| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Steve Wolfe,Ian Hutchinson |
| Engineering operator(s): | Gary Dekow,Bill Byford |
| Engineering Operator Run Comment |
| MP355 ICRF troubleshooting; SL:Wukitch; PO:Hutch/Wolfe; EO:Dekow/Byford |
| Session Leader Plans |
| Entered: May 4 2006 04:44:59:613PM |
| Author: Steve Wukitch |
| Engineering setup for Friday 05-May-2006
MP ICRF Testing and Conditioning Session leader: Wukitch Physics operator: Hutchison Overnight ECDC in D2, and bake at 60 C. Run expected to begins at 11:00 and ends at 17:00 Begin lock-up at 10:30 (please check with SL for changes) expect a delay to perform testing on J3 and install quarter wave transformers on E Power systems as on 1060421007 (1.0 MA fiducial, 5.4 T, LSN) A-coil configuration: normal [+Dtop -Dbot -Jtop +Jbot] and enabled. Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar + 2 psi Ne Hybrid DISABLED (PG1) fill B-side upper as is, Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 12 psi D2 Enabled Please have He on standby for B-main Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo shutters Important Diagnostics: standard impurity spectroscopy, Mo source monitor, McPherson, emissive probe SL plan: Prior to run: measure J3 spectrum depending on spectrum results - modify FMIT#3 operational point vacuum test with 0.1 T field multipactor discharge clean antenna vacuum test begin plasma ops 1. Standard fidicial discharge to test J performance run J3 and J4 separately maximum power in D 2. switch to He plasmas maximum power in He 3. Current, gap, and Bt scan |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: May 5 2006 05:02:51:780PM |
| Author: Ian Hutchinson |
| Not a bad PO day considering we didn't start till 12:30pm and had a break.
Quite a few disruptions but all were radiative injections and appeared attributable to RF. Scorecard __________
Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result
| 01 1.976 1.017 Plasma | 02 0.936 1.045 Plasma |
| 03 1.975 1.012 Plasma | 04 1.971 1.009 Plasma |
| 05 1.973 1.016 Plasma | 06 1.006 1.042 Plasma |
| 07 1.976 1.013 Plasma | 08 1.134 1.059 Plasma |
| 09 1.975 1.017 Plasma | 10 1.977 1.015 Plasma |
| 11 1.244 0.759 Plasma | 12 1.978 0.744 Plasma |
| 13 0.925 0.740 Plasma
Date 1060505: 13 shots. 13 plasmas. 0 fizzles. 0 duds. 0 System Error.
(Plasma = Ip gt 50.0 kA Dud = H_alpha lt 0.40 V)
Total plasma duration: 21.05 s (exceeding -101 kA)
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| Session Leader Comments | |||
| May 5 2006 12:47:27:787PM | 1060505001 | Steve Wukitch | 001 5.4 T, 1.0 MA, nl 0.75e20 m^-3
D: 0 MW E: 0.5 MW [.7, 1.4] sec. J: 2 MW [.7, 1.4] sec 200 msec each Result: plasma E: no kalmus J: J3 ran mismatch J4 gate locked next: reset J4 and turnon kalmus |
| May 5 2006 12:50:14:753PM | 1060505001 | Steve Wukitch | 002 5.4 T, 1.0 MA, nl 0.75e20 m^-3
D: 0 MW E: 0.5 MW [.7, 1.4] sec. J: 2 MW [.7, 1.4] sec 200 msec each Result: plasma - early disruption E: mismatch J: J3 ran 1 fault - ran better than yesterday J4 briefly ran before disruption next: different RF timing |
| May 5 2006 01:37:17:200PM | 1060505002 | Steve Wukitch | 002 5.4 T, 1.0 MA, nl 0.75e20 m^-3
D: 0 MW E: 0.5 MW [.7, 1.4] sec. J: 2 MW [.7, 1.4] sec 200 msec each Result: plasma - early disruption E: mismatch J: J3 ran 1 fault - ran better than yesterday J4 briefly ran before disruption next: different RF timing |
| May 5 2006 01:41:59:690PM | 1060505003 | Steve Wukitch | 003 5.4 T, 1.0 MA, nl 0.9e20 m^-3
D: 0 MW E: 0.5 MW [.65, 0.8] sec. J: 2 MW [.8, 1.2] sec 100 msec each isolated Result: plasma E: mismatch J: ran - 3 faults 2 MW! |
| May 5 2006 01:42:11:987PM | 1060505004 | Steve Wukitch | 004 5.4 T, 1.0 MA, nl 0.9e20 m^-3
D: 0 MW E: 0.5 MW [.65, 0.8] sec. J: 2 MW [.8, 1.2] sec Result: plasma E: mismatch J: ran - max faults - match off - having problem with tuning program reading data properly |
| May 5 2006 01:42:28:987PM | 1060505005 | Steve Wukitch | 005 5.4 T, 1.0 MA, nl 0.8e20 m^-3
D: 0 MW E: 0.5 MW [.65, 0.8] sec. J: 2 MW [.8, 1.2] sec Result: plasma E: mismatch but why? J: ran - |
| May 5 2006 01:42:43:207PM | 1060505006 | Steve Wukitch | 006 5.4 T, 1.0 MA, nl 0.8e20 m^-3
D: 0 MW E: 0.5 MW [.65, 0.8] sec. J: 2 MW [.8, 1.2] sec Result: plasma - early disruption E: mismatch but why? J: ran - |
| Physics Operator Comments | |||
| May 5 2006 11:43:55:593AM | Steve Wolfe | Setting up for ICRF run Import seg2 from 1060421007 (1MA,7e19,150kA) In seg1, delay start of TF waveform to -1.0. Note: PG4=18ms, Br0=-.0003, IC_EF4=-1350 Load at 5-May-2006 11:43:27.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| May 5 2006 12:32:51:893PM | 1060505001 | Steve Wolfe | Shot#1: plasma, One small early xray burst, several injections. RF practically non-existent. No H-mode. Startup not bad. Next: repeat (after rf power room access) |
| May 5 2006 12:54:50:257PM | 1060505002 | Steve Wolfe | Shot#2: plasma,disrupts at 0.935sec, in H-mode during RF J3 ran at 1MW, J4 just on before killer injection E faulting out. Injection starts at .922 Early injection around 0.13 takes a small bite out of current. next: raise nl04 to 0.9e20 |
| May 5 2006 01:03:32:333PM | 1060505003 | Steve Wolfe | Shot#3: nl04 to 0.9 plasma, hmodes Injection around 0.13 may be associated with current rise mhd J3, J4 both running at 1MW, with overlap. E still otl. H=port side of J antenna lighting up on video view Still getting some early runaway dump. Bz way too negative, so is Br next: raise bz,br |
| May 5 2006 01:14:12:050PM | 1060505004 | Steve Wolfe | Shot#4: ic_ef4 from -1350 to -1335, br0 from -.0003 to 0. plasma, early hards much worse, this one bounced in startup one h-mode, followed by continuous dithers(?) J3+J4 short pulses, then faults out on retries. E still nothing but faults next: raise pg4 to 20msec |
| May 5 2006 01:27:36:050PM | 1060505005 | Steve Wolfe | Shot#5: raise pg4 to 20msec plasma. less runaway but still bouncing. Three h-modes this time. J3&4 ramp to 2.6MW, 2faults. E still faulting next: raise ef4 again |
| May 5 2006 01:42:24:847PM | 1060505006 | Steve Wolfe | Shot#6: raise ic_ef4 -1335 to -1325 Disrupted at ~1sec. Still has a bounce, maybe worse; bz now looks too positive. E still bad, J faults once at 2.4MW, coming back on at disruption Next: EF4 back down to -1335, br0 to -.0002 |
| May 5 2006 02:00:52:787PM | 1060505007 | Steve Wolfe | Shot#7: ic_ef4 -1325 to -1335, br0 from 0 to -.0002 plasma. Startup better, no bounce. No runaways One short h-mode. RF crowbar on J. E has something wrong. J has a control power problem. E trans. line needs to be partially disassembled to check what's wrong. Estimating an hour of down time (I'd guess longer). |
| May 5 2006 04:09:12:380PM | 1060505008 | Ian Hutchinson | Plasma disrupts at 1.12s because of a big brick during RF faulting.
Some initial runaways. No changes. |
| May 5 2006 04:25:55:977PM | 1060505009 | Ian Hutchinson | Plasma to rampdown. |
| May 5 2006 04:33:03:773PM | 1060505010 | Ian Hutchinson | Plasma to rampdown.
Load segment 2 from 1060504001. |
| May 5 2006 04:42:32:130PM | 1060505011 | Ian Hutchinson | Plasma disrupts at 1.23s caused by radiation. |
| May 5 2006 04:59:42:900PM | 1060505012 | Ian Hutchinson | Plasma to rampdown. Decent J-port operation at 2 MW. |
| May 5 2006 05:00:54:963PM | 1060505013 | Ian Hutchinson | Plasma disrupts at 0.92s. Monster injection. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 12:26:52:157PM | Plasma | Ok | |
| 2 | 12:44:34:223PM | Plasma | Ok | |
| 3 | 12:57:32:707PM | Plasma | Ok | |
| 4 | 01:09:55:397PM | Plasma | Ok | |
| 5 | 01:22:32:707PM | Plasma | Ok | |
| 6 | 01:35:56:103PM | Plasma | Ok | |
| 7 | 01:50:02:647PM | Plasma | Ok | |
| 8 | 03:55:01:163PM | Plasma | Ok | |
| 9 | 04:07:44:020PM | Plasma | Ok | |
| 10 | 04:20:10:770PM | Plasma | Ok | |
| 11 | 04:33:04:540PM | Plasma | Ok | |
| 12 | 04:45:24:193PM | Plasma | Ok | |
| 13 | 04:57:54:070PM | Plasma | Ok | |