| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Jerry Hughes |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Bill Byford,Bill Parkin |
| Engineering Operator Run Comment |
| MP #410 Extention Pedistal Scaling EO Pierson PO Snipes SL Hughes |
| Session Leader Plans |
| Entered: Jun 23 2005 11:52:03:113AM |
| Author: Jerry Hughes |
| This run will collect edge profile data over a range of Bt, Ip, with
RF power varied during each shot. We will run long H-modes in some shots, and administer a D2 puff from the NINJA (usually from the inner wall, but we might try outboard puffing too). *NINJA enabled with 40psi D2. *GPC2 should start the day set to ~4.4T, with a change to 5.4T partway through run. *GPI camera should be configured to image background D-alpha. A. Begin by loading 1050428027 (Bt=4.4 T, Ip=0.9MA, nl~0.9e20). RF request: flat 2.0MW from 0.60-0.80s flat 2.5MW from 0.95-1.15s flat 3.0MW from 1.30-1.50s Run until satisfactory data are obtained. B. Run a series of shots using same RF scheme, but with different Ip, Bt. ~2 shots: 4.4T, 1.2MA (q95~2.6) nl=1.2e20 ~1 shot: 4.4T, 0.9MA (q95~3.5) nl=0.9e20 ~1 shot: 4.4T, 0.6MA (q95~5.2) nl=0.6e20 ~1 shot: 4.4T, 0.4MA (q95~7.8) nl=0.4e20 C. Lab access to change GPC over to 5.4T. Run these shots with same RF scheme, except were noted: ~2 shots: 5.4T, 0.4MA (q95~9.6) nl=0.4e20 ~2 shots: same as previous, with 2.5MW RF from 0.7-1.3s; D2 puff from 1.0-1.5s ~1 shot: 5.4T, 0.6MA (q95~6.4) nl=0.6e20 ~2 shots: same as previous, with 2.5MW RF from 0.7-1.3s D2 puff from 1.0-1.5s ~1 shots: 6.2T, 0.6MA (q95~7.3) nl=0.6e20 ~1 shots: 6.2T, 0.9MA (q95~4.9) nl=0.9e20 ~1 shots: 5.4T, 0.9MA (q95~4.3) nl=0.9e20 ~2 shots: same as previous, with 2.5MW RF from 0.7-1.3s D2 puff from 1.0-1.5s ~1 shots: 5.4T, 1.2MA (q95~3.2) nl=1.2e20 ~2 shots: same as previous, with 2.5MW RF from 0.7-1.3s D2 puff from 1.0-1.5s ~1 shots: 6.2T, 1.2MA (q95~3.7) nl=1.2e20 ~2 shots: 6.2T, 1.5MA (q95~2.9) nl=1.5e20 ~2 shots: 5.4T, 1.5MA (q95~2.6) nl=1.5e20 ~2 shots: 6.2T, 1.8MA (q95~2.4) nl=1.5e20 SL reserves the right to play with these exact parameters and the ordering of shots. Essential diagnostics: Thomson, GPC, TCI, bolometry, PCI. Scanning probes, if available. Will use GPI camera to image background D-alpha, and will probably want to adjust gains on the Xybion camera on the fly. |
| Physics Operators Plans |
| Entered: Jun 23 2005 11:49:13:973AM |
| Author: Joseph Snipes |
| Engineering setup for Friday, 24 June 2005 MP#410 Extension of pedestal scaling Session leader: J. Hughes Physics operator: J. Snipes ** Boronize Thursday night ** 120 psi 50/52/103 (Rmin/Rres/Rmax) Followed by 4 hours ECDC in He, and then by 1-2 hours ECDC in D2, ending 2 hours before run. Run begins at 09:00 and ends at 17:00. Power systems as on 1050428027 (4.4T, 0.9MA) A-coil configuration: normal [+Dtop -Dbot -Jtop +Jbot] and enabled. Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper with whatever Hybrid disabled fill B-main (C-side) with 30 psi D2 Hybrid enabled (PG3) NINJA 40 psi D2 Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo shutters ------------------------------------------------------------------------------- ICRF Setup: All transmitters in run on at 08:30. Run Plan: The run plan calls for running a number of toroidal fields and currents to scan the H-mode pedestal. The plasma current will range from 0.4 MA to 1.8 MA and the toroidal field from 4.4 T to 6.2 T. ICRF up to 3 MW will be required. See the SL_PLAN for a detailed run plan. |
| Session Leader Summaries |
| Entered: Jun 24 2005 05:53:30:850PM |
| Author: Jerry Hughes |
| MP410: Extension of pedestal scalings
SL: J. Hughes PO: J. Snipes The purpose of this run was to push machine parameter space in current and field and examine pedestal profiles at each data point. Some shots from run 1050428 were repeated for purposes of comparison, since we began today with a fresh boronization, and the previous run was far from well-conditioned. Radiated power was low at the beginning of the day, and good EDA H-modes were obtained using 2--3MW ICRF. As the day progressed, radiated power increased, even for shots that should have been solidly EDA, such as the 5.4T, 0.9MA shot 19. The indication seems to be the boronization does not last a single day. Large D2 puffs from the NINJA system were administered into several discharges, resulting in reduced radiative power and steadier H-modes. However, at lower Ip, and thus lower pedestal density, the massive gas injections tended to kill the H-modes, rather than preserve them. Plenty of good edge Thomson and PCI data were obtained, as well as background D-alpha from the GPI camera. All in all, a successful run, covering most of the parameter space called for in Part I of MP 410. Thanks to everyone who helped with this run. |
| Physics Operator Summaries |
| Entered: Jun 24 2005 05:20:00:690PM |
| Author: Joseph Snipes |
| It was an excellent run. The machine ran very well over a broad range of plasma currents, toroidal fields, and densities. All except the very highest current point at 1.8 MA requested by the run plan were achieved. We learned that the DNB pumps the chamber substantially so that the prepuff needs to be increased by several ms (20%) to provide enough gas for the breakdown when the DNB gate valve is open and that if the DNB gate valve is then closed, the prepuff needs to be programmed several (3 - 4 ms) lower to get a sustained breakdown. We managed to run several 1.5 MA full length plasmas at both 6.2 T and 5.4 T, though one disrupted due to an injection. When we attempted 1.8 MA at 6.2 T, however, the plasma disrupted at 1.6 MA apparently because the current limit on EF3 was set too low. It was set to 12 kA, but actually limited the current to 10.5 kA. So, in order to run such high currents, we need to increase the EF3 current limit to 15 kA. Despite the two high current disruptions, the machine ran very well. See the session leader summary for more physics details.
Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result | 01 1.878 0.898 Plasma | 02 0.000 0.027 Fizzle | | 03 1.784 0.901 Plasma | 04 0.000 0.028 Dud | | 05 1.678 1.188 Plasma | 06 0.000 0.027 Dud | | 07 1.947 1.201 Plasma | 08 1.954 0.916 Plasma | | 09 1.970 0.721 Plasma | 10 1.973 0.715 Plasma | | 11 1.974 0.729 Plasma | 12 1.978 0.719 Plasma | | 13 1.978 0.718 Plasma | 14 1.511 0.721 Plasma | | 15 1.975 0.716 Plasma | 16 1.082 0.710 Plasma | | 17 1.980 0.713 Plasma | 18 1.973 0.930 Plasma | | 19 1.969 0.923 Plasma | 20 1.737 0.925 Plasma | | 21 1.852 1.209 Plasma | 22 1.937 1.210 Plasma | | 23 1.950 1.210 Plasma | 24 0.000 0.026 Fizzle | | 25 1.706 1.213 Plasma | 26 0.000 0.025 Fizzle | | 27 1.956 1.212 Plasma | 28 1.904 1.500 Plasma | | 29 1.911 1.500 Plasma | 30 0.832 1.579 Plasma | | 31 1.868 1.501 Plasma | 32 1.847 1.493 Plasma | | 33 1.630 1.492 Plasma | 34 0.000 0.039 Fizzle | | 35 0.864 1.676 Plasma Date 1050624: 35 shots. 29 plasmas. 4 fizzles. 2 duds. 0 System Error. |
| Session Leader Comments | |||
| Jun 24 2005 09:20:37:843AM | 1050624001 | Amanda Hubbard | GPC2 set to 1.8 mm for the low Bt shots. Ch 2 gettingout to 87.4 cm.
GPC spanning center, T0 at Ch 6. Serious cutoff in H-modes. |
| Jun 24 2005 09:30:25:827AM | 1050624001 | Jerry Hughes | 4.4T, 0.9MA. Shot ran properly. nl exceeds target after 0.6s. J-port gives no
power. 2 H-modes at ~1,1.3MW. QCM is there. Next shot: re-attempt. |
| Jun 24 2005 09:32:11:467AM | 1050624002 | Jerry Hughes | No plasma.
Next shot: re-attempt |
| Jun 24 2005 09:49:35:093AM | 1050624003 | Jerry Hughes | 4.4T, 0.9MA. Goes into H-mode at ~1.1MW, and stays there even efter RF shuts
off. QCM is clearly there. Next shot: Ip to 1.2MA, nl04->1.2e20 |
| Jun 24 2005 09:51:30:593AM | 1050624004 | Jerry Hughes | No plasma
Next shot: re-attempt |
| Jun 24 2005 10:23:29:827AM | 1050624005 | Jerry Hughes | Pretty good. 4.4T, 1.2MA, Long H-mode, QCM is pretty clear, even at q~2.8.
Power room access for RF guys. Next shot: re-attempt, try to get more power |
| Jun 24 2005 10:23:57:093AM | 1050624006 | Jerry Hughes | No plasma
Next shot: retry 5, but with nl04-->0.9e20 |
| Jun 24 2005 10:39:54:450AM | 1050624007 | Jerry Hughes | 4.4T, 1.2MA. A few ELM-free H-modes. Lowering target density seems to have
worked. Next shot: Ip-->0.9MA, nl04-->0.7e20. Basically shot 3 with lower target nl. |
| Jun 24 2005 10:53:48:890AM | 1050624008 | Jerry Hughes | 4.4T, 0.9MA. H-modes look ELM-free, but QCM is sometimes there.
Next shot: Ip-->0.6MA, nl04-->0.6e20. |
| Jun 24 2005 11:21:28:577AM | 1050624009 | Jerry Hughes | 4.4T, 0.6MA. 3 H-modes. QCM is broader at this current.
Next shot: Ip-->0.4MA, nl04-->0.4e20 |
| Jun 24 2005 11:20:22:750AM | 1050624010 | Jerry Hughes | 4.4T, 0.4MA. Some weak H-modes. J-port kind of ratty. First H-mode kicks in
before Ip has reached a stable value. QCM is there, and broad. Radiated power much lower than for the same discharge on 1050428. Next shot: repeat. |
| Jun 24 2005 11:40:06:577AM | 1050624011 | Amanda Hubbard | On this and shot 10, note that sawteeth disappear for long periods duing H-modes. An effect of ITBs?? Or locked modes? |
| Jun 24 2005 11:42:44:843AM | 1050624011 | Jerry Hughes | 4.4T, 0.4MA. 3 H-modes. QCM very broad.
Next shot: Bt-->5.4T |
| Jun 24 2005 11:39:24:967AM | 1050624012 | Amanda Hubbard | GPC2 changed to 1.5 mm, for 5.4-6.2 T. Will take a shot or two to calibrate as I haven't used this grating in a while. |
| Jun 24 2005 11:49:58:467AM | 1050624012 | Jerry Hughes | 5.4T, 0.4MA. Good shot. q95~9. 3 EDA H-modes. Prad higher in first H-mode than in
the others. Next shot: repeat |
| Jun 24 2005 11:59:26:670AM | 1050624013 | Jerry Hughes | 5.4T, 0.4MA. Almost identical to shot 12. 3 H-modes.
Next shot: Same plasma, long RF pulse, D2 puff beginning at 1s. |
| Jun 24 2005 12:26:07:623PM | 1050624014 | Jerry Hughes | 5.4T, 0.4MA. Inner wall NINJA capillary was set up to open at 0.9s.
RF is good. Fairly hot pedestal, with some ELMs. Shortly after 1s, puff comes in, kills the H-mode. Looks like 2 or 3 TS points during the H-mode puff. Plasma fuels to death at ~1.5s Next shot: 5.4T, 0.6MA, back to default RF program. |
| Jun 24 2005 12:30:43:843PM | 1050624015 | Jerry Hughes | 5.4T, 0.6MA. Good shot. 3 H-modes.
Next shot: Long RF pulse, with NINJA puff enabled. |
| Jun 24 2005 12:46:59:643PM | 1050624016 | Jerry Hughes | 5.4T, 0.6MA. RF is good. A bump in radiated power occurs at ~0.9s, dropping
edge Te. NINJA seems to come in shortly after 1s, H-mode dies. Disruption shortly thereafter. Next shot: Bt-->6.2T, no puff. RF back to staircase. |
| Jun 24 2005 01:02:37:270PM | 1050624017 | Jerry Hughes | 6.2T, 0.6MA. RF is good. 3 good L-H transitions. QCM visible on PCI.
Some considerable bursts in Prad. Next shot: Ip-->0.9MA, nl-->0.9e20 |
| Jun 24 2005 01:16:50:753PM | 1050624018 | Jerry Hughes | 6.2T, 0.9MA. RF is good. 3 H-modes, a bit radiative.
QC mode is all broken up in the 2nd H-mode. Next shot: Bt-->5.4 |
| Jun 24 2005 01:26:51:630PM | 1050624019 | Jerry Hughes | 5.4T, 0.9MA. 3 H-modes, increasingly radiative.
Next shot: long RF pulse, with puff at 1s. |
| Jun 24 2005 01:45:30:300PM | 1050624020 | Jerry Hughes | 5.4T, 0.9MA. Good shot, with long RF pulse, puff at 1s. nl04 rises after 1s,
H-mode stays intact, just like in our gas-puffing experiment of 2002. n_e pedestal height doesn't change much during puff. Next shot: 5.4T, 1.2MA, nl-->1.2e20, RF staircase. |
| Jun 24 2005 02:00:53:350PM | 1050624021 | Jerry Hughes | 5.4T, 1.2MA. Good shot, but Ip flattop is a little short. Asking Joe to push the
current rise somewhat. 3 H-modes, Next shot: Repeat. |
| Jun 24 2005 02:07:02:583PM | 1050624022 | Jerry Hughes | 5.4T, 1.2MA. Longer flattop. Multiple H-modes, traces of QCM.
RF is very clean, but there are injections. Very dense pedestal. Next shot: Long pulse RF, No puff |
| Jun 24 2005 02:25:06:177PM | 1050624023 | Jerry Hughes | 5.4T, 1.2MA. Getting very radiative. Lose H-mode briefly at 1.03s. RF is fairly
good. ETS data are good. Next shot: Have Kenny add NINJA puff, at roughly 0.9s. |
| Jun 24 2005 02:26:28:130PM | 1050624024 | Jerry Hughes | No plasma.
Next shot: Retry. |
| Jun 24 2005 02:47:51:410PM | 1050624025 | Jerry Hughes | 5.4T, 1.2MA. This is a good shot. 2pi foil is climbing until 0.9s, when NINJA
starts flowing in D2. Edge Te drops, Prad drops, and the H-mode is sustained until 1.32s. QCM is there throughout. n_e,ped roughly constant. T_e,ped suppressed. Next shot: Bt-->6.2T, RF staircase. |
| Jun 24 2005 02:51:09:957PM | 1050624026 | Jerry Hughes | No plasma
Next shot: Retry |
| Jun 24 2005 03:13:15:520PM | 1050624027 | Jerry Hughes | 6.2T, 1.2MA. Good shot, with steady RF. Too much radiation in 1st H-mode, but the
last two are reasonable. QCM can be seen. Next shot: Ip-->1.5MA, nl-->1.5e20 |
| Jun 24 2005 03:28:40:830PM | 1050624028 | Jerry Hughes | 6.2T, 1.5MA. Some short H-modes early, and longer one in rampdown.
Next shot: same shot, long RF pulse at 3MW. |
| Jun 24 2005 03:39:21:113PM | 1050624029 | Jerry Hughes | 6.2T, 1.5MA. Two H-modes in flattop; first one lost when Prad surpasses 4MW.
n_e,ped~5e20. Max Wp of 192kJ Next shot: same shot |
| Jun 24 2005 04:04:13:770PM | 1050624030 | Jerry Hughes | 6.2T, 1.5MA. Couple of short H-modes, then disruption. Seems to be due to injection.
Next shot: retry |
| Jun 24 2005 04:10:58:643PM | 1050624031 | Jerry Hughes | 6.2T, 1.5MA. ELM-free H-modes, with high Prad. Not much QCM evident on PCI.
Next shot: Bt-->5.4T |
| Jun 24 2005 04:28:02:380PM | 1050624032 | Jerry Hughes | 5.4T, 1.5MA. Many ELM-free H-modes. Very high Prad.
Plasma appears starved for density. Next shot: Repeat, with NINJA puff at 1s |
| Jun 24 2005 04:44:23:957PM | 1050624033 | Jerry Hughes | 5.4T, 1.5MA. ~3MW. NINJA puff at 1s. Nice effect on radiated power. Basically end up with a steady EDA (with poor confinement).
Next shot: Ip-->1.8MA. Delay RF, and keep puff. |
| Jun 27 2005 12:32:27:977PM | 1050624033 | Jerry Hughes | Density rise from 0.665--0.709s does not appear to be an H-mode. It is coincident with the plasma briefly going inner wall limited. |
| Jun 24 2005 04:53:14:143PM | 1050624034 | Jerry Hughes | No plasma.
Next shot: retry. NINJA is being pumped to 20psi. |
| Physics Operator Comments | |||
| Jun 24 2005 09:10:20:360AM | 1050624001 | Joseph Snipes | Copied shot 1050428027. Then copied segment 1 from 1050622010. Good shot. |
| Jun 24 2005 09:38:44:170AM | 1050624002 | Joseph Snipes | Shot 2: Repeat. Fizzle! Closing gate valve to the pump after the shot for 300 s for all shots until further notice. |
| Jun 24 2005 09:37:04:360AM | 1050624003 | Joseph Snipes | Shot 3: Reduced Ar puff from 100 ms to 40 ms duration. Reduced prepuff by 2 ms
to 15 ms duration. Good shot. |
| Jun 24 2005 09:50:12:763AM | 1050624004 | Joseph Snipes | Shot 4: Raised Ip to 1.2 MA and nl04 to 1.2 x 10^20 m^-2. Dud. |
| Jun 24 2005 10:03:19:013AM | 1050624005 | Joseph Snipes | Shot 5: Raised prepuff by 3 ms to 18 ms duration. Good shot. |
| Jun 24 2005 10:16:34:500AM | 1050624006 | Joseph Snipes | Shot 6: Ar gas valve enabled so the previous changes in the Ar puff had no effect since the valve was disabled from the start of the run. Dud! |
| Jun 24 2005 10:35:03:780AM | 1050624007 | Joseph Snipes | Shot 7: Increased prepuff by 2 ms to 20 ms duration. Lowered nl04 to 9 x 10^19 m^-2. Good shot. |
| Jun 24 2005 10:41:21:827AM | 1050624008 | Joseph Snipes | Shot 8: Increased prepuff by 2 ms to 22 ms duration. Reduced Ip to 0.9 MA and reduced nl04 to 7 x 10^19 m^-2. Good shot. |
| Jun 24 2005 10:54:16:093AM | 1050624009 | Joseph Snipes | Shot 9: Reduced Ip to 0.6 MA and nl04 to 6 x 10^19 m^-2. Good shot. |
| Jun 24 2005 11:17:23:920AM | 1050624010 | Joseph Snipes | Shot 10: Reduced Ip to 0.4 MA. Turned on Ip gain in segment 1 to a value of 2
from 0.05 s and adjusted the requested Ip to 0.38 MA at 0.1 s. Good shot though the startup nearly didn't make it. |
| Jun 24 2005 11:23:09:687AM | 1050624011 | Joseph Snipes | Shot 11: Increased Ar puff by 10 ms to 50 ms duration. Good shot. |
| Jun 24 2005 11:44:48:407AM | 1050624012 | Joseph Snipes | Shot 12: Increased TF current to 150 kA. Turned off A-coils at this low current.
Good shot. |
| Jun 24 2005 11:57:57:937AM | 1050624013 | Joseph Snipes | Shot 13: Repeat. Good shot. |
| Jun 24 2005 12:10:17:657PM | 1050624014 | Joseph Snipes | Shot 14: Repeat with NINJA D2 gas puff at 1 s. Good shot. Disrupted at 1.5 s. |
| Jun 24 2005 12:21:48:890PM | 1050624015 | Joseph Snipes | Shot 15: Raised Ip to 0.6 MA and nl04 to 6 x 10^19 m^-2. Good shot. |
| Jun 24 2005 12:38:43:820PM | 1050624016 | Joseph Snipes | Shot 16: Repeat with NINJA puff. Disrupted at 1.07 s. |
| Jun 24 2005 12:52:32:540PM | 1050624017 | Joseph Snipes | Shot 17: Raised TF current to 172 kA to reach 6.2 T. NINJA turned off. Good shot. |
| Jun 24 2005 01:10:03:537PM | 1050624018 | Joseph Snipes | Shot 18: Copied shot 1050624008 at 0.9 MA and raised TF current to 173 kA and nl04 to 9 x 10^19 m^-2. Turned A-coils back on. Good shot. |
| Jun 24 2005 01:20:54:147PM | 1050624019 | Joseph Snipes | Shot 19: Lowered TF current to 150 kA to return to 5.4 T. Good shot. |
| Jun 24 2005 01:45:44:707PM | 1050624021 | Joseph Snipes | Shot 21: Raised Ip to 1.2 MA and nl04 to 1.2 x 10^20 m^-2. Good shot. |
| Jun 24 2005 02:12:22:207PM | 1050624022 | Joseph Snipes | Shot 22: Extended Ip flattop from 0.5 to 1.4 s. Good shot. |
| Jun 24 2005 02:12:40:927PM | 1050624023 | Joseph Snipes | Shot 23: Repeat. Good shot. |
| Jun 24 2005 02:26:42:800PM | 1050624024 | Joseph Snipes | Shot 24: Repeat with NINJA puff entering the plasma at 0.9 s. Fizzle! The DNB is no longer enabled and so it is no longer pumping on the chamber. |
| Jun 24 2005 02:44:01:067PM | 1050624025 | Joseph Snipes | Shot 25: Reduced prepuff by 4 ms to 18 ms duration. Good shot. Disrupted at 1.7 s. NINJA puffing really brings Prad down during the H-mode by cooling the edge. |
| Jun 24 2005 02:51:44:473PM | 1050624026 | Joseph Snipes | Shot 26: Increased TF current to 173 kA to go to 6.2 T. Reduced prepuff to 17 ms.
Fizzle! |
| Jun 24 2005 03:06:07:707PM | 1050624027 | Joseph Snipes | Shot 27: Lowered prepuff by 2 ms to 15 ms duration. Good shot. |
| Jun 24 2005 03:24:47:113PM | 1050624028 | Joseph Snipes | Shot 28: Increased prepuff by 1 ms to 16 ms duration. Raised Ip to 1.5 MA from 0.675 s to 1.2 s. Raised nl04 to 1.5 x 10^20 m^-2. Good shot. |
| Jun 24 2005 04:01:52:003PM | 1050624030 | Joseph Snipes | Shot 30: Repeat. Disrupted at 0.82 s at 1.5 MA. Halo current warning with
I_halo*Bt > 1500 cats. |
| Jun 24 2005 04:06:55:503PM | 1050624031 | Joseph Snipes | Shot 31: Repeat. Good shot. Many radiative H-modes. Plasma ramped nearly all the way down. |
| Jun 24 2005 04:19:16:457PM | 1050624032 | Joseph Snipes | Shot 32: TF current reduced to 150 kA for 5.4 T, which should bring q95 down to 2.7. Good shot. |
| Jun 24 2005 04:34:07:520PM | 1050624033 | Joseph Snipes | Shot 33: Repeat with NINJA D2 puffing. Good shot. |
| Jun 24 2005 04:45:23:130PM | 1050624034 | Joseph Snipes | Shot 34: Raised Ip to 1.8 MA and TF current to 173 kA for 6.2 T. Fizzle! |
| Jun 24 2005 05:10:06:783PM | 1050624035 | Joseph Snipes | Shot 35: Reduced Br0 by 0.5 mT to -0.5 mT. Disrupted at 0.86 s at 1.6 MA. Plasma is pushed up against the outboard limiter for some unknown reason. Current limit on EF3 is set to 12 kA, but it appears to actually limit at about 10.5 kA and that loses control of the plasma shape after about 0.68 s. The EF3 current limit needs to be set to 15 kA to run such a high plasma current. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:08:33:000AM | Plasma | Ok | |
| 2 | 09:22:52:077AM | Plasma | Ok | |
| 3 | 09:35:41:280AM | Plasma | Ok | |
| 4 | 09:48:49:670AM | Plasma | Ok | |
| 5 | 10:02:01:077AM | Plasma | Ok | |
| 6 | 10:14:33:657AM | Plasma | Ok | |
| 7 | 10:27:21:843AM | Plasma | Ok | |
| 8 | 10:40:03:483AM | Plasma | Ok | |
| 9 | 10:52:33:437AM | Plasma | Ok | |
| 10 | 11:07:57:123AM | Plasma | Ok | |
| 11 | 11:20:40:670AM | Plasma | Ok | |
| 12 | 11:41:29:640AM | Plasma | Ok | |
| 13 | 11:53:48:217AM | Plasma | Ok | |
| 14 | 12:07:00:373PM | Plasma | Ok | |
| 15 | 12:19:57:890PM | Plasma | Ok | |
| 16 | 12:36:45:763PM | Plasma | Ok | |
| 17 | 12:51:09:320PM | Plasma | Ok | |
| 18 | 01:04:57:537PM | Plasma | Ok | |
| 19 | 01:17:21:770PM | Plasma | Ok | |
| 20 | 01:31:25:397PM | Plasma | Ok | |
| 21 | 01:44:15:863PM | Plasma | Ok | |
| 22 | 01:57:10:550PM | Plasma | Ok | |
| 23 | 02:10:31:770PM | Plasma | Ok | |
| 24 | 02:23:25:770PM | Plasma | Ok | |
| 25 | 02:36:10:410PM | Plasma | Ok | |
| 26 | 02:48:55:457PM | Plasma | Ok | |
| 27 | 03:01:41:350PM | Plasma | Ok | |
| 28 | 03:15:08:443PM | Plasma | Ok | |
| 29 | 03:29:31:067PM | Plasma | Ok | |
| 30 | 03:45:18:583PM | Plasma | Ok | |
| 31 | 04:02:59:410PM | Plasma | Ok | |
| 32 | 04:15:56:193PM | Plasma | Ok | |
| 33 | 04:29:23:083PM | Plasma | Ok | |
| 34 | 04:43:32:130PM | Plasma | Ok | |
| 35 | 04:56:07:833PM | Plasma | Ok | |