| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch,Bruce Lipschultz |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Gary Dekow,Bill Cochran |
| Engineering Operator Run Comment |
| MP#225, #214, SL:Lipschultz, PO: Wolfe, RF: Wukitch, EO: Dekow, Cochran |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:21:490PM |
| Author: To Be Determined |
| MP#225 Impurity Sources MP#214 RF conditioning SL: Lipschultz PO: wolfe RF guru: Wukitch Goals: (1) Identify the impurities generated by each antenna, the scaling with power and if there is any decrease in impurity sources over time as the antennas are used (conditioned). Ideally this is done for both L- and H-mode. (2) Determine the screening of impurities generated at the inner wall, antennas and the divertor. Understand how the core impurity transport affects this (shit shooter). Understand the relationship to edge potentials or sheath rectification. (3) Evaluate the heating efficiency of the different antennas as well as the various phasing scenarios for J antenna. One judgement is what is the power threshold for H-mode for the different antennas. Summary: - We achieved most of our goals today. The missing piece was the scaling of impurity levels and sources in H-mode. The plan had been to make an EDA H-mode with E or D and then add steps of power on top of that to examine the scaling of impurity sources w/p[ower. - We had difficulty getting EDA H-mode today. - J puts in Ti, but not Fe impurities into the plasma, increasing with RF power. - The Ti injections from J typically occurred at a step increase in power. - D and E do not generate Ti. But sometimes Fe is generated. Mo always. - TThe power threshold for H-mode is ~ 1 MW for D or E antennas. - J does not allow us to get into H-mode even at the level of 2 MW total. - The inner gap did seem to affect getting into H-mode. - The inner gap did not seem to affect radiation levels. - Mo levels and their dependence on antenna and power requires further analysis. shots 3-4: finished yesterday's phase comparison for J3/J4 to D/E where in the same shot first the pair J3/J4 is pulsed (stepping ip in power to 1.5 MW), and then D/E are pulsed. The heating and impurity generation were compared. J3/J4 did seem to put in more impurities. JT specifically mentioned Ti only during J3/J4. Also the ECE appears to show hotter edge for D/E. Shots 5-13: L-mode comparison: On each shot only one antenna is stepped up in power to 1.0 MW and the impurity levels and heating compared. The radiated power during D/E is very low. Not true for J3 or J4. Numerous injections raising radiated power to 2.5 MW or so. Injections at least include Ti. There appears to be a higher Mo background as well. Use of J3 & J4 together lowers impurity injection at the same level of overall power. But injections are still there for only 0.5 MW each antenna. Jim Terry indicated aome amount of Iron coming in from the D-antenna. Shots 14-17: H-mode threshold. J3 & J4 together never achieved H-mode, even at powers approaching 2 MW. Both D & E power got the plasma into H-mode at threshold powers around 1-1.1 MW. However, all H-mode plasmas were ELM-free. Shots 18-21: Tried to get EDA H-mode with just D/E combination so that we could then add J. Never really achieved this in a steady state manner. Shots 20-21 had some amount of EDA but there were problems with keeping E on. Shots 22-25: Try the gap scan to see how the inner wall source varies with gap during RF. It appeared that we got into H-mode more easily with larger inner gap. Shots 22-23 had H-mode as the gap got larger (inner and outer for shot 22). When we kept the RF power low enough (800 kW for shot 24) the plasma stayed in L-mode and the radiation stayed constant, no effect of the gap! Similar result for the case of shot 25 where we 'stayed' in H-mode. Details: shot 3: got a shot 800 kA, stairstep on J3/j4 up to 1.5 MW followed by D/E up to the same power. Phasing of J3/J4 is 0, pi, pi, 0. ASP probe scanned but not deeply. FSP has a problem. AB limiter probes are set up to look at floating potential (probes 0) and Isat (probes 1). Floating potential shows changes during the RF - A side probes affected more by J3/J4 and vice versa for B-side limiter probes for D/E. JT sees an impurity line come up during J3/J4 and not during D/E. He thinks it is Ti. shot 4: repeat of shot 3, but with better control of RF. Only thing to add is that at equivalent powers and confinement mode (L-mode), that J3/J4 leads to more radiation (850 kW to 750 kW). Amanda indicated that the central Tes are the same bu the edge Te is higher fo shot 5: Only D-port. Steps of power at 0.45, .88, 1.3 MW. Unfortunately it went into H-mode during the last power step. We need to repeat and lower steps so the max is 1.0 MW. Very little Mo onthis shot. Radiated power low as well. Strike point (outer div) was shifted down this shot to more like probe 2 or so. shot 6: Only D-port again. Steps of power at 0.55, .82, 1.1 MW. Stayed in L-mode. Very low radiated power. shot 7: E port only. Steps of power at 0.5, .75, 1.0 MW. Stayed in L-mode. Very low radiated power as well. - max, .75 MW. shot 8: J3 did not go - ohmic shot 9: J3 went for the most part. 0.5, .8, 1.05 MW. The last step was not really there. Radiated power was up to 1.25 MW even during the second J3 power step. Up to 3 MW during the last power step which is when there is a large Mo injection. Could have been a plasma problem. shot 10: J4 wstepped up. 0.5, .7, 0.9 MW. Radiated power ranged from 1.2 to 2.8 mW as there were numerous injections. ECE reports that the edge is cooling. shot 11: scanner test' shot 12: redo J3 to see if equilibrium is affecting things (it was returnd to shot 8 setup). Still getting injections and high radiated power. Mo appears to be higher with J3/J4 and the injections appear to be due to Ti (Jim Terry). shot 13: J3 & J4 together same steps in total power. Still one large injection (Ti again) but in general the radiated power is lower than with J3 or J4 alone. shot 14: J3 & J4 together, ramping from 1 -2 MW. J3 gives up at 0.75 MW (1.5 MW overall). Still big injections, no H-mode. shot 15: J3 & J4 together again, ramping from 1 -2 MW. Got to 1.7 MW this time before J3 gives up. Radiated power at that time ~ 3-4 MW. The divertor starts cooling at 1.0 sec, looks detached! shot 16: E antenna ramping from 1 -2 MW. Transition to H-mode at a little over 1 MW (1.1). Unfortunately we get ELM-free. 1.1 MW of radiated power. shot 17: D antenna ramping from 1 -1.5 MW. Transition to H-mode at a little over 1 MW (1.03). Unfortunately we get ELM-free. 1.3 MW of radiated power. shot 18: D & E antennas together ramping from 1.4 - 2.8 MW. Only get to 2 MW before impurity accumulation in ELM-free kills the discharge. shot 19: D & E antennas together up to 1.5 MW. Mixture of EDA and ELM-free shot 20: D & E antennas together tried for 3 MW. E drops out but we get some fraction of the shot in EDA. 1.5 MW of RF, similar radiated power. shot 21: D & E antennas together tried for 3 MW. Still problems getting E to stay on. shot 22: Inner gap scan with just E port at 0.9 MW. Unfortunately, the outer gap changed as well. The plasma went into H-mode at this low power. We don't know if it was the inner or outer gap or both that caused this. shot 23: Inner gap scan with just E port at 1.2 MW. Outer gap still varying. But it goes into H-mode when the inner gap is 2 cm and the outer gap 3 mm. The last shot had a large inner gap and a large inner gap when it went into H-mode. The implication is that the inner gap is important (large is good) in getting into H-mode. shot 24: Inner gap varied with E RF power of 800 kW. Stayed in L-mode and the radiated power did not really change. So at first glance the gap did not affect the impurities. shot 25: Inner gap varied with E RF power of 2.3 MW. Got H-modes, but not EDA so back and forth between L-mode and EML-free. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:09:740PM |
| Author: To Be Determined |
| Physop Summary for Thurs. 991021 MP#225 Impurity Sources MP#214 ICRF Conditioning SL: Blip PO: wolfe EO: Dekow,Cochran Plan: ----- Engineering Setup for 991021: Setup power supplies from shot 991020013 this shot has a long TF waveform for resistance measurements Fizzle detector from .08 to 1.7sec Two hours of ECDC in D2 prior to the run. Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 10 psi of H2 Hybrid enabled fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED **** leave divertor capillary system as is (with 2psi of helium-4 plus 2psi of helium) **** The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV If possible, the EF1L voltage problem, which results in distorted pre-charge waveforms, should be fixed. Also, the EF3 supply voltage instrumentation problem should be fixed. However, these activities should not be allowed to delay the run, since we seem to be able to live with them. ------------------------------------------------------------------------------- Goals: (1) Identify the impurities generated by each antenna, the scaling with power and if there is any decrease in impurity sources over time as the antennas are used (conditioned). Ideally this is done for both L- and H-mode. (2) Determine the screening of impurities generated at the inner wall, antennas and the divertor. Understand how the core impurity transport affects this (shit shooter). Understand the relationship to edge potentials or sheath rectification. (3) Evaluate the heating efficiency of the different antennas as well as the various phasing scenarios for J antenna. One judgement is what is the power threshold for H-mode for the different antennas. I have assumed that a phase/heating study of J3 and/or J4 separately and together has been done and that this is set and ready to go. Method: Start with a shot similar to 991020013 (800kA, 1.0e20). (A) L-mode: For (1) Step an antenna up in power during a given shot - 400, 650, 900 kWatts for periods or 300 msec or so (Stay in L-mode). This might take 2 shots or more per antenna - 6-8 shots. We recommend that J3 and J4 be treated separately so that the power at the straps and electric fields are similar to D or E. (B) Use D or E at ~ 1.2 MW to get into EDA H-mode. Then pulse the remaining antennas up to 1.5 MW to compare impurity levels during H-mode (~ 6 shots). (C) The sources and core impurity transport (shit-shooter) will be measured during A-B to accomplish goal 2. In addition we would like to vary the inner wall gap with one antenna to see if this has any effect on the inner wall source and core levels. - 3-4 additional shots. (D) H-mode heating efficiency (goal 3). Ramp the power though the H-mode threshold to determine differences in threshold, if any, for the 4 antennas. (~ 6 shots) . Diagnostics: McPherson and Chromex spectrometers, ICRF up to 1.4 MW each antenna, laser-blowoff (for core impurity transport). FSP and ASP probes if possible to look at floating potential in the SOL. ------------------------------------------------------------------------ Results: -------- We started by taking a couple of shots with J-port (3&4) with 0,pi,pi,0 and 0,pi,0,pi to complete yesterdays experiments. Parts A, B, and C were done, mostly. We also did some ramps, but didn't get good comparisons for J-port as far as threshold is concerned. J-port ran, but seemed to be a serious impurity source above 1MW. D seemed to be a gas source, at least early in the day. The highest power from D+E was 3MW, but E faulted after about 50msec. H-modes were obtained on many shots, including some intended to be L-mode. However, confinement was pretty poor, impurity increases were the rule, and only rather poor EDAs were obtained. Startup was reliable all day, although Br wandered around a bit, and the pre-puff pressure was lower than expected (.055-.06mTorr for a 26msec puff). There were several minor equilibrium tweaks today. RXL and ZXL were adjusted to try to keep the outer strike on the lower part of the plate. STRKPSI was used for a few shots, unfortunately coinciding with use of the J-port antenna, and lots of injections and disruptions. We turned STRKPSI back off to demonstrate that the problem was with the antenna rather than the control, but never went back to it. The CLEARIN control seemed to be very non-linear, requiring a larger change than expected to get the 3cm inner gap for part C of the plan. I ended up programming +.012 for the final step, while a 1.5cm gap was achieved with a demand of -.01. The H2-puff was as yesterday for shots 3-16, decreased for 17, turned off on shots 18-22, and back on at lower level (as on 17) for #23-25. The EF1L voltage deficit, which results in a distorted current waveform in pre-charge, persisted until shot 19, when it magically fixed itself. The max voltage output went from 200V to 230V. The EF3 instrumentation problem was traced to a bad crate power supply. Because this crate is hard to access, the repair will wait until Monday. Details: ------------ Shot 1 was a scanner test, which was inadvertantly run with IGOR bypassed, resulting in lots of un-initialized CAMAC. On the following shot, three power suppies failed to fire; the effect seems to be related to the well-known problem of backing out of a shot between INIT and PULSE. Shot 3-4 were similar to yesterday's shots, with J-port followed by D+E. The J-port phase was changed from 0,pi,pi,0 to 0,pi,0,pi. D+E gave H-modes, J didn't. Shots 5-10,12 were one transmitter at a time, with stepped power. Shots 9-10 had STRKPSI turned on. Shot 11 was a scanner test (no power). Shots 13-15 had both J transmitters on together. This was a modification to part B, in that we started with J instead of D&E. Shots 16-21 were D,E, or combinations thereof. Some tweaks of gas puffing. Shots 22-25 were attempts to get a stairstep inner gap scan. #22 ended up with a varying outer gap (down to zero) as well because I forgot to change the RCUR as well as CLEARIN. Thebest scan was #25, which got to 3cm inner gap with approximately fixed outer gap. This was tricky because the CLEARIN didn't seem to be responding fully to the program changes. Scorecard ---------- Tests 2 Duds 1 (power supplies) Fizzles 0 Plasmas 22 ------------ Shots 25 |
| Session Leader Comments | |||
| Oct 21 1999 09:57:25:717AM | 991021003 | Bruce Lipschultz | shot 3: got a shot 800 kA, stairstep on J3/j4 up to 1.5 MW followed by D/E up to the same power. Phasing of J3/J4 is 0, pi, pi, 0. ASP probe scanned but not deeply. FSP has a problem. AB limiter probes are set up to look at floating potential (probes 0) and Isat (probes 1). Floating potential shows changes during the RF - A side probes affected more by J3/J4 and vice versa for B-side limiter probes for D/E. JT sees an impurity line come up during J3/J4 and not during D/E. He thinks it is Ti. |
| Oct 21 1999 10:14:05:420AM | 991021004 | Bruce Lipschultz | shot 4: repeat of shot 3, but with better control of RF. Only thing to add is that at equivalent powers and confinement mode (L-mode), that J3/J4 leads to more radiation (850 kW to 750 kW). Amanda indicated that the central Tes are the same bu the edge Te is higher for D/E. |
| Oct 21 1999 10:36:02:827AM | 991021005 | Bruce Lipschultz | shot 5: Only D-port. Steps of power at 0.45, .88, 1.3 MW. Unfortnately it went into H-mode during the last power step. We need to repeat and lower steps so the max is 1.0 MW. Very little Mo onthis shot. Radiated power low as well. Strike point (outer div) was shifted down this shot to more like probe 2 or so. |
| Oct 21 1999 10:54:21:280AM | 991021006 | Bruce Lipschultz | shot 6: Only D-port again. Steps of power at 0.55, .82, 1.1 MW. Stayed in L-mode. Very low radiated power. |
| Oct 21 1999 11:16:15:640AM | 991021007 | Bruce Lipschultz | shot 7: E port only. Steps of power at 0.5, .75, 1.0 MW. Stayed in L-mode. Very low radiated power as well. - max, .75 MW. |
| Oct 21 1999 11:40:17:763AM | 991021008 | Bruce Lipschultz | shot 8: J3 did not go - ohmic. |
| Oct 21 1999 12:18:26:200PM | 991021010 | Bruce Lipschultz | shot 10: J4 wstepped up. 0.5, .7, 0.9 MW. Radiated power ranged from 1.2 to 2.8 mW as there were numerous injections. ECE reports that the edge is cooling. |
| Oct 21 1999 01:04:54:280PM | 991021012 | Bruce Lipschultz | shot 12: redo J3 to see if equilibrium is affecting things (it was returnd to shot 8 setup). Still getting injections and high radiated power. Mo appears to be higher with J3/J4 and the injections appear to be due to Ti (Jim Terry). |
| Oct 21 1999 01:12:29:170PM | 991021013 | Bruce Lipschultz | shot 13: J3 & J4 together same steps in total power. Still one large injection (Ti again) but in general the radiated power is lower than with J3 or J4 alone. |
| Oct 21 1999 01:27:17:513PM | 991021014 | Bruce Lipschultz | shot 14: J3 & J4 together, ramping from 1 -2 MW. J3 gives up at 0.75 MW (1.5 MW overall). Still big injections, no H-mode. |
| Oct 21 1999 01:49:35:280PM | 991021015 | Bruce Lipschultz | shot 15: J3 & J4 together, ramping from 1 -2 MW. Got to 1.7 MW this time before J3 gives up. Radiated power at that time ~ 3-4 MW. |
| Oct 21 1999 02:19:44:233PM | 991021016 | Bruce Lipschultz | shot 16: E antenna ramping from 1 -2 MW. Transition to H-mode at a little over 1 MW (1.1). Unfortunately we get ELM-free. 1.1 MW of radiated power. |
| Oct 21 1999 03:00:20:373PM | 991021018 | Bruce Lipschultz | shot 18: D & E antennas together ramping from 1.4 - 2.8 MW. Only get to 2 MW before impurity accumulation in ELM-free kills the discharge. |
| Oct 21 1999 03:13:08:810PM | 991021019 | Bruce Lipschultz | shot 19: D & E antennas together up to 1.5 MW. Mixture of EDA and ELM-free. |
| Oct 21 1999 03:32:03:683PM | 991021020 | Bruce Lipschultz | shot 20: D & E antennas together tried for 3 MW. E drops out but we get some fraction of the shot in EDA. 1.5 MW of RF, similar radiated power. |
| Oct 21 1999 03:49:54:247PM | 991021021 | Bruce Lipschultz | shot 21: D & E antennas together tried for 3 MW. Still problems getting E to stay on. |
| Oct 21 1999 04:09:24:013PM | 991021022 | Bruce Lipschultz | shot 22: Inner gap scan with just E port at 0.9 MW. Unfortunately, the outer gap changed as well. The plasma went into H-mode at this low power. We don't know if it was the inner or outer gap or both that caused this. |
| Oct 21 1999 04:32:25:857PM | 991021023 | Bruce Lipschultz | shot 23: Inner gap scan with just E port at 1.2 MW. Outer gap still varying. But it goes into H-mode when the inner gap is 2 cm and the outer gap 3 mm. The last shot had a large inner gap and a large inner gap when it went into H-mode. The implication is that the inner gap is important (large is good) in getting into H-mode. |
| Oct 21 1999 04:52:04:483PM | 991021024 | Bruce Lipschultz | shot 24: Inner gap varied with E RF power of 800 kW. Stayed in L-mode and the radiated power did not really change. So at first glance the gap did not affect the impurities. |
| Oct 21 1999 05:07:45:263PM | 991021025 | Bruce Lipschultz | shot 25: Inner gap varied with E RF power of 2.3 MW. Got H-modes, but not EDA so back and forth between L-mode and EML-free. |
| Physics Operator Comments | |||
| Oct 21 1999 10:31:30:483AM | Steve Wolfe | Run plan for 991021: MP#225 Impurity Sources MP#214 RF conditioning SL: Lipschultz PO: wolfe RF guru: Wukitch Engineering Setup for 991021: Run will begin at 9:00 Setup power supplies from shot 991020013 this shot has a long TF waveform for resistance measurements Two hours of ECDC in D2 prior to the run. Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 10 psi of H2 Hybrid enabled fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED **** leave divertor capillary system as is (with 2psi of helium-4 plus 2psi of helium) **** The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV If possible, the EF1L voltage problem, which results in distorted pre-charge waveforms, should be fixed. Also, the EF3 supply voltage instrumentation problem should be fixed. However, these activities should not be allowed to delay the run, since we seem to be able to live with them. ------------------------------------------------------------------------------- Goals: (1) Identify the impurities generated by each antenna, the scaling with power and if there is any decrease in impurity sources over time as the antennas are used (conditioned). Ideally this is done for both L- and H-mode. (2) Determine the screening of impurities generated at the inner wall, antennas and the divertor. Understand how the core impurity transport affects this (shit shooter). Understand the relationship to edge potentials or sheath rectification. (3) Evaluate the heating efficiency of the different antennas as well as the various phasing scenarios for J antenna. One judgement is what is the power threshold for H-mode for the different antennas. I have assumed that a phase/heating study of J3 and/or J4 separately and together has been done and that this is set and ready to go. Method: Start with a shot similar to 991020013 (800kA, 1.0e20). (A) L-mode: For (1) Step an antenna up in power during a given shot - 400, 650, 900 kWatts for periods or 300 msec or so (Stay in L-mode). This might take 2 shots or more per antenna - 6-8 shots. We recommend that J3 and J4 be treated separately so that the power at the straps and electric fields are similar to D or E. (B) Use D or E at ~ 1.2 MW to get into EDA H-mode. Then pulse the remaining antennas up to 1.5 MW to compare impurity levels during H-mode (~ 6 shots). (C) The sources and core impurity transport (shit-shooter) will be measured during A-B to accomplish goal 2. In addition we would like to vary the inner wall gap with one antenna to see if this has any effect on the inner wall source and core levels. - 3-4 additional shots. (D) H-mode heating efficiency (goal 3). Ramp the power though the H-mode threshold to determine differences in threshold, if any, for the 4 antennas. (~ 6 shots) . Diagnostics: McPherson and Chromex spectrometers, ICRF up to 1.4 MW each antenna, laser-blowoff (for core impurity transport). FSP and ASP probes if possible to look at floating potential in the SOL. | |
| Oct 21 1999 10:31:50:200AM | Steve Wolfe | Fizzle detector off time set to 1.7 sec. This should eliminate fd on normal long shots, so second tf plateau will go as programmed. | |
| Oct 21 1999 10:32:01:873AM | Steve Wolfe | Setting up PCS: Load from 991020014 I want to try recalculating the filament predictors (used for ZCUR) without f29, which is still bouncing around. This may help the lurch in ZCUR and BR_0 at 3msec. FIrst I'll try a test: for the first shot I'll turn off \HYBRID::HYB_INPUT_NAME_29 which is F29, and turn on \HYBRID::HYB_INPUT_NAME_12, which is F16, in the HYBRID model file. Recalculate seg2:wire10, the unused zcur wire. Do a load/clean. Note that I haven't updated the CONFIG_ID yet. Never mind. The ZCUR2 control doesn't come on until 33msec, and ZCUR3 is on the chopper, which doesn't come on until 50msec. Recalculate the wire 10 predictors with input 12 off and input 29 on again. Whoa! The values are different? Not by much, it's like 2% higher on f29. Start over, reload 991020014 and leave the tree as it was. The difference is probably to do with new BPcoils or something, but I'll track it down another time. Load 991020014 into model. | |
| Oct 21 1999 10:32:24:530AM | Steve Wolfe | Do a coldstart: 21-OCT-1999 08:22:31.34 SPANNA$ @HYBINIT_DISPATCH.COM;2 Logfile looks ok (no errors, all matrices respond) | |
| Oct 21 1999 08:50:46:530AM | 991021001 | Steve Wolfe | shot#1: Supposed to be a scanner test. However, IGOR was bypassed, and the shot number on the bigboard didn't update. It is storing with storing with shot#991021001, but with lots of errors from things that didn't INIT before we went into pulse. Some traces are storing the old data from 991020014 as 9910201001. |
| Oct 21 1999 09:32:57:797AM | 991021002 | Steve Wolfe | shot#2: THis should be a continuation of yesterday's phase sequence, similar to 991020014. EF3 camac module has been replaced by a tr16, but tree is not yet updated. dud. No oH1, no ef1's. POssibly the same effect as backing out shows up because of the IGOR disconnect on shot#1? TR16 signals from ef3 are all saturated. Next shot: try again |
| Oct 21 1999 09:42:06:530AM | 991021003 | Steve Wolfe | shot#3: THis should be a continuation of yesterday's phase sequence, similar to 991020014. plasma, h-mode. Got a good tf plateau from 2.8 to 3.6sec bd at 6msec, nice current rise. Pressure only at .055; puff is 26msec. The btop valve may be getting sticky. All RF's fired, both j's look hashy. H-mode with D/E at 1.35sec, 1MW. |
| Oct 21 1999 10:05:31:780AM | 991021004 | Steve Wolfe | shot#4: No PCS changes. RF will change J-port phase. Shitshooter will fire at .5sec. plasma. one h-mode. RF is happy with phase comparison. next shot, lower ZXL by 1cm, move RXL in by ~.005 to lower strikepoint. |
| Oct 21 1999 10:28:14:700AM | 991021005 | Steve Wolfe | shot#5: Now starting BLIP's part of the run, item A. Moved ZXL, RXL to lower strikepoint. plasma, one H-mode (Blip wanted L-mode). strike point is now at -.53m, but it starts up at 1.4sec; looks like it jumps at H-L transition. The only thing I change at 1.4 is a knot in EF2by EF4. Next shot, move that to 1.5sec. |
| Oct 21 1999 10:56:31:873AM | 991021006 | Steve Wolfe | shot#6: Move knot on EF2byEF4 from 1.4 to 1.5sec, leave ZXL, RXL alone for this shot. May want to go back up a little once we see how it does in L-mode. plasma, L-mode. stikepoint is now climbing; probably due to higher voltage, more flux swing from OH stack. Next shot: no changes |
| Oct 21 1999 11:16:48:153AM | 991021007 | Steve Wolfe | shot#7: No real PCS changes; change strkpsi program to 0. from -.005, no gain. plasma, l-mode; E-port. strkpoint is too low early, too high late. BR is creeping up, now at +.0005; leave it for now. |
| Oct 21 1999 11:40:24:310AM | 991021008 | Steve Wolfe | shot#8: ZXL changes: (.564, -.01 from -.015),(1.478,-.026 from -.024) Blip doesn't want me to turn on STRKSPI. plasma, l-mode. j3 didn't go. Strike is better, but still moving Next shot, turn on strkpsi |
| Oct 21 1999 12:00:14:093PM | 991021009 | Steve Wolfe | shot#9: STRKPSI p-gain (.5,4),(1.6,0), RSOUT=.624,ZSOUT=-.54, val=0.0 OOPs, it uses F29, recalculate it. ZXL gain (.5,2),(1.6,8) The RXL and ZXL seem to be using F29! This could be part of the problem. Where did this shot come from? I thought all of those were changed. plasma disrupted at 1.6, when I turned the ZXL back on hard? Seems to get in vertical trouble after 1sec There is an injection or flake at 1.33 |
| Oct 21 1999 12:01:33:093PM | 991021009 | Steve Wolfe | shot#9: STRKPSI p-gain (.5,4),(1.6,0), RSOUT=.624,ZSOUT=-.54, val=0.0 OOPs, it uses F29, recalculate it. ZXL gain (.5,2),(1.6,8) The RXL and ZXL seem to be using F29! This could be part of the problem. Where did this shot come from? I thought all of those were changed. plasma disrupted at 1.6, when I turned the ZXL back on hard? Seems to get in vertical trouble after 1sec There is an injection or flake at 1.33 |
| Oct 21 1999 12:09:31:140PM | 991021010 | Steve Wolfe | shot#10: STRKPSI p-gain (.5,6),(1.6,0), RSOUT=.624,ZSOUT=-.54, val=0.0 ZXL gain (.5,2),(1.6,6) Try it again, I think the injections from J3 were responsible for the disruption, but maybe not. If this one also disrupts I'll back off. Aother disruption at 1.4sec this time. I think I'd better go back to RXL,ZXL. |
| Oct 21 1999 12:30:47:983PM | 991021011 | Steve Wolfe | shot#11: Reload from shot 8. Problem with the scanner, this will be a no-power test. |
| Oct 21 1999 12:48:18:530PM | 991021012 | Steve Wolfe | shot#12: Reloaded from shot 8. plasma, disrupts at 1.13! Injection raising nl at 1.06. I think it's them. Next shot, try J3 and J4 together. |
| Oct 21 1999 01:07:50:483PM | 991021013 | Steve Wolfe | shot#13: No pcs changes, try J3 and J4 together 0,pi,0,pi plasma, nearly full length 1.69sec injection at 1.2 doesn't kill it, but does take a bite out of Ip. |
| Oct 21 1999 01:25:41:373PM | 991021014 | Steve Wolfe | shot#14: No pcs changes, ramp power from J-port. Disable Ar (b-side lower) Now on step B of Blip's run plan (more or less) plasma, no h-mode, injections. Next shot: ramp ZXL up faster after 1.5sec to decrease vertical inst. |
| Oct 21 1999 01:40:37:047PM | 991021015 | Steve Wolfe | shot#15:ramp ZXL up faster after 1.5sec to decrease vertical inst. plasma disrupts at 1.5sec, multiple injections. Next shot: e-port |
| Oct 21 1999 02:03:00:390PM | 991021016 | Steve Wolfe | shot#16: increase outer gap by 2mm (1mm decrease on RCUR); it was getting small NOte that all the seg2 fluxihh algs in this shot are still using f29. This could lead to mm changes. e-port ramp. plasma, hmodes. dithers or type 3's Next shot: d-port ramp. |
| Oct 21 1999 02:27:04:577PM | 991021017 | Steve Wolfe | shot#17: decrease H puff: eliminate maintenance level, shorted main puff from 250msec to 150msec, d-port ramp plasma, h-modes. Still no EDA. H/D hardly changed. Next shot, turn it off. D&E ramping together. |
| Oct 21 1999 02:42:08:997PM | 991021018 | Steve Wolfe | shot#18: turn off H2 puff (b-side upper). D&E ramping together. plasma, h-mode, disrupts at 1.1sec. lots of injections, big injection at 1.06. h-mode at .62sec, trying to be eda |
| Oct 21 1999 03:03:13:483PM | 991021019 | Steve Wolfe | shot#19: Increase seg 1 pg3 gas puff to slow down current rise, help with injection at 0.11sec. plasma, h-modes, several injections, full length. current rise is better, no divot. |
| Oct 21 1999 03:07:25:483PM | 991021019 | Steve Wolfe | shot#19: Increase seg 1 pg3 gas puff to slow down current rise, help with injection at 0.11sec. plasma, h-modes, several injections, full length. current rise is better, no divot. H/D ~.05 |
| Oct 21 1999 05:06:25:700PM | 991021019 | Steve Wolfe | Bill points out that EF1L fixed itself on shot 19. Voltage goes up to 230V, and current waveform looks normal. No obvious reason; there was a disruption on 18. |
| Oct 21 1999 03:24:53:403PM | 991021020 | Steve Wolfe | shot#20: no pcs changes. try raising the power. plasma, h-modes. Up to 3MW briefly. E-port trips out at 0.68sec. Next shot: turn Ar back on |
| Oct 21 1999 03:40:55:797PM | 991021021 | Steve Wolfe | shot#21: turn Ar back on. Back off on E-port. plasma, h-modes, e-port unhappy. Next shot: Stairstep inner gap scan, aiming for .5,1.5,2.5 cm. |
| Oct 21 1999 04:03:08:310PM | 991021022 | Steve Wolfe | shot#22: Stairstep inner gap scan, aiming for .5,1.5,2.5 cm. also Raise ZXL by 0.005. E-port only at 0.9MW plasma, full length, got an h-mode at 1.17sec. OOPS, I forgot to change the RCUR, just changed CLEARIN! Next shot, try to do it right. |
| Oct 21 1999 04:26:05:560PM | 991021023 | Steve Wolfe | shot#23: Stairstep inner gap scan, aiming for .5,1.5,2.5 cm. Change RCUR by 5mm at each step, CLEARIN by 1cm, relative to shot 21 E-port only at 1.2MW Re-enable H-puff, as on shot#17 plasma, h-modes, gaps change almost right, last step needs to be bigger. Next shot: try larger CLEARIN on last step |
| Oct 21 1999 04:44:25:437PM | 991021024 | Steve Wolfe | shot#24: try larger CLEARIN by 11mm on last step; move RCUR by only 4, since the outer gap got too small there on 23. reduce power to 750kW. plasma, no h-mode. inner gap gets to 2.6, outer drops to 3mm again. CLEARIN seems to be very non-linear in this range. Next shot: Increase CLEARIN another 4mm, to +.012 ! |
| Oct 21 1999 05:04:15:890PM | 991021025 | Steve Wolfe | shot#25: Increase CLEARIN another 4mm, to +.012, decrease RCUR by 1mm plasma, h-modes, gap scan looks ok, got 3cm inner, outer stays close to 9mm. RF got 2.4MW flat. H-modes are pretty ratty though Lots of hard x-rays early; dump at .13 sec. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:45:45:077AM | Test | Ok | TF Scanner |
| 2 | 09:13:01:140AM | Plasma | Bad | NO OH1, EF1U, EF1L |
| 3 | 09:33:33:827AM | Plasma | Ok | (null) |
| 4 | 09:55:37:653AM | Plasma | Ok | (null) |
| 5 | 10:16:13:327AM | Plasma | Ok | (null) |
| 6 | 10:43:21:217AM | Plasma | Ok | (null) |
| 7 | 11:02:11:937AM | Plasma | Ok | (null) |
| 8 | 11:26:20:827AM | Plasma | Ok | (null) |
| 9 | 11:46:52:827AM | Plasma | Ok | (null) |
| 10 | 12:06:31:467PM | Plasma | Ok | (null) |
| 11 | 12:25:38:467PM | Test | Ok | Scanner Test Only - No Power |
| 12 | 12:41:07:920PM | Plasma | Ok | (null) |
| 13 | 12:58:32:747PM | Plasma | Ok | (null) |
| 14 | 01:17:02:967PM | Plasma | Ok | (null) |
| 15 | 01:36:07:170PM | Plasma | Ok | (null) |
| 16 | 01:55:51:547PM | Plasma | Ok | (null) |
| 17 | 02:15:58:170PM | Plasma | Ok | (null) |
| 18 | 02:35:20:263PM | Plasma | Ok | (null) |
| 19 | 02:55:16:403PM | Plasma | Ok | (null) |
| 20 | 03:14:02:217PM | Plasma | Ok | (null) |
| 21 | 03:36:27:297PM | Plasma | Ok | (null) |
| 22 | 03:53:47:937PM | Plasma | Ok | (null) |
| 23 | 04:14:44:920PM | Plasma | Ok | (null) |
| 24 | 04:33:56:873PM | Plasma | Ok | (null) |
| 25 | 04:52:14:653PM | Plasma | Ok | (null) |