Miniproposals

Miniproposal: 228 Date Filed: 1/15/1999 Title: Scrape-off Layer Transport Studies First Author: Brian Labombard Session Leader: Brian Labombard (shots 24-32)

Miniproposal: 236 Date Filed: 3/9/1999 Title: Edge Pedestal Assymetries with Reversed Field First Author: Robert Granetz Session Leader: Robert Granetz (shots 1-23)

Engineering Operator Run Comment

MP#236 Marmar/Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments
Nov 5 1999 03:10:22:090PM	991105024	Brian Labombard	Finally got a plasma! ASP and FSP scanning with plumes. Next shot go to 1.0 MA.
Nov 5 1999 03:29:01:327PM	991105025	Brian Labombard	No plasma Next shot go to ramped density: NL04=0.7 at 0.6 sec to NL04=1.3 at 1.2 seconds
Nov 5 1999 04:19:11:873PM	991105028	Brian Labombard	FSP and ASP firing with C2H4 plumes. Probes are a little too deep. Next shot: repeat, trying to get NL04=0.7 in initial phase

Physics Operator Comments
Nov 5 1999 08:42:08:373AM		Earl Marmar	Engineering setup for Friday, 991105: The run is scheduled to begin at 08:00 and end at 16:00. Overnight boronization with ECDC in boron/helium followed by pure helium, stopping at least 1 hour before the run. Power system setup as on 991104025 Note: Fizzle detector should be on from t=0.08 to 1.7 s; short delay for TF 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 2 psi of Ne Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is (pumped out) Hybrid DISABLED RF should plan on maximum available power from D port, on at 0.6 seconds, off at 1.0 second. The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV Physics operator's setup for Friday, 991105: MP 236 -- Lower x-point pedestal studies with reversed Bt Session leader: R. Granetz Physics operator: E. Marmar Engineering Operator: F. Silva Load Segment 1 from 991104025 Segment 2 from 991103005 (0.8 MA, 5.4 T, 1.0e20 m-2, lower x-point) After we establish a discharge, increase I_p towards 1.4 MA, decrease B_t to about 5.0 T, and decrease the density to about nl_04=0.9e20, in an attempt to get H-modes for pedestal asymmetry measurements. If RF induced H-modes cannot be obtained, we will also consider attempting to get ohmic H-modes by ramping the TF down as far as possible at Ip=1MA. After these attempts, the run will switch (by 11:30, at the latest) to MP#228 - SOL Transport with reversed Bt Session Leader: B. LaBombard
Nov 5 1999 08:44:41:390AM		Earl Marmar	Loaded 991103005 imported segment 1 from 991104025 Coldstart, no errors, all matrices respond;
Nov 5 1999 08:45:50:623AM		Earl Marmar	Overnight boronization: Date: 5-NOV-1999 07:20 From: NEL::IRBY Subj: Boronization Boronization deposited: approx 2034 Angstroms 2.5 hours of helium ECDC followed boronization
Nov 5 1999 09:10:43:607AM	991105001	Earl Marmar	Dud: no toroidal field
Nov 5 1999 09:24:37:140AM	991105002	Earl Marmar	Enable argon puff fizzle
Nov 5 1999 09:32:03:060AM	991105003	Earl Marmar	add 2 msec to prefill puff reduce B_R0 to -.001 from -.0005 fizzle
Nov 5 1999 09:53:51:403AM	991105004	Earl Marmar	reduce prepuff by 5 msec reduce B_R0 from -.001 to -.0015 fizzle
Nov 5 1999 09:59:16:577AM	991105005	Earl Marmar	add 10 amp to EF4 at -.03 s fizzle
Nov 5 1999 10:17:34:700AM	991105006	Earl Marmar	lower prepuff by 2 msec fizzle
Nov 5 1999 10:32:19:437AM	991105007	Earl Marmar	add 5 msec to prepuff reduce B_R0 from -.0015 to -.002 fizzle
Nov 5 1999 10:49:29:090AM	991105008	Earl Marmar	add 4 msec to prepuff; now at 28 msec plasma long hesitation before current rise 1 MW RF, nasty injections around 0.8 to 0.9 s
Nov 5 1999 11:00:15:280AM	991105009	Earl Marmar	program for 1.2 MA fizzle
Nov 5 1999 11:07:48:310AM	991105009	Robert Granetz	Shot 09 -- Fizzle. Granetz substitutes as physop for the next hour or so. Next shot: increase Br0 by 1 mT, decrease IC_EF4 by 10 amps.
Nov 5 1999 11:27:08:340AM	991105010	Robert Granetz	Shot 10 -- Fizzle. Null looks identical to yesterday. Leave the fields alone. Maybe last night's boronization requires much different fill pressure. Next shot: try decreasing fill pressure back to 24 ms. Also set Ip to 1.3 MA.
Nov 5 1999 12:04:18:937PM	991105011	Robert Granetz	Shot 11 -- Fizzle. Null looks good. Next shot: reduce fill pressure some more.
Nov 5 1999 12:04:32:390PM	991105012	Robert Granetz	Shot 12 -- Fizzle. Now try higher fill pressures. Next shot: increase fill pressure. Add 12 ms to gas valve.
Nov 5 1999 12:29:13:873PM	991105014	Earl Marmar	ECDC for 10 minutes in D_2 between shots 13 and 14 prepuff to 28 msec fizzle
Nov 5 1999 01:08:09:827PM	991105015	Earl Marmar	ECDC for 10 minutes before shot 15 prepuff to 23 msec EF4 increased 20 amps to 1430 at -.03 s fizzle
Nov 5 1999 01:08:34:187PM	991105016	Earl Marmar	ECDC for 5 minutes before shot no PCS changes fizzle
Nov 5 1999 01:26:47:717PM	991105017	Earl Marmar	no ECDC before shot 17 prepuff to 20 msec fizzle
Nov 5 1999 01:37:42:000PM	991105018	Earl Marmar	add -20 V to OH1 at .007, .008, .015 s add -4 V to OH2's at similar times fizzle
Nov 5 1999 01:59:13:280PM	991105019	Earl Marmar	Reduce EF3 early voltage preprog (between 5 and 20 msec) fizzle
Nov 5 1999 02:15:54:500PM	991105020	Earl Marmar	reload segment 1 from shot 8 fizzle - hardly a bit of current
Nov 5 1999 02:28:00:640PM	991105021	Earl Marmar	Shot 021 change RCUR offset to -7000 (from -8000) in segment 1 lower PG4 to 18ms (from 27ms) fizzle - more current than 020 - tried to go a second time Bz ramp is slowed down by the RCUR offset change
Nov 5 1999 02:41:16:780PM	991105022	Earl Marmar	022 RCUR offset = -6000 in segment 1 PG4 = 21ms fizzle pretty awful
Nov 5 1999 02:58:14:077PM	991105023	Earl Marmar	023 RCUR offset = -6500 in segment 1 BR_0 offset = -.0005 in segment 1 fizzle
Nov 5 1999 03:12:35:513PM	991105024	Earl Marmar	reload shot 8 entirely prepuff to 16 msec plasma
Nov 5 1999 03:23:36:903PM	991105025	Earl Marmar	I_p to 1 MA fizzle
Nov 5 1999 03:44:03:547PM	991105026	Earl Marmar	program density scan from 0.7 to 1.2 e20 nl_04 reduce prepuff to 14 msec fizzle
Nov 5 1999 04:02:00:670PM	991105027	Earl Marmar	prepuff to 16 msec fizzle
Nov 5 1999 04:15:12:217PM	991105028	Earl Marmar	delay pules_gas3 turnon by 11 msec plasma
Nov 5 1999 04:33:11:530PM	991105029	Earl Marmar	prepuff to 14 ms fizzle
Nov 5 1999 04:42:05:937PM	991105030	Earl Marmar	raise prepuff to 16 msec I_p program to 1.4 MA nl_04 prog to .9e20 RF requested fizzle
Nov 5 1999 04:57:32:780PM	991105031	Earl Marmar	no PCS changes fizzle
Nov 5 1999 05:08:22:903PM	991105032	Earl Marmar	B_R0 offset to -.001 from -.002 fizzle

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:07:22:670AM	Plasma	Bad	TF not enabled
2	09:17:21:140AM	Plasma	Ok	no faults/fizzel
3	09:30:26:607AM	Plasma	Ok	no faults/fizzel
4	09:43:56:547AM	Plasma	Ok	fizzle
5	09:57:26:513AM	Plasma	Ok	(null)
6	10:11:05:547AM	Plasma	Ok	(null)
7	10:24:31:420AM	Plasma	Ok	(null)
8	10:39:39:390AM	Plasma	Ok	(null)
9	10:57:49:200AM	Plasma	Ok	(null)
10	11:11:51:357AM	Plasma	Ok	(null)
11	11:29:00:483AM	Plasma	Ok	(null)
12	11:43:33:233AM	Plasma	Ok	(null)
13	12:01:31:827PM	Plasma	Ok	(null)
14	12:26:03:480PM	Plasma	Ok	(null)
15	12:48:27:700PM	Plasma	Ok	(null)
16	01:03:36:763PM	Plasma	Ok	(null)
17	01:19:44:013PM	Plasma	Ok	(null)
18	01:35:40:827PM	Plasma	Ok	(null)
19	01:54:05:560PM	Plasma	Ok	(null)
20	02:07:00:967PM	Plasma	Ok	(null)
21	02:19:52:500PM	Plasma	Ok	(null)
22	02:33:48:060PM	Plasma	Ok	(null)
23	02:48:50:047PM	Plasma	Ok	(null)
24	03:03:30:530PM	Plasma	Ok	(null)
25	03:22:25:013PM	Plasma	Ok	(null)
26	03:36:38:950PM	Plasma	Ok	(null)
27	03:51:54:327PM	Plasma	Ok	(null)
28	04:06:50:873PM	Plasma	Ok	(null)
29	04:26:27:653PM	Plasma	Ok	(null)
30	04:39:30:297PM	Plasma	Ok	(null)
31	04:52:50:500PM	Plasma	Ok	(null)
32	05:05:44:590PM	Plasma	Ok	(null)