Miniproposals

Miniproposal: 268 Date Filed: 4/7/2000 Title: Conditioning of D-, E-, or J-Port ICRF Antenna First Author: Gerd Schilling Session Leader: Steve Wukitch (shots 1-20) Session Leader: John Goetz (shots 21-21)

Engineering Operator Run Comment

MP267--SOL or MP268--ICRF PO:Irby SL:LaBombard or Wukitch EO: Byford,Par

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:25:053PM

Author: To Be Determined

Run 1001011 MP268---ICRF Development SL: Wukitch/Goetz EO: Byford/Parkin PO: Irby Engineering setup: ------------------ Overnight ECDC in D2, stopping 1-2 hours before run. Run begins 9:00 and ends at 17:00 Power System Setup: Same as on 1001006019 Gas 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 Prepare for between shot ECDC The following gate valves should be enabled: the BEAST, ECE, VUV 001 request: D: 1 MW @ 0.6-1.2 sec E: 1 MW @ 0.6-1.2 sec J3: 0.5 MW @ 0.6-1.2 sec J4: 0.5 MW @ 0.6-1.2 sec result: plasma, EDA D: 1 MW clean E: 1 MW clean J: 0.5 MW #3 max faulted by 0.8 sec 0.5 MW #4 max faulted by 0.8 sec next shot: increase power to 1.25 MW on D and E increase power to 1.5 total on J 002 request: D: 1.25 MW @ 0.6-1.2 sec E: 1.25 MW @ 0.6-1.2 sec J3: 0.75 MW @ 0.6-1.2 sec J4: 0.75 MW @ 0.6-1.2 sec result: plasma, EDA, early disruption ~0.8 D: 1.25 MW single fault E: 1.25 MW clean J: 0.75 MW #3 2 faults 0.75 MW #4 2 faults D-port camera indicates injection originated here next shot: increase power to 2 MW total on J 003 no gas 004 no power shot 005 request: D: 1.25 MW @ 0.6-1.2 sec E: 1.25 MW @ 0.6-1.2 sec J3: 1 MW @ 0.6-1.2 sec J4: 1 MW @ 0.6-1.2 sec result: plasma, EDA, early disruption ~0.76 D: 1.25 MW single fault E: 1.25 MW clean J: 1 MW #3 multiple faults 1.2 MW #4 multiple faults 006 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1 MW @ 0.75-1.1 sec with slow ramp J4: 1 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA, early disruption ~1 D:1.25 MW single fault E: 1.25 MW clean J: 1 MW #3 multiple faults 1.2 MW #4 multiple faults 007 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1 MW @ 0.75-1.1 sec with slow ramp J4: 1 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.1 MW D:1. MW clean E: 1. MW clean J: 1 MW #3 clean 1.1 MW #4 one fault good shot next shot: raise J-port power to 2.5 MW 008 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1.15 MW @ 0.75-1.1 sec with slow ramp J4: 1.15 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.1 MW D:1. MW clean E: 1. MW clean J: 1.15 MW #3 2 faults 1.15 MW #4 3 faults next shot: raise J-port power to 2.6 MW 009 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1.3 MW @ 0.75-1.1 sec with slow ramp J4: 1.3 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.4 MW D:1. MW clean E: 1. MW clean J: 1.3 MW #3 1 faults 1.2 MW #4 2 faults next shot: raise J-port power FMIT#4 appears to be having a problem and it appears to have started with shot 007. The forward power from the driver jumps suddenly. Could be something is arcing or the driver is oscillating. The FPA is oscillation monitor does not indicate much oscillation. 010 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1.5 MW @ 0.75-1.1 sec with slow ramp J4: 1.5 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.6 MW D:1. MW clean E: 1. MW clean J: 1.5 MW #3 1 faults 1.1 MW #4 2 faults FMIT#4 appears to be having a problem and it appears to have started with shot 007. The forward power from the driver jumps suddenly. Could be something is arcing or the driver is oscillating. The FPA is oscillation monitor does not indicate much oscillation. next shot: lower J to 2 MW total and raise D and E to 2.5 MW total 011 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1. MW @ 0.75-1.1 sec with slow ramp J4: 1. MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA early disruption 1.1 sec D:1.25 MW clean E: 1.25 MW 3 faults J: 1. MW #3 0 faults 1. MW #4 2 faults no particular correlation of faults to D-alpha oscillation 012 fizzle 013 fizzle 014 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.25 MW @ 0.75-1.1 sec with slow ramp J4: 1.25 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.5 MW D:1.25 MW clean E: 1.25 MW 3 faults J: 1. MW #3 max faults 1. MW #4 max faults next shot: faster ramp this time on J 015 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.25 MW @ 0.75-1.1 sec with faster ramp J4: 1.25 MW @ 0.75-1.1 sec with faster ramp result: plasma, EDA early disruption ~1.07 sec D:1.25 MW clean E: 1.25 MW 1 fault J: 1.2 MW #3 1 fault 1.1 MW #4 1 fault #4 is still saturated - another possibility is a lower drive from the source - ie problematic feedback 016 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.0 MW @ 0.75-1.1 sec J4: 1.0 MW @ 0.75-1.1 sec result: plasma, EDA early disruption ~1.1 sec D:1.3 MW clean E: 1.25 MW clean J3:1.0 MW clean J4:1.0 MW 5 faults interesting partial sawtooth crashes at ~0.99 sec and ~1.06 sec Dalpha oscillations correlate with J4 faulting at 0.8 and 0.91 sec from the fast monitor 7312 there are some downward power spikes before the fault but there are no precursors prior to 0.8 sec 017 request: Ip=1 MA D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.0 MW @ 0.75-1.1 sec J4: 1.0 MW @ 0.75-1.1 sec result: plasma, EDA then out of H-mode D:1.3 MW 2 faults E: 1.25 MW 3 faults J: max faults on #4 #4 suggests a severe change in tune while #3 does not? make change on #3 and #4 according to suggestions 018 request: 1 MA plasma current D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.0 MW @ 0.75-1.1 sec J4: 1.0 MW @ 0.75-1.1 sec result: plasma, EDA then out of H-mode D:1.3 MW 2 faults E:1.25 MW 3 faults J: max faults on #4 019 request: tune up #4 some more D: 1.15 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: .25-1.0 MW @ 0.75-1.1 sec J4: .25-1.0 MW @ 0.75-1.1 sec result: plasma, EDA then out of H-mode D:1.2 MW 1 fault E: 1.3 MW 2 faults J: max faults on #4 020 request: tune up #4 some more D: 1.15 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: add 50kW front porch, then .25-1.0 MW @ 0.75-1.1 sec J4: add 50kW front porch, then .25-1.0 MW @ 0.75-1.1 sec result: plasma, EDA then early disruption @ 1.02s D:1.2 MW no faults E:1.3 MW no faults J:J3 ran fine; no faults J4 had no faults; but now the transmitter is rolling over at 0.5MW 021 request: tune up #4 some more; there is still 30% reflected power D: 1.15 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: add 50kW front porch, then 1.0 MW @ 0.8-1.1 sec J4: add 50kW front porch, then 1.0 MW @ 0.8-1.1 sec result: plasma, EDA; 190kJ; 3.9keV D:1.25 MW no faults E: 1.3 MW no faults J: J3 ran fine; no faults J4 had eight faults and put out 1MW forward Summary: We successfully coupled ~4.5 MW to H-mode plasmas. We also made a comparison of D, E and J-port separately in H-mode. The fault protection circuitry was properly faulting both transmitters when one had an arc indication. We were limited in power because FMIT#4 gain appeared to decrease compared previous operation (only 1.4 MW into dummy load). We suspect a lower stage is oscillating resulting in a decrease in gain. The IPA tube is known to be prone to oscillate. We will investigate this on the next maintenance day.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:12:240PM

Author: To Be Determined

Run 1001011 MP268---ICRF Development SL: Wukitch/Goetz EO: Byford/Parkin PO: Irby Engineering setup: ------------------ Overnight ECDC in D2, stopping 1-2 hours before run. Run begins 9:00 and ends at 17:00 Power System Setup: Same as on 1001006019 Gas 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 Prepare for between shot ECDC The following gate valves should be enabled: the BEAST, ECE, VUV Summary To try and maintain a good H/D during the run we ran 10 minutes of ECDC between shots from the beginning of the run. We seemed to be able to maintain about a 7% to 9% level most of the day. However, near the end of the day, and after going to 1 MA Ip, the H/D worked its way up to 12% or so during RF. Around shot 7 we raised ZXL .4 cm to get the plasma off the inner divertor floor. This change may have helped with the disruptions. The RF group was able to consistently deliver 4 MW of power today until we raised the plasma current to 1 MA. Several shots were then required to retune the #3 and #4 transmitters. The last shot of the day, 21, had some short bursts of power up to the 4 MW level and gave us 190 kJ of stored energy. Still no records... Problems We lost one shot because of a gas system fault. No enable signal got to the gas system from the hybrid event though it was generated by the hybrid. We took a no power test, got gas, and then got a plasma on the next try. Br0 drifted around on shots 12 and 13 and caused a couple of fizzles. About 1kA of extra OH2L current was seen at t=0. Also noted a 2.5 kA positive current in OH2U at t=-1.1 s. The Power Group has been asked to look into this problem, and will do some sine/cosine board tests in the morning before the run. RF group had some problems today getting #4 power beyond 1 MW. Seems to be either a control or tuning problem. Score plasmas : 17 fizzles : 02 --- OH2U or OH2L problem duds : 01 --- no gas tests : 01 Details ---------------------------------------------------------------------------- 1001011xxx irby PHYSICS_OPERATOR Oct 11 2000 7:49:07:890AM . . . . . . . . . . . . . . . . . . . . Settings from last Friday: pg at 22 ms Br0 at +.0015 T Ip 800 kA EF4 -1290 A NL04 8e19 m^3 Did Coldstart: % Compiled module: R_UPLOAD. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 11-OCT-2000 07:31:53.84 ---------------------------------------------------------------------------- 1001011001 irby DISCHARGE_CLEAN Oct 11 2000 9:22:07:903AM . . . . . . . . . . . . . . . . . . . . Loaded 1001006019 just to be certain... Base pressure 5.6e-7 Torr before first shot Plasma: Nice H-mode, 111 kJ ECDC in D2 started between shots Startup looks okay... ---------------------------------------------------------------------------- 1001011002 irby PHYSICS_OPERATOR Oct 11 2000 9:52:14:310AM . . . . . . . . . . . . . . . . . . . . Plasma to .808 s, 149 kJ, 4.1 useful MWs RF!, H/D 6% pressure a little high: ECDC --- wait a little longer after ECDC goes off Continue ECDC between shots though no sign H/D was down... ---------------------------------------------------------------------------- 1001011003 irby PHYSICS_OPERATOR Oct 11 2000 10:10:49:716AM . . . . . . . . . . . . . . . . . . . . PCS repeat Argon enabled Pressure a little lower before shot this time: 4.5e-6 Torr No gas!! Everything enabled, hybrid signal was okay, but no pulses from gas system. No trigger for some of the gas modules ---------------------------------------------------------------------------- 1001011004 irby PHYSICS_OPERATOR Oct 11 2000 10:18:02:403AM . . . . . . . . . . . . . . . . . . . . This shot will be a no power shot to test gas system Got gas... Now try a plasma shot again.. ---------------------------------------------------------------------------- 1001011005 irby PHYSICS_OPERATOR Oct 11 2000 10:46:00:106AM . . . . . . . . . . . . . . . . . . . . Try for gas and plasma BP 2.0e-6 Torr Plasma for 0.77 s, 145 kJ 4.5 MW of RF briefly Continue ECDC between shots Startup okay. ---------------------------------------------------------------------------- 1001011006 irby PHYSICS_OPERATOR Oct 11 2000 11:07:12:356AM . . . . . . . . . . . . . . . . . . . . Steve has programmed j-port to ramp up after D&E. Plasma to 1.0 s, 160 kJ, may have been caused by D-port Pressure getting high --- wait a little longer ---------------------------------------------------------------------------- 1001011007 irby PHYSICS_OPERATOR Oct 11 2000 11:31:23:546AM . . . . . . . . . . . . . . . . . . . . Changed Rogowski dig_freq to 2000 Hz from 1500 --- fix store problem Steve W notes that we are well down into the inner divertor floor and recommends raising the x-point: ZXL was ramping down to -.014 cm now ramping down to -.01 cm after 0.6 s. FORGOT to LOAD IT. BP 5.8e-6 Torr Plasma to rampdown, 151 kJ, 4.2 MW, H/D holding steady at about 7% at 1 s ---------------------------------------------------------------------------- 1001011008 irby PHYSICS_OPERATOR Oct 11 2000 11:56:10:170AM . . . . . . . . . . . . . . . . . . . . Plasma into rampdown, 148 kJ, H/D 7% at 1s pressure a little high, but it ran... ---------------------------------------------------------------------------- 1001011009 irby PHYSICS_OPERATOR Oct 11 2000 12:17:01:640PM . . . . . . . . . . . . . . . . . . . . Decided to drop gp from 22 to 21 ms after all. Plasma to rampdown, 156 kJ, 4.4 MW, neuts 4.e13, 7% H/D startup not too bad ---------------------------------------------------------------------------- 1001011010 irby PHYSICS_OPERATOR Oct 11 2000 12:56:40:216PM . . . . . . . . . . . . . . . . . . . . Plasma to rampdown, 146 kJ, 4.8 MW briefly, 7.8 H/D at 1s ---------------------------------------------------------------------------- 1001011011 irby PHYSICS_OPERATOR Oct 11 2000 1:19:05:543PM . . . . . . . . . . . . . . . . . . . . Plasma for 1.1 s, 146 kJ, 6.6% H/D ---------------------------------------------------------------------------- 1001011012 irby PHYSICS_OPERATOR Oct 11 2000 1:31:43:500PM . . . . . . . . . . . . . . . . . . . . fizzle! .5 mT positive jump in Br0 at 5 ms Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -10.7782 -26.3658 -18.5833 dIp/dt (kA/ms): -1.1423 -2.7999 -2.5455 -0.0022 pressure (mTorr): 0.0643 0.0650 0.0621 0.0594 Bz0 (mT): -3.3309 -1.2472 0.7668 16.7760 Br0 (mT): -0.7057 -0.5439 -1.5318 -1.7348 ---------------------------------------------------------------------------- 1001011013 irby PHYSICS_OPERATOR Oct 11 2000 2:02:15:090PM . . . . . . . . . . . . . . . . . . . . Fizzle! Br0 -3 mT !! ---------------------------------------------------------------------------- 1001011014 irby PHYSICS_OPERATOR Oct 11 2000 2:39:24:043PM . . . . . . . . . . . . . . . . . . . . Put Br0 back to +0.0015 mT and try again -- too much current on OH2L by about 1kA, but no clear reason why. Plasma to rampdown, 153 kJ, H/D 8.5% ---------------------------------------------------------------------------- 1001011015 irby PHYSICS_OPERATOR Oct 11 2000 3:06:12:293PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.06 s, 147 kJ, 4.85 MW, 2Pi diode at 2 MW, 8.9% H/D at 1.0s RF having some problems with feedback control on #4. SW and JG go to cell. ---------------------------------------------------------------------------- 1001011016 irby PHYSICS_OPERATOR Oct 11 2000 3:34:01:686PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.1 s, H/D 8% at 1 s, 169 kJ ---------------------------------------------------------------------------- 1001011017 irby PHYSICS_OPERATOR Oct 11 2000 3:50:44:436PM . . . . . . . . . . . . . . . . . . . . Ip to 1 MA from 0.8 MA RF group still having problems with getting beyond 1 MW on #4. Will take 2 MW total j, and as much as possible from D&E. Should manage better than 4 MW total. BP 5.5e-6 Torr at init Plasma to rampdown, 1 MA Ip, but j-port out of tune, only 2 MW RF Ip had a little trouble at 0.4 s, OH1 crossover. ---------------------------------------------------------------------------- 1001011018 irby PHYSICS_OPERATOR Oct 11 2000 4:14:21:500PM . . . . . . . . . . . . . . . . . . . . Made small tweak in Ip programming to bring up current a little faster before t=0.4 s. Plasma to rampdown, 148 kJ, no j-port ---------------------------------------------------------------------------- 1001011019 irby PHYSICS_OPERATOR Oct 11 2000 4:43:48:780PM . . . . . . . . . . . . . . . . . . . . BP at init 8.7e-6 Torr Plasma to rampdown, JG says j-port tuning a little better, 150 kJ ---------------------------------------------------------------------------- 1001011020 irby PHYSICS_OPERATOR Oct 11 2000 5:14:02:890PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.02 s, 172 kJ, j-port much better before brick ended plasma H/D 10 or 11% ---------------------------------------------------------------------------- 1001011021 irby PHYSICS_OPERATOR Oct 11 2000 5:31:07:170PM . . . . . . . . . . . . . . . . . . . . Plasma to rampdown, 190 kJ, j-port ran but with many faults, RF power more than 4 MW briefly.

Session Leader Comments
Oct 11 2000 09:35:55:293AM	1001011001	Steve Wukitch	001 request: D: 1 MW @ 0.6-1.2 sec E: 1 MW @ 0.6-1.2 sec J3: 0.5 MW @ 0.6-1.2 sec J4: 0.5 MW @ 0.6-1.2 sec result: plasma, EDA D: 1 MW clean E: 1 MW clean J: 0.5 MW #3 max faulted by 0.8 sec 0.5 MW #4 max faulted by 0.8 sec next shot: increase power to 1.25 MW on D and E increase power to 1.5 total on J
Oct 11 2000 10:05:46:187AM	1001011002	Steve Wukitch	002 request: D: 1.25 MW @ 0.6-1.2 sec E: 1.25 MW @ 0.6-1.2 sec J3: 0.75 MW @ 0.6-1.2 sec J4: 0.75 MW @ 0.6-1.2 sec result: plasma, EDA, early disruption ~0.8 D: 1.25 MW single fault E: 1.25 MW clean J: 0.75 MW #3 2 faults 0.75 MW #4 2 faults D-port camera indicates injection originated here next shot: increase power to 2 MW total on J
Oct 11 2000 10:09:05:593AM	1001011003	Steve Wukitch	003 no gas
Oct 11 2000 10:41:35:280AM	1001011004	Steve Wukitch	004 no power
Oct 11 2000 10:43:36:500AM	1001011005	Steve Wukitch	005 request: D: 1.25 MW @ 0.6-1.2 sec E: 1.25 MW @ 0.6-1.2 sec J3: 1 MW @ 0.6-1.2 sec J4: 1 MW @ 0.6-1.2 sec result: plasma, EDA, early disruption ~0.76 D: 1.25 MW single fault E: 1.25 MW clean J: 1 MW #3 multiple faults 1.2 MW #4 multiple faults
Oct 11 2000 11:06:52:043AM	1001011006	Steve Wukitch	006 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1 MW @ 0.75-1.1 sec with slow ramp J4: 1 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA, early disruption ~1 D:1.25 MW single fault E: 1.25 MW clean J: 1 MW #3 multiple faults 1.2 MW #4 multiple faults
Oct 11 2000 11:25:09:420AM	1001011007	Steve Wukitch	007 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1 MW @ 0.75-1.1 sec with slow ramp J4: 1 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.1 MW D:1. MW clean E: 1. MW clean J: 1 MW #3 clean 1.1 MW #4 one fault good shot next shot: raise J-port power to 2.5 MW
Oct 11 2000 11:56:00:780AM	1001011008	Steve Wukitch	008 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1.15 MW @ 0.75-1.1 sec with slow ramp J4: 1.15 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.1 MW D:1. MW clean E: 1. MW clean J: 1.15 MW #3 2 faults 1.15 MW #4 3 faults good shot next shot: raise J-port power to 2.6 MW
Oct 11 2000 12:27:03:747PM	1001011009	Steve Wukitch	009 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1.3 MW @ 0.75-1.1 sec with slow ramp J4: 1.3 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.4 MW D:1. MW clean E: 1. MW clean J: 1.3 MW #3 1 faults 1.2 MW #4 2 faults next shot: raise J-port power
Oct 11 2000 01:00:16:123PM	1001011010	Steve Wukitch	010 request: D: 1. MW @ 0.6-1.1 sec E: 1. MW @ 0.6-1.1 sec J3: 1.5 MW @ 0.75-1.1 sec with slow ramp J4: 1.5 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.6 MW D:1. MW clean E: 1. MW clean J: 1.5 MW #3 1 faults 1.1 MW #4 2 faults FMIT#4 appears to be having a problem and it appears to have started with shot 007. The forward power from the driver jumps suddenly. Could be something is arcing or the driver is oscillating. The FPA is oscillation monitor does not indicate much oscillation. next shot: lower J to 2 MW total and raise D and E to 2.5 MW total
Oct 11 2000 02:45:33:437PM	1001011014	Steve Wukitch	014 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.25 MW @ 0.75-1.1 sec with slow ramp J4: 1.25 MW @ 0.75-1.1 sec with slow ramp result: plasma, EDA 4.5 MW D:1.25 MW clean E: 1.25 MW 3 faults J: 1. MW #3 max faults 1. MW #4 max faults next shot: faster ramp this time on J
Oct 11 2000 03:54:45:950PM	1001011015	Steve Wukitch	015 request: D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.25 MW @ 0.75-1.1 sec with faster ramp J4: 1.25 MW @ 0.75-1.1 sec with faster ramp result: plasma, EDA early disruption ~1.07 sec D:1.25 MW clean E: 1.25 MW 1 fault J: 1.2 MW #3 1 fault 1.1 MW #4 1 fault #4 is still saturated - another possibility is a lower drive from the source - ie problematic feedback
Oct 11 2000 04:13:11:060PM	1001011018	John Goetz	018 request: 1 MA plasma current D: 1.25 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: 1.0 MW @ 0.75-1.1 sec J4: 1.0 MW @ 0.75-1.1 sec result: plasma, EDA then out of H-mode D:1.3 MW 2 faults E: 1.25 MW 3 faults J: max faults on #4
Oct 11 2000 04:35:30:797PM	1001011019	John Goetz	019 request: tune up #4 some more D: 1.15 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: .25-1.0 MW @ 0.75-1.1 sec J4: .25-1.0 MW @ 0.75-1.1 sec result: plasma, EDA then out of H-mode D:1.2 MW 1 fault E: 1.3 MW 2 faults J: max faults on #4
Oct 11 2000 05:00:52:420PM	1001011020	John Goetz	020 request: tune up #4 some more D: 1.15 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: add 50kW front porch, then .25-1.0 MW @ 0.75-1.1 sec J4: add 50kW front porch, then .25-1.0 MW @ 0.75-1.1 sec result: plasma, EDA then early disruption @ 1.02s D:1.2 MW no faults E: 1.3 MW no faults J: J3 ran fine; no faults J4 had no faults; but now the transmitter is rolling over at 0.5MW
Oct 11 2000 05:28:47:827PM	1001011021	John Goetz	021 request: tune up #4 some more; there is still 30% reflected power D: 1.15 MW @ 0.6-1.1 sec E: 1.25 MW @ 0.6-1.1 sec J3: add 50kW front porch, then 1.0 MW @ 0.8-1.1 sec J4: add 50kW front porch, then 1.0 MW @ 0.8-1.1 sec result: plasma, EDA; 190kJ; 3.9keV D:1.25 MW no faults E: 1.3 MW no faults J: J3 ran fine; no faults J4 had eight faults and put out 1MW forward

Physics Operator Comments
Oct 11 2000 07:49:07:890AM		Jim Irby	Settings from last Friday: pg at 22 ms Br0 at +.0015 T Ip 800 kA EF4 -1290 A NL04 8e19 m^3 Did Coldstart: % Compiled module: R_UPLOAD. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 11-OCT-2000 07:31:53.84
Oct 11 2000 09:52:14:310AM	1001011002	Jim Irby	Plasma to .808 s, 149 kJ, 4.1 useful MWs RF!, H/D 6% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4242 -10.7782 -21.1548 -83.4373 dIp/dt (kA/ms): -1.1445 -2.1596 -2.7998 -5.5964 pressure (mTorr): 0.0650 0.0672 0.0650 0.0657 Bz0 (mT): -4.4525 -1.5290 0.0132 19.4125 Br0 (mT): -0.6938 -1.3187 -0.8408 -2.4572 pressure a little high: ECDC --- wait a little longer after ECDC goes off Continue ECDC between shots though no sign H/D was down...
Oct 11 2000 10:10:49:717AM	1001011003	Jim Irby	PCS repeat Argon enabled Pressure a little lower before shot this time: 4.5e-6 Torr No gas!! Everything enabled, hybrid signal was okay, but no pulses from gas system. No trigger for some of the gas modules
Oct 11 2000 10:18:02:403AM	1001011004	Jim Irby	This shot will be a no power shot to test gas system Got gas... Now try a plasma shot again..
Oct 11 2000 10:46:00:107AM	1001011005	Jim Irby	Try for gas and plasma BP 2.0e-6 Torr Plasma for 0.77 s, 145 kJ 4.5 MW of RF briefly Continue ECDC between shots Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -10.8009 -28.9373 -101.5964 dIp/dt (kA/ms): -1.4011 -3.0520 -3.4323 -6.6126 pressure (mTorr): 0.0562 0.0574 0.0549 0.0543 Bz0 (mT): -2.5142 -0.4219 1.2681 21.4782 Br0 (mT): -0.6038 -1.3221 -1.3322 -2.4015 Startup okay.
Oct 11 2000 11:07:12:357AM	1001011006	Jim Irby	Steve has programmed j-port to ramp up after D&E. Plasma to 1.0 s, 160 kJ, may have been caused by D-port Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4015 -10.7782 -26.3658 -91.2198 dIp/dt (kA/ms): -1.1433 -2.5455 -2.7998 -5.7235 pressure (mTorr): 0.0680 0.0703 0.0672 0.0665 Bz0 (mT): -3.8075 -2.1912 0.1570 19.7172 Br0 (mT): -0.5169 -0.9918 -1.4764 -2.5279 Pressure getting high --- wait a little longer
Oct 11 2000 11:31:23:547AM	1001011007	Jim Irby	Changed Rogowski dig_freq to 2000 Hz from 1500 --- fix store problem Steve W notes that we are well down into the inner divertor floor and recommends raising the x-point: ZXL was ramping down to -.014 cm now ramping down to -.01 cm after 0.6 s. FORGOT to LOAD IT. BP 5.8e-6 Torr Plasma to rampdown, 151 kJ, 4.2 MW, H/D holding steady at about 7% at 1 s
Oct 11 2000 11:56:10:170AM	1001011008	Jim Irby	Plasma into rampdown, 148 kJ, H/D 7% at 1s Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4015 -13.3950 -26.3658 -91.2198 dIp/dt (kA/ms): -1.3988 -2.9270 -2.9270 -5.7246 pressure (mTorr): 0.0695 0.0703 0.0672 0.0657 Bz0 (mT): -3.0167 -0.5366 0.6355 19.6408 Br0 (mT): -0.2009 -0.7200 -1.0956 -2.3345 pressure a little high, but it ran...
Oct 11 2000 12:17:01:640PM	1001011009	Jim Irby	Decided to drop gp from 22 to 21 ms after all. Plasma to rampdown, 156 kJ, 4.4 MW, neuts 4.e13, 7% H/D Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -13.3723 -28.9600 -104.1906 dIp/dt (kA/ms): -1.5260 -3.1813 -3.4345 -5.8518 pressure (mTorr): 0.0643 0.0657 0.0628 0.0614 Bz0 (mT): -2.4915 -0.4335 0.7834 20.6903 Br0 (mT): -0.4500 -0.6837 -1.2455 -2.8288 startup not too bad
Oct 11 2000 12:56:40:217PM	1001011010	Jim Irby	Plasma to rampdown, 146 kJ, 4.8 MW briefly, 7.8 H/D at 1s
Oct 11 2000 01:19:05:543PM	1001011011	Jim Irby	Plasma for 1.1 s, 146 kJ, 6.6% H/D
Oct 11 2000 01:31:43:500PM	1001011012	Jim Irby	fizzle! .5 mT positive jump in Br0 at 5 ms Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -10.7782 -26.3658 -18.5833 dIp/dt (kA/ms): -1.1423 -2.7999 -2.5455 -0.0022 pressure (mTorr): 0.0643 0.0650 0.0621 0.0594 Bz0 (mT): -3.3309 -1.2472 0.7668 16.7760 Br0 (mT): -0.7057 -0.5439 -1.5318 -1.7348
Oct 11 2000 02:02:15:090PM	1001011013	Jim Irby	Fizzle! Br0 -3 mT !!
Oct 11 2000 02:39:24:043PM	1001011014	Jim Irby	Put Br0 back to +0.0015 mT and try again -- too much current on OH2L by about 1kA, but no clear reason why. Plasma to rampdown, 153 kJ, H/D 8.5%
Oct 11 2000 03:06:12:293PM	1001011015	Jim Irby	Plasma to 1.06 s, 147 kJ, 4.85 MW, 2Pi diode at 2 MW, 8.9% H/D at 1.0s RF having some problems with feedback control on #4. SW and JG go to cell.
Oct 11 2000 03:34:01:687PM	1001011016	Jim Irby	Plasma to 1.1 s, H/D 8% at 1 s, 169 kJ
Oct 11 2000 03:50:44:437PM	1001011017	Jim Irby	Ip to 1 MA from 0.8 MA RF group still having problems with getting beyond 1 MW on #4. Will take 2 MW total j, and as much as possible from D&E. Should manage better than 4 MW total. BP 5.5e-6 Torr at init Plasma to rampdown, 1 MA Ip, but j-port out of tune, only 2 MW RF Ip had a little trouble at 0.4 s, OH1 crossover.
Oct 11 2000 04:14:21:500PM	1001011018	Jim Irby	Made small tweak in Ip programming to bring up current a little faster before t=0.4 s. Plasma to rampdown, 148 kJ, no j-port
Oct 11 2000 04:43:48:780PM	1001011019	Jim Irby	BP at init 8.7e-6 Torr Plasma to rampdown, JG says j-port tuning a little better, 150 kJ
Oct 11 2000 05:14:02:890PM	1001011020	Jim Irby	Plasma to 1.02 s, 172 kJ, j-port much better before brick ended plasma H/D 10 or 11%
Oct 11 2000 05:31:07:170PM	1001011021	Jim Irby	Plasma to rampdown, 190 kJ, j-port ran but with many faults, RF power more than 4 MW briefly.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:10:04:357AM	Plasma	Ok
2	09:34:05:153AM	Plasma	Ok
3	10:01:33:357AM	Plasma	Ok
4	10:15:31:590AM	Test	Ok
5	10:27:27:107AM	Plasma	Ok
6	10:50:25:577AM	Plasma	Ok
7	11:16:11:107AM	Plasma	Ok
8	11:39:29:857AM	Plasma	Ok
9	12:04:58:450PM	Plasma	Ok
10	12:30:02:700PM	Plasma	Ok
11	12:54:35:420PM	Plasma	Ok
12	01:20:44:950PM	Plasma	Ok
13	01:38:39:980PM	Plasma	Ok
14	02:11:27:013PM	Plasma	Ok
15	02:34:47:077PM	Plasma	Ok
16	03:09:43:390PM	Plasma	Ok
17	03:38:46:607PM	Plasma	Ok
18	04:03:14:437PM	Plasma	Ok
19	04:25:19:450PM	Plasma	Ok
20	04:48:49:640PM	Plasma	Ok
21	05:13:15:590PM	Plasma	Ok