| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Brian Labombard,Bruce Lipschultz |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Parkin,Gary Dekow,Bill Cochran |
| Engineering Operator Run Comment |
| Evaluation of Machine Conditioning, MP 228 Scape off Layer Transport Stu |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:24:930PM |
| Author: To Be Determined |
| #38 of 43 CMOD Date: 25-SEP-2000 18:19 Expires: 9-OCT-2000 00:00 From: RHONE::BLIP Subj: run summary 1000925 Run 1000925 Physop: Steve Wolfe Session leader: B. Lipschultz/B. LaBombard for MP228 Eng. operator: Bill Cochrane Primary goal: Get the machine running discharges. Evaluate cleanliness and best options for recovery. Secondary goal: We hope to eke out a gap scan. The need is for a well-defined scan of the outer gap and density, keeping other conditions constant (inner gap, outer divertor conditions...). We will be taking data with the 2 scanning probes, the limiter flux probes, pressure gauges and so on. With this data we will not only be able to evaluate the effect of outer gap on the midplane pressure, but also understand if there are any effect on the transport in the SOL that correspond (assuming changes in the midplane pressure). The first goal was certainly achieved. We got plasma on the first shot (#2 I believe) and continued on from there. There was a hiatus to take care of the Ratiomatic gauge at G-side which was not operating. That was fixed. When a new gauge is installed the gauge pressure tends to vary for the next 4-8 hours. We tried to compensate for this by recalibrating as we went along through the day. Regarding the effect of the outer gap: We found that the midplane pressure did NOT seem to be affected by the outer gap! In addition, it appeared that the plasma parameters at the plate were unaffected as well! The flux to the limiter increased by ~x10 in going from 2.4 cm gap to 0. We are not sure how to reconcile all of this at the moment. Is the outer limiter really acting as a proper limiter? If not this would explain the lack of gap effect on the divertor plasma (We have not looked at the general SOL profile from the F-scanning probe yet), In the final several shots we limited the plasma on the inner wall (24-25) and made the outer gap -6 mm (shot 26). Looking at shots 25, 26, 18 and 10, where the outer gap was 12 (but inner wall limited), -5, 0, and 24 did seem to indicate that there was a variation of midplane pressure with gap, but it was small - factor of 2. In the case where the outer gap was -6 mm we did see the divertor pressure drop and some effect density in the divertor, but not large. In summary, alot of interesting data, but no obvious meaning. Shot summary: shot 4: Ratiomatic now working. Calibrated after shot 3. Gaps look good until current inversion. Unfortunately the gaps increase then and the plasma disrupts during inversion. Strike point position ~ probe 3. shot 5: midplane pressure .06 mT. Outer gap 2.3 cm. Inner gap 1.5 cm. nl04 varying from 7.2 to 8.3e19. shot 6: outer gap 2.2 cm. nl04 = 6-8e19 over the shot. Midplane pressure .04 - .05 mT over the shot. shot 7: disrupted early on. shot 8: disrupted again. shot 9: 0.55-0.6e20. Outer gap ~ 2.4 cm. midplane pressure ~ .03 mT. shot 10: 0.95e20. Outer gap ~ 2.5-2.6 cm. midplane pressure .1-.2 mT. injection at .827 sec raises the midplane pressure from .13 - .18 mT. shot 11: 1.2-1.35e20. Outer gap ~ 2.5-2.7 cm. midplane pressure .5-1.36 mT. Brian's probe scan (FSP) poor, try again. shot 12: no plasma shot 13: 1.3-1.6e20. Outer gap ~ 2.7 cm. midplane pressure .6-2.2 mT. For some reason the midplane presure, and the G/H flux stop rising after divertor detachment? shot 14: interferometer died causing the gas valve to be wide open and a disruption. Comparison of the Thomson ne this shot to last indicates that nl04 similar - 1.5-1.6e20. midplane pressure 1.7 m shot 15: no plasma. shot 16: outer gap .6 cm. nl04 =1.5-1.7. Midplane pressure 1.3-2.2 mT. shot 17: outer gap 0 cm. nl04 =1.5-1.6. Midplane pressure 1.0-1.6 mT. shot 18: outer gap 0 cm. nl04 =1.09e20. Midplane pressure .3-.36 mT. shot 19: outer gap 0 cm. nl04 =.7-.85e20. Midplane pressure .08-.12 mT. shot 20: outer gap 0 cm. nl04 =.65-0.8e20. Midplane pressure .06-.11 mT. shot 21: outer gap 1.2 cm. nl04 =.6e20. Midplane pressure .035 mT. shot 22: outer gap 1.2 cm. nl04 =1.0e20. Midplane pressure .2-.3 mT. shot 23: outer gap 1.2 cm. nl04 =1.5e20. Midplane pressure .9-2. mT. shot 24: INNER GAP CHANGE to 0 cm. outer gap 2.0 cm. nl04 =1.0e20. Midplane pressure .16-.19 mT. shot 25: INNER GAP CHANGE to 0 cm. outer gap 2.0 cm. nl04 =1.1e20. Midplane pressure .19-.27 mT. shot 26: INNER GAP CHANGE to 1.5 cm. outer gap -0.6 cm. nl04 =1.1-1.17e20. Midplane pressure .3-.45 mT. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:12:100PM |
| Author: To Be Determined |
| Physics Operator Summary for Monday, Sept 25 MP#228 Scrape-off Layer Transport Studies/Outer gap scan SL: B. Labombard/B. Lipschultz PO: S. Wolfe EO: Cochran, Parkin, Dekow Run plan --------- Experiments: 1. Evaluation of Machine Conditioning 2. If feasible, MP 228 -- Scrape-off Layer Transport Studies/Outer gap scan Engineering setup: ------------------- Over the weekend ECDC in D2, stopping 1-2 hours prior to run Run begins at 9:30 (earlier if possible), and ends at 17:00 Power System as on 1000831021 except EFc voltage to 900V. *Note EFc start time should be -.03 sec (Ian's early zcur control). Also, note that the EF2 ballast resistors have been changed; they should now be entered as EF2U RComm/Ballast=42.08 EF2L RComm/Ballast=42.49 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, available ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB is out of commission. Do NOT Enable its gate valve! Run Plan: ---------- The first priority will be to evaluate how well the machine has recovered from the vacuum incident last week. Key indicators are plasma cleanliness, ability to run low and moderate-high density, and H/D ratio. Depending on results, boronization may be scheduled for Monday night. Assuming that the cleanliness and density range are suitable, we will attempt to complete the experiments on recycling vs gaps and density called for in the following plan. Otherwise, we'll either run clean-up shots, or go to ECDC. MP228 Goals: Use FSP, ASP, and limiter flux probes to record profiles into the limiter shadow, studying the movement of recycling from the top of the divertor to the midplane limiter surfaces as the outer gap is changed. All shots are 1 MA, 5.3 T, lower single null (or outboard limited) with inboard gap of ~15mm. Flattop will be shortened to t=1.2 s. Shot sequence: 1) Load a 1MA, 5.3T shot, with outer gap about 20mm, inner gap ~15mm. Lower plasma center and increase upper x-point height to reduce elongation, then increase outer gap to ~24mm. It will take several shots to tune up gaps, probe positions, strike points, density. 2) Outer gap = 2.4 cm, NL_04=0.6, 0.9, 1.3, 1.7e20 m-2 3) Outer gap = "0" cm, NL_04=1.7, 1.3, 0.9, 0.6e20 m-2 4) Outer gap = 1.2 cm, NL_04=0.6, 0.9, 1.3, 1.7e20 m-2 ------------------------------------------------------------------------------- PCS setup for first shot: Load seg 2 from 1000914020, a 1MA, nl4=6e19 shot, and tweak as follows: Rcur from .661->.656 IP ramp down from 1.2 to 1.7sec. density ramp-down to 1.2 zcur to -.02, ramp back up slowly after 1.2sec zxu from 0.048 -> .058 ic_ef4 ramp down at 1.2sec tf from -151ka->-150kA, ramp down at 1.2sec reduce pg3 maint level to 0 after .35 sec change strkpsi waveform to 0.0; do not turn on. change fsp waveform to 0.0; do not turn on. Load seg 1 from 1000831021, change BR0 offset to 0.001, IC_EF4 to -1290 PG4 to 17msec -------------------------------------------------------------------- Results: -------- The alternator was actually ready at 9:00, but we had some delays to work on the ratiomatic before and after the first shots. The ratiomatic gauge, which had failed following the loss of vacuum last week, was necessary for the midplane pressure measurements for the MP228 experiment; it was fixed for shot #3, and calibrated during the run. It is still not clear what was wrong with it. The run was reasonably successful; we ended up with only three densities at each gap, rather than four, but we did an inner limiter case as well. The results were not what was expected by the proposers, but the data look good. Brian claims "Out of confusion come deeper understanding." The H/D ratio never got significantly below 0.2, even for the highest density. Therefore, the boronization was postponed until at least Tuesday night. Details: ------- Shot#1 was a TF test, since work had been done in the TF supplies since the last run. This was successful. Shots #2-8 were used for setting up a satisfactory target, including density, FSP target and strike point, with an outer gap of ~25mm. Shots #9-14 were a density scan at large outer gap, ~25mm Shots #16-20 scanned density down with "0" outer gap Shots #21-23 scanned density up with 12mm outer gap. Shots #24-25 were back at nl4=1.0e20 run on the inboard limiter Shot #26 was a repeat of shot 18, but pushed 6mm further out to make sure it is hard limited on the outside. Aside for the high H/D ratio, and a somewhat more restricted range of density than desired (we only got .7 - 1.5e20, rather than .6-1.7), the machine ran pretty well today, considering it was the first run after last week's vacuum accident. There was one power system induced dud when the OH2 commutation switches failed to close (shot#12), and one fizzle (shot#15) foloowing a full current disruption. There were also a couple of early disruptions, which seemed to be due to moly injections. There were also a number of vertical position thrashes which I was unable to eliminate, and the high density shots tended to disrupt in rampdown. Some tweaking of RXL and ZXL was required during the day to maintain the strikepoints and FSP target. The specialized controllers STRKPSI and FSP were not turned on. The RF group was able to do a little bit of piggybacking at the tail end of the last group of shots, in preparation for tomorrow's run. Scorecard: --------- Tests 1 Duds 1 Fizzles 1 Plasmas 23 ------- -- Shots 26 |
| Session Leader Comments | |||
| Sep 25 2000 09:42:58:373AM | Bruce Lipschultz | Run 1000925 Physop: Steve Wolfe Session leader: B. Lipschultz/B. LaBombard for MP228 Eng. operator: Bill Cochrane Primary goal: Get the machine running discharges. Evaluate cleanliness and best options for recovery. Secondary goal: We hope to eke out a gap scan. The need is for a well-defined scan of the outer gap and density, keeping other conditions constant (inner gap, outer divertor conditions...). We will be taking data with the 2 scanning probes, the limiter flux probes, pressure gauges and so on. With this data we will not only be able to evaluate the effect of outer gap on the midplane pressure, but also understand if there are any effect on the transport in the SOL that correspond (assuming changes in the midplane pressure). | |
| Sep 25 2000 10:45:41:873AM | 1000925004 | Bruce Lipschultz | shot 4: Ratiomatic now working. Calibrated after shot 3. Gaps look good until current inversion. Unfortunately the gaps increase then and the plasma disrupts during inversion. Strike point position ~ probe 3. |
| Sep 25 2000 05:28:19:483PM | 1000925005 | Bruce Lipschultz | shot 5: midplane pressure .06 mT. Outer gap 2.3 cm. Inner gap 1.5 cm. nl04 varying from 7.2 to 8.3e19. |
| Sep 25 2000 05:28:49:013PM | 1000925006 | Bruce Lipschultz | shot 6: outer gap 2.2 cm. nl04 = 6-8e19 over the shot. Midplane pressure .04 - .05 mT over the shot. |
| Sep 25 2000 03:32:03:373PM | 1000925007 | Bruce Lipschultz | shot 7: disrupted early on. |
| Sep 25 2000 03:31:47:293PM | 1000925008 | Bruce Lipschultz | shot 8: disrupted again. |
| Sep 25 2000 03:31:28:827PM | 1000925009 | Bruce Lipschultz | shot 9: 0.55-0.6e20. Outer gap ~ 2.4 cm. midplane pressure ~ .03 mT. |
| Sep 25 2000 03:31:15:793PM | 1000925010 | Bruce Lipschultz | shot 10: 0.95e20. Outer gap ~ 2.5-2.6 cm. midplane pressure .1-.2 mT. injection at .827 sec raises the midplane pressure from .13 - .18 mT. |
| Sep 25 2000 03:31:01:140PM | 1000925011 | Bruce Lipschultz | shot 11: 1.2-1.35e20. Outer gap ~ 2.5-2.7 cm. midplane pressure .5-1.36 mT. Brian's probe scan (FSP) poor, try again. |
| Sep 25 2000 03:30:27:890PM | 1000925012 | Bruce Lipschultz | shot 12: no plasma |
| Sep 25 2000 03:30:11:920PM | 1000925013 | Bruce Lipschultz | shot 13: 1.3-1.6e20. Outer gap ~ 2.7 cm. midplane pressure .6-2.2 mT. For some reason the midplane presure, and the G/H flux stop rising after divertor detachment? |
| Sep 25 2000 03:28:28:793PM | 1000925014 | Bruce Lipschultz | shot 14: interferometer died causing the gas valve to be wide open and a disruption. Comparison of the Thomson ne this shot to last indicates that nl04 similar - 1.5-1.6e20. midplane pressure 1.7 mT. |
| Sep 25 2000 03:27:40:250PM | 1000925015 | Bruce Lipschultz | shot 15: no plasma. |
| Sep 25 2000 02:15:42:403PM | 1000925016 | Bruce Lipschultz | shot 16: outer gap .6 cm. nl04 =1.5-1.7. Midplane pressure 1.3-2.2 mT. |
| Sep 25 2000 02:33:27:280PM | 1000925017 | Bruce Lipschultz | shot 17: outer gap 0 cm. nl04 =1.5-1.6. Midplane pressure 1.0-1.6 mT. |
| Sep 25 2000 02:58:26:373PM | 1000925018 | Bruce Lipschultz | shot 18: outer gap 0 cm. nl04 =1.09e20. Midplane pressure .3-.36 mT. |
| Sep 25 2000 03:16:28:530PM | 1000925019 | Bruce Lipschultz | shot 19: outer gap 0 cm. nl04 =.7-.85e20. Midplane pressure .08-.12 mT. |
| Sep 25 2000 03:34:23:250PM | 1000925020 | Bruce Lipschultz | shot 20: outer gap 0 cm. nl04 =.65-0.8e20. Midplane pressure .06-.11 mT. |
| Sep 25 2000 04:04:05:840PM | 1000925021 | Bruce Lipschultz | shot 21: outer gap 1.2 cm. nl04 =.6e20. Midplane pressure .035 mT. |
| Sep 25 2000 04:23:23:827PM | 1000925022 | Bruce Lipschultz | shot 22: outer gap 1.2 cm. nl04 =1.0e20. Midplane pressure .2-.3 mT. |
| Sep 25 2000 04:41:00:140PM | 1000925023 | Bruce Lipschultz | shot 23: outer gap 1.2 cm. nl04 =1.5e20. Midplane pressure .9-2. mT. |
| Sep 25 2000 05:11:42:450PM | 1000925024 | Bruce Lipschultz | shot 24: INNER GAP CHANGE to 0 cm. outer gap 2.0 cm. nl04 =1.0e20. Midplane pressure .16-.19 mT. |
| Sep 25 2000 05:27:28:890PM | 1000925025 | Bruce Lipschultz | shot 25: INNER GAP CHANGE to 0 cm. outer gap 2.0 cm. nl04 =1.1e20. Midplane pressure .19-.27 mT. |
| Sep 25 2000 05:53:16:937PM | 1000925026 | Bruce Lipschultz | shot 26: INNER GAP CHANGE to 1.5 cm. outer gap -0.6 cm. nl04 =1.1-1.17e20. Midplane pressure .3-.45 mT. |
| Physics Operator Comments | |||
| Sep 25 2000 07:39:07:450AM | Steve Wolfe | load previously prepared starting shot from pcs$wolfe:pcs_1000925000 do a remcam (just in case) coldstart 07:38 All matrices responding | |
| Sep 25 2000 08:18:21:950AM | Steve Wolfe | Run plan for Monday, 25 September 2000: Experiments: 1. Evaluation of Machine Conditioning 2. If feasible, MP 228 -- Scrape-off Layer Transport Studies/Outer gap scan Session leaders: B. Labombard/B. Lipschultz Physics operator: S. Wolfe Engineering setup: ------------------- Over the weekend ECDC in D2, stopping 1-2 hours prior to run Run begins at 9:30 (earlier if possible), and ends at 17:00 Power System as on 1000831021 except EFc voltage to 900V. *Note EFc start time should be -.03 sec (Ian's early zcur control). Also, note that the EF2 ballast resistors have been changed; they should now be entered as EF2U RComm/Ballast=42.08 EF2L RComm/Ballast=42.49 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, available ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB is out of commission. Do NOT Enable its gate valve! | |
| Sep 25 2000 09:31:00:000AM | 1000925001 | Steve Wolfe | shot#1: TF 50kA test Looks good. There is a problem with the ratiomatic, which unfortunately is needed for the MP#228 experiment. However, we will proceed to try to get plasma before continuing with repair efforts. |
| Sep 25 2000 10:03:57:280AM | 1000925002 | Steve Wolfe | shot#2: plasma attempt. Should be 1MA, 6e19, 2cm outer gap. plasma, full length. density is a bit high, at 7-8e19. A few runaways early. z-meter signal shows nothing, hesitation in startup. Br and Bz perhaps both a little negative, early current rise is slow. H/D ~ 20-30% right gap is 18-20mm, left 16-18mm, n/nc=1.1 Next shot: decrease rcur by 3mm, to .653; clearin .005->.003 BR0 from .001->.0015 Ratiomatic is being worked on in the cell. Z-meter camera was bumped; Earl has fixed it for next shot. |
| Sep 25 2000 10:27:22:310AM | 1000925003 | Steve Wolfe | shot#3: decrease rcur by 3mm, to .653; clearin .005->.003 BR0 from .001->.0015 Ratiomatic is now working again; although it may be a few hours for it to read correctly. Z-meter camera was bumped; Earl has fixed it for next shot. plasma, some vertical thrashes, but it survives. current rise is a little better, 45kA at 15msec. density is still at 7 - 8e19 H/D at 30%, over .5 after ijection at .96sec. right gap 22mm, left gap 15mm, n/nc=1.16 strike point is high, according to Blip. Next shot: rcur to .652, ramp EF4 down slowly at 1.2 (seems to be affecting EF2, clearin?) rxl in by 5mm. drop the pg3 early voltage a little. |
| Sep 25 2000 10:45:38:577AM | 1000925004 | Steve Wolfe | shot#4: rcur to .652, ramp EF4 down slowly at 1.2 (seems to be affecting EF2, clearin?) rxl in by 5mm. plasma, disrupted with a vertical instability at 1.33sec. Need to fix the rampdown. dithers from 1 sec on. n/nc=1.2 gaps look good. Next shot: ramp clearin in at inversion drop zcur by 5mm to -.025, move rxl in by 3mm |
| Sep 25 2000 11:04:54:890AM | 1000925005 | Steve Wolfe | shot#5: ramp clearin in at inversion drop zcur by 5mm to -.025, move rxl in by 3mm, faster after .8sec plasma, full length, there is a thrash at .26sec, otherwise ok. density is still running a bit high. next shot: Try dropping nl4 program, although the valve is already turning off at .5sec drop icef4 gain at 0.2 sec. |
| Sep 25 2000 11:18:53:030AM | 1000925006 | Steve Wolfe | shot#6: Try dropping nl4 program, although the valve is already turning off at .5sec drop icef4 gain at 0.2 sec to try to affect early thrash. plasma, full length. thrash is still there at .25 or so. nl4 still rising during pulse to 0.8e20; it's just coming in from the walls. next shot: move rcur in by 1.5mm, to .6505; gap had shrunk to 22mm, probably when I dropped zcur again. |
| Sep 25 2000 11:35:54:590AM | 1000925007 | Steve Wolfe | shot#7: move rcur in by 1.5mm, to .6505; gap had shrunk to 22mm, probably when I dropped zcur again. plasma disrupts at .35, the early thrash got it. JR says there was a moly injection then. next shot: try letting rcur swing out further, then back in by .5sec |
| Sep 25 2000 11:52:28:403AM | 1000925008 | Steve Wolfe | shot#8: try letting rcur swing out to .654, then back in by .5sec to .6505 Another early disruption. Let's not do this again! This one made it to .48, and had an injection; disrupts at .52. I don't see anything in programming or shape that could be causing it, but JR says this Mo injection has been there all day. next shot: repeat and cross your fingers |
| Sep 25 2000 12:08:09:543PM | 1000925009 | Steve Wolfe | shot#9: try again letting rcur swing out to .654, then back in by .5sec to .6505 plasma, full length. there are thrashes at .26, .41, and 1.36, but it makes it through injections at .537, 1.0, 1.35. Blip and Brian are relatively happy, go on to 0.97e20 |
| Sep 25 2000 12:28:04:263PM | 1000925010 | Steve Wolfe | shot#10: go on to nl4=0.97e20 plasma, to 1.58sec, some vertical thrashes in rampdown. injections at .69 and .82sec gap is a little bigger, and grows some in rampdown H/D ~.4 to .6 next shot: nl4=1.4 or so, maybe a little more agressive rampin on clearin in rampdown |
| Sep 25 2000 12:49:04:793PM | 1000925011 | Steve Wolfe | shot#11: nl4=1.4 or so, a little more faster ramp on clearin in rampdown disrupts at 1.4sec, got the density ok, need to work on the rampdown. next shot: ramp zxu down in ramp down also ramp zxl down to -.01 (was -.006) at 1.2sec, to try to stabilize fsp target. raise nl4 to 1.5e20 |
| Sep 25 2000 01:06:29:107PM | 1000925012 | Steve Wolfe | shot#12: ramp zxu down in ramp down also ramp zxl down to -.01 (was -.006) at 1.2sec, to try to stabilize fsp target. raise nl4 to 1.5e20 dud! Power supply problem on OH2U? Switches never closed on the OH2's. |
| Sep 25 2000 01:25:40:500PM | 1000925013 | Steve Wolfe | shot#13: ramp zxu down in ramp down also ramp zxl down to -.01 (was -.006) at 1.2sec, to try to stabilize fsp target. raise nl4 to 1.5e20, and raise pg3 maint level back to ~20V. plasma, disrupts at 1.23 sec, vertical instability growing from 1 sec looks like a poloidal detachment. Gas valve is wide open to .9 sec H/D is around .2 next shpt: repeat, ramp clearin harder in rampdown. |
| Sep 25 2000 01:37:23:013PM | 1000925014 | Steve Wolfe | shot#14: repeat, ramp clearin harder in rampdown. another disruption, at 1.0 sec this time. TCI failed, probably lost nl4 feedback very early. Gas valve is full open from .16sec on. Move on to the "zero gap" case. |
| Sep 25 2000 01:55:31:733PM | 1000925015 | Steve Wolfe | shot#15: Move on to the "zero gap" case. rcur from .6505 to .664, hold CLEARIN at 0.003 through rampdown fizzle. fields don't look bad, gas is ok, looks like it doesn't burn through. next shot: repeat |
| Sep 25 2000 02:19:40:840PM | 1000925016 | Steve Wolfe | shot#16: Move on to the "zero gap" case. rcur from .6505 to .664, hold CLEARIN at 0.003 through rampdown plasma, to 1.4sec. Gap shows .6cm, according to EFIT. next shot: add 3mm to RCUR |
| Sep 25 2000 02:28:45:640PM | 1000925017 | Steve Wolfe | shot#17: add 3mm to RCUR to .667 plasma to 1.4sec. this time got the right gap at 0. next shot: drop density to .97e20 |
| Sep 25 2000 02:54:43:810PM | 1000925018 | Steve Wolfe | shot#18:: drop density to .97e20 plasma to 1.59sec, nl4=1.0-1.1e20 H/D ~.3 to .4 next shot: .6e20 |
| Sep 25 2000 03:11:30:590PM | 1000925019 | Steve Wolfe | shot#19: drop density to .6e20 plasma, full length. nl4 rising from .7 to .9 next shot: drop demand to 0.5e20 |
| Sep 25 2000 03:29:53:090PM | 1000925020 | Steve Wolfe | shot#20: drop demand to 0.5e20. Brian will puff from FSP this shot. plasma, full length. nl4=6 - 8e19. next shot: go to 12mm outer gap. |
| Sep 25 2000 03:52:38:750PM | 1000925021 | Steve Wolfe | shot#21: go for 12mm outer gap. rcur from .667 to .660 plasma, full length. nl4=0.6e20, gap=12-13mm. next shot: nl4=9.7e19 |
| Sep 25 2000 04:24:15:640PM | 1000925022 | Steve Wolfe | shot#22: nl4=9.7e19, move rxl out by 4mm plasma, 1.56 sec, nl=1e20, 12mm gap. next shot, nl4=1.5e20 |
| Sep 25 2000 04:36:23:090PM | 1000925023 | Steve Wolfe | shot#23: nl4=1.5e20, increase pg3 pre-prog, keep rcur in a little at crossover. plasma to 1.4sec, bad thrashes at .32 and .45 sec nl4 is ramping continuously through the shot, reaches 1.5 at 0.9 next shot: nl4=1.0, inner gap to "0" |
| Sep 25 2000 05:00:59:107PM | 1000925024 | Steve Wolfe | shot#24: nl4=1.0, inner gap to "0", so clearin from .003 -> -.017, rcur from .660->.650 plasma, 1.64sec, nl4-=1.1e20, outer gap 18-20mm instead of 12. next shot: try for outer gapback at 12mm |
| Sep 25 2000 05:18:43:437PM | 1000925025 | Steve Wolfe | shot#25: try for outer gap back at 12mm; rcur to .654 from .650 plasma, full length, looked good. next shot: Go back to shot 18, and move 4mm further out. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:27:23:920AM | Test | Ok | TF Test only, Looks Good |
| 2 | 09:40:49:983AM | Plasma | Ok | |
| 3 | 10:08:04:140AM | Plasma | Ok | |
| 4 | 10:28:57:590AM | Plasma | Ok | |
| 5 | 10:50:18:217AM | Plasma | Ok | |
| 6 | 11:06:14:810AM | Plasma | Ok | |
| 7 | 11:24:28:623AM | Plasma | Ok | |
| 8 | 11:40:33:780AM | Plasma | Ok | |
| 9 | 11:56:54:060AM | Plasma | Ok | |
| 10 | 12:13:54:233PM | Plasma | Ok | |
| 11 | 12:33:51:857PM | Plasma | Ok | |
| 12 | 12:53:29:700PM | Plasma | Bad | OH-2 commutation switches did not fire. |
| 13 | 01:12:23:500PM | Plasma | Ok | |
| 14 | 01:29:42:060PM | Plasma | Ok | |
| 15 | 01:49:36:090PM | Plasma | Ok | |
| 16 | 02:02:48:060PM | Plasma | Ok | |
| 17 | 02:23:23:000PM | Plasma | Ok | |
| 18 | 02:45:36:153PM | Plasma | Ok | |
| 19 | 03:04:39:607PM | Plasma | Ok | |
| 20 | 03:25:30:750PM | Plasma | Ok | |
| 21 | 03:46:29:890PM | Plasma | Ok | |
| 22 | 04:17:06:560PM | Plasma | Ok | |
| 23 | 04:31:03:607PM | Plasma | Ok | |
| 24 | 04:54:54:577PM | Plasma | Ok | |
| 25 | 05:15:58:233PM | Plasma | Ok | |
| 26 | 05:37:55:733PM | Plasma | Ok | |