| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Jim Irby |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Gary Dekow |
| Engineering Operator Run Comment |
| z |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:14:850PM |
| Author: To Be Determined |
| Physics operator summary for run 1020618 (Tuesday): Session leader: R. Granetz/J. Irby Physics operator: J. Irby/R. Granetz Engineer in charge: G. Dekow Summary: Scorecard: plasmas fizzles duds tests aborted and/or screwed up by computer problems ---------- total ------------------------------------------------------------------------------- Engineering setup for Tuesday 18 June 2002 Session leader: R. Granetz/J. Irby Physics operator: J. Irby/R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 8:00 am. We may want ECDC in D2 between shots. Run begins at 09:00 and ends at 17:00. Power systems the same as for shot 1020607016. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Enable the following gate valves, assuming no vacuum problems: DNB ------------------------------------------------------------------------------- Run Plan: Lengthen plasma duration by controlling gas puffing and density. Start from 1020607016; a short 800 kA shot. We may want ECDC in D2 between shots. We would like to have the TCI working. We will probably also puff some argon for HIREX Ti (and Te) measurements. ------------------------------------------------------------------------------- Overnight ECDC in D2 was done. Hybrid coldstart done; no errors found Loaded PCS from shot 1020607016. ------------------------------------------------------------------------------- Shot 01 -- Test. Pre-fill pressure is rather low, even though the pulse is the same 29 ms as last week. Plenum pressure is a little low. It'll be brought up to 6 psi for the next shot. I've zeroed the NL_04 gain for all of segment 2, and I've set the pre-programmed voltage to be ~ -25 V for C-side valve (pulse gas 3). This is because we don't know how well the TCI will be working. Shot 02 -- Test. Pre-fill pressure looks good now. Shot 03 -- Plasma. Ip=0.73 MA. Disrupted at 0.43 s. TCI worked fine. NL_04=0.6-0.7e20 m-2 until 0.4 s, then the density starts to rise. Next shot: turn on nl_04 feedback (0.7e20 m-2), set pre-programmed voltage for C-side to 0 volts in segment 2. Also adjust Btor to be 5.3 T for the entire shot (was set at 4.8 T in segment 2 for some reason). Steve Wolfe is working on getting EFIT going. Shot 04 -- Dud. The F21 flux loop is having an offset problem. There was also a camac problem with magnetics traq_2 (mostly Bp data). Shot 05 -- Dud. Fields look reasonable, as does gas. F21 looks fine as well. Must just be dirt from shot 3. Steve and I have been looking at processed BP_14 and BP_15, and we think something is wrong with these signals, although they begin at, and return to zero. These signals use BP15_JK and BP16_JK. The corresponding signals on the BC and DE quadrants look much more reasonable. Between-shot ECDC is starting now. Shot 06 -- Fizzle. I think it was the 15 minutes of ECDC that got it back. Bz0 and Br0 dropped a tiny bit. ECDC in D2 between shots. Next shot: reduce pre-fill pulse length by 3 ms (29 -> 26 ms) Shot 07 -- Fizzle. Looks like it hit something. Fields look good (Br0 jumped back up to pre-shot_06 value without me doing anything.) Brian Labombard has just calibrated the F-side-ratiomatic signal and finds that it was reading 35% low until now. He has gone back and corrected all the shots from today. It's now showing 0.07 mtorr. Between-shot ECDC Next shot: no changes. Shot 08 -- Dud. Time to change the pre-fill. Between-shot ECDC Next shot: reduce pre-fill pulse by another 3 ms (26 -> 23 ms) Shot 09 -- Plasma. Disrupted at t=0.28 s, Ip=0.6 MA. nl_04=0.9e20 m-2. Carbon II burns out pretty well. Noticeable hesitation on current rise between t=10 and 20 ms. Bz0 was a little high around t=10 ms. Pre-fill=0.06 mtorr. Not clear what caused the disruption, although the 2pi bolo shows lots of spiky stuff. Between-shot ECDC Next shot: no changes Shot 10 -- Fizzle. Bz0 looks a bit high. Between-shot ECDC Next shot: reduce IC_EF4 by 10 amps. Shot 11 -- Fizzle. Between-shot ECDC Next shot: lower the pre-fill another 2 ms. Shot 12 -- Plasma. Ip=0.75 MA. Disrupted at t=0.61 s. H/D<=0.4. We have GPC Te data (1 keV ?). nl_04=1.0e20 m-2. Argon was definitely puffed. Between-shot ECDC Next shot: no changes Shot 13 -- Fizzle. Probably just dirt. No ECDC, per Jim Irby's request, just to see what happens. Next shot: no changes Shot 14 -- Plasma. Disrupted at 0.3 s. Most of these plasmas have been very resistive, with the current turning over prior to the disruption. Current rise still has a hesitation. No ECDC. Next shot: no changes Shot 15 -- Fizzle. Re-starting between-shot ECDC Next shot: no changes Shot 16 -- Fizzle. Bz0 has dropped a bit. Between-shot ECDC Next shot: increase IC_EF4 by 10 amps Shot 17 -- Aborted. Shot 18 -- Dud. Should have gone. Between-shot ECDC Next shot: no change Shot 19 -- Plasma. Disrupted at t=0.3 s. Resistive. There's still a hesitation during the early current rise. Between-shot ECDC Next shot: no change Shot 20 -- Fizzle. (strong fizzle). End of run. |
| Session Leader Comments | |||
| Jun 18 2002 10:50:46:787AM | 1020618003 | Jim Irby | Lots of impurities were generated during the shot. All masses up to mass 100 nicely represented on the RGA. MKS gauges indicate up to 80 mTorr of pressure after the shot. TCI gatevalves closed. Earl has H-to-D running. Starts low and ramps up to about 100% by the end of the shot |
| Jun 18 2002 11:15:33:687AM | 1020618005 | Jim Irby | Another DuD. Base pressure is rather high at 6 or 7 e-7 Torr. |
| Jun 18 2002 12:07:48:387PM | 1020618007 | Jim Irby | Pressure at shot 1.2e-6 Torr following ECDC |
| Physics Operator Comments | |||
| Jun 18 2002 08:30:29:413AM | Robert Granetz | Engineering setup for Tuesday 18 June 2002 Session leader: R. Granetz/J. Irby Physics operator: J. Irby/R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 8:00 am. We may want ECDC in D2 between shots. Run begins at 09:00 and ends at 17:00. Power systems the same as for shot 1020607016. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Enable the following gate valves, assuming no vacuum problems: DNB ------------------------------------------------------------------------------- Run Plan: Lengthen plasma duration by controlling gas puffing and density. Start from 1020607016; a short 800 kA shot. We may want ECDC in D2 between shots. We would like to have the TCI working. We will probably also puff some argon for HIREX Ti (and Te) measurements. | |
| Jun 18 2002 08:31:11:997AM | Robert Granetz | Overnight ECDC in D2 was done. Hybrid coldstart done; no errors found Loaded PCS from shot 1020607016. | |
| Jun 18 2002 08:53:18:270AM | 1020618001 | Robert Granetz | Shot 01 -- Test. Pre-fill pressure is rather low, even though the pulse is the same 29 ms as last week. Plenum pressure is a little low. It'll be brought up to 6 psi for the next shot. |
| Jun 18 2002 09:05:01:043AM | 1020618001 | Robert Granetz | I've zeroed the NL_04 gain for all of segment 2, and I've set the pre-programmed voltage to be ~ -25 V for C-side valve (pulse gas 3). This is because we don't know how well the TCI will be working. |
| Jun 18 2002 09:24:38:490AM | 1020618002 | Robert Granetz | Shot 02 -- Test. Pre-fill pressure looks good now. |
| Jun 18 2002 10:00:33:720AM | 1020618003 | Robert Granetz | Shot 03 -- Plasma. Ip=0.73 MA. Disrupted at 0.43 s. TCI worked fine. NL_04=0.6-0.7e20 m-2 until 0.4 s, then the density starts to rise. Next shot: turn on nl_04 feedback (0.7e20 m-2), set pre-programmed voltage for C-side to 0 volts in segment 2. Also adjust Btor to be 5.3 T for the entire shot (was set at 4.8 T in segment 2 for some reason). Steve Wolfe is working on getting EFIT going. |
| Jun 18 2002 10:27:03:747AM | 1020618004 | Robert Granetz | Shot 04 -- Dud. The F21 flux loop is having an offset problem. There was also a camac problem with magnetics traq_2 (mostly Bp data). |
| Jun 18 2002 11:11:42:757AM | 1020618005 | Robert Granetz | Shot 05 -- Dud. Fields look reasonable, as does gas. F21 looks fine as well. Must just be dirt from shot 3. Steve and I have been looking at processed BP_14 and BP_15, and we think something is wrong with these signals, although they begin at, and return to zero. These signals use BP15_JK and BP16_JK. The corresponding signals on the BC and DE quadrants look much more reasonable. Between-shot ECDC is starting now. |
| Jun 18 2002 11:44:44:100AM | 1020618006 | Robert Granetz | Shot 06 -- Fizzle. I think it was the 15 minutes of ECDC that got it back. Bz0 and Br0 dropped a tiny bit. ECDC in D2 between shots. Next shot: reduce pre-fill pulse length by 3 ms (29 -> 26 ms) |
| Jun 18 2002 12:20:05:790PM | 1020618007 | Robert Granetz | Shot 07 -- Fizzle. Looks like it hit something. Fields look good (Br0 jumped back up to pre-shot_06 value without me doing anything.) Brian Labombard has just calibrated the F-side-ratiomatic signal and finds that it was reading 35% low until now. He has gone back and corrected all the shots from today. It's now showing 0.07 mtorr. Between-shot ECDC Next shot: no changes. |
| Jun 18 2002 12:37:12:110PM | 1020618008 | Robert Granetz | Shot 08 -- Dud. Time to change the pre-fill. Between-shot ECDC Next shot: reduce pre-fill pulse by another 3 ms (26 -> 23 ms) |
| Jun 18 2002 01:16:45:967PM | 1020618009 | Robert Granetz | Shot 09 -- Plasma. Disrupted at t=0.28 s, Ip=0.6 MA. nl_04=0.9e20 m-2. Carbon II burns out pretty well. Noticeable hesitation on current rise between t=10 and 20 ms. Bz0 was a little high around t=10 ms. Pre-fill=0.06 mtorr. Not clear what caused the disruption, although the 2pi bolo shows lots of spiky stuff. Between-shot ECDC Next shot: no changes |
| Jun 18 2002 02:05:21:360PM | 1020618010 | Robert Granetz | Shot 10 -- Fizzle. Bz0 looks a bit high. Between-shot ECDC Next shot: reduce IC_EF4 by 10 amps. |
| Jun 18 2002 02:05:33:627PM | 1020618011 | Robert Granetz | Shot 11 -- Fizzle. Between-shot ECDC Next shot: lower the pre-fill another 2 ms. |
| Jun 18 2002 02:16:47:620PM | 1020618012 | Robert Granetz | Shot 12 -- Plasma. Ip=0.75 MA. Disrupted at t=0.61 s. H/D<=0.4. We have GPC Te data (1 keV ?). nl_04=1.0e20 m-2. Argon was definitely puffed. Between-shot ECDC Next shot: no changes |
| Jun 18 2002 02:35:42:647PM | 1020618013 | Robert Granetz | Shot 13 -- Fizzle. Probably just dirt. No ECDC, per Jim Irby's request, just to see what happens. Next shot: no changes |
| Jun 18 2002 03:03:53:760PM | 1020618014 | Robert Granetz | Shot 14 -- Plasma. Disrupted at 0.3 s. Most of these plasmas have been very resistive, with the current turning over prior to the disruption. Current rise still has a hesitation. No ECDC. Next shot: no changes |
| Jun 18 2002 03:28:07:097PM | 1020618015 | Robert Granetz | Shot 15 -- Fizzle. Re-starting between-shot ECDC Next shot: no changes |
| Jun 18 2002 03:52:21:670PM | 1020618016 | Robert Granetz | Shot 16 -- Fizzle. Bz0 has dropped a bit. Between-shot ECDC Next shot: increase IC_EF4 by 10 amps |
| Jun 18 2002 04:31:36:447PM | 1020618017 | Robert Granetz | Shot 17 -- Aborted. |
| Jun 18 2002 04:32:15:933PM | 1020618018 | Robert Granetz | Shot 18 -- Dud. Should have gone. Between-shot ECDC Next shot: no change |
| Jun 18 2002 05:05:19:070PM | 1020618019 | Robert Granetz | Shot 19 -- Plasma. Disrupted at t=0.3 s. Resistive. There's still a hesitation during the early current rise. Between-shot ECDC Next shot: no change |
| Jun 18 2002 05:19:58:370PM | 1020618020 | Robert Granetz | Shot 20 -- Fizzle. (strong fizzle). |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:28:31:327AM | Test | Ok | Cmod Cycle |
| 2 | 09:18:35:120AM | Test | Ok | Cycle Test Okay |
| 3 | 09:28:33:353AM | Plasma | Ok | |
| 4 | 10:02:04:197AM | Plasma | Ok | |
| 5 | 10:45:38:697AM | Plasma | Ok | |
| 6 | 11:32:50:430AM | Plasma | Bad | OH2L IOC Fault |
| 7 | 12:02:47:077PM | Plasma | Ok | |
| 8 | 12:31:14:237PM | Plasma | Ok | |
| 9 | 12:52:42:143PM | Plasma | Ok | |
| 10 | 01:18:20:830PM | Plasma | Ok | |
| 11 | 01:41:49:087PM | Plasma | Ok | |
| 12 | 02:05:25:157PM | Plasma | Ok | |
| 13 | 02:30:34:933PM | Test | Ok | |
| 14 | 02:53:26:283PM | Plasma | Ok | |
| 15 | 03:21:35:503PM | Plasma | Ok | |
| 16 | 03:46:18:890PM | Plasma | Ok | |
| 17 | 04:10:36:460PM | Plasma | Bad | IGor Fault , No power shot |
| 18 | 04:27:00:170PM | Plasma | Ok | |
| 19 | 04:52:04:480PM | Plasma | Ok | |
| 20 | 05:16:38:910PM | Plasma | Ok | |