Miniproposals

Miniproposal: 622 Date Filed: 11/18/2010 Title: Molybdenum nano-filament growth in the Alcator C-mod outer divertor First Author: Graham Wright Session Leader: Graham Wright (shots 1-39)

Engineering Operator Run Comment

MP622 - Molybdenum nano-filament growth in the Alcator C-mod outer diver

Session Leader Plans

Entered: Apr 6 2011 07:54:14:303AM

Author: Graham Wright

Shot plan: Ideal conditions are surface temperatures of >1000 K at the ODIV ramped nose tiles (J cassette). ST will be measured via IR analysis. L-mode plasmas are needed to get power to the divertor plates. ODIV Te should be <15 eV to minimize sputtering to allow fuzz growth, so densities should be in the high range (no cryo pump needed). 5.4 T so reasonable flat-top and inter-shot times are available to accumulate total growth time for the day. Power is injected with ICRF only and as much as possible without LH transition. Model shot (in D2) is 1100303031 but magnetics have been adjusted since then so the strikepoint position (desired on the nose tile) will likely need to be adjusted from this configuration. He flux is not a major factor in fuzz growth rates so there is no need to push the plasma current or ionization (800 kA is adequate) Shots 1-2: - ICRF conditioning, strike point positioning (strike point on nose tile) - High density (NL04 ~1.1 e20) in He - 800 kA - 5.4 T Shot 3: - ICRF ramp from 2-3.5 MW during flat-top at 1.1e20 density to check for LH transition (want to stay in L-mode) Shot 4-6: - Adjust ICRF injection power and (time) profile to achieve optimal surface temperature as early in the flat-top as possible - Small adjustments to density may be needed as well. Shot 7-end (extended run day until 18:00): - Repeat optimized shot as many times as possible to accrue growth time for surface filaments.

Physics Operators Plans

Entered: Apr 5 2011 09:35:47:287PM

Author: Ron Parker

PO Plan for 1110406 MP622 - Molybdenum nano-filament growth in the Alcator C-mod outer divertor SL: G. Wright PO: R. Parker Run begins at 09:00 and ends at 18:00 ----------------- Engineering Setup ----------------- Power systems as on:1110207004 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi He Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi He Hybrid enabled (PG3) fill NINJA as is Enable gate-valves and shutters: ECE, VUV, Xeus Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes, in HELIUM ICRF(yes/no): yes, all antennas LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 5e-5 Torr (Normal for Helium) sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Apr 7 2011 05:14:51:897PM

Author: Graham Wright

For a day we wanted to accumulate as much plasma exposure time as possible we lost 21 shots due to: fizzles = 7 Disruptions = 6 Runaway shutdowns = 5 Controls issues = 3 We had a total of 12 shots at appropriate conditions for fuzz growth. Including the first ~200 ms of rampdown at which the surface temperature was still elevated, this corresponds to 10-12 s of total fuzz growth time The growth conditions achieved were from a high-density (NL04~1.4e20) He discharge (start-up in D2) with 3.25 MW of ICRF power during the flat-top and slightly into the ramp down (0.5-1.7 s). This gave us L-mode discharges with temperatures at the edge in the range of 15-25 eV (slightly higher than our target edge Te of 10-15 eV). Surface temperatures were typically increasing from 900-1100 K at the hottest position throughout the flat-top. These conditions were repeated for shots 26-39 with disruptions at shots 28 (at 0.5 s before growth conditions achieved) , 33 (at 0.77 s before growth conditions achieved), and 39 (20 ms before ramp-down, so nearly a full flat-top at growth conditions). It is not clear the effect of the disruptions on possible fuzz growth but disruptions for shots 33 and 39 showed only small surface temperature spikes indicating that disruptions did not strike near the ramped tiles.

Physics Operator Summaries

Entered: Apr 6 2011 08:08:48:760PM

Author: Ron Parker

This turned out to be a difficult run. The shot plan called for repeatable 0.8-1.0 MA, 5.4 T, nel04 ~ 1.2-1.4e20 in helium, with 2-4 MW of ICRH power. Initially, segment 1 was loaded from a helium run in February, shot 1110207003, while segment 2 was loaded from 1100303031 at the SL's request. The first shot actually ran well, lasting into rampdown. The second shot fizzled, and then the problems began. Shot 3 ended up being a no power shot due to a hangup in the shot sequence, and the next 15 shots either disrupted before rampdown (shots 6,7,10 and 15-18), fizzled (shots 4,5,8,13,14), or had engineering issues (shots 11,12.) The single marginally useful shot in this sequence was shot 9, which made it into rampdown. Most of the problems encountered during this extended discharge development phase were due to the difficulty starting up in helium, which generally resulted in fizzles or early disruptions associated with strong runaway production. Beginning with shot 15, the PO decided to start up in D2 and use helium for density control (PG4.) However, it took some tuning using PG3,which was programmed to open near the time of commutation, to prevent runaways and early disruptions. Using the PG3 waveform developed for the 1110207 run was ineffective since D2 rather than He was being used for the breakdown and early startup. At the suggestion of Jim Irby, the PG3 waveform recently used for D2 discharges was used for early helium injection. After a little tuning of the PG4 pulse length, reliable startups were obtained for the rest of the run. As time went on, it was found that adding additional gas for the prepulse seemed to further improve the startup by eliminating early runaways. After tuning the density demand and increasing the ICRH power to ~ 3+ MW, the conditions required by the SL's plan were finally achieved, regrettably for only 12 shots. Hopefully these will be sufficient to determine whether the "fuzz" seen in helium discharges in linear machines is or is not a possible issue for tokamaks. Scorecard: 39 attempts at plasma, 3 failed shots due to engineering issues, 7 fizzles, 10 disruptions before ramp down and 19 shots lasting into rampdown.

Session Leader Comments
Apr 6 2011 09:13:23:517AM	1110406001	Graham Wright	Full shot Strike point sits on nose tile but sweeps up into USN near the end of flat top. RF power looks stable but ODIV Te is ~30 eV so density will have to be raised. Try 1.3 e20 NL04 for next shot IR camera saturated so ne temperature feedback
Apr 6 2011 09:19:04:410AM	1110406002	Graham Wright	fizzle
Apr 6 2011 09:31:39:907AM	1110406003	Graham Wright	no power shot
Apr 6 2011 09:46:45:277AM	1110406004	Graham Wright	fizzle
Apr 6 2011 10:06:38:260AM	1110406005	Graham Wright	fizzle
Apr 6 2011 10:23:07:360AM	1110406006	Graham Wright	Start-up was successful but disrupts at ~300 ms.
Apr 6 2011 10:42:55:260AM	1110406007	Graham Wright	Reached flat-top after a blip in plasma current during ramp up. Strike point positioning looked good although still swept up near the end of flat-top 2 MW ICRF looked stable. Disrupts (1 MA) at ~1.37 s ODIV Te still at ~30 eV during flat-top with NLO4 1.2e20 but drops down to ~10 eV just before disruption when the density increased to ~1.4e20 and plasma starting moving up into USN IR camera shows temperature turning over before end of shot, likely due to increasing density and dropping ODIV Te
Apr 6 2011 10:44:58:043AM	1110406008	Graham Wright	fizzle (post-disruption?)
Apr 6 2011 11:08:21:013AM	1110406009	Graham Wright	Good shot with 1 s flat-top. Small disruption during ramp down. ODIV Te still quite high even with increased density. Difficult to increase the denisty more since we are limited to how quickly we cn ramp it up. We will try nudging the density up a little more but we may need to pull back on the ICRF power if density increase don't help enough. IR camera shows max surface temperatures in excess of 1100 K so we are in our target growth region assuming it is not being all sputtered away.
Apr 6 2011 12:14:35:723PM	1110406010	Graham Wright	Full current (1 MA) disruption at ~1.28 s. ODIV Te was down to ~15 eV as NL04 ramped up to 1.4e20 so that is improving but will have to check how that impacted peak Te. Will try again at same density Disruption caused by running out of V-s and plasma becoming vertically unstable. Max V-s is moved upwards to give us more operating room
Apr 6 2011 11:34:42:867AM	1110406011	Graham Wright	no TF
Apr 6 2011 12:15:03:913PM	1110406012	Graham Wright	No TF again TF was accidentally disabled while modifying the Max V-s. Fixed now.
Apr 6 2011 11:45:24:900AM	1110406013	Graham Wright	fizzle
Apr 6 2011 12:00:58:237PM	1110406014	Graham Wright	fizzle Whoever has the C-Mod voodoo doll, please stop sticking it with needles. Thanks.
Apr 6 2011 12:19:03:017PM	1110406015	Graham Wright	Runaway shut down
Apr 6 2011 12:37:25:553PM	1110406016	Graham Wright	runaway shutdown
Apr 6 2011 12:42:10:243PM	1110406017	Graham Wright	runaway shutdown
Apr 6 2011 12:57:23:960PM	1110406018	Graham Wright	more of the same
Apr 6 2011 01:33:32:397PM	1110406019	Graham Wright	Plasma! Full flat-top but disruption right at beginning of ramp down. ODIV Te is 15-20 eV, when density got up to 1.3-1.4e20, but low density early in the shot means high Te then. Temperature (max) is pretty flat from 0.7-1.5 s at ~700 C Fill in density at ~0.5 s and it should be promising
Apr 6 2011 01:35:46:800PM	1110406020	Graham Wright	Same shot and similar result. Need to fill in early shot density more. Surface temperatures are a bit down, possibly due to reduced plasma current (900 kA). ODIV Te looks similar with high Te early in the shot than more manageable Te from 1 s to rampdown.
Apr 6 2011 01:35:54:017PM	1110406021	Graham Wright	fizzle
Apr 6 2011 01:46:57:453PM	1110406022	Graham Wright	runaway shutdown
Apr 6 2011 02:09:44:483PM	1110406023	Graham Wright	Full flat-top but disrupting right at ramp down due to density running away. Denisty is filling in a bit more but higher density at 0.5 s would help keep ODIV Te down early in the shot. Next shot, small ramp-down of ICRF (1.4-1.5 s) near end of shot to help transition to rampdown.
Apr 6 2011 02:42:44:243PM	1110406024	Graham Wright	Stable flat-top but still disrupting at rampdown. This time try extending ICRF out to 1.7 s (rampdown at 1.6 s) Bring early density a bit and late denisty down slightly to try for a flatter density profile for the shot. Temperatures are similar to shot 23 (maxing out at 600 C and hotspot)
Apr 6 2011 02:41:09:183PM	1110406025	Graham Wright	Density still taking off as soon as ICRF ramp down starts and disrupting plasma. Denisty profile is basically flat at 1.4e20 from 0.75 s to rampdown. Looks good and keeps ODIV Te down in the 15 eV range Surface temperature is too cold. Only ~500 C or so, try increasing ICRF to 3 MW early and ramping down to 2.5 MW at current rampdown.
Apr 6 2011 03:02:15:940PM	1110406026	Graham Wright	Stable flat top and ramp down to 400 kA before disrupting the rest of the way. No H-mode despite increase in ICRF power (3MW ramping down to 2.5 MW). ODIV Te increases to ~20 eV but may be the best we can do with limited time left. Max temp on tile surfaces is 600-700 C. Try higher ICRF so area of appropriate temperature is higher and duration at the appropriate temperature is longer. This will help with accumulation of growth time. Next shot: ICRF 3.25 MW flat from 0.5-1.7 s
Apr 6 2011 03:39:59:277PM	1110406027	Graham Wright	No H-mode despite 3.25 MW ICRF. Rampdown to 450 kA before disruption. ODIV Te moving from 25-20 eV through shot. Raw data for surface temperatures look good. This may be our sweet spot. Run it again. Max surface temperatures are ramping up from 600-800 C from 0.8-1.6 s
Apr 6 2011 03:23:36:317PM	1110406028	Graham Wright	Disrupted at 0.5 s just as ICRF came on.
Apr 6 2011 03:38:26:093PM	1110406029	Graham Wright	Full flat-top with small disruption (400 kA during ramp down). ODIV Te 25-20 eV throughout shot. Looks good for a post-disruption shot.
Apr 6 2011 03:52:02:103PM	1110406030	Graham Wright	Good shot with rampdown to ~300 kA before disruption Raw data from IR camera identical from shot 29 ODIV Te 25-20 eV throughout shot
Apr 6 2011 04:16:13:770PM	1110406031	Graham Wright	Current profile very similar to 30 (rampdown to ~300 kA disruption) ODIV Te looks the same Surface temperature is slowly increasing, perhaps indicating some temperature racheting from shot to shot. Now reaching almost 1000 C at max
Apr 6 2011 04:25:39:690PM	1110406032	Graham Wright	Same Ip profile. ODIV Te may be slightly higher by 2-3 eV but still between 25-20 eV from ~0.7-1.5 s Surface temperatures have decreased a bit. This may be due to camera alignment though. Still reaching almost 800 C at max.
Apr 6 2011 04:33:23:563PM	1110406033	Graham Wright	disruption at ~0.7 s
Apr 6 2011 04:54:13:817PM	1110406034	Graham Wright	Full shot until ~500 kA disruption from rampdown. Recovered nicely from previous shot. ODIV TE has moved slightly down again to 25-15 eV throughout the shot. Surface temperatures look good. Maxes still ramping up from 600-800 C
Apr 6 2011 05:18:33:937PM	1110406035	Graham Wright	Full shot with ~450 kA disruption during rampdown ODIV Te looks similar to shot 34 Surface temperatures also similar to shot 34
Apr 6 2011 05:23:47:620PM	1110406036	Graham Wright	Full shot with ~350 kA disruption during rampdown. ODIV Te moves from 25-20 eV throughout the shot. Surface temperatures seem to be slowly decreasing from shot to shot? Max temps just under 800 C now.
Apr 6 2011 05:39:58:000PM	1110406037	Graham Wright	Looks good (normal small disruption at rampdown, typical ODIV Te) Surface temperatures are back up to 800-900 C
Apr 6 2011 05:55:21:997PM	1110406038	Graham Wright	Looks good (Ip profile and ODIV Te are normal) Surface temperatures similar to 37
Apr 6 2011 06:11:03:507PM	1110406039	Graham Wright	Disruption for last shot (of course) just before ramp down. ODIV Te looks normal. Surface temperatures look good. Now large spikes in surface temperature corresponding to disruption so the fuzz may yet live on.

Physics Operator Comments
Apr 6 2011 08:55:25:073AM	1110406001	Ron Parker	This will be the last scheduled run for this campaign. Segment 1 was loaded from shot 1110207004, which was a helium run, just before field reversal. Segment 2 was loaded from shot 1100303031, a shot with outer strike point on the divertor nose.
Apr 6 2011 09:17:56:833AM	1110406001	Ron Parker	Shot 1 ran fairly well, but there were programmed ramps in ZXL and ZXU that caused the shot to go upper null at about 1.3 s. For the next shot, we'll take these ramps out.
Apr 6 2011 09:18:07:633AM	1110406002	Ron Parker	Fizzle
Apr 6 2011 09:30:27:063AM	1110406003	Ron Parker	A hangup in the control system -- "entering ENIT" repeatedly.
Apr 6 2011 09:31:31:293AM	1110406003	Ron Parker	No power shot
Apr 6 2011 09:36:48:060AM	1110406003	Ron Parker	Waiting for Josh to identify problem causing hangup. Meanwhile, I loaded 1110207014 which should have a more reliable startup, based on PO's log for that run day.
Apr 6 2011 09:59:33:927AM	1110406004	Ron Parker	Fizzle. Likely too much or too little prefill gas. Next: reduce prefill by 3 ms
Apr 6 2011 10:23:09:763AM	1110406005	Ron Parker	Slightly more current, but still fizzled. Next: reduce prefill by 2 more ms.
Apr 6 2011 10:22:15:893AM	1110406006	Ron Parker	Shot 6 started up with gas reduced 2 more ms. It disrupted at 31 ms -- density ramp too fast?
Apr 6 2011 10:54:24:650AM	1110406007	Ron Parker	Shot 7 disrupted at 1.36 s Steve thinks density rises too fast, so the density fb gain will be reduced to 2.5 and the programmed rate of rise reduced.
Apr 6 2011 10:51:14:880AM	1110406008	Ron Parker	Shot 8 was a fizzle
Apr 6 2011 11:07:29:740AM	1110406009	Ron Parker	Shot 9 was better, still disrupted in rampdown at half current. SL wants density increased, so program nl04 = 1.3e20 m-2.
Apr 6 2011 11:18:06:923AM	1110406010	Ron Parker	Shot ran to 1.3 s, then disrupted Next: run again, but fizzle?
Apr 6 2011 11:27:08:400AM	1110406011	Ron Parker	No TF!
Apr 6 2011 11:36:15:153AM	1110406012	Ron Parker	Another no TF "shot"
Apr 6 2011 11:52:26:807AM	1110406013	Ron Parker	PD fizzle. Restore gas pulse to 22 ms
Apr 6 2011 12:01:49:190PM	1110406014	Ron Parker	Fizzle. Let's go to a deuterium startup
Apr 6 2011 12:14:24:653PM	1110406014	Ron Parker	Switch to D2 prefill, need to adjust pg 3 if runaways
Apr 6 2011 12:35:28:990PM	1110406015	Ron Parker	Runaway shutdown
Apr 6 2011 12:34:52:170PM	1110406016	Ron Parker	Another early disruption. Runaways are an issue -- try to find waveform for PG3 to kill them.
Apr 6 2011 12:49:20:820PM	1110406017	Ron Parker	Early disruption. Next: Copy PG3 waveform (for D2) from 1110329022 into PG3 (for He) for next shot
Apr 6 2011 01:05:15:283PM	1110406018	Ron Parker	Same thing, but PG3 waveform not loaded
Apr 6 2011 01:17:49:560PM	1110406020	Ron Parker	Useful shot, but disrupted at rampdown.
Apr 6 2011 01:24:22:653PM	1110406020	Ron Parker	Shot ran OK, still disrupting during rampdown. Next: Cut density program off at 1.35 s
Apr 6 2011 01:36:16:720PM	1110406021	Ron Parker	Fizzle, add 2 ms more prefill
Apr 6 2011 01:53:48:963PM	1110406022	Ron Parker	Early disruption, with runaways. Increase PG4 to 30 ms (add 3ms more)
Apr 6 2011 02:30:45:240PM	1110406023	Ron Parker	Shot 23 ran into rampdown
Apr 6 2011 02:30:59:937PM	1110406024	Ron Parker	Shoit 24 ran into rampdown
Apr 6 2011 02:33:52:670PM	1110406025	Ron Parker	Shoit 25 ran into rampdown Some early runaways -- increase prefill by 2 ms.
Apr 6 2011 02:50:14:857PM	1110406026	Ron Parker	Shot 26 ran half way into rampdown -- progress
Apr 6 2011 03:06:16:923PM	1110406027	Ron Parker	Shot ran halfway into rampdown. Runaways appear early, increase D2 fill by 2 ms
Apr 6 2011 03:25:55:230PM	1110406028	Ron Parker	Shot 28 disrupted early, at ~ 0.5 s. No runaways, no obvious problem.
Apr 6 2011 03:37:26:190PM	1110406029	Ron Parker	Shot came back, still disrupts halfway in rampdown
Apr 6 2011 03:49:59:993PM	1110406030	Ron Parker	Same shot -- watching the fuzz grow
Apr 6 2011 04:24:01:847PM	1110406031	Ron Parker	Shot 31 ran half way into rampdown
Apr 6 2011 04:34:08:630PM	1110406032	Ron Parker	Shot 32 ran half way into rampdown
Apr 6 2011 04:35:16:783PM	1110406033	Ron Parker	Shot 33 disrupted at .77 s
Apr 6 2011 04:53:37:770PM	1110406034	Ron Parker	Shot 34 came back, disrupting in rampdown
Apr 6 2011 05:02:28:290PM	1110406035	Ron Parker	Shot 35 ran halfway into rampdown
Apr 6 2011 05:16:10:290PM	1110406036	Ron Parker	Shot ran into rampdown
Apr 6 2011 05:45:53:213PM	1110406037	Ron Parker	Shot 37 ran into rampdown
Apr 6 2011 05:45:29:033PM	1110406038	Ron Parker	Shot 38 ran into rampdown
Apr 6 2011 07:24:30:303PM	1110406039	Ron Parker	Shot 39 disrupted at beginning of ramp down.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:58:40:383AM	Plasma	Ok
2	09:13:30:050AM	Plasma	Ok
3	09:26:31:973AM	Plasma	Bad	Igor fault
4	09:44:10:867AM	Plasma	Ok
5	10:02:45:270AM	Plasma	Ok
6	10:15:15:123AM	Plasma	Ok
7	10:28:29:723AM	Plasma	Ok
8	10:41:06:440AM	Plasma	Ok
9	10:53:41:780AM	Plasma	Ok
10	11:07:39:577AM	Plasma	Ok
11	11:24:37:193AM	Plasma	Bad	TF Magnet Resistance Fault
12	11:34:14:400AM	Plasma	Ok	TF disabled by Engineering Operator shot 11
13	11:42:22:780AM	Plasma	Ok
14	11:54:52:450AM	Plasma	Ok
15	12:13:57:677PM	Plasma	Ok
16	12:26:44:500PM	Plasma	Ok
17	12:39:40:720PM	Plasma	Ok
18	12:52:32:073PM	Plasma	Ok
19	01:05:12:040PM	Plasma	Ok
20	01:17:45:213PM	Plasma	Ok
21	01:31:04:260PM	Plasma	Ok
22	01:44:29:320PM	Plasma	Ok
23	01:56:55:647PM	Plasma	Ok
24	02:12:14:683PM	Plasma	Ok
25	02:25:00:883PM	Plasma	Ok
26	02:41:15:960PM	Plasma	Ok
27	03:01:16:040PM	Plasma	Ok
28	03:19:03:173PM	Plasma	Ok
29	03:31:09:800PM	Plasma	Ok
30	03:44:39:647PM	Plasma	Ok
31	04:00:38:460PM	Plasma	Ok
32	04:14:48:933PM	Plasma	Ok
33	04:29:29:683PM	Plasma	Ok
34	04:43:52:017PM	Plasma	Ok
35	04:59:19:967PM	Plasma	Ok
36	05:13:31:667PM	Plasma	Ok
37	05:27:44:200PM	Plasma	Ok
38	05:42:16:720PM	Plasma	Ok
39	05:59:27:663PM	Plasma	Ok

System Availability

Apr 6 2011 08:58:21:593AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes BES system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (D+F) working. All midplane and off-midplane diode arrays working except WB1AX. Midplane foils calibrated and PRAD_MAIN is being filled. Divertor/Ledge foils not yet ready. Jul 15 2010 08:27AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Nov 16 2010 02:36PM (dekow) Jim Irby Boronization dekow,irby CNPA yes Multiple channel CNPA available Oct 21 2010 07:11PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Shut down. Helium dewar removed. LN2 manual valve and solenoid valves are closed and tagged. Apr 06 2010 10:51AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes Wide-view CXRS system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes system is aligned; new calibrations (relative brightness and position) not yet implemented Jun 29 2010 10:27AM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation yes operational, but turned off Nov 03 2009 04:59PM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 06 2007 10:50AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 06 2007 10:51AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DNB no in test mode only Nov 03 2009 05:01PM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung ECDC yes Operational Jun 26 2010 09:28PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes All channels working and calibrated. Oct 27 2010 03:41PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauges are operational. Jun 28 2010 08:02PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no Plugs for Power Supply and Controls have been unplugged and red tagged making system safe for In-Vessel Access. Apr 05 2010 11:18AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes operating normally Jun 29 2010 10:26AM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Jun 26 2010 11:19PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36PM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes System installed and aligned. Inverted Profiles for Ti are available upon request. Vtor profiles still under revision. Dec 17 2010 09:25AM (ypodpaly) John Rice High Resolution X-Ray ince,rice,ypodpaly HXR yes 32 Channels operational Oct 23 2010 01:41PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna yes system checked out ok on 11006728. Jun 28 2010 04:57PM (ylin) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes system checked out ok on 1100628 Jun 28 2010 04:57PM (ylin) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes system checked out ok. conditioned to vacuum. Jun 28 2010 04:58PM (ylin) Steve Wukitch J-port antenna wukitch,ylin Laser Blow-Off yes operational and tested Jul 20 2010 04:42PM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid yes LH working. New directional couplers installed at input to each klystron. Oct 21 2010 11:42AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer yes 50GHz: up-, 60 GHz up- and down- Oct 21 2010 11:31AM (sgbaek) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek Lower Hybrid SOL reflectometer yes profiles and fluctuations both working. If requested, please request LH launcher to be moved in. Jan 18 2011 03:07PM (cornwall) Cornwall Lau Lower Hybrid SOL reflectometer cornwall,wukitch,ylin LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha no WB4LY and LLY working but not during ICRF. WB1LY not attached due to pickup problems. LYMID attached but have profile problems. Aug 24 2010 09:17AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes vacuum problems fixed, still no wavelength scan - just used as a Mo/Cu/Ni/Fe/Ti monitor. Mar 25 2011 08:25AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes Gauges are operational Jun 28 2010 08:02PM (labombard) Brian LaBombard Baratron pressure gauges labombard MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE no As of 6/10/09, MSE is calibrated & ready to go. Awaiting DNB. Jun 10 2009 10:34AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes All systems are on and functional Jun 29 2010 12:56PM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes PMT Neuts_hards, ssd_x01, ssd_x02, ssd_x03 Jun 26 2010 09:21PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA no Capillaries tested in-vessel. Jun 28 2010 08:08PM (labombard) Brian LaBombard NINJA gas puff labombard,terry PCI yes Operational. Mar 29 2011 08:34AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges no High voltage power supplies are turned off, waiting for work at A-port horizontal to be finished. Jun 28 2010 08:07PM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Jun 26 2010 11:19PM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes   Jun 26 2010 11:19PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Jun 26 2010 11:19PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Jun 26 2010 11:20PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational. Jun 28 2010 08:03PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational. Jun 28 2010 08:03PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes F and J outer divertor probes are operational. Jun 28 2010 08:04PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Operational, except probe#13 Jun 28 2010 08:04PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer no Starting 1110309xxx all channels were operational. On 1110323018 the 75 RCVR was lost. Mar 25 2011 09:19AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Operational. New Langmuir-Mach probe head installed. Jun 28 2010 08:05PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. Jun 28 2010 08:05PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes Both A and K units are operational. Coil polarity needs to be checked. Jun 28 2010 08:06PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Sparker yes HV supply on, cable run to sparker at k-hor Jun 23 2010 02:41PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station yes SSS installed and leak tested. Oct 21 2010 11:31AM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes No new CO2 detector, so still missing edge channels Jun 23 2010 02:40PM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with 2 lasers Oct 22 2010 01:06PM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma TS - Edge yes Operational Jul 14 2010 11:54AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XEUS yes Raw spectra stored but not line brightness time histories are going into the tree yet. Jan 20 2011 10:45AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer mlreinke XTOMO yes Core system working. Edge system waiting for H-modes. Jul 01 2010 11:55AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke