Miniproposals

Miniproposal: 663 Date Filed: 9/6/2011 Title: Using alternate limiting surfaces with LHCD First Author: Greg Wallace Session Leader: Greg Wallace (shots 18-29)

Miniproposal: 665 Date Filed: 9/6/2011 Title: Field, Current and q-dependence of the LH Density Limit First Author: Ron Parker Session Leader: Syunichi Shiraiwa (shots 1-17)

Engineering Operator Run Comment

MP665, LHCD at reduced torodal field, MP 663, LHCD with alternate limiti

Session Leader Plans

Entered: Jul 23 2012 10:55:19:833AM

Author: Greg Wallace

Session Leader plan for 1120724 Miniproposal 663: Using alternate limiting surfaces with LHCD Session Leader: G. Wallace Physics Operator: E. Marmar Toroidal Field: 5.4 T Plasma Current: 800 kA Working Gas Species: D2 Density: nebar = 0.75x1020 to 1.5x1020 Boronization Requested (if yes, specify whether overnight or between-shot, how recently needed, and any special conditions.): No Equilibrium configuration (if possible, refer to database equilibria): 1091016019 and 1040326021 ICRF Power, pulse length, phasing: None LHCD Power, pulse length, phasing: 600+ kW, n||=1.9 (90 deg), 0.6-1.4 s Pellet Injection (species): None Impurity blow-off injection: None Diagnostic Neutral Beam: Yes Special gas puffing: None Cryopump: Yes Non-axisymmetric Coils (Connections, Current): Usual configuration. Required diagnostics: Magnetics, TCI, Thomson, ECE set up for 5.4 T with non-thermal views, HXR camera, X- and O-mode reflectometers, B-port Ly-alpha array, divertor and scanning probes set up for LH wave measurement. 1) Develop upper divertor limited discharge. Start with 1091016019. Set Ip = 800 kA, Bt = 5.4 T. Increase ZXU such that upper x-point moves beyond the upper divertor plate (may also require adjustments of ZCUR and ZXL to keep elongation within limits). Adjust RXU such that limiting point is on 2 tiles mounted just inward from divertor slots. Maintain inner gap of 1-1.5cm and outer gap of 1-1.5cm during flat top. Ramp line averaged density from 0.75-1.5x1020 m-3 between 0.9 and 1.3 s. Apply 600 kW of LH power at n||=1.9 from 0.6-1.4 s. May need to repeat to get full density range or to keep LH from faulting. (3-5 shots) 2) Sweep ZXU dynamically during LH pulse to move from limited to diverted discharge. Keep line averaged density constant at 1.0x1020 m-3. Repeat at nebar = 1.4x1020 m-3. (2-3 shots) 3) Repeat reverse of step 3 (diverted to limited). (2-3 shots) 4) Develop nose limited discharge. Load equilibrium from 1040326021. Set Ip = 800 kA, Bt = 5.4 T. Decrease RXL such that the plasma becomes limited on the nose. Ramp line averaged density from 0.75-1.5x1020 m-3 between 0.9 and 1.3 s. Apply 600 kW of LH at n||=1.9 to discharge from 0.6-1.4 s. May need to repeat to get full density range. (3-5 shots) 5) Sweep RXL dynamically during LH pulse to move from limited to diverted discharge. Keep line averaged density constant at 1.0x1020 m-3. Repeat at 1.4x1020 m-3. (2-3 shots) 6) Repeat reverse of step 7 (diverted to limited). (2-3 shots) 7) (If time allows) Standard USN diverted discharge with LH for comparison with discharges in step 1. Repeat plasma from 1120523013. 8) (If time allows) Inner wall limited discharge with LH for comparison with discharges in step 1. Repeat plasma from 1120612015, but change Ip to 800 kA.

Entered: Jul 23 2012 05:06:22:830PM

Author: Seung Gyou Baek

MP 665: SL. S.G. Baek, S. Shiraiwa (S. Shiraiwa will be a session leader) PO. E. Marmar The goal of this run is expand our data base set to better characterize the condition when "density limit" happens. In particular, we aims primary expand the toroidal field to lower field. (1) Ip san at 3T. 1-1. establish a target plasma wish good LHCD at 3T. (3shots) Ip = 300kA, density=~0.3 (ne04), phasing = 90deg, LSN. HXR camera shielding=0.03 check if the wave is accessible check if HXR camera has a good count rate (not too much, not too few) (optional) check if MHD activity happens. 1-2. Set density scan from 0.3 to 1 (ne04) (5shots) Ip = 300kA, 450kA, 600kA. (2) Ip scan at 4.2T 2-1. establish a target plasma wish good LHCD at 4.2T. (3shots) 2-2. Set density scan from 0.3 to 1 (ne04) (7shots) Ip = 400kA, 550kA, 700kA, 800kA. If the time allows, (3) Ip scan at 7T (4) take reference at 5.4T with 500kA and 800kA === std request form ==== Machine and Plasma Parameters Toroidal Field: 3 - 7 T Plasma Current: 0.3 - 0.8 MA Working Gas Species: D2 Density: Ramped, typically 0.5 - 1.5e20 m-3 Boronization Requested (if yes, specify whether overnight or between-shot, how recently needed, and any special conditions.): No Equilibrium configuration (if possible, refer to database equilibria): USN Auxiliary Systems ICRF Power, pulse length, phasing: None LHCD Power, pulse length, phasing: 700 kW, 0.7 s, 90 deg Pellet Injection (species): No Impurity blow-off injection: No Diagnostic Neutral Beam: No Special gas puffing: None Cryopump: Yes Non-axisymmetric Coils (Connections, Current); Standard request for diagnostics HXR array ECE Thomson TCI L_Alpha Array (if available) LH and divertor probes Reciprocating probes

Physics Operators Plans

Entered: Jul 24 2012 09:00:59:450AM

Author: Earl Marmar

Morning: MP665, LHCD at reduced torodal field SL: S. Shiraiwa Afternoon: MP 663, LHCD with alternate limiting surface SL: G. Wallace PO: E. Marmar ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 11210020 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 2 psi NEON Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi D2 DISABLED fill H-bottom with 2 psi ARGON Hybrid DISABLED (PG5) Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): no LH(yes/no): YES Cryopump (yes/no): YES DNB (yes/no): desired, not required Vessel temperature: 35/35/35 overnight ECDC parameters: gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Jul 24 2012 05:23:22:413PM

Author: Greg Wallace

Session leader summary for 1120724 pm MP603: Using alternate limiting surfaces with LHCD Session Leader: G. Wallace Physics Operator: E. Marmar The afternoon run today was quite productive. We switched experiments at ~13:30. Step 1 of the run plan (plasmas limited on upper divertor shelf) went quite smoothly. We skipped to step 3 (scan from USN to upper shelf limited) in the interest of time, then moved on to step 4 (nose limited discharge). We got nice results in step 4 and moved on to step 6 (diverted to nose limited sweep). A "conventional" USN shot with density ramp was taken for comparison with the other shots of the day. Superficially neither the nose limited nor the upper shelf limited discharges seem to be a big win over diverted discharges (such as is the case in inner wall limited). Further analysis of the discharges will clarify this.

Entered: Jul 24 2012 05:30:32:217PM

Author: Syunichi Shiraiwa

SL summary for MP665 SL. S. Shiraiwa PO. E. Marmar It is a difficult run. First, we tried to make a good LHCD driven plasma at 3T/600kA with USN. Early disruption, locked mode?,density control,, all of these needed to be adjusted to get a reasonably good target plasma at shot 12. And even after 12 LH coupling was not really reliable. Although the original goal is to explore a wide range of q95 (field and current combination) using density scan, we obtained LHCD discharges 3T/600kA at different densities and one at 4.2T. A couple of ray-tracing run were performed during the run, which suggests that at 3T accessibility limits first before limited by density. Good LHCD discharges to look is 12, `13, 14, 15 and 17.

Physics Operator Summaries

Entered: Jul 24 2012 09:09:12:133AM

Author: Syunichi Shiraiwa

First discharge disrupted at 0.95s the field did not reach 3T

Entered: Jul 24 2012 09:40:23:417AM

Author: Syunichi Shiraiwa

disrupted at 0.2s

Entered: Jul 24 2012 10:45:08:940AM

Author: Syunichi Shiraiwa

Bt reached 3T a little earlier but still around 0.9s. For next, we will try low field start-up. q95 = 3.2 disrupted at 1.02s Next: reduce Ip to 0.55A low Bt break-down At 1s, density is very flat, and LH looks accessible ....

Entered: Jul 24 2012 11:02:52:070AM

Author: Syunichi Shiraiwa

Fizzle

Entered: Jul 25 2012 11:54:29:473AM

Author: Earl Marmar

The machine and power systems operated well today. The first half-day portion of the run was fairly challenging from the physop point of view. Developing a low field upper null shot using low field startup proved difficult, with early vertical instability problems causing disruptions. Instead, we went to a normal field startup, with field ramping down to 3 tesla. Because of the time required for the rampdown, and the desire for ~0.8 seconds flattop, we extended the shot with current flattop out to 1.8 seconds. This proved to be straightforward, but was set by the 10'th plasma attempt. The second half-day run also presented challenges, requiring unusual shapes (upper plate limited, and nose limited), but these did not prove difficult to achieve. The first shot (as usual on Tuesday) was a data system test, and one shot fizzled due to very high fill pressure (cryo-burp). All other startups were nominal (with some early runaways on a number of the shots, none causing obvious problems). Summary: Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result | 01 0.000 0.002 Dud | 02 0.942 0.655 Plasma | | 03 1.023 0.654 Plasma | 04 0.213 0.566 Plasma | | 05 0.199 0.503 Plasma | 06 0.205 0.513 Plasma | | 07 0.269 0.632 Plasma | 08 0.000 0.036 Fizzle | | 09 1.596 0.649 Plasma | 10 0.982 0.661 Plasma | | 11 2.142 0.656 Plasma | 12 2.136 0.654 Plasma | | 13 2.115 0.661 Plasma | 14 2.131 0.676 Plasma | | 15 2.118 0.675 Plasma | 16 2.118 0.676 Plasma | | 17 2.142 0.674 Plasma | 18 1.975 0.822 Plasma | | 19 1.969 0.819 Plasma | 20 1.978 0.823 Plasma | | 21 1.977 0.817 Plasma | 22 1.965 0.817 Plasma | | 23 1.980 0.814 Plasma | 24 1.908 0.823 Plasma | | 25 1.931 0.820 Plasma | 26 1.938 0.820 Plasma | | 27 1.944 0.822 Plasma | 28 1.976 0.831 Plasma | | 29 2.020 0.807 Plasma Date 1120724: 29 shots. 27 plasmas. 1 fizzles. 1 duds. 0 System Error. (Plasma = Ip gt 60.0 kA Dud = H_alpha lt 0.10 V) Total plasma duration: 43.89 s (exceeding -100 kA)

Session Leader Comments
Jul 24 2012 08:45:37:030AM	1120724001	Syunichi Shiraiwa	1-1: Goal of step 1 to establish good target plasma with clear LHCD. We will start with USN with Cryo to avoid possible H-mode. This might be first attempt to fully non-inductive low q95 discharge..? First shot request: Bt 3T Ip 600kA ne04 ~ 0.3e19. from 0.5s to 1.5s right gap ~ 1.5cm no ninja LHCD from 0.65-1.4s 90deg, 700kW Ar 50ms from 0.3s Checklist: HXR count rate coupling/LH camera PDI probes..
Jul 24 2012 12:10:32:093PM	1120724006	Syunichi Shiraiwa	disrupted in a similar way as shot 5. next : use a high field start up and extend the pulst length
Jul 24 2012 12:09:01:843PM	1120724008	Syunichi Shiraiwa	Fizzle
Jul 24 2012 12:08:31:277PM	1120724011	Syunichi Shiraiwa	We got a full length plasma, but no LH. Next: retry, with LH start at 1.1s. Also move plasma by 3mm upward
Jul 24 2012 12:07:36:077PM	1120724012	Syunichi Shiraiwa	good shot. full length plasma with no-trip LH. there us a clear drop in vloop. next: add density ramp. from 1.1 to 1.5s LH starts at 1s
Jul 24 2012 12:22:47:877PM	1120724013	Syunichi Shiraiwa	Density increased as requested but LH did not couple. Camera and probe density seems okey...
Jul 24 2012 12:33:16:350PM	1120724014	Syunichi Shiraiwa	ne04 at the beginning of ne ramp-up is 5e19. an indication of non-thermal and loop voltage drop LH stop coupling when density ramp-up starts. Next: increase the inital density (when ne ramp-up starts.)
Jul 24 2012 01:41:43:883PM	1120724015	Syunichi Shiraiwa	ne04 at the beginning of the shot is about 6e19 LH was turn on during flat density phase. Genray shows it is not accessible.
Jul 24 2012 01:16:37:660PM	1120724016	Syunichi Shiraiwa	no LH pulse for this shot. Next try again. genray shows this one is not accessible. increasing the field to 4.2T
Jul 24 2012 02:02:07:867PM	1120724017	Syunichi Shiraiwa	4.2T case at 6e19. The last shot of the first part. This shot is close to the accessibility boundary. But Vloop seems to have a clear drop at ne ~ 1e20
Jul 24 2012 02:13:04:553PM	1120724018	Greg Wallace	First shot for MP663. One fault near end of LH pulse. Looks on the camera like launcher was heating up towards end of pulse---probably some breakdown on the vaccum side based on reflection coef behavior. Next shot: Try to decrease density at beginning of ramp to nebar < 1e20. Also increase ZCUR and ZXU to get plasma limited on upper divertor plate.
Jul 24 2012 02:25:40:003PM	1120724019	Greg Wallace	Two early faults, then good LH for the duration of the pulse. Looks like poor coupling caused the faulting. The upper x-point is just barely touching the upper divertor plate. Non-thermal emission clearly goes away as density increases. Density ramp starts too high, but not much we can do about that. Next shot will move ZXU up a bit more. Also decrease outer gap by ~5 mm before 1.0 s to improve coupling in early part of discharge.
Jul 24 2012 02:40:19:237PM	1120724020	Greg Wallace	One fault at turn-on. Strong non-thermal emission early at low ne, then goes away as density increases. Good shot, satisfies step 1 of run plan. Next shot will go on to step 2: dynamic ZXU scan during LH pulse. Set density constant at nl_04 ~ 0.7e20.
Jul 24 2012 02:58:11:230PM	1120724021	Greg Wallace	First attempt at dynamic ZXU scan. Clean LH pulse. Didn't quite make it all the way to limited. Next shot will try harder to go limited towards end of the LH pulse. Also keep outer gap constant around 1.2 cm.
Jul 24 2012 03:19:53:930PM	1120724022	Greg Wallace	Good shot. Sweep of upper x-point onto upper divertor shelf. Constant density at nebar = 1.25e20. Next shot will increase density to nl_04=.9e20. Also increase power from 120 to 140 kW/klystron.
Jul 24 2012 03:31:53:023PM	1120724023	Greg Wallace	Several faults during LH pulse, looks like it could be breakdown on the plasma side. Will call step 2 of run plan complete. Will move on to step 4 in the interest of time. Next shot will be attempt at nose limited plasma.
Jul 24 2012 04:08:00:537PM	1120724024	Greg Wallace	Some early and some late faulting. Early faulting seems to be due to high reflections, later is breakdown on plasma side. Ian says he can see enhanced HXR emission from the nose. Will try tweaking outer gap for next shot to improve coupling.
Jul 24 2012 04:22:09:780PM	1120724025	Greg Wallace	2nd attempt at nose limited discharge with LH. Two faults at end of LH pulse. Density starts a bit too high. Next shot will try to dynamically sweep lower x-point onto the nose during the LH pulse (step 6).
Jul 24 2012 04:32:55:603PM	1120724026	Greg Wallace	One fault during middle of LH pulse. Two funny ELM-free H-modes? Next shot will decrease density program from 7e19 to 6e19 on nl_04. Hope to avoid H-modes.
Jul 24 2012 04:51:23:717PM	1120724027	Greg Wallace	Many faults during first part of LH pulse. Next shot will go for standard USN plasma for comparison's sake. Load from 1120523017 but add same density ramp as from shot 20 of today.
Jul 24 2012 05:00:55:427PM	1120724028	Greg Wallace	A few faults at the end of the discharge. Good density ramp in upper null. Next shot will try for inner wall limited discharge.
Jul 24 2012 05:13:20:313PM	1120724029	Greg Wallace	All faults. Very high reflections across all rows. Last shot of the day.

Physics Operator Comments
Jul 24 2012 09:21:23:817AM	1120724002	Earl Marmar	load from 1120710020 prefill puff to 40 msec (cryo startup) reduce TF to 3 tesla (segment 3) enable argon (PG5), 100 V (0.3 to 0.35 s) increase RCUR by 3 mm (to decrease right gap) Ip to 600 kA nl_04 target to 0.3e20 plasma, TF rampdown too slow disrupts at 0.94 s (preceeded by extreme increase in Prad)
Jul 24 2012 09:37:09:540AM	1120724003	Earl Marmar	speed up TF rampdown increase RCUR by 2 mm plasma disrupt just after 1 sec
Jul 24 2012 09:59:08:183AM	1120724004	Earl Marmar	go to low field startup power settings from 1120712021 load from 1120712021 import segment 3 from model into segment 3 prefill puff to 40 ms (cryopump) reduce argon puff to 25 ms plasma early disrupt vertically unstable starting ~0.15 s
Jul 24 2012 10:12:53:970AM	1120724005	Earl Marmar	change zcur programming early in segment 3 (~match to segment 1 at segment switch) plasma early disrupt again
Jul 24 2012 10:35:22:580AM	1120724006	Earl Marmar	delay segment 3 rcur ramp by 150 ms (start at 300 ms) plasma early disruption vertically unstable starting at ~150 ms
Jul 24 2012 10:55:19:643AM	1120724007	Earl Marmar	load from 1120724003 extend flattop to 1.8 s (many changes) reduce Ip to 550 reduce argon puff to 25 ms (still starting at 0.3) power supply settings also changed plasma, early disruption this one is not vertically unstable Prad is rising rapidly before the disruption, but it doesn't look like an injection
Jul 24 2012 11:04:15:053AM	1120724008	Earl Marmar	tweak early segment 3 Ip programming fizzle fill pressure is high (0.1 mTorr) probably a cryo problem
Jul 24 2012 11:24:45:323AM	1120724009	Earl Marmar	nl_04 target to 3.5e19 plasma disrupt at 1.6 s density control is not great hards come up strongly starting ~0.35 s
Jul 24 2012 11:39:11:220AM	1120724010	Earl Marmar	increase RCUR 3 mm (to shrink outer gap by 6 mm) extend TF flattop tweak nl_04 derivative gain plasma disrupt at 0.98 s
Jul 24 2012 11:47:26:163AM	1120724011	Earl Marmar	add some preprog voltage to PG3 in segment 3 increase ZCUR 3 mm increase RCUR 1 mm plasma, nearly full length density control somewhat improved no Lower Hybrid
Jul 24 2012 12:23:15:927PM	1120724012	Earl Marmar	increase segment 3 preprog on PG3 to 30 (from 20) increase RCUR another 2 mm increase ZXUR another 3 mm plasma, nearly full length got LH this time
Jul 24 2012 12:22:48:353PM	1120724013	Earl Marmar	reduce prefill puff by 5 msec (to 35 ms) change nl_04 target to ramp up after 1.1 seconds plasma, nearly full length
Jul 24 2012 12:32:01:877PM	1120724014	Earl Marmar	reduce RCUR by 2 mm between 1.1 and 1.5 s plasma, nearly full length
Jul 24 2012 12:41:11:270PM	1120724015	Earl Marmar	nl_04 target (t<1.1 s) to 4.5e19 plasma, nearly full length
Jul 24 2012 01:10:06:263PM	1120724016	Earl Marmar	nl_04 (t<1 s) to 5.5e19 plasma, nearly full length no LH
Jul 24 2012 01:27:35:267PM	1120724017	Earl Marmar	load from 1120724015 add second argon puff (1.1 to 1.13 s) TF flattop current to -109.2 kA
Jul 24 2012 02:06:01:447PM	1120724018	Earl Marmar	switching MPs load from 1091016019 import segment 1 from model into segment 1 zero segments 3 and 4 recalculate magnetics in segment 2 add dpcs_xjump and dpcs_piezo_chopper (with advice from S.M.W.) Ip to 800 kA tweak TF current tweak ZXU and ZCUR (both moved up) change nl_04 target program plasma, full length
Jul 24 2012 02:29:37:240PM	1120724019	Earl Marmar	increase ZXU by 1 cm increase ZCUR by 1 cm tweak nl_04 target programming plasma, full length
Jul 24 2012 03:03:09:830PM	1120724020	Earl Marmar	increase ZXU by 3 mm increase RCUR 3 mm (before 1.0 s) tweak nl_04 target programming plasma, full length some early hards
Jul 24 2012 02:55:50:027PM	1120724021	Earl Marmar	nl_04 to 0.7e20, constant dynamically scan ZCUR and ZXU (go from USN to upper-plate limited) plasma, full length some early hards
Jul 24 2012 03:01:32:920PM	1120724022	Earl Marmar	increase prefill puff by 4 ms (to 39 ms) increase ZXU and ZCUR ramps slightly, and keep RCUR constant (no decrease after 1 second)
Jul 24 2012 03:14:54:463PM	1120724023	Earl Marmar	nl_04 target to 0.9e20
Jul 24 2012 03:56:22:287PM	1120724024	Earl Marmar	going to nose limited load from 1100827015 zero segments 2 and 3 recalculate magnetics predictors in segment 4 cut and paste shape and position parameters from 1040326021 (segment 4) into each wire in segment 4 copy density target programming from shot 20 today plasma, full length
Jul 24 2012 04:20:44:497PM	1120724025	Earl Marmar	change RCUR programming between .7 and 1.4 s (want to have right gap increasing instead of decreasing over this period) plasma, full length
Jul 24 2012 04:30:10:243PM	1120724026	Earl Marmar	nl_04 to 7e19 scan RXL from LSN to nose limited RCUR to 0.659 (no scan during LH) plasma, 2 brief h-modes during LH
Jul 24 2012 04:57:38:417PM	1120724027	Earl Marmar	nl_04 to 6e19 plasma, full length
Jul 24 2012 05:04:58:703PM	1120724028	Earl Marmar	load from 11200523013, USN no argon puff plasma, full length
Jul 24 2012 05:14:09:910PM	1120724029	Earl Marmar	load from 1120612015, inner-wall limited Ip to 800 kA plasma, full length early hards no LH last shot of the day

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	07:11:44:313AM	Test	Ok
2	09:00:49:930AM	Plasma	Ok
3	09:18:50:893AM	Plasma	Ok
4	09:35:45:767AM	Plasma	Ok
5	09:58:10:080AM	Plasma	Ok
6	10:12:23:893AM	Plasma	Ok
7	10:46:24:727AM	Plasma	Ok
8	11:00:30:593AM	Plasma	Ok
9	11:12:47:650AM	Plasma	Ok
10	11:25:31:710AM	Plasma	Ok
11	11:38:55:347AM	Plasma	Ok
12	11:52:18:580AM	Plasma	Ok
13	12:06:37:943PM	Plasma	Ok
14	12:22:42:280PM	Plasma	Ok
15	12:35:59:967PM	Plasma	Ok
16	12:49:38:780PM	Plasma	Ok
17	01:34:02:567PM	Plasma	Ok
18	01:59:58:547PM	Plasma	Ok
19	02:14:51:827PM	Plasma	Ok
20	02:29:14:470PM	Plasma	Ok
21	02:50:31:090PM	Plasma	Ok
22	03:08:52:937PM	Plasma	Ok
23	03:27:05:237PM	Plasma	Ok
24	03:48:15:757PM	Plasma	Ok
25	04:05:32:697PM	Plasma	Ok
26	04:22:11:740PM	Plasma	Ok
27	04:39:23:410PM	Plasma	Ok
28	04:54:18:960PM	Plasma	Ok
29	05:08:50:410PM	Plasma	Ok

System Availability

Jul 24 2012 07:11:22:390AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 2 2008 11:03:58:433AM (sears) Joe Snipes Active MHD Antenna golfit BES yes BES system is online Nov 22 2011 02:21:12:050PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes Midplane diodes functioning properly. Midplane bolometers working and calibrated. DIV bolometers installed but not yet toaster calibrated Apr 20 2012 09:57:29:520AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Jun 15 2012 05:02:46:313PM (dekow) Jim Irby Boronization dekow,irby CECE yes The system is currently operational for Te tilde measurement. Talk to Choongki about the current configuration Jul 3 2012 04:38:00:317PM (nthoward) Anne White Correlation ECE nthoward,sck83,whitea CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01:59:693PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes   Jun 15 2012 05:02:31:550PM (dekow) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard CXRS yes core-CXRS system is online Nov 22 2011 02:21:22:280PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan CXRS edge yes Michael CHurchill has primary responsibility at the moment Apr 19 2011 11:44:46:247AM (blip) Bruce Lipshultz Measurement of CXR light in the pedestal region at both the high- and low-field sides blip,rmchurch D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 1 2009 09:45:41:090AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa no system is is installed and aligned, but not functional (appears to be a broken cable) Dec 5 2011 02:41:42:867PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar Disruption Mitigation yes two gas jet valves active as of Feb 2012 May 15 2012 10:09:23:597AM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 6 2007 10:50:41:677AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 6 2007 10:51:39:897AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 1 2012 01:24:23:953PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte DNB yes "The beam could break at any moment." May 15 2012 10:09:52:470AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung ECDC yes   Apr 26 2012 03:23:19:057PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes FRC-ECE is online May 14 2012 11:53:01:693AM (bespam) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea FTCI yes System Operational May 14 2012 11:50:45:590AM (irby) Jim Irby Fast two-color interferometer irby G-Side Ratiomatic yes Installed April 25,2012. New controller installed 5/29/2012 Jun 7 2012 10:40:00:957AM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no HV cables disconnected and power supplies off. Electrical plugs have been disconnected, capped and red tagged. Mar 5 2012 10:21:53:460AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational Apr 27 2012 07:41:46:907AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPC2 yes Operational Apr 27 2012 07:42:03:317AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 1 2009 09:45:50:933AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes system is functional and taking data Dec 5 2011 02:42:29:857PM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Apr 26 2012 03:23:49:607PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36:33:420PM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 6 2011 08:21:02:453AM (ypodpaly) John Rice High Resolution X-Ray cgao,ldelgado,rice,ypodpaly HXR yes 32 Channels operational,, no safety risk for in-vessel access Apr 14 2011 12:05:24:810PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna yes   May 31 2012 09:20:06:827AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes   May 31 2012 09:19:57:640AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes   May 31 2012 09:19:47:443AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Impurity Spectroscopy yes Being upgraded with better optics and new spectrographs. Dan Miller has primary responsibility. Apr 19 2011 11:46:02:193AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller Laser Blow-Off yes Pumped Down, Laser has not yet been tested but otherwise operational May 14 2012 04:31:17:037PM (nthoward) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid yes LH is now available for plasma operation up to ~900 kW net power. Jul 3 2012 02:50:00:693PM (wallaceg) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer no off Apr 15 2011 08:24:27:930AM (dominguez) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek LoWEUS yes LoWEUS viewing the 10-30 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:34:077AM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke LPI no Beam line removed May 30 2008 02:09:12:833PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha no Midplane Lyman-a not functioning. New B-PORT Lyman (BPLY) still being debugged. Jul 12 2012 08:52:28:233AM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke Magnetics yes   Dec 1 2011 11:51:51:970AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe McPherson no McPherson under vacuum but is not run on a day-to-day basis. Can be requested if desired. LoWEUS has taken over as the primary Mo monitor. Jul 12 2012 08:53:14:937AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry Michelson yes Vacuum 3-4e-8 T. Starting with Michelson at reduced speed. Apr 27 2012 07:42:41:960AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes   Dec 2 2011 12:27:47:163PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland MLP yes Operational. Connected to A-port probe system May 10 2012 08:40:19:910AM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE yes 2/29/2012 MSE operational. No HV or vacuum safety issues Feb 29 2012 12:26:13:863PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Voltage is on for He3 detectors on J port. Remaining voltages will be turned on for the first run. Apr 23 2012 09:31:22:063AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05:24:380PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA yes C-bottom and new F-bottom system ready. Dec 2 2011 12:28:44:843PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland PCI yes Operational. Jul 10 2012 07:08:06:883PM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges yes HV power supplies turned ON in INIT, off in RECOOL May 10 2012 08:41:03:000AM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 1 2009 09:46:29:543AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter yes 3 chords operational but with high noise level Jan 6 2012 04:22:20:903PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Apr 26 2012 03:24:21:607PM (dekow) Gary Dekow Alternator to Power Room Power Supply Connection cochran,dekow,dterry,irby Power - PEI yes   Apr 26 2012 03:24:41:250PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Apr 26 2012 03:24:57:153PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Apr 26 2012 03:25:14:497PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational. Some dead probes. May 10 2012 08:41:58:120AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational. 4 out of 6 probes working. May 10 2012 08:41:40:557AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Operational. May 10 2012 08:42:13:733AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard Probe Array - UDIV yes Operational. Some dead probes. May 10 2012 08:42:32:663AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes On 1120608, the high frequency channels: 112, 140 and the variable, have been disconnected for some troubleshooting. All other channels are connected Jun 14 2012 11:28:59:603AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Operational. A variety of probe heads are ready for use. May 10 2012 08:43:10:937AM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. May 10 2012 08:43:24:887AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP no Not functioning. Probe tips are melted. Repair not performed during break. May 10 2012 08:44:43:137AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Shoelace Antenna yes Operational May 10 2012 08:45:08:320AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard SOL reflectometer yes c-port (top, middle, bottom) and h-port available. Only 1 of 4 locations can be used for each discharge May 1 2012 04:54:58:820PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin Sparker yes Sparker Power Supply powered up. Connected at K port using red cable 4/23/12 9:25AM Apr 23 2012 12:06:10:983PM (parkin) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station yes SSS is under vacuum and fully available. Jul 3 2012 02:46:59:753PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes TCI lasers in operation May 14 2012 11:51:18:700AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with both lasers, density calibration ongoing. Jul 19 2012 10:20:09:220AM (jrwalk) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes Operating with both lasers, density calibration ongoing. Jul 19 2012 10:20:28:323AM (jrwalk) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58:35:493AM (agraf) Alex Graf Visible Spectrometer agraf XEUS yes XEUS viewing the 1-6 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:43:107AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->5 available. Specific channels on various arrays display issues. Apr 20 2012 05:36:28:523PM (faustian) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke