| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch,Lang Lao |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Gary Dekow,Ed Fitzgerald |
| Engineering Operator Run Comment |
| MP#355: ICRF Testing and Conditioning |
| Session Leader Plans |
| Entered: Mar 1 2005 01:44:01:407PM |
| Author: Lang Lao |
| Piggyback MP#407 Error Field Effects on Magnetic Surfaces
PLAN: Apply A-coil with square wave 3 Hz modulation and G-top only 0.8 - 1.5 sec with various amplitudes and document effects on the separatrix location using Thomson plus ECE and other diagnostics if available. A-Coil G-top only, 0.8 - 1.5 sec 3 Hz square wave modulation Amplitudes: 1. 1.5 kA 2. 2.5 kA 3. 3.5 kA If seeing interesting effects, will redo the shots but without RF. |
| Entered: Mar 2 2005 07:19:14:820AM |
| Author: Steve Wukitch |
| Plan: We will continue the simple and dull plasma operation for antenna conditioning . We want to obtain as many discharges as possible to plasma condition D and E antennas and will be the focus of the run. J antenna will be tested at 50 MHz using D(3He) minority. If, however, D and E clean up quickly then we will lower the field to 3.5 T to use D(H) minority. Start with vanilla LSN, 5.4 T, Ip=0.8 MA, nl_04=0.8 target discharge (1050218027). Upper null discharges can be run if parties are interested (1050216013 is a good starting point). The aim is to get 1 MW from each for 0.5 sec then combine and maximize injected power. Monitor density and impurity evolution for trends with RF power. |
| Entered: Mar 2 2005 11:40:55:927AM |
| Author: Lang Lao |
| MP 407
Move A-Coil modulation earlier 0.5 - 1.5 sec. Use TS channel 8, GPC2 ECE channel 5-6 to monitor changes in edge magnetic surfaces. |
| Physics Operators Plans |
| Entered: Mar 1 2005 04:43:36:203PM |
| Author: Earl Marmar |
| MP#355: ICRF Testing and Conditioning SL: Wukitch Piggyback MP#407: Error Field Effects on Magnetic Surfaces SL: Lang Lao PO: Marmar Overnight ECDC in D2, bake at 60C Engineering setup: Power systems as on 1050218027, except A-coil configuration is +G-top only Gas setup: ----------- fill B-Top with 6 psi D2 Hybrid Enabled (PG4) fill B-side lower with 2 psi Ar Hybrid DISabled (PG1) fill B-side upper with 15 psi He3 Hybrid enabled (PG2) fill (former) C-side with 30 psi D2 Hybrid Enabled (PG3) Torvac Setup: -------------- GV1 closed, Bypass to RGA open Torus gate valves closed for 5min after shot Diagnostic gate valves: ECE (assuming no vac problems) open Z-bolo/shutter open |
| Session Leader Summaries |
| Entered: Mar 2 2005 07:01:57:743PM |
| Author: Steve Wukitch |
| Summary: E antenna conditioned to 1.9 MW in L-mode with voltages approaching 40 kV. At 5.4 T, we optimized the plasma to achieve H-mode discharges and obtained short H-modes. J antenna was tested into plasma at 50 MHz and found to operate reasonably well in contrast to previous efforts where FMIT#3 would not operate into plasma. The problem was a transmitter instability that we have traced to the FPA and further tests are required to precisely identify and understand its source. In fact, reducing the frequency to 49.8 MHz, the instability was restricted to 20-60 kW under vacuum loading. After fixing the RF switch in D antenna line, we were unable to transmit significant power to the antenna. We will begin troubleshooting the problem in vacuum conditions tomorrow. |
| Physics Operator Summaries |
| Entered: Mar 2 2005 07:26:11:447PM |
| Author: Earl Marmar |
| The machine ran reasonably well, until the 1 MA disruption on shot 24. After that we got 4 fizzles in a row, and then only 1 plasma, on the last shot (29). Chasing the evolving wall conditions during the day, and especially after disruptions, continues to be a physop challenge.
ICRF got things done, including E-port up to almost 2MW into L-Mode, and J-port operated into plasma at 50 MHz, and showed some heating at 3.4 Tesla. H/(H+D) was around 10% most of the day. The piggyback MP was not run today: there were problems driving a single a-coil, which included overcurrent trip, and power supply oscillation. Observers in the cell saw evidence of coil-case arcing during the tests. Shots 1-3 were a-coil tests. Shot 4 was an EF3 test, required because of some maintenance that had been done on the supply. On the last 2 plasma shots, (24 and 29), which disrupted shortly into rampdown, the a-side camera view (wide 1) shows significant heating of parts of the active mhd antennas; we need to keep our eyes on this. Shot 19 was lost to a data system problem; first we lost updates, including for scopes and the logbook. Then Pat was silent during INIT. This resulted in a no-power cycle, and a short delay. Scorecard: plasmas 16 fizzles 8 tests 4 no power 1 total cycles 29 |
| Session Leader Comments | |||
| Mar 2 2005 11:58:36:723AM | Lang Lao | MP 407. Move A-coil modulation earlier 0.5-1.5 sec. | |
| Mar 2 2005 12:04:14:320PM | Lang Lao | Use TS channel 8, GPC2 ECE channel 5-6 to monitor changes in edge magnetic surfaces. | |
| Mar 2 2005 12:24:02:757PM | Lang Lao | 1050302001 A-coil single G-top test shot had oscillations. Adjust A-coil power supply. | |
| Mar 2 2005 12:19:03:223PM | 1050302001 | Steve Wukitch | 001 A-coil test |
| Mar 2 2005 12:38:33:880PM | 1050302002 | Lang Lao | A-Coil test shot. Had sinusoidal oscillations on top of square wave. GPC2 ECE channels 5-6 had pickups from A-coil. |
| Mar 2 2005 01:11:42:147PM | 1050302004 | Steve Wukitch | 004 EF3 test |
| Mar 2 2005 01:40:28:573PM | 1050302005 | Steve Wukitch | 005 BT~5.4T, Ip~0.8 MA, nl06~0.8 D: 0.4 MW [0.6,1.5]sec E: 0.8 MW [1.,1.5]sec J: 0.4 MW [1.4,1.5] sec result: plasma D: max faults - bad match E: ran 2 faults J: j3 ran/j4 max faults |
| Mar 2 2005 02:12:44:197PM | 1050302006 | Steve Wukitch | 006 BT~5.4T, Ip~0.8 MA, nl06~0.8, 3He puff~100 msec@0.5 sec D: 0.4 MW [0.6,1.5]sec E: 0.8 MW [1.,1.5]sec J: 0.4 MW [1.4,1.5] sec result: plasma D: max faults - bad match E: ran J: j3 ran/j4 max faults |
| Mar 2 2005 02:13:02:057PM | 1050302007 | Steve Wukitch | 007 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec D: 0.4 MW [0.6,1.5]sec E: 1.4 MW [1.,1.5]sec J: 0.4 MW [1.4,1.5] sec result: plasma D: max faults good match E: ran 7 faults J: j3 ran/j4 max faults - bad match |
| Mar 2 2005 02:28:20:570PM | 1050302008 | Steve Wukitch | 008 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec D: 0.4 MW [0.6,1.5]sec E: 1.4 MW [1.,1.5]sec J: 0.4 MW [1.4,1.5] sec result: plasma D: max faults good match E: ran 2 faults J: ran next shot: overlap J |
| Mar 2 2005 02:28:49:230PM | 1050302009 | Steve Wukitch | 009 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec D: 0.4 MW [0.6,1.5]sec E: 1.6 MW [1.,1.5]sec J: 0.4 MW [1.3,1.5] sec result: NTP |
| Mar 2 2005 02:53:32:073PM | 1050302010 | Steve Wukitch | 010 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec D: 0.4 MW [0.6,1.5]sec E: 1.6 MW [1.,1.5]sec J: 0.4 MW [1.3,1.5] sec result: plasma D: max faults good match E: ran 3 faults J: ran - CD phase (co- i think) phase setting is 150 deg |
| Mar 2 2005 03:37:01:120PM | 1050302011 | Steve Wukitch | 011 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec D: 0.2 MW [0.6,1.5]sec E: 1.6 MW [1.,1.5]sec J: 0.4 MW [1.3,1.5] sec result: plasma D: max faults - still have problems E: ran 2 faults J: ran phase - 100 deg - [0,pi,pi,0] |
| Mar 2 2005 04:40:21:620PM | 1050302012 | Steve Wukitch | 012 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec E: 1.6 MW [1.,1.5]sec J: 0.4 MW [1.3,1.5] sec result: plasma E: ran 2 faults J: ran phase - 100 deg - [0,pi,pi,0] |
| Mar 2 2005 03:44:38:323PM | 1050302013 | Steve Wukitch | 013 BT~5.4T, Ip~0.8 MA, nl04~0.8, 3He puff~100 msec@0.5 sec E: 1.6 MW [1.,1.5]sec J: 0.8 MW [1.3,1.5] sec result: plasma D: max faults - still have problems E: ran 2 faults J: ran 1 fault dig. phase - 100 deg - [0,pi,pi,0] next shot: Bt~3.5T |
| Mar 2 2005 03:44:50:917PM | 1050302014 | Steve Wukitch | 014 BT~3.5T, nl04~0.8, D: 0.2 MW [0.6,1.5]sec E: 1.6 MW [1.,1.5]sec J: 0.8 MW [1.3,1.5] sec result: NTP |
| Mar 2 2005 04:08:04:120PM | 1050302015 | Steve Wukitch | 015 BT~3.5T, Ip~0.5 MA, nl04~0.5 E: 0.8 MW [1.2,1.5]sec J: 0.8 MW [0.6,1.2] sec result: plasma E: ran J: ran dig. phase - 100 deg - [0,pi,pi,0] heating |
| Mar 2 2005 04:08:34:337PM | 1050302016 | Steve Wukitch | 016 BT~3.5T, Ip~0.5 MA, nl04~0.5 E: 0.8 MW [1.2,1.5]sec J: 1.6 MW [0.6,1.2] sec result: plasma E: ran no heating J: ran max faults dig. phase - 100 deg - [0,pi,pi,0] |
| Mar 2 2005 04:22:40:667PM | 1050302017 | Steve Wukitch | 017 BT~3.4T, Ip~0.7 MA, nl04~0.5 E: 0.8 MW [1.2,1.5]sec J: 1.6 MW [0.6,1.2] sec result: plasma E: ran no heating J: ran multiple faults at L->H transitions dig. phase - 100 deg - [0,pi,pi,0] |
| Mar 2 2005 04:27:43:167PM | 1050302018 | Steve Wukitch | 018 BT~3.4T, Ip~0.7 MA, nl04~0.5 E: 0.8 MW [1.2,1.5]sec J: 1.6 MW [0.6,1.2] sec result: plasma E: ran no heating J: ran multiple faults dig. phase - 100 deg - [0,pi,pi,0] next shot: back to 5.4 T |
| Mar 2 2005 05:31:53:103PM | 1050302021 | Steve Wukitch | 021 BT~5.4T, Ip~1 MA, nl04~1 E: 1.5 MW [0.6,1.2]sec J: 1.6 MW [1.2,1.5] sec result: plasma - short H-modes E: ran max faults J: ran 8 faults dig. phase - 100 deg - [0,pi,pi,0] |
| Mar 2 2005 05:32:06:587PM | 1050302022 | Steve Wukitch | 022 NTP |
| Mar 2 2005 05:58:20:540PM | 1050302023 | Steve Wukitch | 023 BT~5.4T, Ip~1 MA, nl04~1 E: 1.5 MW [0.6,1.2]sec J: 1.6 MW [1.2,1.5] sec result: plasma - short H-modes E: ran 4 faults J: ran 3 faults dig. phase - 100 deg - [0,pi,pi,0] |
| Mar 2 2005 06:00:09:430PM | 1050302024 | Steve Wukitch | 024 BT~5.4T, Ip~1.2 MA, nl04~1 E: 1.5 MW [0.6,1.2]sec J: 1.6 MW [1.2,1.5] sec result: plasma - early disruption (locked mode) E: ran max faults J: ran max faults |
| Mar 2 2005 06:17:10:150PM | 1050302025 | Steve Wukitch | 025 NTP |
| Mar 2 2005 06:22:57:447PM | 1050302026 | Steve Wukitch | 026 NTP |
| Mar 2 2005 06:34:01:807PM | 1050302027 | Steve Wukitch | 027 NTP |
| Mar 2 2005 07:01:31:260PM | 1050302029 | Steve Wukitch | 029 BT~5.4T, Ip~1.2 MA, nl04~1.2 E: 1.5 MW [0.6,1.2]sec J: 1.6 MW [1.2,1.5] sec result: plasma E: ran max faults J: ran 5 faults |
| Physics Operator Comments | |||
| Mar 2 2005 12:23:49:350PM | 1050302001 | Earl Marmar | First shot will be an a-coil only test, to check the ~3 hz modulation on G-top. To be ready for subsequent plasma shots, load segment 1 from 1050301004, segment 2 from 1050218027, then modify a-coil program to give nearly square modulation with 300 msec period, 25 msec ramps up to 4000 and down to 0. Got faults on the a-coil power supply, and Byford reports at least one spark at the coil case. |
| Mar 2 2005 12:44:24:617PM | 1050302002 | Earl Marmar | reduce a-coil demand to 3000 A, from 4000 A. PLC voltage limit also reduced to 300 V from 600 V. still showing sparks |
| Mar 2 2005 12:45:25:973PM | 1050302003 | Earl Marmar | turn off modulation on a-coil supply is oscillating and coil is still sparking |
| Mar 2 2005 01:03:13:287PM | 1050302004 | Earl Marmar | EF3 only test |
| Mar 2 2005 01:25:56:527PM | 1050302005 | Earl Marmar | try for plasma there will be no a-coils today plasma H/(H+D) ~ 0.07 various flavors of ICRF |
| Mar 2 2005 01:44:32:103PM | 1050302006 | Earl Marmar | reduce prefill puff by 2 msec (to 18 msec) enable Argon puff add 100 msec He3 puff, starting at 0.5 seconds plasma |
| Mar 2 2005 02:03:27:370PM | 1050302007 | Earl Marmar | no pcs changes plasma |
| Mar 2 2005 02:20:20:073PM | 1050302008 | Earl Marmar | reduce prefill puff by 1 msec (to 17 msec) plasma |
| Mar 2 2005 02:27:40:980PM | 1050302009 | Earl Marmar | no pcs changes fizzle |
| Mar 2 2005 02:44:54:230PM | 1050302010 | Earl Marmar | reduce prefill puff 1 msec (to 16 msec) plasma |
| Mar 2 2005 02:58:25:290PM | 1050302011 | Earl Marmar | no pcs changes plasma |
| Mar 2 2005 02:58:48:587PM | 1050302012 | Earl Marmar | reduce prefill puff 1 msec (to 15 msec) |
| Mar 2 2005 03:18:41:167PM | 1050302013 | Earl Marmar | no pcs changes plasma |
| Mar 2 2005 03:40:29:917PM | 1050302014 | Earl Marmar | reduce prefill puff 1 msec (to 14 msec) reduce I_TF to 94 kA (3.4 Tesla), ramping down in segment 2 reduce I_p target to 0.5 MA reduce nl_04 target to 5e19 fizzle |
| Mar 2 2005 03:56:49:510PM | 1050302015 | Earl Marmar | no further pcs changes relative to shot 14 NINJA is now puffing deuterium (shows up nicely on the A-side wide angle view) plasma |
| Mar 2 2005 04:03:21:823PM | 1050302016 | Earl Marmar | Ip to 700 kA nl_04 target to 8e19 plasma disrupt in rampdown (400 kA) |
| Mar 2 2005 04:21:01:743PM | 1050302017 | Earl Marmar | reduce prefill puff by 2 msec to 12 msec reduce Itf to 91kA from 94kA plasma several short h-modes during j-port RF |
| Mar 2 2005 04:31:45:277PM | 1050302018 | Earl Marmar | no pcs changes plasma hesitation during early current ramp multiple short h-modes |
| Mar 2 2005 04:37:10:120PM | 1050302019 | Earl Marmar | Itf to -150kA Ip to 1.00 MA nl_04 to 1e20 no power shot; data system problem |
| Mar 2 2005 04:58:37:777PM | 1050302020 | Earl Marmar | try again no pcs chages fizzle late breakdown |
| Mar 2 2005 05:20:16:900PM | 1050302021 | Earl Marmar | add 3 msec to prefill puff, now 15 msec plasma multiple short h-modes, this time with E-port |
| Mar 2 2005 05:26:34:087PM | 1050302022 | Earl Marmar | reduce prefill puff by 1 msec (now 14 msec) fizzle |
| Mar 2 2005 05:32:33:963PM | 1050302023 | Earl Marmar | no pcs changes |
| Mar 2 2005 07:11:17:307PM | 1050302024 | Earl Marmar | reduce prefill puff by 1 msec (to 13 msec) Ip to 1.2 MA plasma disrupt just after end of flattop probable locked mode starting around 1.15 (sawteeth disappear) active mhd antenna getting hot at the disruption; see wide1 video view from A-side |
| Mar 2 2005 06:11:08:323PM | 1050302025 | Earl Marmar | reduce prefill puff by 2 msec to 11 msec increase nl_04 target to 1.2e20 fizzle |
| Mar 2 2005 07:14:50:730PM | 1050302026 | Earl Marmar | no pcs changes fizzle |
| Mar 2 2005 06:38:47:743PM | 1050302027 | Earl Marmar | add 3 msec to prefill puff (now 14 msec) fizzle late breakdown fill pressure has now gotten quite low |
| Mar 2 2005 07:00:16:120PM | 1050302028 | Earl Marmar | raise prepuff 2 msec (to 16 msec) EF4 10 amp more negative before t=0 fizzle |
| Mar 2 2005 07:11:20:243PM | 1050302029 | Earl Marmar | no pcs changes plasma no obvious locked mode this time, but it disrupted a little later in rampdown several power supplies are at limits near the end of flattop 6 points on each active mhd antenna are getting hot at the disruption; visible on the wide1 video view from A-side |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 12:11:06:427PM | Test | Bad | C.Coil PS Type 1 Flt |
| 2 | 12:26:34:943PM | Test | Bad | G-Top A-coil case arced |
| 3 | 12:38:33:723PM | Test | Bad | G-Top A-coil case arced |
| 4 | 01:05:58:100PM | Test | Ok | EF3 plc test |
| 5 | 01:19:08:100PM | Plasma | Ok | |
| 6 | 01:37:26:230PM | Plasma | Ok | |
| 7 | 01:54:47:570PM | Plasma | Ok | |
| 8 | 02:10:30:980PM | Plasma | Ok | |
| 9 | 02:23:51:430PM | Plasma | Ok | |
| 10 | 02:36:31:463PM | Plasma | Ok | |
| 11 | 02:50:19:103PM | Plasma | Ok | |
| 12 | 03:04:07:837PM | Plasma | Ok | |
| 13 | 03:16:56:790PM | Plasma | Ok | |
| 14 | 03:32:14:743PM | Plasma | Ok | |
| 15 | 03:44:56:480PM | Plasma | Ok | |
| 16 | 03:56:34:087PM | Plasma | Ok | |
| 17 | 04:09:09:120PM | Plasma | Ok | |
| 18 | 04:21:44:540PM | Plasma | Ok | |
| 19 | 04:34:16:290PM | Test | Bad | |
| 20 | 04:52:18:430PM | Plasma | Ok | |
| 21 | 05:11:16:650PM | Plasma | Ok | |
| 22 | 05:24:34:697PM | Plasma | Ok | |
| 23 | 05:37:06:087PM | Plasma | Ok | |
| 24 | 05:51:55:260PM | Plasma | Ok | |
| 25 | 06:05:10:260PM | Plasma | Ok | |
| 26 | 06:18:56:197PM | Plasma | Ok | |
| 27 | 06:31:18:620PM | Plasma | Ok | |
| 28 | 06:43:41:760PM | Plasma | Ok | |
| 29 | 06:56:13:730PM | Plasma | Ok | |