| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wolfe |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Cochran |
| Engineering Operator Run Comment |
| Resume power systems tests, then move onto mp 206 restart operation. /Wo |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:18:523PM |
| Author: To Be Determined |
| Session Leader Summary for Thurs. 990121 MP#206 Restart Operations 1999 SL wolfe PO marmar EO cochran The goal for today was to finish the power tests and begin plasma attempts. Given the lack of ECDC, the expectation was that only fizzles were likely, at best. These modest goals were accomplished. Power testing was completed, including hybrid control on all supplies (except EF3), on shot 12. One flash was obtained on shot 16. Spencer successfully opened the flappers. The EFCL rogowski signal is still dead. Apparently it wasn't the integrator. This signal is not essential for operation, but should be repaired ASAP. We played with thre null and gas pre-puff, but only got the one breakdown, which was somewhat late and had no appreciable current. The CII signal went to .012 mW/cm2/ster, compared to typically .002 in a clean machine. Shot 20 had an unexplained problem in that the hybrid drove OH2U to its current rail (30kA), apparently because it thought Br was too negative. The magnetics CAMAC failed on the same shot in a peculiar manner: trying to restore the data indicated the crate was offline. All signals digitized at the hybrid looked reasonable, no saturations or zeros or baseline drifts or jumps. We scratched our heads for a long time, and took a couple of test shots, none of which showed any problems. Then we took another full shot, starting from the programming of 19 and making the same change as was made for 20; this shot ran successfully as far as the OH supplies were concerned (though it was another dud). On shot 24 the EF4 supply failed very early, at around 200A. Shot 25 was a repeat, and EF4 didn't turn on at all. End of Run. 14 tests 10 duds (2 power supply failures) 1 fizzle 0 plasmas -- 25 shots |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:59:833PM |
| Author: To Be Determined |
| Physop Run Summary 990121 The goals for today were: Test various power supplies, and the pulsed gas, then try for plasma. The tests went well, and we attempted to get plasma on shot 13. Played with fields and gas, and got one fizzle (shot 16). Shot 20 had a mysterious magnetics/hybrid problem, which led to a mismatch between OH2U and OH2L. Ran several tests, and the problem did not repeat. 23 was a dud, and 24 and 25 had problems with EF4. See the logbook and session leader summary for details. |
| Session Leader Comments | |||
| Jan 21 1999 08:39:25:890AM | Steve Wolfe | Run Plan for Thurs, 990121 MP#206 Restart Operation 1999 SL wolfe PO marmar Engineering setup ----------------- Overnight ECDC in D2 (as much as possible) Gas setup: B-top 6psi D2 Hybrid enabled B-side lower ** 1psi Ar NOT enabled for 1st shot "K-side"* 30psi D2 Hybrid enabled * Note that this valve is physically on C-side now, but the PLC screen is not updated yet. ** If B-side lower is not ready for use, don't bother to fill the plenum The first part of the run will be devoted to power systems testing under the direction of the Engineering Power Systems crew (Cochran, et al.) Specifically, we need to complete the following tests: 1) OH commutation test at 5ka, all three coils, PLC control 2) EF1 commutation test at 5ka, both coils, PLC control 3) OH double swing test under HYBRID control, all three coils 4) EF1 double swing test under HYBRID control, both coils 5) EF4 double swing test under HYBRID control 6) EFCL test to check EFCL rogowski/integrator * 7) K-side gas puff test under HYBRID control * 8) TF test under HYBRID control * Tests 6 and 7 could be piggybacked on one or more of the other shots. The HYBRID programming for tests 3-8 is setup on PCS shot 990120019 Once the tests are completed, we will be ready to try for a flash. Power systems setup for plasma tests: --------------------------------------- PF as on 980220003 TF under hybrid control, current limit set at 160kA, timing as on 980220003 PCS setup as on 990120015 for first try. Start from there and tweak up until we get a flash or give up. If we get one, observe impurity signals, e.g. CII signal and Z-meter to assess cleanliness. Also observe RGA after shots. If not totally discouraged, try a limited number of shots for current rise. If it looks dirty (as expected) resume ECDC. | |
| Jan 21 1999 08:52:16:667AM | Steve Wolfe | Additions to the Power test part of the run plan: 9) EF2 and Chopper Test under hybrid control 10)Tuesday OH test (10kA no commutation, under PLC Control) | |
| Jan 21 1999 09:09:07:330AM | Steve Wolfe | Another change to the Power Tests: 2) EF1 commutation test at 3ka (not 5kA) The EF1 double swing test is also to be done at 3kA. | |
| Jan 21 1999 09:56:54:173AM | 990121001 | Steve Wolfe | Shot 1: OH Commutation test @5kA K-side gas hybrid enabled Base=1.3e-7 Very small pressure rise (onto the 6 scale only) Ratiomatic signal on shit shooter port shows 8e-6 rise, coming up late. Probably just needs exercising. Commutation test looks ok. |
| Jan 21 1999 10:14:48:650AM | 990121002 | Steve Wolfe | Shot 2: EF1 commutation test; turn on B-top valve as well as "K-side". Gas to the 5 scale Gas puffs look better. Comm test looks ok, but EF1U seems noisy. |
| Jan 21 1999 10:32:15:093AM | 990121003 | Steve Wolfe | Shot 3: HYBRID control on OH1,OH2U,OH2L; leave gas on. All went. OH2U has a lot of noise. It's out of phase with the demand. Oscillations are about 20msec period. OH1 is on the current rail in the positive swing. Retry it with lower gain on OH2U and L both. |
| Jan 21 1999 10:43:45:997AM | 990121004 | Steve Wolfe | Shot 4: Reduce OH2 gains to 2 from 4. Redraw positive swing of OH1 from 5000 to 4000A Oscillation still there on OH2U; it looks the same. OH1 flattops around 5000A ok this time (off the rail); there is an offset in the Hybrid bus signal Try a PLC shot on reverse bridge, which is where the oscillation happens. |
| Jan 21 1999 10:54:19:587AM | 990121005 | Steve Wolfe | Shot 5: PLC reverse bridge test at 6kA Similar behavior on OH2U at the current limit. Note it and move on. GAS gets to 2e-4 on ratiomatic, still seeing a lag. |
| Jan 21 1999 11:02:40:607AM | 990121006 | Steve Wolfe | Shot 6: EF1 hybrid double swing. Looks good, but the PLC limit was set at 3000 too, so it may have been on the rail! Do it again. |
| Jan 21 1999 11:09:19:290AM | 990121007 | Steve Wolfe | Shot 7: EF1 hybrid double swing with PLC limit at 4kA Looks good. |
| Jan 21 1999 11:21:23:493AM | 990121008 | Steve Wolfe | Shot 8: EF4 double swing under hybrid control. Only got to +1500A on reverse swing. Maybe the PLC limits got reversed. LImits were set as if coils were in series, and they are in parallel Need to set -4000, +8000 |
| Jan 21 1999 11:32:11:503AM | 990121009 | Steve Wolfe | Shot 9: re-do it with PLC limits moved. Looks good. Move along. |
| Jan 21 1999 11:45:32:147AM | 990121010 | Steve Wolfe | Shot 10: EF2 and EFc test under hybrid control. FD back to 0.08sec EF2 and EFC Supplies are ok, EFCL rogowski is dead. Next, do a Tuesday test. |
| Jan 21 1999 12:06:44:373PM | 990121011 | Steve Wolfe | Shot 11: Tuesday test, 10KA, no commutation, PLC control Looks ok, maybe a little excess noise on OH2U. |
| Jan 21 1999 12:18:59:853PM | 990121012 | Steve Wolfe | Shot 12: TF under hybrid control -150kA, PLC limit at 160kA. Looks just fine. Ready for plasma Spencer says flap opened |
| Jan 21 1999 12:35:20:333PM | 990121013 | Steve Wolfe | Shot 13: First try for plasma. Loaded from 990120015 (was 980220003) Dud Null looks terrible. BR too positive. Drop offset from .005 to .0025 Increase the gas puff while we're at it. |
| Jan 21 1999 12:49:36:973PM | 990121014 | Steve Wolfe | Shot 14: dud Null looks better. Raise the puff. |
| Jan 21 1999 01:03:33:837PM | 990121015 | Steve Wolfe | Shot 15: dud Radial field again, and Bz may be a bit positive. |
| Jan 21 1999 01:20:19:243PM | 990121016 | Steve Wolfe | Shot 16: IC_EF4 from -1330 -> -1345 BR_0 from .003 -> .002 OK, we got a fizzle, <30kA bd at 9msec, CII=.012mW/cm2/ster I think Br is a little positive, and Bz a little negative. Earl thinks it's a gas problem. |
| Jan 21 1999 01:30:47:937PM | 990121017 | Steve Wolfe | Shot 17: Added 2msec to pg4 dud |
| Jan 21 1999 01:44:00:477PM | 990121018 | Steve Wolfe | Shot 18: Add .5mT to Br dud |
| Jan 21 1999 01:57:53:333PM | 990121019 | Steve Wolfe | Shot 19: Put IC_EF4 back to -1330 from -1345 drop puff by 2msec dud |
| Jan 21 1999 02:50:27:750PM | 990121020 | Steve Wolfe | Shot 20: Br more positive by 1mT dud Bad Hybrid problem. It commanded very unbalanced currents in OH2's, apparently because it thought there was a big Br error. The magnetics also failed with a crate off-line error, which nobody can understand. I see no bad inputs on the hybrid. It must be something subtle. Time to test |
| Jan 21 1999 03:38:36:823PM | 990121021 | Steve Wolfe | Shot 21: OH1 only PLC 10KA test (no comm.) Can't see any magnetics problem. ?????????? |
| Jan 21 1999 03:54:10:177PM | 990121022 | Steve Wolfe | Shot 22: 15kA OH1 and OH2 only test (HYBRID), BR set = .0035 Seems ok. OH2U=-16200, OH2L=-14800, hybrid seems happy on both OH2U and BR_0 Try again. |
| Jan 21 1999 04:02:56:263PM | 990121023 | Steve Wolfe | Shot 23: Load from 19 and change Br from .0025 to .0035 (should be just like 20?) dud, but OH2 balance is ok. OH2U=-27600, OH2L=-26400 Too much Bz. maybe too positive on Br now too. Whatever it did on 20 did not repeat |
| Jan 21 1999 04:23:17:950PM | 990121024 | Steve Wolfe | Shot 24: Reduce IC_EF4 20A more negative. Dud - no ef4 after -.96sec |
| Jan 21 1999 04:49:43:070PM | 990121025 | Steve Wolfe | Shot 25: Try again No EF4. |
| Physics Operator Comments | |||
| Jan 21 1999 10:00:29:983AM | 990121001 | Earl Marmar | 990121 MP 206 1999 restart load from 990120019 OH commutation test hybrid enable on "k-side" to test PG-3 result: got a small puff; looks like valve opened a little late |
| Jan 21 1999 10:13:25:800AM | 990121002 | Earl Marmar | enable b-top prefill puff; EF1 commutation test result: got both gas puffs; still look delayed |
| Jan 21 1999 10:26:49:003AM | 990121003 | Earl Marmar | OH double swing test under HYBRID control; all 3 coils. more gas from "k-side" |
| Jan 21 1999 10:47:26:403AM | 990121004 | Earl Marmar | lower prop gain on OH2-U and OH2-L from 4 to 2 lower OH1 positive swing to 4 kA from 5 kA more gas from "k-side" |
| Jan 21 1999 10:55:46:873AM | 990121005 | Earl Marmar | OH test under PLC control some noise on OH2U "k-side" about the same as on shot 4 |
| Jan 21 1999 11:03:57:400AM | 990121006 | Earl Marmar | EF1 double swing test, HYBRID control, both coils. |
| Jan 21 1999 11:09:18:840AM | 990121007 | Earl Marmar | Retry EF1 test; raise PLC current limit |
| Jan 21 1999 11:20:56:273AM | 990121008 | Earl Marmar | EF4 double swing test, HYBRID control PLC limits positive swing to 1.5 kA; requested 3.0 Gas still reproducing well |
| Jan 21 1999 11:28:34:803AM | 990121009 | Earl Marmar | Retry EF4 test, with higher PLC limits |
| Jan 21 1999 11:44:26:670AM | 990121010 | Earl Marmar | EF2's under HYBRID control, plus EFC ("the chopper") |
| Jan 21 1999 12:07:12:023PM | 990121011 | Earl Marmar | 10 kA OH test; PLC control; no commutation ("Tuesday" test) |
| Jan 21 1999 12:18:42:347PM | 990121012 | Earl Marmar | 150 kA TF test |
| Jan 21 1999 12:35:12:290PM | 990121013 | Earl Marmar | first plasma attempt of 99 load from 990120015; 800 kA fiducial, based on 980220003 dud too much radial field |
| Jan 21 1999 12:51:22:167PM | 990121014 | Earl Marmar | reduce BR_0 offset to 2.5 mT from 5 mT increase prefill puff to 19 msec from 15 null looks better; dud |
| Jan 21 1999 01:04:41:353PM | 990121015 | Earl Marmar | Increase prepuff to 26 ms dud; a little too much BR, Bz |
| Jan 21 1999 01:19:40:767PM | 990121016 | Earl Marmar | BR_o offset to 2 mT make EF4's 15 Amp more negative fizzle break down at 9 ms fields don't look too bad |
| Jan 21 1999 01:30:06:577PM | 990121017 | Earl Marmar | add 2 msec to prepuff now 28 msec dud B_R slightly negative |
| Jan 21 1999 01:45:01:373PM | 990121018 | Earl Marmar | BR offset to 2.5 mT from 2.0 mT dud |
| Jan 21 1999 01:54:47:517PM | 990121019 | Earl Marmar | ef4 back to -1330 decrease prepuff to 26 ms dud B_R about 1 mT negative |
| Jan 21 1999 02:42:56:760PM | 990121020 | Earl Marmar | B_R offset to 3.5 mT from 2.5 mT dud problems with OH2 balance looks some kind of hybrid or magnetics problem also, no camac data from magnetics |
| Jan 21 1999 03:39:49:130PM | 990121021 | Earl Marmar | OH only, PLC control, to test magnetics looks ok |
| Jan 21 1999 03:51:48:713PM | 990121022 | Earl Marmar | OH test HyBRID control, 15 kA drawn for each coil looks ok |
| Jan 21 1999 04:02:25:150PM | 990121023 | Earl Marmar | Reload shot 19 B_R offset to 3.5 mT from 2.5 mT dud too much B_Z |
| Jan 21 1999 04:31:49:737PM | 990121024 | Earl Marmar | 20 amp more negative on EF4 dud EF4 died at -.95 seconds |
| Jan 21 1999 04:50:53:360PM | 990121025 | Earl Marmar | retry dud no EF4 |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:48:27:283AM | Test | Ok | oh1, oh2l,oh2u comm. test |
| 2 | 10:02:51:627AM | Test | Ok | ef1l,ef1u comm test |
| 3 | 10:18:31:880AM | Test | Ok | oh1,oh2u,oh2l double swing test |
| 4 | 10:34:22:727AM | Test | Ok | ripple on oh2 reverse bridge |
| 5 | 10:47:10:850AM | Test | Ok | oh1,oh2l,oh2u plc test |
| 6 | 10:59:37:713AM | Test | Ok | ef1u,ef1l double swing test |
| 7 | 11:06:10:450AM | Test | Ok | ef1l,ef1u double swing test |
| 8 | 11:14:35:777AM | Test | Ok | ef4 double swing test |
| 9 | 11:23:57:483AM | Test | Ok | ef4 double swing test |
| 10 | 11:38:29:597AM | Test | Ok | ef2,efc hybrid test |
| 11 | 12:02:04:130PM | Test | Ok | oh coax test shot |
| 12 | 12:13:31:440PM | Test | Ok | TF hybrid test |
| 13 | 12:28:31:033PM | Test | Ok | first plasma attempt |
| 14 | 12:42:42:590PM | Plasma | Ok | fizzle |
| 15 | 12:56:59:790PM | Plasma | Ok | fizzle |
| 16 | 01:10:04:960PM | Plasma | Ok | first plasma |
| 17 | 01:25:05:513PM | Plasma | Bad | fizzle |
| 18 | 01:37:04:320PM | Plasma | Bad | fizzle |
| 19 | 01:50:00:273PM | Plasma | Bad | fizzle |
| 20 | 02:03:48:987PM | Plasma | Ok | |
| 21 | 02:51:29:280PM | Test | Ok | oh1 only, 10ka, plc |
| 22 | 03:44:05:517PM | Test | Ok | oh1,oh2u,oh2l hybrid test |
| 23 | 03:57:15:853PM | Plasma | Ok | plasma shot , no plasma |
| 24 | 04:11:00:650PM | Plasma | Bad | ef4 inverts early |
| 25 | 04:47:48:323PM | Plasma | Bad | no ef4 |
| 26 | 06:02:08:217PM | Test | Ok | (null) |
| 27 | 06:13:27:903PM | Test | Ok | No Power EF4 Test Shot |
| 28 | 06:19:07:983PM | Test | Ok | (null) |
| 29 | 07:06:33:687PM | Test | Ok | No Power EF4 |
| 30 | 07:13:20:180PM | Test | Ok | No Power EF4 Test Shot |
| 31 | 07:28:36:227PM | Test | Ok | No Power EF4 Test |
| 32 | 07:34:13:973PM | Test | Bad | No Power EF4 Test |
| 33 | 07:40:39:767PM | Test | Ok | No Power Test EF4 |
| 34 | 07:50:19:470PM | Test | Ok | No Power EF4 Test |