| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Steve Wolfe |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Gary Dekow,Bill Cochran |
| Engineering Operator Run Comment |
| Startup and conditioning with normal field direction. Begin with power s |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:22:757PM |
| Author: To Be Determined |
| Session Leader Summary for Wed. April 5, 2000 Startup and Conditioning Run SL: wolfe PO: Granetz EO: Cochran,Dekow The goals of today's run were to get plasmas with the field in the normal (negative) direction; work on the startup; continue tokamak conditioning; and provide targets for diagnostic alignment, calibration, checkout, etc. ECDC in Helium was performed on Tuesday and for a couple hours prior to the beginning of the run. The idea of He ECDC was to deplete the walls, since during last week's run the walls were apparently the principal gas source, leading to uncontrolled density increases with the puff valves shut for most of the discharge. The run began with power system testing of all supplies, since the bus work had just been reversed. This was completed with no problems (except for some computer crashes which are being blamed on the new network switches). The first plasma attempt was shot 14, which produced a flash. First plasma was #15, with no changes. The plasma lasted only to .32sec, which was typical of the rest of the day. The best shot of the day was #18, which lasted to almost 0.9sec. There was no sign of excessive gas influx from the walls. Nevertheless, a marfe typically set in at about 0.3 sec, with an accompanying rise in radiated power and loop voltage. Usually this was followed shortly by a disruption. There was some indication that the marfe was precipitated by injections, and meteor showers were observed on the fast camera at the correct time. The marfe preceded oh1 crossover, and while there was sometimes a coincidence of crossover and the disruption, this relationship is probably not causal. Changes to the position and shape programming, including keeping the plasma limited (shots #30,32) as well as increasing the gaps (#28), did not affect the problem at 0.3sec. The early disruption behavior is reminiscent of the period last year when the gas feed line was drooping into the plasma. However, we have not yet observed any evidence of iron, etc. in the spectroscopy. This should be confirmed during the next run, especially if the short shots persist. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:10:240PM |
| Author: To Be Determined |
| Physics operator summary for run 1000405: MP ? -- Startup and conditioning with normal field direction SL: S. Wolfe PO: R. Granetz EO: B. Cochran/G. Dekow Summary: Not a great day. Only one plasma made it far into flattop (shot 18). There were many plasmas that died around t=0.35-0.40 s, which may have had something to do with the marfing going on, but it's not clear at all. It may just be that the machine needs to clean up more. We tried moving the plasma away from the wall, then tried limiting it, all to no avail. Also, the startup was not very robust, resulting in a number of fizzles and even one dud. Scorecard: 12 plasmas 6 fizzles 1 dud 13 tests 0 aborted ---------- 32 total ------------------------------------------------------------------------------- Engineering setup for Wednesday, 1000405: Power supply tests (with normal bus direction) start at 08:30. Plasma run will begin at 10:30 and end at 17:00 Overnight ECDC in helium, stopping 1 hour prior to the run. Power system setup as on 991110005 Note: Fizzle detector should be on from t=0.080 to 1.7 s Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED leave B-side upper as is Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV ------------------------------------------------------------------------------- Physics operator's setup for Wednesday, 1000405 MP ? -- Startup and conditioning with normal field direction Session leader: S. Wolfe Physics operator: R. Granetz The primary goals of this week's runs are: 1) Get plasma with normal (negative) field 2) Machine conditioning with tokamak plasmas 3) Checkout and commissioning of available diagnostics Load from shot 991110005 (typical 0.8 MA, 5.2 T, normal field direction), and update all relevant estimators in PCS to use partial flux loop F27 in place of F28. ------------------------------------------------------------------------------- Note from Jim Irby: "A TC fault kept us from re-starting ecdc last night. So you only got about 13 hours of ECDC. About 11 hours yesterday and 2 hours this morning from 6:00 to 8:00." Note: the ECDC was in helium. Hybrid coldstart done; no errors found Loaded 1000405000 (saved from yesterday---see logbook entry about that), which is based on shot 991110005. ------------------------------------------------------------------------------- Shot 01 -- Test; no power. Shot 02 -- Test; EF4 under PLC control. OK. Shot 03 -- Test; EF2U under PLC control. OK. Delay due to partial crash and reboot of computer cluster. Shot 04 -- Test; EF2L under PLC control. Shot 05 -- Test; EFC under PLC control. OK. Shot 06 -- Test; EF3 under PLC control. OK. Delay due to crash and reboot of node RHONE (engineering workstation). Shot 07 -- Test; OH2U under PLC control. OK. Shot 08 -- Test; OH2L under PLC control. OK. Shot 09 -- Test; OH1 under PLC control. OK. Shot 10 -- Test; EF1U under PLC control. OK. Shot 11 -- Test; EF1L under PLC control. OK. Shot 12 -- Test; TF 50 kA under PLC control. OK. Shot 13 -- Test; TF 100 kA under PLC control. OK. End of power supply tests. Time: 11:15 Start of plasma run. Set pre-fill gas puff at 20 ms. Shot 14 -- Fizzle. 40 kA. Null looks reasonable. Next shot: no changes. Shot 15 -- Plasma. Terminated at t=0.33 s. Runaway shot. Next shot: change IC_EF4 by +15 A, increase pre-fill puff from 20 to 22 ms. Shot 16 -- Plasma. Terminated at t=0.44 s. Good early current rise. Hard x-rays are nearly all gone. An impurity event happened around t=0.31 s which took a bite out of the plasma current. We can see it on the fast video camera. Next shot: no changes. Shot 17 -- Plasma. Terminated at t=0.38 s. Similar to preceding shot, except lots of hard x-rays. Current rise wasn't quite as nice. Next shot: increase pre-fill puff from 22 to 25 ms. Shot 18 -- Plasma. Lasted until t=0.87 s. Much fewer hard x-rays. Nice current rise. Line density reaches 1e20 m-2. Still lots of marfing. Next shot: tweak RCUR programming around the time of cross-over. Shot 19 -- Plasma. Terminated at t=0.32 s. Lots of runaways. Next shot: tweak IC_EF4 again by +15 A. Start gas valve programming 5 ms earlier (now at t=25 ms instead of 30 ms). Shot 20 -- Plasma. Terminated at t=0.41 s. Much fewer hard x-rays. Nice current rise. Next shot: try tweaking RCUR programming again, this time pushing things 200 ms earlier (per Steve's suggestion). Shot 21 -- Fizzle. Next shot: change IC_EF4 by -10 A. Shot 22 -- Fizzle. Fields and pressure are essentially the same as previous plasma shots. Next shot: try tweaking Br0 up by +0.0005 T Shot 23 -- Fizzle. Next shot: reload shot 18 Shot 24 -- Plasma. Terminated at t=0.40 s. Magnetics TRAQ_1 data is corrupted. Great breakdown and early ramp. Next shot: import segment 2 from shot 21, in order to recover the RCUR changes made before reloading shot 18. Shot 25 -- Plasma. Terminated at t=0.34 s. Next shot: reduce RCUR by 3 mm for most of the flattop. Shot 26 -- Plasma. Terminated at t=0.34 s. Nearly identical to the preceding shot. Next shot: increase CLEARIN by 5 mm. Shot 27 -- Fizzle. Next shot: no changes Shot 28 -- Plasma. Terminated at t=0.34 s again. Next shot: Steve wants to try a limited shot. Decrease CLEARIN from -5 mm to -5 cm for the entire shot. Shot 29 -- Fizzle. Next shot: tweak Br0 offset by -0.0005 T. Shot 30 -- Plasma. Terminated at t=0.35 s. Plasma may have touched outboard limiter. Next shot: reduce RCUR by 1 cm over the entire shot. Shot 31 -- Dud. Hard to believe. Next shot: tweak IC_EF4 by -15 A. Also drop programmed density to nl_04=0.5e20 m-2. Shot 32 -- Plasma. Became disruptive at t=0.40 s and finally died at t=0.47 s. End of run. |
| Session Leader Comments | |||
| Apr 5 2000 11:18:08:780AM | 1000405013 | Steve Wolfe | shot 13: 100kA tf Next shot: First try for plasma with normal field. |
| Apr 5 2000 11:52:27:390AM | 1000405015 | Steve Wolfe | shot 14: try for plasma. fizzle |
| Apr 5 2000 11:54:28:590AM | 1000405015 | Steve Wolfe | shot 15: repeat. Plasma to .32sec; dies at crossover. Lots of runaways. Needs more gas early, and more Bz early. |
| Apr 5 2000 12:18:22:483PM | 1000405016 | Steve Wolfe | shot 16: Another short one, 430msec. runaway dump at .35 Current rise is much better, still looks a little outside. CII ~.005 Next shot: repeat |
| Apr 5 2000 12:46:53:250PM | 1000405018 | Steve Wolfe | shot 17: similar. lasted to 380msec Lots of runaways again. Current rise has a hesitation. bd a little later (6.4msec) |
| Apr 5 2000 12:54:27:670PM | 1000405018 | Steve Wolfe | shot 18: plasma to .87sec, possible vertical problem at the end. Some runaway dumps, not nearly as bad. current rise is better. Br0 may be a little negative. |
| Apr 5 2000 01:09:44:343PM | 1000405019 | Steve Wolfe | shot 19: tweak to delay RCUR move out from .28 to .35sec plasma to .32, lots of runaways again. The rcur tweak didn't help. CII~.01 |
| Apr 5 2000 01:40:47:467PM | 1000405020 | Steve Wolfe | shot 20: move seg 1 pg3 puff earlier by 5ms. make ef4 another 15a more positive and hope we don't lose the startup. plasma to .41sec; still a small runaway dump. |
| Apr 5 2000 01:51:35:593PM | 1000405021 | Steve Wolfe | shot 21: Try moving the rcur shift before crossover. fizzle |
| Apr 5 2000 02:17:40:013PM | 1000405023 | Steve Wolfe | shot 22: take 10 amps off ef4 Try moving the rcur shift before crossover. another fizzle. |
| Apr 5 2000 02:17:58:903PM | 1000405023 | Steve Wolfe | shot 23: br tweak another fizzle. |
| Apr 5 2000 02:44:53:500PM | 1000405024 | Steve Wolfe | shot 24: reload shot 18. plasma to .4sec. Startup looks good. Magnetics data is screwed up, traq failure? Next shot: copy seg 2 from shot 21 |
| Apr 5 2000 03:04:21:403PM | 1000405025 | Steve Wolfe | shot 25: copy seg 2 from shot 21 to put back early rcur shift. another short plasma .330 Something is coming in at .3sec, regardless of what we do to rcur |
| Apr 5 2000 03:15:51:670PM | 1000405026 | Steve Wolfe | shot 26: rcur in by 3mm almost identical. |
| Apr 5 2000 03:35:17:937PM | 1000405027 | Steve Wolfe | shot 27: increase clearin by 5mm fizzle. |
| Apr 5 2000 03:47:23:967PM | 1000405028 | Steve Wolfe | shot 28: repeat:increase clearin by 5mm almost identical to 26. next shot: limit it. |
| Apr 5 2000 04:02:54:640PM | 1000405029 | Steve Wolfe | shot 29: keep it limited the whole shot (clearin=-.05) fizzle. try tweaking br in the other direction |
| Apr 5 2000 04:22:11:170PM | 1000405030 | Steve Wolfe | shot 30: try tweaking br in the other direction plasma to .35. It is limited; it doesn't care! It gets very close on the outside, because we didn't move rcur when we changed clearin. next shot: move rcur in by 1cm |
| Apr 5 2000 04:42:01:170PM | 1000405031 | Steve Wolfe | shot 31: move rcur in by 1cm dud! |
| Physics Operator Comments | |||
| Apr 5 2000 09:00:45:797AM | Robert Granetz | Engineering setup for Wednesday, 1000405: Power supply tests (with normal bus direction) start at 08:30. Plasma run will begin at 10:30 and end at 17:00 Overnight ECDC in helium, stopping 1 hour prior to the run. Power system setup as on 991110005 Note: Fizzle detector should be on from t=0.080 to 1.7 s Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED leave B-side upper as is Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV | |
| Apr 5 2000 09:00:58:043AM | Robert Granetz | Physics operator's setup for Wednesday, 1000405 MP ? -- Startup and conditioning with normal field direction Session leader: S. Wolfe Physics operator: R. Granetz The primary goals of this week's runs are: 1) Get plasma with normal (negative) field 2) Machine conditioning with tokamak plasmas 3) Checkout and commissioning of available diagnostics Load from shot 991110005 (typical 0.8 MA, 5.2 T, normal field direction), and update all relevant estimators in PCS to use partial flux loop F27 in place of F28. | |
| Apr 5 2000 09:01:10:840AM | Robert Granetz | Note from Jim Irby: "A TC fault kept us from re-starting ecdc last night. So you only got about 13 hours of ECDC. About 11 hours yesterday and 2 hours this morning from 6:00 to 8:00." Note: the ECDC was in helium. Hybrid coldstart done; no errors found Loaded 1000405000 (saved from yesterday---see logbook entry about that), which is based on shot 991110005. | |
| Apr 5 2000 09:01:25:390AM | 1000405001 | Robert Granetz | Shot 01 -- Test; no power. |
| Apr 5 2000 09:01:37:530AM | 1000405002 | Robert Granetz | Shot 02 -- Test; EF4 under PLC control. |
| Apr 5 2000 09:31:34:780AM | 1000405003 | Robert Granetz | Shot 03 -- Test; EF2U under PLC control. |
| Apr 5 2000 09:32:22:687AM | 1000405003 | Robert Granetz | Delay due to partial crash and reboot of computer cluster. |
| Apr 5 2000 09:40:00:967AM | 1000405004 | Robert Granetz | Shot 04 -- Test; EF2L under PLC control. |
| Apr 5 2000 09:53:03:873AM | 1000405005 | Robert Granetz | Shot 05 -- Test; EFC under PLC control. OK. |
| Apr 5 2000 09:56:05:873AM | 1000405006 | Robert Granetz | Shot 06 -- Test; EF3 under PLC control. OK. |
| Apr 5 2000 10:10:35:950AM | 1000405006 | Robert Granetz | Delay due to crash and reboot of node RHONE (engineering workstation). |
| Apr 5 2000 10:24:07:840AM | 1000405007 | Robert Granetz | Shot 07 -- Test; OH2U under PLC control. OK. |
| Apr 5 2000 10:29:26:450AM | 1000405008 | Robert Granetz | Shot 08 -- Test; OH2L under PLC control. OK. |
| Apr 5 2000 10:39:06:577AM | 1000405009 | Robert Granetz | Shot 09 -- Test; OH1 under PLC control. OK. |
| Apr 5 2000 10:47:09:577AM | 1000405010 | Robert Granetz | Shot 10 -- Test; EF1U under PLC control. OK. |
| Apr 5 2000 10:57:31:483AM | 1000405011 | Robert Granetz | Shot 11 -- Test; EF1L under PLC control. OK. |
| Apr 5 2000 11:03:55:060AM | 1000405012 | Robert Granetz | Shot 12 -- Test; TF 50 kA under PLC control. OK. |
| Apr 5 2000 11:14:50:980AM | 1000405013 | Robert Granetz | Shot 13 -- Test; TF 100 kA under PLC control. OK. End of power supply tests. Time: 11:15 Start of plasma run. Set pre-fill gas puff at 20 ms. |
| Apr 5 2000 11:41:17:577AM | 1000405014 | Robert Granetz | Shot 14 -- Fizzle. 40 kA. Null looks reasonable. Next shot: no changes. |
| Apr 5 2000 12:01:29:890PM | 1000405015 | Robert Granetz | Shot 15 -- Plasma. Terminated at t=0.33 s. Runaway shot. Next shot: change IC_EF4 by +15 A, increase pre-fill puff from 20 to 22 ms. |
| Apr 5 2000 12:21:59:047PM | 1000405016 | Robert Granetz | Shot 16 -- Plasma. Terminated at t=0.44 s. Good early current rise. Hard x-rays are nearly all gone. An impurity event happened around t=0.31 s which took a bite out of the plasma current. We can see it on the fast video camera. Next shot: no changes. |
| Apr 5 2000 12:36:32:950PM | 1000405017 | Robert Granetz | Shot 17 -- Plasma. Terminated at t=0.38 s. Similar to preceding shot, except lots of hard x-rays. Current rise wasn't quite as nice. Next shot: increase pre-fill puff from 22 to 25 ms. |
| Apr 5 2000 01:11:10:093PM | 1000405019 | Robert Granetz | Shot 19 -- Plasma. Terminated at t=0.32 s. Lots of runaways. Next shot: tweak IC_EF4 again by +15 A. Start gas valve programming 5 ms earlier (now at t=25 ms instead of 30 ms). |
| Apr 5 2000 01:35:17:233PM | 1000405020 | Robert Granetz | Shot 20 -- Plasma. Terminated at t=0.41 s. Much fewer hard x-rays. Nice current rise. Next shot: try tweaking RCUR programming again, this time pushing things 200 ms earlier (per Steve's suggestion). |
| Apr 5 2000 01:50:07:107PM | 1000405021 | Robert Granetz | Shot 21 -- Fizzle. Next shot: change IC_EF4 by -10 A. |
| Apr 5 2000 02:13:20:547PM | 1000405022 | Robert Granetz | Shot 22 -- Fizzle. Fields and pressure are essentially the same as previous plasma shots. Next shot: try tweaking Br0 up by +0.0005 T |
| Apr 5 2000 02:20:33:233PM | 1000405023 | Robert Granetz | Shot 23 -- Fizzle. Next shot: reload shot 18 |
| Apr 5 2000 02:47:12:840PM | 1000405024 | Robert Granetz | Shot 24 -- Plasma. Terminated at t=0.40 s. Magnetics TRAQ_1 data is corrupted. Great breakdown and early ramp. Next shot: import segment 2 from shot 21, in order to recover the RCUR changes made before reloading shot 18. |
| Apr 5 2000 03:09:07:750PM | 1000405025 | Robert Granetz | Shot 25 -- Plasma. Terminated at t=0.34 s. Next shot: reduce RCUR by 3 mm for most of the flattop. |
| Apr 5 2000 03:19:34:140PM | 1000405026 | Robert Granetz | Shot 26 -- Plasma. Terminated at t=0.34 s. Nearly identical to the preceding shot. Next shot: increase CLEARIN by 5 mm. |
| Apr 5 2000 03:35:35:107PM | 1000405027 | Robert Granetz | Shot 27 -- Fizzle. Next shot: no changes |
| Apr 5 2000 03:49:12:683PM | 1000405028 | Robert Granetz | Shot 28 -- Plasma. Terminated at t=0.34 s again. Next shot: Steve wants to try a limited shot. Decrease CLEARIN from -5 mm to -5 cm for the entire shot. |
| Apr 5 2000 04:05:10:920PM | 1000405029 | Robert Granetz | Shot 29 -- Fizzle. Next shot: tweak Br0 offset by -0.0005 T. |
| Apr 5 2000 04:24:20:450PM | 1000405030 | Robert Granetz | Shot 30 -- Plasma. Terminated at t=0.35 s. Plasma may have touched outboard limiter. Next shot: reduce RCUR by 1 cm over the entire shot. |
| Apr 5 2000 04:44:17:810PM | 1000405031 | Robert Granetz | Shot 31 -- Dud. Hard to believe. Next shot: tweak IC_EF4 by -15 A. Also drop programmed density to nl_04=0.5e20 m-2. |
| Apr 5 2000 05:02:35:030PM | 1000405032 | Robert Granetz | Shot 32 -- Plasma. Became disruptive at t=0.40 s and finally died at t=0.47 s. End of run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:50:29:483AM | Test | Bad | Tree Disabled |
| 2 | 08:57:30:670AM | Test | Ok | EF4 Forward Bridge Test |
| 3 | 09:06:31:547AM | Test | Bad | |
| 4 | 09:37:47:467AM | Test | Ok | EF2L Test |
| 5 | 09:46:12:653AM | Test | Ok | EFc Test |
| 6 | 09:53:21:280AM | Test | Ok | EF3 Test |
| 7 | 10:21:18:717AM | Test | Ok | OH2U Test |
| 8 | 10:27:55:450AM | Test | Ok | OH2L TEST |
| 9 | 10:35:37:123AM | Test | Ok | OH1 Test |
| 10 | 10:45:13:547AM | Test | Ok | EF1U Test |
| 11 | 10:54:42:420AM | Test | Ok | EF1L Test |
| 12 | 11:02:13:577AM | Test | Ok | TF 50KA Test |
| 13 | 11:12:35:123AM | Test | Ok | TF 100KA Test |
| 14 | 11:36:28:903AM | Plasma | Ok | No Faults |
| 15 | 11:50:38:700AM | Plasma | Ok | PLasma |
| 16 | 12:06:10:670PM | Plasma | Ok | |
| 17 | 12:25:27:890PM | Plasma | Ok | |
| 18 | 12:46:25:890PM | Plasma | Ok | |
| 19 | 01:03:53:013PM | Plasma | Ok | |
| 20 | 01:21:57:653PM | Plasma | Bad | OH1 Self Powered Circuit Fired |
| 21 | 01:45:09:500PM | Plasma | Ok | |
| 22 | 02:00:22:200PM | Plasma | Ok | |
| 23 | 02:15:30:590PM | Plasma | Ok | |
| 24 | 02:35:31:280PM | Plasma | Bad | OH1 self powered circuit fired |
| 25 | 02:56:16:810PM | Plasma | Ok | |
| 26 | 03:13:37:750PM | Plasma | Ok | |
| 27 | 03:29:29:717PM | Plasma | Ok | |
| 28 | 03:42:58:263PM | Plasma | Ok | |
| 29 | 04:00:55:543PM | Plasma | Ok | |
| 30 | 04:15:04:653PM | Plasma | Ok | |
| 31 | 04:34:06:717PM | Plasma | Ok | |
| 32 | 04:49:29:390PM | Plasma | Ok | |