Miniproposals

Miniproposal: 306 Date Filed: 6/19/2002 Title: Density Limits, Transport and Turbulence First Author: Martin Greenwald Session Leader: Martin Greenwald (shots 1-26)

Miniproposal: 322 Date Filed: 8/29/2002 Title: MSE Calibration II First Author: Howard Yuh Session Leader: Steve Wukitch (shots 27-37)

Miniproposal: 326 Date Filed: 8/26/2002 Title: D, E, and J-port Antenna Evaluation and Comparison First Author: Steve Wukitch Session Leader: Steve Wukitch (shots 27-37)

Engineering Operator Run Comment

MP#306 Density Limits with piggybacking for MP#316 Active MHD Spectrosco

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:31:850PM

Author: To Be Determined

Run Plan for 1021107 mp 306 Density Limits Session Leader - Greenwald Phys Op - Wolfe ============================ Plan: Extend density limit studies using inboard puff and small SSep to reach the density limit without ramping down current. Probe deeply with the ASP - look for evolution of ne, Te, Vf and fluctuations as density is raised. ============================== Results: A good day, we gas puffed to almost 6e20 on many shots - reached (nominally) 1.2 x nG. (This may need tweaking since the minor radius might be varying in poloidal detachment and there may be more density in the divertor than usual.) Good profiles were obtained. Required adjusting the bias voltage since the floating potential and temperature were varying as the limit was approached. Fluctuations were enormous. While there is gradual cooling as the density is raised, some sort of bifurcation occurs between 0.5 and 0.75 x nG. There is a sharp drop in Te, a somewhat smaller drop in density and a sharp increase in Vf. This occurs at about the time that the MARFE, which had been sitting near the lower divertor, moves to the upper chamber. The "flows" from the inner puff as seen by the video camera, follow this movement (which takes place between video fields). We may not be seeing flow, but some sort of rearrangement of the power balance. The flux tube with the gas puff would be cold on both ends - with a MARFE at one end and the puff at the other. Things to look for in future runs: 1. use ECE at lower density/current (.4 MA?) to get internal evolution without hitting cutoff 2. fueling efficiency/rate vs SSep 3. n0 vs ne - compare inboard to normal gas puff 4. use gas puff technique to get very high density H-modes - study confinement properties, delta scaling ================================ Shots suitable for further analysis include: (Other good shots but without probe) shot probe depths (mm) n/ng 1021107004 -4, -4 .44, .66 1021107005 -4, -3, -3 .45, .65, .94 1021107008 -5, -5 .58, .95 1021107009 -7, -4 .97, 1.2 1021107010 -10, -6 .94, 1.2 1021107011 -14, -11 .93, 1.2 1021107012 -16 .91 1021107014 -22 1.02 1021107015 -23 1.07 1021107016 tbd 1.2 1021107018 -26 1.2 1021107019 tbd 1.2 1021107020 -28 1.2 1021107023 -32 1.15 1021107024 -13 .75 1021107026 -6, -9, -11 .5, .8, 1.1

Entered: Jul 7 2004 03:49:31:867PM

Author: To Be Determined

Run Plan and Engineering setup for Thurs. Nov 7, 2002 part B MP#326 RF Antenna evaluation (with piggybacking for MP#322 MSE Calibration - yuh,scott) SL: Wukitch PO: Snipes Engineering Setup: ------------------ Power Systems as on 1021002024 Overnight ECDC in D2 at 2e-4 torr, off by 6:00AM *** Run to begin at 8:00 AM *** Gas setup: B-Top 6 psi D2 Hybrid Enabled (PG4) B-side lower 1 psi Ar Hybrid Enabled (PG1) B-side upper 10 psi D2 Hybrid DISABLED (PG2, for ECDC) C-Side 30 psi D2 Hybrid Enabled (PG3) J-Bottom as is, Hybrid DISABLED Lower divertor capillary: 40 psi D2 Enable the following gate valves, assuming no vacuum problems: ECE,VUV,DNB RF Setup: #1,2,3 to computer mode by 7:00 am Run Plan: --------- Begin with vacuum conditioning without field (< 45 minutes) With constant field(~5.3T)and vacuum ramp RF power (3 shots likely). RF ramps about 250msec each, we can gas puff and turn on EF coils after 1sec; this could be useful to calibrate gas puff vs pressure for the next step. Note: close pump gate valves in pulse state. Fizzle detector on time moved to 1.7sec With constant field(~5.3T)and scan fill pressure (0.1,0.5,1 mtorr) (5-6 shots) Note - on 1021004 we used 330msec pg4 pulse to get to 0.9mTorr, so lacking any other information we might start with 35msec for the 0.1mTorr point, 170msec for the 0.5mTorr and 350 for 1mTorr. We want the pumpout gate valve closed for these, and the DNB should not be opening until after the RF pulses are over since they pump the torus back out while they're open. plasma shots - Power system setup as at start of run, gate valves stay open in pulse. With 3 separate RF pulses: inner wall limited discharge at 5.4 T, Ip=0.8 (3 shots) Can start from a recent equilibrium with more negative clearin. diverted discharge (1010703003) at 5.4 T, Ip=0.8 with power scan (1.0,1.4 MW) (2-3s Will need to either copy forms or recalculate predictors for this old shot. With RF "stacked", i.e. all at once, repeat to maximize RF power output, and hopefully beta. (time remaining) Vacuum conditioning: HV on 4 pm Set phase balance fault threshold of D and E to vacuum conditioning. Power (Vmax) Shot: D E J3 2237 80( ) 80( ) 150( ) 100 ms pulse, many faults on all. 2238: repeat Many fsults on D. 1 on E. Many on J3. same power level. 1 sec pulse. Raise J vol limit fault to 4430. 2239: 1 sec pulse. 80( )80( ) 140( ) Raise J vol limit fault to 4500. Still VOltage limit on J. 2240: Repeat. Clean E. D better. J better. 2241: 80(33 ) 85(34) 140(25 ), 2 faults each on D and E. Clean J. 2242: 85( ) 90( ) 150( ), 4 faults each on D, 1 on E. 2 on J. 2243: 90( ) 95( ) 160( ), E 1 fault. D and J several faults. 2244: 90(36) 95(37) 160(25 ), D 1 fault. E and J several faults. 2245: 90(36) 95(37) 160(25 ), J clean. 2247: 90(36) 95(37) 170( ), J clean. E clean. D 1 fault. J one fault 2249: 95(36.5) 100(37) 180(25 ), J clean. E many fault. D clean 2250: 100 100(37) 190( ), J many faults. E 1 fault. D many faults 2251: 100( ) 100(37) 190( ), J many faults. E 1 fault. D 2 faults 2252: 105(38) 105(38) 150( ) D and E clean. J better 2253: 110(39) 110(39) 150( ) D 2 faults and E 3 faults. J better 2254: 110(39 ) 110(39) 150( ) D 4 faults and E clean . J worse 2255: 110(39 ) 110(39) 120( ) D 4 faults and E clean. 2256: 110(39 ) 110(39) 120( ) D clean and E clean. J clean 2257: 110(39 ) 110(39) 190( ) D clean and E clean. 2258: repeat. D 1 fault and E clean, J many faults. 2259: J3 only. 160( ) clean 2260: J3 only. 180( ) many faults 2261: J3 only. 180( ) many faults 2262: J3 only. 170( ) many faults, better 2263: J3 only. 170( ) many faults 2264: J3 only. 160( ) clean 2265: J3 only. 170( ) better 2266: J3 only. 170(27 kV) clean 2267: J3 only. 180(27) clean 2268: J3 only. 190(28) 2 faults 2270: J3 only. 200(28.6) good. Move ST again. 2271: J3 only. 200(29) faults again. 2272: J3 only. 200(29) 2273: J3 only. 200(29) faults again. 2274: J3 only. 180(28) faults again. 2275: J3 only. 180(28) faults again. 2276: J3 only. 180(28) better 2277: J3 only. 190(29) clean. 2278: J3 only. 200(29.2 kV) faults again. ======================================== 2280: J3 only. 200(29.2 kV) faults. 2281: J3 only. 200(29.2 kV) faults. 2282: J3 only. 200(29.2 kV) faults., Not getting better, -------------------------------------------------- J-port is arcing, probably in the line, at ~30 kV ====================================================================== 027 vacuum shot, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.2 MW [0.5,0.7] sec result: D:clean 40 kV E:clean 40 kV J:faulted at 30 kV as it has in vacuum test shots 028 vacuum shot, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.25 MW [0.5,0.7] sec result: D:clean 40 kV E:clean 40 kV J:faulted at 30 kV as it has been in vacuum test shots 029 0.1 mtorr, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.25 MW [0.5,0.7] sec result: ~0.08 mtorr D:30 kV before sudden transition E:clean 30 kV J:faulted 16 kV 030 0.5 mtorr, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.25 MW [0.5,0.7] sec result: 0.5->0.1 mtorr D:clean but discharge present E:clean but discharge present J:faulted 16-30 kV 031 BT~5.4 T,Ip=0.8 MA,0.7 D:1.0 MW [0.6,.9] sec E:1.0 MW [0.92,1.22] sec J:1.0 MW [1.25,1.55] sec result: H-modes D:1.0 MW clean E:1.0 MW failed bad tune J:1.0 MW clean 032 BT~5.4 T,Ip=0.8 MA D:1.0 MW [0.6,.9] sec E:1.0 MW [0.9,1.2] sec J:1.0 MW [1.2,1.5] sec result: H-modes - need more separation D:1.0 MW clean E:1.0 MW clean J:1.0 MW clean 033 BT~5.4 T,Ip=0.8 MA D:1.0 MW [0.9,1.15] sec E:1.0 MW [1.2,1.5] sec J:1.0 MW [0.6,0.85] sec result: H-modes - not too bad of a comparison D:0.9 MW E:1.25 MW J:1.25 MW 034 BT~5.4 T,Ip=0.8 MA D:1.25 MW [0.9,1.15] sec E:1.25 MW [1.2,1.5] sec J:1.25 MW [0.6,0.85] sec result: H-modes - not a good comparison D:1.25 MW 2 faults E:1.25 MW 1 fault J:1.25 MW 2 faults 036 BT~5.4 T,Ip=0.8 MA D:1.25 MW [1.2,1.5] sec E:1.25 MW [0.9,1.15] sec J:1.25 MW [0.6,0.85] sec result: H-modes - good comparison D:1.25 MW E:1.25 MW J:1.25 MW 037 BT~5.4 T,Ip=0.8 MA D:1.1 MW [0.6,1.5] sec E:1.1 MW [0.6,1.5] sec J:1.1 MW [0.6,1.5] sec result: H-modes D:1.25 MW 4 faults E:1.25 MW J:1.25 MW faults Run Summary D and E-port antennas conditioned to 40 kV quickly in vacuum. The addition of a magnetic field in vacuum did not degrade the voltage handling. With B-field and gas pressures up to 1 mtorr, the antennas appeared to ionize some of the gas but did not appear to breakdown. J-port struggled to reach 30 kV and we need to find the breakdown location which is probably in the lines somewhere before disassembly. The presence of neutral pressure severly limited the maximum voltage on J-port. In plasmas, the comparison indicates the antennas have nearly identical heating efficiency (see 036).

Physics Operator Summaries

Entered: Jul 7 2004 04:37:16:957PM

Author: To Be Determined

Physics Operator Summary for Thursday, Nov 7, 2002 This is to be a twelve hour run, from 8:00AM to 8:00PM, covering two experiments and two principal piggyback experiments MP#306 Density Limits (with piggybacking for MP#316 Active MHD Spectroscopy - snipes) SL: Greenwald PO: Wolfe EO: Fitzgerald,Byford to be followed by MP#326 RF Antenna evaluation (with piggybacking for MP#322 MSE Calibration - yuh,scott) SL: Wukitch PO: Snipes EO: Engineering Setup: ------------------ Power Systems as on 1021002024 Overnight ECDC in D2 at 2e-4 torr, off by 6:00AM *** Run to begin at 8:00 AM *** Gas setup: B-Top 6 psi D2 Hybrid Enabled (PG4) B-side lower 1 psi Ar Hybrid Enabled (PG1) B-side upper 10 psi D2 Hybrid DISABLED (PG2, for ECDC) C-Side 30 psi D2 Hybrid Enabled (PG3) J-Bottom as is, Hybrid DISABLED Lower divertor capillary: 40 psi D2 Enable the following gate valves, assuming no vacuum problems: ECE,VUV,DNB RF Setup: #1,2,3 in Run On by 7:00AM Run Plan: --------- For part A (MP#306 Density Limits) ---------------------------------- Start from 1021002024, with current reduced to 800kA; this shot uses SSEP control, may need to change the offset from -3000 to -2500. Puff from NINJA inner wall capillary to increase density to n_greenwald. Poke probes and such. Vary ssep to assess inner wall fueling efficiency. For part B (MP#326 - RF Evaluation) ------------------------------------ Begin with vacuum conditioning without field (< 45 minutes) With constant field(~5.3T)and vacuum ramp RF power (3 shots likely). RF ramps about 250msec each, we can gas puff and turn on EF coils after 1sec; this could be useful to calibrate gas puff vs pressure for the next step. Note: close pump gate valves in pulse state. Fizzle detector on time moved to 1.7sec With constant field(~5.3T)and scan fill pressure (0.1,0.5,1 mtorr) (5-6 shots) Note - on 1021004 we used 330msec pg4 pulse to get to 0.9mTorr, so lacking any other information we might start with 35msec for the 0.1mTorr point, 170msec for the 0.5mTorr and 350 for 1mTorr. We want the pumpout gate valve closed for these, and the DNB should not be opening until after the RF pulses are over since they pump the torus back out while they're open. plasma shots - Power system setup as at start of run, gate valves stay open in pulse. With 3 separate RF pulses: inner wall limited discharge at 5.4 T, Ip=0.8 (3 shots) Can start from a recent equilibrium with more negative clearin. diverted discharge (1010703003) at 5.4 T, Ip=0.8 with power scan (1.0,1.4 MW) (2-3shots) Will need to either copy waveforms or recalculate predictors for this old shot. With RF "stacked", i.e. all at once, repeat to maximize RF power output, and hopefully beta. (time remaining) ------------------- Results: There was a power glitch at 6:30AM that delayed the cooling somewhat. There were also dislocations in camac highways; apparently one of the power strips in the magnetics rack had tripped. The first shot had screwy demands from the hybrid, apparently related to saturated magnetics signals. A hybrid test shot was ok, and shot 2 ran as programmed. However, we had a similar event on shot#6, with large offsets on the BP coils in the hybrid. We concluded that the first 80 integrators were somehow being gated on (i.e. not in reset) at some time prior to the shot, probably about a minute before. Nobody can figure out how this could happen. Bob examined the wiring, checked the voltage levels, and power cycled the integrators, and the problem did not recur. The shots in the density limit run ran pretty much as expected. The NINJA puff easily brought us up to n_G at 800kA, although there wasn't very fine control on the rise rate; basically they used the plenum pressure to try to adjust this, without great success. With the exception of shots #1 and 6, which had the saturated magnetics problem, there was only one fizzle. I varied pulse gas 4 between 15 msec and 23msec to try to keep the startup from bouncing and reduce the runaways. Shot #7 was a no power test to confirm that the integrator was resetting after the bad shot 6, and shot #25 was a no power cycle due to the PF breaker pulling. It also pulled after shot 26; the problem was apparently a spurious indication "scr not conducting" in EF1 supply, at a time when the supply was not on. Scorecard (Part A): ------------------- Tests/nopower 2 Duds 1 Fizzles 2 Plasmas 21 (All disruptions, as desired) ========== == Shots 26

Entered: Jul 7 2004 04:37:16:973PM

Author: To Be Determined

Starting MP326 RF Evaluation (with piggybacking for MP#322 MSE Calibration - yuh,scott) Session Leader: S. J. Wukitch Physics Operator: J. A. Snipes For part B (MP#326 - RF Evaluation) ------------------------------------ Begin with vacuum conditioning without field (< 45 minutes) With constant field(~5.3T)and vacuum ramp RF power (3 shots likely). RF ramps about 250msec each, we can gas puff and turn on EF coils after 1sec; this could be useful to calibrate gas puff vs pressure for the next step. Note: close pump gate valves in pulse state. Fizzle detector on time moved to 1.7sec With constant field(~5.3T)and scan fill pressure (0.1,0.5,1 mtorr) (5-6 shots) Note - on 1021004 we used 330msec pg4 pulse to get to 0.9mTorr, so lacking any other information we might start with 35msec for the 0.1mTorr point, 170msec for the 0.5mTorr and 350 for 1mTorr. We want the pumpout gate valve closed for these, and the DNB should not be opening until after the RF pulses are over since they pump the torus back out while they're open. plasma shots - Power system setup as at start of run, gate valves stay open in pulse. With 3 separate RF pulses: inner wall limited discharge at 5.4 T, Ip=0.8 (3 shots) Can start from a recent equilibrium with more negative clearin. diverted discharge (1010703003) at 5.4 T, Ip=0.8 with power scan (1.0,1.4 MW) (2-3shots) Will need to either copy waveforms or recalculate predictors for this old shot. With RF "stacked", i.e. all at once, repeat to maximize RF power output, and hopefully beta. (time remaining) Summary: RF did O.K. and got up to 3 MW on shot 1021107037. The Active MHD antennas worked well even with RF. Scorecard: 11 shots, 6 plasmas, 4 tests, and 1 OH1 fault. Shot 27: Loaded shot 1021004010 into segment 1, 1010703003 into segment 2, and 1021030027 into segment 3. Turned off segments 2 and 3. Put in a 10 kA EF3 pulse from 0.8 to 1.4 s in segment 1. Set TF current to 150 kA extended out to 1.4 s. Got 6 kA on EF3, because I forgot to extend the proportional gain on the EF3 controller out to 1.7 s. Shot 28: Extended the proportional gain on EF3 out to 1.7 s. Shot 29: Repeat. Shot 30: Increased early prefill to 175 ms duration from -0.5 s. Reduced EF3 current to 6 kA. Shot 31: Reloaded segment 1 from shot 1021107026 to go to plasma shots again. Turned on segment 2, which is a copy of 1010703003 with recalculated predictors. Good shot. Short H-mode. Shot 32: Repeat. Good shot. A few H-modes. Shot 33: Increased prepuff by 4 ms to 25 ms duration. Good shot. Shot 34: Repeat. Good shot. Shot 35: OH1 did not commutate for some reason resulting in a dud. Shot 36: Good shot with several H-modes. Shot 37: Good shot with several H-modes out to 1.5 s.

Session Leader Comments
Nov 7 2002 08:01:33:553AM		Martin Greenwald	Run Plan for 1021107 mp 306 Density Limits Session Leader - Greenwald Phys Op - Wolfe ============================ Background: Changes in edge turbulent transport are correlated with n/ng. The goal is to understand the evolution of profiles and fluctuations as the limit is approached. Plan: We'll start out testing the ability to fuel to high densities using inboard gas puffing - as in 1021030021 SSep will be varied (starting close to double null). Once good conditions are established, we'll continue with the deep probe measurements at high densities.
Nov 7 2002 08:41:23:147AM	1021107002	Martin Greenwald	Good shot near-double null puff brought us to 3.8e20 density increase stopped when puff ends reaches about 90% of ng density limit disruption on rampdown
Nov 7 2002 08:56:57:450AM	1021107003	Martin Greenwald	Disrupts during rampdown still not quite enough gas puff actually reaches about n/ng 1.08 at Ip rampdown roughly double null topology
Nov 7 2002 10:07:50:263AM	1021107004	Martin Greenwald	Shape changed - SSep to -2 mm (gets near -1 at 1 second) Disrupted early ~ 1 second density only reached 4e20 ~ 0.8 ng Prad still not too bad - only about 65% at disruption probes at 0.6 0.9
Nov 7 2002 10:03:02:507AM	1021107005	Martin Greenwald	Disrupts at 1.45 second Density to 5.2e20, n/ng ~ 1.08 probes at .6 .9 1.2 seconds
Nov 7 2002 10:03:14:867AM	1021107006	Martin Greenwald	fizzle
Nov 7 2002 10:50:10:703AM	1021107007	Martin Greenwald	test
Nov 7 2002 11:05:03:760AM	1021107008	Martin Greenwald	Similar to last shot density gets a bit higher to 6e20 probes at 0.75 1.05 1.35
Nov 7 2002 11:14:55:710AM	1021107009	Martin Greenwald	Similar shot density almost to 6 n/ng to 1.18 first plunge removed others at 1.05 1.35 others put in deeper nominally reaches 4 mm inside for last scan
Nov 7 2002 11:28:48:950AM	1021107010	Martin Greenwald	similar again n/ng ~ 1.2 probes at 1.05 and 1.35 rho = -10 and -6
Nov 7 2002 11:45:54:350AM	1021107011	Martin Greenwald	Similar again disrupted at 1.36 probe in deeper + equilibrium moved t = 1.05 and 1.35 sec rho = -13 -11 mm
Nov 7 2002 12:10:01:327PM	1021107012	Martin Greenwald	disrupts a bit early, miss the second probe plunge first plunge at 1.05 to -15 mm
Nov 7 2002 12:39:55:810PM	1021107013	Martin Greenwald	similar to last shot one plunge only - occurs after disruption
Nov 7 2002 12:39:41:170PM	1021107014	Martin Greenwald	plenum pressure reduced a bit discharge made it all the way to Ip rampdown before disrupting n/ng ~ 1.15 probe at 1.35, rho = -23
Nov 7 2002 12:56:10:210PM	1021107015	Martin Greenwald	Similar to previous shot improvement in probe bias rho to -23 mm probe measures 2e20 and 40 eV
Nov 7 2002 01:14:29:783PM	1021107016	Martin Greenwald	slightly more pressure in plenum disrupts during flattop again only caught a piece of the probe plunge a bit more bias on the probes too
Nov 7 2002 01:22:49:657PM	1021107017	Martin Greenwald	disrupted before probe plunge
Nov 7 2002 01:54:17:737PM	1021107018	Martin Greenwald	delay puff by another 20 msec disrupts right after probe plunge rho = -26 mm
Nov 7 2002 02:14:31:970PM	1021107019	Martin Greenwald	Looks like a good shot disrupted right after probe plunge - need to do additional efit East ne went to 3e20
Nov 7 2002 02:19:02:650PM	1021107020	Martin Greenwald	Moved probe to 1.3 seconds disrupted at 1.35 about 1.2 ng rho = -29 mm ne = 2.5 - 3e 20 Te = 25 - 30 eV
Nov 7 2002 02:49:13:307PM	1021107021	Martin Greenwald	disrupted before probe insertion
Nov 7 2002 03:01:51:277PM	1021107022	Martin Greenwald	fizzle
Nov 7 2002 03:28:17:367PM	1021107024	Martin Greenwald	Got half a scan to rho = -32 ne ~ 3e20 Te ~ 20 eV
Nov 7 2002 03:40:25:167PM	1021107024	Martin Greenwald	shallower probe insertion moved back to 0.9 where n/ng ~ .75 rho ~ -13 ne ~ 1.5e20 Te ~ 25
Nov 7 2002 04:36:35:410PM	1021107026	Martin Greenwald	probe in at 0.7 sec n/ng ~ 0.5 rho ~ -6 ne ~ 1.5e20 Te ~ 60 eV (need to compare with even lower density where Te ~ 60 eV at separatrix)
Nov 7 2002 07:42:33:117PM	1021107027	Steve Wukitch	027 vacuum shot, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.25 MW [0.5,0.7] sec result: D:clean 40 kV E:clean 40 kV J:faulted at 30 kV as it has been in vacuum test shots
Nov 7 2002 05:55:24:340PM	1021107028	Steve Wukitch	028 vacuum shot, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.25 MW [0.5,0.7] sec result: D:clean 40 kV E:clean 40 kV J:faulted at 30 kV as it has been in vacuum test shots
Nov 7 2002 06:21:30:943PM	1021107029	Steve Wukitch	029 0.1 mtorr, BT~5.4 T D:0.08-0.11 MW [0,.2] sec E:0.08-0.11 MW [0.25,0.45] sec J:0.14-0.25 MW [0.5,0.7] sec result: ~0.08 mtorr D:30 kV before sudden transition E:clean 30 kV J:faulted 16 kV
Nov 7 2002 07:43:07:727PM	1021107031	Steve Wukitch	031 BT~5.4 T,Ip=0.8 MA,0.7 D:1.0 MW [0.6,.9] sec E:1.0 MW [0.92,1.22] sec J:1.0 MW [1.25,1.55] sec result: H-modes D:1.0 MW clean E:1.0 MW failed bad tune J:1.0 MW clean
Nov 7 2002 07:43:19:100PM	1021107032	Steve Wukitch	032 BT~5.4 T,Ip=0.8 MA D:1.0 MW [0.6,.9] sec E:1.0 MW [0.9,1.2] sec J:1.0 MW [1.2,1.5] sec result: H-modes - need more separation D:1.0 MW clean E:1.0 MW clean J:1.0 MW clean
Nov 7 2002 07:43:40:650PM	1021107033	Steve Wukitch	033 BT~5.4 T,Ip=0.8 MA D:1.0 MW [0.9,1.15] sec E:1.0 MW [1.2,1.5] sec J:1.0 MW [0.6,0.85] sec result: H-modes - not too bad of a comparison D:0.9 MW E:1.25 MW J:1.25 MW
Nov 7 2002 07:43:52:680PM	1021107034	Steve Wukitch	034 BT~5.4 T,Ip=0.8 MA,0.7 D:1.25 MW [0.9,1.15] sec E:1.25 MW [1.2,1.5] sec J:1.25 MW [0.6,0.85] sec result: H-modes - not a good comparison D:1.25 MW 2 faults E:1.25 MW 1 fault J:1.25 MW 2 faults

Physics Operator Comments
Nov 7 2002 06:45:18:860AM		Steve Wolfe	Setting up shot for density limit run. Import seg2 from 1021002024 and reduce Ip from -1.0 -> -0.8e6, extend through 1.5sec Leave seg1 alone for now, although I'll probably want to raise pg4 a bit from 15msec Load/clean, ready for tomorrow.
Nov 7 2002 06:47:23:110AM		Steve Wolfe	There was apparently a power glitch around 6:30AM, which shut down several PLC's. Back on now, cooling proeceeding but may not be quite ready at 8:00AM
Nov 7 2002 08:11:42:070AM	1021107001	Steve Wolfe	shot #1: Do another load/clean for luck, no changes from previous setup (1021002024 @800kA) No NINJA puff on this one. dud. No ef3. Magnetics data looks like all zeros. Hybrid inputs #30-45 are saturated. also 49-51, 53-55. Looks like the hybrid put out some strange demands.
Nov 7 2002 08:34:12:887AM	1021107002	Steve Wolfe	shot #2: Test shot on hybrid looks ok. Magnetics data looks like it went at the wrong time on shot#1. Raise pre-puff from 15msec to 18msec and go again. plasma until brian killed it at 1.7sec. next shot: Brian will try harder. I'll drop the pre-puff.
Nov 7 2002 08:49:15:673AM	1021107003	Steve Wolfe	shot #3: pg4 from 18msec to 15msec plasma to 1.62sec - Brian is wimping out on us!
Nov 7 2002 08:53:29:960AM	1021107003	Steve Wolfe	shot #3: pg4 from 18msec to 15msec plasma to 1.62sec - Brian is wimping out on us! next shot: tune ssep - offset to -2500, ssep from -.002 to -.003
Nov 7 2002 09:23:50:947AM	1021107004	Steve Wolfe	shot #4: tune ssep - offset to -2500, ssep from -.002 to -.003 (previous shot was ssep=0) increase argon to 30msec plasma to 1.04sec. ssep didn't change much, got around -2.5 but went to -1mm at 1sec
Nov 7 2002 09:47:37:967AM	1021107005	Steve Wolfe	shot #5: change ssep from -.003 to -.005 plasma to 1.45sec ssep=-3mm to -5mm next shot: repeat, start scanning probes and things.
Nov 7 2002 10:22:20:363AM	1021107006	Steve Wolfe	shot #6: reduce clearin by 2mm,rcur by 1mm fizzle- power supplies look funny. granetz says there is a cpci error. It looks like there are large offsets on several of the bp_bc inputs to the hybrid. This causes the hybrid to put out funny demands. Could be the integrator gate is staying on, allowing the integrators to drift up during, say, init, rather than being in reset until the gate time. Bob is checking in the cell.
Nov 7 2002 10:48:48:450AM	1021107007	Steve Wolfe	shot #7: test shot to see if the integrators are in fact reset now. A hybrid test shot was ok. looks ok. try it again.
Nov 7 2002 10:51:59:910AM	1021107008	Steve Wolfe	shot #8: plasma disrupts at 1.45sec, on cue. next shot: no changes
Nov 7 2002 11:08:37:077AM	1021107009	Steve Wolfe	shot #9: plasma disrupts at 1.39sec, on cue. next shot: no changes
Nov 7 2002 11:35:57:447AM	1021107010	Steve Wolfe	shot #10: plasma disrupts at 1.42sec next shot: decrease outer gap late
Nov 7 2002 11:46:37:493AM	1021107011	Steve Wolfe	shot #11: pg4 from 15->17msec, rcur at 1.5sec from .657 to .660, leave at .657 at 1.0 plasma to 1.37sec. next shot: no changes
Nov 7 2002 12:00:04:937PM	1021107012	Steve Wolfe	shot #12:no changes plasma to 1.28sec, didn't get to last probe time. next shot: no changes
Nov 7 2002 12:10:03:700PM	1021107013	Steve Wolfe	shot #13:no changes plasma to 1.25 sec again. next shot: reduce NINJA plenum pressure
Nov 7 2002 12:27:46:010PM	1021107014	Steve Wolfe	shot #14: reduce NINJA plenum pressure; pg4 to 19msec plasma to 1.65sec (into rampdown); only got to 3.0e20 nl4 by 1.5sec next shot: increase NINJA plenum pressure
Nov 7 2002 12:46:37:650PM	1021107015	Steve Wolfe	shot #15: increase NINJA plenum pressure plasma to 1.63sec again. next shot: back to 40psi on NINJA
Nov 7 2002 01:14:17:033PM	1021107016	Steve Wolfe	shot #16: back to 40psi on NINJA plasma to 1.36sec nearly lost it in startup, lots of runaways. next shot: pg4 to 21msec
Nov 7 2002 01:28:46:370PM	1021107017	Steve Wolfe	shot #17: pg4 to 21msec plasma to 1.30sec. next shot: delay the NINJA by 20msec Snipes et al. going to low frequency.
Nov 7 2002 01:40:39:793PM	1021107018	Steve Wolfe	shot #18: delay the NINJA by 20msec Snipes et al. going to low frequency on the active MHD plasma to 1.38sec next shot: decrease outer gap by 5mm (Brian says to do it!)
Nov 7 2002 01:54:23:970PM	1021107019	Steve Wolfe	shot #19: rcur at 1sec from .657 to .6595, 1.5 from .66 to .6625 plasma to 1.34sec; Brian liked the gap, I'm not sure his probe did. next shot: He's going to move the stop so the probe can go further in.
Nov 7 2002 02:11:13:467PM	1021107020	Steve Wolfe	shot #20: Brian didn't move the stop so the probe can go further in. changed probe timing disrupted at 1.35sec next shot: move plasma out again.
Nov 7 2002 02:50:50:823PM	1021107021	Steve Wolfe	shot #21: move plasma out again. rcur at [1.0,1.5] from [.6595,.6625] to [.6625,.6655]; pg4 from 22 to 24msec delay for camac - probe crate power supply needed cycling plasma to 1.24sec; too early. outer gap gets to ~1mm. next shot: probe earlier
Nov 7 2002 03:03:23:873PM	1021107022	Steve Wolfe	shot #22:probe earlier; pg4 from 24 to 23msec fizzle. looks like it went in, didn't drop the gas enough. next shot: pg4 to 20msec
Nov 7 2002 03:21:43:213PM	1021107023	Steve Wolfe	shot #23:probe earlier; pg4 from 23to 20msec plasma to 1.20 sec. Gets a half scan, I think the probe does it in. two bounces in startup, but it makes it. next shot: probe earlier, not as deep
Nov 7 2002 03:34:26:063PM	1021107024	Steve Wolfe	shot #24:probe earlier, not as deep plasma to 1.20 injection at .76sec seen on the density. startup still bouncing, with runaways. next shot: probe at 0.7sec; pg4 to 21msec
Nov 7 2002 03:47:58:710PM	1021107025	Steve Wolfe	shot #25: probe at 0.7sec; pg4 to 21msec no power shot, breaker pulled.
Nov 7 2002 04:01:13:540PM	1021107026	Steve Wolfe	shot #26: probe at 0.7sec; pg4 to 21msec plasma to 1.25sec End of Part A of today's run.
Nov 7 2002 04:39:33:693PM	1021107026	Joseph Snipes	Starting MP326 RF Evaluation (with piggybacking for MP#322 MSE Calibration - yuh,scott) Session Leader: S. J. Wukitch Physics Operator: J. A. Snipes For part B (MP#326 - RF Evaluation) ------------------------------------ Begin with vacuum conditioning without field (< 45 minutes) With constant field(~5.3T)and vacuum ramp RF power (3 shots likely). RF ramps about 250msec each, we can gas puff and turn on EF coils after 1sec; this could be useful to calibrate gas puff vs pressure for the next step. Note: close pump gate valves in pulse state. Fizzle detector on time moved to 1.7sec With constant field(~5.3T)and scan fill pressure (0.1,0.5,1 mtorr) (5-6 shots) Note - on 1021004 we used 330msec pg4 pulse to get to 0.9mTorr, so lacking any other information we might start with 35msec for the 0.1mTorr point, 170msec for the 0.5mTorr and 350 for 1mTorr. We want the pumpout gate valve closed for these, and the DNB should not be opening until after the RF pulses are over since they pump the torus back out while they're open. plasma shots - Power system setup as at start of run, gate valves stay open in pulse. With 3 separate RF pulses: inner wall limited discharge at 5.4 T, Ip=0.8 (3 shots) Can start from a recent equilibrium with more negative clearin. diverted discharge (1010703003) at 5.4 T, Ip=0.8 with power scan (1.0,1.4 MW) (2-3shots) Will need to either copy waveforms or recalculate predictors for this old shot. With RF "stacked", i.e. all at once, repeat to maximize RF power output, and hopefully beta. (time remaining)
Nov 7 2002 05:39:58:147PM	1021107027	Joseph Snipes	Shot 27: Loaded shot 1021004010 into segment 1, 1010703003 into segment 2, and 1021030027 into segment 3. Turned off segments 2 and 3. Put in a 10 kA EF3 pulse from 0.8 to 1.4 s in segment 1. Set TF current to 150 kA extended out to 1.4 s. Got 6 kA on EF3, because I forgot to extend the proportional gain on the EF3 controller out to 1.7 s.
Nov 7 2002 05:50:40:477PM	1021107028	Joseph Snipes	Shot 28: Extended the proportional gain on EF3 out to 1.7 s.
Nov 7 2002 05:51:53:697PM	1021107028	Joseph Snipes	Shot 29: Added 35 ms from -0.5 s to prefill to hopefully obtain 0.1 mTorr pressure.
Nov 7 2002 06:07:14:063PM	1021107029	Joseph Snipes	Shot 29: Repeat.
Nov 7 2002 06:12:13:273PM	1021107030	Joseph Snipes	Shot 30: Increased early prefill to 175 ms duration from -0.5 s. Reduced EF3 current to 6 kA.
Nov 7 2002 06:39:17:440PM	1021107031	Joseph Snipes	Shot 31: Reloaded segment 1 from shot 1021107026 to go to plasma shots again. Turned on segment 2, which is a copy of 1010703003 with recalculated predictors. Good shot. Short H-mode.
Nov 7 2002 06:50:06:037PM	1021107032	Joseph Snipes	Shot 32: Repeat. Good shot. A few H-modes.
Nov 7 2002 07:36:03:213PM	1021107033	Joseph Snipes	Shot 33: Increased prepuff by 4 ms to 25 ms duration. Good shot.
Nov 7 2002 07:36:11:560PM	1021107034	Joseph Snipes	Shot 34: Repeat. Good shot.
Nov 7 2002 07:39:00:423PM	1021107035	Joseph Snipes	Shot 35: OH1 did not commutate for some reason resulting in a dud.
Nov 7 2002 07:51:23:753PM	1021107036	Joseph Snipes	Shot 36: Good shot with several H-modes.
Nov 7 2002 08:03:52:773PM	1021107037	Joseph Snipes	Shot 37: Good shot with several H-modes out to 1.5 s.
Nov 7 2002 08:25:16:213PM	1021107037	Joseph Snipes	Summary: RF did O.K. and got up to 3 MW on shot 1021107037. The Active MHD antennas worked well even with RF. Scorecard: 11 shots, 6 plasmas, 4 tests, and 1 OH1 fault.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:03:57:620AM	Plasma	Bad	ef3 did not fire
2	08:30:31:473AM	Plasma	Ok
3	08:47:03:390AM	Plasma	Ok
4	09:06:17:840AM	Plasma	Ok
5	09:42:32:007AM	Plasma	Ok
6	10:01:37:940AM	Plasma	Bad	Power Supply Hybrid command problem?
7	10:36:38:790AM	Test	Ok
8	10:47:47:043AM	Plasma	Ok
9	11:06:39:730AM	Plasma	Ok
10	11:20:56:923AM	Plasma	Ok
11	11:37:18:450AM	Plasma	Ok
12	11:51:25:173AM	Plasma	Ok
13	12:05:43:850PM	Plasma	Ok
14	12:24:15:427PM	Plasma	Ok
15	12:43:43:223PM	Plasma	Ok
16	01:04:02:970PM	Plasma	Ok
17	01:18:56:747PM	Plasma	Ok
18	01:34:22:533PM	Plasma	Ok
19	01:48:58:180PM	Plasma	Ok
20	02:08:50:760PM	Plasma	Ok
21	02:43:53:140PM	Plasma	Ok
22	02:58:42:600PM	Plasma	Ok
23	03:11:59:747PM	Plasma	Ok
24	03:28:10:663PM	Plasma	Ok
25	03:44:42:080PM	Plasma	Ok
26	03:58:55:350PM	Plasma	Ok
27	05:28:54:537PM	Test	Ok
28	05:42:11:070PM	Test	Ok
29	05:55:57:513PM	Test	Ok
30	06:10:19:130PM	Test	Ok
31	06:32:04:260PM	Plasma	Ok
32	06:46:19:653PM	Plasma	Ok
33	06:59:53:283PM	Plasma	Ok
34	07:14:28:947PM	Plasma	Ok
35	07:28:54:687PM	Plasma	Bad	Hybrid problems ???
36	07:47:29:467PM	Plasma	Ok
37	08:01:07:723PM	Plasma	Ok