Miniproposals

Miniproposal: Date Filed: Title: First Author: Session Leader: David Gwinn (shots 1-11) Session Leader: Steve Wolfe (shots 1-11)

Engineering Operator Run Comment

Engineering tests SL Wolf/Gwinn MP#268 ICRF PO:rowan SL:Wukitch/Boivin E

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:25:007PM

Author: To Be Determined

Run Plan for Friday, Oct 6, 2000 Experiments SL ------------- ---- MP#268 ICRF Wukitch/Boivin MP#248 High Performance Greenwald PO: Wolfe Plan -------------------- Now that the ground problem has been isolated to the commutation capacitor bank, we will proceed with plasma operations, in parallel with further testing to identify and replace the bad capacitor(s). The cap banks will be put back in their original systems, so that the bad bank is on OH2L, which has a 150 Ohm resistor in series with the ground fuse. Additionally, the cap cases will be lifted off ground, and regrounded through an instrumented line, in groups, so that the one carrying ground current can be determined. In this configuration, it should be possible to operate the machine "normally". Getting the cap bank set up may take some time in the morning, so the run may start late. It will probably be necessary to run some commutation tests before first plasma to verify the system. Goals of the ICRF experiment are: 1. Measure loading as a function of power comparing D, E, and J-port. (1 shot) 2. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots) 3. In L-mode and diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas. (2 shots) 4. Evaluation of maximum reliable power from J-port, and maximum total power from D, E, and J 5. Assuming total achievable power exceeds 3MW, determination of H-mode accessibility for upper-null targets; this will indicatewhether we will do reverse the field for next week. Depending on the results of the ICRF evaluation, and on time remaining, we will proceed with MP#248 (H-mode performance at high P_rf). Engineering Setup ------------------ Overnight ECDC in D2, stopping 2 hours before the run. Power systems as on 1001003009 Gas System Setup: fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled The following gate valves should be enabled: ECE, VUV, PCX "beast" at B-port RF systems: Complete the checklist and have FMIT#1-4 to run-on by 8:00 am Use match from 1001003009. Initial waveforms from 1001003009: D-port 1.5 MW 1.2-1.45 sec E-port 1.5 MW 0.6-0.85 sec J-port 1.5 MW 0.9-1.15 sec _______________________________________________________________________ Cancellation of yesterday's OPERATIONAL RESTRICTION: -------------------------- Now that the ground problem has been isolated, and shown to pose no danger to the tokamak, the previously posted requirement to monitor the ground current and/or voltage on every shot and notify Gwinn, Wolfe or Irby is RESCINDED. 001 request: Bt~5.2 T, Ip~0.8 MA, upper null D-port 1.3 MW 1.2-1.45 sec E-port 1.3 MW 0.6-0.85 sec J-port 1.3 MW 0.9-1.15 sec plasma - upper null, good comparison shot D-port 1.3 MW 1.2-1.45 sec E-port 1.3 MW 0.6-0.85 sec J-port 1.3 MW 0.9-1.15 sec one fault on #3 002 request: Bt~5.2 T, Ip~0.8 MA, upper null D-port 1. MW 1.1-1.45 sec E-port 1. MW 1.1-1.45 sec J-port 2 MW 0.6-1. sec plasma - upper null, early disruption ~0.7 sec D-port 0 MW 1.1-1.45 sec E-port 0 MW 1.1-1.45 sec J-port 1.6 MW before #3 screen xbarred antenna then ran as a monopole and injected junk which killed the plasma 003 request: Bt~5.2 T, Ip~0.8 MA, upper null D-port 1. MW 1.1-1.45 sec E-port 1. MW 1.1-1.45 sec J-port 2 MW 0.6-1. sec plasma - upper null, early disruption ~0.7 sec D-port 0 MW 1.1-1.45 sec E-port 0 MW 1.1-1.45 sec J-port 0.8 MW #3 was faulted by false fault indication antenna ran as a monopole and injected junk which killed the plasma remove attempted combined fault indicator for J-port 004 power test 005 request: Bt~5.2 T, Ip~0.8 MA, upper null D-port 1. MW 1.1-1.45 sec E-port 1. MW 1.1-1.45 sec J-port 2 MW 0.6-1. sec plasma - upper null, early disruption ~0.7 sec D-port 0 MW 1.1-1.45 sec E-port 0 MW 1.1-1.45 sec J-port 2 MW until #4 faulted and #3 screen xbarred 006 request: Bt~5.2 T, Ip~0.8 MA, upper null D-port 1. MW 1.1-1.45 sec E-port 1. MW 1.1-1.45 sec J-port 2 MW 0.6-1. sec plasma - upper null, early disruption ~0.7 sec D-port 0 MW 1.1-1.45 sec E-port 0 MW 1.1-1.45 sec J-port 2 MW until #3 & #4 faulted and #3 screen xbarred 007 fizzle 008 request: Bt~5.2 T, Ip~0.8 MA, upper null D-port 1. MW 1.1-1.45 sec E-port 1. MW 1.1-1.45 sec J-port 2 MW 0.6-1. sec plasma - upper null, H-mode with D and E @2 MW D-port 1 MW 1.1-1.45 sec E-port 1 MW 1.1-1.45 sec J-port 2 MW 0.6-1.0 sec need to retune next shot: inner wall limited008 009 request: Bt~5.2 T, Ip~0.8 MA, inner wall limited D-port 1.25 MW 1.1-1.45 sec E-port 1.25 MW 1.1-1.45 sec J-port 2.5 MW 0.6-1. sec plasma - inner wall limited, early disruption D-port 0 MW 1.1-1.45 sec E-port 0 MW 1.1-1.45 sec J-port MW 0.6-1.0 sec #3 screen xbarred on fault early gap was 2 cm good for loading check as function of gap 010

Physics Operator Summaries

Entered: Jul 7 2004 04:37:12:207PM

Author: To Be Determined

PhysOp Summary for 1001005. Experiments --------------------------- Engineering tests SL: Wolfe/Gwinn MP#268 ICRF SL:Wukitch/Boivin PO: Rowan EO: Dekow Engineering Setup ------------------ We will presumably need PLC test shots for at least the OH and EF1 supplies (separately), since instrumentation has been modified or disturbed on all of these since the last run. We may also need to conduct further tests of the ground fault instrmentation using the hi-pot and ringing supplies. Once we decide to go to plasma shots: Power systems as on 1001003009 Gas System Setup: fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled The following gate valves should be enabled: ECE, VUV, PCX "beast" at B-port RF systems: Complete the checklist and have FMIT#1-4 to run-on by 8:00 am Use match from 1001003009. Initial waveforms from 1001003009: D-port 1.5 MW 1.2-1.45 sec E-port 1.5 MW 0.6-0.85 sec J-port 1.5 MW 0.9-1.15 sec IMPORTANT NEW RESTRICTION FROM WOLFE: -------------------------- Throughout the run, someone (Physop, Eng Op, and/or Session Leader must monitor the OH2L ground resistor voltage (see cmod$models:[engineering.scopes]scope_gf.dat) on every shot. Any significant ( > 300V) signals must be evaluated by gwinn, wolfe, or irby before proceeding. Run Plan -------------------- The run will start with Engineering Tests and these tests will be under the direction of Wolfe, Dekow, and Gwinn. Once tests are completed, plasma operation will proceed with a continuation of the evaluation of the J-port four-strap antenna, as begun on Tuesday. In the event that a significant ground current event is observed, operation may revert to testing, or terminate, as directed by Gwinn and or Wolfe. Goals of the ICRF experiment are: 1. Measure loading as a function of power comparing D, E, and J-port. (1 shot) 2. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots) 3. In L-mode and diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas. (2 shots) 4. Evaluation of maximum reliable power from J-port, and maximum total power from D, E, and J 5. Assuming total achievable power exceeds 3MW, determination of H-mode accessibility for upper-null targets; this will indicate whether we will do reverse the field for next week. Depending on the results of the ICRF evaluation, and on time remaining, we will proceed with either MP#282A (current ramps), MP#248 (H-mode performance at high P_rf). Summary ----------------------- Shots 001 through 006 were engineering test shots and are described in the SL log. For shot 007, the run was returned to physics operation. Shot 1001003009 was loaded prior to shot 001 in preparation for working on MP 268, Conditioning of D-, E-, or J-port ICRF Antenna. Shot 007 was a fizzle. In comparing with the reference shot, the prefill pressure seemed low. The prefill was increased by 2 ms to 24 ms. On this shot, the ground fault was again detected. The remainder of the day was devoted to looking for the problem. See SL log for details. Details of the run ------------------------ PCS started at 8:05. Shot 1001003009 was loaded and coldstart completed by 8:24 PCS started at 8:05 Loaded from 1001003009 Did a Load/Clean Load at 5-Oct-2000 08:19:51.00 Open tree SCRATCH_DISK:[ROWAN] -1 Open tree done Did coldstart . No occurences of err. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 5-OCT-2000 08:24:10.62 doing TCL command TYPE *************** END COLD START ****************** *************** END COLDSTART ****************** 001-006. Engineering test shots. 007. Fizzle 3 amps on OH2_L GF at 0.0197 s to 0.217 s Pressure seems low at approx 0.047 mT Next shot: Increase prefill by 2 ms. This brings the prefill to 24 ms 008-011. Engineering test shots.

Session Leader Comments
Oct 5 2000 09:51:11:797AM	1001005001	Steve Wolfe	shot#1: EF1 test. All bus signals are present and look ok. Note that the ef2u bus voltage signal is (and was previously) inverted. There is a spike on the oh2l ground resistor at .065 sec, amplitude -450V. No associated signals on anything else, except perhaps a .05A glitch on the oh2l gf pearson.
Oct 5 2000 10:08:18:060AM	1001005002	Steve Wolfe	shot#2:repeat EF1 test with oh2 resistor divider shorted; common mode test. noise level is similar with the input shorted. We've bought considerable noise by putting the divider on the wall. Gwinn feels we should concentrate on the gf pearsons, and watch for signals of 1 amp or more, instead of the resistor voltage.
Oct 5 2000 10:53:16:107AM	1001005003	Steve Wolfe	shot#3: ef3 test, jumper on resistor divider removed. clock on machine gf pearsons increased to 3khz (moved to different ddecoder channel, now on ch3) Fizzle detector did not take out the ef3. operator hit the e-stop to turn off the current. It didn't invert at 2sec either. Actually the supply did invert at 3.47sec, probably on the backup timer.
Oct 5 2000 12:04:01:750PM	1001005004	Steve Wolfe	shot 4: Engineers found a bad OR gate in the EF3 control circuit. This will be a no-power test to verify that the fix has worked. That seemed to work. Next shot, another live EF3 test
Oct 5 2000 12:10:27:140PM	1001005005	Steve Wolfe	shot 5: another live EF3 test Ok, fizzle detector took it out, as programmed.
Oct 5 2000 12:18:56:200PM	1001005006	Steve Wolfe	shot 6: oh test. sounded good. There is a single sample spike of 3A on the EF3 gf pearson at -1.090 sec, just after the OH supplies turn on; otherwise less than .5A
Oct 5 2000 12:48:26:873PM	1001005007	Steve Wolfe	shot 7: set up for a plasma shot. Wukitch in charge, until something bad happens. Which it just did. POsitive 3A on the oh2l pearson at .0198-.0215sec; resistor sees +2000V spike followed by +600V flat There is something on the common mode rogowski, but probably pickup. We see spikes on the bus voltage traces for OH1, OH2U, OH2L, EF1L, EF2U, EF2L, maybe EF3. The spike on oh2L is -1500V, OH2U is -400, others are smaller, and OH1 is +500V. There are negative going spikes on several comm resistor signals, including the OH1 COMA; thus at least the spike part of these voltage signals is still unreliable!
Oct 5 2000 01:34:42:153PM	1001005007	Steve Wukitch	007 fizzle 3.4 A square pulse on OH2_L GF Power system group is investigating
Oct 5 2000 03:26:56:933PM	1001005008	Steve Wolfe	shot 8: We are going to investigate the hypothesis that the ground is appearing in the OH2L commutation circuit. This shot will be a "no current" commutation test, i.e. just firing the bank. nothing on the gf signals next shot: 10Ka oh commutaiton test
Oct 5 2000 03:34:17:810PM	1001005009	Steve Wolfe	shot 9: 10Ka oh commutation test No gf currents
Oct 5 2000 03:46:11:373PM	1001005010	Steve Wolfe	shot 10: full current oh commutation test, under hybrid control (normal current program). No gf currents. no spikes
Oct 5 2000 03:57:48:047PM	1001005010	Steve Wolfe	shot 10: full current oh commutation test, under hybrid control (normal current program). No gf currents. no spikes next shot: swap the commutation banks between OH2U and OH2L
Oct 5 2000 04:49:31:200PM	1001005011	Steve Wolfe	shot 11: swap the commutation banks between OH2U and OH2L; this will be a plasma attempt OH2U fuse blown. That was it!. 20A negative gf current in OH2U, goes positice for one sample first.

Physics Operator Comments
Oct 5 2000 08:28:20:153AM		Bill Rowan	#37 of 37 OPS Date: 4-OCT-2000 21:54 Expires: 18-OCT-2000 00:00 From: BAROLO::WOLFE Subj: Setup and run plan for Thursday, Oct 5 Run Plan for Thurs., Oct 5, 2000 Experiments SL ------------- ---- Engineering tests wolfe/Gwinn MP#268 ICRF Wukitch/Boivin PO: Rowan Plan -------------------- The run will start with Engineering Tests and these tests will be under the direction of Wolfe, Dekow, and Gwinn. Once tests are completed, plasma operation will proceed with a continuation of the evaluation of the J-port four-strap antenna, as begun on Tuesday. In the event that a significant ground current event is observed, operation may revert to testing, or terminate, as directed by Gwinn and or Wolfe. Goals of the ICRF experiment are: 1. Measure loading as a function of power comparing D, E, and J-port. (1 shot) 2. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots) 3. In L-mode and diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas. (2 shots) 4. Evaluation of maximum reliable power from J-port, and maximum total power from D, E, and J 5. Assuming total achievable power exceeds 3MW, determination of H-mode accessibility for upper-null targets; this will indicate whether we will do reverse the field for next week. Depending on the results of the ICRF evaluation, and on time remaining, we will proceed with either MP#282A (current ramps), MP#248 (H-mode performance at high P_rf). Engineering Setup ------------------ We will presumably need PLC test shots for at least the OH and EF1 supplies (separately), since instrumentation has been modified or disturbed on all of these since the last run. We may also need to conduct further tests of the ground fault instrmentation using the hi-pot and ringing supplies. Once we decide to go to plasma shots: Power systems as on 1001003009 Gas System Setup: fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled The following gate valves should be enabled: ECE, VUV, PCX "beast" at B-port RF systems: Complete the checklist and have FMIT#1-4 to run-on by 8:00 am Use match from 1001003009. Initial waveforms from 1001003009: D-port 1.5 MW 1.2-1.45 sec E-port 1.5 MW 0.6-0.85 sec J-port 1.5 MW 0.9-1.15 sec _______________________________________________________________________ IMPORTANT NEW RESTRICTION: -------------------------- Throughout the run, someone (Physop, Eng Op, and/or Session Leader must monitor the OH2L ground resistor voltage (see cmod$models:[engineering.scopes]scope_gf.dat) on every shot. Any significant ( > 300V) signals must be evaluated by gwinn, wolfe, or irby before proceeding. This OPERATIONAL RESTRICTION is in force for all runs until further notice. pcs started at 8:05 Loaded from 1001003009 Did a Load/Clean Load at 5-Oct-2000 08:19:51.00 Open tree SCRATCH_DISK:[ROWAN] -1 Open tree done Did coldstart . No occurences of err. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 5-OCT-2000 08:24:10.62 doing TCL command TYPE *************** END COLD START ****************** *************** END COLDSTART ****************** Ready for first plasma shot. Awaiting completion of Engineering Tests
Oct 5 2000 12:24:46:420PM		Bill Rowan	#37 of 37 OPS Date: 4-OCT-2000 21:54 Expires: 18-OCT-2000 00:00 From: BAROLO::WOLFE Subj: Setup and run plan for Thursday, Oct 5 Run Plan for Thurs., Oct 5, 2000 Experiments SL ------------- ---- Engineering tests wolfe/Gwinn MP#268 ICRF Wukitch/Boivin PO: Rowan Plan -------------------- The run will start with Engineering Tests and these tests will be under the direction of Wolfe, Dekow, and Gwinn. Once tests are completed, plasma operation will proceed with a continuation of the evaluation of the J-port four-strap antenna, as begun on Tuesday. In the event that a significant ground current event is observed, operation may revert to testing, or terminate, as directed by Gwinn and or Wolfe. Goals of the ICRF experiment are: 1. Measure loading as a function of power comparing D, E, and J-port. (1 shot) 2. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots) 3. In L-mode and diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas. (2 shots) 4. Evaluation of maximum reliable power from J-port, and maximum total power from D, E, and J 5. Assuming total achievable power exceeds 3MW, determination of H-mode accessibility for upper-null targets; this will indicate whether we will do reverse the field for next week. Depending on the results of the ICRF evaluation, and on time remaining, we will proceed with either MP#282A (current ramps), MP#248 (H-mode performance at high P_rf). Engineering Setup ------------------ We will presumably need PLC test shots for at least the OH and EF1 supplies (separately), since instrumentation has been modified or disturbed on all of these since the last run. We may also need to conduct further tests of the ground fault instrmentation using the hi-pot and ringing supplies. Once we decide to go to plasma shots: Power systems as on 1001003009 Gas System Setup: fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled The following gate valves should be enabled: ECE, VUV, PCX "beast" at B-port RF systems: Complete the checklist and have FMIT#1-4 to run-on by 8:00 am Use match from 1001003009. Initial waveforms from 1001003009: D-port 1.5 MW 1.2-1.45 sec E-port 1.5 MW 0.6-0.85 sec J-port 1.5 MW 0.9-1.15 sec _______________________________________________________________________ IMPORTANT NEW RESTRICTION: -------------------------- Throughout the run, someone (Physop, Eng Op, and/or Session Leader must monitor the OH2L ground resistor voltage (see cmod$models:[engineering.scopes]scope_gf.dat) on every shot. Any significant ( > 300V) signals must be evaluated by gwinn, wolfe, or irby before proceeding. This OPERATIONAL RESTRICTION is in force for all runs until further notice. pcs started at 8:05 Loaded from 1001003009 Did a Load/Clean Load at 5-Oct-2000 08:19:51.00 Open tree SCRATCH_DISK:[ROWAN] -1 Open tree done Did coldstart . No occurences of err. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 5-OCT-2000 08:24:10.62 doing TCL command TYPE *************** END COLD START ****************** *************** END COLDSTART ****************** Ready for first plasma shot. Awaiting completion of Engineering Tests Modification to the procedure for monitoring for the ground fault: Monitor the ground fault current OH2_L GF. Anything over an amp should be evaluated by Gwinn, Wolfe, or Irby. 001-006 were the test shots
Oct 5 2000 12:58:34:187PM	1001005007	Bill Rowan	007. Fizzle 3 amps on OH2_L GF at 0.0197 s to 0.021 s Pressure seems low at approx 0.047 mT Next shot: Increase prefill by 2 ms This brings the prefill to 24 ms
Oct 5 2000 04:33:52:403PM	1001005011	Bill Rowan	?0

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:37:11:763AM	Test	Ok	EF1L and U Test
2	09:56:19:700AM	Test	Ok	EF1L and U Test
3	10:27:09:607AM	Test	Bad	EF3 Test- Supply did not turn off
4	11:58:02:403AM	Test	Ok	EF3 NO Power Test for Invert/Fizzle signal test
5	12:05:44:280PM	Test	Ok	EF3 Power Test
6	12:12:43:327PM	Test	Ok	OH Test
7	12:28:13:483PM	Test	Bad	GF current on OH2L Pearson
8	03:18:09:653PM	Test	Ok	OH2L cap bank dump test only.
9	03:30:14:937PM	Test	Ok	OH Commutation Test
10	03:41:33:390PM	Test	Ok	OH Hybrid Test
11	04:10:10:200PM	Test	Bad	OH2U GF Fuse Blown