| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Dmitri Mossessian,Dmitri Mossessian |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Ed Fitzgerald,Bill Cochran |
| Engineering Operator Run Comment |
| MP# 320/321 Neutral Effects on the H-mode Pedestal or MP# 306 Density Li |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:31:633PM |
| Author: To Be Determined |
| Run summary for 1021030 MP 320/321 Role of neutrals in H-mode pedestal: Density scan, inboard vs outboard gas puff, inner wall limited H-mode The goal of the experiment is to study influence of the poloidal location of the neutral source on characteristics of H-mode pedestal. Run plan: Do density scan in EDA keeping pedestal temperature constant. We will change target ne shot to shot increasing RF power. Then we'll try to puff into H-mode, first from outer wall, then from inner wall. The we'll do inner wall limited H-mode. _________________________________________________ Summary: Moderately succesful run. We did some density scan - changing the H-mode density by varying target density worked well, although apparently RF did not like high density H-modes and we had troubles coupling the right amount of power into the plasma to match pedestal temperature in the high ne H-mode to that in low ne modes. We tried to modify H-mode density by puffing directly into H-mode. To do that we programed the nl in H-mode to reach higher value than that achieved without the puff. The puff did produce some density ramp, but it also apparently modified the edge conditions (SOL profiles ? midplane pressure ? - remains to be determined) that prevented RF coupling. As a result the RF tripped and H-modes terminated before the density could reach values appreciably higher than without the puffs. The innboard puff appears to work exactly the same as the outboard one. We were not able to obtain an inner wall limited H-mode. To do that we tried to run the plasma onto the inner wall when already in H-mode, but we found that the H-mode terminats as soon as plasma goes limited. Overall, we were able to obtain good pedestal measurements at different H-mode densities and comparable pedestal temperatures. It seems that the width of density pedestal does not depend on its height, as was expected. Detailed data analysis is necessary before the final conclusion can be reached. An interesting observation regarding dependence of the pedestal density on H-mode core density was made. It seems that the absolute pedestal density depends strongly on the value of pedestal density just before the L-H transition, and the core H-mode density defines the relative rise of the edge density rather than its absolute value. In pulses when RF stayed on for some time before the H-mode was triggered, the L-mode edge density was rising due to RF induced puff and the final H-mode pedestal density was ~ 50% higher than pedestal density in plasmas where H-mode was triggered right after RF was turned on. The useful shots are listed below: 1021030001 Target 0.8e20 EDA at 1 MW of J, starting at 0.9 sec (RF starts at .6 sec) Pedestal Te=350 eV, ne=2e20 --------------------- 1021030003 Target to 1.2e20 EDA starting at ~.9 again. RF is 1.5 MW tripping. Pedestal ne up to ~3e20. Pedestal Te is a bit low - 250 - 300 eV. ---------------------------- 1021030004 Target 1.2e20 EDA RF at 2 MW and tripping. Pedestal ne 30e20, Te is still low ~300 eV --------------- 1021030005 Same as 4. ------------------ 1021030006 Same as 5 ---------------------------------------------------------------------------- 1021030007 Target 1.2e20 2.5 MW RF. Higher Te pedestal - reasonable match for shot 1 ---------------------------- 1021030013 Nice H-mode, just like shot 7. RF at 2.5 MW (not very steady). Pedestal Te ~ 300 eV, ne ~ 3e20 Next shot - program feedback to produce 2.5e20 nl04 in H-mode. Target is the same. ---------------------------------------------------------------------------- 1021030014 Program feedback to produce 2.5e20 nl04 in H-mode. Target 1.2e20 EDA starts at ~0.7s, pg3 turns on at 0.8 and pufs as hard as it can. Density is rising in H-mode, but slowly. H-mode terminates at 1 sec - RF trips. ----------------------------------- 1021030015 Moved 2nd scanning probe plunge to be just before gas puff. Ask for more RF. Similar to 14 -------------------------- 1021030016 Similar to 15 --------------------------- 1021030017 Tried to ramp RF up slowly as density ramps instead of asking for high power right away. Also program slow density ramp instead of a sudden jump in H-mode. Same as 16 - RF trips soon after density starts rising --------------------------------- 1021030018 Same as 17 ---------------------- 1021030020 H-mode with inner wall puff. Core density does not change much (less that with outboard puff). RF stays until 1.12 s when nl reaches 2e20. The ne pedestal is only 2e20 even before the puff starts - comparing to 3e20 on previous shots with this core density. -------------------------- 1021030021 H-mode with inner wall puff. Density rising faster than on 20. Rf trips on nl=2e20 as before. Pedestal ne is still 2e20 - 50% lower than it was. ------------------------------------------------- 1021030022 H-mode without any gas puff. Nice EDA. Pedestal density is still 2e20, while on comparable shot (#3) it was 3e20. The explanation seems to be that pedestal density actually depends on the edge density right before the L/H transition. On shot 3 the transition happened late and dge density was as high as ~2e20 before the L/H because of the RF related puff. On shot 22 the L/H happened when RF starts, the edge density islow and pedestal is lower. ------------------------------- 1021030023 nl=0.8e20. RF 0.9 MW, H-mode starts at 1.35 s. Pedestal Te=250 - 3280 eV, ne=1.6e20 ---------------------------- 1021030024 nl=0.8e20. Late H-mode again ------------------------------ 1021030025 nl=0.6e20. Multiple H-modes, some ELM-free. Te pedestal about 300 eV. ne around 1.5e20 ------------------------------------- 1021030026 Move to inner wall limited at 1 sec nl=0.8e20. RF drops to 1.4 MW at .9 sec. Drops out of H-mode as soon as it goes limited at 1 s. ------------------------------------- 1021030027 nl=0.8e20. RF stays at 2 MW. Drops out of H-mode when plasma goes limited at 1 sec. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:16:723PM |
| Author: To Be Determined |
| Physics Operator Summary for Wed. Oct 30, 2002 MP#320/321 Netutral Effects on Pedestal parameters SL: Mossessian PO: Wolfe EO: Cochran, Fitzgerald Engineering setup: ----------------- Power Systems as on 1021024017 Overnight ECDC in D2 at 2e-4 torr off by 7:00AM Run to begin at 9:00 AM Gas setup: B-Top 6 psi D2 Hybrid Enabled (PG4) B-side lower 1 psi Ar Hybrid Enabled (PG1) B-side upper 10 psi D2 Hybrid DISABLED (PG2, for ECDC) C-Side 30 psi D2 Hybrid Enabled (PG3) J-Bottom as is, Hybrid DISABLED Enable the following gate valves, assuming no vacuum problems: ECE,VUV,DNB RF Setup: #1,3 in Run On by 7:00AM; #2 in Run On as soon as stub tuner repair is complete and Wukitch's tagout is removed. Run Plan: --------- If all three RF antennas are determined to be operational, we will run the MP#320/321 Experiment. Otherwise, we will run the MP#306 Density Limit Experiment. The determination should be made either after vacuum conditioning or a couple of plasma shots. Plan for MP#320/321: -------------------- Start from a standard EDA 800kA equilibrium (e.g. 1021024017) with a target density nl4=8e19. Start with minimum RF power consistent with getting EDA, ~1.5MW (we hope). Scan target density up in fairly large increments (1.2, 1.6, ...), and increase Prf to try to maintain the same pedestal temperature. This will presumably take several shots at each density. The idea is to document the scaling of pedestal width with pedestal density height. Continue increasing target density until H-mode density stops increasing. Then begin programming for higher H-mode density, so we get feedback controlled gas puff into the H-mode to try to increase density further, with typical increments of ~0.5e20. As before, increase Prf to maintain pedestal temperature. Continue until we run out of density range or RF, whichever comes first. At some achievable high density, replace normal fueling with inside wall gas puff from NINJA. Compare pedestal for inside fueled H-mode with normal fueling case, again changing the RF to keep the pedestal temperature constant. Starting from established EDA H-mode, move plasma onto inner wall. If it will stay in H-mode, again compare density pedestal behavior with constant pedestal temperature. [Contingency plan for MP306 Omitted.] Results -------- The run started slightly late (~9:30) to allow the RF Group to finish the repairs and checkout of E-port. This seems to have been successful, although the total power available is still not known. We began with seg2 from 1021024017, as planned, and got a good long EDA H-mode at 1MW RF at a target density of nl4=8e19. We then started the density scan with a 1.2e20 shot. Getting the pedestal temperature back to the 350eV level took 2.5MW of RF, which was achieved on shot 7. Note that shots #1-4 were taken at 5.5T (153kA) and shots 5 and afterward were at 5.4T (150kA). At the nl4=1.6e20 target level, the RF was unable to provide enough power because of repeated faulting, especially on J-port. After five futile attempts at this level, we returned to 1.2e20 on shot 13, which worked pretty much like #7, indicating that the all the antennas were still performing as they had earlier in the run. Starting from the h-mode with the 1.2e20 target, which reached an H-mode density of 1.7-1.8e20, we then began puffing into the H-mode to try to raise the density to 2.5e20. However, the RF faulted whenever nl04 got much above 2e20. Shots #14-19 were spent trying to get the Hmode (and RF) to last past this value, without success. We then went to a NINJA puff from the inner wall, replacing the extra C-side feedback-controlled puff, but this did not help the RF situation, although the midplane pressure was lower for the inner wall puff (shot 20). An attempt to increase the inner wall puff further on shot 21 caused a density-limit disruption at 1.3sec, while in L-mode. Shot #22 had no additional gas puff during H-mode, and resulted in another long eda, not unlike #7 and 13. Dmitri then decided to try for another shot at the 8e19 level, as on shot 1, but at lower RF power. Shot #23 had a late H-mode (1.3sec) at 900kW. Shot 24 was an attempt to get an earlier h-mode by starting at higher power and then dropping it to 800kW, but the early 1MW was not on long enough, and the h-mode again came late, around 1.2sec. We then dropped the density to 6e19 and got multiple H-modes, mostly Elm-free, but the last being somewhat EDA-ish. With time running out, we took two tries at moving the Hmode plasma onto the inner wall. On shot 26, we had a potentially damaging communications snafu when neither Dmitri nor I informed Brian that we were going to go limited during the shot; fortunately the ISP survived despite catching the plasma moving onto the wall on its second sweep and sweeping well into the limited plasma on the third. On neither shot did the hmode survive going limited, although the second (shot#27) had a steady 2MW of RF and the outer gap was almost constant. So we stil have no examples of an inner wall limited h-mode on C-Mod. All in all, a rather frustrating run in that, while we were able to try most of the steps in the run plan, we did not get nearly as many datapoints as we hoped. On the other hand, from the physop point of view, the machine ran very well. We had a lot of problems today with the data analysis jobs, especially the unix_submit jobs, which were increased substantially by the addition of the RF analysis. By the end of the day, it had become necessary to run efit and some thomson analysis manually in order to assess each shot. Josh rebooted daqa after the run to change the number of process blocks available, and increased a different resource quota for the event server on cmoda during the run. The logbook stopped responding to updates around shot 22, but entries could be viewed by manual do-query; this situation seems to still be present after the daqa reboot and may need to be dealt with tomorrow. A fuse in the motor drive for the #2 stub tuner failed before shot 17, and had to be replaced. The only power system problem was that the ef3 breaker pulled out after the end of shot 6, and the engineers checked in the power room for faults, and found none. TCI alignment had to be tweaked up once, but the feedback signal never failed. Scorecard --------- tests 0 duds 0 fizzles 0 plasmas 27 ======= == shots 27 |
| Session Leader Comments | |||
| Oct 30 2002 09:31:32:587AM | Dmitri Mossessian | The plan: Do density scan in EDA keeping pedestal temperature constant. We will change target ne shot to shot increasing RF power. Then we'll try to puff into H-mode, first from outer wall, then from inner wall. The we'll do inner wall limited H-mode. | |
| Oct 30 2002 09:34:57:433AM | 1021030001 | Dmitri Mossessian | EDA at 1 MW of J, starting at 0.9 sec (RF starts at .6 sec) Pedestal Te=350 eV, ne=2e20 Next shot - target to 1.2e20, RF power to 1.5 MW (J only so far) |
| Oct 30 2002 10:07:10:147AM | 1021030003 | Dmitri Mossessian | EDA starting at ~.9 again. RF is 1.5 MW tripping. Pedestal ne up to ~3e20. Pedestal Te is a bit low - 250 - 300 eV. Next shot - try higher RF - 2. MW - to get to 350 eV. |
| Oct 30 2002 10:38:41:810AM | 1021030004 | Dmitri Mossessian | EDA RF at 2 MW and tripping. Pedestal ne 30e20, Te is still low ~300 eV Next shot - try again. |
| Oct 30 2002 10:37:31:107AM | 1021030005 | Dmitri Mossessian | Same as 4. Next shot - try again. |
| Oct 30 2002 11:23:53:533AM | 1021030006 | Dmitri Mossessian | Same as 5 |
| Oct 30 2002 11:24:54:470AM | 1021030007 | Dmitri Mossessian | 2.5 MW RF. Higher Te pedestal - reasonable match for shot 1 Next shot - target to 1.6e20, request 3 MW of RF |
| Oct 30 2002 12:04:04:000PM | 1021030008 | Dmitri Mossessian | RF has problems coupling to high density. L-mode |
| Oct 30 2002 12:04:29:453PM | 1021030010 | Dmitri Mossessian | Same as 8 and 9. Next shot - drop target to 1.4e20 |
| Oct 30 2002 12:37:28:213PM | 1021030012 | Dmitri Mossessian | 11 and 12 - no H-mode. Rf does not like high density. Next shot - try to reproduce shot 7 |
| Oct 30 2002 12:50:25:820PM | 1021030013 | Dmitri Mossessian | Nice H-mode, just like shot 7. RF at 2.5 MW (not very steady). Pedestal Te ~ 300 eV, ne ~ 3e20 Next shot - program feedback to produce 2.5e20 nl04 in H-mode. Target is the same. |
| Oct 30 2002 01:16:50:493PM | 1021030014 | Dmitri Mossessian | EDA starts at ~0.7s, pg3 turns on at 0.8 and pufs as hard as it can. Density is rising in H-mode, but slowly. H-mode terminates at 1 sec - RF trips. Next shot - move 2nd scanning probe plunge to be just before gas puff. Ask for more RF. |
| Oct 30 2002 02:04:46:140PM | 1021030015 | Dmitri Mossessian | Similar to 14 Try again |
| Oct 30 2002 02:05:49:813PM | 1021030016 | Dmitri Mossessian | Similar to 15 Next shot - try to ramp RF up slowly as density ramps instead of asking for high power right away. Also program slow density ramp instead of a sudden jump in H-mode. |
| Oct 30 2002 02:36:30:400PM | 1021030017 | Dmitri Mossessian | Same as 16 - RF trips soon after density starts rising |
| Oct 30 2002 02:37:03:430PM | 1021030018 | Dmitri Mossessian | Same as 17 Next: Try again with different RF tuning |
| Oct 30 2002 02:48:22:127PM | 1021030019 | Dmitri Mossessian | No H-mode. Next: Try inner wall puff. Return to flat demand for nl and open inner valves at 0.8 s |
| Oct 30 2002 03:24:27:420PM | 1021030020 | Dmitri Mossessian | H-mode with inner wall puff. Core density does not change much (less that with outboard puff). RF stays until 1.12 s when nl reaches 2e20. The ne pedestal is only 2e20 even before the puff starts - comparing to 3e20 on previous shots with this core density. Next: repeat with more gas from inner wall |
| Oct 30 2002 03:33:57:770PM | 1021030021 | Dmitri Mossessian | H-mode with inner wall puff. Density rising faster than on 20. Rf trips on nl=2e20 as before. Pedestal ne is still 2e20 - 50% lower than it was. Next shot - adjust TS alignment and repeat shot 21. Also delayed puff 100 ms, to start around .9 s, |
| Oct 30 2002 04:24:35:463PM | 1021030022 | Dmitri Mossessian | H-mode without any gas puff. Nice EDA. Pedestal density is still 2e20, while on comparable shot (#3) it was 3e20. The explanation seems to be that pedestal density actually depends on the edge density right before the L/H transition. On shot 3 the transition happened late and dge density was as high as ~2e20 before the L/H because of the RF related puff. On shot 22 the L/H happened when RF starts, the edge density islow and pedestal is lower. Next shot - repeat shot 1 (0.8 e20) with lower RF (0.8 MW) to get lower Te pedestal |
| Oct 30 2002 04:27:04:143PM | 1021030023 | Dmitri Mossessian | nl=0.8e20. RF 0.9 MW, H-mode starts at 1.35 s. Pedestal Te=250 - 3280 eV, ne=1.6e20 Next shot - modify RF to get earlier H-mode. |
| Oct 30 2002 04:46:36:220PM | 1021030024 | Dmitri Mossessian | nl=0.8e20. Late H-mode again Next shot - go to 0.6e20 target |
| Oct 30 2002 04:48:22:990PM | 1021030025 | Dmitri Mossessian | nl=0.6e20. Multiple H-modes, some ELM-free. Te pedestal about 300 eV. ne around 1.5e20 Next hsot - go to 0.8e20 target, 2 MW RF, move to inner wall limited at 1 sec. |
| Oct 30 2002 04:56:26:083PM | 1021030026 | Dmitri Mossessian | nl=0.8e20. RF drops to 1.4 MW at .9 sec. Drops out of H-mode as soon as it goes limited at 1 s. Next shot - repeat with max RF power |
| Oct 30 2002 05:08:15:520PM | 1021030027 | Dmitri Mossessian | nl=0.8e20. RF stays at 2 MW. Drops out of H-mode when plasma goes limited at 1 sec. |
| Physics Operator Comments | |||
| Oct 30 2002 06:57:24:480AM | Steve Wolfe | Setting up PCS for 1021030 Run Import Seg2 from 1021024017 Leave seg1 alone for now, except fix baseline on pg4 | |
| Oct 30 2002 09:30:18:447AM | 1021030001 | Steve Wolfe | shot#1: Ask for RF at 1MW, starting at .6sec; they'll use J while waiting for D&E lines to pressurize. plasma full length; H-mode at .9sec to 1.5sec next shot: go to 1.2e20 on nl4 |
| Oct 30 2002 09:45:44:897AM | 1021030002 | Steve Wolfe | shot#2: go to 1.2e20 on nl4, ask for Prf to 1.4MW plasma, to 1.9sec, no h-mode. RF faulted out early. D worked late, at .7MW next shot: repeat with J+D, total request is 1.5MW |
| Oct 30 2002 10:00:36:453AM | 1021030003 | Steve Wolfe | shot#3: repeat with J+D, total request is 1.5MW plasma tp 1.9sec, hmode at .82 - 1.2sec. Almost lost the startup to the inside next shot: reduce seq1 pg4 from 27 to 23msec |
| Oct 30 2002 10:22:36:110AM | 1021030004 | Steve Wolfe | shot#4: reduce seq1 pg4 from 27 to 23msec; request 2.0MW plasma, d-faulting more than J. H-mode from .68 to 1.6, eda-ness not steady. startup still a little slow. next shot: drop the field to 150kA |
| Oct 30 2002 10:35:21:840AM | 1021030005 | Steve Wolfe | shot#5: reduce seq1 pg4 from 23 to 21msec; drop the field to 150kA plasma similar to 4. D still faulting, E comes in late up to .7MW next shot: repeat with a different mix of D and J to try to cure D trips |
| Oct 30 2002 10:46:45:363AM | 1021030006 | Steve Wolfe | shot#6: repeat with a different mix of D and J to try to cure D trips plasma, steady hmode from .71 - 1.5, D+E+J = .7+.3+1 ef3 breaker pulled after end of shot. next shot: more power |
| Oct 30 2002 11:04:41:097AM | 1021030007 | Steve Wolfe | shot#7: request 2.5MW plasma steady hmode .69-1.5sec 2.6MW through 1.1sec, then some faulting. next shot: go to nl4=1.6e20 |
| Oct 30 2002 11:23:05:970AM | 1021030008 | Steve Wolfe | shot#8:go to nl4=1.6e20, request more power - see what we get plasma Lmode Data system problem. Looks like most of store cycle isn't happening Dispatch server seems to have blown away. State thinks recool is done. |
| Oct 30 2002 11:50:20:443AM | 1021030009 | Steve Wolfe | shot#9: repeat, hope for better RF plasma L-mode, disrupts at 1.77sec, 400kA. next shot: drop seg1 pg4 from 21->20msec |
| Oct 30 2002 12:03:58:953PM | 1021030010 | Steve Wolfe | shot#10: drop seg1 pg4 from 21->20msec, plasma, L-mode, looks similar slight bounce on startup, maybe a bit low on pg4 this time. next shot: pg4 back to 21msec, drop nl4 to 1.4e20 |
| Oct 30 2002 12:16:04:713PM | 1021030011 | Steve Wolfe | shot#11: pg4 back to 21msec. nl4 to 1.4e20 plasma lmode, 1.4-1.5e20 target D&E were better (not good) but J still OTL next shot:pg4 to 23msec, repeat for better rf |
| Oct 30 2002 12:36:37:963PM | 1021030012 | Steve Wolfe | shot#12: pg4 to 23msec, repeat for better rf plasma lmode next shot: reload seg2 from shot #7 (1.2e20) |
| Oct 30 2002 12:46:02:940PM | 1021030013 | Steve Wolfe | shot#13: reload seg2 from shot #7 (1.2e20) plasma, hmode from .7 to 1.55sec looks a lot like shot 7 next shot: ask for 2.5e20 starting at .8sec (during hmode). |
| Oct 30 2002 01:03:26:687PM | 1021030014 | Steve Wolfe | shot#14: ask for 2.5e20 starting at .8sec (during hmode) plasma disrupts at 1.7sec, hmode from .7 to 1sec nl04 reaches 2e20 in hmode, then gets up to 2.3 by 1.5sec in Lmode d trips at 1.08, e at 1.23, j at .94 next shot: repeat, Yijun will try to keep rf on |
| Oct 30 2002 01:20:43:420PM | 1021030015 | Steve Wolfe | shot#15: repeat, Yijun will try to keep rf on. drop seg1 pg4 from 23 to 19msec plasma to 1.7sec, hmode stops at 1sec, so does the rf. startup a little bouncy, but no hards next shot: repeat. |
| Oct 30 2002 01:35:23:383PM | 1021030016 | Steve Wolfe | shot#16: repeat, Yijun will try to keep rf on. plasma, almost identical, except the H-L is harder to see on dalpha. next shot: try again |
| Oct 30 2002 02:06:34:750PM | 1021030017 | Steve Wolfe | shot#17: repeat, Yijun will try to keep rf on. stub tuner #2 is not moving - cell access time after a 20min delay, plasma to 1.7sec, hmode to 1sec, same as before bouncy startup, with runaways next shot: try ramping the extra density, and also the RF |
| Oct 30 2002 02:35:28:977PM | 1021030018 | Steve Wolfe | shot#18: try ramping the extra density, and also the RF; pg4 from 19->22msec plasma to 1.7sec, H/L at 1.14, made it a little longer startup still bouncey unix_submit jobs not running. next shot: pg4 from 22->24msec Yijun will try a different tack |
| Oct 30 2002 02:46:55:610PM | 1021030019 | Steve Wolfe | shot#19: pg4 from 22->24msec; increase starting value in nl4 ramp from 1.7 ->1.8 Yijun will try a different tack plasma to 1.64sec. no hmode. next shot: go to inner wall puff, put nl4 feedback back to flat |
| Oct 30 2002 03:13:13:380PM | 1021030020 | Steve Wolfe | shot#20: go to inner wall puff, put nl4 feedback back to flat at 1.2e20 plasma to 1.78sec, hmode to 1.1sec, max nl4=2e20 rf still not happy next shot: more inner wall puff |
| Oct 30 2002 03:28:56:237PM | 1021030021 | Steve Wolfe | shot#21: more inner wall puff plasma disrupts at 1.3sec, hmode ended at 1.06sec; density limit disruption rf faulting off as nl4 goes above 2e20 next shot: shorter inner wall puff. |
| Oct 30 2002 04:07:10:317PM | 1021030022 | Steve Wolfe | shot#22: no inner wall puff; pg4 down to 22msec plasma to 1.95 sec, long eda; not getting update events, but things are running. |
| Oct 30 2002 05:01:41:957PM | 1021030023 | Steve Wolfe | shot#23: down to 8e19, rf to 800kW, plasma full length l-mode until 1.3sec Still having major computer problems. next shot: try higher power early, then drop to .8MW |
| Oct 30 2002 05:01:58:143PM | 1021030024 | Steve Wolfe | shot#24: try higher power early, then drop to .8MW plasma full length, hmode at 1.2sec I'm running efit manually, the unix job just hangs. next shot: 6e19 |
| Oct 30 2002 04:50:17:290PM | 1021030025 | Steve Wolfe | shot#25: 6e19 plasma, full length but multiple elm-free hmodes. running efit manually on cmodws07 next shot: try moving 8e19 onto the wall after going into Hmode |
| Oct 30 2002 04:55:09:597PM | 1021030026 | Steve Wolfe | shot#26: 8e19; at 1sec move clearin from 0 to -.016, rcur from .659 to .651 plasma full length, multiple hmodes, but it looks like it came out of hmode when we went onto the wall outer gap went up by 4mm or so, but E was off log before that. next shot: try for higher power, keep outer gap smaller |
| Oct 30 2002 05:12:34:217PM | 1021030027 | Steve Wolfe | shot#27: try for higher power, keep outer gap smaller (rcur to .653); pg4 to 24msec plasma full length, but it went back out of hmode at 1.1sec; rf stays on at 2MW L-mode limiter density is flat at 2e20 (* fro TS, no TCI analysis on this shot). ran efit manually. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:24:01:347AM | Plasma | Ok | |
| 2 | 09:39:13:093AM | Plasma | Ok | |
| 3 | 09:53:57:277AM | Plasma | Ok | |
| 4 | 10:12:28:197AM | Plasma | Ok | |
| 5 | 10:25:36:020AM | Plasma | Ok | |
| 6 | 10:39:49:013AM | Plasma | Ok | |
| 7 | 10:57:10:183AM | Plasma | Ok | |
| 8 | 11:11:33:697AM | Plasma | Ok | |
| 9 | 11:43:19:737AM | Plasma | Ok | |
| 10 | 11:56:33:760AM | Plasma | Ok | |
| 11 | 12:11:01:977PM | Plasma | Ok | |
| 12 | 12:26:56:690PM | Plasma | Ok | |
| 13 | 12:42:11:327PM | Plasma | Ok | |
| 14 | 12:56:40:433PM | Plasma | Ok | |
| 15 | 01:11:44:617PM | Plasma | Ok | |
| 16 | 01:25:53:160PM | Plasma | Ok | |
| 17 | 01:58:41:857PM | Plasma | Ok | |
| 18 | 02:14:56:290PM | Plasma | Ok | |
| 19 | 02:43:12:233PM | Plasma | Ok | |
| 20 | 03:03:59:123PM | Plasma | Ok | |
| 21 | 03:18:34:713PM | Plasma | Ok | |
| 22 | 03:50:56:543PM | Plasma | Ok | |
| 23 | 04:04:52:983PM | Plasma | Ok | |
| 24 | 04:21:41:897PM | Plasma | Ok | |
| 25 | 04:34:43:347PM | Plasma | Ok | |
| 26 | 04:49:02:193PM | Plasma | Ok | |
| 27 | 05:01:57:893PM | Plasma | Ok | |