| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Bruce Lipschultz |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Joe Daigle,Vinny Bertolino |
| Engineering Operator Run Comment |
| divertor geometry |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:11:523PM |
| Author: To Be Determined |
| Run of 941213 Physics Operator - Steve Wolfe Session Leader - B. Lipschultz Engineering - V. Bartolino The first part of this MP (#69), creation of an 'open' or flat-plate divertor equilibrium, was achieved. The gaps to inner wall and outer antenna were very good and the strike points were above the divertor noses. We tried to sweep the strike points across the plates to be able to reconstruct a divertor plasma profile. This aspect was somewhat successful but it would be nice to do better in order to reconstruct the divertor plasma profile on the basis of too few probes. On the last shot of the run, 30, we got the best sweeping of RXU. On the basis of the analyzed probe data from probe 8 on the outer divertor it appears that more sweep distance would be usefull. In addition it would be nice if the sweep retraced inward as well. This would better justify the profile obtained from the divertor probes. As expected, the scanning probe was not able to penetrate the SOL very far. Brian did get 2 scans in every shot after (and including) shot 18. We did not start on the second part of the MP; creating the slot divertor equilibrium. In general there was alot of difficulty at the beginning of the run. This appeared to be a combination of slight variations in the response in EF1 and a dirty machine. The latter was caused by the recent inability to close the cryopump gatevalve which precluded any ECDC as well as dumping gases into the machine. We seemed to recover from both of the above problems by shot 17. The problem of fizzles following disruptions continued to dog us in this run. The shot summary/comments follow: shot1: OH test, prepare for run by loading 94120928. SHOT 2: fizzle, some problem with EF1 shot 3: fizzle shot 4: plasma but awful. May have been due to no ECDC shot 5: awful shot 6: lasted longer shot 7: reasonable, lasts till inversion. Almost to the point where we can start the program of the day. Wait at least one more shot. Steve will try and tune up the gaps better for the next shot. shot 8:fizzle shot 9: disrupt up, start with program anyway on next shot. shot 10: fizzle shot 11: elliptical plasma that lasted 400 ms. shot 12: fizzle shot 13: lasted almost to current inversion. The plasma is diverted with the strike points roughly in the right spots. The probe currents on the divertor plates are peaked on probes 8 (outer) and 5 (inner). The outer and inner gaps are miniscule. shot 14: fizzle shot 15: again lasted almost to current inversion. The gaps are slightly better than on shot 13; inner gap of 1. cm, outer gap of .6 cm. We will try to improve these. shot 16: fizzle shot 17: This shot almost made it completely through inversion. The gaps are the same. Peak in Isat is still on probe 8. shot 18: This one also went the full length. Two in a row! Huge moly injection at .84 seconds. Inner gap still hanging around 1 cm but the outer gap is much better! ~ 1.3 cm. shot 19: This also looks pretty good. Steve moved the plasma .5 cm down and increased clearin by 0.5 cm to increase the inner and outer gaps. This was successfull; inner gap = 1.5 dropping to 1.25, outer gap 1.7 cm or so. In addition, there was no injection on this shot. Steve will try to increase the inner gap on the next shot. The x-point will also be moved up and out 0,5 cm each to better position the outer strike point. shot 20: Gaps are looking very good! Left gap is 1.5 cm, right gap is 1.8 cm. The x-point did not move out very much so more work is needed there. shot 21: same but slightly higher density shot 22: same but slightly higher density 1.5 e20 line-averaged. shot 23: density still higher, however, the plasma disrupts slightly into inversion. shot 24: fizzle shot 25: fizzle shot 26: ok with density lowered back down slightly. We will try to get more sweep in RXU next shot shot 27: ok again. RXU swept about 1.5 cm over course of shot. We will try to have RXU start 1 cm inward and sweep 3 cm next. shot 28: fizzle shot 29: fizzle shot 30: This shot went. There were 2 moly injections at .32 and .59 seconds. Here we did finally succeed in moving the RXU 3 cm over the shot. This shot is very nice with respect to sweeping past probe 8 on the outer divertor. That probe changes from a location in the common flux region ot the private flux regions over the lenght of the shot. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:52:457PM |
| Author: To Be Determined |
| Physics Operator's Summsary for 941213 MP#069 SL: Lipschultz PO: Wolfe EO: Bertolino/Daigle The plan for today was to develop the top-of-the-divertor strike point configuration and begin development on the slot equilibrium. The top-surface configuration was developed successfully, although some difficulty remained in moving the strike points over a wide range. Nothing was accomplished on the slot configuration. This run was a real struggle, primarily for reasons extraneous to the main focus of the experiment. After the initial OH-only shot, the next two attempts were fizzles. The EF1 supplies appeared to be unbalanced in the opposite direction from last Friday, i.e. EF1L was overshooting the nominal current. Several shots were spent trying to overcome this by increasing the P gains and decreasing the feed-forward voltage on the two supplies symmetrically. It was found that raising the P gain over 5 caused an oscillation on the EF1's so we had to back off from this. Finally a combination that produced reasonable results was obtained. Current rises were produced during this period, beginning with shot 4, but they were dirty and disruptive. This was attributed to the lack of ECDC and the partial dump of the cryo-pump into the machine over the weekend, both results of the GV3 valve being stuck open. Lowering the density allowed the shots to run successfully. We finally began the run proper on shot #10, loading the previously prepared user9:[wolfe.mds.shots.hybrid.pcs]pcs_941210002 and using import seg to get the revised startup from Segment 1 of shot 941213009. It was found that IMPORT SEG would not work to bring segment 2 from the private shot into the live shot, because the code tried to open HYBRID rather than PCS; Josh put up a fix for this after the run. Shot 10 fizzled and 11 was dirty and disruptive. Shot 12 ran ok with the density reduced from 1.1e20 to 0.8e20. Qualitatively, this shot had the correct behavior, but RXU was much more positive than expected and EF2U was on the rail for the entire flattop. Subsequent shots adjusted the programming, primarily of RXU, ZXU but also of CLEARIN and RCUR, to give a satisfactory equilibrium with strikepoints in the nominal locations on top of the divertor modules and good inner and outer gaps. Good examples are #21 - 23. We tried raising the density in 10% increments, until we got in trouble on shot 23, which disrupted hard in the early ramp-down. All disruptions today were followed by one or two fizzles. Shots 22 and 23 had repetitive H-alpha excursions that might have been H-modes, but looked rather funny. The lower density shots did not have such transitions. Shot #26,28 and 30 dropped the density back to 8.6e19 (NL_04) and tried a long ramp in RXL to sweep the strike point across a probe to get a dynamic SOL profile. The last of these got about a 2cm sweep, but did not follow all the way. After the run it was found that there may have been a problem on one of the EF2L supplies for the last few shots; not only were the voltage waveforms for the two supplies different, the current waveforms were different as well. This of course cannot be correct, since the supplies are in series. The engineers will investigate in the morning. The disruptions early in ramp-down on shots 28 and 30 were almost certainly due to operator error; the ZXU was programmed to come down, i.e. toward the plasma, during ramp-down, and ended up going upper-null diverted and then disrupting. The ZXU should have been held constant during rampdown. This error may also have contributed to some of the disruptions on previous shots as well. The startup is still not robust. A large "lurch" appears in Br following commutation. Getting rid of this might help the fizzle problem. Also, the EF1 supplies seem to have a response that drifts durting the day. Blow-by-blow ------------ 941213001 OH only test. Looks ok. 941213002 Load of prepared shot PCS$WOLFE:PCS941210001 Pfill=1.6e-5 fizzle !@#$%^&*() EF1L overshooting. 941213003 Try raising the P gain on each from 2.5 to 5.0 in SEG01 Another fizzle. Now 50A imbalance in EF1s 941213004 Try raising the P gain again on each from 5.0 to 9.0 in SEG01 Short and ugly, but not a fizzle Increased ripple on the EF1's. Too much P gain on the supplies Shot looks dirty. 941213005 Drop the P gain again on each from 9 to 7 in SEG01 Drop voltage feedforward from -72.3 to -62.3 on both Still have ripple on the EF1s. Plasma lasted till 350msec, still dirty and disruptive. 941213006 Drop the P gain on EF1's again on each from 7 to 5 in SEG01 Up to 500kA, still drty and disruptive Small ripple on EF1's, but still there. Imbalance is worse. 941213007 Drop density prog from 1e20 to 7e19 NL04 Drop gas programming from 30msec. (seg1) Drop EF1 voltages from -62.3 to -52.3 Longer, disrupted on ramp-down? Several injections along the way. It goes up on the disruption. 941213008 Change SeG2 offset on RCUR to 10000. Fizzle 941213009 repeat Short again. Big thrash at 350msec? Vertical instability. 941213010 Load my shot 941210002 and do an import segment on seg 01 from 941213009. Fizzle. 941213011 repeat Short dirty disruptive Lasted 400msec, never got up to current. EF2U rails, so does EF2L but not for as long. 941213012 Lower density program to 8e19 from 1.1e20 fizzle. 941213013 Repeat Looks good. Disruption early in ramp-down. EF2U is completely railed for the whole shot. RXU is way further out than the programming. ZXU not too bad. Small inner and outer gaps, barely diverted but strikes are close to nominal. 941213014 Drop RXU from 0.07 to about +0.01 Drop fill to 1.4e-5 to try to avoid fizzle Didn't work, got a fizzle anyway. 941213015 Repeat- It ran, disrupted early in rampdown. EF2U is still railed the whole time. 941213016 Drop RXU from +0.01 to 0. Drop ZXU from .09 to 0.06 fizzle. 941213017 Change RCUR rampin at end to start at 1sec, ramp slower. Lasted longer, till 1.33sec. EF2U rails only between .31 and .55. 941213018 Ramp ZXU up from -.5cm to +.06 at 450msec Move RCUR in by .005 It ran. Brian poked his probe in twice. Dip in current and increase in density around 0.63 (injection) EF2U rails from 340 to 470msec. Gaps look more balanced, but still a bit small. Made it longer into ramp-down to 180kA 941213019 Move ZCUR down from 0.014 to 0.01 Move CLEARIN from -.005 to 0. Seemed to work. Disruption around 200kA. 941213020 MOve RXL out by .005, ZXL up by .005 INcrease CLEARIN Int gain from .05 to 1.0 at .5 sec. INcrease CLEARIN to +.005 Still railing EF2U. 941213021 Back off ZXU another .01 to .05 to get EF2U off the rail. MOve RXL out earlier, and increase P gain from 3 to 5. Raise density by 10% (to 8.8e19 NL04) EF2U now just kisses 4000a. Still not getting RXL under control early 941213022 MOve RXL programming to .018 by 400 msec Raise density another 10% to 9.8e19 Drop ZCUR to 0.005 (down 5mm) OK it came out lower, RXL may be out earlier, still too far in. Got more density. 941213023 Ramp RXL out by an extra cm from .5 to 1.0sec Raise density another 10% to 1.1e20 Disrupted early in ramp down: 1.08 sec, 700kA, 260kA halo current 941213024 Drop ZXU to 0.04 Drop density to 8.6e19, maxing at 0.5 sec Fizzle (surprise, surprise!) 941213025 Repeat-fizzle 941213026 Drop ZXU to 0.04 This one ran to 1.4 sec. EF2U does not rail (or only briefly) This time got part of the RXL ramp. 941213027 Increase ramp on RXL by 0.5cm, add ramp on ZXL by 0.5cm, from 0.5 to 1sec. Disrupted in ramp-down at 1.18 941213028 Start RXL ramp further in .01, swing it out to 0.04 fizzle. 941213029 repeat - another fizzle 941213030 Raise Br0 by 0.5mT Ran but disrupted on ramp-down. Br still has a serious negative lurch. RXL ramp looks ok from 400 to 900, then saturates Scorecard: ---------- Tests 1 Plasmas 18 (13 through flattop) Fizzles 11 Duds 0 -------- -- Total 30 |
| Session Leader Comments | |||
| Dec 13 1994 08:32:43:760AM | Bruce Lipschultz | Run of 941213
Physics Operator - Steve Wolfe Session Leader - B. Lipschultz Engineering - V. Bartolino goal - to develop diverted plasma equilibria that correspond to 'slot' and 'fla geometries. These will be used in the study of the effect of divertor geometry on divertor and main plasma characteristics (M.P. \# 39). Milestone \# 51 (scheduled for completion 1/95) will be satified by completion of this mini-proposal. | |
| Dec 13 1994 08:40:26:880AM | 941213001 | Bruce Lipschultz | shot1: OH test, prepare for run by loading 94120928Run of 941213
The first part of this mp is to create a "flat" plate divertor configuration with the strike points just up above the nose on the divertor modules. This corr. to R=62.2, z=-42.4 on the outer divertor and R=51, z=-38.4 cm on the inner divertor. |
| Dec 13 1994 10:41:31:310AM | 941213009 | Bruce Lipschultz | shot9: still problems with disruptions. However Steve will try to start
the MP program anyway - raising the plasma so that the strike points are above the noses of the divertor noses. |
| Dec 13 1994 11:50:01:180AM | 941213009 | Bruce Lipschultz | shot 13: lasted almost to current inversion. The plasma is diverted with the
strike points roughly in the right spots. The probe currents on the divertor plates are peaked on probes 8 (outer) and 5 (inner). The outer gap and inner gaps are miniscule. |
| Dec 13 1994 11:50:31:620AM | 941213013 | Bruce Lipschultz | shot 13: lasted almost to current inversion. The plasma is diverted with the
strike points roughly in the right spots. The probe currents on the divertor plates are peaked on probes 8 (outer) and 5 (inner). The outer gap and inner gaps are miniscule. |
| Dec 13 1994 12:19:59:430PM | 941213015 | Bruce Lipschultz | shot 15: again lasted almost to current inversion. The gaps are
slightly better than on shot 13; inner gap of 1. cm, outer gap of .6 cm. We will try to improve these. |
| Dec 13 1994 12:34:57:510PM | 941213015 | Bruce Lipschultz | shot 15: again lasted almost to current inversion. The gaps are
slightly better than on shot 13; inner gap of 1. cm, outer gap of .6 cm. We will try to improve these. |
| Dec 13 1994 01:01:32:350PM | 941213017 | Bruce Lipschultz | shot 17: This shot almost made it completely through inversion. The gaps are
the same. Peak in Isat is still on probe 8. |
| Dec 13 1994 01:20:23:580PM | 941213018 | Bruce Lipschultz | shot 18: This one also went the full length. Two in a row! Huge moly injection
at .84 seconds. Inner gap still hanging around 1 cm but the outer gap is much better! ~ 1.3 cm. |
| Dec 13 1994 01:35:47:730PM | 941213019 | Bruce Lipschultz | shot 19: This also looks pretty good. Steve moved the plasma .5 cm down and
increased clearin by 0.5 cm to increase the inner and outer gaps. This was successfull; inner gap = 1.5 dropping to 1.25, outer gap 1.7 cm or so. In addition, there was no injection on this shot. Steve will try to increase t inner gap on the next shot. The x-point will also be moved up and out 0,5 cm e to better position the outer strike point. |
| Dec 13 1994 02:02:56:530PM | 941213020 | Bruce Lipschultz | shot 20: Gaps are looking very good! Left gap is 1.5 cm, right gap is 1.8 cm.
The x-point did not move out very much so more work is needed there. |
| Dec 13 1994 02:50:36:740PM | 941213022 | Bruce Lipschultz | shot 21: same but slightly higher density
shot 22: same but slightly higher density 1.5 e20 line-averaged. |
| Dec 13 1994 03:16:34:390PM | 941213023 | Bruce Lipschultz | shot 23: density still higher, however, the plasma disrupts slightly into
inversion. |
| Dec 13 1994 04:34:38:230PM | 941213026 | Bruce Lipschultz | shot 26: recovered with lower density finally
|
| Dec 13 1994 04:35:07:300PM | 941213027 | Bruce Lipschultz | shot 27: same as 26
|
| Physics Operator Comments | |||
| Dec 13 1994 07:41:21:610AM | Steve Wolfe | MP#069 - Development of New Equilibria for Divertor Geometry Studies
SL: Blip PO: Wolfe EO: Start from user9:[wolfe.mds.shots.hybrid.pcs]PCS_941210001.*, which is basically the same as 941209028 with NL feedback moved to wire 14, and block 9-12 set to IP reference and loaded with shape parameters. This will serve as a checkout shot. If successful we will proceed to development of the top-surface strike-point equilibrium. Reference simulations are in user9:[wolfe.efit.test]*941207902.*. Gas/vac conditions: No ECDC since Friday; GV3 is stuck in open position. Base pressure = 4.2e-8 Torr. Load at 13-Dec-1994 06:59:20.00 HYBINIT at 07:38 First shot will be OH only test (Tuesday ritual) | |
| Dec 13 1994 08:33:12:520AM | 941213001 | Steve Wolfe | Shot #941213001
OH only test. Looks ok. CAMAC store error on Hybrid CADF07 |
| Dec 13 1994 08:56:35:280AM | 941213002 | Steve Wolfe | Shot #941213002
Load of prepared shot PCS$WOLFE:PCS941210001; based on 941209028 with new wire arrangement. Pfill=1.6e-5 (base=4.4e-8) fizzle !@#$%^&*() EF1L is now overshooting. For next shot Try raising the P gain on each from 2.5 to 5.0 |
| Dec 13 1994 09:08:55:010AM | 941213003 | Steve Wolfe | Shot #941213003
EF1L is now overshooting. Try raising the P gain on each from 2.5 to 5.0 in SEG01 Another fizzle. Now 50A imbalance in EF1s Breakdown at 5msec, never forms |
| Dec 13 1994 09:21:57:100AM | 941213004 | Steve Wolfe | Shot #941213004
EF1L is still overshooting by 50 A. Try raising the P gain again on each from 5.0 to 9.0 in SEG01 Short and ugly, but not a fizzle Increased ripple on the EF1's. Too much P gain on the supplies Shot looks dirty. |
| Dec 13 1994 09:36:30:860AM | 941213005 | Steve Wolfe | Shot #941213005
Drop the P gain again on each from 9 to 7 in SEG01 Drop voltage feedforward from -72.3 to -62.3 on both Still have ripple on the EF1s. Need to go back down in P gain, or turn up D. Plasma lasted till 350msec, still dirty and disruptive. |
| Dec 13 1994 09:47:39:750AM | 941213006 | Steve Wolfe | Shot #941213006
Drop the P gain on EF1's again on each from 7 to 5 in SEG01 Up to 500kA, still drty and disruptive Small ripple on EF1's, but still there. Imbalance is worse. |
| Dec 13 1994 10:06:17:190AM | 941213007 | Steve Wolfe | Shot #941213007
Drop density prog from 1e20 to 7e19 NL04 Drop gas programming from 30msec. (seg1) Drop EF1 voltages from -62.3 to -52.3 (I don't want to have to program an imbalance). Longer, disrupted on ramp-down? There is a big hesitation at segment switch; the starting shot has the 10000 discontinuity in RCUR. Several injections along the way. It goes up on the disruption. |
| Dec 13 1994 10:19:49:730AM | 941213008 | Steve Wolfe | Shot #941213008
Change SeG2 offset on RCUR to 10000. Fizzle, probably post-disruption. |
| Dec 13 1994 10:36:44:320AM | 941213009 | Steve Wolfe | Shot #941213009
Change SeG2 offset on RCUR to 10000. repeat Short again. Big thrash at 350msec? Vertical instability. OH2L faulted on the disruption. I think this one may have been trying for too high elongation, because of the change in RCUR. It got to 1.7 |
| Dec 13 1994 10:56:24:300AM | 941213010 | Steve Wolfe | Shot #941213010
Load my shot 941210002 and do an import segment on seg 01 from 941213010. Note: IMPORT SEG would not work from my area. This is starting the actual adjustments from a bad place, but we have to get on with it. Fizzle. Not unexpected, but unpleasant. |
| Dec 13 1994 11:21:18:690AM | 941213011 | Steve Wolfe | Shot #941213011
repeat Short dirty disruptive Lasted 400msec, never got up to current. EF2U rails, so does EF2L but not for as long. It never gets above 500kA. fizzle. |
| Dec 13 1994 11:22:30:120AM | 941213012 | Steve Wolfe | Shot #941213012
Lower density program to 8e19 from 1.1e20 fizzle. |
| Dec 13 1994 11:45:39:910AM | 941213013 | Steve Wolfe | Shot #941213013
Repeat with Lower density program to 8e19 from 1.1e20 Looks good. Disruption early in ramp-down. EF2U is completely railed for the whole shot. RXU is way further out than the programming. ZXU not too bad. Small inner and outer gaps, barely diverted but strikes are close to nominal. |
| Dec 13 1994 11:53:45:630AM | 941213014 | Steve Wolfe | Shot #941213014
Drop RXU from 0.07 to about +0.01 Drop fill to 1.4e-5 to try to avoid fizzle Didn't work, got a fizzle anyway. |
| Dec 13 1994 12:22:09:970PM | 941213015 | Steve Wolfe | Shot #941213015
Repeat- Drop RXU from 0.07 to about +0.01 Leave fill to 1.4e-5 It ran, disrupted early in rampdown. EF2U is still railed the whole time. |
| Dec 13 1994 12:27:12:810PM | 941213016 | Steve Wolfe | Shot #941213016
Drop RXU from +0.01 to 0. Drop ZXU from .09 to 0.06 fizzle. |
| Dec 13 1994 12:54:38:170PM | 941213017 | Steve Wolfe | Shot #941213017
Change RCUR rampin at end to start at 1sec, ramp slower. As on previous, Drop RXU from +0.01 to 0., ZXU from .09 to 0.06 Lasted longer, till 1.33sec. EF2U rails only between .31 and .55. |
| Dec 13 1994 01:16:59:810PM | 941213018 | Steve Wolfe | Shot #941213018
Ramp ZXU up from -.5cm to +.06 at 450msec Move RCUR in by .005 It ran. Brian poked his probe in twice. Dip in current and increase in density around 0.63 EF2U rails from 340 to 470msec. Gaps look more balanced, but still a bit small. Made it longer into ramp-down to 180kA |
| Dec 13 1994 01:33:20:730PM | 941213019 | Steve Wolfe | Shot #941213019
Move ZCUR down from 0.014 to 0.01 Move CLEARIN from -.005 to 0. Seemed to work. Disruption around 200kA. |
| Dec 13 1994 01:49:36:640PM | 941213020 | Steve Wolfe | Shot #941213020
MOve RXL out by .005, ZXL up by .005 INcrease CLEARIN Int gain from .05 to 1.0 at .5 sec. INcrease CLEARIN to +.005 Still railing EF2U. I could back off some more on ZXU I think |
| Dec 13 1994 02:23:26:100PM | 941213021 | Steve Wolfe | Shot #941213021
Back off ZXU another .01 to .05 to get EF2U off the rail. MOve RXL out earlier, and increase P gain from 3 to 5. Raise density by 10% (to 8.8e19 NL04) EF2U now just kisses 4000a. Still not getting RXL under control early |
| Dec 13 1994 02:47:18:380PM | 941213022 | Steve Wolfe | Shot #941213022
MOve RXL programming to .018 by 400 msec Raise density another 10% to 9.8e19 Drop ZCUR to 0.005 (down 5mm) OK it came out lower, RXL may be out earlier, still too far in. Got more density. |
| Dec 13 1994 03:07:36:630PM | 941213023 | Steve Wolfe | Shot #941213023
Ramp RXL out by an extra cm from .5 to 1.0sec Raise density another 10% to 1.1e20 Disrupted early in ramp down: 1.08 sec, 700kA, 260kA halo current RXL has a transition at 700msec? |
| Dec 13 1994 03:13:48:120PM | 941213024 | Steve Wolfe | Shot #941213024
Drop ZXU to 0.04 Drop density to 8.6e19, maxing at 0.5 sec Fizzle (surprise, surprise!) |
| Dec 13 1994 03:38:42:540PM | 941213025 | Steve Wolfe | Shot #941213025
Repeat=Drop ZXU to 0.04 Drop density to 8.6e19, maxing at 0.5 sec fizzle/ |
| Dec 13 1994 03:52:14:440PM | 941213026 | Steve Wolfe | Shot #941213026
Repeat=Drop ZXU to 0.04 Drop density to 8.6e19, maxing at 0.5 sec This one ran to 1.4 sec. EF2U does not rail (or only briefly) This time it looks like we got the RXL ramp. or not. |
| Dec 13 1994 04:07:40:570PM | 941213027 | Steve Wolfe | Shot #941213027
Increase ramp on RXL by 0.5cm, add ramp on ZXL by 0.5cm, from 0.5 to 1. Disrupted in ramp-down at 1.18 Still not seeing the ramps as clearly as I think we should. |
| Dec 13 1994 04:22:50:330PM | 941213028 | Steve Wolfe | Shot #941213028
Start RXL ramp further in .01, swing it out to 0.04 Draw a waveform on KAPPA (wire 9) just to be sure the reference switch happens fizzle. |
| Dec 13 1994 04:43:43:920PM | 941213029 | Steve Wolfe | Shot #941213029
Try it again: Start RXL ramp further in .01, swing it out to 0.04 Draw a waveform on KAPPA (wire 9) just to be sure the reference switch happens Turn on one Ar pulse at 300msec (17msec wide) Another fizzle. Null looks bad, late b.d. |
| Dec 13 1994 05:29:11:560PM | 941213030 | Steve Wolfe | Shot #941213030
Try it again: Start RXL ramp further in .01, swing it out to 0.04 Draw a waveform on KAPPA (wire 9) just to be sure the reference switch happens Turn on one Ar pulse at 300msec (17msec wide) Raise Br0 by 0.5mT Ran but disrupted on ramp-down. Call it a day. Br still has a serious negative lurch. Breakdown is at 7.4msec Ramp looks ok from 400 to 900, then saturates; get about 2cm of RXL ramp. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:29:07:180AM | Test | Ok | oh1, oh2u, oh2l +10ka coax test |
| 2 | 08:39:59:530AM | Plasma | Ok | no faults |
| 3 | 08:58:40:970AM | Plasma | Ok | no faults |
| 4 | 09:11:34:500AM | Plasma | Ok | no faults |
| 5 | 09:29:24:440AM | Plasma | Ok | no faults |
| 6 | 09:41:23:510AM | Plasma | Ok | no faults |
| 7 | 09:56:10:280AM | Plasma | Ok | no faults |
| 8 | 10:12:24:210AM | Plasma | Ok | no faults |
| 9 | 10:24:27:110AM | Plasma | Ok | oh2l comm fault at disruption |
| 10 | 10:54:18:690AM | Plasma | Ok | no faults |
| 11 | 11:06:05:260AM | Plasma | Ok | no faults |
| 12 | 11:19:36:140AM | Plasma | Ok | no faults |
| 13 | 11:32:02:650AM | Plasma | Ok | disruption induced comm faults, oh1 and oh2l |
| 14 | 11:52:10:110AM | Plasma | Ok | no faults |
| 15 | 12:03:53:000PM | Plasma | Ok | disruption induced comm faults, oh1, oh2u and l, ef1u |
| 16 | 12:25:41:340PM | Plasma | Ok | no faults |
| 17 | 12:37:06:720PM | Plasma | Ok | no faults |
| 18 | 01:02:08:540PM | Plasma | Ok | Comm fault OH2 L EF1 L |
| 19 | 01:21:05:250PM | Plasma | Ok | Comm fault OH1L & EF1L |
| 20 | 01:41:51:960PM | Plasma | Ok | No faults. |
| 21 | 02:04:18:140PM | Plasma | Ok | NO Faults. |
| 22 | 02:30:52:840PM | Plasma | Ok | No Faults. |
| 23 | 02:50:34:530PM | Plasma | Ok | OH1 OH2U comm faults. |
| 24 | 03:11:57:500PM | Plasma | Ok | No faults. |
| 25 | 03:24:56:260PM | Plasma | Ok | NO faults fizzle |
| 26 | 03:36:57:990PM | Plasma | Ok | No faults. |
| 27 | 03:55:10:650PM | Plasma | Ok | oh1 & oh2 comm fault. |
| 28 | 04:21:28:930PM | Plasma | Ok | NO faults |
| 29 | 04:34:56:940PM | Plasma | Ok | NO faults |
| 30 | 04:47:47:530PM | Plasma | Ok | No faults |