| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| MP 214 Granetz/Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:02:350PM |
| Author: To Be Determined |
| Physics operator summary for run 990716: MP 214 -- RF conditioning SL: Dr. Wukitch, I presume? PO: R. Granetz The goal for today: Re-establish plasma operation and condition the ICRF. Summary: After several hours of power supply work, we finally began trying for plasmas with all supplies on shot 5. A number of tweaks to Br0, Bz0, and pre-fill pressure finally produced a nice plasma on shot 10. Throughout the day, we had to let the alternator spin down in order to keep it from overheating, due to the warmth of the Charles River cooling water. This greatly slowed down the shot rep rate. By early afternoon, the alternator house was so warm that we had to shut down the run early. Scorecard: 1 plasmas 1 fizzles 6 duds (2 due to lack of one or more power supplies) 2 tests 0 aborted ---------- 10 total ------------------------------------------------------------------------------ Engineering Setup for Friday, 990716: Load from 990526005 (0.8 MA, 1.4 s long flattop, nl_04=1.0e20 m-2) Overnight ECDC in D2 prior to run, stopping in time to begin run at 09:00 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 6 psi of H2 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 ------------------------------------------------------------------------------- Run Plan for 990716: MP 214 -- RF conditioning SL: Dr. Wukitch, I presume? PO: R. Granetz Start by loading 990526005, an 0.8 MA, long flattop shot from the last week of operation. Optimise vertical position for RF balance. ------------------------------------------------------------------------------ Note: overnight ECDC in D2 was done prior to this run. Hybrid coldstart done; no errors found ($set default cmod$models:[hybrid.tcl] $@hybinit_dispatch $@show_bitbus_log Use editor search to verify no occurrences of "error" nor "not respond") Load 990526005. Shot 01 -- EF2L test. Still has the same problem as yesterday. There was a delay of about 1.5 hours after shot 1 to fix EF2L Shot 02 -- Another EF2L test, at 1.7 kA. Looks good. Next shot: bring alternator to speed and then try for plasma. Shot 03 -- Dud. Only EF2L was enabled. Engineering error. Next shot: try for plasma Shot 04 -- Dud. No EF4. Next shot: try again Shot 05 -- Dud. All supplies worked. Br0= -4 mT. Next shot: increase BR_0 offset from 0.002 to 0.006 T Shot 06 -- Dud. Null looked pretty good. Gas pressure is also normal. Don't understand why we didn't even get a flash. Next shot: reduce pre-fill pulse from 20 to 16 ms. Shot 07 -- Dud. Next shot: add 1 mT to Br offset, and increase pre-fill pulse from 16 to 24 ms. Shot 08 -- Fizzle. Doesn't look like it hit anything. Next shot: increase Bz a tiny amount (-1275 --> -1260 amps on EF4), and decrease pre-fill pulse by 1 ms (to 23 ms) Shot 09 -- Dud. Perhaps too much Bz. Next shot: reduce Bz (-1260 amps --> -1285 amps on IC_EF4) Shot 10 -- Plasma. Good long shot. Ip=0.8 MA, Bt=5.4 T, nl_04=1.0e20 m-2, flattop to t=1.4 s. Ramped all the way down. Terminated at 1.84 s. Prf=3 kW. H/D=3%. Outer gap=1.6 cm. Run ended early due to high temperatures in the alternator house (because the Charles River cooling water is too warm). |
| Session Leader Comments |
| Physics Operator Comments | |||
| Jul 16 1999 09:18:52:340AM | Robert Granetz | Engineering Setup for Friday, 990716: Load from 990526005 (0.8 MA, 1.4 s long flattop, nl_04=1.0e20 m-2) Overnight ECDC in D2 prior to run, stopping in time to begin run at 09:00 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 6 psi of H2 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 | |
| Jul 16 1999 09:19:06:327AM | Robert Granetz | Run Plan for 990716: MP 214 -- RF conditioning SL: Dr. Wukitch, I presume? PO: R. Granetz Start by loading 990526005, an 0.8 MA, long flattop shot from the last week of operation. Optimise vertical position for RF balance. | |
| Jul 16 1999 09:19:44:793AM | Robert Granetz | Note: overnight ECDC in D2 was done prior to this run. Hybrid coldstart done; no errors found ($set default cmod$models:[hybrid.tcl] $@hybinit_dispatch $@show_bitbus_log Use editor search to verify no occurrences of "error" nor "not respond") Load 990526005. | |
| Jul 16 1999 11:12:46:187AM | 990716001 | Robert Granetz | Shot 01 -- EF2L test. Still has the same problem as yesterday. There was a delay of about 1.5 hours after shot 1 to fix EF2L |
| Jul 16 1999 11:13:01:060AM | 990716002 | Robert Granetz | Shot 02 -- Another EF2L test, at 1.7 kA. Looks good. Next shot: bring alternator to speed and then try for plasma. |
| Jul 16 1999 11:23:02:077AM | 990716003 | Robert Granetz | Shot 03 -- Dud. Only EF2L was enabled. Engineering error. Next shot: try for plasma |
| Jul 16 1999 11:31:09:013AM | 990716004 | Robert Granetz | Shot 04 -- Dud. No EF4. Next shot: try again |
| Jul 16 1999 11:58:20:890AM | 990716005 | Robert Granetz | Shot 05 -- Dud. All supplies worked. Br0= -4 mT. Next shot: increase BR_0 offset from 0.002 to 0.006 T |
| Jul 16 1999 12:22:55:920PM | 990716006 | Robert Granetz | Shot 06 -- Dud. Null looked pretty good. Gas pressure is also normal. Don't understand why we didn't even get a flash. Next shot: reduce pre-fill pulse from 20 to 16 ms. |
| Jul 16 1999 12:51:49:733PM | 990716007 | Robert Granetz | Shot 07 -- Dud. Next shot: add 1 mT to Br offset, and increase pre-fill pulse from 16 to 24 ms. |
| Jul 16 1999 01:25:23:873PM | 990716008 | Robert Granetz | Shot 08 -- Fizzle. Doesn't look like it hit anything. Next shot: increase Bz a tiny amount (-1275 --> -1260 amps on EF4), and decrease pre-fill pulse by 1 ms (to 23 ms) |
| Jul 16 1999 01:37:06:170PM | 990716009 | Robert Granetz | Shot 09 -- Dud. Perhaps too much Bz. Next shot: reduce Bz (-1260 amps --> -1285 amps on IC_EF4) |
| Jul 20 1999 01:18:36:840PM | 990716010 | Robert Granetz | Shot 10 -- Plasma. Good long shot. Ip=0.8 MA, Bt=5.4 T, nl_04=1.0e20 m-2, flattop to t=1.4 s. Ramped all the way down. Terminated at 1.84 s. Prf=3 kW. H/D=3%. Outer gap=1.6 cm. Run ended early due to high temperatures in the alternator house (because the Charles River cooling water is too warm). |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:32:51:340AM | Test | Bad | EF2 lower test bad. single phase |
| 2 | 11:03:11:013AM | Test | Ok | ef2 lower test improved |
| 3 | 11:19:16:873AM | Test | Ok | ef2 test, hybrid control |
| 4 | 11:27:13:123AM | Test | Bad | no ef4 |
| 5 | 11:52:32:327AM | Plasma | Ok | no faults, ef4 ok |
| 6 | 12:13:26:170PM | Plasma | Ok | no faults |
| 7 | 12:46:11:217PM | Plasma | Ok | no faults |
| 8 | 01:08:17:390PM | Plasma | Ok | no faults/fizzel |
| 9 | 01:31:39:500PM | Plasma | Ok | no faults |
| 10 | 01:52:27:343PM | Test | Ok | No Faults/Plamsa |