 | 02:30:20:853PM | Plasma | Ok | |
| 22 | 02:43:48:057PM | Plasma | Ok | |
| 23 | 02:57:08:027PM | Plasma | Ok | |
| 24 | 03:27:21:493PM | Plasma | Ok | possible EFC problem |