Miniproposals

Miniproposal: 214 Date Filed: 1/5/1999 Title: D and E-port RF System Commissioning First Author: Steve Wukitch Session Leader: Rejean Boivin (shots 1-28) Session Leader: Steve Wukitch (shots 1-28)

Engineering Operator Run Comment

MP #214 RF Conditioning/Rowan, Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:20:977PM

Author: To Be Determined

#44 of 47 OPS Date: 20-AUG-1999 18:34 Expires: 25-AUG-1999 18:33 From: MHERTZ::WUKITCH Subj: run_summary_990820 Engineering setup and Run Plan for Fri. 8/20/1999 Run to start no earlier than 10:00AM, more likely around noon, depending on how long it takes to repair the PF breaker. End time is planned to be 6PM. SL: Wukitch/Boivin PO: Rowan MP 214 -- RF conditioning Continue RF conditioning on J-port Start with standard 1MA 5.2T plasmas (like 990818002) and try to optimize heating with J3 and J4 running together. Back-up MP228 -- SOL Transport with Ohmic H-Modes. Similar to 990819001. Engineering setup Setup power supplies from 990818002 Two hours of ECDC in D2 prior to the run. 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 001 plasma 002 plasma no gate from FMIT#3 003 plasma 004 next shot: extend gate to 1.75 sec to try see the reset overlap for short time 005 plasma ran well overlapped phasing appears [0,0,pi,pi] next shot: retune, extend phase shifter 1.5 006 plasma faults after 1 sec phasing appears [0,.25pi,pi,1.25pi] next shot: move phase shifter further 007 plasma phasing was unchanged next shot: insert .7pi cable 008 plasma H-mode!!! [0,pi,pi,0] next shot: return to [0,.25pi,pi,1.25pi] 009 plasma no H-mode next shot: return to [0,pi,pi,0] 010 plasma H-mode next shot: increase power and retune 011 plasma phasing is off from tune floating potential climbs when phasing is off [0,pi,pi,0] next shot: rephase 012 plasma improved the phasing H-mode next shot: retune 013 plasma 014 015 plasma brief H-modes next shot: raise density 1.2 016 plasma no FMIT#3 - no reset next shot: repeat 017 disruption @1.14 sec nl ~ 1.09 pre RF next shot: repeat with higher nl 018 disruption @1.2 sec nl~1.07 pre RF H-modes next shot: lower density to 0.8 019 disruption @1.2 sec no FMIT#4 - 9 re-tries next shot: shorten RF pulse and decrease #4 demand 020 disruption @1 sec nl~0.8 brief H-modes next shot: increase plasma gap from 0.8 to 1.2 cm 021 disruption @1.1 nl~0.9 brief H-mode gap ~1.2 cm next shot: decrease RF power and lengthen pulse 022 late H-mode no disruption Pnet~1 MW H/D remained at 6% next shot: increase RF power by ~400 kW 023 disruption @1.23 sec Pnet~1.5 MW H/D climbed to 10% next shot: decrease RF power by ~200 kW 024 no disruption Pnet~1.4 MW during slow ramp H/D rises from 5-8% next shot: repeat 025 disruption @ gap was 1.0 cm H/D rises again next shot: increase gap to 1.2 cm 026 early disruption @0.74 sec next shot: decrease RF power by 300 kW 027 no disruption late H-mode H/D next shot: ramp RF power to 2.4 MW 028 ======================= Summary ======================= Continued J-port antenna conditioning and testing into 5.2 T plasmas (H resonance is on-axis at 78 MHz). We were successful in demonstrating heating with J-port antenna. Scanning different relative antenna strap current phases, the best heating was observed with [0,pi,pi,0]. Other phases did not result in H-mode and had signficantly more impurity influx, particularly Ti, Mo, and C. The H/D ratio was increasing with RF power and throughout the day. The source may be the TiCN coated Faraday screen. We found that full current disruptions could be avoided by lowering the RF power. A small density scan suggested that the impurity injections were insensitive to density. The antenna operated with lower loading (more like normal D and E-port loading values) with an outer gap at 1.2 cm. The impurity influx appears to require more conditioning to reduce it.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:08:410PM

Author: To Be Determined

Physop Report for Friday, August 20, 1999 SL: S. Wukitch/R. Boivin PO: W. Rowan EO: F. Silva/B. Cochran/G. DeKow The purpose was to continue RF conditioning of J-Port antenna with 1MA 5.2T plasmas (similar to 990818002) and to attempt to optimize heating with J3 and J4 running together (MP 214). Progress toward completion of this MP is described in the Session Leader Summary. Loaded shot 990820999 from cmod$test_shots[hybrid.pcs] to begin the run. This shot was created on 8/19 by Wolfe. It represents the intended changes to 990819001, and would have been shot 990819002 if that shot had been run. This shot is particularly useful as it contains the setup for RF conditioning in segment 1 and the setup for Ohmic H-modes in segment 2. The run began at approx 10 am as planned. Shots 001 through 016 were run without changes and with frequent requests for power room access by RF folk. There were some impurity injections -- apparently from the RF antenna. These seem to be reflected in a small variation in the plasma disruption time (approx 0.010 to 0.020 ms) during rampdown. For a typical shot (006), Jim Terry reported that the injection was composed of Mo and Ti. There were frequent disruptions in the shot range from 017 through 028. The disruptions occurred at about 1 s and were due to impurity injection from the antennas. Larger outer gap may lessen the liklihood of disruption, but this was not clearly demonstrated during the run. The run ended as planned at 6 pm. Engineering Setup Setup power supplies from 990818002 Two hours of ECDC in D2 prior to the run. Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 6 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED Gate valves enabled: ECE, VUV Shot by shot results Shot 001. Plasma. Shot is as planned. Silva is EO Loaded this shot from cmod$test_shots[hybrid.pcs] shot 990820999 Shot 002. Plasma. Shot 003. Plasma Shot 004. Plasma Shot 005. Plasma Shot 006. Plasma Shot 007. Plasma Shot 008. Plasma. Cochran replaces Silva as EO Shot 009. Plasma Shot 010. Plasma. H-mode Shot 011. Plasma. H-mode. (duration approx. 0.04 s) at 0.92 s Shot 012. Plasma. H-mode with duration of approx 0.1 s Silva replaces Cochran as EO Shot 013. Plasma. H-mode duration is approx 0.08 s Shot 014. Plasma. H-mode Shot 015. Plasma. H-mode Shot 016. Plasma . Increased density to 1.2 for this shot on request of SL Shot 017. Disruption at 1.14 s. Slightly increased rate of rise of ne Shot 018. Disruption at 1.2 s DeKow replaces Silva as EO Shot 019. Disruption at 1.15 s Shot 020. Disruption at 1 s Shot 021. Disruption at 1.06 s, Increased ne. Increased outer gap. Shot 022. Plasma. Reduced RF power Shot 023. Disruption at 1.23 s. Decreased RF power. Shot 024. Plasma. Shot 025. Disruption at 1.23 s. Shot 026. Disruption at 0.75 s. Increased outer gap Shot 027. Plasma. Shot 028. Disruption at 1.06 s. Score Card Plasma 19 Disruptions 9 Fizzles 0 Duds 0 Total 28

Session Leader Comments
Aug 20 1999 02:49:37:920PM	990820015	Steve Wukitch	015 plasma brief H-modes next shot: raise density 1.2
Aug 20 1999 02:58:53:873PM	990820016	Steve Wukitch	016 plasma no FMIT#3 - no reset next shot: repeat
Aug 20 1999 03:05:21:390PM	990820017	Steve Wukitch	017 disruption @1.14 sec nl ~ 1.09 pre RF next shot: repeat with higher nl
Aug 20 1999 03:19:04:653PM	990820018	Steve Wukitch	018 disruption @1.2 sec nl~1.07 pre RF H-modes next shot: lower density to 0.8
Aug 20 1999 03:40:52:340PM	990820019	Steve Wukitch	019 disruption @1.2 sec no FMIT#4 - 9 re-tries next shot: shorten RF pulse and decrease #4 demand
Aug 20 1999 04:03:58:780PM	990820020	Steve Wukitch	020 disruption @1 sec nl~0.8 brief H-modes next shot: increase plasma gap from 0.8 to 1.2 cm
Aug 20 1999 04:33:57:233PM	990820021	Steve Wukitch	021 disruption @1.1 nl~0.9 brief H-mode gap ~1.2 cm next shot: decrease RF power and lengthen pulse
Aug 20 1999 04:33:44:543PM	990820022	Steve Wukitch	022 late H-mode no disruption Pnet~1 MW H/D remained at 6% next shot: increase RF power by ~400 kW
Aug 20 1999 04:52:09:780PM	990820023	Steve Wukitch	023 disruption @1.23 sec Pnet~1.5 MW H/D climbed to 10% next shot: decrease RF power by ~200 kW
Aug 20 1999 05:03:39:390PM	990820024	Steve Wukitch	024 no disruption Pnet~1.4 MW during slow ramp H/D rises from 5-8% next shot: repeat
Aug 20 1999 05:20:37:123PM	990820025	Steve Wukitch	025 disruption @ gap was 1.0 cm H/D rises again next shot: increase gap to 1.2
Aug 20 1999 05:52:41:030PM	990820026	Steve Wukitch	026 early disruption @0.74 sec next shot: decrease RF power by 300 kW
Aug 20 1999 05:52:27:903PM	990820027	Steve Wukitch	027 no disruption late H-mode H/D next shot: ramp RF power to 2.4 MW

Physics Operator Comments
Aug 20 1999 09:18:34:013AM		Bill Rowan	Engineering setup and Run Plan for Fri. 8/20/1999 Run to start no earlier than 10:00AM, more likely around noon, depending on how long it takes to repair the PF breaker. End time is planned to be 6PM. SL: Wukitch/Boivin PO: Rowan MP 214 -- RF conditioning Continue RF conditioning on J-port Start with standard 1MA 5.2T plasmas (like 990818002) and try to optimize heating with J3 and J4 running together. Back-up MP228 -- SOL Transport with Ohmic H-Modes. Similar to 990819001. Engineering setup Setup power supplies from 990818002 Two hours of ECDC in D2 prior to the run. 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 Started PCS at 9am. Loaded from cmod$test_shots[hybrid.pcs] shot 990820999 This was created on 8/19 by Wolfe. It represents changes to 990819001. This would have been shot 990819002 if that shot had been run. Executed coldstart at 9:10am with expected result of rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done
Aug 20 1999 09:21:50:107AM		Bill Rowan	Setup is for the RF experiment
Aug 20 1999 10:06:46:857AM	990820001	Bill Rowan	Shot 001 Prior to this shot did a load/clean after selecting segment 2 which is the RF target. Load at 20-Aug-1999 09:27:40.00 Plasma. Shot is as planned.
Aug 20 1999 10:36:06:043AM	990820003	Bill Rowan	Shot 002 No changes in plasma control prior to this shot. Plasma. No changes for next shot Power room access for RF prior to this shot
Aug 20 1999 10:47:47:467AM	990820003	Bill Rowan	Shot 003 Plasma No changes for next shot
Aug 20 1999 10:48:26:187AM	990820003	Bill Rowan	Power room access after this shot
Aug 20 1999 11:05:05:873AM	990820004	Bill Rowan	Shot 004 Plasma No changes prior to next shot
Aug 20 1999 11:20:04:280AM	990820005	Bill Rowan	Shot 005 Power room access by RF before this shot Plasma No changes prior to next shot.
Aug 20 1999 11:41:54:483AM	990820006	Bill Rowan	Shot 006 Power room access by RF before this shot Plasma No changes prior to next shot
Aug 20 1999 12:06:46:687PM	990820006	Bill Rowan	Jim Terry reports that the injection is composed of Mo and Ti for shot 006
Aug 20 1999 12:00:14:793PM	990820007	Bill Rowan	Shot 007 Power room access by RF before this shot Plasma No changes prior to the next shot
Aug 20 1999 12:19:33:950PM	990820008	Bill Rowan	Shot 008 Power room accees by RF before this shot Cochran taking over for Silva as EO Plasma No changes prior to next shot
Aug 20 1999 12:35:51:327PM	990820009	Bill Rowan	Shot 009 Power room access by RF before this shot Plasma No changes before this shot
Aug 20 1999 12:57:47:983PM	990820010	Bill Rowan	Shot 010 Plasma. H-mode No changes before the next shot.
Aug 20 1999 01:12:56:123PM	990820011	Bill Rowan	Shot 011 Power room access by RF before this shot. Plasma. Brief H-mode (duration approx. 0.04 s) at 0.92 s No changes before the next shot
Aug 20 1999 01:32:48:750PM	990820012	Bill Rowan	Shot 012 Power room access by RF before this shot Silva replaces Cochran as EO Plasma. H-mode with duration of approx 0.1 s
Aug 20 1999 01:47:08:437PM	990820013	Bill Rowan	Shot 013 Plasma. H-mode duration is approx 0.08 s
Aug 20 1999 02:05:14:200PM	990820014	Bill Rowan	Shot 014 Plasma. H-mode
Aug 20 1999 02:21:28:077PM	990820015	Bill Rowan	Shot 015 Plasma. H-mode
Aug 20 1999 02:40:19:123PM	990820016	Bill Rowan	Shot 016 Increased density to 1.2 for this shot on request of SL For the next shot, attempted to increase the rate of rise of the density so that it will reach 1.2 before the RF comes on
Aug 20 1999 02:58:46:437PM	990820017	Bill Rowan	Shot 017 Disruption at 1.14 s Appears to be an injection that causes the disruption. No changes before next shot
Aug 20 1999 03:22:59:700PM	990820018	Bill Rowan	Shot 018 Disruption at 1.2 s Again appears to be an injection that causes the disruption. Lowered density to 0.8. DeKow replaces Silva as EO
Aug 20 1999 03:40:17:013PM	990820019	Bill Rowan	Shot 019 Disruption at 1.15 s No changes before next shot.
Aug 20 1999 03:58:45:857PM	990820020	Bill Rowan	Shot 20 Disruption at 1 s
Aug 20 1999 04:15:04:217PM	990820021	Bill Rowan	Shot 21 Decreased RCUR by 0.002. Increased outer gap to 1.2 Increased ne to 1 Disruption at 1.06 s No changes in plasma control for the next shot. Reducing the RF power for the next shot
Aug 20 1999 04:27:26:000PM	990820022	Bill Rowan	Shot 022 Plasma. Full length shot. H-mode at 1.16 No changes for next shot.
Aug 20 1999 04:41:11:233PM	990820023	Bill Rowan	Shot 023 Disruption at 1.23 s. No changes in plasma control for next shot. Decreasing the RF power.
Aug 20 1999 04:56:00:123PM	990820024	Bill Rowan	Shot 024 Full length shot. No changes in plasma control for next shot.
Aug 20 1999 05:02:48:750PM	990820024	Bill Rowan	Changed RCUR to change outer gap from 1.35 to 1.2 for next shot
Aug 20 1999 05:14:43:840PM	990820025	Bill Rowan	Shot 025 Disruption at 1.23 s. For the next shot. Change RCUR to move outer gap from 1.0 to 1.2
Aug 20 1999 05:32:09:030PM	990820026	Bill Rowan	Shot 026 Disruption at 0.75 s. Reducing RF power for next shot.
Aug 20 1999 05:44:41:217PM	990820027	Bill Rowan	Shot 027 Full length shot Right gap is approximately 1.2 No changes in plasma control for the next shot. Ramping RF power on the next shot.
Aug 20 1999 06:04:13:810PM	990820028	Bill Rowan	Shot 028 Disruption at 1.06 s. Last shot.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:52:01:357AM	Plasma	Ok	no faults/plasma 09:50 start
2	10:14:29:140AM	Plasma	Ok	no faults
3	10:33:14:437AM	Plasma	Ok	no faults/10:30
4	11:00:15:043AM	Plasma	Ok	no faults/10:58
5	11:15:08:543AM	Plasma	Ok	no faults
6	11:35:30:857AM	Plasma	Ok	no faults
7	11:54:30:640AM	Plasma	Ok	no faults
8	12:12:26:623PM	Plasma	Ok	(null)
9	12:30:28:577PM	Plasma	Ok	(null)
10	12:48:17:373PM	Plasma	Ok	(null)
11	01:05:46:340PM	Plasma	Ok	(null)
12	01:24:59:687PM	Plasma	Ok	(null)
13	01:41:23:700PM	Plasma	Ok	no faults
14	01:56:35:437PM	Plasma	Ok	no faults
15	02:14:15:607PM	Plasma	Ok	no faults
16	02:31:24:543PM	Plasma	Ok	no faults
17	02:47:32:280PM	Plasma	Ok	no faults
18	03:06:57:217PM	Plasma	Ok	no faults
19	03:24:41:873PM	Plasma	Ok	(null)
20	03:41:56:217PM	Plasma	Ok	(null)
21	04:01:24:670PM	Plasma	Ok	(null)
22	04:17:36:717PM	Plasma	Ok	(null)
23	04:33:27:827PM	Plasma	Ok	(null)
24	04:52:16:340PM	Plasma	Ok	(null)
25	05:07:27:340PM	Plasma	Ok	(null)
26	05:23:56:920PM	Plasma	Ok	(null)
27	05:38:53:403PM	Plasma	Ok	(null)
28	05:57:47:450PM	Plasma	Ok	(null)