Miniproposals

Miniproposal: 463 Date Filed: 3/7/2007 Title: Reaching Zero loop Voltage with LHCD First Author: Ron Parker Session Leader: Steve Scott (shots 10-12)

Miniproposal: 611 Date Filed: 7/8/2010 Title: Momentum Confinement and Lower Hybrid Source Determination First Author: Yuri Podpaly Session Leader: Yuri Podpaly (shots 1-6)

Miniproposal: 617 Date Filed: 8/13/2010 Title: Locked mode rotation studies and development of a novel spectral calibration technique for HiReX-Sr First Author: Luis Felipe Delgado-Aparicio Session Leader: Luis Felipe Delgado-Aparicio (shots 8-9) Session Leader: Luis Felipe Delgado-Aparicio (shots 13-17)

Miniproposal: 619 Date Filed: 9/30/2010 Title: Effects of ICRF and LH power on SOL density pofiles First Author: Cornwall Lau Session Leader: Cornwall Lau (shots 18-23) Session Leader: Cornwall Lau (shots 24-31)

Engineering Operator Run Comment

MP 611, 617, ? MSE ohmic discharges, 619.

Session Leader Plans

Entered: Oct 28 2010 08:24:16:323AM

Author: Yuri Podpaly

Run plan: 1101028 MP611: Momentum Confinement and Lower Hybrid Source Determination Bt: 5.4 T Ip: 0.550, .8 MA nl04~ 0.4-0.6E20 Working Gas Species: D2 Boronization Requested: No Required Diagnostics: Thomson, HiReX Sr, HiReX Jr, HXR, standard magnetic suite. This run is a continuation of 1101021, in order to help characterize the LHCD induced rotation. Lower Hybrid will be required at n||=1.6 and PLH ~800kW. The estimated shot list assuming perfect behavior is: LSN nl04 ~0.4 Ip= 550 kA (based on 1101021007) USN nl04 ~0.4 Ip= 550 kA (based on 1101019014) USN nl04 ~0.6 Ip=550 kA USN nl04~0.4 Ip=700 kA repeat if there are locked modes at lower current. LSN nl04 ~0.4 Ip=550 kA with 1MW ICRF (0.6s-1.6s). Time permitting: LSN nl04 ~0.6 Ip=800 kA kappa=1.7

Entered: Oct 28 2010 01:22:00:720PM

Author: Cornwall Lau

Working gas: D2 No boronization and standard ECDC. ICRF and LH, and cryopump needed Required diagnostics are Thomson scattering, LH langmuir probes. Ion sensitive/emissive probes, LH reflectometer, hard x-rays are desired. Load from 1101020004. Launcher at .1mm. n||=1.9 Part 1: E power ramp from .2 to 1MW over .55 to .95s. LH at 500kW from 1.05 to 1.45s. J power ramp from .4 to 2MW over 1.05 to 1.45s Shot 1: nl04= .8 x10^20, I=800kA Shot 2: nl04= .8x10^20, I=1MA Shot 3: nl04= 1.2x10^20, I=1MA Change outer gap/launcher location if necessary for better coupling. Raise LH power if necessary. Part 2: Choose best density and current. Shot 4: D,E, J power ramps from .1 to .2MW (.2 to .4MW for J) over .6-.8 s, .9 to 1.1 s, 1.2 to 1.4 s, respectively. Shot 5: D power ramp from .2 to 1MW over .55 to .95s. LH at 500kW from 1.05 to 1.45s. E power ramp from .2 to 1MW over 1.05 to 1.45s Shot 6: J power ramp from .4 to 2MW over .55 to .95s. E at 500kW from 1.05 to 1.45s. LH power ramp from .2 MW to max power over 1.05 to 1.45s Shot 7: D and E power ramp from .2 to 1MW each over .6 to .8s. J at 500kW from 1.05 to 1.45s. LH power ramp from .2 MW to max power over 1.05 to 1.45s Shot 8: D and E power ramp from .2 to .5MW each, J power ramp from .4 to 1MW over .55 to .95s. LH power ramp from .2 MW to max power over 1.05 to 1.45s Repeat interesting shot(s) at another density. If power ramps need full shot to keep a nice, constant nl04, do that instead. Repeat at LSN if have time (H-modes)

Entered: Oct 28 2010 03:21:34:600PM

Author: Arturo Dominguez

If Cornwall gets all his shots, and the other SL's are good to go, I'll jump in. I'd like a repeat of shot 1101014018 as is. My plan is to have the same plasma while the variable frequency channel is sweeping a range of 110.5-113.5 GHz

Physics Operators Plans

Entered: Oct 27 2010 03:49:20:520PM

Author: Steve Wukitch

MP 611: Momentum Confinement and Lower Hybrid Source Determination MP 617: Locked mode rotation studies and development of a novel spectral calibration technique for HiReX-Sr MP ???: MSE Ohmic Discharges MP 619: Effects of ICRF and LH power on SOL density pofiles Session Leader: Yuri Podpaly, Luis Delgado-Aparicio, Steve Scott, Cornwall Lau Physics Operators: Steve Wukitch ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1101021007 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 1 psi Ar Hybrid ENABLED (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 Neon Hybrid DISABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, 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 ICRF(yes/no): yes LH(yes/no): yes Cryopump (yes/no): yes DNB (yes/no): yes Vessel temperature: 50/50/50 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s PO Plan First plasma setup has been saved in /home/wukitch/pcs_scratch/1101028000 MP611 is moment confinement and investigating LH driven rotation. This discharge sequence is below: LSN nl04 ~0.4 Ip= 550 kA USN nl04 ~0.4 Ip= 550 kA (based on 1101019014) USN nl04 ~0.6 Ip=550 kA USN nl04~0.4 Ip=700 kA repeat if there are locked modes at lower current. LSN nl04 ~0.4 Ip=550 kA with 1MW ICRF (0.6s-1.6s). LSN nl04 ~0.6 Ip=800 kA kappa=1.7 MP617 is looking for locked modes and will be based upon 1101021003 (backup is 1100909003) a) Locked-mode b) a) + LH with n||=1.6 c) Repeat d) a) + LH with n||=2.5 e) Repeat. The MSE ohmic discharges will be based upon 1101019027. A low density (nl04 of 0.3) with the flattop extended to 1.7s at 500kA and 5.4T. There is no RF or LH. We would also require the same DNB timing and parameters. The goal is to get a set of ohmic baseline so we can determine the during shot reproducibility of MSE.a) Locked-mode The remainder of the discharges will be based upon 1101015004 (USN). The LH launcher should be at .1mm with n||=1.9. With each antenna injecting separately, scan density and plasma current. 1: nl04= 0.8x10^20, I=800kA 2: nl04= 0.8x10^20, I=1MA 3: nl04= 1.2x10^20, I=1MA Change outer gap/launcher location if necessary for better coupling. Raise LH power if necessary. Choose best density and current. 4: D,E, J power ramps from .1 to .2MW (.2 to .4MW for J) over .6-.8 s, .9 to 1.1 s, 1.2 to 1.4 s, respectively. 5: D power ramp from .2 to 1MW over .55 to .95s. LH at 500kW from 1.05 to 1.45s. E power ramp from .2 to 1MW over 1.05 to 1.45s 6: J power ramp from .4 to 2MW over .55 to .95s. E at 500kW from 1.05 to 1.45s. LH power ramp from .2 MW to max power over 1.05 to 1.45s 7: D and E power ramp from .2 to 1MW each over .6 to .8s. J at 500kW from 1.05 to 1.45s. LH power ramp from .2 MW to max power over 1.05 to 1.45s 8: D and E power ramp from .2 to .5MW each, J power ramp from .4 to 1MW over .55 to .95s. LH power ramp from .2 MW to max power over 1.05 to 1.45s Repeat interesting shot(s) at another density. If power ramps need full shot to keep a nice, constant nl04, do that instead. Repeat at LSN if have time (H-modes)

Session Leader Summaries

Entered: Oct 28 2010 10:38:56:553AM

Author: Yuri Podpaly

We successfully ran six shots for MP 611. Four were in upper single null and one was in lower single null. One shot had an early locked mode, which lower hybrid nevertheless coupled into. Upper single nulls generally rotated in the counter current direction, but we were able to run at low enough collisionality (maybe) that the time scale of the rotation changes was very slow. And there were bursts of counter rotation after the LH turn off. Shot 6 was particularly interesting as a LSN shot at 580kA. The rotation exhibited different behaviors, reached Te = 5 keV on axis, zero loop voltage, and the Ti still dropped during the LHCD pulse.

Entered: Oct 28 2010 05:59:43:767PM

Author:

excellent day. Started with shot 18 and ended up with 14 shots. Cryopump worked well all day. nl04 of .4, .8, 1.1 x10^20 achieved. Currents of 800kA and 1MA achieved for nl04 of .8. Current of 1 MA achieved at nl04 of 1.1 and current of .8MA achieved at nl04 of .4. Good ICRF data at D,E, J (all shots except 23) for all densities and currents. Lower hybrid had issues at high densities; most likely, there was too much power in the SOL, which injected tungsten from the lower divertor shelf. Good LH power (700kW at shot 1101028030) achieved at nl04 =.4. Some data was achieved at higher densities, but at lower LH powers (< 500kW). Results will be analyzed soon. . Preliminary results seems to strongly depend on nl04, and possibly gas input? When LH is turned on, density always increases. This is a strong evidence of ionization and/or pondermotive force. There is no clear power dependence yet. ICRF seems to be increasing density today too for all antennas. More analysis needs to be done.

Entered: Nov 2 2010 09:56:09:350AM

Author: Luis Felipe Delgado-Aparicio

This second part of MP617 was aimed at testing the HiReX-Sr spectrometer in an elevated temperature environment (e.g 30oC in comparison to the ~24oC room temperature) using the new thermal pads, RTDs and temperature controllers. The locked-mode shots used were reproducible; the difference in the time history of toroidal velocity profiles of distinct locked-modes seem to be related to the crystal temperature difference on shot to shot basis. Lower hybrid waves (with n||=1.6) were also used at the end of some shots (e.g. 101028013) being able to provide momentum input to the locked-mode (e.g. 10-20 km/s) thus unlocking the mode and recuperating the sawtooth oscillations.

Entered: Nov 2 2010 09:56:19:200AM

Author: Luis Felipe Delgado-Aparicio

This second part of MP617 was aimed at testing the HiReX-Sr spectrometer in an elevated temperature environment (e.g 30oC in comparison to the ~24oC room temperature) using the new thermal pads, RTDs and temperature controllers. The locked-mode shots used were reproducible; the difference in the time history of toroidal velocity profiles of distinct locked-modes seem to be related to the crystal temperature difference on shot to shot basis. Lower hybrid waves (with n||=1.6) were also used at the end of some shots (e.g. 101028013) being able to provide momentum input to the locked-mode (e.g. 10-20 km/s) thus unlocking the mode and recuperating the sawtooth oscillations.

Entered: Nov 30 2010 05:16:38:220PM

Author: Cornwall Lau

excellent day. Started with shot 18 and ended up with 14 shots. Cryopump worked well all day. 5 or 6 disruptions, but I still got data before the disruption ended. nl04 of .4, .8, 1.1 x10^20 achieved. Currents of 800kA and 1MA achieved for nl04 of .8. Current of 1 MA achieved at nl04 of 1.1 and current of .8MA achieved at nl04 of .4. Good ICRF data at D,E, J (all shots except 23) for all densities and currents. Lower hybrid had issues at high densities; most likely, there was too much power in the SOL, which injected tungsten from the lower divertor shelf. Good LH power (700kW at shot 1101028030) achieved at nl04 =.4. Some data was achieved at higher densities, but at lower LH powers (< 500kW). When LH is turned on, density always increases. This is a strong evidence of ionization and/or pondermotive force. There is no clear power dependence yet. ICRF is definitely decreasing today if you use the ohmic calibration. STRONG decrease especially as power is ramped. Also, maybe becasue of the power dependence, but it overwhelms the power when both ICRF and LH is turned on. Note this decrease looked a bit less when density dropped and current went to 800kA. Hard to make comparisions though Manual intervention will be needed starting with shot 26. Once I moved to nl04=.4, it got a bit noisier too. Probably need more averaging?

Physics Operator Summaries

Entered: Oct 28 2010 05:10:09:290PM

Author: Steve Wukitch

A busy operations day with multiple MPs being run. MP611 was started by loading the startup from 1101026026 seg 1 and adjusting prepuff for cryopump on pulse_gas4 to 40 ms and reduced plasma current to 550 A. I maintained the nl_04 programming that goes negative to ensure no late gas puffs thought to help low density discharges. These discharges went well and 006 was a trophy discharge. We tried to repeat for 007 but init was started before load was completed - operator error. A critical init failure was not generated and there was about 40 minute delay investigating this incident. MP617 was started with loading from 1101021003 segment 3 (0.8 MA, LSN, locked mode). The first two discharges went without a hitch but we shuffled the discharge order to get LH back on-line. There was a cooling water issue solved by adjusting the mixing valve. The MSE ohmic discharges were run based upon 1101019027 and the three discharges were reproducible. We returned to MP611 and added LH. We struggled with disruptions during these 5 discharges. During the last MP, we struggled with Tungsten injections with high power LH and high target density. We moved RXL more negative by 1 cm to no avail. Lowering the plasma density was more productive. Breakdown was becoming later around discharge 022 and Bz looked too positive. Adjusting IC_EF4 more negative (10 A) moved the breakdown earlier. On 028, we had some hard x-rays and 029 they became worse. I removed the IC_EF4 which eliminated the hard x-rays but the breakdown was delayed a bit. I would chose to adjust IC_EF4 to -1290 and increase the gas puff to 50 ms. score card 31 attempts 31 plasmas 0 fizzles 8 disruptions (before rampdown and 1 due to EF1)

Session Leader Comments
Oct 28 2010 09:07:17:060AM	1101028001	Yuri Podpaly	Shorter than expected LH pulse, but it was at 800 kW. 20 km/s change in the counter current direction. Next: Shot 2 in USN. LH extending pulse to 500 ms
Oct 28 2010 09:39:42:673AM	1101028002	Yuri Podpaly	LH rotates counter current, but the rotation change has a very slow timescale. Temperature was much lower than on 1101019014, and density was a bit higher. Seems to suggest collisionality argument, but we need to touch base with 1101019. Next: Repeat and hope for better density control.
Oct 28 2010 09:36:08:897AM	1101028003	Yuri Podpaly	LH barely causes any rotation until the turn off. This suggests decoupling of the ions and electrons Next: USN 700 kA.
Oct 28 2010 09:53:49:900AM	1101028004	Yuri Podpaly	Possible locked mode, but LH makes it in. Next: part 3 with better density control, to try to get the co-rotation. Up the LH power 1000 MW.
Oct 28 2010 10:07:18:713AM	1101028005	Yuri Podpaly	Density did not really come down. Rotation shows slow decay. Next: Switch back to shot 1 configuration. Attempt to get the LSN rotating in the co-direction.
Oct 28 2010 10:15:24:623AM	1101028006	Yuri Podpaly	Counter rotation. Ti drops, 5 keV on axis sawteeth stabilized zero loop voltage. Wow. Next: That is all for this section. Switching to Luis.
Oct 28 2010 11:27:29:707AM	1101028008	Luis Felipe Delgado-Aparicio	PLAN: Begin of MP617. Locked mode shot without DNB. RESULT: Locked mode @ ~ 716 ms. Agreement between W, Z and Jr. The fourth module did not work. The excursions in Te and magnetics occur at the same time.
Oct 28 2010 11:40:02:477AM	1101028009	Luis Felipe Delgado-Aparicio	PLAN: Repeat RESULT: Good. Locked mode @ ~ 710 ms. VERY nice velocity data.
Oct 28 2010 12:59:42:933PM	1101028013	Luis Felipe Delgado-Aparicio	PLAN: Repeat of shot successful locked-mode shots 009 and/or 010. Add argon from 300 to 600 ms. Add LH 600 kW from 1.0 to 1.5 sec with n||=1.6 to non-rotating phase. RESULT: Good. RF faults from 1.35 onwards. We unlocked it. We also heated the ions from 1.2 to 1.4 keV. The initial Te0 increase from 2.3 to 3.1 resulted in an increase of the W signal from 4524 to 8243. Make sense?
Oct 28 2010 12:45:27:737PM	1101028014	Luis Felipe Delgado-Aparicio	PLAN: Repeat of 013. RESULT: Disruption @ ~0.16
Oct 28 2010 01:09:46:570PM	1101028015	Luis Felipe Delgado-Aparicio	PLAN: Repeat of 013. RESULT: Something happen at ~ 1.0 sec. Did not go through and disrupted before RF begun. Locked well at ~710 ms. The velocity tends to a final value of ~+10km/sec possibly because the crystal temperature has decrease. LOOK into it!
Oct 28 2010 01:34:35:027PM	1101028017	Luis Felipe Delgado-Aparicio	PLAN: Repeat of 013. RESULT: RF faulty, but good; got it out.
Oct 28 2010 02:21:29:377PM	1101028018	Cornwall Lau	good shot, ICRF is great, but glowing on LH is probably causing the trips. next shot: increase outer gap to 1.5cm.
Oct 28 2010 02:22:02:923PM	1101028019	Cornwall Lau	great shot. good ICRF/LH pulses and constant density. next shot: move to 1MA
Oct 28 2010 02:22:36:343PM	1101028020	Cornwall Lau	disruption. repeat with slight changes in clearin (see physop)
Oct 28 2010 02:46:29:917PM	1101028021	Cornwall Lau	good shot. disrupted at 1.23? no impurity people around. still got some LH/ICRF data before then, and it looks good. moving on to nl04 of 1.2. changes due to ICRF much more evident here?
Oct 28 2010 02:56:36:327PM	1101028022	Cornwall Lau	disrupted at 1.1. LH splashing stuff on top? first half with E looks good. repeat except with D instead of E at the beginning. Matt says it's tungsten; moving rxl in as suggested by Greg (worked on 1101019013)
Oct 28 2010 03:01:48:480PM	1101028023	Cornwall Lau	disrupted at .6s (see phys-op plan) repeat.
Oct 28 2010 03:26:41:400PM	1101028024	Cornwall Lau	disruption due to LH again. we might not have changed rxl enough; flux surface is still on lower outer divertor shelf. Let's try moving it another 5mm. next shot: J at .55 to .95, E at 1.05 to 1.45
Dec 23 2010 12:18:20:013PM	1101028025	Cornwall Lau	disruption again. I give up on the high density shots with LH, although I did manage to get J/D/E data in 23,24,25. Moving back to nl04=.8, I=1MA Note to myself: I had some trouble with my analysis routine on the last timeslice before the disruption. Had to do it manually, and I can't figure out why
Dec 15 2010 07:14:18:647PM	1101028026	Cornwall Lau	good shot. moving on to shot 5 of session leader plan. lowering LH power to 300-400kW in hopes that it won't disrupt. The pictures below compare D, E, and J antenna with times selected so that the outer gap is as close as possible to ohmic
Oct 28 2010 04:08:00:170PM	1101028027	Cornwall Lau	good shot. next shot: J power ramp at .55-.95. LH power ramp (200-400kW) at 1.05 to 1.45
Oct 28 2010 04:26:16:510PM	1101028028	Cornwall Lau	good shot. moving to nl04 of .4 and I=800kA, so that I can get a LH power ramp soon. Thus, shots 7 and 8 are scrapped from the session leader plan. First shot will be only ICRF: like shot 4 in session leader plan.
Oct 28 2010 04:31:02:767PM	1101028029	Cornwall Lau	looks good. next shot: LH power ramp from 200 to 800kW next shot at 1.05 to 1.45s. Might as well do E from .2 to 1MW from .55 to .95s.
Dec 3 2010 09:24:56:480PM	1101028030	Cornwall Lau	good shot. next shot: LH is the same. J at .55 to .95s, E at 1.05 to 1.45s with LH higher LH power actually raises the density near the grill a bit. hard to see in the picture, but clear in the raw phase.
Oct 28 2010 05:00:53:853PM	1101028031	Cornwall Lau	good shot. Last shot of the day. Thanks everyone

Physics Operator Comments
Oct 28 2010 08:59:46:710AM	1101028001	Steve Wukitch	load startup from 1101026026 seg 1 adjust prepuff for cryopump on pulse_gas4 to 40 ms reduce plasma current to 550 A nl_04 goes negative to ensure no late gas puffs - better to get repeatable low density discharges Load at 28-Oct-2010 08:53:34.00
Oct 28 2010 09:11:02:747AM	1101028001	Steve Wukitch	result: plasma into rampdown next: USN use seg 3, slow current rise to avoid overshoot - 500 kA at 0.1 to 450 kA, lower density feedback to 0.4 at 0.25 s Load at 28-Oct-2010 09:09:03.00
Oct 28 2010 09:22:21:993AM	1101028002	Steve Wukitch	USN use seg 3, slow current rise to avoid overshoot - 500 kA at 0.1 to 450 kA, lower density feedback to 0.4 at 0.25 s Load at 28-Oct-2010 09:09:03.00 result: plasma into rampdown density and current overshoot are no better - prepuff and hard x-ray suppression provide too much gas but density settles to requested before LH
Oct 28 2010 09:35:33:323AM	1101028003	Steve Wukitch	003 repeat USN Load at 28-Oct-2010 09:22:47.00 result: plasma into rampdown, less density evolution with LH, session leader happy next: go to 700 kA, increase Ar puff to 150 ms Load at 28-Oct-2010 09:34:25.00
Oct 28 2010 09:54:50:967AM	1101028004	Steve Wukitch	004 plasma into rampdown, locked around 0.5 s next: drop current to 550 kA and density to 2.5 x 10^19, USN Load at 28-Oct-2010 09:53:56.00
Oct 28 2010 10:10:03:163AM	1101028005	Steve Wukitch	plasma into rampdown, density was not low enough next: return to LSN as 001; decrease density to 2.5 increase outer gap by 5 mm - reduced RCUR by 0.0025 Load at 28-Oct-2010 10:08:58.00
Oct 29 2010 04:45:04:367PM	1101028006	Steve Wukitch	plasma into rampdown; session leader happy right gap was okay next: peanut gallery wants a repeat; reload from segment 2; LH on at 0.8 s Load at 28-Oct-2010 10:20:05.00
Oct 28 2010 11:09:18:997AM	1101028007	Steve Wukitch	physop error - looks like load was not finished before init should have generated critical error Steve Wolfe is testing - things look okay Steve Wolfe will check the log file between init and check to verify status next: lock mode shot based on 1101021003 - segment 4 Load at 28-Oct-2010 11:07:04.00 DNB needs cell access after discharge
Oct 28 2010 11:30:49:123AM	1101028008	Steve Wukitch	result: plasma into rampdown disrupts ~1.6 s next: repeat LH has water inlet temperature alarm - checking mixing valve Load at 28-Oct-2010 11:27:47.00
Oct 28 2010 11:45:29:653AM	1101028009	Steve Wukitch	plasma into rampdown but barely next: MSE ohmic discharge, load from segment 3 Load at 28-Oct-2010 11:42:49.00
Oct 28 2010 12:00:19:760PM	1101028010	Steve Wukitch	010 plasma into rampdown good repeat of 1101019027 discharge next: repeat Load at 28-Oct-2010 11:59:57.00
Oct 28 2010 12:10:12:253PM	1101028011	Steve Wukitch	plasma into rampdown good repeat of 010 discharge next: repeat load from segment 3 loaded cornwall's discharge into segment 2 but is off Load at 28-Oct-2010 12:08:35.00
Oct 28 2010 12:21:57:147PM	1101028012	Steve Wukitch	plasma into rampdown small density increase above demand but acceptable to session leader good repeat of 1101019027 discharge next: return to 009 add ~600 kW between 1.-1.5, n||=1.6 load from segment 4 and segment 3 is off Load at 28-Oct-2010 12:21:03.00
Oct 28 2010 12:58:19:977PM	1101028014	Steve Wukitch	plasma early disruption breakdown is delayed (late breakdown) debris is ejected from the compromised inner wall tile next: retry minus injection and increase pg4 to 45 ms from 40 ms Load at 28-Oct-2010 12:57:19.00
Oct 28 2010 01:11:07:403PM	1101028015	Steve Wukitch	plasma - disruption before LH at 1 s breakdown is good locked mode as requested - source of disruption? no injections next: retry minus disruption, RCUR ramp from 0.659 to 0.662 to hold outer gap
Oct 28 2010 01:25:17:583PM	1101028016	Steve Wukitch	plasma into rampdown breakdown is slightly delayed; carbon is creeping up locked mode as requested LH is faulting next: repeat remove 5 ms from pg4 Load at 28-Oct-2010 13:24:57.00
Oct 28 2010 01:40:32:940PM	1101028017	Steve Wukitch	plasma into rampdown locked mode as requested LH was better next: onto Cornwall's MP, cell access load from segment 2, USN discharge from 1101020004 800 kA, nl04 to 8x10^19 add 5 ms to prepuff (pg4) Load at 28-Oct-2010 13:40:14.00
Oct 28 2010 01:53:11:460PM	1101028018	Steve Wukitch	plasma into rampdown breakdown was little earlier next: increase outer gap to 1.5 cm RCUR to 0.659, pg4 to 50 ms Load at 28-Oct-2010 13:51:44.00
Oct 28 2010 02:08:25:873PM	1101028019	Steve Wukitch	plasma into rampdown gap was better - LH/ICRF well behaved breakdown is little late next: raise IP to 1 MA, pg4 to 45 ms Load at 28-Oct-2010 14:07:41.00
Oct 28 2010 02:23:15:280PM	1101028020	Steve Wukitch	plasma - disruption at 0.4 s breakdown was unchanged next: change CLEARIN to keep plasma off inner wall before 0.3 s Load at 28-Oct-2010 14:22:24.00
Oct 28 2010 03:02:12:310PM	1101028021	Steve Wukitch	plasma - disruption at 1.2 s late breakdown soft x-ray increase suggest metallic injection next: raise nl_04 to 1.2 Load at 28-Oct-2010 14:40:03.00
Oct 28 2010 03:02:25:830PM	1101028022	Steve Wukitch	plasma - disruption at 1.1 s late breakdown soft x-ray increase suggest metallic injection confirmed tungsten injection next: EF4U more negative -1290 A from -1280 A moved RXU 5 mm more negative Load at 28-Oct-2010 14:56:53.00
Oct 28 2010 03:09:22:090PM	1101028023	Steve Wukitch	plasma - disruption at 0.6 s EF1 power supply trips power room access breakdown was better next: retry with all supplies this time Load at 28-Oct-2010 15:08:23.00
Oct 28 2010 03:36:23:290PM	1101028024	Steve Wukitch	plasma - disruption at 1.1 s better breakdown another tungsten injection next: make RXL 5 mm more negative to lift move Load at 28-Oct-2010 15:26:34.00
Oct 28 2010 03:36:39:160PM	1101028025	Steve Wukitch	plasma - disruption at 1.1 s breakdown looks good another tungsten injection next: load segment two from 019, Ip = 1 MA, no LH Load at 28-Oct-2010 15:35:38.00
Oct 28 2010 03:51:03:770PM	1101028026	Steve Wukitch	plasma into rampdown breakdown looks good no tungsten injection (no LH) next: repeat with LH at 300 kW Load at 28-Oct-2010 15:50:37.00
Oct 28 2010 04:02:14:720PM	1101028027	Steve Wukitch	plasma into rampdown breakdown is good no tungsten injection (LH 300-400 kW) no power room data for ICRF and reflectometer awaiting daqc resolution next: repeat Load at 28-Oct-2010 16:01:19.00
Oct 28 2010 04:19:24:550PM	1101028028	Steve Wukitch	plasma into rampdown breakdown is good; but early hard x-ray spike at 0.12 s cell access for diagnostics next: lower density to nl_04=0.4 and Ip=0.8 MA Load at 28-Oct-2010 16:18:51.00
Oct 28 2010 04:45:52:397PM	1101028029	Steve Wukitch	plasma into rampdown bouncer - worse than 028, more hard x-rays Bz looks more positive than previous - either make IC_EF4 more positive or more gas next: repeat, lets try just adjusting IC_EF4 to -1280 from -1290 Load at 28-Oct-2010 16:35:53.00
Oct 28 2010 04:50:07:873PM	1101028030	Steve Wukitch	plasma into rampdown no bounce on startup next: repeat, change LH/ICRF Load at 28-Oct-2010 16:46:55.00
Oct 28 2010 05:00:02:527PM	1101028031	Steve Wukitch	031 plasma into rampdown density increase is larger with E and LH on simultaneously breakdown later maybe chose to adjust IC_EF4 to -1290 and increase gas puff EoR

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:00:20:017AM	Plasma	Ok
2	09:13:00:297AM	Plasma	Ok
3	09:27:04:537AM	Plasma	Ok
4	09:41:59:767AM	Plasma	Ok
5	09:55:02:820AM	Plasma	Ok
6	10:10:19:127AM	Plasma	Ok
7	10:28:22:803AM	Plasma	Bad	Power supplies barely turned on?
8	11:11:19:250AM	Plasma	Ok
9	11:30:44:360AM	Plasma	Ok
10	11:48:02:107AM	Plasma	Ok
11	12:01:07:547PM	Plasma	Ok
12	12:14:25:913PM	Plasma	Ok
13	12:28:37:973PM	Plasma	Ok
14	12:42:21:363PM	Plasma	Ok
15	12:58:52:053PM	Plasma	Ok
16	01:15:58:000PM	Plasma	Ok
17	01:29:17:500PM	Plasma	Ok
18	01:43:01:913PM	Plasma	Ok
19	01:58:41:003PM	Plasma	Ok
20	02:12:22:867PM	Plasma	Ok
21	02:29:22:177PM	Plasma	Ok
22	02:42:52:653PM	Plasma	Ok
23	02:57:54:240PM	Plasma	Bad	EF1 Type 1 Flt
24	03:14:24:813PM	Plasma	Ok
25	03:28:03:560PM	Plasma	Ok
26	03:40:55:530PM	Plasma	Ok
27	03:53:13:870PM	Plasma	Ok
28	04:08:01:513PM	Plasma	Ok
29	04:25:38:223PM	Plasma	Ok
30	04:39:49:880PM	Plasma	Ok
31	04:53:47:670PM	Plasma	Ok

System Availability

Oct 28 2010 08:59:58:887AM

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 no 3/26/10 Bottle Removed From Cell, monitors powered down, Autodialer function bypassed Mar 26 2010 05:29PM (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 are still not available. Jul 22 2010 08:41AM (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 differential phase (profile) working since 8/27/2010. full phase (fluctuations + profile) is not. If put on a miniproposal, please request LH launcher to be moved in Oct 05 2010 11:26AM (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 Spectra being collected and tree filled. Wavelength scan is broken so fixed on the Mo XXXI and XXXII lines. Jul 15 2010 08:28AM (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. AM (2 * 39.51) MHz. Jul 19 2010 05:54PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,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 yes On 1100817xxx the system is fully connected. These are still some noise issues but the system should be in better shape than the previous week. Aug 17 2010 08:53AM (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 Operational. Raw spectra stored but not line brightness time histories are going into the tree yet. Aug 24 2010 09:17AM (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