| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yijun Lin |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Bill Byford,Bill Parkin,Bill Cochran |
| Engineering Operator Run Comment |
| Purpose: RF Conditioning and Debug Bus Instrumentation/Noise Problem. |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:17:740PM |
| Author: To Be Determined |
| Physop Summary for Run 1030509 --- RF conditioning EO: Cochran, Byford, Parkin PO: Irby SL: Lin We spent a lot of the day trying to debug the noise that is getting into the bus Rogowskis and shunts and eventually causing disruptions. We began the run with tests of the EF3, EF4, and TF supplies. The supplies showed no indication of a problem. On shot 04 we tried for plasma and got a very nice startup. Everything went well until shot 12 when the problem ocurred again. After checking all the breakers except EF3, we did a no power cycle test on 13, followed by resumed plasma operation on shot 14. On a more positive note, we were getting up to 4.5 MW of rf power into the machine today, and Earl got a few pellets launched. Also should note that startup was 100% today. tests 04 plasmas 14 cycles 18 ---------------------------------------------------------------------------- 1030509001 irby PHYSICS_OPERATOR May 9 2003 8:27:34:463AM . . . . . . . . . . . . . . . . . . . . Start with EF3 pulse Got it... nothing seen on shunts ---------------------------------------------------------------------------- 1030509002 irby PHYSICS_OPERATOR May 9 2003 8:47:34:233AM . . . . . . . . . . . . . . . . . . . . EF4 reverse bridge first got it --- nothing seen ---------------------------------------------------------------------------- 1030509003 irby PHYSICS_OPERATOR May 9 2003 9:16:28:240AM . . . . . . . . . . . . . . . . . . . . EF4 Forward bridge got it --- nothing seen ---------------------------------------------------------------------------- 1030509004 irby PHYSICS_OPERATOR May 9 2003 9:53:04:466AM . . . . . . . . . . . . . . . . . . . . 150 kA TF under PLC control got it --- nothing seen ---------------------------------------------------------------------------- 1030509005 irby PHYSICS_OPERATOR May 9 2003 10:26:58:293AM . . . . . . . . . . . . . . . . . . . . gas from 20 to 25 ms. pressure was .05 vs .065 mTorr yesterday plasma --- nice startup --- no noise kept rf off, also next shot... ---------------------------------------------------------------------------- 1030509006 irby PHYSICS_OPERATOR May 9 2003 10:42:57:950AM . . . . . . . . . . . . . . . . . . . . repeat of shot 5 good shot --- no noise, no rf... ---------------------------------------------------------------------------- 1030509007 irby PHYSICS_OPERATOR May 9 2003 11:36:37:673AM . . . . . . . . . . . . . . . . . . . . long pause as we await the TF scanner to be repaired------------------- gas from 25 to 24 ms rf this shot good plasma --- some rf heating no noise on shunts. TF scanner still didn't work.... Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.8266 -12.9732 -27.6262 -120.8333 dIp/dt (kA/ms): -0.9121 -2.3469 -4.1379 -7.3156 pressure (mTorr): 0.0640 0.0626 0.0633 0.0547 Bz0 (mT): -2.5100 -0.1889 2.6939 23.1796 Br0 (mT): -0.5731 -0.8940 -1.1725 -0.6168 Pressure down more than expected, but seems to work okay... ---------------------------------------------------------------------------- 1030509008 irby PHYSICS_OPERATOR May 9 2003 12:02:58:786PM . . . . . . . . . . . . . . . . . . . . Argon from 25 to 50 ms (John claims this is okay in L mode) plasma --- some j-port coming on-line nice rampdown no noise, no scanner, Joe heads to the cell... ---------------------------------------------------------------------------- 1030509009 irby PHYSICS_OPERATOR May 9 2003 12:40:40:920PM . . . . . . . . . . . . . . . . . . . . repeat after another long TF scanner pause plasma TF scanner is back ---------------------------------------------------------------------------- 1030509010 irby PHYSICS_OPERATOR May 9 2003 12:50:52:696PM . . . . . . . . . . . . . . . . . . . . repeat plasma --- 4.5 MW of rf ! no noise ---------------------------------------------------------------------------- 1030509011 irby PHYSICS_OPERATOR May 9 2003 1:10:02:586PM . . . . . . . . . . . . . . . . . . . . gas from 24 to 23 ms plasma H/(H+D) around 12% --- came up with rf as usual approaching 5 MW of rf, Wp about 80 kJ max no TF scanner ---------------------------------------------------------------------------- 1030509012 irby PHYSICS_OPERATOR May 9 2003 2:26:23:160PM . . . . . . . . . . . . . . . . . . . . Noise problem again plasma shutdown by 80 ms going out to look at all the beaker contacts ---------------------------------------------------------------------------- 1030509013 Cycle test to check scanner ---------------------------------------------------------------------------- 1030509014 irby PHYSICS_OPERATOR May 9 2003 3:51:40:186PM . . . . . . . . . . . . . . . . . . . . All 13.8 breakers except ef3 have been inspected --- nothing was seen If we have the problem again we will take time to look at ef3 Plasma but no rf no noise ---------------------------------------------------------------------------- 1030509015 irby PHYSICS_OPERATOR May 9 2003 3:52:32:656PM . . . . . . . . . . . . . . . . . . . . repeat plasma --- rf and li pellet ---------------------------------------------------------------------------- 1030509016 irby PHYSICS_OPERATOR May 9 2003 4:21:06:443PM . . . . . . . . . . . . . . . . . . . . repeat nice plasma, just a little rf ---------------------------------------------------------------------------- 1030509017 irby PHYSICS_OPERATOR May 9 2003 4:40:26:160PM . . . . . . . . . . . . . . . . . . . . repeat plasma TF scanner looks good ---------------------------------------------------------------------------- 1030509018 irby PHYSICS_OPERATOR May 9 2003 5:03:31:586PM . . . . . . . . . . . . . . . . . . . . plasma, but lost late because noise glitches did in Rogowskis again. got some rf, but no pellet. ---------------------------------------------------------------------------- 1030509xxx irby PHYSICS_OPERATOR May 9 2003 8:17:55:790AM . . . . . . . . . . . . . . . . . . . . We will begin the run early today and try to debug noise on shunts, rogs, that is large enough to affect the Hybrid and cause disruptions (pickup on Rogowskis). Will start with full length EF3 and EF4 PLC controlled pulses. |
| Session Leader Comments |
| Physics Operator Comments | |||
| May 9 2003 08:17:55:790AM | Jim Irby | We will begin the run early today and try to debug noise on shunts, rogs, that is large enough to affect the Hybrid and cause disruptions (pickup on Rogowskis). Will start with full length EF3 and EF4 PLC controlled pulses. | |
| May 9 2003 08:27:34:463AM | 1030509001 | Jim Irby | Start with EF3 pulse Got it... nothing seen on shunts |
| May 9 2003 08:47:34:233AM | 1030509002 | Jim Irby | EF4 reverse bridge first got it --- nothing seen |
| May 9 2003 09:16:28:240AM | 1030509003 | Jim Irby | EF4 Forward bridge got it --- nothing seen |
| May 9 2003 09:53:04:467AM | 1030509004 | Jim Irby | 150 kA TF under PLC control got it --- nothing seen |
| May 9 2003 10:26:58:293AM | 1030509005 | Jim Irby | gas from 20 to 25 ms. pressure was .05 vs .065 mTorr yesterday plasma --- nice startup --- no noise kept rf off, also next shot... |
| May 9 2003 10:42:57:950AM | 1030509006 | Jim Irby | repeat of shot 5 good shot --- no noise, no rf... |
| May 9 2003 11:36:37:673AM | 1030509007 | Jim Irby | long pause as we await the TF scanner to be repaired------------------- gas from 25 to 24 ms rf this shot good plasma --- some rf heating no noise on shunts. TF scanner still didn't work.... Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.8266 -12.9732 -27.6262 -120.8333 dIp/dt (kA/ms): -0.9121 -2.3469 -4.1379 -7.3156 pressure (mTorr): 0.0640 0.0626 0.0633 0.0547 Bz0 (mT): -2.5100 -0.1889 2.6939 23.1796 Br0 (mT): -0.5731 -0.8940 -1.1725 -0.6168 Pressure down more than expected, but seems to work okay... |
| May 9 2003 12:02:58:787PM | 1030509008 | Jim Irby | Argon from 25 to 50 ms (John claims this is okay in L mode) plasma --- some j-port coming on-line nice rampdown no noise, no scanner, Joe heads to the cell... |
| May 9 2003 12:40:40:920PM | 1030509009 | Jim Irby | repeat after another long TF scanner pause plasma TF scanner is back |
| May 9 2003 12:50:52:697PM | 1030509010 | Jim Irby | repeat plasma --- 4.5 MW of rf ! no noise |
| May 9 2003 01:10:02:587PM | 1030509011 | Jim Irby | gas from 24 to 23 ms plasma H/(H+D) around 12% --- came up with rf as usual approaching 5 MW of rf, Wp about 80 kJ max no TF scanner |
| May 9 2003 02:26:23:160PM | 1030509012 | Jim Irby | Noise problem again plasma shutdown by 80 ms going out to look at all the beaker contacts |
| May 9 2003 03:51:40:187PM | 1030509014 | Jim Irby | All 13.8 breakers except ef3 have been inspected --- nothing was seen If we have the problem again we will take time to look at ef3 Plasma but no rf no noise |
| May 9 2003 03:52:32:657PM | 1030509015 | Jim Irby | repeat plasma --- rf and li pellet |
| May 9 2003 04:21:06:443PM | 1030509016 | Jim Irby | repeat nice plasma, just a little rf |
| May 9 2003 04:40:26:160PM | 1030509017 | Jim Irby | repeat plasma TF scanner looks good |
| May 9 2003 05:03:31:587PM | 1030509018 | Jim Irby | plasma, but lost late because noise glitches did in Rogowskis again. got some rf, but no pellet. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:14:16:520AM | Test | Ok | EF3 Test |
| 2 | 08:33:21:383AM | Test | Ok | EF4 reverse |
| 3 | 08:47:37:330AM | Test | Ok | EF4 Forward Test |
| 4 | 09:16:30:643AM | Test | Ok | TF test shot |
| 5 | 10:12:15:237AM | Test | Ok | |
| 6 | 10:26:10:197AM | Plasma | Ok | |
| 7 | 11:25:51:320AM | Plasma | Ok | |
| 8 | 11:49:52:707AM | Plasma | Ok | |
| 9 | 12:25:31:003PM | Plasma | Ok | |
| 10 | 12:38:40:687PM | Plasma | Ok | |
| 11 | 12:51:54:320PM | Plasma | Ok | |
| 12 | 01:07:06:800PM | Plasma | Bad | TF Fast Circuit Ground Fault |
| 13 | 03:14:02:843PM | Test | Ok | Scanner test |
| 14 | 03:23:48:663PM | Plasma | Ok | |
| 15 | 03:38:19:003PM | Plasma | Ok | |
| 16 | 03:52:07:750PM | Plasma | Ok | |
| 17 | 04:23:34:913PM | Plasma | Ok | |
| 18 | 04:37:02:017PM | Plasma | Bad | Noise fault. TF breakers opened |