Miniproposals

Miniproposal: 214 Date Filed: 1/5/1999 Title: D and E-port RF System Commissioning First Author: Steve Wukitch Session Leader: Steve Wukitch (shots 1-24) Session Leader: Gerd Schilling (shots 1-24)

Miniproposal: 241 Date Filed: 3/1/1999 Title: Impurity Concentrations in EDA H-mode Plasmas First Author: Jim Terry Session Leader: Jim Terry (shots 1-24)

Engineering Operator Run Comment

MP#214/Marmer, Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:21:083PM

Author: To Be Determined

Session Leader's summary of run 990914 MP#241 - "Impurity Concentrations in EDA H-Mode Plasmas" Physics Operator: Earl Marmar Session Leader: Jim Terry The primary goal of this mini-proposal was to measure the impurity concentrations in EDA H-mode plasmas. The concentrations were measured using passive x-ray and VUV spectroscopy. This run was carried out immediately after a boronization and the plasmas were extremely clean relative to pre-boronization levels. Z_eff (Z_70_yag) was 1.2-1.25. The E and D antennas were used for auxiliary heating. RF powers varied from 0.9 to 2.2 MW. EDA H-modes were achieved on all full-length plasmas after shot 006. The H-factor was typically 1.6. During the EDA H-mode phase, the radiated power as measured by the 2pi foil bolometer typically increased from 400 to 950 kW, while the power as measured by the 2pi diode bolometer increased from 50 to 250 kW. (This was for input powers of ~2.6 MW.) Ar was puffed except on shots 015 and 016 and accounts of ~20% of the radiated power increase during H-mode. If we take the foil and diode bolometers at face value, then ~300 kW (55%) of the power loss brought about by EDA is from neutrals, while 80-100 kW (20%) is from Ar. The rest (100-150 kW) is probably accounted for by B and F. This requires further quantitative analysis. The run was successful in accomplishing the following goals: 1) reproducible, clean EDA H-modes with moderate confinement were obtained, 2) the following impurities were measured Ar (x-ray and VUV) B (H-like and Li-like) F (recombination on fully stripped and Li-like) C (Li-like) O (Li-like) Mo (Na-like and Ne-like) Fe (Na-like) 3) these plasmas were quite clean - Zeff was 1.22 typically - there was very little Mo, C, and O. - nitrogen levels were too small to be observed. Setup: Toroidal Field: 5.4 T (with a B_t jog on some shots) Plasma Current: 1.0 MA Working gas species: D2 A detailed accounting follows: 001 test 002 no H-mode 003 no H-mode 004 some dithers, but no H-mode 005 H-mode, probably EDA from .96 to 1.12 006 ELM-free H-mode from 0.69 to 0.86 s 007 good EDA from 0.707 to 1.355 s - RF at 1.9 MW - H-factor 1.68 - looked at midplane Ly_a, Li-like N (not seen) 008 good EDA from 0.717 to 1.338 s - RF drops from 2 to 1 MW at 0.758 s - H-factor 1.58 - looked at midplane HeII, Li-like Ar, Na-like Fe, Na-like Ni(not seen), Li-like Ti (not seen) 009 fizzle 010 good EDA from 0.69 to 1.344 s, RF drops from 1.8 to 1 MW at 0.713 s - looked at H-like B at Z=-26 cm 011 good EDA from 0.69 to 1.36 s, RF drops from 1.8 to 1 MW at 0.747 s - looked at H-like C and Ar lines at Z=-26 cm 012 good EDA from 0.712 to 1.32 s, RF at 1.72 MW - H-factor 1.7 - looked at H-like N (not seen) and Ar lines at Z=-26 cm 013 good EDA from 0.706 to 1.31 s, RF at 1.76 MW - H-factor 1.67, then dropping - looked at midplane H-like N (not seen) and Na-like Mo 014 good EDA from 0.70 to 1.305 s, RF at 1.77 MW - H-factor 1.65, then dropping - McPherson detector tripped 015 good EDA from 0.70 to 1.31 s, RF at 1.76 MW - H-factor 1.7, then dropping to 1.42 - turned the Ar OFF - looked at midplane Be-like Ar, H-like B 016 good EDA from 0.69 to 1.41 s, RF at 1.70 MW - H-factor 1.64 - Ar OFF - looked at midplane HeII, Li-like Ar, Na-like Fe 017 dud 018 good EDA from 0.69 to 1.5 s, RF at 1.75 MW - H-factor 1.65, dropping to 1.52 - Ar ON - looked at Li-like F at Z=-27 cm 019 good EDA from 0.69 to ~1.42 s, RF dropping from 1.75 to .92 MW at 0.74 s - H-factor 1.56 - Ar ON - looked at CII (1335 A) and BI (1362 A) for C/B source comparison Z=-27 cm 020 good EDA from 0.76 to 1.42 s, RF only at 0.96 MW - H-factor 1.57 - Ar ON - looked at CII and BI at Z=-27 cm 021 good EDA from 0.76 to ~1.43 s, RF at 1.75 MW - H-factor 1.60 - Ar ON - looked at Li-like C at Z=-27 cm - also saw strong BII - 1624 A line 022 good EDA from 0.695 to ~1.42 s, RF drops from 1.72 to 1 MW at .9 - H-factor 1.53 - Ar ON 023 good EDA from 0.68 to ~1.41 s, RF at 1.65 MW - H-factor 1.53 - Ar ON 024 good EDA from 0.69 to ~1.41 s, RF at 1.75 MW - Ar ON - Chromex to 486. nm for cross calibration with McPherson

Physics Operator Summaries

Entered: Jul 7 2004 04:37:09:270PM

Author: To Be Determined

Physics Operator Run Summary 990914 MP#214 ICRF Conditioning SL: Wukitch/Schilling MP#241 EDA Impurities SL: Terry PO: Marmar EO: Silva/Dekow Plan: Start (after Tuesday OH test) with standard 1MA, 5.4T plasma (like 990908004, but at slightly higher toroidal field). Bring up the power on the D and E port RF systems, until we achieve reproducible EDA H-Modes with total RF power exceeding 2 MW. If this is successful, turn the run over to MP#241 EDA Impurities with Jim Terry as shot leader. Engineering setup: *** Boronization, followed by Helium ECDC until approximately 6:00 am. No deuterium ECDC before the run. *** Setup power supplies from 990908004 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled 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. We boronized last night, 9/13, and used 114 psi of diborane for an average deposition of 1667 Angstroms. Boronization was followed by 4.25 hours of helium ECDC at 5e-5 Torr. The ECDC resonance was scanned to the outer wall. Results: This was a successful run. Impurity and radiated power levels were low, and every plasma after shot 5 went into EDA H-Mode. There were occasional impurity injections, but nothing that caused any problems. The RF ran reliably, typically at 1.7 MW total out of transmitters 1 and 2, with relatively few trips. There were also a number of shots with RF power ramps up to 2.3 MW. H-factors were reportedly in the vicinity of 1.6, with neutron rates above 1e13/s. The run was shifted to MP241 starting with shot 7. Startup was reliable, with no problems following the boronization. Shot 9 was a fizzle. A 15 amp increase in the EF4 preprogram before breakdown was implemented for shot 10, and there were no further startup problems. All plasmas that got past 60 kA ran full length. Problems: Shot 11 suffered a magnetics TRAQ3 timing problem; data were recovered out to 1.3 seconds. Shot 17 was a dud, with various power supplies missing in action, including the TF. There was a data system hang before shot 24, which caused a minor delay. Scorecard: 21 plasmas 1 OH test 1 Power supply dud 1 fizzle ________ 24 data system cycles

Session Leader Comments
Sep 14 1999 02:43:19:170PM	990914007	Jim Terry	good EDA from 0.707 to 1.355 s - RF at 1.9 MW - looked at midplane Ly_a, Li-like N (not seen)
Sep 14 1999 02:44:09:123PM	990914008	Jim Terry	good EDA from 0.717 to 1.338 s - RF drops from 2 to 1 MW at 0.758 s - looked at midplane HeII, Li-like Ar, Na-like Fe, Na-like Ni(not seen), Li-like Ti (not seen)
Sep 14 1999 02:41:01:857PM	990914010	Jim Terry	good EDA from 0.69 to 1.344 s, RF drops from 2 to 1 MW at 0.713 s - looked at H-like B at Z=-26 cm
Sep 14 1999 02:51:09:437PM	990914011	Jim Terry	good EDA from 0.69 to 1.36 s, RF drops from 2 to 1 MW at 0.747 s - looked at H-like C and Ar lines at Z=-26 cm
Sep 14 1999 02:59:05:000PM	990914012	Jim Terry	good EDA from 0.712 to 1.32 s, RF at 1.72 MW - looked at H-like N (not seen) and Ar lines at Z=-26 cm
Sep 14 1999 03:00:29:437PM	990914013	Jim Terry	good EDA from 0.706 to 1.31 s, RF at 1.76 MW - looked at midplane H-like N (not seen) and Na-like Mo
Sep 14 1999 03:04:29:293PM	990914014	Jim Terry	good EDA from 0.70 to 1.305 s, RF at 1.77 MW - McPherson detector tripped
Sep 14 1999 03:23:12:250PM	990914015	Jim Terry	good EDA from 0.70 to 1.31 s, RF at 1.76 MW - turned the Ar OFF - looked at midplane Be-like Ar, H-like B
Sep 14 1999 03:25:42:530PM	990914016	Jim Terry	good EDA from 0.69 to 1.41 s, RF at 1.70 MW - Ar OFF - looked at midplane HeII, Li-like Ar, Na-like Fe
Sep 14 1999 03:28:26:700PM	990914018	Jim Terry	good EDA from 0.69 to 1.5 s, RF at 1.75 MW - Ar ON - looked at Li-like F at Z=-27 cm
Sep 14 1999 03:40:04:327PM	990914019	Jim Terry	good EDA from 0.69 to ~1.42 s, RF dropping from 1.75 to .92 MW at 0.74 s - Ar ON - looked at CII (1335 A) and BI (1362 A) for C/B source comparison Z=-27 cm
Sep 14 1999 03:56:36:873PM	990914020	Jim Terry	good EDA from 0.76 to 1.42 s, RF only at 0.96 MW - Ar ON - looked at CII and BI at Z=-27 cm
Sep 14 1999 04:59:52:623PM	990914021	Jim Terry	good EDA from 0.76 to ~1.43 s, RF at 1.75 MW - Ar ON - looked at Li-like C at Z=-27 cm - also saw strong BII - 1624 A line
Sep 14 1999 04:39:03:670PM	990914022	Jim Terry	good EDA from 0.695 to ~1.42 s, RF drops from 1.72 to 1 MW at .9 - Ar ON
Sep 14 1999 05:10:41:763PM	990914023	Jim Terry	good EDA from 0.68 to ~1.41 s, RF at 1.65 MW - Ar ON
Sep 14 1999 05:30:50:590PM	990914024	Jim Terry	good EDA from 0.69 to ~1.41 s, RF at 1.75 MW - Ar ON - Chromex to 486. nm for cross calibration with McPherson

Physics Operator Comments
Sep 14 1999 09:44:05:873AM		Earl Marmar	MP#214 ICRF Conditioning SL: Wukitch/Schilling PO: Marmar The run should begin at 9:00AM and end at 5:00PM. Start (after Tuesday OH test) with standard 1MA, 5.4T plasma (like 990908004, but at slightly higher toroidal field). Bring up the power on the D and E port RF systems, until we achieve reproducible EDA H-Modes with total RF power exceeding 2 MW. If this is successful, turn the run over to MP#241 EDA Impurities with Jim Terry as shot leader. Engineering setup: *** Boronization, followed by Helium ECDC until approximately 6:00 am. No deuterium ECDC before the run. *** Setup power supplies from 990908004 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled 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. We boronized last night, 9/13, and used 114 psi of diborane for an average deposition of 1667 Angstroms. Boronization was followed by 4.25 hours of helium ECDC at 5e-5 Torr. The ECDC resonance was scanned to the outer wall.
Sep 14 1999 09:44:17:140AM	990914001	Earl Marmar	OH test
Sep 14 1999 10:12:28:000AM	990914002	Earl Marmar	Load from 990908004 Raise TF to -150 kA from -142 (RF running at 80 MHz today) Reduce prepuff to 18 ms Argon puff to 25 msec plasma hesitation at breakdown density rises late, due to x-point sweep ---> detachment 0.6 MW from D-Port; 0 from E-port
Sep 14 1999 10:37:29:200AM	990914003	Earl Marmar	add 1 mT to BR_0 offset change RXL and ZXL so X-Point doesn't sweep down and in plasma less hesitation big injection starting just before 0.1 s reported as boron from the inner wall, visible on the wide angle camera 0.8 MW D, trippage on E
Sep 14 1999 10:54:29:763AM	990914004	Earl Marmar	no PCS changes plasma 1 MW on D; 0.5 MW (briefly) on E still an injection around 0.1 s, but much smaller
Sep 14 1999 11:21:29:233AM	990914005	Earl Marmar	no PCS changes plasma 1.2 MW D; 0.4 MW E (trips when plasma goes into H-Mode) EDA'ish H-Mode, injection at 1.12 s ---> back to L-mode B_R may now be slightly too positive
Sep 14 1999 11:34:35:530AM	990914006	Earl Marmar	start TF rampdown at 1.4 s BR_0 to 0.0005 from 0.001 plasma 2.2 MW RF briefly; stays in H-mode for >.1 s after RF turns off also a rampdown H-mode current rise looks ok
Sep 14 1999 11:56:40:500AM	990914007	Earl Marmar	no PCS changes plasma nice steady state EDA H-mode 1.8 MW RF some hesitation during initial current rise
Sep 14 1999 12:09:26:560PM	990914008	Earl Marmar	no PCS changes plasma EDA H-Mode 1.8 MW briefly, then 1 MW (D only) for most of the H-Mode current rise ok
Sep 14 1999 12:38:52:983PM	990914009	Earl Marmar	no PCS changes fizzle B_Z may be coming up a bit slow
Sep 14 1999 01:09:00:607PM	990914010	Earl Marmar	EF4 current to -1270 from -1285 for t<0 plasma 1.8 MW, briefly, then 1.0 MW, D only EDA H-Mode
Sep 14 1999 01:09:52:890PM	990914011	Earl Marmar	no PCS changes plasma RF similar to shot 10 EDA H-Mode
Sep 14 1999 01:40:36:077PM	990914012	Earl Marmar	no PCS changes plasma 1.6 MW steady EDA H-Mode
Sep 14 1999 01:42:19:543PM	990914013	Earl Marmar	add TF jog for ECE plasma 1.6 MW steady EDA
Sep 14 1999 01:56:48:420PM	990914014	Earl Marmar	no PCS changes plasma 1.7 MW steady EDA
Sep 14 1999 02:24:04:670PM	990914015	Earl Marmar	Disable argon puff Decrease clearin by .002 to decrease outer gap by 2 mm plasma 1.7 MW steady EDA
Sep 14 1999 02:41:34:013PM	990914016	Earl Marmar	no PCS changes plasma 1.7 MW steady EDA, then ramping to 2 MW after 1.3 s
Sep 14 1999 03:02:01:560PM	990914017	Earl Marmar	B side lower (argon) enabled dud no TF
Sep 14 1999 03:23:13:077PM	990914018	Earl Marmar	no PCS changes plasma 1.7 MW EDA, ramping up to 2.3 MW at end
Sep 14 1999 03:28:44:967PM	990914019	Earl Marmar	no PCS changes plasma 1 MW most of the time -- EDA
Sep 14 1999 03:49:18:060PM	990914020	Earl Marmar	no PCS changes plasma 1.0 MW EDA ---> 1.4 at end; D only
Sep 14 1999 04:11:54:967PM	990914021	Earl Marmar	no PCS changes plasma 1.7 MW steady EDA, ramping to 2.3 MW at end
Sep 14 1999 04:22:59:530PM	990914022	Earl Marmar	no PCS changes plasma 1.6 --> 1.0 --> 1.4 MW (E tripped at 0.9 s)
Sep 14 1999 04:48:15:500PM	990914023	Earl Marmar	no PCS changes plasma 1.6 MW steady EDA, briefly 2.2 MW
Sep 14 1999 05:00:22:920PM	990914024	Earl Marmar	no PCS changes plasma 1.6 MW steady EDA, ramping to 2.3 MW at end

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:33:49:717AM	Test	Ok	OH1,2,u,l test OK
2	09:57:19:077AM	Plasma	Ok	plasma / no faults
3	10:28:32:500AM	Plasma	Ok	no faults
4	10:46:30:653AM	Plasma	Ok	no faults/plasma
5	11:03:48:483AM	Plasma	Ok	no faults/plasma
6	01:41:25:077PM	Plasma	Ok
7	01:41:25:090PM	Plasma	Ok
8	01:41:25:107PM	Plasma	Ok
9	01:41:25:140PM	Plasma	Ok
10	01:41:25:140PM	Plasma	Ok
11	01:41:25:153PM	Plasma	Ok
12	01:41:25:170PM	Plasma	Ok
13	01:41:25:170PM	Plasma	Ok
14	01:52:00:903PM	Plasma	Ok	no faults/plasma
15	02:09:58:263PM	Plasma	Ok	no faults/plasma
16	02:34:51:450PM	Plasma	Ok	no faults/plasma
17	02:51:29:250PM	Plasma	Bad	unexplained / tf did not fire
18	03:04:30:920PM	Plasma	Ok	no faults
19	03:23:02:280PM	Plasma	Ok	no faults/plasma
20	03:43:10:827PM	Plasma	Ok	no faults/plasma
21	03:59:00:217PM	Plasma	Ok	no faults/plasma
22	04:17:08:373PM	Plasma	Ok	(null)
23	04:35:06:903PM	Plasma	Ok	(null)
24	04:55:15:920PM	Plasma	Ok	(null)