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 1-23)

Miniproposal: 225 Date Filed: 1/14/1999 Title: Determination of the Mo source which dominates the core Mo levels First Author: Bruce Lipschultz Session Leader: Steve Wukitch (shots 1-23)

Engineering Operator Run Comment

Run 991112 in support ofMP214: RF Conditioning MP225:

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:22:507PM

Author: To Be Determined

Run 991112 in support of MP214: RF Conditioning MP225: Determination of Mo Source, will ride along as possible. Run will BEGIN at 09:00 and END at 17:00 FMIT#3 and FMIT#4 should be made ready for operation. FMIT#1 should be warmed up and ready to go when needed. Setup power supplies from shot 99111005. This shot was a 5.2 T, 800 kA discharge, with a 1.5 s flattop. We will continue with 50 kA backporch on TF pulse. Two hours of ECDC in D2 at 2.e-4 Torr before the run (should be stopped by 08:00). 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 10 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled Enable ECE and VUV. ********* Run plan ********* Evaluate effect of plasma density, gap, plasma shape, and edge gradient on J-port power density limit. Shot Schedule: Standard shot: J-port (0,pi,0,pi,) stepping up to moderate power levels BT = 5.2 T, Ip=800 kA, nl= 1.0x10^20 0.5, 0.75, and 1.3 MW each step is 0.3 sec 1. with J-port (0,pi,0,pi), scan density (0.7, 1.0, 1.3) (3 good shots) 2. with J-port (0,pi,0,pi,), scan outer gap 1.4, 1.0, and 0.6 cm. (3 good shots) 2a. dynamic gap scan at constant power (1 good shot) 3. compare J-port (0,pi,0,pi,), J-port (0,pi,pi,0), J3, J4 at moderate power levels in H-mode D-port at 1.4 MW (4 good shots) 4. Go to best condition and raise power level. (at least 5 shots) ---------------------------------------------------------------------------- 001 standard shot (loaded 991110005) lost #4 to xbar right before shot - tube arc (spark gap fired) fizzle 002 plasma - early disruption little H-mode 5.2 T, 0.8 kA nl target was 1.0 next shot: raise field to 5.6 T and aim for nl target of 0.7 003 plasma imto H-mode when RF comes on 5.6 T, 0.8 kA nl target was 0.7, reached next shot: repeat with increase in gap and power up to 1.5 MW total 004 plasma many little H-modes - many faults on #4 from prefl/pforw 5.6 T, 0.8 kA nl target was 0.7, reached next shot: target nl = 1.3 005 plasma J4 faulted after short pulse J3 faulted early nl-> 1.3 next shot: retune 006 plasma J4 faulted after short pulse J3 faulted early nl-> 1.3 lost TCI next shot: retune and ramp J3 this time cell access to fix TCI 007 plasma J4 faulted after short pulse J3 faulted early nl-> 1.3 next shot: retune and ramp J3 this time 008 plasma J4 faulted after short pulse J3 ramped and then faulted off nl-> 1.3 next shot: return to nl->1.0 and right gap of 1.4-1.5 cm 009 plasma early disruption comment: J-port really does not run at higher densities, particularly J3 density appears to be the best knob to change the power density limit next shot: return to nl->1.0 and right gap of 1.0 cm will probably have no interferometer data 010 plasma little H-modes gap was correct but the density may have been a bit higher next shot: nl->1.0 and right gap of 0.5 cm 011 plasma gap was 1.0 cm density was a bit low but acceptable right gap 0.7 cm next shot: nl->1.0 and scan right gap from 1.5-0 cm 012 plasma gap was 1.5-.25 cm J3 failed next shot: nl->1.0 and scan right gap from 1.5-0 cm 013 no density control next shot: nl->1.0 and scan right gap from 1.5-0 cm 014 plasma j3 and j4 had faults but recovered good gap sweep next shot: nl->1.0 and raise plasma z position 0.5 cm 015 plasma H-mode z position up by 0.5 cm from xrays z = 0.25 cm next shot: nl->1.0 and lower plasma z position by 0.5 cm 016 plasma H-mode z position down by 0.5 cm from xrays z = -0.6 cm next shot: nl->1.0 and scan z position from +0.75 -> -.75cm 017 plasma no outstanding effect next shot: constant shots with D-port z pos +0.5 cm 018 plasma early disruption H-mode z = 0.5 cm next shot: repeat with 2 MW from J and 1.4 MW from D 019 plasma H-mode z = 0.5 cm few faults on #3 next shot: repeat with 2.75 MW from J and 1.4 MW from D 020 plasma - blew away the plasma at ~0.7 sec next shot: repeat with lower density (30%) 2.75 MW from J and 1.4 MW from D 021 plasma #4 had a tube arc during the discharge #3 had a bizarre event where the anode current went negative breakpulled next shot: J down for break D-port only 022 plasma gruesome 023 plasma D-port only good EDA last shot of the campaign ******* Summary ******* We were successful in performing density, gap, and vertical position scans. With respect to gap and vertical position, any other combination other than the one we have been running appeared to have less impurities. At high densities, J3 would not run. It appeared to arc consistently and fail after 9 retries. The antenna was more consistent at low density in terms of coupling power. We had a bad event with FMIT#3 on 021. We should do some dummy load testing next week to verify operation. Signing off.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:10:113PM

Author: To Be Determined

Physics Operator's summary for Friday, Nov 12, 1999. MP#214: ICRF (J-port) MP#225: Impurity ssources (piggyback) SL: Wukitch PO: wolfe EO: Cochran,Dekow Setup/Run plan -------------- Run will BEGIN at 09:00 and END at 17:00. ***THIS WILL BE THE FINAL RUN OF THE 1999 OPERATING CAMPAIGN*** FMIT#3 and FMIT#4 should be made ready for operation. FMIT#1 should be warmed up and ready to go when needed. Setup power supplies from shot 991110005. This shot was a 5.2 T, 800 kA discharge, with a 1.5 s flattop. We will continue with 50 kA backporch on TF pulse. Two hours of ECDC in D2 at 2.e-4 Torr before the run (should be stopped by 08:00). 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 10 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled Enable ECE and VUV. IMPORTANT NOTE: The last three or so shots of the day, beginning at around 16:15, will be run with the TF cooling tuned off, to prepare for the possibility that we will want to remove the cylinder before the next campaign. These shots will be run with the fizzle detector to the TF disabled, and will continue until the upper arms reach a maximum temperature of -50C. Irby and/or Gwinn will oversee this magnet warm-up procedure. ********* Run plan ********* Evaluate effect of plasma density, gap, plasma shape, and edge gradient on J-port power density limit. Shot Schedule: Standard shot: J-port (0,pi,0,pi,) stepping up to moderate power levels BT = 5.2 T, Ip=800 kA, nl= 1.0x10^20 0.5, 0.75, and 1.3 MW each step is 0.3 sec 1. with J-port (0,pi,0,pi), scan density (0.7, 1.0, 1.3) (3 good shots) 2. with J-port (0,pi,0,pi,), scan outer gap 1.4, 1.0, and 0.6 cm. (3 good shots) 2a. dynamic gap scan at constant power (1 good shot) 3. compare J-port (0,pi,0,pi,), J-port (0,pi,pi,0), J3, J4 at moderate power levels in H-mode D-port at 1.4 MW (4 good shots) 4. Go to best condition and raise power level. (at least 5 shots) Results: -------- The machine ran well, and most of the investigations were accomplished. We added a step 2b, to determine the effect of raising and lowering ZCUR on the RF performance. The phase comparison was not attempted. Total power was raised to 4MW for a brief period on shot 20, before it disrupted. Up to 3.5 MW was sustained on shot 19, but the Mo radiation was very high, and heating was poor. On shot 21, FMIT#3 had a crowbar during the pulse, and the anode current trace appeared to go very negative. Wukitch decided not to risk additional operation with J-port. The last two shots were run with D-port alone. Shot 23 had 1.5MW from D-port, and got a good looking H-mode, but only reached ~80kJ. The TCI laser became unreliable, so we switched over to NL_ZMETER control for shots 10-12, and 14-23. This worked reasonably well, although there was some thrashing in determining the correct setpoint. For shot 11 and thereafter, the gain was raised from 5 to 9. Irby decided not to go through the magnet warm-up procedure, so we will have to use inductive heating with the EF4's if we need to pull the cylinder. Scorecard: ---------- Tests 0 Duds 0 Fizzles 1 Plasmas 22 ------- -- Shots 23

Session Leader Comments

Physics Operator Comments
Nov 12 1999 07:23:24:043AM		Steve Wolfe	Load from 991110005 Load/CLean JAS is apparently dealing with a data syste problem. Try doing a coldstart anyway Coldstart ok. Logfile ok Josh seems to have fixed the problem
Nov 12 1999 07:29:10:450AM		Steve Wolfe	Run 991112 in support of MP214: RF Conditioning MP225: Determination of Mo Source, will ride along as possible. Run will BEGIN at 09:00 and END at 17:00. ***THIS WILL BE THE FINAL RUN OF THE 1999 OPERATING CAMPAIGN*** FMIT#3 and FMIT#4 should be made ready for operation. FMIT#1 should be warmed up and ready to go when needed. Setup power supplies from shot 991110005. This shot was a 5.2 T, 800 kA discharge, with a 1.5 s flattop. We will continue with 50 kA backporch on TF pulse. Two hours of ECDC in D2 at 2.e-4 Torr before the run (should be stopped by 08:00). 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 10 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled Enable ECE and VUV. IMPORTANT NOTE: The last three or so shots of the day, beginning at around 16:15, will be run with the TF cooling tuned off, to prepare for the possibility that we will want to remove the cylinder before the next campaign. These shots will be run with the fizzle detector to the TF disabled, and will continue until the upper arms reach a maximum temperature of -50C. Irby and/or Gwinn will oversee this magnet warm-up procedure. ********* Run plan ********* valuate effect of plasma density, gap, plasma shape, and edge gradient on J-port power density limit. Shot Schedule: Standard shot: J-port (0,pi,0,pi,) stepping up to moderate power levels BT = 5.2 T, Ip=800 kA, nl= 1.0x10^20 0.5, 0.75, and 1.3 MW each step is 0.3 sec 1. with J-port (0,pi,0,pi), scan density (0.7, 1.0, 1.3) (3 good shots) 2. with J-port (0,pi,0,pi,), scan outer gap 1.4, 1.0, and 0.6 cm. (3 good shots) 2a. dynamic gap scan at constant power (1 good shot) 3. compare J-port (0,pi,0,pi,), J-port (0,pi,pi,0), J3, J4 at moderate power levels in H-mode D-port at 1.4 MW (4 good shots) 4. Go to best condition and raise power level. (at least 5 shots)
Nov 12 1999 09:07:54:840AM	991112001	Steve Wolfe	shot 1: No RF people in evidence. Increase pre-puff from 16->18msec and take a shot. fizzle , we're not off to a good start. BR looks very positive, around 3mT. Next shot: decrease BR_0 from -.0005 to -.0025
Nov 12 1999 09:32:22:763AM	991112002	Steve Wolfe	shot 2: decrease BR_0 from -.0005 to -.0025 plasma, disrupts at 1.15 Br still starts positive, drops to zero. BD a little late, still Next shot: raise field to 5.6tesla, drop ne4 to 0.7e20
Nov 12 1999 09:36:35:750AM	991112002	Steve Wolfe	shot 2: decrease BR_0 from -.0005 to -.0025 plasma, disrupts at 1.15 Br still starts positive, drops to zero. bd ok. Next shot: raise field to 5.6tesla, drop ne4 to 0.7e20, drop pre-puff to 16
Nov 12 1999 09:53:46:390AM	991112003	Steve Wolfe	shot 3: raise field to 5.6tesla, drop ne4 to 0.7e20, drop pre-puff to 16 plasma, full length, h-modes. Big injection at .27 almost did it in. looks like some non-thermals early. outer gap is around 5mm Next shot: raise pre-puff to 18ms, devcrease RCUR from .671->.669
Nov 12 1999 10:10:55:280AM	991112004	Steve Wolfe	shot 4: raise pre-puff to 18ms, decrease RCUR from .671->.669 plasma, h-modes, lots of junk. RF to 1.4MW early injection at .11sec. Next shot: raise density to 1.3e20
Nov 12 1999 10:30:37:733AM	991112005	Steve Wolfe	shot 5: raise density to 1.3e20, increase pg3 seg 2 maint level to ~40V plasma, no hmodes, no j3, j4 max is 0.5MW nl4=1.3 next shot: repeat, with RF?
Nov 12 1999 10:59:33:950AM	991112006	Steve Wolfe	shot 6: repeat, with RF? disrupts at 1.43sec, JHI reports no TCI. No density traces or feedback. TS density is 1.5e20/m3 next shot: Drop pre-fill, otherwise repeat, (with TCI)
Nov 12 1999 11:43:37:000AM	991112007	Steve Wolfe	shot 7: Drop pre-fill to 16msec, otherwise repeat, (with TCI) plasma, no hmodes, not much rf, only j4 at .5MW. Injections at .5,.93,1.03 Next shot: Shit shooter injecting C at 0.5
Nov 12 1999 12:01:48:450PM	991112008	Steve Wolfe	shot 8: One more try at RF at the high density. Shit shooter injecting C at 0.5 plasma, no hmodes, no j3. Next shot: down to 1.0e20, increase gap to 1.5 or so.
Nov 12 1999 12:20:08:543PM	991112009	Steve Wolfe	shot 9: down to 1.0e20, lower pg3 seg 2, rcur from .669->.666 plasma, h-modes, junk, disrupts at 1.41; 1.5MW, hardly any heating. TCI dropped fringes, but feedback was ok. gap was 1.5-1.4cm. Next shot: 1cm gap
Nov 12 1999 12:43:51:403PM	991112010	Steve Wolfe	shot 10: RCUR back to .669 from .666. Irby reports TCI is dead; change to NL_ZMETER from 990202014, request level is 0.4, extend to 1.5sec plasma, h-mode, injections but it survived. RF to 1.25MW TCI is indeed dead. Irby to cell to try to resurrect. Next shot: increase gain on ZMETER, go to .5cm gap
Nov 12 1999 01:22:34:310PM	991112011	Steve Wolfe	shot 11: increase gain on NL_ZMETER from 5.->9., go to .5cm gap (RCUR from .669->.671) plasma, h-mode, TCI is back for now. INjection at 1.38 almost kills plasma. NL4 is only .85e20. Next shot: increase NL_ZMETER from .4 ->.55; dynamic gap scan.
Nov 12 1999 01:41:49:450PM	991112012	Steve Wolfe	shot 12: increase NL_ZMETER from .4 ->.55; dynamic gap scan: RCUR from .666 to .674 over .55s : 1.4sec plasma, no h-mode, no j3. Got 1.2e20. gap scan from 1.9cm : .3cm Next shot: put NL4 control back on (1.e20); RF will try for both of J
Nov 12 1999 02:05:10:250PM	991112013	Steve Wolfe	shot 13: put NL4 control back on (1.e20); RF will try for both of J plasma, TCI gone again!. Lots of density, judging from the TV disrupts at 1.6sec. Ran out of oh1, ef1u, ef1l; ef2's go to zero. no rf. TS says 4e20 Next shot: back to NL_ZMETER, ask for 0.48
Nov 12 1999 02:19:57:327PM	991112014	Steve Wolfe	shot 14: back to NL_ZMETER, ask for 0.48 plasma, some big injections, big bite at 1.37sec, but survives No J3. Still getting nl4 of 1.2 (it came back) Next shot: Gap back to 1cm, drop the density
Nov 12 1999 02:40:20:140PM	991112015	Steve Wolfe	shot 15: NL_ZMETER ask for 0.44, eliminate gap sweep, RCUR=.669, raise ZCUR by 0.5cm plasma, hmodes, rf. Next shot: down by .5cm from original
Nov 12 1999 02:59:49:577PM	991112016	Steve Wolfe	shot 16: down by .5cm from original plasma, h-modes, rf Next shot: ramp zcur
Nov 12 1999 03:19:50:187PM	991112017	Steve Wolfe	shot 17: ramp zcur -.0075 to -.0225 plasma, hmodes, rf. Next shot: PUt ZCUR "at the midplane or a little above"
Nov 12 1999 03:42:24:250PM	991112018	Steve Wolfe	shot 18: ZCUR=-.009, RF will turn on D-port. plasma, hmodes, disrupts at 1.50 D-port up to 1.5MW, 0.6:1.1sec, J@1.5 until 1.5 Next shot: RF will raise J power some more.
Nov 12 1999 03:58:13:077PM	991112019	Steve Wolfe	shot 19: RF will raise J power some more. No PCS changes plasma, h-modes, some injections, neuts to 4e12. RF up to 3.6MW. D=1.5,J=2 Next shot: more power.
Nov 12 1999 04:16:40:937PM	991112020	Steve Wolfe	shot 20: more power? Disrupts at 0.74 sec. 2pi diode hit 2MW before the big one. Got to 4MW, briefly. Next shot: lower density.
Nov 12 1999 04:33:44:793PM	991112021	Steve Wolfe	shot 21: lower density. NL_Zmeter from .44 to .25. I have no clue what density I will get, since Z goes up as n goes down. It may well turn the gas off completely, since I also lowered the pg3 maintenance level to 10V. plasma, hmode, J3&4 dropped out. NL4 about .7e20. Next shot: "try to get 3&4 to stay on", bring nl up a littel
Nov 12 1999 04:52:22:933PM	991112022	Steve Wolfe	shot 22: Transmitter 3 may have a problem. That will be all for J port. Take a shot with D only. plasma, h-modes, lots of radiation. Next shot: raise nl_zmeter back to .44
Nov 12 1999 05:09:22:090PM	991112023	Steve Wolfe	shot 23: raise nl_zmeter back to .44, increase pg3 level to 25V plasma, decent hmode. neuts at 3e12. END OF THE 1999 CAMPAIGN!

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:00:22:890AM	Plasma	Ok	Fizzle
2	09:26:25:763AM	Plasma	Ok	plasma
3	09:44:22:747AM	Plasma	Ok	Plasma
4	10:03:15:373AM	Plasma	Ok	plasma
5	10:24:18:793AM	Plasma	Ok	(null)
6	10:46:01:967AM	Plasma	Ok	(null)
7	11:36:49:513AM	Plasma	Ok	(null)
8	11:55:50:843AM	Plasma	Ok	(null)
9	12:11:57:153PM	Plasma	Ok	(null)
10	12:31:20:857PM	Plasma	Ok	(null)
11	01:14:07:700PM	Plasma	Ok	(null)
12	01:34:40:250PM	Plasma	Ok	(null)
13	01:55:47:480PM	Plasma	Ok	(null)
14	02:15:05:093PM	Plasma	Ok	(null)
15	02:35:18:420PM	Plasma	Ok	(null)
16	02:54:04:500PM	Plasma	Ok	(null)
17	03:12:53:687PM	Plasma	Ok	(null)
18	03:32:50:577PM	Plasma	Ok	(null)
19	03:50:48:077PM	Plasma	Ok	(null)
20	04:10:42:217PM	Plasma	Ok	(null)
21	04:27:29:997PM	Plasma	Ok	(null)
22	04:47:18:187PM	Plasma	Ok	(null)
23	05:06:04:717PM	Plasma	Ok	(null)