| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch,Yijun Lin |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Bill Parkin,Bill Byford |
| Engineering Operator Run Comment |
| RF Conditioning; SL: S. Wukitch, Y. Lin; PO: D. Mossessian; EO: Byford/P |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:29:710PM |
| Author: To Be Determined |
| Engineering setup for Thursday 08 Aug 2002 Session leader: S. Wukitch, Y. Lin Physics operator: D. Mossessian ECDC in the morning, if possible, stopping by 07:00. Set up for possible ECDC in D2 between shots. Run begins at 11:00 and ends at 17:00. We need to modify and test the J-port arc protection before plasma operation can begin. Furthermore, we wish to vacuum condition all antennas to examine the gas evolution during vacuum conditioning. For the beginning of plasma operation, set up power systems as on 1020806013, which was a limited plasma (for the RF...no H-modes) Note: The RF will be firing into vacuum before the run begins, so we will want to do 10 minutes of ECDC just before the first plasma shot. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Enable the following gate valves, assuming no vacuum problems: ECE, VUV, DNB ------------------------------------------------------------------------------- RF Setup: FMIT#1&2 transmitters in Run On by 07:00. FMIT#3&4 transmitters in Run On by 09:30. ------------------------------------------------------------------------------- Run Plan: Work on D, E, and J systems into plasma. Start by loading segment 2 from 1020806013 (limiter plasma)and let the RF go at it. We may switch to a diverted shot later in the day (use segment 2 from 1020802021) ------------------------------------------------------------------------------- 001 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.2-1.5]sec E: 1.2 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: fizzle 002 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.2-1.5]sec E: 1.2 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: fizzle 003 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.2-1.5]sec E: 1.2 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.2 MW good J: 0.6 MW initially ramped but failed on retries (all phase balance faults) action: raise D and E by 100 kW each retune J and raise phase balance power threshold from 6.9 V to 7.5 V 004 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.2-1.5]sec E: 1.3 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.3 MW good E: 1.3 MW good J: 0.6 MW (only two faults - phase balance but fast data indicate the reflected power was increasing rapidly suggesting an arc was more sensitively detected by the phase balance circuit) First time the three had run together this campaign action: raise power by 0.1 MW on D and E raise power by 0.2 MW on J 005 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.4 MW ramp @[1.2-1.5]sec E: 1.4 MW ramp @[1.2-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.4 MW good E: 1.4 MW good J: 0.8 MW several faults - looks like arcing action: raise D and E to 1.5 MW 006 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.2-1.5]sec E: 1.5 MW ramp @[1.2-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.5 MW good E: 1.5 MW good J: 0.8 MW several faults - looks like arcing action: increase width of D and E-port pulse 007 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.2-1.5]sec E: 1.5 MW ramp @[1.2-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle increase pedestal level from 0.6 V to 1.0 V 008 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.5 MW faulted and failed on the retries due to phase balance E: 1.5 MW good J: 0.8 MW faulted - pedestal was above arc power threshold -> arc indication before the sources have phase locked. action: raise D phase balance to 2.0 V from 1.162 V lower pedestal level from 1.0 V to 0.8 V 009 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.5 MW faulted and failed on the retries due to phase balance E: 1.5 MW good J: 0.8 MW faulted but retries were better action: lower power on D-port 010 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle 011 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.5 MW good J: 0.8 MW faulted - more phase lock problems 012 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle 013 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.3 MW two faults E: 1.5 MW good J: 0.8 MW better action: raise J to 1 MW 014 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle 015 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.0 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW faulted off E: 1.5 MW good J: 1.0 MW faults action: raise J to 1.2 MW 016 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.1 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.2 MW ramp @[0.6-1.5]sec result: plasma D: 1.1 MW good E: 1.5 MW good J: 1.2 MW reasonable 017 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.4 MW ramp @[0.6-1.5]sec result: fizzle 018 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.4 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.5 MW good J: 1.4 MW reasonable 019 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.5 MW good J: 1.4 MW multiple faults action: lower field to 5 T 020 request: inner wall limited Ip~0.8 MA, BT~5.0 T, nl_04~1x10^20 m^-2 D: 1.4 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.6 MW ramp @[0.6-1.5]sec result: fizzle 021 request: inner wall limited Ip~0.8 MA, BT~5.0 T, nl_04~1x10^20 m^-2 D: 1.4 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.4 MW faulted E: 1.5 MW good J: 1.4 MW multiple faults action: lower field to 4.6 T 022 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.6 MW ramp @[0.6-1.5]sec result: plasma J: 1.8 MW multiple faults - arcs 023 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.8 MW ramp @[0.6-1.5]sec result: dud 024 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.8 MW ramp @[0.6-1.5]sec result: dud 025 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.8 MW ramp @[0.6-1.5]sec result: fizzle Summary: Since the previous run on Tuesday, we have modified the J-port DC1 arc detector modules. (On Tuesday we had a false arc indication from J3DC1 and we have had continual problems with the phase balance power threshold. Changing to the new demodulators should remedy these problems.) After changing these units, we did vacuum conditioning on all three antennas. When we finished, the pressure rise associated with D and E was below detection limits but J-port was indicating a measureable gas puff. Each antenna was reconditioned to ~35 kV and the process was much easier than it has been in the recent past. We examined the B-dot data from [0,0,0,0] and [0,pi,0,pi] vacuum shots. With [0,0,0,0] phasing the STOP and SBOT show similar signal levels (low as expected). For [0,pi,0,pi] phasing, the STOP has little signal and SBOT is very large (larger than expected). We will perform a time domain test on the probes to verify their functioning state. If the probes are in fact working, we will need more testing to confirm these observations and some modeling to understand the measurements. Operation into plasma was improved for all antennas. The maximum injected power was ~3.8 MW (1.5 MW from D and E-port and 0.8 MW from J-port)[1020808006]. After obtaining 1.5 MW on D and E, we concentrated on J-port and lowered the toroidal field to 4.6 T. We obtained 1.8 MW for ~0.1 sec from J-port. We also confirmed the improved J-port arc detection functioned properly and that the phase feedback appears to require 15 msec to lock. J-port appears to require more conditioning to become functional for physics operations. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:15:600PM |
| Author: To Be Determined |
| Physop summary for Thursday, August 08, 2002 ============================================================== The plan: Engineering setup for Thursday 08 Aug 2002 Session leader: S. Wukitch, Y. Lin Physics operator: D. Mossessian ECDC in the morning, if possible, stopping by 07:00. Set up for possible ECDC in D2 between shots. Run begins at 11:00 and ends at 17:00. We need to modify and test the J-port arc protection before plasma operation can begin. Furthermore, we wish to vacuum condition all antennas to examine the gas evolution during vacuum conditioning. For the beginning of plasma operation, set up power systems as on 1020806013, which was a limited plasma (for the RF...no H-modes) Note: The RF will be firing into vacuum before the run begins, so we will want to do 10 minutes of ECDC just before the first plasma shot. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Enable the following gate valves, assuming no vacuum problems: ECE, VUV, DNB ------------------------------------------------------------------------------- RF Setup: FMIT#1&2 transmitters in Run On by 07:00. FMIT#3&4 transmitters in Run On by 09:30. ------------------------------------------------------------------------------- Run Plan: Work on D, E, and J systems into plasma. Start by loading segment 2 from 1020806013 (limiter plasma)and let the RF go at it. We may switch to a diverted shot later in the day (use segment 2 from 1020802021) ====================================================================== Summary: The run started at 11:15 and continued to 17:00 with variabe succes. The main problem was unreliable startup. For some reason Br was oscillating at the startup phase, although it is not clear whether it was the reason for multiple fizzles we had. Generally, by playing with fileds we were able to get every second shot to develop a plasma. Moving the downward step in Br gain farther into the shot (to 0.025 s) at shot 20 seem to help somewhat. Then at 16:30 we had a dud for no apparent reason. Another dud followed and adding Argon to startup phase (following S. Wolfe's advise) produced a fizzle with very late breakdown on the las shot. On shot 20 the field 3was changed to 5T at RF's request, on shot 22 it was dropped further to 4.6 T 25 shots 9 fizzles 2 duds 14 plasmas ========================================================================= Details: 1020808001 Fizzle. late breakdown (0.01 s), virtually no current rise. The fields look the same as on good shots. For next shot - drop prepuff 0.025 s -> 0.023 s ----------------------------------------------------------------------------- 1020808002 Fizzle. A little faster current rise and a little more current. Still late breakdown For next shot - less gas: pulse_gas4 23 -> 21 ms; Bz up: IC_EF4 -1330 -> -1310 ----------------------------------------------------------------------------- 1020808003 PLasma. The breakdown is still late (0.008 s) , the current rise after that is OK. For next shot - drop prepuff from 21 ms to 19 ms. ----------------------------------------------------------------------------- 1020808004 PLasma. Still late breakdown. For next shot - Bz up alittle : IC_EF4 -1310 -> -1305 ----------------------------------------------------------------------------- 1020808005 mossessian PHYSICS_OPERATOR Aug 8 2002 12:31:53:266PM . . . . . . . . . . . . . . . . . . . . PLasma. Breakdown time does not change For next shot - no changes. ----------------------------------------------------------------------------- 1020808006 mossessian PHYSICS_OPERATOR Aug 8 2002 12:32:29:296PM . . . . . . . . . . . . . . . . . . . . Plasma. For next shot - no changes. ----------------------------------------------------------------------------- 1020808007 mossessian PHYSICS_OPERATOR Aug 8 2002 1:13:10:593PM . . . . . . . . . . . . . . . . . . . . Fizzle. Large excursion of Br between 0.01 and 0.02 s causes the untimely death of the plasma. For next shot - no PCS changes. ----------------------------------------------------------------------------- 1020808008 mossessian PHYSICS_OPERATOR Aug 8 2002 1:13:21:313PM . . . . . . . . . . . . . . . . . . . . Plasma For next shot - no PCS changes. ----------------------------------------------------------------------------- 1020808009 mossessian PHYSICS_OPERATOR Aug 8 2002 1:20:03:643PM . . . . . . . . . . . . . . . . . . . . Plasma For next shot - no PCS changes. ----------------------------------------------------------------------------- 1020808010 mossessian PHYSICS_OPERATOR Aug 8 2002 1:47:40:483PM . . . . . . . . . . . . . . . . . . . . Fizzle. Oscillations in Br again. For next shot - no PCS changes. ----------------------------------------------------------------------------- 1020808011 mossessian PHYSICS_OPERATOR Aug 8 2002 1:55:43:813PM . . . . . . . . . . . . . . . . . . . . Plasma For next shot - no PCS changes. ----------------------------------------------------------------------------- 1020808012 mossessian PHYSICS_OPERATOR Aug 8 2002 2:10:59:976PM . . . . . . . . . . . . . . . . . . . . Fizzle. Br still oscillates. However, Steve suggests that too positive Bz cayses our problems. For next shot -try making Bz more negative. IC_EF4 -1305 -> -1315 ----------------------------------------------------------------------------- 1020808013 mossessian PHYSICS_OPERATOR Aug 8 2002 2:32:16:610PM . . . . . . . . . . . . . . . . . . . . plasma For next shot - no PCS changes ----------------------------------------------------------------------------- 1020808014 mossessian PHYSICS_OPERATOR Aug 8 2002 2:35:09:923PM . . . . . . . . . . . . . . . . . . . . Fizzle - Bz too low. For next shot - IC_EF4 -1305 -> -1300 ----------------------------------------------------------------------------- 1020808015 mossessian PHYSICS_OPERATOR Aug 8 2002 2:49:58:520PM . . . . . . . . . . . . . . . . . . . . Plasma For next shot - no changes ----------------------------------------------------------------------------- 1020808016 mossessian PHYSICS_OPERATOR Aug 8 2002 3:00:31:886PM . . . . . . . . . . . . . . . . . . . . Plasma. No fields data available, so we will not change anything. For next shot - no changes ----------------------------------------------------------------------------- 1020808017 mossessian PHYSICS_OPERATOR Aug 8 2002 3:15:12:016PM . . . . . . . . . . . . . . . . . . . . Fizzle. No fields data available the ques on CLARET are stalled. Let's guess: For next shot - IC_EF4 -1300 -> -1310 ----------------------------------------------------------------------------- 1020808019 mossessian PHYSICS_OPERATOR Aug 8 2002 3:40:37:586PM . . . . . . . . . . . . . . . . . . . . Plasma. Next shot - no changes. ----------------------------------------------------------------------------- 1020808018 mossessian PHYSICS_OPERATOR Aug 8 2002 3:40:49:980PM . . . . . . . . . . . . . . . . . . . . Plasma. Next shot - no changes. ----------------------------------------------------------------------------- 1020808020 mossessian PHYSICS_OPERATOR Aug 8 2002 4:05:51:130PM . . . . . . . . . . . . . . . . . . . . At RF's request the field was changed to 5 T. TF current 150000 -> 141000 Fizzle. Bz a little too high. Br oscillates For next shot - Bz: IC_EF4 -1310 -> -1315; moved downward step in Br gain from 0.01 to 0.025 s ----------------------------------------------------------------------------- 1020808021 mossessian PHYSICS_OPERATOR Aug 8 2002 4:16:02:243PM . . . . . . . . . . . . . . . . . . . . PLasma. 5.0 T. Br does not oscillate. For next shot - TF current down 141000 -> 131000 for 4.6 T ----------------------------------------------------------------------------- 1020808022 mossessian PHYSICS_OPERATOR Aug 8 2002 4:35:46:530PM . . . . . . . . . . . . . . . . . . . . PLasma. 4.7 T. For next shot - no changes ----------------------------------------------------------------------------- 1020808023 mossessian PHYSICS_OPERATOR Aug 8 2002 4:44:17:486PM . . . . . . . . . . . . . . . . . . . . Dud. No apparent reason. Next shot - Bz up a little: -1315 -> -1310 ----------------------------------------------------------------------------- 1020808024 mossessian PHYSICS_OPERATOR Aug 8 2002 4:54:05:350PM . . . . . . . . . . . . . . . . . . . . Dud. For next shot - Set Argon pulse in startup segment - copied trace from pulse_gas4 (prepuff) into pulse_gas1 (Ar) ----------------------------------------------------------------------------- 1020808025 mossessian PHYSICS_OPERATOR Aug 8 2002 5:00:44:120PM . . . . . . . . . . . . . . . . . . . . Fizzle. Very late breakdown. - |
| Session Leader Comments | |||
| Aug 8 2002 11:21:45:537AM | 1020808001 | Steve Wukitch | 001 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.2-1.5]sec E: 1.2 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 11:50:39:873AM | 1020808002 | Steve Wukitch | 002 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.2-1.5]sec E: 1.2 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 12:04:54:380PM | 1020808003 | Steve Wukitch | 003 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.2-1.5]sec E: 1.2 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.2 MW good J: 0.6 MW initially ramped but failed on retries (all phase balance faults) action: raise D and E by 100 kW each retune J and raise phase balance power threshold from 6.9 V to 8.0 V |
| Aug 8 2002 12:14:40:040PM | 1020808004 | Steve Wukitch | 004 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.2-1.5]sec E: 1.3 MW ramp @[1.2-1.5]sec J: 0.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.3 MW good E: 1.3 MW good J: 0.6 MW (only two faults - phase balance but fast data indicate the reflected power was increasing rapidly suggesting an arc was more sensitively detected by the phase balance circuit) First time the three had run together this campaign action: raise power by 0.1 MW on D and E raise power by 0.2 MW on J |
| Aug 8 2002 12:23:11:497PM | 1020808005 | Steve Wukitch | 005 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.4 MW ramp @[1.2-1.5]sec E: 1.4 MW ramp @[1.2-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.4 MW good E: 1.4 MW good J: 0.8 MW several faults - looks like arcing action: raise D and E to 1.5 MW |
| Aug 8 2002 12:41:34:490PM | 1020808006 | Steve Wukitch | 006 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.2-1.5]sec E: 1.5 MW ramp @[1.2-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.5 MW good E: 1.5 MW good J: 0.8 MW several faults - looks like arcing action: increase width of D and E-port pulse |
| Aug 8 2002 12:48:54:897PM | 1020808007 | Steve Wukitch | 007 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.2-1.5]sec E: 1.5 MW ramp @[1.2-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 01:18:37:707PM | 1020808008 | Steve Wukitch | 008 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.5 MW faulted and failed on the retries due to phase balance E: 1.5 MW good J: 0.8 MW faulted - pedestal was above arc power threshold -> arc indication before the sources have phase locked. action: raise D phase balance to 2.0 V from 1.162 V lower pedestal level from 1.0 V to 0.8 V |
| Aug 8 2002 01:34:20:947PM | 1020808009 | Steve Wukitch | 009 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.5 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.5 MW faulted and failed on the retries due to phase balance E: 1.5 MW good J: 0.8 MW faulted but retries were better action: lower power on D-port |
| Aug 8 2002 01:34:50:260PM | 1020808010 | Steve Wukitch | 010 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 02:03:09:800PM | 1020808011 | Steve Wukitch | 011 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.5 MW good J: 0.8 MW faulted - more phase lock problems |
| Aug 8 2002 02:03:24:550PM | 1020808012 | Steve Wukitch | 012 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 02:37:47:580PM | 1020808014 | Steve Wukitch | 014 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.3 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 02:42:28:490PM | 1020808015 | Steve Wukitch | 015 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 0.8 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW faulted off E: 1.5 MW good J: 1.0 MW still faults action: raise J to 1.2 MW |
| Aug 8 2002 03:16:18:030PM | 1020808016 | Steve Wukitch | 016 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.1 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.2 MW ramp @[0.6-1.5]sec result: plasma D: 1.1 MW good E: 1.5 MW good J: 1.2 MW reasonable |
| Aug 8 2002 03:16:53:923PM | 1020808017 | Steve Wukitch | 017 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.4 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 03:26:32:613PM | 1020808018 | Steve Wukitch | 018 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.4 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.5 MW good J: 1.4 MW reasonable |
| Aug 8 2002 04:06:11:317PM | 1020808019 | Steve Wukitch | 019 request: inner wall limited Ip~0.8 MA, BT~5.4 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.2 MW good E: 1.5 MW good J: 1.4 MW multiple faults action: lower field to 5 T |
| Aug 8 2002 04:17:43:007PM | 1020808020 | Steve Wukitch | 020 request: inner wall limited Ip~0.8 MA, BT~5.0 T, nl_04~1x10^20 m^-2 D: 1.2 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.6 MW ramp @[0.6-1.5]sec result: fizzle |
| Aug 8 2002 04:21:43:167PM | 1020808021 | Steve Wukitch | 021 request: inner wall limited Ip~0.8 MA, BT~5.0 T, nl_04~1x10^20 m^-2 D: 1.4 MW ramp @[1.0-1.5]sec E: 1.5 MW ramp @[1.0-1.5]sec J: 1.6 MW ramp @[0.6-1.5]sec result: plasma D: 1.4 MW faulted E: 1.5 MW good J: 1.4 MW multiple faults action: lower field to 4.6 T |
| Aug 8 2002 04:49:10:613PM | 1020808022 | Steve Wukitch | 022 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.6 MW ramp @[0.6-1.5]sec result: plasma J: 1.8 MW multiple faults - arcs |
| Aug 8 2002 04:49:40:257PM | 1020808023 | Steve Wukitch | 023 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.8 MW ramp @[0.6-1.5]sec result: dud |
| Aug 8 2002 04:49:57:100PM | 1020808024 | Steve Wukitch | 024 request: inner wall limited Ip~0.8 MA, BT~4.6 T, nl_04~1x10^20 m^-2 D: off E: off J: 1.8 MW ramp @[0.6-1.5]sec result: dud |
| Physics Operator Comments | |||
| Aug 8 2002 11:03:51:670AM | Dmitri Mossessian | Run Plan: Work on D, E, and J systems into plasma. Start by loading segment 2 from 1020806013 (limiter plasma)and let the RF go at it. We may switch to a diverted shot later in the day (use segment 2 from 1020802021) 10:55 - Loaded segment 2 from 1020806013. Segment 1 is still from 1020807035 (last shot yesterday), although the startup does not look very good there - might want to change to a different startup later on. Coldstart OK | |
| Aug 8 2002 11:42:06:010AM | 1020808001 | Dmitri Mossessian | Fizzle. late breakdown (0.01 s), virtually no current rise. The fields look the same as on good shots. For next shot - drop prepuff 0.025 s -> 0.023 s |
| Aug 8 2002 11:42:35:120AM | 1020808002 | Dmitri Mossessian | Fizzle. A little faster current rise and a little more current. Still late breakdown For next shot - less gas: pulse_gas4 23 -> 21 ms; Bz up: IC_EF4 -1330 -> -1310 |
| Aug 8 2002 12:31:11:000PM | 1020808003 | Dmitri Mossessian | PLasma. The breakdown is still late (0.008 s) , the current rise after that is OK. For next shot - drop prepuff from 21 ms to 19 ms. |
| Aug 8 2002 12:31:43:373PM | 1020808004 | Dmitri Mossessian | PLasma. Still late breakdown. For next shot - Bz up alittle : IC_EF4 -1310 -> -1305 |
| Aug 8 2002 12:31:53:267PM | 1020808005 | Dmitri Mossessian | PLasma. Breakdown time does not change For next shot - no changes. |
| Aug 8 2002 12:32:29:297PM | 1020808006 | Dmitri Mossessian | Plasma. For next shot - no changes. |
| Aug 8 2002 01:13:10:593PM | 1020808007 | Dmitri Mossessian | Fizzle. Large excursion of Br between 0.01 and 0.02 s causes the untimely death of the plasma. For next shot - no PCS changes. |
| Aug 8 2002 01:13:21:313PM | 1020808008 | Dmitri Mossessian | Plasma For next shot - no PCS changes. |
| Aug 8 2002 01:20:03:643PM | 1020808009 | Dmitri Mossessian | Plasma For next shot - no PCS changes. |
| Aug 8 2002 01:47:40:483PM | 1020808010 | Dmitri Mossessian | Fizzle. Oscillations in Br again. For next shot - no PCS changes. |
| Aug 8 2002 01:55:43:813PM | 1020808011 | Dmitri Mossessian | Plasma For next shot - no PCS changes. |
| Aug 8 2002 02:10:59:977PM | 1020808012 | Dmitri Mossessian | Fizzle. Br still oscillates. However, Steve suggests that too positive Bz cayses our problems. For next shot -try making Bz more negative. IC_EF4 -1305 -> -1315 |
| Aug 8 2002 02:32:16:610PM | 1020808013 | Dmitri Mossessian | plasma For next shot - no PCS changes |
| Aug 8 2002 02:35:09:923PM | 1020808014 | Dmitri Mossessian | Fizzle - Bz too low. For next shot - IC_EF4 -1305 -> -1300 |
| Aug 8 2002 02:49:58:520PM | 1020808015 | Dmitri Mossessian | Plasma For next shot - no changes |
| Aug 8 2002 03:00:31:887PM | 1020808016 | Dmitri Mossessian | Plasma. No fields data available, so we will not change anything. For next shot - no changes |
| Aug 8 2002 03:15:12:017PM | 1020808017 | Dmitri Mossessian | Fizzle. No fields data available the ques on CLARET are stalled. Let's guess: For next shot - IC_EF4 -1300 -> -1310 |
| Aug 8 2002 03:40:49:980PM | 1020808018 | Dmitri Mossessian | Plasma. Next shot - no changes. |
| Aug 8 2002 03:40:37:587PM | 1020808019 | Dmitri Mossessian | Plasma. Next shot - no changes. |
| Aug 8 2002 04:05:51:130PM | 1020808020 | Dmitri Mossessian | At RF's request the field was changed to 5 T. TF current 150000 -> 141000 Fizzle. Bz a little too high. Br oscillates For next shot - Bz: IC_EF4 -1310 -> -1315; moved downward step in Br gain from 0.01 to 0.025 s |
| Aug 8 2002 04:16:02:243PM | 1020808021 | Dmitri Mossessian | PLasma. 5.0 T. Br does not oscillate. For next shot - TF current down 141000 -> 131000 for 4.6 T |
| Aug 8 2002 04:35:46:530PM | 1020808022 | Dmitri Mossessian | PLasma. 4.7 T. For next shot - no changes |
| Aug 8 2002 04:44:17:487PM | 1020808023 | Dmitri Mossessian | Dud. No apparent reason. Next shot - Bz up a little: -1315 -> -1310 |
| Aug 8 2002 04:54:05:350PM | 1020808024 | Dmitri Mossessian | Dud. For next shot - Set Argon pulse in startup segment - copied trace from pulse_gas4 (prepuff) into pulse_gas1 (Ar) |
| Aug 8 2002 05:00:44:120PM | 1020808025 | Dmitri Mossessian | Fizzle. Very late breakdown. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 11:18:45:970AM | Plasma | Ok | |
| 2 | 11:34:25:180AM | Plasma | Ok | |
| 3 | 11:47:04:497AM | Plasma | Ok | |
| 4 | 12:03:20:380PM | Plasma | Ok | |
| 5 | 12:15:48:103PM | Plasma | Ok | |
| 6 | 12:29:08:670PM | Plasma | Ok | |
| 7 | 12:42:19:770PM | Plasma | Ok | |
| 8 | 01:03:21:277PM | Plasma | Ok | |
| 9 | 01:17:06:360PM | Plasma | Ok | |
| 10 | 01:32:05:383PM | Plasma | Ok | |
| 11 | 01:46:04:983PM | Plasma | Ok | |
| 12 | 01:58:23:347PM | Plasma | Ok | |
| 13 | 02:11:58:400PM | Plasma | Ok | |
| 14 | 02:24:26:760PM | Plasma | Ok | |
| 15 | 02:36:59:127PM | Plasma | Ok | |
| 16 | 02:52:40:397PM | Plasma | Ok | |
| 17 | 03:05:57:230PM | Plasma | Ok | |
| 18 | 03:20:23:393PM | Plasma | Ok | |
| 19 | 03:35:43:180PM | Plasma | Ok | |
| 20 | 03:55:37:017PM | Plasma | Ok | |
| 21 | 04:08:21:147PM | Plasma | Ok | |
| 22 | 04:21:25:870PM | Plasma | Ok | |
| 23 | 04:33:52:280PM | Plasma | Ok | |
| 24 | 04:46:11:427PM | Plasma | Ok | |
| 25 | 04:58:36:087PM | Plasma | Ok | |