| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Bill Cochran,Andy Pfeiffer |
| Engineering Operator Run Comment |
| MP #326: ICRF Antenna Comparison and Evaluation |
| Session Leader Plans |
| Entered: May 31 2005 04:46:33:480PM |
| Author: Steve Wukitch |
| Engineering setup for Wednesday, 1 June 2005 MP #326: ICRF Antenna Comparison and Evaluation Session leader: S. Wukitch Physics operator: J. Irby Overnight ECDC in D2, 2.e-4 torr; Bake at 60 C. Run begins at 09:00 and ends at 17:00. Power systems as on 1050526026 (1.0MA, 5.4 T vanilla plasma) 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 Hybrid DISABLED (PG1) leave B-side upper with whatever Hybrid disabled fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) (During the run we will switch B-main to He4) NINJA not used today Torvac setup: machine gate valves to remain open during and after shot. Enable the following gate valves, assuming no vacuum problems: ECE, VUV, Z-bolo shutters Necessary diagnostics: titanium monitoring, video monitors, H/D ratio ------------------------------------------------------------------------------- all ICRF transmitters to run-on by 8:30 am ------------------------------------------------------------------------------- We will continue with antenna recovery effort. We will start with D plasmas and attempt to identify the source of density (machine or localized to a particular antenna). We will then switcht to He discharges to see if the voltage handling improves. This test will include both LSN and USN discharges. |
| Physics Operators Plans |
| Entered: May 31 2005 04:50:44:683PM |
| Author: Jim Irby |
| Engineering setup for Wednesday, 1 June 2005
MP#325 ICRF Antenna Comparison and Evaluation Session Leader: Wukitch Physics operator: Irby Overnight ECDC in D2, 2.e-4 torr; Bake at 60 C. Run begins at 09:00 and ends at 17:00. Power systems as on 1050526017 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 Hybrid DISABLED (PG1) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) Be prepared to switch to Helium fueling mid-run. Enable the following gate valves: ECE, VUV, Z-bolo shutters diagnostics: continue to carefully monitor titanium, moly, video monitors, and H/D ratio ICRF Setup: All transmitters in run on at 08:30 |
| Session Leader Summaries |
| Entered: Jun 1 2005 04:45:25:630PM |
| Author: Steve Wukitch |
| Run Summary:
Limited number of discharges due to fizzle dud problem (may be related to power supply problem) and network problems. Spent most of afternoon troubleshooting power supply problem. |
| Physics Operator Summaries |
| Entered: Jun 1 2005 05:40:39:333PM |
| Author: Jim Irby |
| Not a very good day. An instrumentation problem with OH1 resulted in
current offsets that could not easily be compensated. We managed to get only three full length discharges (07, 09 and 22). We stopped trying to produced plasmas on shot 19 and began tests of the oh1 supply. Several OH1 only tests were run. After going through the supply looking for problems we found things were back to normal on shot 21. We successfully tried for plasma again on shot 22. Several network problems also complicated and delayed the run. |
| Session Leader Comments | |||
| Jun 1 2005 09:21:55:410AM | 1050601001 | Steve Wukitch | 001 Ip~1 MA, BT~5.4 T, fiducial
D: 0.3 MW [0.5,1.7] sec E: 1 MW [1.1,1.5] sec J: 2 MW [0.5,1] sec result: NTP |
| Jun 1 2005 09:48:22:520AM | 1050601002 | Steve Wukitch | 002 no power shot |
| Jun 1 2005 10:01:18:550AM | 1050601003 | Steve Wukitch | 003 NTP |
| Jun 1 2005 10:24:55:113AM | 1050601004 | Steve Wukitch | 004 NTP |
| Jun 1 2005 10:26:57:940AM | 1050601005 | Steve Wukitch | 005 NTP |
| Jun 1 2005 11:04:17:113AM | 1050601006 | Steve Wukitch | 006 NTP |
| Jun 1 2005 11:23:54:707AM | 1050601007 | Steve Wukitch | 007 Ip~1 MA, BT~5.4 T, fiducial
D: 0.3 MW [0.5,1.7] sec E: 1 MW [1.1,1.5] sec J: 2 MW [0.5,1] sec result: plasma D: ran max faults E: max faults - poor match J: ran max faults |
| Jun 1 2005 11:24:05:897AM | 1050601008 | Steve Wukitch | 008 NTP |
| Jun 1 2005 11:36:23:583AM | 1050601009 | Steve Wukitch | 009 Ip~1 MA, BT~5.4 T, fiducial
D: 0.3 MW [0.5,1.7] sec E: 1 MW [1.1,1.5] sec J: 2 MW [0.5,1] sec result: plasma D: ran max faults E: max faults J: ran 9 faults |
| Jun 1 2005 11:51:38:350AM | 1050601010 | Steve Wukitch | 010 NTP |
| Jun 1 2005 12:13:38:833PM | 1050601011 | Steve Wukitch | 011 NTP |
| Jun 1 2005 12:52:34:590PM | 1050601012 | Steve Wukitch | 012 NTP |
| Jun 1 2005 12:52:45:997PM | 1050601013 | Steve Wukitch | 013 NTP |
| Jun 1 2005 12:52:54:387PM | 1050601014 | Steve Wukitch | 014 NTP |
| Jun 1 2005 12:57:57:137PM | 1050601015 | Steve Wukitch | 015 NTP |
| Jun 1 2005 01:19:33:897PM | 1050601016 | Steve Wukitch | 016 NTP |
| Jun 1 2005 03:53:36:787PM | 1050601017 | Steve Wukitch | 017 NTP
long break due to network problem |
| Jun 1 2005 03:53:46:820PM | 1050601018 | Steve Wukitch | 018 NTP
|
| Physics Operator Comments | |||
| Jun 1 2005 09:52:05:817AM | 1050601002 | Jim Irby | no power cycle test to make sure the gas level is okay --- while we figure out the flux loop problem.
gas factor of two high, but gatevalves were closed |
| Jun 1 2005 09:57:59:253AM | 1050601003 | Jim Irby | unable to figure out which flux loop was causing the problem --- try again
added 2 ms to prefill dud #2 --- too little gas! |
| Jun 1 2005 10:21:44:850AM | 1050601004 | Jim Irby | increased prefill by 4 ms to 28 ms total
fizzle br0 and bz0 are certainly off --- still not sure of cause |
| Jun 1 2005 10:36:47:020AM | 1050601005 | Jim Irby | br0 from -0.0005 to 0.0000 T
ef4 from -1300 to -1340 A fizzle br0 still low at breakdown bzo looks okay |
| Jun 1 2005 10:55:10:020AM | 1050601006 | Jim Irby | increased br0 to +0.00025 T
dud br0 looks very good bz0 swinging rapidly --- time history changed from last week |
| Jun 1 2005 11:29:10:537AM | 1050601007 | Jim Irby | cell access to check out gas puff and/or dnb
increased ef4 from -1340 to -1320 increased prefill to 30 ms from 28. plasma into rampdown nice h-mode following rf BIII signal from K-top is now back in operation h/(h+d) 3.5% dust still seen on DANT view |
| Jun 1 2005 11:28:35:363AM | 1050601008 | Jim Irby | repeat
fizzle --- |
| Jun 1 2005 11:46:30:287AM | 1050601009 | Jim Irby | repeat
plasma into rampdown h/(h+d) at 4% 2 MW of rf from J |
| Jun 1 2005 11:51:53:897AM | 1050601010 | Jim Irby | no changes
fizzle --- not a good pattern pressure is creeping up br0 evolving |
| Jun 1 2005 12:05:58:003PM | 1050601011 | Jim Irby | br0 from +0.00025 to 0.0000
reduced prefill by 2 ms to 28 ms dud --- I guess I know which way to go now.... |
| Jun 1 2005 12:17:22:457PM | 1050601012 | Jim Irby | prefill to 32 ms from 28.
fizzle gas low, br0 low |
| Jun 1 2005 12:38:04:707PM | 1050601013 | Jim Irby | br0 back to 0.00025 T
gas prefill to 34 ms from 32. fizzle breakdown late |
| Jun 1 2005 12:53:02:387PM | 1050601014 | Jim Irby | reduced prefill to 30 from 32 ms
fizzle still have late breakdown |
| Jun 1 2005 01:05:40:523PM | 1050601015 | Jim Irby | prefill from 32 to 30 ms
increased gain on OH1 supply from 1 to 1.25 --- may have made offset worse fizzle |
| Jun 1 2005 01:19:50:070PM | 1050601016 | Jim Irby | oh1 supply gain from 1.25 back to 1.
prefill from 30 to 28 ms dud --- no range in gas stopping for Bill C to check Oh1 supply control... |
| Jun 1 2005 03:38:07:367PM | 1050601018 | Jim Irby | no changes, but very long delay as we checked supplies and fixed network problems
fizzle looks like we have a instrumentation problem problem with the voltage reporting from the oh1 supply. Seem to have lower voltage in supply than on the bus. |
| Jun 1 2005 03:55:14:350PM | 1050601019 | Jim Irby | oh1 plc test with voltage limit set at 500 volts
forward bridge |
| Jun 1 2005 04:14:23:037PM | 1050601020 | Jim Irby | 1 kA PLC test === repeat of 1050203015 --- compare voltages |
| Jun 1 2005 05:20:54:507PM | 1050601021 | Jim Irby | repeat |
| Jun 1 2005 05:29:07:897PM | 1050601022 | Jim Irby | Bill and Gary went through OH1 supply doing various tests. No problem found, but the supply has been fixed. No OH1 current offset.
plasma into rampdown |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:14:34:740AM | Plasma | Ok | |
| 2 | 09:39:10:443AM | Test | Ok | |
| 3 | 09:52:54:647AM | Plasma | Ok | |
| 4 | 10:05:31:850AM | Plasma | Ok | |
| 5 | 10:25:36:863AM | Plasma | Ok | |
| 6 | 10:38:35:927AM | Plasma | Ok | |
| 7 | 11:02:45:520AM | Plasma | Ok | |
| 8 | 11:15:26:490AM | Plasma | Ok | |
| 9 | 11:32:14:160AM | Plasma | Ok | |
| 10 | 11:45:12:787AM | Plasma | Ok | |
| 11 | 11:57:44:473AM | Plasma | Ok | |
| 12 | 12:10:24:690PM | Plasma | Ok | |
| 13 | 12:22:52:347PM | Plasma | Ok | |
| 14 | 12:37:58:223PM | Plasma | Ok | |
| 15 | 12:55:39:750PM | Plasma | Ok | |
| 16 | 01:08:32:630PM | Plasma | Ok | |
| 17 | 03:13:43:677PM | Plasma | Bad | Datasystem problems |
| 18 | 03:24:08:020PM | Plasma | Ok | |
| 19 | 03:42:16:770PM | Test | Ok | OH1 Test |
| 20 | 03:55:09:693PM | Test | Ok | |
| 21 | 04:58:09:710PM | Test | Ok | |
| 22 | 05:10:38:757PM | Plasma | Ok | |