| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Ian Hutchinson,Steve Wolfe |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Bill Cochran,Gary Dekow,Frank Silva |
| Engineering Operator Run Comment |
| Reverse Field Start up/Irby,Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:10:210PM |
| Author: To Be Determined |
| Run Summary for 1000331 PO: Irby SL: Hutch, Wolfe EO: Silva, Cochran, Dekow The main goals for today's run were to continue conditioning the machine and bring up diagnostics. The startup in reversed field fine tuned yesterday proved to be as robust today as we have found with the field in the normal direction. Though we got several long lasting discharges, the plasmas are still very dirty and primarily fueled from the walls. We had only one brief period on shot 12 in which the density was under control. The MARFE went away and injections ceased during this period. The VUV indicates a large amount of carbon and HiReX bright moly emission at least during periods of low density. The H to D ratios ranged from 0.4 to greater than 1, increasing during the day. Now that we have reliable startup with long discharge durations, we should be able to clean up the machine quickly. Problems: The EF2 breaker we first had problems with yesterday had to be replaced before the run. Score: plasma duration Comment 1 TF test 2 EF2 breaker test 3 0.36 4 0.90 H to D 0.4 5 1.65 6 fizzle (68kA) 7 fizzle (40kA) 8 0.41 9 dud EF4 tweak in wrong direction 10 0.39 EF4 detweaked --- increased Br0 11 1.48 12 1.36 lost MARFE -- had density control 13 1.48 14 1.6 changed rampdown 15 fizzle (40kA) 16 1.63 Details: Entry display output on Fri Mar 31 22:16:11 2000 ---------------------------------------------------------------------------- 1000331xxx irby PHYSICS_OPERATOR Mar 31 2000 8:09:54:840AM . . . . . . . . . . . . . . . . . . . . Loaded last shot from yesterday, 1000330026 Did cold start ---------------------------------------------------------------------------- 1000331xxx irby PHYSICS_OPERATOR Mar 31 2000 8:17:48:000AM . . . . . . . . . . . . . . . . . . . . Run plan is to continue cleaning up machine and bringing diagnostics on line. Hope to have more spectroscopy data today looking for Cu, Fe, etc. ---------------------------------------------------------------------------- 1000331001 irby PHYSICS_OPERATOR Mar 31 2000 8:55:31:966AM . . . . . . . . . . . . . . . . . . . . First shot is TF only test. Then we will have to break for about 1 hour to fix EF2 breaker All TF taps look very good: turn #79 about 1.4 uOhm. We ran both gas puffs under hybrid control. Gas coming into machine looks very good on RGA (all D2). We are getting an increase in mass 18 in CHECK. Will not enable any gatevalves for the next shot: VUV or ECE?? ---------------------------------------------------------------------------- 1000331002 irby PHYSICS_OPERATOR Mar 31 2000 10:41:35:186AM . . . . . . . . . . . . . . . . . . . . EF2 test only. No gatevalves enabled. No mass 18. EF2 looks good. Rejean manually opened ECE valve after shot and we saw the mass 18 go up. ---------------------------------------------------------------------------- 1000331002 silva POWER_SYSTEMS Mar 31 2000 11:49:29:623AM . . . . . . . . . . . . . . . . . . . . The EF2U cabinet D power supply 480Vac main feeder breaker mounted inside the power supply would not latch closed. The problem was found to be a mechanical failure inside the breaker. The breaker was then replaced with a spare. ---------------------------------------------------------------------------- 1000331003 wolfe SESSION_LEADER Mar 31 2000 10:59:07:513AM . . . . . . . . . . . . . . . . . . . . shot#3: First plasma attempt. plasma - .36sec. CII ~.005mW/cm2/ster lots of injections, leading to a disruption ---------------------------------------------------------------------------- 1000331003 irby PHYSICS_OPERATOR Mar 31 2000 11:05:22:950AM . . . . . . . . . . . . . . . . . . . . Plasma; about 360 ms Only enabled VUV: Still have mass 18 before shot Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 5.7942 26.5702 106.9892 dIp/dt (kA/ms): 1.0151 3.1814 3.8172 7.6299 pressure (mTorr): 0.0491 0.0496 0.0508 0.0424 Bz0 (mT): 2.6031 0.9247 -2.2697 -22.6940 Br0 (mT): 0.3669 0.6496 0.9760 2.0665 oh1: 0.2662 uohm oh2u: 0.1359 uohm oh2l: 0.2347 uohm Ricky's movie shows MARFE move up inner wall to top of machine followed by a couple of UFOs and the disruption Jim's first look at impurities indicates lots of carbon. Carbon II at 0.01 s is pretty low: .004. Gas valve off at 0.137 s, but density continues to rise at somewhat lower rate H to D bottoms out at around 15% ---------------------------------------------------------------------------- 1000331004 wolfe SESSION_LEADER Mar 31 2000 11:17:29:106AM . . . . . . . . . . . . . . . . . . . . shot 4: plasma to 0.9sec, density dropping down toward program value after 0.8sec It looks like the marfe disappears at about the same time as the density begins to drop. ---------------------------------------------------------------------------- 1000331004 irby PHYSICS_OPERATOR Mar 31 2000 11:39:48:170AM . . . . . . . . . . . . . . . . . . . . Repeat last shot Plasma for 0.94 seconds VUV and ECE gatevalves enabled Looks like we are cleaning things up. Nicely diverted. MARFE at top of machine goes away and density goes down. Peak density twice what we asked for. Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5475 106.9664 dIp/dt (kA/ms): 1.2727 3.1791 3.5595 7.5016 pressure (mTorr): 0.0485 0.0485 0.0496 0.0410 Bz0 (mT): 3.0298 0.1309 -1.4030 -22.2139 Br0 (mT): 0.4974 0.7137 0.9789 1.7890 H to D about 0.4 Note that DNB has been running with the C-Mod cycle for the last few shots. ---------------------------------------------------------------------------- 1000331005 irby PHYSICS_OPERATOR Mar 31 2000 11:57:24:296AM . . . . . . . . . . . . . . . . . . . . Plasma for 1.647 seconds Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5702 109.5606 dIp/dt (kA/ms): 1.2716 3.3085 3.8127 6.8691 pressure (mTorr): 0.0485 0.0480 0.0491 0.0410 Bz0 (mT): 3.2477 0.3841 -2.3055 -21.7856 Br0 (mT): 0.7135 1.0341 0.9833 1.5873 H to D at 1.0 s is 0.75 Got into rampdown. ---------------------------------------------------------------------------- 1000331006 irby PHYSICS_OPERATOR Mar 31 2000 12:10:11:670PM . . . . . . . . . . . . . . . . . . . . Repeat Waited 20 minutes between shots, vs 25 last shot Plasma for 24 ms or so, 68 kA Rapid rise in CII after 20 ms Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.4111 26.5702 21.3592 dIp/dt (kA/ms): 1.2739 3.4345 3.3040 -4.5790 pressure (mTorr): 0.0485 0.0491 0.0485 0.0424 Bz0 (mT): 3.4408 1.2651 -1.0058 -19.4101 Br0 (mT): 0.4342 0.7853 1.0820 0.4148 ---------------------------------------------------------------------------- 1000331007 irby PHYSICS_OPERATOR Mar 31 2000 12:42:00:480PM . . . . . . . . . . . . . . . . . . . . 20 minutes wait PCS repeat, though Ian suggests Br0 may need a tweak if this one doesn't go. plasma but only 43 kA, 20 ms ---------------------------------------------------------------------------- 1000331008 silva POWER_SYSTEMS Mar 31 2000 12:57:13:560PM . . . . . . . . . . . . . . . . . . . . OH2U,OH2L commutation fault, OH1 self powered circuit fired Voltage spike on OH1 bus at time of disruption appears to be the source of the fault. ---------------------------------------------------------------------------- 1000331008 irby PHYSICS_OPERATOR Mar 31 2000 1:05:49:390PM . . . . . . . . . . . . . . . . . . . . EF4 from +1310 to +1280. Forgot to load it!! RGA impurity levels below pre-run levels for this shot Plasma for 0.41 s. Some runaways. Lost it on crossover ---------------------------------------------------------------------------- 1000331009 irby PHYSICS_OPERATOR Mar 31 2000 1:12:51:216PM . . . . . . . . . . . . . . . . . . . . EF4 should really be at +1280 amps this shot Added 1 ms to pre-puff DuD! Looks like we took EF4 the wrong way. ---------------------------------------------------------------------------- 1000331010 irby PHYSICS_OPERATOR Mar 31 2000 1:40:09:326PM . . . . . . . . . . . . . . . . . . . . EF4 back to +1310 Amps Br0 from -2.5 mT to -1.5 mT Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5475 109.5606 dIp/dt (kA/ms): 1.2705 3.3063 4.1976 6.9952 pressure (mTorr): 0.0502 0.0496 0.0508 0.0424 Bz0 (mT): 1.7570 -0.3335 -3.0127 -21.0392 Br0 (mT): 1.4693 1.7684 2.2450 3.0543 We got more Br0 Looks like MARFE is starting before crossover. Lots of UFOs. Low RGA levels before shot. CII level at 0.01 s is .004 ---------------------------------------------------------------------------- 1000331011 irby PHYSICS_OPERATOR Mar 31 2000 2:03:09:750PM . . . . . . . . . . . . . . . . . . . . PCS Repeat IGT at 6.3e-7 at init Plasma for 1.48 seconds Still getting about twice the density we are asking for. CII 0.05 at .01 s Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5475 99.2067 dIp/dt (kA/ms): 1.2717 3.1791 3.9432 6.6148 pressure (mTorr): 0.0502 0.0519 0.0508 0.0444 Bz0 (mT): 2.0653 0.3798 -1.6186 -21.1178 Br0 (mT): 1.5637 1.6137 1.8969 3.1692 ---------------------------------------------------------------------------- 1000331012 irby PHYSICS_OPERATOR Mar 31 2000 2:22:59:420PM . . . . . . . . . . . . . . . . . . . . PCS repeat IGT at 8.1e-7 at init Plasma for 1.36 s Reached programmed density late in shot. Something was burned off! 2Pi drops and injections stop. John says lots of moly: "It's really up there" Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 23.9534 96.5898 dIp/dt (kA/ms): 1.2728 3.0508 3.5584 6.6115 pressure (mTorr): 0.0514 0.0519 0.0525 0.0459 Bz0 (mT): 2.1359 -0.4380 -1.4667 -19.5610 Br0 (mT): 1.5858 1.6276 1.7492 3.1725 Note that Bz0 is jumping +-0.4 mT. Br0 pretty stable. H to D 1.0 at 1.0 seconds and rising ---------------------------------------------------------------------------- 1000331013 irby PHYSICS_OPERATOR Mar 31 2000 2:32:45:670PM . . . . . . . . . . . . . . . . . . . . PCS repeat IGT 8.9e-7 Torr at init Plasma for 1.48 s MARFE is back No density control again Moly early but went away later in shot (higher density?) ---------------------------------------------------------------------------- 1000331014 irby PHYSICS_OPERATOR Mar 31 2000 2:56:21:856PM . . . . . . . . . . . . . . . . . . . . Enabled argon puff for John Changed clearin, zxl, rcur, and rxu to start rampdown at about 1.3 s instead of 1.5 Plasma for 1.6 s Rampdown is much better CII at .005 at 0.01 s oh1: 0.2398 uohm oh2u: 0.1331 uohm oh2l: 0.3124 uohm ---------------------------------------------------------------------------- 1000331015 irby PHYSICS_OPERATOR Mar 31 2000 3:14:51:576PM . . . . . . . . . . . . . . . . . . . . Steve wants to put less demand on EF1: Dropped ZXU from 0.048 to 0.025 Set RXU to 0 across shot 40 kA plasma ---------------------------------------------------------------------------- 1000331016 irby PHYSICS_OPERATOR Mar 31 2000 3:35:31:780PM . . . . . . . . . . . . . . . . . . . . PCS repeat plasma for 1.63 seconds EF1s still railed CII .004 at 0.01 s Density still out of control Jim sees a little Fe, but should not be our problem Steve claims we were "a little double nulled" |
| Session Leader Comments | |||
| Mar 31 2000 10:59:07:513AM | 1000331003 | Steve Wolfe | shot#3: First plasma attempt. plasma - .36sec. CII ~.005mW/cm2/ster lots of injections, leading to a disruption |
| Mar 31 2000 11:17:29:107AM | 1000331004 | Steve Wolfe | shot 4: plasma to 0.9sec, density dropping down toward program value after 0.8sec It looks like the marfe disappears at about the same time as the density begins to drop. |
| Physics Operator Comments | |||
| Mar 31 2000 08:09:54:840AM | Jim Irby | Loaded last shot from yesterday, 1000330026 Did cold start | |
| Mar 31 2000 08:17:48:000AM | Jim Irby | Run plan is to continue cleaning up machine and bringing diagnostics on line. Hope to have more spectroscopy data today looking for Cu, Fe, etc. | |
| Mar 31 2000 08:55:31:967AM | 1000331001 | Jim Irby | First shot is TF only test. Then we will have to break for about 1 hour to fix EF2 breaker All TF taps look very good: turn #79 about 1.4 uOhm. We ran both gas puffs under hybrid control. Gas coming into machine looks very good on RGA (all D2). We are getting an increase in mass 18 in CHECK. Will not enable any gatevalves for the next shot: VUV or ECE?? |
| Mar 31 2000 10:41:35:187AM | 1000331002 | Jim Irby | EF2 test only. No gatevalves enabled. No mass 18. EF2 looks good. Rejean manually opened ECE valve after shot and we saw the mass 18 go up. |
| Mar 31 2000 11:05:22:950AM | 1000331003 | Jim Irby | Plasma; about 360 ms Only enabled VUV: Still have mass 18 before shot Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 5.7942 26.5702 106.9892 dIp/dt (kA/ms): 1.0151 3.1814 3.8172 7.6299 pressure (mTorr): 0.0491 0.0496 0.0508 0.0424 Bz0 (mT): 2.6031 0.9247 -2.2697 -22.6940 Br0 (mT): 0.3669 0.6496 0.9760 2.0665 oh1: 0.2662 uohm oh2u: 0.1359 uohm oh2l: 0.2347 uohm Ricky's movie shows MARFE move up inner wall to top of machine followed by a couple of UFOs and the disruption Jim's first look at impurities indicates lots of carbon. Carbon II at 0.01 s is pretty low: .004. Gas valve off at 0.137 s, but density continues to rise at somewhat lower rate H to D bottoms out at around 15% |
| Mar 31 2000 11:39:48:170AM | 1000331004 | Jim Irby | Repeat last shot Plasma for 0.94 seconds VUV and ECE gatevalves enabled Looks like we are cleaning things up. Nicely diverted. MARFE at top of machine goes away and density goes down. Peak density twice what we asked for. Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5475 106.9664 dIp/dt (kA/ms): 1.2727 3.1791 3.5595 7.5016 pressure (mTorr): 0.0485 0.0485 0.0496 0.0410 Bz0 (mT): 3.0298 0.1309 -1.4030 -22.2139 Br0 (mT): 0.4974 0.7137 0.9789 1.7890 H to D about 0.4 Note that DNB has been running with the C-Mod cycle for the last few shots. |
| Mar 31 2000 11:57:24:297AM | 1000331005 | Jim Irby | Plasma for 1.647 seconds Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5702 109.5606 dIp/dt (kA/ms): 1.2716 3.3085 3.8127 6.8691 pressure (mTorr): 0.0485 0.0480 0.0491 0.0410 Bz0 (mT): 3.2477 0.3841 -2.3055 -21.7856 Br0 (mT): 0.7135 1.0341 0.9833 1.5873 H to D at 1.0 s is 0.75 Got into rampdown. |
| Mar 31 2000 12:10:11:670PM | 1000331006 | Jim Irby | Repeat Waited 20 minutes between shots, vs 25 last shot Plasma for 24 ms or so, 68 kA Rapid rise in CII after 20 ms Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.4111 26.5702 21.3592 dIp/dt (kA/ms): 1.2739 3.4345 3.3040 -4.5790 pressure (mTorr): 0.0485 0.0491 0.0485 0.0424 Bz0 (mT): 3.4408 1.2651 -1.0058 -19.4101 Br0 (mT): 0.4342 0.7853 1.0820 0.4148 |
| Mar 31 2000 12:42:00:480PM | 1000331007 | Jim Irby | 20 minutes wait PCS repeat, though Ian suggests Br0 may need a tweak if this one doesn't go. plasma but only 43 kA, 20 ms |
| Mar 31 2000 01:05:49:390PM | 1000331008 | Jim Irby | EF4 from +1310 to +1280. Forgot to load it!! RGA impurity levels below pre-run levels for this shot Plasma for 0.41 s. Some runaways. Lost it on crossover |
| Mar 31 2000 01:12:51:217PM | 1000331009 | Jim Irby | EF4 should really be at +1280 amps this shot Added 1 ms to pre-puff DuD! Looks like we took EF4 the wrong way. |
| Mar 31 2000 01:40:09:327PM | 1000331010 | Jim Irby | EF4 back to +1310 Amps Br0 from -2.5 mT to -1.5 mT Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5475 109.5606 dIp/dt (kA/ms): 1.2705 3.3063 4.1976 6.9952 pressure (mTorr): 0.0502 0.0496 0.0508 0.0424 Bz0 (mT): 1.7570 -0.3335 -3.0127 -21.0392 Br0 (mT): 1.4693 1.7684 2.2450 3.0543 We got more Br0 Looks like MARFE is starting before crossover. Lots of UFOs. Low RGA levels before shot. CII level at 0.01 s is .004 |
| Mar 31 2000 02:03:09:750PM | 1000331011 | Jim Irby | PCS Repeat IGT at 6.3e-7 at init Plasma for 1.48 seconds Still getting about twice the density we are asking for. CII 0.05 at .01 s Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 26.5475 99.2067 dIp/dt (kA/ms): 1.2717 3.1791 3.9432 6.6148 pressure (mTorr): 0.0502 0.0519 0.0508 0.0444 Bz0 (mT): 2.0653 0.3798 -1.6186 -21.1178 Br0 (mT): 1.5637 1.6137 1.8969 3.1692 |
| Mar 31 2000 02:22:59:420PM | 1000331012 | Jim Irby | PCS repeat IGT at 8.1e-7 at init Plasma for 1.36 s Reached programmed density late in shot. Something was burned off! 2Pi drops and injections stop. John says lots of moly: "It's really up there" Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -4.5824 8.3884 23.9534 96.5898 dIp/dt (kA/ms): 1.2728 3.0508 3.5584 6.6115 pressure (mTorr): 0.0514 0.0519 0.0525 0.0459 Bz0 (mT): 2.1359 -0.4380 -1.4667 -19.5610 Br0 (mT): 1.5858 1.6276 1.7492 3.1725 Note that Bz0 is jumping +-0.4 mT. Br0 pretty stable. H to D 1.0 at 1.0 seconds and rising |
| Mar 31 2000 02:32:45:670PM | 1000331013 | Jim Irby | PCS repeat IGT 8.9e-7 Torr at init Plasma for 1.48 s MARFE is back No density control again Moly early but went away later in shot (higher density?) |
| Mar 31 2000 02:56:21:857PM | 1000331014 | Jim Irby | Enabled argon puff for John Changed clearin, zxl, rcur, and rxu to start rampdown at about 1.3 s instead of 1.5 Plasma for 1.6 s Rampdown is much better CII at .005 at 0.01 s oh1: 0.2398 uohm oh2u: 0.1331 uohm oh2l: 0.3124 uohm |
| Mar 31 2000 03:14:51:577PM | 1000331015 | Jim Irby | Steve wants to put less demand on EF1: Dropped ZXU from 0.048 to 0.025 Set RXU to 0 across shot 40 kA plasma |
| Mar 31 2000 03:35:31:780PM | 1000331016 | Jim Irby | PCS repeat plasma for 1.63 seconds EF1s still railed CII .004 at 0.01 s Density still out of control Jim sees a little Fe, but should not be our problem Steve claims we were "a little double nulled" |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:31:06:967AM | Test | Ok | tf only |
| 2 | 10:28:16:250AM | Test | Ok | EF2U plc test only, no faults |
| 3 | 10:43:15:263AM | Plasma | Ok | no faults |
| 4 | 11:07:03:500AM | Plasma | Ok | |
| 5 | 11:36:25:750AM | Plasma | Ok | |
| 6 | 11:59:35:467AM | Plasma | Ok | |
| 7 | 12:22:46:700PM | Plasma | Ok | |
| 8 | 12:44:36:810PM | Plasma | Bad | OH2, OH1 power supply fault |
| 9 | 01:07:12:403PM | Plasma | Ok | no faults/no plasma |
| 10 | 01:22:14:530PM | Plasma | Ok | |
| 11 | 01:42:47:980PM | Plasma | Ok | |
| 12 | 02:03:45:310PM | Plasma | Ok | |
| 13 | 02:22:57:340PM | Plasma | Ok | |
| 14 | 02:45:11:827PM | Plasma | Ok | |
| 15 | 03:03:51:153PM | Plasma | Ok | |
| 16 | 03:24:26:090PM | Plasma | Ok | |