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)

Engineering Operator Run Comment

MP268 ICRF Development MP282A PO:Irby SL:Wukitch/Mossessian EO:Fitzgeral

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:24:960PM

Author: To Be Determined

Engineering Setup for Friday, 29 September, Run 1000929 MP268 ICRF Development MP282A Current Ramps/Peeling Mode (assumimg Prf > 3MW) First part of run will be devoted to getting j-port operational. After we complete j-port tests, and assuming we can get a total useful power of >= 3 MW, we will begin MP282A. SL: Wukitch/Mossessian 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 1000928001 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 The following gate valves should be enabled: ECE, VUV The principal objectives for the RF portion of the run are: ------------------------------------------------------------- 1. Verify J-port operational capability into plasma. (5 shots) 2. Measure loading as a function of power comparing D, E, and J-port. (1 shot) 3. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots) 4. In diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas. (2 shots) --------------------------------------------------------------- 001 D: 0.5 MW from 1.1 - 1.45 sec E: 0.5 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec J-port phase [0,pi,0,pi] plasma D and E did not run because the sources were off J3: ran but poorly tuned J4: ran but poorly tuned nasty injection (moly) ugly sparc from J at ~0.92 sec phase was [0,pi/2,0,pi/2] next shot: power test 002 scanner test 003 50 kA TF test 004 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec J-port phase [0,pi,0,pi] plasma 1.5 MW total from D and E J3: ran to 0.5 MW J4: failed phase was [0,pi/2,0,pi/2] phase feedback does not appear to be working 005 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec plasma 1.5 MW total from D and E J3: ran to 0.5 MW J4: failed phase feedback is oscillating 006 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec plasma 1.5 MW total from D and E J3: ran to 0.5 MW J4: ran to 0.5 MW phase feedback is oscillating Changed the phase feedback to narrowband from wide band 007 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec Changed the phase feedback to narrowband from wideband plasma 1.5 MW total from D and E J3: failed J4: 0.02-0.75 MW from 0.5- 1.0 sec 008 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec plasma 1.5 MW total from D and E J3: .1-0.75 MW with max faults at the end of pulse J4: .1-0.75 MW with max faults 009 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec plasma early disruption - injection from J-port? 1.5 MW total from D and E J3: .1-0.75 MW with max faults at the end of pulse J4: .1-0.75 MW with max faults phase feedback is oscillating?! 010 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec plasma early disruption - injection from J-port? 1.5 MW total from D and E J3: .1-0.75 MW with max faults at the end of pulse J4: .1-0.75 MW with max faults phase feedback is oscillating?! 011 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.02-0.5 MW from 0.5- 1.0 sec plasma EDA with D and E 1.5 MW total from D and E J3: .1-0.5 MW with single fault J4: .1-0.5 MW with max faults at end injection with J-port 012 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.02-0.5 MW from 0.5- 1.0 sec phase feedback inputs were swapped plasma early disruption when J reaches 1 MW total 1.5 MW total from D and E J3: .1-0.5 MW with single fault J4: .1-0.5 MW with max faults at end there is no heating associated with J-port there is activity from the corners and center face tiles phase is [0,0,0,0] 013 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec change phase by 180 plasma EDA with both J and D+E 1.5 MW total from D and E J3: .1-0.5 MW J4: .1-0.5 MW with max faults at end there is an EDA associated with J-port there is NO activity from the J-port 014 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec upper x-point and 5.1 T plasma EDA with both J and D+E 1.5 MW total from D and E J3: .1-0.75 MW - screen xbarred J4: .1-0.75 MW J-port heating was effective 015 OH2L ground fault indication 016 OH test 017 TF test at 50 kA 018 request D: 0.5-0.75 MW from 1.1 - 1.5 sec E: 0.5-0.75 MW from 1.1-1.5 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.6- 1.0 sec upper x-point and 5.2 T plasma 1.5 MW total from D and E 1.5 MW total from J J-port heating was more effective than D-E; more neutrons, more stored energy, more Te(0) 019 request D: 0.5-1. 0MW from 1.1 - 1.5 sec E: 0.5-1.0 MW from 1.1-1.5 sec J3: 0.1-1.0 MW from 0.6- 1.0 sec J4: 0.02-1.0 MW from 0.6- 1.0 sec reload shot 1000929013 - a lower null plasma early disruption J3 had a screen crowbar - seems to be associated with the beginnings of the disruption J4 faulted from the beginning big glow on the upper H-port side of the antenna causes a whole lot of nasty stuff next shot: try giving J4 a 50ms head-start Summary: At long last J-port produced positive results as a 4-strap antenna (1000929018). For 1000929018, J-port heats effectively as D and E-port with no major impurity injections. There appear to be differences between J and D&E in terms of central electron heating and neutron production for 1.5 MW. Before leaping to conclusions, first we would like to verify the injected power measurements by the power meters (data is available for these discharges). If there is still a remarkable difference, we can do further experiments to estimate the absorbed power efficiency, compare D and E separately to J-port (power density), and vary the J-port antenna phasing to match D and E spectrum. Two operational issues we should pursue are the perhaps spurious screen xbars and faulting both transmitters when one fault is received. The latter may be necessary because if one transmitter faults the remaining active straps are in-phase. We have demonstrated this to be an undesirable antenna phasing. We could also re-arrange the transmission lines to allow half the antenna to be run without resulting in a poor antenna phasing.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:12:177PM

Author: To Be Determined

Engineering Setup for Friday, 29 September, Run 1000929 MP268 ICRF Development MP282A Current Ramps/Peeling Mode (assumimg Prf > 3MW) First part of run will be devoted to getting j-port operational. After we complete j-port tests, and assuming we can get a total useful power of >= 3 MW, we will begin MP282A. SL: Wukitch/Mossessian EO: Fitzgerald/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 1000928001 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 The following gate valves should be enabled: ECE, VUV Results: J-port as a 4-strap, heated as well as D and E during L-mode for the first time today (shot 18 for example). J-port was also able to produce h-modes during lower diverted operation. I'm sure the run summary will discuss this great result in detail. We were not able to get more H-mode shots with both j3 and j4 going before we had to shut down to investigate a ground fault. We will continue work on this problem on Monday. Startup was 100% today. Problems: One no_power, and two TF only tests were required today to check out the TF tap scanner and test the TF supply after checking the fuses following shot 15. An OH test was run successfully following the ground fault indication on shot 15. Score: plasmas 14 fizzles 00 duds 00 tests 04 power faults 02 shot cycles 20 Some details: ---------------------------------------------------------------------------- 1000929001 irby PHYSICS_OPERATOR Sep 29 2000 9:18:29:903AM . . . . . . . . . . . . . . . . . . . . Plasma into rampdown FMIT 3 and 4 on line ---- h-mode large injection during rf, probably from the top middle of the antenna H/D 3 to 5% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2154 -10.7554 -23.7262 -104.1679 dIp/dt (kA/ms): -1.0173 -2.4172 -3.6900 -5.9790 pressure (mTorr): 0.0628 0.0621 0.0614 0.0621 Bz0 (mT): -3.2788 -1.6726 0.5069 21.2920 Br0 (mT): -1.0343 -0.8859 -1.0391 -3.3553 ---------------------------------------------------------------------------- 1000929002 irby PHYSICS_OPERATOR Sep 29 2000 9:31:12:136AM . . . . . . . . . . . . . . . . . . . . No Power test to check TF tap scanner Still have glitches on upper and inner taps ---------------------------------------------------------------------------- 1000929003 irby PHYSICS_OPERATOR Sep 29 2000 9:43:59:420AM . . . . . . . . . . . . . . . . . . . . 50 kA TF test Glitch gone on scanner ---------------------------------------------------------------------------- 1000929004 irby PHYSICS_OPERATOR Sep 29 2000 10:01:28:326AM . . . . . . . . . . . . . . . . . . . . Try for plasma Plasma to rampdown D&E are running --- injection right before h-mode H/D up to 7% during rf ---------------------------------------------------------------------------- 1000929005 irby PHYSICS_OPERATOR Sep 29 2000 10:12:13:076AM . . . . . . . . . . . . . . . . . . . . PCS repeat Plasma to rampdown Nice EDA h-mode --- 75 kJ Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.3788 -10.7554 -23.7262 -91.1971 dIp/dt (kA/ms): -1.2739 -2.5433 -2.9248 -5.7224 pressure (mTorr): 0.0657 0.0672 0.0672 0.0672 Bz0 (mT): -2.9686 -0.8011 0.0264 19.6330 Br0 (mT): -0.9121 -1.2421 -0.9065 -3.1574 pressure has been going up Bz0 just took a jog up by .5 mT Current rise a little slower ---------------------------------------------------------------------------- 1000929006 irby PHYSICS_OPERATOR Sep 29 2000 10:25:26:046AM . . . . . . . . . . . . . . . . . . . . Reduced pre-puff from 23 to 21 ms Argon enabled for John Plasma to rampdown --- good h-mode, 75 kJ, 1.5 MW of RF from D&E Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2154 -13.3496 -26.3204 -104.1452 dIp/dt (kA/ms): -1.3988 -2.9259 -3.0519 -5.8507 pressure (mTorr): 0.0628 0.0614 0.0650 0.0628 Bz0 (mT): -3.3210 -0.6083 0.4054 20.7979 Br0 (mT): -0.9450 -1.2865 -1.0237 -3.4615 pressure down a little Bz0 continues to rise Current rise better ---------------------------------------------------------------------------- 1000929007 irby PHYSICS_OPERATOR Sep 29 2000 10:44:05:716AM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma to 1.17 s --- Looks like D or E did us in, not j Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2154 -13.3496 -26.3204 -96.3854 dIp/dt (kA/ms): -1.3999 -2.9248 -2.7988 -5.8485 pressure (mTorr): 0.0657 0.0628 0.0628 0.0636 Bz0 (mT): -3.3765 -1.3212 0.7427 21.2542 Br0 (mT): -1.1961 -1.2284 -0.9503 -2.9496 Bz0 back down Pressure up a little Current rise okay ---------------------------------------------------------------------------- 1000929008 irby PHYSICS_OPERATOR Sep 29 2000 11:07:13:140AM . . . . . . . . . . . . . . . . . . . . Plasma to 0.97 s John sees big moly injection (started by 0.9 s) H/D about 6% ---------------------------------------------------------------------------- 1000929009 irby PHYSICS_OPERATOR Sep 29 2000 11:23:37:296AM . . . . . . . . . . . . . . . . . . . . PCS Repeat Plasma to 0.95 s --- similar injection to last shot H/D from 5 to 7% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -13.3723 -23.7262 -96.3854 dIp/dt (kA/ms): -1.4010 -2.7954 -2.7976 -6.4854 pressure (mTorr): 0.0614 0.0628 0.0608 0.0562 Bz0 (mT): -3.3155 -0.7030 0.2372 20.6736 Br0 (mT): -0.6453 -1.1448 -0.9961 -2.8890 field, gas, current rise okay ---------------------------------------------------------------------------- 1000929010 irby PHYSICS_OPERATOR Sep 29 2000 11:49:11:170AM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma for 0.87 s, still have oscillation on j-port feedback ---------------------------------------------------------------------------- 1000929011 irby PHYSICS_OPERATOR Sep 29 2000 12:03:26:593PM . . . . . . . . . . . . . . . . . . . . PCS repeat --- RF guys change the phase before shot IGT at 1.8e-6 Torr Plasma to rampdown Injection from j-port, but lower power let us get through it Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4242 -13.3723 -28.9146 -111.9503 dIp/dt (kA/ms): -1.5282 -2.9236 -3.4334 -7.2484 pressure (mTorr): 0.0594 0.0608 0.0608 0.0555 Bz0 (mT): -3.1133 -0.4629 0.6759 20.8120 Br0 (mT): -1.0789 -1.2171 -1.4125 -3.3568 Startup okay ---------------------------------------------------------------------------- 1000929012 irby PHYSICS_OPERATOR Sep 29 2000 12:24:26:810PM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma to 1.05 s Oscillation cured on j-port, about 850 kW from 3+4 Startup looks okay ---------------------------------------------------------------------------- 1000929013 irby PHYSICS_OPERATOR Sep 29 2000 12:47:02:826PM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma to rampdown --- 2 h-mode periods 1st h-mode from j-port ---- phase is now [0, pi, 0, pi] ---------------------------------------------------------------------------- 1000929014 irby PHYSICS_OPERATOR Sep 29 2000 1:04:18:983PM . . . . . . . . . . . . . . . . . . . . Loaded seg 3 of 1000913016 into seg 3 for upper null diverted plasma --- needed for RF to make clear measurement of j-port efficiency Got upper null Plasma into rampdown Small outer gap Stored energy and Te going up with j-port power!! Startup okay --- no changes to make except removing TF backporch ---------------------------------------------------------------------------- 1000929015 irby PHYSICS_OPERATOR Sep 29 2000 3:23:24:296PM . . . . . . . . . . . . . . . . . . . . TF backporch removed Crowbars on TF, OH2U, OH2L, EF1 Ground fault on OH2L OH2L still high resistance to ground --- will do 1 kV high pot Hi pot to ground looks good ---- no current measureable Inspection of bus finds nothing No fault from I2t Checked bus instrumentation rack for signs of arcs --- nothing found ---------------------------------------------------------------------------- 1000929016 irby PHYSICS_OPERATOR Sep 29 2000 3:28:52:606PM . . . . . . . . . . . . . . . . . . . . OH test Looks great ---- will do TF test next ---------------------------------------------------------------------------- 1000929017 irby PHYSICS_OPERATOR Sep 29 2000 3:49:08:233PM . . . . . . . . . . . . . . . . . . . . TF test at 50 kA Looks great ---------------------------------------------------------------------------- 1000929018 irby PHYSICS_OPERATOR Sep 29 2000 3:58:34:436PM . . . . . . . . . . . . . . . . . . . . Plasma attempt Plasma to rampdown --- beautiful heating from j-port ---------------------------------------------------------------------------- 1000929019 irby PHYSICS_OPERATOR Sep 29 2000 4:21:15:606PM . . . . . . . . . . . . . . . . . . . . Moved back to seg 2 to give John lower diverted plasma --- time for h-modes Added 2 ms to prefill puff ---- pressure a little low last shot Plasma to 0.84 s, but injection started 0.75 or so, lost j4 Got higher pressure Fast current rise, but hesitation at 50 ms Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -10.8009 -23.7717 -122.3497 dIp/dt (kA/ms): -0.8913 -2.4184 -3.6866 -8.1408 pressure (mTorr): 0.0650 0.0650 0.0672 0.0608 Bz0 (mT): -3.2586 -0.5644 0.9588 20.1979 Br0 (mT): -0.9314 -1.5746 -1.8959 -4.0177 ---------------------------------------------------------------------------- 1000929020 irby PHYSICS_OPERATOR Sep 29 2000 4:56:59:936PM . . . . . . . . . . . . . . . . . . . . Reduced prefill by 1 ms (22 ms pulse width) Another ground fault --- same time as on shot 15 Stopping run to investigate

Session Leader Comments
Sep 29 2000 09:24:41:577AM	1000929001	Steve Wukitch	001 D: 0.5 MW from 1.1 - 1.45 sec E: 0.5 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec J-port phase [0,pi,0,pi] plasma D and E did not run because the sources were off J3: ran but poorly tuned J4: ran but poorly tuned nasty injection (moly) ugly sparc from J at ~0.92 sec phase was [0,pi/2,0,pi/2] next shot: power test
Sep 29 2000 09:32:24:327AM	1000929002	Steve Wukitch	002 scanner test
Sep 29 2000 09:35:12:217AM	1000929003	Steve Wukitch	003 50 kA TF test
Sep 29 2000 09:59:44:733AM	1000929004	Steve Wukitch	---------------------------------------------------------------------------- 004 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec J-port phase [0,pi,0,pi] plasma 1.5 MW total from D and E J3: ran to 0.5 MW J4: failed phase was [0,pi/2,0,pi/2] phase feedback does not appear to be working
Sep 29 2000 10:30:33:170AM	1000929005	Steve Wukitch	---------------------------------------------------------------------------- 005 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec plasma 1.5 MW total from D and E J3: ran to 0.5 MW J4: failed phase feedback is oscillating
Sep 29 2000 10:26:54:093AM	1000929006	Steve Wukitch	---------------------------------------------------------------------------- 006 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.5 MW from 0.6- 1.0 sec J4: 0.1-0.5 MW from 0.6- 1.0 sec plasma 1.5 MW total from D and E J3: ran to 0.5 MW J4: ran to 0.5 MW phase feedback is oscillating
Sep 29 2000 10:43:13:000AM	1000929007	Steve Wukitch	---------------------------------------------------------------------------- 007 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec Changed the phase feedback to narrowband from wideband plasma 1.5 MW total from D and E J3: failed J4: 0.02-0.75 MW from 0.5- 1.0 sec
Sep 29 2000 11:15:18:653AM	1000929008	Steve Wukitch	---------------------------------------------------------------------------- 008 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec plasma 1.5 MW total from D and E J3: .1-0.75 MW with max faults at the end of pulse J4: .1-0.75 MW with max faults
Sep 29 2000 03:45:01:467PM	1000929014	Steve Wukitch	---------------------------------------------------------------------------- 014 request D: 0.5-0.75 MW from 1.1 - 1.45 sec E: 0.5-0.75 MW from 1.1-1.45 sec J3: 0.1-0.75 MW from 0.6- 1.0 sec J4: 0.02-0.75 MW from 0.5- 1.0 sec upper x-point and 5.1 T plasma 1.5 MW total from D and E J3: .1-0.75 MW J4: .1-0.75 MW - early trip J-port heating was effective; made more neutrons and a hotter core than D-E

Physics Operator Comments
Sep 29 2000 08:12:34:467AM		Jim Irby	Did coldstart: rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 29-SEP-2000 07:32:36.19 Loaded seg 2 of 1000927012 into seg 2.
Sep 29 2000 09:18:29:903AM	1000929001	Jim Irby	Plasma into rampdown FMIT 3 and 4 on line ---- h-mode large injection during rf, probably from the top middle of the antenna H/D 3 to 5% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2154 -10.7554 -23.7262 -104.1679 dIp/dt (kA/ms): -1.0173 -2.4172 -3.6900 -5.9790 pressure (mTorr): 0.0628 0.0621 0.0614 0.0621 Bz0 (mT): -3.2788 -1.6726 0.5069 21.2920 Br0 (mT): -1.0343 -0.8859 -1.0391 -3.3553
Sep 29 2000 09:31:12:137AM	1000929002	Jim Irby	No Power test to check TF tap scanner Still have glitches on upper and inner taps
Sep 29 2000 09:43:59:420AM	1000929003	Jim Irby	50 kA TF test Glitch gone on scanner
Sep 29 2000 10:01:28:327AM	1000929004	Jim Irby	Try for plasma Plasma to rampdown D&E are running --- injection right before h-mode H/D up to 7% during rf
Sep 29 2000 10:12:13:077AM	1000929005	Jim Irby	PCS repeat Plasma to rampdown Nice EDA h-mode --- 75 kJ Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.3788 -10.7554 -23.7262 -91.1971 dIp/dt (kA/ms): -1.2739 -2.5433 -2.9248 -5.7224 pressure (mTorr): 0.0657 0.0672 0.0672 0.0672 Bz0 (mT): -2.9686 -0.8011 0.0264 19.6330 Br0 (mT): -0.9121 -1.2421 -0.9065 -3.1574 pressure has been going up Bz0 just took a jog up by .5 mT Current rise a little slower
Sep 29 2000 10:25:26:047AM	1000929006	Jim Irby	Reduced pre-puff from 23 to 21 ms Argon enabled for John Plasma to rampdown --- good h-mode, 75 kJ, 1.5 MW of RF from D&E Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2154 -13.3496 -26.3204 -104.1452 dIp/dt (kA/ms): -1.3988 -2.9259 -3.0519 -5.8507 pressure (mTorr): 0.0628 0.0614 0.0650 0.0628 Bz0 (mT): -3.3210 -0.6083 0.4054 20.7979 Br0 (mT): -0.9450 -1.2865 -1.0237 -3.4615 pressure down a little Bz0 continues to rise Current rise better
Sep 29 2000 10:44:05:717AM	1000929007	Jim Irby	No PCS changes Plasma to 1.17 s --- Looks like D or E did us in, not j Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2154 -13.3496 -26.3204 -96.3854 dIp/dt (kA/ms): -1.3999 -2.9248 -2.7988 -5.8485 pressure (mTorr): 0.0657 0.0628 0.0628 0.0636 Bz0 (mT): -3.3765 -1.3212 0.7427 21.2542 Br0 (mT): -1.1961 -1.2284 -0.9503 -2.9496 Bz0 back down Pressure up a little Current rise okay
Sep 29 2000 11:07:13:140AM	1000929008	Jim Irby	Plasma to 0.97 s John sees big moly injection (started by 0.9 s) H/D about 6%
Sep 29 2000 11:23:37:297AM	1000929009	Jim Irby	PCS Repeat Plasma to 0.95 s --- similar injection to last shot H/D from 5 to 7% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -13.3723 -23.7262 -96.3854 dIp/dt (kA/ms): -1.4010 -2.7954 -2.7976 -6.4854 pressure (mTorr): 0.0614 0.0628 0.0608 0.0562 Bz0 (mT): -3.3155 -0.7030 0.2372 20.6736 Br0 (mT): -0.6453 -1.1448 -0.9961 -2.8890 field, gas, current rise okay
Sep 29 2000 11:49:11:170AM	1000929010	Jim Irby	No PCS changes Plasma for 0.87 s, still have oscillation on j-port feedback
Sep 29 2000 12:03:26:593PM	1000929011	Jim Irby	PCS repeat --- RF guys change the phase before shot IGT at 1.8e-6 Torr Plasma to rampdown Injection from j-port, but lower power let us get through it Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4242 -13.3723 -28.9146 -111.9503 dIp/dt (kA/ms): -1.5282 -2.9236 -3.4334 -7.2484 pressure (mTorr): 0.0594 0.0608 0.0608 0.0555 Bz0 (mT): -3.1133 -0.4629 0.6759 20.8120 Br0 (mT): -1.0789 -1.2171 -1.4125 -3.3568 Startup okay
Sep 29 2000 12:24:26:810PM	1000929012	Jim Irby	No PCS changes Plasma to 1.05 s Oscillation cured on j-port, about 850 kW from 3+4 Startup looks okay
Sep 29 2000 12:47:02:827PM	1000929013	Jim Irby	No PCS changes Plasma to rampdown --- 2 h-mode periods 1st h-mode from j-port ---- phase is now [0, pi, 0, pi]
Sep 29 2000 01:04:18:983PM	1000929014	Jim Irby	Loaded seg 3 of 1000913016 into seg 3 for upper null diverted plasma --- needed for RF to make clear measurement of j-port efficiency Got upper null Plasma into rampdown Small outer gap Stored energy and Te going up with j-port power!! Startup okay --- no changes to make except removing TF backporch
Sep 29 2000 03:23:24:297PM	1000929015	Jim Irby	TF backporch removed Crowbars on TF, OH2U, OH2L, EF1 Ground fault on OH2L OH2L still high resistance to ground --- will do 1 kV high pot Hi pot to ground looks good ---- no current measureable Inspection of bus finds nothing No fault from I2t Checked bus instrumentation rack for signs of arcs --- nothing found
Sep 29 2000 03:28:52:607PM	1000929016	Jim Irby	OH test Looks great ---- will do TF test next
Sep 29 2000 03:49:08:233PM	1000929017	Jim Irby	TF test at 50 kA Looks great
Sep 29 2000 03:58:34:437PM	1000929018	Jim Irby	Plasma attempt Plasma to rampdown --- beautiful heating from j-port
Sep 29 2000 04:21:15:607PM	1000929019	Jim Irby	Moved back to seg 2 to give John lower diverted plasma --- time for h-modes Added 2 ms to prefill puff ---- pressure a little low last shot Plasma to 0.84 s, but injection started 0.75 or so, lost j4 Got higher pressure Fast current rise, but hesitation at 50 ms Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.1926 -10.8009 -23.7717 -122.3497 dIp/dt (kA/ms): -0.8913 -2.4184 -3.6866 -8.1408 pressure (mTorr): 0.0650 0.0650 0.0672 0.0608 Bz0 (mT): -3.2586 -0.5644 0.9588 20.1979 Br0 (mT): -0.9314 -1.5746 -1.8959 -4.0177
Sep 29 2000 04:56:59:937PM	1000929020	Jim Irby	Reduced prefill by 1 ms (22 ms pulse width) Another ground fault --- same time as on shot 15 Stopping run to investigate

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:54:57:403AM	Plasma	Ok
2	09:20:17:077AM	Test	Ok	Scanner Test Shot
3	09:33:17:297AM	Test	Ok
4	09:46:42:373AM	Plasma	Ok
5	10:02:50:903AM	Plasma	Ok
6	10:18:34:717AM	Plasma	Ok
7	10:34:40:263AM	Plasma	Ok
8	10:55:42:403AM	Plasma	Ok
9	11:14:41:187AM	Plasma	Ok
10	11:34:18:357AM	Plasma	Ok
11	11:55:26:123AM	Plasma	Ok
12	12:14:11:967PM	Plasma	Ok
13	12:35:21:373PM	Plasma	Ok
14	12:55:16:030PM	Plasma	Ok
15	01:16:18:530PM	Plasma	Bad	TF Crowbar
16	03:25:37:933PM	Test	Ok	OH 50 KA test
17	03:36:52:343PM	Test	Ok	TF 50 KA test
18	03:50:06:500PM	Plasma	Ok
19	04:10:18:497PM	Plasma	Ok
20	04:37:31:137PM	Plasma	Bad	ground fault OH2L as in shot 15