| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Dennis Whyte,Bruce Lipschultz,Bruce Lipschultz |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Andy Pfeiffer,Ed Fitzgerald,Bill Parkin |
| Engineering Operator Run Comment |
| MP412 in the morning). The other is for MP365, in the afternoon SL(Bruce |
| Session Leader Plans |
| Entered: Apr 7 2005 03:03:27:610PM |
| Author: Bruce Lipschultz |
| Note that there are 2 plans contained herein: 1 for MP412 in the morning). The other is for MP365, in the afternoon
MP #412a: H/D recovery by planned disruptions Goals: The plan is to examine the H/D recovery rate by planned disruption after the H/D ratio has fallen to < 10%. The goals are to 1) Compare H/D recovery to the results from the early part of the cleanup campaign when H/H+D ~ 50%, and 2) Provide fiducial shots on H/D recovery for comparison after the first boronization of the vessel walls. 3) Document effectiveness of using RF heated discharges For these reasons we will first duplicate planned disruptions that were used on the 1050211 run day. These disruptions worked well on 1050211 at removing a significant amount of H from the vessel wall, but did not impose significant delays to operations due to fizzles. We will compare both a q=2 and VDE disruption. As before we operate with closed pumping valves and examine the post-disruption gas content in the vessel. We will fuel only D into the vessel for the discharges. It will also be helpful if any improved diagnostic coverage of the disruption heat and radiation loads were available compared to 1050211. Setup requirements: Shots to load from below Need gate valve closure form the start ICRF on some shots Diagnostics: H/D, post-discharge RGA, bolometers, dust? Plasma: Target plasmas LSN, 0.8 -1 MA Requested ICRH: ~3 MW Shots shot 1. Repeat 1050211001, non-disrupting LSN 0.8 MA as fiducial. 2. q=2 disruption, OSP vertical target (1050211008) 3-5. Same, but with 2-3 MW ICRH. (2-3 shots to get RF tune) 6. q=2 disruption, ~ inner limited (1050211009) 7-8 Same with ICRH 9. VDE, downward into outboard divertor shelf (1050211018) 10. Repeat with ICRH 11. Upward going VDE (1050211014) 12. Repeat with ICRH 13. Repeat 1. as fiducial. MP# 365: Inner wall screening of impurities and deuterium Goals: The plan is to vary SSEP during a shot, from lower single-null to upper single-null (SSEP =-0.5 to +0.5). N2 will be injected and we will monitor the N level in the core using the McPherson VUV spectrograph. If the screening changes we will see the core N level increase, and then decrease after we pass far enough towards upper single null. This would be repeated for two inner wall gaps - 0.5 cm and 1.5 cm. If we can monitor the gas injection simultaneously with a low ionization state of N that would be helpful. We will simultaneously monitor both the Mo source rate at the wall and the core Mo levels using HIREX. The same test will also be done for injection of D. Ideally this is done with maximum Mo source level at the inner wall. We would like to plan for before a boronization with higher than usual current and lowish density. Setup requirements: Use as a shot 1050406026, but without RF. Adjust the inner gap to that specified below. No RF Gate valve closed for shots 8 PSI N2 in NINJA Diagnostics - HIREX Jr spectrograph, McPherson VUV spectrograph, Chromex spectrograph NII line at 463 nm), scanning probes. Plasma - at least 1 MA if not higher. nl04 ~ 1.e20. Shots 1. Set up shot with varying SSEP from -.5 to 0.5 over the time period 0.5 to 1.5 seconds (3 shots). Inner gap 0.5 cm. 2. inject N2 for one shot at 0.7 seconds. Start with an 0.1 sec puff. Vary the amount injected till a reasonable signal is seen on the McPherson. (3 shots) 3. Switch to D2 gas injection and repeat (2 shots) 4. Switch inner gap to 1.5 cm and repeat D2 injection (2 shots) 5. Switch to N2 gas injection and repeat (2 shots) |
| Physics Operators Plans |
| Entered: Apr 7 2005 03:25:59:570PM |
| Author: Jim Irby |
| Engineering Setup for Run 1050408 MP#412a Disruptive changeover (1/2 day-) Whyte/Lipschultz Irby AND MP#365 Inner wall screening of impurities Lipschultz " and D2 (1/2 day+) Overnight ECDC, bake at 60C Run begins at 09:00 and ends at 17:00 (EDT) Power systems as on 1050211001 A-coil in standard configuration (+Dtop -Dbot -Jtop +Jbot) C-coil Start=0.3sec, Invert=2.0sec Transmitters #1,2,3,4 in RUN-ON by 08:30 Gas setup: fill B-top 6psi D2 Hybrid Enabled (PG4) fill B-side lower 1psi Argon Hybrid Enabled (PG1) leave B-side Upper alone Hybrid DISABLED (PG2) fill B-main 30psi D2 Hybrid Enabled (PG3) NINJA 8 psi Nitrogen Enable: ECE, VUV, Z-bolo shutter Setup to close gatevalves in pulse for 5 minutes. |
| Session Leader Summaries |
| Entered: Apr 8 2005 05:26:58:277PM |
| Author: Bruce Lipschultz |
|
Session leader summary second half of 1050408 - MP MP# 365: Inner wall screening of impurities and deuterium Goals: The plan is to vary SSEP during a shot, from lower single-null to upper single-null (SSEP =-0.5 to +0.5). N2 will be injected and we will monitor the N level in the core using the McPherson VUV spectrograph. If the screening changes we will see the core N level increase, and then decrease after we pass far enough towards upper single null. This would be repeated for two inner wall gaps - 0.5 cm and 1.5 cm. If we can monitor the gas injection simultaneously with a low ionization state of N that would be helpful. We will simultaneously monitor both the Mo source rate at the wall and the core Mo levels using HIREX. The same test will also be done for injection of D. Ideally this is done with maximum Mo source level at the inner wall. We would like to plan for before a boronization with higher than usual current and lowish density. Results: Had trouble getting going. Started around shot 21 - late start and it is hard to set up a constant inner gap while varying SSEP. We also had trouble identifying N lines we were happy about. Got going well by shot 27, identified 2 N lines (see spectroscopy). N puff clearly shows up on Chromex as a constant N intensity during the puff. On the core lines it appears to drop, assuming we have identified the correct lines. The core N inrtnesity does not seem to vary with SSEP, just comes up and then, after peaking drops with time. In other words even for comparing USN to LSN it is not symmetric. Less goes into the core from DN to USN. So one possibility is that we are cooling the edge too much with the puff to get the core signal up and that leads to changes in penetration. Another aspect that clouds the results is the appearance of a MARFE like attributes on the D_alpha signal. Although not obvious on the cameras, there was a correlation of the core N intensity and the appearance of large fluctuations on the D_alpha. So the appearance of these flutuations appears to cause more N to go into the core. We looked at HiJr Mo intensity. This did not seem affected by SSEP, dropping into the shot, probably due to a reduction in souurce from the N2 puff. The Chromex did not show any Mo source at the inner wall. We did not get to the D2 puff. Bottom line - no obvious effect of SSEP on screening of N2. We may have cooled the SOL too much. Brian will look at the SOL profiles taken on the last shot or two and comment on the profiles during the puff. |
| Entered: Apr 11 2005 12:08:33:833AM |
| Author: Dennis Whyte |
| Overall a successful experiment and we completed
the run plan. We were slowed down in the early part of the day by some computer glitches. The machine ran well after these problems were solved. Obtained 8 disruption shots and 3 fiducial shots with no disruption. 3 disruptions were obtained with ICRH heating of target plasma. The plasma H/(H+D) was ~ 5% for most of the run day. This was clearly reflected in the gas recovery, where H/(H+D) was ~ 10%, rather than the 40-70% seen during our first run earlier in the campaign (1050211). Analysis shows that the H/(H+D) ratios of the recovered gas correlates linearly to the target plasma H/(H+D), but with a linear coefficent ~ 1.8. This is consistent with wall fuelling dominating plasma content and that the disruption cleaning "samples" the wall H/D ratio in a similar manner to the quiescent plasmas. Almost all of the Hydrogen recovered today was in the form of HD, rather than H2. Since only D2 is injected into C-Mod, this confirms the important role that isotope exchange is playing in setting the H/D ratio. The amount of gas released from the wall was less than seen on our first run day. The best comparisons are downward VDE's that had nearly identical target plasma condition (1050211018 vs. 1050408018). Today's shot recovered only 10.2 Torr-L of gas, while the old shot recovered 34.5 Torr-L. Both shots had about 13 Torr-L of D2 fuelling. If one works from the assumption that the gas recovery is simply based on surface heating, then this suggests that the total fuel content of the wall (or at least the lower divertor shelf where this VDE hits) is a factor of 3.5 less than when we started conditioning. This would be consistent with the idea conditioning actually drives down the total hydrogenic concentration at the near-surface, which we believed started near 10-20% based on ion beam analysis. As in the first run day, there was a strong correlation between the store energy/Te of the target plasma and the amount of gas recovered. The two VDE target plasmas with ICRH heating recovered substantial (~40-50 Torr-L) of gas from the wall. Good fiducial shots were obtained without any disruptions. The wall pumping is surprisingly strong on C-Mod, given that the Boron has been mostly removed from the tile surfaces. For standard 0.8 MA shots, roughly 1/2 of the D2 injected is left behind in the wall (~ 7 Torr-L /shot). This is about the same as obtained on graphite-clad devices? The reasons for this wall pumping, which does not appear to saturate, remain under investigation. Due to the disruption clearning the overall gas balance was positive for the whole day (i.e. we recovered more gas than injected) Total D injected (D2): 152 Torr-L Total D recovered: 165 Torr-L Totat H recovered: 25.2 Torr-L The gas balance and post-discharge RGA worked very well today. We confirmed the gas calibration accidentally In a few shots (e.g. 001) with gas injection only and fizzles. The injected and retrieved D2 gas were within 0.2 Torr-L , an acceptable uncertainty. |
| Physics Operator Summaries |
| Entered: Apr 8 2005 05:27:47:170PM |
| Author: Jim Irby |
| Data system problems caused loss of data on shot 03, and continued to cause some slowdowns for a few more shots. A problem with the matrox computer in the cell may have contributed to the problems. On the other hand, we did get more information about he hydrogen evolution from the programmed disruption discharges. VDE induced disruptions were begun on shot 13. These discharges seemed to be equally happy going up or down to disruption. On shot 16 Steve Wolfe suggested we reduce clearin from .01 to .005 cm to make the plasma more stable until we were ready to drive it down. This change seemed to help; at least the next disruption did go down. The second half of the run was tricky from the physop point of view since it required keeping constant gaps while sweeping SSEP from -1.0 to 0.5 cm from 0.5 to 1.5 s. Several "tune-up" shots were required with tweaks and ramps added to clearin. We should consider a better way to make these adjustments. We are still having some problems with the firewire triggers. During the first half of the run they were triggering about 1/2 s early. Without much icrf during this run, the RGA impurity levels remained pretty low. H/(H+D) ranged from 4 to 7% during the day. Tests 01,02,05,06,07,08 6 Duds 17,22 2 Fizzles 16 1 Plasmas 03,04,09,10,11,12,13,14,15,18, 19,20,21,23,24,25,26,27,28,29,30,31 22 |
| Session Leader Comments | |||
| Apr 8 2005 10:15:55:297AM | 1050408001 | Dennis Whyte | Fiducial shot without plasma.
Good gas balance between injected (2.9 Torr-L) compared to vessel inventory (2.7 Torr-L) |
| Apr 8 2005 09:49:14:670AM | 1050408004 | Dennis Whyte | Fiducial shot without disruption.
About 5 torr-L wall pumping. 12 torr-l in, 7 torr-l out RGA shows basically D2 H/(H+D) ~ 4% and fairly constant in shot. |
| Apr 8 2005 10:56:42:703AM | 1050408009 | Dennis Whyte | Repeat ohmic fiducial shot without disruption (Compared 004).
Injected D2 ~ 13.2 Torr-L (pre-shot RGA had mostly M=28) Post-shot: 5.4 Torr-L RGA dominated by M=4 (D2) |
| Apr 8 2005 11:26:47:563AM | 1050408010 | Dennis Whyte | q=2 disruption at 1.67 s
Ip started ramping down that decrease Wth to ~ 20 kJ and Te ~ 0.9 keV. So fairly cold disruption. Injected D2: 14.3 Torr-L Recovered D2: 12 Torr-L Post disruption RGA: dominated by D2 |
| Apr 8 2005 11:42:23:390AM | 1050408011 | Dennis Whyte | Attempted q=2 disruption
Had 3 MW ICRH, stored energy peaked at 80 kJ but rapidly decreased as the ICRH moved off resonance with the Bt rampdown. Early disruption with q=3.4 at 0.95 s with Wth ~ 15 kJ Density inreased and Te plummets to ~300 eV...caused by ICRH into walls causing impurity injection? By disruption P_oh= 2 MW...very resistive plasma. Injected D2: 12.6 Torr-L Recovered gas: 16 Torr-L Post disruption RGA: dominated by D2 and Mass 6? |
| Apr 8 2005 11:53:35:517AM | 1050408012 | Dennis Whyte | q=2 disruption
No ICRH Disruption at 1.6 s at q=2 with inner wal limited Wth ~ 20 kJ and Te ~ 900 eV Plasma density jumped up due to inner wall limiting, this pushed the Te down. 2pi bolometer suggest Prad ~ Poh Injected D2: 16 Torr-L Recovered gas: 11.5 Torr-L Post disruption RGA: dominated Mass4 and Mass3 So HD still coming out of the wall |
| Apr 8 2005 12:04:28:267PM | 1050408013 | Dennis Whyte | VDE disruption
No ICRH Disruption at 1.05 s , LSN shape Wth ~ 30 kJ and Te ~ 2 keV Injected D2: 13 Torr-L Recovered gas: Torr-L Post disruption RGA: dominated Mass4 and Mass3 problem with RGA timing for preshot |
| Apr 8 2005 12:28:20:017PM | 1050408014 | Dennis Whyte | VDE disruption...upward going VDE
3 MW ICRH Disruption at 0.94 s , LSN shape Wth ~ 90 kJ and Te ~ 3 keV Injected D2: 9 Torr-L Recovered gas: 34.6 Torr-L Good gas recovery shot, clearly correlated to stored energy and Te at disruption Post disruption RGA: clear increase in H2 in comparison to previous shots today M2/M4 ~ 0.2 Also M=5 and M=6, likely D2H and D3 from ionization in analyzer |
| Apr 8 2005 12:46:32:580PM | 1050408015 | Dennis Whyte | VDE disruption, went down
2-3 MW ICRH Disruption at 0.95 s , LSN shape Wth ~ 92 kJ and Te ~ 3 keV Injected D2: 10.7 Torr-L Recovered gas: 51 Torr-L Good gas recovery shot. H/H+D ~ 0.05 M2/M4 ~ 0.1 |
| Apr 8 2005 12:50:33:733PM | 1050408016 | Dennis Whyte | Fizzle (first of the day) |
| Apr 8 2005 01:11:44:093PM | 1050408017 | Bruce Lipschultz | dud
This one may be useful as one calibration shot of the gas in vs out. We know the 4.06 m3 is a tad high. That is consitent what we see in the comparison of what went int owhat came out. Also good to compare this shot to the fizzle which has a little plasma there at the beginning. |
| Apr 8 2005 01:34:49:080PM | 1050408018 | Bruce Lipschultz | VDE disruption, went down
No ICRH Note: a small amount of Ar had been going in up till this shot. Turned off now. Disruption at 1.04 s , LSN shape Wth ~ 33 kJ and Te ~ 2.2 keV Injected D2: 12.6 Torr-L Recovered gas: 10 Torr-L Good gas recovery shot. RGA (mass 3)/(mass 4) ~ 2.1/9.2 ~ .23 RGA M2/M4 ~ 0.26/9.23 ~ .03 H/H+D plasma measurement ~ 6% Next shot fiducial, reload shot 4 |
| Apr 8 2005 01:55:10:527PM | 1050408019 | Bruce Lipschultz | VDE disruption, went down
No ICRH Disruption at 1.04 s , LSN shape Wth ~ 25 kJ and Te ~ 2.2 keV Injected D2: 12.6 Torr-L Recovered gas: 9.8 Torr-L Good gas recovery shot. Plasma h/(H+D) ~ 6% RGA (mass 3)/(mass 4) ~ 2.1/9.2 ~ .2 M2/M4 ~ 0.26/9.23 ~ .03 Next shot try for fiducial again, reload shot 4 |
| Apr 8 2005 01:55:13:400PM | 1050408020 | Bruce Lipschultz | Fiducial shot
No ICRH Disruption during current inversion, LSN shape Stored energy around 30 kJ, Te=2 keV Injected D2: 14.7 Torr-L Recovered gas: 8.9 Torr-L Good gas recovery shot. Plasma h/(H+D) ~ 4% RGA (mass 3)/(mass 4) ~ 2.1/9.2 ~ .2 M2/M4 ~ 0.26/9.23 ~ .02 |
| Apr 8 2005 02:11:00:653PM | 1050408021 | Bruce Lipschultz | Setup of shot for MP 365
No gate valve closed Lost intereferometer and all diag. with gate valves inner gap too large (1 cm) ssep sweep not implemented. |
| Apr 8 2005 02:33:20:527PM | 1050408022 | Bruce Lipschultz | dud |
| Apr 8 2005 02:52:00:497PM | 1050408023 | Bruce Lipschultz | shot still being tuned up (ssep roughly ok but gap too large and varying) |
| Apr 8 2005 03:11:34:120PM | 1050408024 | Bruce Lipschultz | shot closer. N2 puffed at 0.7 seconds for 0.1s. However, MARFE obfuscates its effect. Have not found a good line on the McPherson to follow. COntinue to try puffs and get plasma tuned up (no MARFE, inner gap steady).
|
| Apr 8 2005 03:29:24:793PM | 1050408025 | Bruce Lipschultz | Shot equilibrium still there.
N2 puffed at 0.7 seconds for 0.1s. Saw plenty of lines on Chromex. Brief signature on McPherson. 2 tl of gas injected. Back off on pressure and puff for 0.4 seconds next. |
| Apr 8 2005 03:51:41:997PM | 1050408026 | Bruce Lipschultz | Shot pretty good
N2 puffed at 0.6 seconds for 0.4 but lower pressure (5 PSI) Saw plenty of lines on Chromex. McPherson lines not clear. Need more N2. Back up on pressure to 7.5 PSI and keep 0.4 s pulselength. ALso, change the starting SSEP to -1. |
| Apr 8 2005 04:28:00:183PM | 1050408027 | Bruce Lipschultz | Shot pretty good
Same N2 puff. Chromex shows steady source. If we have the correct McPherson wavelength then things have changed. We no longer get the jump in McPherson signal. Try again with another wavelength next shot. |
| Apr 8 2005 04:51:37:170PM | 1050408029 | Bruce Lipschultz | Shot pretty good
Same N2 puff. Chromex shows steady source. If we have the correct McPherson wavelength then things have changed. We no longer get the jump in McPherson signal. Try again with another wavelength next shot. |
| Apr 8 2005 04:55:42:997PM | 1050408030 | Bruce Lipschultz | Shot pretty good
Increased gap to sslightly larger than 1 cm. MARFE-like event at around 1.1 sec clouding the issue. N2 puff affecting the density. Chromex shows steady source. The McPherson story is not clear. Some shots it increases around SSEP =0, some not. |
| Apr 8 2005 05:14:13:560PM | 1050408031 | Bruce Lipschultz | Shot pretty good
Lowered the density from nl04 =1 to 0.8 before the puff. Left gap ~ 1 cm. MARFE-like event at around 1.1 sec again. |
| Physics Operator Comments | |||
| Apr 8 2005 08:22:56:143AM | Jim Irby | Did a load from 1050211001 Clearin offset set to zero in seg 2, 3, and 4. IP offset set to zero in seg 2, 3, and 4. loaded seg 1 from 1050407027 into seg 1 | |
| Apr 8 2005 08:27:28:597AM | 1050408001 | Jim Irby | LH video okay Boron video okay wide1 video okay jant video NOT okay --- did a power cycle on the cameras G-sider pressure gauge was off --- now on |
| Apr 8 2005 08:42:43:550AM | 1050408002 | Jim Irby | G-side gauge should be on power cycle of cameras done g-side working --- pressure high jant, boron, wide1 are now working, but missing LH! rebooting Sherman |
| Apr 8 2005 09:23:49:117AM | 1050408003 | Jim Irby | prepuff from 18 to 16 ms PHYSOP screwup --- forgot to load/clean plasma into rampdown h/(h+d) at 2% |
| Apr 8 2005 09:36:20:297AM | 1050408004 | Jim Irby | loaded 1050211001 plasma into rampdown --- got density requested boron camera looks great, but other cameras off by .5 s again lost lots of data --- Josh and Tom unable to recover |
| Apr 8 2005 09:54:00:517AM | 1050408005 | Jim Irby | repeat with all the data we hope no luck --- no power cycle test still data system problems |
| Apr 8 2005 10:38:34:140AM | 1050408007 | Jim Irby | Another cycle test |
| Apr 8 2005 10:43:59:547AM | 1050408008 | Jim Irby | cycle test --- data system looks much better |
| Apr 8 2005 10:55:56:127AM | 1050408009 | Jim Irby | Going for plasma plasma into rampdown h/(h+d) at 4% |
| Apr 8 2005 11:42:13:390AM | 1050408010 | Jim Irby | loaded shot 1050211008 into seg 2 zeroed clearin and IP offsets disruption at 1.66 s --- a little late |
| Apr 8 2005 11:30:10:047AM | 1050408011 | Jim Irby | TF rampdown started at 0.4 from 0.5 s disruption at .93 s 3 MW of rf |
| Apr 8 2005 11:53:12:860AM | 1050408012 | Jim Irby | loaded 1050211009 into seg 2--- move to inner wall zeroed clearin and ip disruption at 1.63 s lots of runaways |
| Apr 8 2005 12:07:04:703PM | 1050408013 | Jim Irby | loaded shot 1050211018 into seg 2 --- VDE disruption cleared IP and clearin disrupted at 1.02 s |
| Apr 8 2005 12:24:25:360PM | 1050408014 | Jim Irby | repeat DPCS with 3 MW of rf increased pg3 from 60 to 80 volts to help neuts/hards disruption at 0.94 s neuts/hards down VDE went up |
| Apr 8 2005 12:35:10:843PM | 1050408015 | Jim Irby | repeat disruption at 0.94 s |
| Apr 8 2005 12:51:37:280PM | 1050408016 | Jim Irby | dropped clearin from .01 to .005 cm --- make plasma a little more stable until we are ready to drive it down. no rf for this shot fizzle |
| Apr 8 2005 01:07:32:390PM | 1050408017 | Jim Irby | try again dud |
| Apr 8 2005 01:23:07:687PM | 1050408018 | Jim Irby | added 2 ms of gas to prepuff ef4 from -1345 to -1320 A disruption at 1.03 s disruption when down as we had hoped |
| Apr 8 2005 01:37:18:203PM | 1050408019 | Jim Irby | intended to load 1050408004 into seg 2 --- but forgot to load it! repeat of shot 18 disruption at 1.03 s |
| Apr 8 2005 01:46:00:093PM | 1050408020 | Jim Irby | loaded 1050408004 plasma into rampdown |
| Apr 8 2005 02:16:59:357PM | 1050408021 | Jim Irby | loaded shot 1050406026 into seg2 clearin from 0.0 to -0.005 m rcur from .656 to .658 m plasma into rampdown TCI gatevalves along with other diagnostic valves were closed !! |
| Apr 8 2005 02:32:55:277PM | 1050408022 | Jim Irby | loaded double null shot 1050405025 into seg 4 nl04 request to 1.e20 /m^2 clearin from 0.0 to -.0075 m dud! |
| Apr 8 2005 02:55:55:543PM | 1050408023 | Jim Irby | prepuff increased by 2 ms ef4 back to -1345 from -1320 A plasma into rampdown ssep did sweep has requested from -.5 to .5 cm from .5 to 1.5 s clearin too large |
| Apr 8 2005 03:17:48:777PM | 1050408024 | Jim Irby | clearin ramped down to keep left gap smaller and more constant plasma into rampdown inner gap much closer but still need stronger ramp |
| Apr 8 2005 03:32:50:870PM | 1050408025 | Jim Irby | double ramp added to clearin in attempt to keep it closer to 0.5 cm added .3 cm to RCUR gaps left and right not right |
| Apr 8 2005 03:44:24:760PM | 1050408026 | Jim Irby | rcur from .66 to .665 m increased downward ramp on clearin after 0.8 s plasma into rampdown gaps look good |
| Apr 8 2005 04:02:43:403PM | 1050408026 | Jim Irby | ssep ramp from -.01 to +.005 m from 0.5 to 1.5 s plasma into rampdown left gap a little too close from 1 to 1.2 s |
| Apr 8 2005 04:14:32:887PM | 1050408028 | Jim Irby | increased clearin from 1 to 1.2 s prop gain in nl_04 from 8 to 9 plasma into rampdown over comp on left gap --- will reduce next shot |
| Apr 8 2005 04:31:14:510PM | 1050408029 | Jim Irby | reduced upward jump in clearin from 1 to 1.2 s added 1 ms to prepuff gas --- fields still look good plasma into rampdown clearin better |
| Apr 8 2005 04:51:00:967PM | 1050408030 | Jim Irby | added .005 m to clearin to increase the inner gap plasma into rampdown clearin better |
| Apr 8 2005 05:26:49:760PM | 1050408031 | Jim Irby | density request from 1e20 to 7e19 /m^2 disruption at 1.29 s |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:16:24:100AM | Test | Ok | cycle-test |
| 2 | 08:29:05:223AM | Test | Ok | |
| 3 | 09:01:53:283AM | Plasma | Ok | |
| 4 | 09:18:53:927AM | Plasma | Ok | |
| 7 | 10:08:58:407AM | Test | Bad | |
| 8 | 10:35:09:080AM | Test | Ok | |
| 9 | 10:44:37:127AM | Plasma | Ok | |
| 10 | 11:03:58:690AM | Plasma | Ok | |
| 11 | 11:21:17:970AM | Plasma | Ok | |
| 12 | 11:42:24:313AM | Plasma | Ok | |
| 13 | 11:54:52:440AM | Plasma | Ok | |
| 14 | 12:07:20:343PM | Plasma | Ok | |
| 15 | 12:29:21:703PM | Plasma | Ok | |
| 16 | 12:45:07:377PM | Plasma | Ok | |
| 17 | 01:00:16:373PM | Plasma | Ok | |
| 18 | 01:13:22:470PM | Plasma | Ok | |
| 19 | 01:25:54:313PM | Plasma | Ok | |
| 20 | 01:38:18:377PM | Plasma | Ok | |
| 21 | 01:58:40:870PM | Plasma | Ok | |
| 22 | 02:27:14:997PM | Plasma | Ok | |
| 23 | 02:39:49:247PM | Plasma | Ok | |
| 24 | 02:57:33:903PM | Plasma | Ok | |
| 25 | 03:19:41:403PM | Plasma | Ok | |
| 26 | 03:36:03:683PM | Plasma | Ok | |
| 27 | 03:51:59:090PM | Plasma | Ok | |
| 28 | 04:06:29:590PM | Plasma | Ok | |
| 29 | 04:25:01:497PM | Plasma | Ok | |
| 30 | 04:38:01:997PM | Plasma | Ok | |
| 31 | 04:52:11:963PM | Plasma | Ok | |