Miniproposals

Miniproposal: 073a Date Filed: 1/20/1995 Title: Effect of RF heating on divertor detachment characteristics First Author: Bruce Lipschultz Session Leader: Bruce Lipschultz (shots 1-35)

Engineering Operator Run Comment

Goetz/Blip

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:13:617PM

Author: To Be Determined

run 950502: engineering operator: V. Bertolino Physics operator: J. Goetz Session leader BLip Mini proposal #73: Effect of RF on Detachment The primary purpose of this run is to control the power flowing into the SOL (using RF) independent of the plasma current. Using this control we searched for the detachment threshold and characteristics as a function of SOL power. Radiated power in the divertor and the source rates for different impurities at the first-wall surfaces (CHromex spectrograph) were monitored. The McPherson spectrograph was utilized to to monitor the UV emission from the x-point region. The run was delayed because of a set of problems. The primary one was that there was a momentary 'glitch' in the power to the building which caused the pumps to turn off and the machine to be vented up to 30 mTorr. We finally got going with a dirty plasma around shot 10 late mornning. In summary there are clear effects in the divertor that occur when the RF power is increased. Clearly the divertor radiated power increses significantly with RF power and the level of divertor radiated power may be the deciding factor. Enhancing that radiated power as from shots 19 to 32 lessens the extent of reattachment during the RF pulse. Ultimately we appeared to have achieved our goals in this run. We spent the most time at a density of nl04=1.5e20 (shots 10-24) and varied the power from 0 to 1.5 MW. At the highest levels of power (1.5 MW, shot 19)the outer divertor plasma reattached (according to the divertor probes without support yet from the FSP). These powers into the main plasma raised the power flowing into the SOL from 0.5 to 1.25 MW (this number is derived from total input power minus the main radiated power - it does not include the fraction of divertor radiation inside the separatrix). We did not achieve full detachment at the next highest densities, 1.7 and 1.9e20. This was true even for RF powers up to 2.4 MW and P_SOL up to 2 MW. However we do feel that the divertor had reattached up to a region near the separatrix (within 2 mm). Late in the run (shot 32) we returned to nl04=1.5e20 and tried to reproduce the full reattachment of shot 19. This was not to be true according to the probes and the divertor bolometer emission profile. Even at higher input power we were still not able to reattach completely. This was also true (incomplete reattachment) for nl04=1.3e20 at P_RF=1.5 MW. There are 2 possible reasons for this lack of full reattachment during these high RF powers late in the run: (1) The separatrix position moved enough such that probe 4 ( the probe which did not reattach) is signifificantly into the private flux region. From comparison of 19 & 32 doesn't seem to bear this out; (2) The radiated power was significantly higher later in the run. This seems more likely. Viewing the SXR signal and the bolometry signals before the density rise and Rf pulse there was a large increase (0.35 to 0.6 MW on the main bolos) from 19 to shot 32. This could be due to changes in the magnetic configuration bringing more impurities in or due to the addition of Ar starting on shot 32. The separatrix location, inner and outer gaps were fairly constant (within mm) over the run from shot 19 on. The only significant change was the shifting of the second separatrix from SSEP of 0.9 to 1.3 mm. As for the addition of Ar only a small amount was puffed? The shot summary follows: shots1-4: test shots for alternator upgrade shot 5: shot went fine at nl04=0.5e20. Repeat to try and get EFIT going and a probe scan. shot 6: same, still waiting for EFIT so that FSP scan can be taken. Try again next shot. shot 7: nl04=0.5e20 with FSP scan. P_RF = 250 KW. shot 8: an ill wind is blowing. Now a power glitch caused the machine to vent. We will try to recover. shot lasted 200 ms or so. shot 9: fizzle shot 10: shot went ok, 200 kW RF, nl04=1.5e20, no FSP scan. shot 11: fizzle shot 12: 800 kW RF + probe scan. Having problems with x-point riding on inner divertor nose. shot 13: FSP scan but no RF unfortunately. Repeat again and try and hold RXL constant. shot 14: The position control was much better. No FSP scan. P_RF =1.25 MW. Disruption after RF turns off. shot 15: Big injection at .7 seconds kills plasma. Before injection there appears to be a slow detachment moving up the divertor plate from about .5 seconds on. This may be due to strike point movement. shot 16: RF tripped out midway through pulse. No FSP. Separatrix moved up to probe 4-5 region. shot 17: fizzle shot 18: RF tripped out again. Try again shot 19: 1.5 MW from D-port. FSP scan as well. shot 20: P_RF = 1.45 MW. FSP scan failed. It appears that the RF managed to reattach the plasma based solely on looking at the divertor probes. The pressures during the RF pulse are the same as pre-rf. The only difference in pressure profile is the absence of a 'dr' short for densified region or death ray. shot 21: P_RF about 1.4 MW. The P_SOL dropped from 1.5 MW last shot to 1.37 MW this shot. FSP scan this shot. shot 22: P_RF = 1.25 MW. P_SOL of order 1.1 MW. FSP scan as well. Big Mo injection at .86 seconds. shot 23: P_RF = 1.0 MW, FSP scan, Still detached. shot 24: fizzle shot 25: P_RF = 1.2 MW, FSP scan. Plasma does not appear to reattach. P_SOL of order 1.3 MW. nl04=1.7e20 starting this shot. shot 26: P_RF = 1.33 MW. FSP scan. P_SOL of order 1.35 - 1.4 MW. Still not really reattached although there is a pressure increase on some of the probes near the nose (6 & 7). nl04=1.7e20. shot 27: fizzle shot 28: P_RF = 2.0 MW, E-port has returned with 0.6 MW!. P_SOL of 1.75 MW and still does not look reattached below probe 6! FSP scan as well. nl04=1.7e20. shot 29: 2.4 MW total for 100 ms before D-port gives up. FSP scan. It looks like reattachment reaches probe 5 but still not complete reattachment. nl04=1.7e20. shot 30: Similar high power (2.4 MW) and similar effect on the divertor. nl04=1.7e20. shot 31: P_RF = 2.4 MW with FSP scan. P_SOL = 2 MW. nl04=1.9e20. Still not attached down through probe 4. However this shot does not seem to be very different than nl04=1.7e20. shot 32: nl04=1.5e20. P_RF=2 MW. FSP scan. Small Ar puff started this shot. However, it appears that, unlike shots 19 & 20 where the outer divertor appears to be reattached at 1.5 MW, we don't seemed to completely reattached the outer divertor for the same density but slightly more power? shot 33: ml04=1.3e20. P_RF = 1.5MW. FSP scan. Reattached from probe 5 up the divertor possibly. Ar still on. P_SOL = 1.5 MW. shot 34: P_RF = 1.35 MW. FSP scan. nl04=1.35e20., P_SOL = 1.4 MW. not completely reattached. shot 35: P_RF = 1.24 MW. FSP scan, nl04=1.3e20, P_SOL = 1.4 MW, not completely reattached.

Physics Operator Summaries

Entered: Jul 7 2004 04:36:54:100PM

Author: To Be Determined

Physics operator summary for 950502 EO: Bertolino/Daigle PO: Goetz SL: Lipschultz Run 950502 was in support of Mini-Proposal #073 - Effect of RF Heating on Divertor Detachment Characteristics. The goal of this mini-proposal is to study the dependence of the divertor detachment threshold characteristics on the input power. Program for this run: - Setup a lower SN discharge with outer gap 1.5-2.0cm and achieve a detached divertor - Step the RF (shot-to-shot) injected power (0.15MW x 0.2sec) and determine the necessary power for reattachment - Perform a density scan (NL04 = 1.5e20, 1.7e20, 1.9e20, and 1.3e20) This program was carried out. See the Session Leader's summary to find out the details of how this program was carried out. Some things discovered today: 1) Before the machine vent, the current rise rate was >= 0.1MA/.03sec. After the vent, the fastest rate was 0.08MA/.03sec, with most rates being <= 0.06MA/.03sec. Coincident with these observations is the fact that the CII light levels were at least 2x the pre-vent level during the startup phase. On shots 33-35 the current ramp rate and the level of CII finally returned to the pre-vent values (these three were very good ramp-ups). 2) The TF start time was changed to -1.0sec prior to shot 950502006 because with the new alternator control board, the TF supply was reaching flat-top earlier. In the interest of less magnet heating, the start time was changed. If an old shot is used, request from engineering a TF start time of -1.0sec. 3) A combination of STRKPSI and RXL was used today in order to provide satisfactory target plasmas for the FSP and satisfactory strike point location required by the Mini-proposal. The gains settled on were 100 for STRKPSI and 75 for RXL (in physics PID units). The x-point still drifted down and in after 0.8sec but the plasmas remained satisfactory. 4) The EF2's were brought off the current rail by slowing down the CLEARIN ramp, thus sacrificing the early divertor geometry. A nice single null is still achieved by 0.5sec. 5) The pressure in the A_SIDE plenum needed to be increased throughout the day to help the piezo valve achieve the requested densities. So, keep an eye on the feedback scope to see if the valve is being railed. 6) The voltage available out of the EF1 supplies was at least 200V - see shot 950502031 for example. Engineering, computing, and diagnostics today: New alternator control board tested this morning. All seems to working. The voltage droop is less than usual and the voltage remains 'flat' while the alternator is under load. Power glitch in the cell: machine vented to >30mTorr and HEAT wouldn't reset so the wall temperature dropped to 8 degrees. No data acquisition problems today. Scorecard: 35 shots = 4 tests + 26 plasmas + 5 fizzles Shot summary for Run 950502: Reload of 950428010 NL_04 = 0.5e20 ZXL = -.008 STRKPSI on probe 2 [(R,Z) = (0.624, -.540)] copied ramp down from 950413020 store FSP/RXL control in segment 4 (segment 2 from 950405020) Shot change result ____ _____ ______ 1-3 test of new alternator control board - board is working fine; the droop in voltage is less than a comparable shot from last week and the voltage remains 'flat' while the alternator is under load 4 OH stack test all o.k. 5 see above plasma - disr. @1.55 EF2's near the rail at crossover 6 ramp down IP faster; ramp out CLEARIN plasma - disr. @ 1.48 more slowly; TF start time = -1.0sec EF2's near rail @ 0.4sec 7 slow down CLEARIN ramp out plasma - disr. @ 1.47 EF2's off the rail 8 NL04=1.5e20; ZXL P gain = 4; power plasma - disr. @ 0.224 glitch - machine vents to >30mT and very dirty; hard x-rays walls down to 8 degrees 9 P_0 = 2.2e-5 fizzle - b.d. @ .005 bounces @ .014 - no current rise 10 P_0 = 1.8e-5 plasma - disr. @ 1.28 current rise is slow 11 NL04 at max @ 0.5sec fizzle - b.d. @ .005 no current rise - CII = .008 12 no changes plasma - disr. @ 1.45 almost didn't make it 13 turn ZXL gain down to 2 and turn RXL plasma - disr. @ 1.45 gain up to 1.5 at 0.5sec CII = .006; hard x-rays 14 RXL gain to 50 (physics PID) plasma - disr. @ 1.04 vert. osc. @ 0.99; RXL gain turns off abruptly 15 RXL gain to 100 (PID) and stairstep plasma - disr. @ 0.72 off; CLEARIN = +1e-3 Mo injection; lots of hards 16 RXL=+.007 and gain=75; P_0=2.1e-5; plasma - disr. @ 1.23 CLEARIN=0 17 ZXL=0 fizzle - CII light=.006 18 no changes plasma - disr. @ 1.19 19 no changes plasma - disr. @ 1.41 ZXL still drifting 20 ZXU gain=17.5; RXU=-.075; ramp ZXL plasma - disr. @ 1.42 21 ZXU gain=22.5; RXU = -.05 plasma - disr. @ 1.43 22 no changes plasma - disr. @ 1.41 23 no changes plasma - disr. @ 1.42 24 NL04=1.7e20; RCUR=0.665 fizzle - b.d. @ .007 - CII=.005 25 no changes plasma - disr. @ 1.41 NL04=1.7e20 @ 0.73 26 20.5PSIA D2 in A_SIDE plasma - disr. @ 1.25 NL04=1.7e20 @ 0.67 27 no changes fizzle - b.d. @ .007 28 P_0 = 1.9e-5 plasma - disr. @ 1.41 29 no changes plasma - disr. @ 1.42 current rise better 30 P_0 = 1.8e-5 plasma - disr. @ 1.42 current rise o.k. 31 NL04 = 1.9e20 plasma - disr. @ 1.23 NL04=1.9e20 @ 0.75sec 32 NL04=1.5e20; enable B_SIDE_LOWER plasma - disr. @ 1.44 NL04=1.5e20 @ 0.57sec 33 NL04=1.3e20 plasma - disr. @ 1.41 NL04=1.3e20 @ 0.55sec 34 no changes plasma - disr. @ 1.43 35 no changes plasma - disr. @ 1.44

Session Leader Comments
May 2 1995 08:27:24:460AM		Bruce Lipschultz	run 950502: engineering operator: V. Bertolino Physics operator: J. Goetz Session leader BLip Mini proposal #73: Effect of RF on Detachment The primary purpose of this run is to control the power flowing into the SOL (using RF) independent of the plasma current. Using this control we will search for the detachment threshold and characteristics as a function of SOL power. In addition we will monitor the radiated power in the divertor and the source rates for different impurities at the first-wall surfaces (CHromex spectrograph). The McPherson spectrograph will be utilized to to monitor the UV emission from the x-point region. We plan to step the RF power down from a maximum level shot to shot (in 100 - 150 KW steps) at fixed density. The density will be changed after each power scan. nl04 = 1.5e20, 1.7e20, 1.9e20 and 1.3e20 if time remains.
May 2 1995 09:21:38:010AM	950502005	Bruce Lipschultz	shot 5: shot went fine at nl04=0.5e20. Repeat to try and get EFIT going and a probe scan.
May 2 1995 09:36:11:410AM	950502006	Bruce Lipschultz	shot 6: same, still waiting for EFIT so that FSP scan can be taken. Try again next shot.
May 2 1995 10:01:23:900AM	950502006	Bruce Lipschultz	shot 7: nl04=0.5e20 with FSP scan. P_RF = 250 KW.
May 2 1995 10:52:06:360AM	950502008	Bruce Lipschultz	shot 8: an ill wind is blowing. Now a power glitch caused the machine to vent. We will try to recover. shot lasted 200 ms or so.
May 2 1995 11:02:23:410AM	950502010	Bruce Lipschultz	shot 9: fizzle shot 10: shot went ok, 200 kW RF, nl04=1.5e20, no FSP scan.
May 2 1995 11:31:04:660AM	950502012	Bruce Lipschultz	shot 11: fizzle shot 12: 800 kW RF + probe scan. Having problems with x-point riding on inner divertor nose.
May 2 1995 11:49:09:010AM	950502013	Bruce Lipschultz	shot 13: FSP scan but no RF unfortunately. Repeat again and try and hold RXL constant.
May 2 1995 12:12:22:280PM	950502014	Bruce Lipschultz	shot 14: The position control was much better. No FSP scan. P_RF =1.25 MW.
May 2 1995 12:27:53:040PM	950502015	Bruce Lipschultz	shot 15: Big injection at .7 seconds kills plasma. Before injection there appears to be a slow detachment moving up the divertor plate from about .5 seconds on. This may be due to strike point movement.
May 2 1995 01:05:27:820PM	950502016	Bruce Lipschultz	shot 16: RF tripped out midway through pulse. No FSP. Separatrix moved up to probe 4-5 region.
May 2 1995 01:14:49:030PM	950502018	Bruce Lipschultz	shot 17: fizzle shot 18: RF tripped out again. Try again
May 2 1995 01:26:44:630PM	950502019	Bruce Lipschultz	shot 19: 1.5 MW from D-port. FSP scan as well.
May 2 1995 01:43:10:160PM	950502020	Bruce Lipschultz	shot 20: P_RF = 1.45 MW. FSP scan ok. It appears that the RF managed to reattach the plasma based solely on looking at the divertor probes. The pressures during the RF pulse are the same as pre-rf. The only difference in pressure profile is the absence of a 'dr' short for densified region or death ray.
May 2 1995 01:59:15:410PM	950502021	Bruce Lipschultz	shot 21: P_RF about 1.4 MW. The P_SOL dropped from 1.5 MW last shot to 1.37 MW this shot. FSP scan this shot.
May 2 1995 02:18:46:980PM	950502022	Bruce Lipschultz	shot 22: P_RF = 1.25 MW. P_SOL of order 1.1 MW. FSP scan as well.
May 2 1995 02:38:31:120PM	950502023	Bruce Lipschultz	shot 23: P_RF = 1.0 MW, FSP scan, Still detached.
May 2 1995 02:38:51:280PM	950502024	Bruce Lipschultz	shot 24: fizzle
May 2 1995 02:56:37:710PM	950502025	Bruce Lipschultz	shot 25: P_RF = 1.2 MW, FSP scan. Plasma does not appear to reattach. P_SOL of order 1.3 MW.
May 2 1995 03:14:29:310PM	950502026	Bruce Lipschultz	shot 26: P_RF = 1.33 MW. FSP scan. P_SOL of order 1.35 - 1.4 MW. Still not really reattached although there is a pressure increase on some of the probes near the nose (6 & 7).
May 2 1995 03:14:50:150PM	950502027	Bruce Lipschultz	shot 27: fizzle
May 2 1995 03:35:34:830PM	950502028	Bruce Lipschultz	shot 28: P_RF = 2.0 MW, E-port has returned with 0.6 MW!. P_SOL of 1.75 MW and still does not look reattached below probe 6! FSP scan as well.
May 2 1995 04:09:09:130PM	950502029	Bruce Lipschultz	shot 29: 2.4 MW total for 100 ms before D-port gives up. FSP scan. It looks like reattachment reaches probe 5 but still not complete reattachment.
May 2 1995 04:34:54:430PM	950502031	Bruce Lipschultz	shot 31: P_RF = 2.4 MW with FSP scan. P_SOL = 2 MW. nl04=1.9e20. Still not attached down through probe 4. However this shot does not seem to be very different than nl04=1.7e20.
May 2 1995 04:39:52:600PM	950502032	Bruce Lipschultz	shot 32: nl04=1.5e20. P_RF=2 MW. FSP scan. Small Ar puff started this shot. However, it appears that, unlike shots 19 & 20 where the outer divertor appears to be reattached at 1.5 MW, we don't seemed to completely reattached the outer divertor for the same density but slightly more power?
May 2 1995 04:54:14:300PM	950502033	Bruce Lipschultz	shot 33: ml04=1.3e20. P_RF = 1.6MW. FSP scan
May 2 1995 06:30:01:000PM	950502033	Bruce Lipschultz	shot 33: ml04=1.3e20. P_RF = 1.5MW. FSP scan. Reattached from probe 5 up the divertor possibly. Ar still on.
May 2 1995 06:35:31:550PM	950502034	Bruce Lipschultz	shot 34: P_RF = 1.35 MW. FSP scan. nl04=1.35e20., P_SOL = 1.4 MW. not completely reattached.
May 2 1995 06:35:53:960PM	950502035	Bruce Lipschultz	shot 35: P_RF = 1.24 MW. FSP scan, nl04=1.3e20, P_SOL = 1.4 MW, not completely reattached.

Physics Operator Comments
May 2 1995 08:19:35:040AM		John Goetz	Run 950502 MiniProposal #073 - Effect of RF Heating on Divertor Detachment Characteristics The goal of this mini-proposal is to study the dependence of the divertor detachment threshold characteristics on the input power. Run plan: 1) Obtain starting shot - acceptable for RF, FSP, and edge physics studies 2) At densities of NL04 = 1.5e20, 1.7e20, 1.9e20, and 1.3e20, step RF power down from maximum in 0.15MW, 0.2 sec steps
May 2 1995 08:44:34:980AM	950502001	John Goetz	Shot 950502001 test of new alternator control board TF current is 50kA Results: looks o.k.
May 2 1995 08:44:46:680AM	950502002	John Goetz	Shot 950502002: test of new alternator control board TF current is 100kA Results: looks o.k.
May 2 1995 08:44:59:380AM	950502003	John Goetz	Shot 950502003: test of new alternator control board TF current is 150kA Results: looks o.k.
May 2 1995 08:45:13:240AM	950502004	John Goetz	Shot 950502004: test of OH stack Results: looks o.k.
May 2 1995 08:59:38:260AM	950502005	John Goetz	Shot 950502005: Shot 950502005 Start with 950428010 STRKPSI on probe 2 [(R,Z) = (0.624,-.540)] NL04 = 0.5e20 ZXL = -.008 copied ramp down from 950413020 store FSP/RXL control in segment 4 (segment 2 from 950405020) Results: plasma - disrupts @ 1.55 EF2's near the rail @ cross-over time
May 2 1995 09:20:20:140AM	950502006	John Goetz	Shot 950502006: ramp down Ip faster slow down CLEARIN ramp out (to save EF2) TF start time to -1.0sec (new alternator control board allows TF to flattop earlier) Results: plasma - disrupts @ 1.48 EF2's near rail @ 0.4sec
May 2 1995 09:56:57:590AM	950502007	John Goetz	Shot 950502007: slow down CLEARIN ramp out (to save EF2) Results: plasma - disr. @ 1.47 EF2's away from the rail; kappa bump is smaller
May 2 1995 10:35:32:780AM	950502008	John Goetz	Shot 950502008: NL04 = 1.5e20 ZXL gain = 4 power glitch - machine vented to >30mTorr HEAT would not reset - avg temp down to 8 degree Results: plasma - disrupts @ 0.224 very dirty - lots of power radiated hard x-rays also
May 2 1995 10:44:58:960AM	950502009	John Goetz	Shot 950502009: P_0 = 2.2e-5 Results: fizzle - breakdown at .005 bounces @ .014 - current never rises no CII data available
May 2 1995 11:01:28:150AM	950502010	John Goetz	Shot 950502010: P_0 = 1.8e-5 Results: plasma - disrupts @ 1.28 current rise was slow; CII was > .004 requested density obtained, but not fast enough
May 2 1995 11:06:56:170AM	950502011	John Goetz	Shot 950502011: NL04 at its maximum @ 0.5sec; start ramp @ 0.425 Results: fizzle - breakdown @ .005 null looks o.k. CII light = .008 mW/cm^2/st
May 2 1995 11:29:36:100AM	950502012	John Goetz	Shot 950502012: no changes Results: plasma - disrupts @ 1.45 - makes it through a shark fin breakdown @ .005 - bounce @ .029 - CII > .004
May 2 1995 11:48:15:120AM	950502013	John Goetz	Shot 950502013: turn ZXL gain down to 2 and RXL gain up to 1.5 @ 0.5 Results: plasma - disrupts @ 1.45 - current rise is slow Mo injection @ 0.66sec quite a few hards on this one
May 2 1995 12:06:45:040PM	950502014	John Goetz	Shot 950502014: turn RXL gain up to 50 (physics PID) Results: plasma - disrupts @ 1.04 - goes up vertical oscillation beginning @ 0.99sec - kappa = 1.7 RXL gain goes from 50 to 0 @ 0.988sec - gives a kick to the EF2s
May 2 1995 12:21:17:770PM	950502015	John Goetz	Shot 950502015: turn RXL gain up to 100 (physics PID) and stairstep it off Results: plasma - disrupts @ 0.72 Mo injection @ 0.7 causes the current to roll over a whole lot of hard x-rays on this shot
May 2 1995 12:46:55:140PM	950502016	John Goetz	Shot 950502016: CLEARIN = 0e-3 P_0 = 2.1e-5 RXL gain to 75 and RXL = +.007 Results: plasma - disrupts @ 1.23 bounces @ .025 - current rise still slow elongation is high and ZXL is now very low
May 2 1995 01:10:16:140PM	950502017	John Goetz	Shot 950502017: ZXL = 0. Results: fizzle - null looks o.k. CII = .006
May 2 1995 01:11:05:380PM	950502018	John Goetz	Shot 950502018: no changes Results: plasma - disrupts @ 1.19 target acceptable for FSP
May 2 1995 01:22:52:360PM	950502019	John Goetz	Shot 950502019: no changes Results: plasma - disrupts @ 1.41 still losing ZXL beginning @ 0.8sec SSEP < 10mm
May 2 1995 01:41:40:940PM	950502020	John Goetz	Shot 950502020: ramp ZXL up to try and hold it steady ZXU gain = 17.5 (physics PID) RXU = -.075 Results: plasma - disrupts @ 1.42 SSEP = 12.5mm ZXL drooping but not as badly
May 2 1995 01:56:39:240PM	950502021	John Goetz	Shot 950502021: ZXU gain = 22.5 (physics PID) RXU = -.05 Results: plasma - disrupts @ 1.43 best FSP target of the day
May 2 1995 02:27:46:910PM	950502022	John Goetz	Shot 950502022: no changes Results: plasma - disrupts @ 1.42
May 2 1995 02:29:27:730PM	950502023	John Goetz	Shot 950502023: no changes Results: plasma - dsirupts @ 1.42
May 2 1995 02:38:09:700PM	950502024	John Goetz	Shot 950502024: NL04 = 1.7e20 RCUR = 0.665 Results: fizzle - breakdown @ .005 - CII=.005 null looks normal
May 2 1995 02:51:24:030PM	950502025	John Goetz	Shot 950502025: no changes Results: plasma - disrupts @ 1.41 NL04=1.7e20 @ 0.73
May 2 1995 03:10:11:260PM	950502026	John Goetz	Shot 950502026: 20.5PSIA of deuterium in A_SIDE Results: plasma - disrupts @ 1.25 NL04 = 1.7e20 @ 0.67sec
May 2 1995 03:19:20:810PM	950502027	John Goetz	Shot 950502027: no changes Results: fizzle - breakdown @ .007 null looks o.k.; CII light = .0045
May 2 1995 03:34:12:230PM	950502028	John Goetz	Shot 950502028: P_0 = 1.9e-5 Results: plasma - disrupts @ 1.41 current rise is still slow
May 2 1995 03:45:38:510PM	950502029	John Goetz	Shot 950502029: no changes Results: plasma - disrupts @ 1.42 current rise is better - makes it to .08MA @ .03sec
May 2 1995 04:03:26:320PM	950502030	John Goetz	Shot 950502030: P_0 = 1.8e-5 Results: plasma - disrupts @ 1.42 current rise o.k.
May 2 1995 04:18:03:430PM	950502031	John Goetz	Shot 950502031: NL04 = 1.9e20 Results: plasma - disrupts @ 1.23 NL04 = 1.9e20 @ 0.75sec Mo injection @ 0.46 current rise is poor
May 2 1995 04:34:55:990PM	950502032	John Goetz	Shot 950502032: NL04 = 1.5e20 hybrid enable B_SIDE_LOWER Results: plasma - disrupts @ 1.44 NL04 = 1.5e20 @ 0.57sec better current rise
May 2 1995 04:47:08:950PM	950502033	John Goetz	Shot 950502033: NL04 = 1.3e20 Results: plasma - disrupts @ 1.41sec NL04=1.3e20 @ 0.55sec best current rise since the machine vent
May 2 1995 05:02:39:930PM	950502034	John Goetz	Shot 950502034: no changes Results: plasma - disrupts @ 1.43 best current rise since shot 950502007
May 2 1995 05:07:15:770PM	950502035	John Goetz	Shot 950502035: no changes Results: plasma - disrupts @ 1.44 good current rise

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:01:43:990AM	Test	Ok
2	08:18:00:600AM	Test	Ok
3	08:25:50:490AM	Test	Ok
4	08:34:38:340AM	Test	Ok
5	08:44:34:680AM	Plasma	Ok
6	09:08:14:030AM	Plasma	Ok	no faults
7	09:22:26:590AM	Plasma	Ok
8	10:26:09:330AM	Plasma	Ok
9	10:35:44:440AM	Plasma	Ok
10	10:46:10:370AM	Plasma	Ok
11	11:01:27:400AM	Plasma	Ok
12	11:11:23:380AM	Plasma	Ok
13	11:31:02:240AM	Plasma	Ok
14	11:49:28:530AM	Plasma	Ok
15	12:09:58:430PM	Plasma	Ok
16	12:28:17:910PM	Plasma	Ok
17	12:48:16:890PM	Plasma	Ok
18	12:58:16:550PM	Plasma	Ok
19	01:11:00:060PM	Plasma	Ok	No Faults
20	01:26:37:220PM	Plasma	Ok	No faults.
21	01:43:16:470PM	Plasma	Ok	No Faults.
22	01:57:13:370PM	Plasma	Ok	No Faults.
23	02:12:30:550PM	Plasma	Ok	No Faults.
24	02:30:12:100PM	Plasma	Ok	NO Faults
25	02:41:10:330PM	Plasma	Ok	No Faults.
26	02:55:29:100PM	Plasma	Ok	No Faults.
27	03:11:19:180PM	Plasma	Ok	No Faults
28	03:21:32:670PM	Plasma	Ok	No Faults
29	03:35:11:710PM	Plasma	Ok	No Faults.
30	03:51:06:990PM	Plasma	Ok	No Faults.
31	04:06:49:670PM	Plasma	Ok	No Faults.
32	04:21:25:550PM	Plasma	Ok	No Faults.
33	04:37:10:770PM	Plasma	Ok	no faults
34	04:48:32:920PM	Plasma	Ok	No Faults.
35	05:00:36:750PM	Plasma	Ok	No Faults.