| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | D Jablonski |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Vinny Bertolino |
| Engineering Operator Run Comment |
| granetz |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:14:867PM |
| Author: To Be Determined |
| Run 9512019, as set out in miniproposal 128, 'Nitrogen Injection Plume Study', was a resounding success, yielding a veritable plethora of interesting results. N-II, N-III, and He-II plumes over a range of plasma densities were observed and recorded during Nitrogen and Helium injection at the inner-wall midplane. Additionally, bright N-II plumes were observed during Nitrogen injection on the outer divertor, inner divertor, and outer A-B limiter. In all cases, the plumes were observed to flow in the expected direction (towards the strike point). No shots were attempted with an upper x-point, primarily because little success has been had with such shots recently. The Nitrogen puffs were, unfortunately, observed to be perturbative (ideally these injections should be 'trace'), inducing detachment in the outer divertor even during low density shots. The Helium puffs were also perturbative; being as such a large flow rate was needed to observe He-II light, the Helium puffs were a not insubstantial fueling source for the central plasma. While the N-II and He-II emissions were bright enough to observe well, the N-III emission was disappointingly faint. A N-I line (868 nm) was found to be substantially bright, such that a filter at that wavelength will be ordered to observe N-I emission plumes in the future. There was great success in getting Fast Scanning Probe profiles. Below is a shot by shot quick account of the run. The 'Plenum' column indicates the gas and the pressure in torr in the NINJA plenum. The 'Cap' column indicates the capillary(ies) puffed through. The 'Trig' column gives the NINJA valve trigger time and pulse length. The comments column consists primarily of comments on the plume quality, written in a special code. The 's' or 't' after the shot number indicates whether it was the side or top Culham Camera which was hooked up to the PC optical frame-grabber. Shot X-P Plenum Cap Trig Filts nebar Comments ==== === ====== === ==== ===== ===== ======== 01s Dwn N2/234 -- -- H-A 1.8e20 See H-A on CC's fine 02s Dwn N2/234 16-001 .4/.1 N-II 1.2e20 Disruption at .7 03s Dwn N2/234 16-001 .45/.1 N-II 1.5e20 Dis at .75,see Faint Plume 04s Dwn N2/308 16-001 .4/.1 N-II 1.5e20 See decent Plume 05s Dwn N2/308 16-001 .4/.1 N-III -- Dies about .3 06s Dwn N2/308 16-001 .4/.1 N-III -- Dies about .3 07s Dwn N2/308 16-001 .4/.1 N-III -- Fiz 08s Dwn N2/306 16-001 .4/.1 N-III 1.5e20 Very Faint Plume 09s Dwn N2/306 16-001 .4/.1 N-II 2.2e20 Nice Plume 10s Dwn N2/306 16-001 .4/.1 N-II -- Dies about .3 11s Dwn N2/306 16-001 .4/.1 N-II 2.5e20 Nice Plume,v.Faint on Top Vw. 12s Dwn N2/305 16-001 .4/.1 N-II 2.6e20 Side no record,top same as 12 13s Dwn N2/305 16-001 .4/.1 N-III 2.8e20 Cannot see 14s Dwn -- -- -- N-III 2.8e20 Dis 'bout 1.2, fine base shot 15s Dwn He/466 16-001 .4/.1 He-II 2.8e20 Faintly on side,Brt on top 16s Dwn He/606 16-001 .4/.1 He-II -- No Plasma 17s Dwn He/606 16-001 .4/.1 He-II 2.9e20 Fine Plume,Brt on top 18s Dwn He/605 16-001 .4/.1 He-I -- No Plasma 19s Dwn He/605 16-001 .4/.1 He-I 2.9e20 Nice big dot,Same on Top 20s Dwn He/605 16-001 .4/.1 He-II 1.6e20 Nice Plume,Brt on top 21s Dwn He/604 16-001 .4/.1 He-I 1.7e20 Nice big dot 22t Dwn N2/334 33-001 .4/.1 N-II 1.6e20 Blah Blob seen through top 23t Dwn N2/334 31-086 .4/.1 N-II 1.6e20 Beautiful Pluming/Cor Dir 24t Dwn N2/334 31-086 .4/.1 N-II 1.5e20 Nice Plume, Dis .7 25t Dwn N2/334 20-001 .4/.1 N-II 1.5e20 Nice Plume, Dis .7 26t Dwn N2/334 26-019 .45/.1 N-II 1.3e20 See Crap 27t Dwn N2/332 16-001 .4/.1 N-II 1.5e20 Blob on Top,Nice on side 28t Dwn N2/332 33-001 .4/.1 N-II 2.1e20 Blob,hint of direction,dis .7 29t Dwn N2/331 31-086 .4/.1 N-II 2.4e20 Nice, Character changes 30t Dwn N2/330 20-001 .4/.1 N-II 2.4e20 Fairly nice 31t Dwn N2/330 20-001 .4/.1 N-II 0.8e20 Dis .7, Decent Plume 32t Dwn N2/330 -- -- N-II -- Dis .45 33t Dwn N2/330 31-086 .4/.1 N-II 1.0e20 Beaut 1 Frame, Disrupt 34t Dwn N2/329 33-001 .4/.1 N-II 1.2e20 Decent Blob 35s Dwn N2/329 33-001 .4/.1 N-II 1.3e20 Nice on A-side,Blob on top 36s Dwn N2/329 16-001 .4/.1 N-II -- No Shot 37s Dwn N2/328 16-001 .4/.1 N-II 1.3e20 Okay Plume 38t Dwn N2/328 24-028 .4/.1 N-II -- Fizzle 39t Dwn N2/328 24-028 .4/.1 N-II Dis .6 40s Dwn He/573 16-001 .4/.1 He-I -- Dud 20-001 .4/.1 |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:55:677PM |
| Author: To Be Determined |
| Physics Operator's summary for run 951219 MP 128 -- Nitrogen Injection Plume Study SL: D. Jablonski PO: R. Granetz EO: V. Bertolino Today's run plan: Begin with fiducial shot. If necessary, adjust for desired 2 cm gaps and FSP compatibility. Puff in nitrogen from inboard midplane NINJA capillary. Do 3 different densities (nl_04=1.0, 1.5, 2.0e20 m-2). Vary puff location. Then puff in helium and repeat this program. As time permits, repeat program with upper x-point plasmas. Summary: Much of the planned program was accomplished, although we ran out of time before we could do any upper x-point plasmas. Nitrogen and helium were puffed from various locations at nl_04=0.8, 1.1, and 1.5e20 m-2, and good plume data were obtained. Misc Phys Op stuff: Some amount of gas-head work was required to obtain a discharge without hard x-rays. In my opinion, the nitrogen did seem to increase the probability of a flattop disruption. There were a few engineering problems today, with some blown fuses. Overall it was a typical run. Scorecard: 34 plasmas 3 fizzles 3 duds (all due to various power supplies not turning on) ---------- 40 total Run setup: Normal ECDC in deuterium. All power supply settings as for the last shot on Monday (951218034). Deuterium in K-side at 20 psi (used to be A-side), enabled for hybrid. Deuterium in B-top at 5 psi (puff pre-fill), enabled for hybrid. Argon in B-side-lower at 4-5 psi, but not enabled. NINJA plenum filled with nitrogen at 5 psi. No RF, no pellets Enable the ECE, VUV, Moly monitor, PCX, and TCX valves PCS copied from fiducial shot 951218034 for segments 1 & 2, and shot 951213025 for segment 3, which was a recent, successful upper x-point discharge Detailed shot log: Shot 01 -- Fiducial shot. Good shot. (No ICRF). Inner gap=15 mm, outer gap=17 mm. FSP control is not enabled yet. Next shot: Increase CLEARIN by 3 mm. Tweak FSP demand to try for zero error, but don't turn on any gain yet. FSP control will be needed when we change to other densities. Also turn on nitrogen puff from NINJA inboard midplane capillary. Shot 02 -- Plasma, disrupted at 0.74 s. Density was lower than previous shot. Lots of moly x-rays early in shot. Inner gap=22 mm and outer gap=25 mm. This equilibrium was too different from the last one to make a good comparison on FSP control. Next shot: reduce CLEARIN by 2 mm. Shot 03 -- Plasma, disrupted at 0.77 s. Density is low again, but almost made it to the demand value. There were also some hard x-rays. Inner gap=20 mm, outer gap=25 mm. Brian reports that the divertor looks like it's detaching, even at this low density. It could be the nitrogen puffing. Next shot: tweak up early gas puff, and reduce CLEARIN by another 1 mm. Shot 04 -- Plasma, made it to t=1.22 s. Density is still a little low (nl_04=0.9e20 m-2). Almost no hard x-rays. There's still an error on FSP wire. Next shot: same shot, different nitrogen filter. Increase FSP demand some more (still no gain though). Raise density a little as well. Shot 05 -- Plasma, but only lasted until 0.25 s. I think a chunk of molybdenum fell in about 3 ms prior to the disruption. Next shot: repeat with no changes. Shot 06 -- Plasma, another early disruption. Density was even lower than on previous shot. Next shot: increase pre-pulse puff duration by 1 ms, and increase early pulse-gas-3 voltage in segment 2. Shot 07 -- Fizzle. PF breaker pulled out. Next shot: decrease pre-pulse puff duration by 1 ms. Shot 08 -- Plasma. Lasted until 1.21 s. Some hard x-rays. FSP error is very close to zero. Next shot: increase density to nl_04=1.5e20 m-2. Also tweak the early pulse gas voltage. Also turn on active FSP control by setting feedback gain to 4 at t=0.6 s. Shot 09 -- Plasma. Lasted until 1.21 s. nl_04 got to 1.3e20 m-2. Next shot: increase density to nl_04=2.0e20 m-2. Try to help the density get there by also programming 20 volts on pulse-gas-4 from t=0.5 to 0.9 s. Also reduce ZXL gain from 8 to 4 during the time that FSP gain is on. Shot 10 -- Plasma, disrupted at 0.30 s. Next shot: tweak up early pulse-gas-3 voltage. Shot 11 -- Plasma. Lasted until 1.2 s. Density only made it to nl_04=1.5e20. Next shot: increase pulse-gas-4 voltage from 20 to 60 volts from t=0.5 to 0.9 s. Also decrease FSP demand by 5 mm (as requested by Brian). Shot 12 -- Plasma. Nearly the same density as the previous shot, even with the increase in pulse-gas-4 voltage. Next shot: increase FSP gain and reduce ZXL gain. Also increase nl_04 demand from t=0.2 to 0.4 s. Shot 13 -- Plasma. Next shot: no nitrogen puff (background shot). Also tweaked FSP demand. Shot 14 -- Plasma. Good background shot. FSP position is near perfect. Next shot: switch to helium puffing from the NINJA inner midplane. No change in density. Shot 15 -- Plasma. Helium plume seen, but not very bright. Next shot: repeat with higher helium plenum pressure. Shot 16 -- Dud. No power supplies. Engineering fault; magnet resistance fault. Shot 17 -- Plasma. Good plume data. Next shot: repeat with different helium filter Shot 18 -- Dud. No EF3. Next shot: try again. Shot 19 -- Plasma. Next shot: Reduce density to nl_04=1.0e20 m-2. (Turn off the pulse-gas-4 voltage programming as well.) Continue helium puffing. Shot 20 -- Plasma. Got nl_04=1.1e20 m-2. Plasma ramped nearly all the way down (because the density was lower). Helium puffing with inboard midplane NINJA capillary. Next shot: repeat with different helium filter Shot 21 -- Plasma. Same as last shot. It has just been noticed that the PLC plenum screen mistakenly indicated deuterium, rather than helium, in the NINJA plenum. Spectroscopic data verifies that we have indeed been puffing helium though. Next shot: switch back to nitrogen puffing and repeat same shot. Shot 22 -- Plasma. Good shot. Next shot: repeat, except puff nitrogen through an outer divertor NINJA capillary. Shot 23 -- Plasma. Great plume. Next shot: repeat, except change the nitrogen filter. Shot 24 -- Plasma. Disrupted at 0.67 s. Next shot: repeat, except puff nitrogen through lower inboard NINJA capillary. Shot 25 -- Plasma. Disrupted at 0.69 s. Next shot: repeat, except puff nitrogen through private flux zone NINJA capillary. Also, the puff will be delayed 50 ms. Shot 26 -- Plasma. Good shot. Density was very constant. No detachment, no plume seen. Was there really a nitrogen puff? Yes, there was. Next shot: repeat, except puff nitrogen through inboard midplane capillary, with timing set back to normal (earlier by 50 ms). Shot 27 -- Plasma. Good shot. Next shot: raise density to nl_04=1.5e20 m-2. Puff nitrogen from outboard limiter NINJA capillary. (Also re-enable extra gas using pulse-gas-4 voltage programming.) Shot 28 -- Plasma. Disrupted at 0.74 s. I think the nitrogen puffing may be causing these disruptions. Next shot: repeat, except puff nitrogen from outer divertor shelf. Also, a tweak was made to the early density demand. Shot 29 -- Plasma. Good plume. Next shot: repeat, except puff nitrogen from lower inboard capillary Shot 30 -- Plasma. Next shot: lower density to nl_04=0.5e20 m-2 (and remove pulse-gas-4 voltage). Puff nitrogen from lower inboard capillary. Shot 31 -- Plasma, disrupted at 0.69 s. Still got acceptable plume data. Next shot: repeat, with no impurity puffing. Shot 32 -- Plasma, disrupted at 0.41 s. Next shot: raise density a little to nl_04=0.7e20 m-2. Turn on NINJA nitrogen puff also. Shot 33 -- Plasma, disrupted at 0.57 s. Great plume, but only got one frame. Next shot: raise density to nl_04=0.8e20 m-2. Puff nitrogen from outboard limiter capillary. Shot 34 -- Plasma. Made it all the way down. nl_04=0.8e20 m-2. Next shot: repeat with nitrogen puff at inboard midplane. Shot 35 -- Plasma. Another nice one. However, puff was from outboard limiter, which was a mistake. Next shot: repeat with nitrogen puff at inboard midplane. Shot 36 -- Dud. No EF4. Next shot: try again Shot 37 -- Plasma, disrupted at 0.74 s. Still got plume data. Next shot: repeat with nitrogen puff from private flux zone. Shot 38 -- Fizzle. Next shot: try again. Shot 39 -- Plasma, disrupted at 0.56 s, before any plume data. Next shot: puff helium from both inboard midplane and lower inboard capillaries. Raise density to nl_04=1.0e20 m-2. Shot 40 -- Fizzle. Chalk it up to disruption recovery. End of run |
| Session Leader Comments |
| Physics Operator Comments | |||
| Dec 18 1995 06:05:16:580PM | 951219001 | Robert Granetz | MP 128 -- Nitrogen Injection Plume Study
(mostly fiducial plasmas, and some upper x-point plasmas) SL: D. Jablonski PO: R. Granetz EO: V. Bertolino Today's run plan: Begin with fiducial shot. If necessary, adjust for desired 2 cm gaps and FSP compatibility. Puff in nitrogen from inboard midplane NINJA capillary. Do 3 different densities (nl_04=1.0, 1.5, 2.0e20 m-2). Vary puff location. Then puff in helium and repeat this program. As time permits, repeat program with upper x-point plasmas. |
| Dec 18 1995 06:05:55:400PM | 951219001 | Robert Granetz | Run setup: Normal ECDC in deuterium.
All power supply settings as for the last shot on Monday (951218034). Deuterium in K-side at 20 psi (used to be A-side), enabled for hybrid. Deuterium in B-top at 5 psi (puff pre-fill), enabled for hybrid. Argon in B-side-lower at 4-5 psi, but not enabled. NINJA plenum filled with nitrogen at 5 psi. No RF, no pellets Enable the ECE, VUV, Moly monitor, PCX, and TCX valves PCS copied from fiducial shot 951218034 for segments 1 & 2, and shot 951213025 for segment 3, which was a recent, successful upper x-point discharge |
| Dec 19 1995 09:05:57:570AM | 951219001 | Robert Granetz | Shot 01 -- Fiducial shot. Good shot. (No ICRF). Inner gap=15 mm, outer
gap=17 mm. FSP control is not enabled yet. Next shot: Increase CLEARIN by 3 mm. Tweak FSP demand to try for zero error, but don't turn on any gain yet. FSP control will be needed when we change to other densities. |
| Dec 19 1995 09:16:11:820AM | 951219002 | Robert Granetz | Shot 02 -- Plasma, disrupted at 0.74 s. Density was lower than previous
shot. Lots of moly x-rays early in shot. Inner gap=22 mm and outer gap=25 mm. This equilibrium was too different from the last one to make a good comparison on FSP control. Next shot: reduce CLEARIN by 2 mm. |
| Dec 19 1995 09:28:48:280AM | 951219003 | Robert Granetz | Shot 03 -- Plasma, disrupted at 0.77 s. Density is low again, but almost
made it to the demand value. There were also some hard x-rays. Inner gap=20 mm, outer gap=25 mm. Brian reports that the divertor looks like it's detaching, even at this low density. It could be the nitrogen puffing. Next shot: tweak up early gas puff, and reduce CLEARIN by another 1 mm. |
| Dec 19 1995 09:42:46:520AM | 951219004 | Robert Granetz | Shot 04 -- Plasma, made it to t=1.22 s. Density is still a little
low (nl_04=0.9e20 m-2). Almost no hard x-rays. There's still an error on FSP wire. Next shot: same shot, different nitrogen filter. Increase FSP demand some more (still no gain though). Raise density a little as well. |
| Dec 19 1995 09:51:02:580AM | 951219005 | Robert Granetz | Shot 05 -- Plasma, but only lasted until 0.25 s. I think a chunk of molybdenum
fell in about 3 ms prior to the disruption. Next shot: repeat with no changes. |
| Dec 19 1995 10:04:19:720AM | 951219006 | Robert Granetz | Shot 06 -- Plasma, another early disruption. Density was even lower than
on previous shot. Next shot: increase pre-pulse puff duration by 1 ms, and increase early pulse-gas-3 voltage in segment 2. |
| Dec 19 1995 10:10:33:570AM | 951219007 | Robert Granetz | Shot 07 -- Fizzle. PF breaker pulled out.
Next shot: decrease pre-pulse puff duration by 1 ms. |
| Dec 19 1995 10:23:33:640AM | 951219008 | Robert Granetz | Shot 08 -- Plasma. Lasted until 1.21 s. Some hard x-rays. FSP error is
very close to zero. Next shot: increase density to nl_04=1.5e20 m-2. Also tweak the early pulse gas voltage. Also turn on active FSP control by setting feedback gain to 4 at t=0.6 s. |
| Dec 19 1995 10:37:40:390AM | 951219009 | Robert Granetz | Shot 09 -- Plasma. Lasted until 1.21 s. nl_04 got to 1.3e20 m-2.
Next shot: increase density to nl_04=2.0e20 m-2. Try to help the density get there by also programming 20 volts on pulse-gas-4 from t=0.5 to 0.9 s. Also reduce ZXL gain from 8 to 4 during the time that FSP gain is on. |
| Dec 19 1995 10:46:43:340AM | 951219010 | Robert Granetz | Shot 10 -- Plasma, disrupted at 0.30 s.
Next shot: tweak up early pulse-gas-3 voltage. |
| Dec 19 1995 10:59:45:010AM | 951219011 | Robert Granetz | Shot 11 -- Plasma. Lasted until 1.2 s. Density only made it to nl_04=1.5e20.
Next shot: increase pulse-gas-4 voltage from 20 to 60 volts from t=0.5 to 0.9 s. Also decrease FSP demand by 5 mm (as requested by Brian). |
| Dec 19 1995 11:15:24:730AM | 951219012 | Robert Granetz | Shot 12 -- Plasma. Nearly the same density as the previous shot, even with
the increase in pulse-gas-4 voltage. Next shot: increase FSP gain and reduce ZXL gain. Also increase nl_04 demand from t=0.2 to 0.4 s. |
| Dec 19 1995 11:22:17:680AM | 951219013 | Robert Granetz | Shot 13 -- Plasma.
Next shot: no nitrogen puff (background shot) |
| Dec 19 1995 11:38:13:110AM | 951219014 | Robert Granetz | Shot 14 -- Plasma. Good background shot. FSP position is near perfect.
Next shot: switch to helium puffing from the NINJA inner midplane. No change in density. |
| Dec 19 1995 11:46:18:610AM | 951219015 | Robert Granetz | Shot 15 -- Plasma. Helium plume seen, but not very bright.
Next shot: repeat with higher helium plenum pressure. |
| Dec 19 1995 11:58:05:470AM | 951219016 | Robert Granetz | Shot 16 -- No pulse. Engineering fault; magnet resistance fault.
|
| Dec 19 1995 12:08:42:060PM | 951219017 | Robert Granetz | Shot 17 -- Plasma. Good plume data.
Next shot: repeat with different helium filter |
| Dec 19 1995 12:15:18:200PM | 951219018 | Robert Granetz | Shot 18 -- Dud. No EF3.
Next shot: try again. |
| Dec 19 1995 12:28:55:860PM | 951219019 | Robert Granetz | Shot 19 -- Plasma.
Next shot: Reduce density to nl_04=1.0e20 m-2. (Turn off the pulse-gas-4 voltage programming as well.) Continue helium puffing. |
| Dec 19 1995 12:37:22:890PM | 951219020 | Robert Granetz | Shot 20 -- Plasma. Got nl_04=1.1e20 m-2. Plasma ramped nearly all the way
down (because the density was lower). Helium puffing with inboard midplane NINJA capillary. Next shot: repeat with different helium filter |
| Dec 19 1995 12:57:53:350PM | 951219021 | Robert Granetz | Shot 21 -- Plasma. Same as last shot. It has just been noticed that the
PLC plenum screen mistakenly indicated deuterium, rather than helium, in the NINJA plenum. Spectroscopic data verifies that we have indeed been puffing helium though. Next shot: switch back to nitrogen puffing and repeat same shot. |
| Dec 19 1995 01:08:03:290PM | 951219022 | Robert Granetz | Shot 22 -- Plasma. Good shot.
Next shot: repeat, except puff nitrogen through an outer divertor NINJA capillary. |
| Dec 19 1995 01:26:51:460PM | 951219023 | Robert Granetz | Shot 23 -- Plasma. Great plume.
Next shot: repeat, except change the nitrogen filter. |
| Dec 19 1995 01:36:47:990PM | 951219024 | Robert Granetz | Shot 24 -- Plasma. Disrupted at 0.67 s.
Next shot: repeat, except puff nitrogen through lower inboard NINJA capillary. |
| Dec 19 1995 01:50:43:790PM | 951219025 | Robert Granetz | Shot 25 -- Plasma. Disrupted at 0.69 s.
Next shot: repeat, except puff nitrogen through private flux zone NINJA capillary. Also, the puff will be delayed 50 ms. |
| Dec 19 1995 02:01:29:360PM | 951219026 | Robert Granetz | Shot 26 -- Plasma. Good shot. Density was very constant. No detachment,
no plume seen. Was there really a nitrogen puff? Yes, there was. Next shot: repeat, except puff nitrogen through inboard midplane capillary, with timing set back to normal (earlier by 50 ms). |
| Dec 19 1995 02:07:07:330PM | 951219027 | Robert Granetz | Shot 27 -- Plasma. Good shot.
Next shot: raise density to nl_04=1.5e20 m-2. Puff nitrogen from outboard limiter NINJA capillary. (Also re-enable extra gas using pulse-gas-4 voltage programming.) |
| Dec 19 1995 02:21:10:280PM | 951219028 | Robert Granetz | Shot 28 -- Plasma. Disrupted at 0.74 s. I think the nitrogen puffing may be
causing these disruptions. Next shot: repeat, except puff nitrogen from outer divertor shelf. |
| Dec 19 1995 02:39:08:070PM | 951219029 | Robert Granetz | Shot 29 -- Plasma. Good plume.
Next shot: repeat, except puff nitrogen from lower inboard capillary |
| Dec 19 1995 02:47:17:800PM | 951219030 | Robert Granetz | Shot 30 -- Plasma.
Next shot: lower density to nl_04=0.5e20 m-2 (and remove pulse-gas-4 voltage). Puff nitrogen from lower inboard capillary. |
| Dec 19 1995 02:58:36:640PM | 951219031 | Robert Granetz | Shot 31 -- Plasma, disrupted at 0.69 s. Still got acceptable plume data.
Next shot: repeat, with no impurity puffing. |
| Dec 19 1995 03:15:25:590PM | 951219032 | Robert Granetz | Shot 32 -- Plasma, disrupted at 0.41 s.
Next shot: raise density a little to nl_04=0.7e20 m-2. Turn on NINJA nitrogen puff also. |
| Dec 19 1995 03:25:01:350PM | 951219033 | Robert Granetz | Shot 33 -- Plasma, disrupted at 0.57 s. Great plume, but only got one frame.
Next shot: raise density to nl_04=0.8e20 m-2. Puff nitrogen from outboard limited capillary. |
| Dec 19 1995 03:32:14:540PM | 951219034 | Robert Granetz | Shot 34 -- Plasma. Made it all the way down. nl_04=0.8e20 m-2.
Next shot: repeat with nitrogen puff at inboard midplane. |
| Dec 19 1995 03:41:32:290PM | 951219035 | Robert Granetz | Shot 35 -- Plasma. Another nice one. However, puff was from outboard
limiter, which was a mistake. Next shot: repeat with nitrogen puff at inboard midplane. |
| Dec 19 1995 03:51:45:650PM | 951219036 | Robert Granetz | Shot 36 -- Dud. No EF4.
Next shot: try again |
| Dec 19 1995 04:09:32:240PM | 951219037 | Robert Granetz | Shot 37 -- Plasma, disrupted at 0.74 s. Still got plume data.
Next shot: repeat with nitrogen puff from private flux zone. |
| Dec 19 1995 04:36:52:850PM | 951219038 | Robert Granetz | Shot 38 -- Fizzle.
Next shot: try again. |
| Dec 19 1995 04:45:35:850PM | 951219039 | Robert Granetz | Shot 39 -- Plasma, disrupted at 0.56 s, before any plume data.
Next shot: puff helium from both inboard midplane and lower inboard capillaries. Raise density to nl_04=1.0e20 m-2. |
| Dec 19 1995 05:08:50:090PM | 951219040 | Robert Granetz | Shot 40 -- Fizzle. Chalk it up to disruption recovery.
End of run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 06:05:12:610PM | Plasma | Ok | |
| 2 | 09:05:24:580AM | Plasma | Ok | |
| 3 | 09:16:41:360AM | Plasma | Ok | |
| 4 | 09:28:37:200AM | Plasma | Ok | |
| 5 | 09:42:57:590AM | Plasma | Ok | |
| 6 | 09:53:21:680AM | Plasma | Ok | |
| 7 | 10:04:47:400AM | Plasma | Ok | |
| 8 | 10:13:45:870AM | Plasma | Ok | |
| 9 | 10:25:07:180AM | Plasma | Ok | |
| 10 | 10:37:26:140AM | Plasma | Ok | |
| 11 | 10:49:50:670AM | Plasma | Ok | |
| 12 | 11:03:20:320AM | Plasma | Ok | |
| 13 | 11:16:43:600AM | Plasma | Ok | |
| 14 | 11:29:45:180AM | Plasma | Ok | |
| 15 | 11:41:11:250AM | Plasma | Ok | |
| 16 | 11:54:56:310AM | Plasma | Bad | mag resist fault |
| 17 | 12:02:21:500PM | Plasma | Ok | |
| 18 | 12:12:57:020PM | Plasma | Bad | no ef3 |
| 19 | 12:22:09:380PM | Plasma | Ok | |
| 20 | 12:30:44:080PM | Plasma | Ok | |
| 21 | 12:50:45:110PM | Plasma | Ok | |
| 22 | 01:04:25:850PM | Plasma | Ok | |
| 23 | 01:16:35:760PM | Plasma | Ok | |
| 24 | 01:31:53:250PM | Plasma | Ok | |
| 25 | 01:44:05:830PM | Plasma | Ok | |
| 26 | 01:54:36:050PM | Plasma | Ok | |
| 27 | 02:02:25:340PM | Plasma | Ok | |
| 28 | 02:14:49:840PM | Plasma | Ok | |
| 29 | 02:33:44:220PM | Plasma | Ok | |
| 30 | 02:43:50:930PM | Plasma | Ok | |
| 31 | 02:53:19:300PM | Plasma | Ok | |
| 32 | 03:09:13:360PM | Plasma | Ok | |
| 33 | 03:18:08:710PM | Plasma | Ok | |
| 34 | 03:27:52:310PM | Plasma | Ok | |
| 35 | 03:35:02:490PM | Plasma | Ok | |
| 36 | 03:47:52:190PM | Plasma | Ok | |
| 37 | 04:04:35:820PM | Plasma | Bad | Fuse loss OH2 L |
| 38 | 04:30:40:000PM | Plasma | Ok | |
| 39 | 04:38:35:300PM | Plasma | Ok | |
| 40 | 04:55:19:980PM | Plasma | Ok | |