Entry display output on Wed Aug 26 15:42:18 2009 ---------------------------------------------------------------------------- 1080523001 snipes PHYSICS_OPERATOR May 23 2008 9:25:35:623AM . . . . . . . . . . . . . . . . . . . . Shot 1: Copied shot 1080318029 for beam into gas shots with EF4 open and gate valves closed to keep the torus pressure as constant as possible. DNB gate valve is open. All other fields should fire. TF crowbar. TF Ground Fault Above Trip Level *** Max Current: 100.002 . Possible TF ground fault. ---------------------------------------------------------------------------- 1080523002 snipes PHYSICS_OPERATOR May 23 2008 10:13:39:630AM . . . . . . . . . . . . . . . . . . . . Shot 2: TF test. OK. ---------------------------------------------------------------------------- 1080523003 snipes PHYSICS_OPERATOR May 23 2008 10:32:20:753AM . . . . . . . . . . . . . . . . . . . . Shot 3: Return to the experimental program. Repeat shot 1 without the TF ground fault. OK. ---------------------------------------------------------------------------- 1080523004 snipes PHYSICS_OPERATOR May 23 2008 10:45:22:106AM . . . . . . . . . . . . . . . . . . . . Shot 4: Gas without fields. OK. ---------------------------------------------------------------------------- 1080523005 snipes PHYSICS_OPERATOR May 23 2008 10:51:55:893AM . . . . . . . . . . . . . . . . . . . . Shot 5: Repeat gas without fields. OK. ---------------------------------------------------------------------------- 1080523006 snipes PHYSICS_OPERATOR May 23 2008 11:17:50:720AM . . . . . . . . . . . . . . . . . . . . Shot 6: Return to gas and EF3 and TF. Reduced EF3 and TF flattops to start rampdown at 1.2 s. OK. ---------------------------------------------------------------------------- 1080523007 snipes PHYSICS_OPERATOR May 23 2008 11:17:59:093AM . . . . . . . . . . . . . . . . . . . . Shot 7: Repeat gas, EF3, and TF. OK. ---------------------------------------------------------------------------- 1080523008 snipes PHYSICS_OPERATOR May 23 2008 11:36:01:180AM . . . . . . . . . . . . . . . . . . . . Shot 8: Starting beam into plasma part of the experiment. Copied shot 1080312004. Engineers changed settings also for this shot. Very low density with lots of runaways. TCI has a fringe jump at 0.25 s that shut off the gas even though the density was really very low. ---------------------------------------------------------------------------- 1080523009 snipes PHYSICS_OPERATOR May 23 2008 11:57:07:430AM . . . . . . . . . . . . . . . . . . . . Shot 9: Try again with the TCI working properly. Runaways starting at 0.03 s and continuing until at least 0.8 s. Plasma ramped all the way down. ---------------------------------------------------------------------------- 1080523010 snipes PHYSICS_OPERATOR May 23 2008 12:09:37:846PM . . . . . . . . . . . . . . . . . . . . Shot 10: Raised nl04 to 7 x 10^19 m^-2. Some runaways early but then a good shot as the density increased. Startup bounced. ---------------------------------------------------------------------------- 1080523011 snipes PHYSICS_OPERATOR May 23 2008 12:19:33:040PM . . . . . . . . . . . . . . . . . . . . Shot 11: Raised prepuff by 2 ms to 29 ms duration to try to get rid of the early runaways. Good shot. ---------------------------------------------------------------------------- 1080523012 snipes PHYSICS_OPERATOR May 23 2008 12:38:04:086PM . . . . . . . . . . . . . . . . . . . . Shot 12: Repeat. Good shot but we did still get some runaways early. Startup bounced. ---------------------------------------------------------------------------- 1080523013 snipes PHYSICS_OPERATOR May 23 2008 12:48:48:093PM . . . . . . . . . . . . . . . . . . . . Shot 13: Loaded shot /home/snipes/trees/ 1080523000 which is an extended flattop version of shot 1080422013. Changed the prepuff to 30 ms duration. nl04 is set to 7 x 10^19 m^-2. ICRF from E-port only from 0.7 to 1.4 s. Good shot with 1.25 MW of ICRF and three H-modes. ---------------------------------------------------------------------------- 1080523014 snipes PHYSICS_OPERATOR May 23 2008 1:10:12:503PM . . . . . . . . . . . . . . . . . . . . Shot 14: Repeat. Good shot. One good long H-mode from 0.82 s to 1.33 s with ICRF up to 2.4 MW from D and E. ---------------------------------------------------------------------------- 1080523015 snipes PHYSICS_OPERATOR May 23 2008 1:19:13:010PM . . . . . . . . . . . . . . . . . . . . Shot 15: Changed A-coil off time from 2.0 to 2.5 s. Disrupted at 0.44 s. Mode locks just before the disruption, which was probably the result of an impurity injection. ---------------------------------------------------------------------------- 1080523015 snipes PHYSICS_OPERATOR May 23 2008 1:23:59:386PM . . . . . . . . . . . . . . . . . . . . There is a brief delay to check fuses after that disruption. ---------------------------------------------------------------------------- 1080523016 snipes PHYSICS_OPERATOR May 23 2008 1:30:34:330PM . . . . . . . . . . . . . . . . . . . . Shot 16: Changed all of the other coil invert times to 2.5 s except for the TF which is at 3.0 s. Fizzle detector off time also changed to 2.5 s. Good shot. ---------------------------------------------------------------------------- 1080523016 snipes PHYSICS_OPERATOR May 23 2008 1:32:35:880PM . . . . . . . . . . . . . . . . . . . . Shot 16: Changed all of the other coil invert times to 2.5 s except for the TF which is at 3.0 s. Fizzle detector off time also changed to 2.5 s. Good shot with a nice long EDA H-mode from 0.82 to 1.34 s. ---------------------------------------------------------------------------- 1080523016 snipes PHYSICS_OPERATOR May 23 2008 1:40:02:070PM . . . . . . . . . . . . . . . . . . . . Cell access to move the LH grill in toward the plasma. ---------------------------------------------------------------------------- 1080523017 snipes PHYSICS_OPERATOR May 23 2008 2:15:45:756PM . . . . . . . . . . . . . . . . . . . . Shot 17: Copied shot 1080306020 and then reloaded segment 1 from shot 16. This is a 0.6 MA, 5.4 T, DN plasma. Engineering settings also changed for this shot. This shot will have LH and ICRF. Good shot but no H-mode with 1.5 MW of ICRF and 0.5 MW of LH. ---------------------------------------------------------------------------- 1080523018 snipes PHYSICS_OPERATOR May 23 2008 2:29:25:516PM . . . . . . . . . . . . . . . . . . . . Shot 18: Set ZCUR to -0.014 m until 1.5 s to stay in lower null to get H-modes. Got several H-modes. Good shot. ---------------------------------------------------------------------------- 1080523019 snipes PHYSICS_OPERATOR May 23 2008 2:44:19:213PM . . . . . . . . . . . . . . . . . . . . Shot 19: Increased CLEARIN from 0.003 to 0.007 from 0.65 to 1.5 s to increase the outer gap for the LH. Fizzle. ---------------------------------------------------------------------------- 1080523020 snipes PHYSICS_OPERATOR May 23 2008 2:59:21:100PM . . . . . . . . . . . . . . . . . . . . Shot 20: Reduced prepuff by 5 ms to 25 ms duration. Good shot. Got a Li pellet at 1.65 s. ---------------------------------------------------------------------------- 1080523021 snipes PHYSICS_OPERATOR May 23 2008 3:11:40:236PM . . . . . . . . . . . . . . . . . . . . Shot 21: Repeat. Good shot. ---------------------------------------------------------------------------- 1080523022 snipes PHYSICS_OPERATOR May 23 2008 3:29:00:530PM . . . . . . . . . . . . . . . . . . . . Shot 22: Reduced flattop of the TF current to start rampdown at 1.5 s instead of 2.1 s. Good shot. Nice long H-mode from 0.68 to 1.5 s. ---------------------------------------------------------------------------- 1080523023 snipes PHYSICS_OPERATOR May 23 2008 3:39:53:210PM . . . . . . . . . . . . . . . . . . . . Shot 23: Repeat. Fizzle! ---------------------------------------------------------------------------- 1080523024 snipes PHYSICS_OPERATOR May 23 2008 3:54:37:380PM . . . . . . . . . . . . . . . . . . . . Shot 24: Reduced prepuff by 2 ms to 23 ms duration. Disrupted at 1.68 s after a Li pellet. Got one long and one short H-mode. ---------------------------------------------------------------------------- 1080523025 snipes PHYSICS_OPERATOR May 23 2008 4:14:32:706PM . . . . . . . . . . . . . . . . . . . . Shot 25: Reduced prepuff by 2 ms to 21 ms duration. Good shot with a nice long H-mode. ---------------------------------------------------------------------------- 1080523026 snipes PHYSICS_OPERATOR May 23 2008 4:22:16:650PM . . . . . . . . . . . . . . . . . . . . Shot 26: Repeat. Good shot with a nice long H-mode. ---------------------------------------------------------------------------- 1080523027 snipes PHYSICS_OPERATOR May 23 2008 4:39:54:366PM . . . . . . . . . . . . . . . . . . . . Shot 27: Reloaded shot 1080522026 which is a 7 T shot with TF current at 194 kA. Set nl04 to 5 x 10^19 m^-2 until 0.7 s then ramping up to 1 x 10^20 m^-2 at 1.3 s. Reduced prepuff to 21 ms duration. Li pellets at 1.5 and 1.65 s. Good shot. Disrupted after the second pellet in rampdown. ---------------------------------------------------------------------------- 1080523028 snipes PHYSICS_OPERATOR May 23 2008 4:52:05:470PM . . . . . . . . . . . . . . . . . . . . Shot 28: Reloaded shot 3 from today. Asked the engineers to also reload shot 3. This is a beam into gas shot with only gas, TF, and EF3 and with EF4 open. OK. ---------------------------------------------------------------------------- 1080523030 snipes PO_PLAN May 23 2008 5:24:40:040PM . . . . . . . . . . . . . . . . . . . . The run started off with a TF ground fault after the first shot. The ground fault cleared but it resulted in a 45 minute delay in the experimental program. Shot 2 was a TF test that went fine. The program continued with DNB into gas test shots with TF and EF3 and with EF4 open. Then, shots 8 to 27 were plasma attempts of which there were two fizzles and 18 plasmas. The machine ran pretty well with only one early disruption. The ICRF and LH worked well and even ran simultaneously. A number of long H-modes were obtained. The MSE calibration I believe went well. See the Session Leader summary for the details. Finally, for shot 27, we ran a 7 T shot for Greg Wallace to finish off his thesis work. This shot and the last several shots were run without TF cooling to warm up the TF magnet to separate it from the cylinder to make it easier to remove the TF arms. There were 30 shots, 18 plasmas, 10 tests, and 2 fizzles. This ends the run campaign for 2008 and begins the long shutdown to inspect the TF joints. Physics operation is expected to resume approximately one year from now. Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result | 01 0.000 0.040 Test | 02 0.000 0.004 Test | | 03 0.000 0.040 Test | 04 0.000 0.002 Test | | 05 0.000 0.002 Test | 06 0.000 0.040 Test | | 07 0.000 0.040 Test | 08 1.973 0.771 Plasma | | 09 1.971 0.768 Plasma | 10 1.970 0.760 Plasma | | 11 1.972 0.764 Plasma | 12 1.968 0.762 Plasma | | 13 2.020 0.772 Plasma | 14 2.030 0.777 Plasma | | 15 0.446 0.759 Plasma | 16 2.300 0.782 Plasma | | 17 1.974 0.703 Plasma | 18 1.972 0.701 Plasma | | 19 0.000 0.037 Fizzle | 20 1.973 0.713 Plasma | | 21 1.972 0.717 Plasma | 22 1.970 0.699 Plasma | | 23 0.000 0.042 Fizzle | 24 1.686 0.710 Plasma | | 25 1.970 0.716 Plasma | 26 1.968 0.713 Plasma | | 27 1.695 0.834 Plasma | 28 0.000 0.043 Test | | 29 0.000 0.004 Test | 30 0.000 0.004 Test | Date 1080523: 30 shots. 18 plasmas. 2 fizzles. 10 tests. 0 System Error. (Plasma = Ip gt 60.0 kA Dud = H_alpha lt 0.40 V) Total plasma duration: 33.83 s (exceeding -100 kA) ---------------------------------------------------------------------------- 1080523xxx snipes PO_PLAN May 22 2008 2:42:18:270PM . . . . . . . . . . . . . . . . . . . . PhysOp plan for 1080523, Friday May 23, 2008 Purpose MP 554 MSE Calibrations with and without long pulse Ohmic and ICRF plasmas Session Leader: Jinseok Ko Physics Operator: Joseph Snipes ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1080318029 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) leave NINJA as is DISABLED Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): no ICRF(yes/no): yes, would like high power, but J-port is out of action LH(yes/no): yes DNB(yes/no): yes Cryopump (yes/no): no Vessel temperature: 35/35/35 *** Keep magnet cooling on as if we were pulsing throughout the night *** Want to maintain a constant vessel temperature throughout the run if possible. *** No ECDC overnight or before the run and no boronization *** Run plan: First we will have about 8 shots with and without poloidal and toroidal fields but with gas for beam-into-gas calibration shots. Then, we will move to plasma shots starting from 1080312004 (Ohmic) with flattop to 1.5 s. Then, we will go to ICRF heated plasmas starting from 1080422013 but extending the flattop to 1.8 s with ICRF from 0.5 s to 1.5 s. Then, we will go to ICRF+LH starting from shot 1080306020 but using E-port rather than J-port since it is out of action. See the Session Leader run plan for more details.