| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | P. Phillips |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Ed Fitzgerald,Gary Dekow |
| Engineering Operator Run Comment |
| MP# 404A TAE Dampening with ICRF EO Pierson PO Marmar SL Snipes |
| Session Leader Plans |
| Entered: Apr 18 2006 05:14:12:507PM |
| Author: Joseph Snipes |
| Run Plan for MP#404a TAE Damping with ICRF Begin with 1060309020 inner wall limited moderate elongation plasmas with nl04 = 9 x 10^19 m^-2, Ip = 0.8 MA, and BT = 5.4 T. Reduce nl04 to 7 x 10^19 m^-2. Sweep the active MHD antennas through the calculated center of the gap TAE frequency multiple times throughout the discharge and look for resonances. From shot to shot slowly increase the ICRF power in steps of 0.25 MW from 0.5 to 1.5 s up to 2.5 MW or until unstable TAEs are observed. Measure the TAE damping rate for each ICRF power level. Only D and E ICRF antennas will be required. Phasing of the active MHD antennas will also be changed between shots to compare in phase and out of phase operation as well as with a single antenna alone. Each phase change requires a cell access. |
| Entered: Apr 19 2006 12:33:35:100PM |
| Author: P. Phillips |
| MP443 LTe using BT sweeps
BT=5.2, 0.6MA, 1x10^20 Vary RF power from 200kw to Max avialable with BT ramps before and during. BT ramp 0.08T increase at .8s and ramped back at 1.2 |
| Physics Operators Plans |
| Entered: Apr 19 2006 09:02:09:317AM |
| Author: Earl Marmar |
| Physop Plan and engineering setup for Wednesday, April 19, 2006
MP 443 Temperature scale length measurements using Btor sweeps PO: Marmar SL: P. Phillips This MP will be run if the FRCECE system is working after recent repairs. If not, MP404A, Parametric Dependence of Moderate n Alfven Eigenmode Damping Rates with ICRF, is the backup (SL: Snipes). Recent repairs to the J-port ICRF antenna will also be tested. no overnight ECDC Power systems as on 1060414001 (LSN, 800 kA). A-coil configuration: normal [+Dtop -Dbot -Jtop +Jbot] and enabled. C-coil Start=0.3sec, Invert=2.0sec D, E and J (1-4) ICRF systems in run-on by 8:30 am. Gas Setup: ---------- fill B-top 6psi D2 Hybrid enabled (PG4) fill B-side lower 1 psi Argon Hybrid Disabled (PG1) leave B-side Upper as is, Hybrid Disabled (PG2) fill B-main 40psi D2 Hybrid Enabled (PG3) ------------------------------------------------------------------------------- ICRF Setup: We'll need ICRF starting at 200 kW, increasing shot by shot up to a total of 3 MW, if available. ------------------------------------------------------------------ After establishing that the FRCECE system is working, we will lower the current to 600 kA, and add small TF sweeps. If we switch to MP404A, we will run inner wall limited discharges, with RF powers up to 2.5 MW. |
| Session Leader Summaries |
| Entered: Apr 19 2006 05:10:27:943PM |
| Author: P. Phillips |
| MP443 - we should have completed this MP. Data was very good with sawteeth at very high frequency so they should not be a limit on data analysis. The biggest limitation will be constant conditions during ramp down in RF. RF power from 200kW to 3.5MW covered.
Shot summary 5 - 200kW, 7,8 500kW, 9,10 1MW, 11,18 1.5MW, 19,22 2MW, 23,24 2.5MW, 25, 26 3MW, 28 3.5MW. |
| Physics Operator Summaries |
| Entered: Apr 19 2006 05:29:33:007PM |
| Author: Earl Marmar |
| This was a straightforward run from the physop point of view. The only change to the startup was to tweak the fill pressure prepuff, attempting to chase the base pressure just before a shot, which varies with time between pulses, and after disruptions. It is not clear that this had any effect. Some shots had early runaways.
The sparker was giving smooth current time histories, with about 2 mA just before t=0. Two shots (19 and 21) disrupted early, around the time of crossover, before RF. After lowering the target nl_04 from 8e19 to 7e19, this did not recur. About 2.5 hours were lost during the middle of the run because of an EF3 problem. On shot 12, EF3 did not turn on until after t=+6 seconds. The cause was never definitively determined, and the problem did not recur. Scorecard: plasmas: 22 fizzles: 0 dud (no EF3): 1 tests: 5 total cycles: 28 |
| Session Leader Comments | |||
| Apr 19 2006 10:12:15:863AM | 1060419005 | P. Phillips | Start of MP443: Use Bt ramps to measure LTe. Ramp up Bt (5.2T) 0.08T before RF and then back down during RF. Start at 200MW and then increment by 500kW with 2 shots at each condition. |
| Apr 19 2006 10:24:03:817AM | 1060419006 | P. Phillips | Injection at 0.8s in middle of BT ramp. |
| Apr 19 2006 10:29:10:037AM | 1060419007 | P. Phillips | Good data during ramps. |
| Apr 19 2006 10:39:38:567AM | 1060419008 | P. Phillips | Good data during ramps. Next shot increase power to 1MW |
| Apr 19 2006 10:53:30:537AM | 1060419009 | P. Phillips | RF 1MW, good ramp data, do again. |
| Apr 19 2006 11:21:05:067AM | 1060419010 | P. Phillips | RF 1MW, good ramp data, next shot 1.5MW |
| Apr 19 2006 12:01:03:020PM | 1060419011 | P. Phillips | RF 1.5MW, good ramp data, repeat |
| Apr 19 2006 02:51:33:740PM | 1060419018 | P. Phillips | Good data in ramp, next shot 2MW RF |
| Apr 19 2006 03:03:36:100PM | 1060419019 | P. Phillips | Disruption at .6s no data during ramp. |
| Apr 19 2006 03:20:41:223PM | 1060419020 | P. Phillips | Data OK, RF drop outs near ramp, 2MW |
| Apr 19 2006 03:30:11:960PM | 1060419021 | P. Phillips | Disruption 0.6s no data |
| Apr 19 2006 03:45:01:270PM | 1060419022 | P. Phillips | 2 MW, Good data during ramp, next shot 2.5MW |
| Apr 19 2006 03:57:31:600PM | 1060419023 | P. Phillips | 2.5Mw, Good data in ramp, one drop out at 1s in RF, repeat |
| Apr 19 2006 04:12:12:770PM | 1060419024 | P. Phillips | 2.5Mw, Good data in ramp, density drop in ramp down during RF, next shot 3MW. |
| Apr 19 2006 04:22:37:317PM | 1060419025 | P. Phillips | 3MW, drop outs during RF power, repeat |
| Apr 19 2006 04:33:59:317PM | 1060419026 | P. Phillips | 3MW, very good data in ramps, next shot try 3.5MW. |
| Apr 19 2006 04:49:48:287PM | 1060419027 | P. Phillips | 3.5Mw, drop outs in ramp down during RF, repeat |
| Apr 19 2006 05:01:17:207PM | 1060419028 | P. Phillips | 3.5MW, very good data in ramps, end of run. |
| Physics Operator Comments | |||
| Apr 19 2006 09:14:57:130AM | 1060419001 | Earl Marmar | load from 1060414001
800 kA, 5.4 tesla, nl_04 target 1.0e20 plasma startup looks a bit lumpy early hards |
| Apr 19 2006 09:20:58:380AM | 1060419002 | Earl Marmar | fine tune the nl_04 target (raise it a bit early); still looking for 1e20 in flattop
plasma startup looks better density got to about 1.1e20 neutral pressure much higher than on shot 1 |
| Apr 19 2006 09:34:12:787AM | 1060419003 | Earl Marmar | nl_04 target to 0.9e20
plasma got nl_04 = 1.0e20 before the h-mode |
| Apr 19 2006 09:49:34:600AM | 1060419004 | Earl Marmar | enable argon puff: 50 msec, starting at 0.3 s
plasma nl_04 got to 0.9e20 before the h-mode |
| Apr 19 2006 10:10:21:363AM | 1060419005 | Earl Marmar | segment 2 Bt to -144400kA with ramp to -146700 in the middle of the shot
Ip to 600kA nl_04 target to .8e20 plasma |
| Apr 19 2006 10:16:18:990AM | 1060419006 | Earl Marmar | no pcs changes
plasma |
| Apr 19 2006 10:36:23:270AM | 1060419007 | Earl Marmar | no pcs changes
plasma |
| Apr 19 2006 10:50:22:053AM | 1060419008 | Earl Marmar | no pcs changes
plasma some camac errors during store no H/D, neutrons |
| Apr 19 2006 11:09:41:880AM | 1060419009 | Earl Marmar | no pcs changes
plasma disrupted during ramp-down still having camac problems |
| Apr 19 2006 11:24:39:067AM | 1060419010 | Earl Marmar | TF invert time to 1.6 seconds (from 2.8 s)
plasma |
| Apr 19 2006 12:27:48:583PM | 1060419011 | Earl Marmar | no pcs changes
delay before the shot (camac problem fixed; TF thermocouple problem fixed) plasma some hards |
| Apr 19 2006 12:28:26:397PM | 1060419012 | Earl Marmar | no pcs changes
power supply dud (no EF3) |
| Apr 19 2006 12:41:40:787PM | 1060419013 | Earl Marmar | add 2 msec to prefill puff (now 22 msec) |
| Apr 19 2006 01:45:20:100PM | 1060419013 | Earl Marmar | no power test |
| Apr 19 2006 02:01:03:380PM | 1060419014 | Earl Marmar | no power test |
| Apr 19 2006 02:12:05:897PM | 1060419015 | Earl Marmar | no power test |
| Apr 19 2006 02:42:57:787PM | 1060419016 | Earl Marmar | no power test |
| Apr 19 2006 02:43:32:630PM | 1060419017 | Earl Marmar | plc EF3 only test |
| Apr 19 2006 02:52:00:427PM | 1060419018 | Earl Marmar | try for plasma
prefill puff now 22 msec (up from 20 on shot 11) plasma |
| Apr 19 2006 03:05:55:957PM | 1060419019 | Earl Marmar | prefill puff back to 20 msec (from 22)
plasma early disruption (0.60 seconds); injection? |
| Apr 19 2006 03:22:29:850PM | 1060419020 | Earl Marmar | no pcs changes
plasma early hards |
| Apr 19 2006 03:36:41:643PM | 1060419021 | Earl Marmar | no pcs changes
plasma another early disruption (0.6 s) density is rising from 0.3 reaching 1e20 before the disruption |
| Apr 19 2006 03:44:56:083PM | 1060419022 | Earl Marmar | lower nl_04 target to 7e19
plasma |
| Apr 19 2006 04:05:10:550PM | 1060419023 | Earl Marmar | no pcs changes
plasma |
| Apr 19 2006 04:15:54:863PM | 1060419024 | Earl Marmar | no pcs changes
plasma |
| Apr 19 2006 04:24:13:473PM | 1060419025 | Earl Marmar | no pcs changes
plasma |
| Apr 19 2006 04:37:40:113PM | 1060419026 | Earl Marmar | no pcs changes
plasma early hards steady h-mode, 3 MW RF |
| Apr 19 2006 04:49:09:037PM | 1060419027 | Earl Marmar | no pcs changes
plasma |
| Apr 19 2006 05:02:28:700PM | 1060419028 | Earl Marmar | no pcs changes
plasma steady h-mode, 3.6 MW ICRF |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:31:067AM | Plasma | Ok | |
| 2 | 09:15:01:583AM | Plasma | Ok | |
| 3 | 09:27:30:240AM | Plasma | Ok | |
| 4 | 09:40:27:660AM | Plasma | Ok | |
| 5 | 09:59:01:363AM | Plasma | Ok | |
| 6 | 10:11:30:427AM | Plasma | Ok | |
| 7 | 10:23:56:753AM | Plasma | Ok | |
| 8 | 10:36:15:473AM | Plasma | Ok | |
| 9 | 10:49:47:910AM | Plasma | Ok | |
| 10 | 11:15:11:787AM | Plasma | Ok | |
| 11 | 11:57:41:147AM | Plasma | Ok | |
| 12 | 12:17:12:740PM | Plasma | Bad | EF3 ower Supply Flt |
| 13 | 01:39:38:490PM | Test | Bad | No Camac Initiate Pulse |
| 14 | 01:51:29:927PM | Test | Ok | EF3 Test |
| 15 | 02:08:17:100PM | Test | Ok | EF3 Test |
| 16 | 02:26:56:630PM | Test | Ok | EF3 test |
| 17 | 02:36:54:003PM | Test | Ok | EF3 PLC Test |
| 18 | 02:47:26:160PM | Plasma | Ok | |
| 19 | 02:59:58:067PM | Plasma | Ok | Plasma Disruption followed by OH1 Self Power Circuit Firing |
| 20 | 03:14:44:427PM | Plasma | Ok | |
| 21 | 03:27:11:660PM | Plasma | Ok | Plasma Disruption follwed by a OH1 self powered overvoltage fault |
| 22 | 03:39:31:503PM | Plasma | Ok | |
| 23 | 03:51:57:940PM | Plasma | Ok | |
| 24 | 04:04:32:350PM | Plasma | Ok | |
| 25 | 04:17:08:753PM | Plasma | Ok | |
| 26 | 04:29:35:287PM | Plasma | Ok | |
| 27 | 04:43:56:037PM | Plasma | Ok | |
| 28 | 04:56:26:410PM | Plasma | Ok | |