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 1-29) Session Leader: J. Randall Wilson (shots 1-29) Session Leader: E. Nelson Melby (shots 1-29)

Engineering Operator Run Comment

MP#214 ICRF conditioning/Wolfe/Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Entered: Jul 7 2004 04:37:00:770PM

Author: To Be Determined

Physop Summary for 990331 MP#214 ICRF conditioning SL: Wilson/Wukitch/Melby PO: wolfe EO: Cochrane, Silva, Dekow The main goal of today's run was to get the D and E port ICRF systems running again, after numerous mods during the maintenance interval. Progress was made, although E-port had some kind of arc detection faults at the 0.2-0.5MW level. Total power got up to 1.7MW. However, it was determined that there had been arcing in the E-port transmission line, and the Thursday and Friday runs were cancelled to facilitate repairs. The machine condition seemed good, despite the He vent and ECDC. EDA H-modes were readily obtained at about 1MW of RF power. The boronization originally planned to follow the run was therefore cancelled. There was a problem with the vacuum during cooldown. F-port seal began leaking, and was purged with Ar. The leak got worse, bringing the base pressure up to the high 10^(-5) scale. It was found that a heater had been removed or turned down, causing a block of ice to form on one side of the port. Tommy retorqued the flange (except for the bolts under the ice), and got it to reseal. Before attempting plasma operation, a series of power tests were run. An ECO recommended by GA for the EFC chopper supply had been implemented on one gate drive board. This tested out ok, and the engineers will duplicate the change on the other three boards. A series of tf-only tests, at 50, 100, and 165kA were run. The last of these, 990331006, will be suitable for checking the BTOR_PICKUP values. A standard "Tuesday test" was run on 990331004. The first plasma attempt was shot 7. The BR_0 had changed substantially from the last run (990305), and we got a fizzle with about -5mT of radial field. Shot #8 also fizzled. Small tweaks on Br, IC_EF4, and the gas puff resulted in robust startups (with no changes) on shot #9-27. Shot #28 fizzled, probably because of a high gas load following an increase in density (and terminating sharkfin), and small tweaks to Br and the pre-puff were made for #29, which ran. Shots #7-23 were constant pcs programming, as the RF group tuned and conditioned. The only variation was shot#17, which had a 20msec Kr pulse for Goetz's impurity experiment. The EDA seemed to be degraded, and the Kr was turned back off for #18. Shots #24-29 had the ZCUR and ZXU raised by 4mm so Dmitri could get better coverage of the H-mode pedestal with the edge Thomson. Shot #27 and 29 had the target density increased to 1.3e20 (from 1.1) at BLIP's request (approved by SL). The RF had difficulty coupling on these shots, so they were both L-modes. Unfortunately, these were the only shots on which Amanda had requested a tf waggle. There were some piggyback experiments that made progress today. Among these, the FSP was observed on the video system, in preparation for the plume imaging experiment. The omegatron got some data and seems to be working now. Rice was trying to fire the shit shooter, and succeeded in getting injections into the limiter/L-mode phase of the discharge. However, he was apparently not successful during H-mode. The injection on shot 26, originally attributed to Zr, apparenly wasn't actually his doing. The I2t detector on the TF was enabled on shot 18, and worked for the remainder of the run (which is to say it did not stop the tf from running). We had cell-access delays in the morning for the F-port seal re-torque, and around noon for re-alignment of the TCI interferometer. We also had two computer problems resulting in short delays, including a reboot of DAIGLE and a window manager restart on MHERTZ. Power Systems ran well all day. Scorecard: ------------ tests 6 duds 0 fizzles 3 plasmas 20 ------- -- shots 29

Session Leader Comments
Mar 31 1999 08:24:11:200AM	990331001	Steve Wukitch	001 chopper test only
Mar 31 1999 08:31:32:733AM	990331002	Steve Wukitch	002 low power TF test
Mar 31 1999 08:44:12:890AM	990331003	Steve Wukitch	003 TF only test
Mar 31 1999 09:22:21:670AM	990331004	Steve Wukitch	004 OH only test
Mar 31 1999 09:46:35:153AM	990331005	Steve Wukitch	005 tf only test
Mar 31 1999 09:46:51:123AM	990331006	Steve Wukitch	006 tf only test
Mar 31 1999 10:08:25:467AM	990331007	Steve Wukitch	007 plasma attempt - fizzle
Mar 31 1999 10:19:05:857AM	990331008	Steve Wukitch	008 plasma attempt - fizzle
Mar 31 1999 10:31:17:373AM	990331009	Steve Wukitch	009 plasma attempt good - tuning D&E low power
Mar 31 1999 10:50:34:763AM	990331010	Steve Wukitch	010 plasma attempt good - tuning D&E low power
Mar 31 1999 11:12:24:747AM	990331011	Steve Wukitch	011 plasma attempt good - tuning D&E higher power
Mar 31 1999 12:02:04:907PM	990331013	Steve Wukitch	013 plasma attempt good - tuning D&E better small h mode
Mar 31 1999 12:18:16:357PM	990331014	Steve Wukitch	014 plasma attempt good - eda H mode 0.8-1.0 s
Mar 31 1999 01:14:08:483PM	990331015	Steve Wukitch	015 plasma attempt good - longerH mode rfpower > 1 MW
Mar 31 1999 01:27:06:030PM	990331016	Steve Wukitch	016 plasma attempt good - longerH mode rfpower 1.4 MW
Mar 31 1999 01:42:22:810PM	990331017	Steve Wukitch	017 plasma attempt good -D 1.12 MW E 0.4 mW
Mar 31 1999 01:54:28:293PM	990331018	Steve Wukitch	018 plasma attempt good -D 1.12 MW E bad
Mar 31 1999 02:10:10:233PM	990331019	Steve Wukitch	019 plasma attempt good -D bay power gain calibration shot
Mar 31 1999 02:44:51:873PM	990331020	Steve Wukitch	020 plasma attempt good -D bay power gain Calibration good E good
Mar 31 1999 02:54:57:030PM	990331021	Steve Wukitch	021 plasma attempt good -D bay power higher E trps back
Mar 31 1999 03:20:45:670PM	990331022	Steve Wukitch	022 D-port timing 0.5-1.0 sec phase balance faults on D-port faulting on E-port
Mar 31 1999 03:32:20:327PM	990331023	Steve Wukitch	023 plasma EDA D-port FPA anode overload reached voltage limit on D-port probe did not appear to cause problem next shot: A and F scanning probe is not being inserted raising the plasma position by 4 mm
Mar 31 1999 03:47:58:310PM	990331024	Steve Wukitch	024 plasma EDA D-port FPA anode overload reached voltage limit on D-port
Mar 31 1999 03:55:31:560PM	990331025	Steve Wukitch	025 E-port ran without faults (to 300 kW) D-port, no scanning probe, and different faults: voltage limit and MIT arc detector
Mar 31 1999 04:17:52:827PM	990331026	Steve Wukitch	026 E-port arc-detector faults (up to 300 kW) D-port, F port scanning probe at 0.4 sec and 0.7 sec -- phase balance faults still at 0.5 and 0.8 sec -- not the probe!
Mar 31 1999 04:34:57:343PM	990331027	Steve Wukitch	027 E-port arc-detector faults D-port could not start -- too much reflected power, tune off due to rise in density retune D port for next shot
Mar 31 1999 04:59:52:717PM	990331029	Steve Wukitch	029 E-port ran cleanly up to 250 kW D-port could not start -- however tune was ok. This time the phase balance detector was tripping -- board may have gone bad.

Physics Operator Comments
Mar 30 1999 12:20:24:733PM		Steve Wolfe	Preparing for Wed run: Load seg 1 from 990305025/seg 1 Load seg 2 from 990224021/seg 2 (0.8MA fiducial-like) Eliminate TF jog, PG1 and PG5 puffs in seg2 Load/Clean into Model
Mar 31 1999 08:37:35:810AM		Steve Wolfe	Run Plan for Wednesday, 990331 MP#214 ICRF Conditioning SL: Wukitch? (or Wilson) PO: wolfe The object of this run is to get the D- and E-port systems up and running, after numerous modifications and improvements during the recent maintenance interval. Target plasmas will be fiducial-like 800kA discharges, based on 990224021. Run is scheduled to start at 08:00AM and end at 5:00PM. Following the run there will be access to the cell and power room UNDER CONTROLLED ACCESS only, for approximately 30 minutes. After that, the cell and power room will be closed overnight for boronization. Engineering Setup: ------------------ Overnight ECDC in D2, ending at least 1hour before first plasma. 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 H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled fill J-bot with 2 psi of Kr Hybrid DISABLED We would like the H2 bottle on the machine in case the H/D fraction is too low. The Neon bottle should be removed and replaced by Hydrogen. ower Systems as on 990224021. TF under Hybrid Control Enable ECE and VUV gate valves (assuming no vacuum problems) We will be starting with a Tuesday OH test, and then an EFC test. We may also do a TF-only test to check the Btor_pickup calibration last done in January. Run Plan: --------- Following the power systems tests, run target plasmas for RF. Load segment 1 from 990305025; Load segment 2 from 990224021 (remove TF jog) Tweak gaps for RF as indicated. Monitor H/D signal and pulse some H2 if indicated. We will be aiming for reliable simultaneous high power operation of the D and E port systems. This is the main purpose of the run. Piggybacking of other experiments, and alignment/checkout of new diagnostics, e.g. Z-meter array, will be carried out as long as they don't interfere with the RF development.
Mar 31 1999 08:38:07:483AM		Steve Wolfe	Coldstart run successfully 06:41:39.35
Mar 31 1999 08:24:06:373AM	990331001	Steve Wolfe	Shot 1: EFC only test - A GA-recommended ECO has been done to one gate drive board. Needs to be tested. We are having a seal leak at F-port. It's being purged with Argon. The argon is essentially the whole base pressure at 1.3e-6. There was a CAMAC problem this morning, which is claimed to be fixed now. EFC current trace looks ok.
Mar 31 1999 08:38:57:577AM	990331002	Steve Wolfe	Shot 2: TF-only test at 50kA for operations. We will be running through a series of tf tests, since we have been off-line for a while (per Irby). Ar pressure is now 6e-6! TF pulse looks good. Ar now down to 3e-6.
Mar 31 1999 08:46:00:407AM	990331003	Steve Wolfe	Shot 3: 100kA TF test. TF looks ok. Ar pressure got above 1e-5, then dropped back during INIT. We may need a cell access to re-torque F-port seal if it doesn't stabilize. Central column cooling was just started.
Mar 31 1999 08:49:51:403AM	990331003	Steve Wolfe	Base pressure is now in the high 5 scale. Some 28 is now showing up on the RGA, along with the Ar. Tommy will try to re-torque F-port.
Mar 31 1999 09:19:06:873AM	990331003	Steve Wolfe	F-port was successfully re-torqued and the seal is now being pumped. Base pressure is in the low 7 scale. Apparently the blower/heater on f-port was moved or turned down, and there is a block of ice on one side of the port. Tommy has re-set the blower.
Mar 31 1999 09:24:58:077AM	990331004	Steve Wolfe	Shot 4: Tuesday OH test. Coax resistances are < .2uohms Next shot, full current tf-only test.
Mar 31 1999 09:36:30:747AM	990331005	Steve Wolfe	Shot 5: TF only test. Data sequence on the last shot took 9 minutes! Josh is checking. No current. CAMAC wasn't enabled^&*()!
Mar 31 1999 09:46:46:530AM	990331006	Steve Wolfe	Shot 6: TF only test. looks good. Next shot, try for plasma.
Mar 31 1999 10:07:26:733AM	990331007	Steve Wolfe	Shot 7: First plasma attempt. All supplies went. NO PLASMA. fizzle. Br is very negative. -4.5mT. Next shot, change Br offset from .001 to .005
Mar 31 1999 10:21:30:123AM	990331008	Steve Wolfe	Shot 8: change Br offset from .001 to .005 (Why is it so different? ) Another fizzle. GOt to 40kA this time. A bouncer. Br looks better, starts at 0, drops to -.001 Bz looks a little slow. Gas looks a bit low as well.
Mar 31 1999 10:47:40:747AM	990331009	Steve Wolfe	Shot 9: INcrease pre-puff from 18 to 20msec Change IC_EF4 from -1285 to -1270 BR_0 from .005 to .0045 plasma full length. Serious hesitation at 52Ka level. LOoks like it swings way out, then comes back in RF up to about .1MW
Mar 31 1999 10:51:29:013AM	990331010	Steve Wolfe	Shot 10: No PCS changes. Plasma - RF tramping to .5MW. Both transmitters are running, together. Startup looks cleaner this time, no hesitation. EFIT did not run on shot 9. Problem was traced to Bad sequence value in the EFIT action. Josh had accidentally modified it when he was trying to recover a bad data file. With Josh's help, recovered the correct sequence expression from an old shot. It ran ok this time.
Mar 31 1999 11:09:34:670AM	990331011	Steve Wolfe	Shot 11: No pcs changes. Shit shooter gate valve open; they will inject Sc at 1.1sec plasma . I see no injection on the 2pi. One tranmitter is faulting repeatedly, the other stays on. Peak power 1.3MW looks like some gas evolution from the antenna (density rise) startup still looks ok.
Mar 31 1999 11:34:15:937AM	990331012	Steve Wolfe	Shot 12: No changes. plasma One transmitter still faulting. shit shooter injection at 0.3sec; John's mumbling about it penetrating better when it's not diverted.
Mar 31 1999 11:52:14:373AM	990331013	Steve Wolfe	Shot 13: No changes. JR adjusted the laser voltage; still firing at 0.3sec plasma small injections at 0.28 and .54, neither of which is John's. RF stays on (1 glitch) up to nearly 1MW. short H-mode at 0.97 sec.
Mar 31 1999 12:08:20:373PM	990331014	Steve Wolfe	Shot 14: No changes. JR readjusted laser voltage for shit shooter. plasma - hmode at .85sec; looks EDA TCI signal goes berserk. Irby has repaired it. There is a problem on D-port data. No net RF power trace. Shit shooter injection at .3 sec is back.
Mar 31 1999 12:19:17:717PM	990331014	Steve Wolfe	The interferometer has a problem. Irby and Murray will have to go into the cell. Meanwhile, Mike and Sergei are in the power room.
Mar 31 1999 01:12:56:950PM	990331015	Steve Wolfe	Shot 15: TCI repair took about 45 minutes. No PCS changes (probably should raise the pre-puff, but let it go). plasma, 2 h-modes, first one seems to have had an injection in it. Still some faulting on the rf, but not as bad as earlier. TCI still has a problem. Slight hesitation at the 52kA level.
Mar 31 1999 01:25:04:840PM	990331016	Steve Wolfe	Shot 16: No changes. plasma, h-mode, looks EDA. RF up to 1.3MW Next shot, a little Kr for Goetz
Mar 31 1999 01:42:31:560PM	990331017	Steve Wolfe	Shot 17: Enable J-bot 20msec Kr pulse at .40sec plasma, h-modes (Bart mode). Prad looks higher, could be the Kr RF data problem again. Mike says 1.12MW from D, .4 from E. Turn off the Kr next shot.
Mar 31 1999 01:56:45:670PM	990331018	Steve Wolfe	Shot 18: Gary and Bill are going to turn on the TF I2t for next shot. J-bot disabled for next shot. FSP will fire three times this shot; they will try to see it on video (prep for plume imaging). plasma, h-mode, nice EDA. RF just over 1MW. Sanjay sees the probe (at least twice).
Mar 31 1999 02:13:58:950PM	990331019	Steve Wolfe	Shot 19: No changes. RF will fire D only for calibration. plasma, H-mode Got a nice ski slope ramp on the RF power. H-mode is late, .92 sec, when Prf is 1MW. Injection at .6sec. Brian claims it's not his probe.
Mar 31 1999 02:39:26:687PM	990331020	Steve Wolfe	Shot 20: No changes. Br did look a little bit more negative on 19, but I'm resisting the temptation to tweak it. Prior to this shot, DAIGLE had a problem and had to be rebooted. plasma. H-mode EDA with a couple of injections. RF up to 1.5MW.
Mar 31 1999 03:02:56:857PM	990331021	Steve Wolfe	Shot 21: No changes. RF is going to shift the timing of D and E to investigate the E trips. plasma, h-mode. nice long EDA. RF up to 1.5MW, some dropouts. Josh had to kill MHERTZ. Back up now.
Mar 31 1999 03:13:22:700PM	990331022	Steve Wolfe	Shot 22: No changes plasma, h-mode. Big injection at .65sec, during the H-mode. RF gets to 1.7MW, then starts faulting. RF is blaming the FSP for some RF faults; there's a switch!
Mar 31 1999 03:23:05:233PM	990331023	Steve Wolfe	Shot 23: No changes. plasma, h-mode, RF trips. Next shot, raise the plasma by 4mm for Dmitri.
Mar 31 1999 03:41:58:030PM	990331024	Steve Wolfe	Shot 24: Raise ZCUR and ZXU by 4mm during the flattop; this is to give Dmitri better coverage of the pedestal at the top. Both probes disabled this time. plasma, hmode, RF trips. RF faults, gets up to 1.5MW, Looks like the height change worked.
Mar 31 1999 03:51:47:997PM	990331025	Steve Wolfe	Shot 25: repeat with the raised position. plasma, hmode, long eda. Looks like the shit shooter is working again. RF gets to 1.6MW. Still has one fault episode on E at .58 sec, but FSP wasn't firing.
Mar 31 1999 04:05:58:280PM	990331026	Steve Wolfe	Shot 26: repeat with the raised position. Brian wil fire at 0.7sec this time. plasma, hmodes. Big injection at 0.8sec. JR successfully injected zirconium!
Mar 31 1999 04:31:10:497PM	990331027	Steve Wolfe	Shot 27: raise density to 1.31, increase gain from 4 to 8, small increase in pg3 voltage add a tf waggle for Amanda at 0.81 - 0.92 RF moving 100msec earlier. plasma, rf continually tripping, no hmodes. Got 1.3e20, sharkfin at the end. Next shot, same density, D-port moved later (.6sec) and hopefully better tune.
Mar 31 1999 04:40:50:733PM	990331028	Steve Wolfe	Shot 28: repeat with different rf. fizzle. gets to 42kA and hits someplace. probably just too much gas load from previous shot. Br is also a little positive.
Mar 31 1999 04:56:23:590PM	990331029	Steve Wolfe	Shot 29: Drop Br0 from .0045 to .004; drop pre-puff from 20 msec to 18msec. plasma, D-port still didn't go, Eport did. No hmode. End of run. There will be no runs tomorrow or Friday so that the RF people can work on their system(s).

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:16:41:810AM	Test	Ok	EFC Okay
2	08:32:07:530AM	Test	Ok	Tf test shot only 50,000 amps
3	08:42:53:827AM	Test	Ok	TF test only 100,000 amps
4	09:20:14:373AM	Test	Ok	OH Test. Values okay.
5	09:32:26:090AM	Test	Bad	No camac enabled.
6	09:44:50:077AM	Test	Ok	TF Looks okay
7	10:01:12:357AM	Plasma	Ok	No Faults
8	10:14:40:577AM	Plasma	Ok	fizzle
9	10:27:43:437AM	Plasma	Ok	Plasma
10	10:45:02:610AM	Plasma	Ok	plasma
11	11:05:09:560AM	Plasma	Ok	plasma
12	11:28:15:763AM	Plasma	Ok	(null)
13	11:46:28:640AM	Plasma	Ok	plasma
14	12:00:40:140PM	Plasma	Ok	no faults/plasma
15	01:04:18:733PM	Plasma	Ok	No Faults
16	01:19:47:357PM	Plasma	Ok	No Faults
17	01:34:03:860PM	Plasma	Ok	No Faults
18	01:48:51:873PM	Plasma	Ok	No Faults
19	02:06:16:640PM	Plasma	Ok	No Faults
20	02:34:48:653PM	Plasma	Ok	No Faults
21	02:47:44:453PM	Plasma	Ok	No Faults
22	03:05:05:827PM	Plasma	Ok	No Faults
23	03:19:15:403PM	Plasma	Ok	No Faults
24	03:32:34:623PM	Plasma	Ok	No Faults
25	03:46:59:263PM	Plasma	Ok	No Faults
26	04:01:17:657PM	Plasma	Ok	No Faults
27	04:23:26:590PM	Plasma	Ok	No Faults
28	04:36:17:357PM	Plasma	Ok	No Faults
29	04:50:03:420PM	Plasma	Ok	No Faults