Miniproposals

Miniproposal: 591 Date Filed: 1/11/2010 Title: Boundary Layer Heat Transport Experiments in H-mode Plasmas First Author: Brian Labombard Session Leader: Brian Labombard (shots 1-28)

Engineering Operator Run Comment

MP#591 - Boundary layer heat transport experiments in H-mode plasmas

Session Leader Plans

Entered: Mar 11 2010 12:18:26:900PM

Author: Brian Labombard

MP#591 - Boundary layer heat transport experiments in H-mode plasmas Primary goals for today are: (1) Record heat flux footprints of stationary EDA discharges with different toroidal fields (6.5 tesla, 4.5 tesla) for both fixed and swept strike point. Vary ICRF power. (2) Develop discharge to explore low field EDAs (2.7 tesla) with second-harmonic ICRF heating. Setup: Overnight boronization with ECDC cleanup, using parameters identical to last boronization. We will be running 6.5 and 4.5 tesla discharges today, with the possibility for 2.7 tesla discharges at the end of the run. A low-field start-up program, which proved successful before (1090923016), will be used for the 4.5 and 2.7 tesla shots. NINJA will be used. Set up will be done at run-time by GPI scientists. ICRF up to 4.5 MW or max available. Cryopump will be used all day. Shot Plan: Reload from shot#1100303009. This was a 1.0 MA, 5.4 tesla shot with a sweep programmed into RXL. Change toroidal field to 6.5 tesla. Change plasma current to 0.8 MA Set L-mode target density to NL04 ~ 1.0e20 at RF turn-on (0.8 seconds) Set ICRF on from 0.8 to 1.5 seconds. Condition RF as needed to 3.0 MW flattop. A. 0.8 MA, 6.5 tesla conditioning shots, L-mode target NL04~1.0e20 1. Establish steady EDA, PICRF~ 3.0 MW Multiple shots to condition RF to 3.0 MW and sweep strike point over divertor to remove boron layer. Optimize plasma shape, IR camera ~8 shots 2. Program fixed strike point. ~4 shots 3. RF power scan NL04~1.0e20, ICRF Power: 2.0, 1.0, then 4.5 MW Used fixed and swept strike point programming ~8 shots B. 0.8 MA, 4.5 tesla flattop, L-mode target NL04~1.0e20 Use low-field start-up programming from 1090923016 1. Establish steady EDA, PICRF~ 3.0 MW ~2 shots 2. RF power scan NL04~1.0e20, ICRF Power: 2.0, 1.0, then 4.5 MW Used fixed and swept strike point programming ~8 shots If things go ahead of schedule: C. 0.6 MA, 2.7 tesla flattop, L-mode target NL04~0.7e20 1. Establish steady EDA, PICRF~ 3.0 MW Fixed strike-point.

Physics Operators Plans

Entered: Mar 9 2010 03:38:42:343PM

Author: Earl Marmar

Plan for 10 March, 2010 MP#591 - Boundary layer heat transport experiments in H-mode plasmas SL: LaBombard PO: Marmar ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1100303009, EXCEPT TF PLC Current Limit set to 185kA 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 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 ENABLED Enable gatevalves and shutters: ECE, VUV, HiREX Sr, Z-bolo Torvac gatevalve toggle (yes/no): no Boronization(yes/no): YES, overnight prior to run Overnight ECDC (yes/no): YES, see boronization plan ICRF(yes/no): YES LH(yes/no): no Cryopump (yes/no): YES Vessel temperature: 35/35/35 Overnight boronization (as close as possible to overnight prior to 1100304) Gas: 10% B_2D_6, 90% He Bottle pressure change ~120 psi (this will probably empty the current bottle) TC6:~80 mT rmin/rdwell/rmax: 44/52/103 cm tdwell/tsweep: 60/120 s EF4 current: 0 A ____________________________ Post boronization ECDC: 1st Gas Setup: Gas: Helium-4 sweep: 44/45/103cm scan: 20/120 s Pressure: 6e-5 Torr Duration:2 Hrs. 2nd Gas Setup Gas: D2 sweep: 44/45/103 cm scan: 20/120 s Pressure: 2e-4 Torr Duration: 1 Hr.

Session Leader Summaries

Entered: Mar 11 2010 12:19:15:103PM

Author: Brian Labombard

Run Summary for 1100310 MP#591 "Boundary layer heat transport experiments in H-mode plasmas" The primary goal for today's experiments was to record heat flux footprints of stationary EDA discharges at 6.2 tesla and 4.5 tesla under a range of ICRF powers with both fixed and swept strike point programming. A secondary goal was to develop discharges to explore heat flux profiles in low-field EDAs (2.7 tesla) with a second-harmonic ICRF heating scenario. Until now, experiments on MP591 had focused exclusively on 5.4 tesla discharges, exploring current, power, some modest density variations and LSN/DN topologies. Today was our chance to explore the dependence of heat flux widths on toroidal field variation. This primary goal was largely accomplished, with several shots exhibiting clean IR footprints in EDA H-modes at 6.2 and 4.5 tesla. As a bonus, we also collected some L-mode data over a modest range in ICRF powers. Our strong desire to develop discharges for heat flux footprints at half-field (2.7 tesla) was not satisfied today. We will need to tackle these data on another run day. By now, the recipe for setting up MP591 had become routine. We started with a fresh boronization, and used strike-point sweeps to clean off the divertor tiles in 0.8 MA, 6.2 tesla discharges as the RF conditioned up. The E-port ICRF antenna had some spurious trip signals from noise pickup, which did not get resolved for a number of shots. So clean power from this system was not available until near the end of the run. By shot#10 we were ready to run with fixed strike points and to optimize for some IR footprints. Shots 11, 12, 13, 14 and 16 were good EDA H-modes with RF power between 2.5 and 3.8 MW. The RF wasn't always clean but adequate in most cases. Shots 17, 18, 19 were attempts at lower ICRF power, resulting in steady L-mode (17) or L-modes with late EDAs (18,19). The latter two shots gave us some nice L versus H-mode comparisons at 6.2 tesla. The only shot in this series with a swept strike point was 13. Shot#20 was the first at 4.5 tesla. For some reason H-modes were tougher to achieve than anticipated. We got a variety of L-modes, multiple EDAs, some ELM-free H-modes as we varied RF power (2 to 3.8 MW) and density program (NL04 ~ 0.9 to 1.1) in search for a single steady EDA. Good L-mode and H-mode footprints were obtained. Shot#28 was the best, with a steady EDA and a very clean RF pulse at the 3.8 MW level. We ended up turning the cryopump off for this shot (and shot#27) because it seemed that the pulsed gas system could not keep up with the pumping. Shot#28 was a great shot to end with, demonstrating that the RF is all conditioned up for tomorrow's run, which unfortunately is not for MP591. Between-shot analysis went well today. The IR camera was automatically stabilized on all shots and we tried out the new 'qflux_2d_cmod' thermal model for the outer divertor ramped tiles between shots. Using this program, we were able to view the heat flux profile evolution as inferred from the inputted IR temperature distributions. As we expected, heat flux profiles are quite narrow, mapping to something like ~2 mm at the outer midplane. They get narrower in H-mode, no surprise; they do not seem to exhibit any obvious dependence on the toroidal field variation obtained (4.5, 6.2 tesla). It is clear that we have a lot of work to do on the analysis front, such as removing background IR light and accounting for the thermal properties of boron coatings. But the fact that we are now addressing these issues is an indication of tremendous progress, given that we started this business from zero just a few long months ago. Shot Log 1-LSN, 6.5 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode ICRF conditioning,J only G-side_rat 1.2 mtorr swept strike point beyond probe#8 probes have boron coating Prad foil 2pi - noisy Prad Main Foil ~ 0.5 MW Thermocouple data ok. 2-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode ICRF conditioning,J+D only G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad foil 2pi - noisy Prad Main Foil ~ 1 MW peak Thermocouple data ok. 3-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, early injection ICRF conditioning,J+D only G-side_rat 0.6 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.2 MW Thermocouple data ok. 4-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on Short H-mode ICRF conditioning,J+D only G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.75 MW during H-mode 5-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on another short H-mode ICRF conditioning,J+D only G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.75 MW during H-mode 6-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.9 to 1.2s ICRF conditioning,J+D only ~ 2.5 MW G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.8 MW during H-mode 7-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on short H-mode ICRF conditioning,J+D only ~ 3 MW peak G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating 8-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.8 to 1.05 s ICRF conditioning,J+D only ~ 3 MW peak G-side_rat 0.8 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating 9-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.88 to 1.12 s ICRF conditioning,J+D only ~ 3 MW peak G-side_rat 0.7 mtorr at RF turn-on Next: go to fixed strike point 10-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.88 to 1.12 s with RF at 2.5 MW G-side_rat 0.6 mtorr at RF turn-on Fixed strike point. 11-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.83 to 1.4 s with RF at 2.5 MW - good shot G-side_rat 0.6 mtorr at RF turn-on Fixed strike point. IR data look good. 12-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on steady EDA with RF at 2.5 MW - good shot G-side_rat 0.6 mtorr at RF turn-on Fixed strike point. IR data look good. Back to strike point sweep 13-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on evolving EDA with RF at 2.5 MW and some trips - good shot G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 IR data look good. Prad Main Foil ~ 2.5 MW Back to fixed strike point 14-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA with RF at 3.8 to 3 MW, E tripping G-side_rat 0.5 mtorr at RF turn-on Fixed strike point IR data look good. 15- early disruption 16-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA with RF at 3.8 MW some tripping Central Te, neutrons drop out at 1.13 seconds - injection? G-side_rat 0.52 mtorr at RF turn-on Fixed strike point. 17-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, ICRF ~ 1.8 MW G-side_rat 0.52 mtorr at RF turn-on Fixed strike point IR data look good. 18-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then late EDA 1.2 seconds, ICRF ~ 2.5 tripping down to 1.8 MW G-side_rat 0.54 mtorr at RF turn-on Fixed strike point Good IR data - nice comparison of H-mode and L-mode footprints 19-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then late EDA 1.35 seconds, ICRF ~ 2.4 during L-mode G-side_rat 0.54 mtorr at RF turn-on Fixed strike point Good IR data - another nice comparison of H-mode and L-mode footprints Next: go to 4.5 tesla 20-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then late EDA 1.35 seconds, ICRF ~ 2.0 MW during L-mode G-side_rat 0.62 mtorr at RF turn-on Fixed strike point Good IR data - comparison of H-mode and L-mode footprints at 4.6 tesla 21-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then H-mode at ramp down when RF power increases ICRF ~ 2.7 MW during L-mode G-side_rat 0.58 mtorr at RF turn-on Fixed strike point 22-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on evolving EDA 0.9 to 1.3 s, then L to H again ICRF ~ 2.6 MW during L-mode, after an initial 3 MW G-side_rat 0.61 mtorr at RF turn-on Fixed strike point Good IR data in EDA phase. Prad Main Foil ~ 2MW 23-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on two evolving EDAs ICRF ~ 3 MW G-side_rat 0.61 mtorr at RF turn-on Fixed strike point Prad Main Foil ~ 2MW 24-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on L-mode followed by late EDA at 1.34 s ICRF ~ 3 MW, very clean G-side_rat 0.68 mtorr at RF turn-on Fixed strike point 25-LSN, 4.6 tesla, 0.8 MA, NL04~0.8 at RF turn-on two ELM-free followed by H-L, disruption ICRF ~ 2.8 MW, very clean G-side_rat 0.48 mtorr at RF turn-on Fixed strike point 26-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on, but then droops ELM-free followed by H-L disruption ICRF ~ 3.5 MW, very clean G-side_rat 0.48 mtorr at RF turn-on Fixed strike point No Cryopump on next shot 27-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on, but then droops L then steady EDA at 1.13 s ICRF ~ 3.5 MW G-side_rat 0.8 mtorr at RF turn-on Fixed strike point 28-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on, but then droops EDA with ramping density starting at RF turn on ICRF ~ 3.8 MW, very clean - good shot Fixed strike point Clean IR footprint. qflux_2d produces some nice q_surface profiles.

Physics Operator Summaries

Session Leader Comments
Mar 10 2010 10:17:30:423AM	1100310001	Brian Labombard	1-LSN, 6.5 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode ICRF conditioning,J only G-side_rat 1.2 mtorr swept strike point beyond probe#8 probes have boron coating Prad foil 2pi - noisy Prad Main Foil ~ 0.5 MW Thermocouple data ok
Mar 10 2010 10:17:48:377AM	1100310002	Brian Labombard	2-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode ICRF conditioning,J+D only G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad foil 2pi - noisy Prad Main Foil ~ 1 MW peak
Mar 10 2010 10:17:59:410AM	1100310003	Brian Labombard	3-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, early injection ICRF conditioning,J+D only G-side_rat 0.6 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.2 MW Thermocouple data ok.
Mar 10 2010 10:18:11:440AM	1100310004	Brian Labombard	4-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on Short H-mode ICRF conditioning,J+D only G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.75 MW during H-mode
Mar 10 2010 10:18:33:503AM	1100310005	Brian Labombard	5-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on another short H-mode ICRF conditioning,J+D only G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.75 MW during H-mode
Mar 10 2010 11:14:31:363AM	1100310006	Brian Labombard	6-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.9 to 1.2s ICRF conditioning,J+D only ~ 2.5 MW G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating Prad AXUV 2pi x 2.6 ~ 0.8 MW during H-mode
Mar 10 2010 11:14:41:457AM	1100310007	Brian Labombard	7-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on short H-mode ICRF conditioning,J+D only ~ 3 MW peak G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating
Mar 10 2010 11:14:58:003AM	1100310008	Brian Labombard	8-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.8 to 1.05 s ICRF conditioning,J+D only ~ 3 MW peak G-side_rat 0.8 mtorr at RF turn-on swept strike point beyond probe#8 probes have boron coating
Mar 10 2010 11:53:05:097AM	1100310009	Brian Labombard	9-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.88 to 1.12 s ICRF conditioning,J+D only ~ 3 MW peak G-side_rat 0.7 mtorr at RF turn-on Next: go to fixed strike point
Mar 10 2010 12:24:01:137PM	1100310010	Brian Labombard	10-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.88 to 1.12 s with RF at 2.5 MW G-side_rat 0.6 mtorr at RF turn-on Fixed strike point.
Mar 10 2010 12:45:24:537PM	1100310011	Brian Labombard	11-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA 0.83 to 1.4 s with RF at 2.5 MW - good shot G-side_rat 0.6 mtorr at RF turn-on Fixed strike point. IR data look good.
Mar 10 2010 01:20:11:937PM	1100310012	Brian Labombard	12-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on steady EDA with RF at 2.5 MW - good shot G-side_rat 0.6 mtorr at RF turn-on Fixed strike point. IR data look good
Mar 10 2010 01:20:25:950PM	1100310013	Brian Labombard	13-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on evolving EDA with RF at 2.5 MW and some trips - good shot G-side_rat 0.7 mtorr at RF turn-on swept strike point beyond probe#8 IR data look good. Prad Main Foil ~ 2.5 MW
Mar 10 2010 01:21:11:013PM	1100310014	Brian Labombard	14-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on EDA with RF at 3.8 to 3 MW, E tripping G-side_rat 0.5 mtorr at RF turn-on Fixed strike point IR data ok, strike point is lower for some reason.
Mar 10 2010 02:23:18:900PM	1100310017	Brian Labombard	17-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, ICRF ~ 1.8 MW G-side_rat 0.52 mtorr at RF turn-on Fixed strike point IR data look good
Mar 10 2010 02:40:05:450PM	1100310018	Brian Labombard	18-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then late EDA 1.2 seconds, ICRF ~ 2.5 tripping down to 1.8 MW G-side_rat 0.54 mtorr at RF turn-on Fixed strike point Good IR data - nice comparison of H-mode and L-mode footprints
Mar 10 2010 03:12:20:940PM	1100310019	Brian Labombard	19-LSN, 6.2 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then late EDA 1.35 seconds, ICRF ~ 2.4 during L-mode G-side_rat 0.54 mtorr at RF turn-on Fixed strike point Good IR data - another nice comparison of H-mode and L-mode footprint
Mar 10 2010 03:36:29:140PM	1100310020	Brian Labombard	20-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on L-mode, then late EDA 1.35 seconds, ICRF ~ 2.0 MW during L-mode G-side_rat 0.62 mtorr at RF turn-on Fixed strike point Good IR data - comparison of H-mode and L-mode footprints at 4.6 tesla
Mar 10 2010 04:02:36:560PM	1100310022	Brian Labombard	22-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on evolving EDA 0.9 to 1.3 s, then L to H again ICRF ~ 2.6 MW during L-mode, after an initial 3 MW G-side_rat 0.61 mtorr at RF turn-on Fixed strike point Good IR data in EDA phase. Prad Main Foil ~ 2MW
Mar 10 2010 04:03:13:640PM	1100310023	Brian Labombard	23-LSN, 4.6 tesla, 0.8 MA, NL04~1.0 at RF turn-on two evolving EDAs ICRF ~ 3 MW G-side_rat 0.61 mtorr at RF turn-on Fixed strike point Prad Main Foil ~ 2MW
Mar 10 2010 04:24:58:240PM	1100310024	Brian Labombard	24-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on L-mode followed by late EDA at 1.34 s ICRF ~ 3 MW, very clean G-side_rat 0.68 mtorr at RF turn-on Fixed strike point
Mar 10 2010 04:53:32:260PM	1100310025	Brian Labombard	25-LSN, 4.6 tesla, 0.8 MA, NL04~0.8 at RF turn-on two ELM-free followed by H-L, disruption ICRF ~ 2.8 MW, very clean G-side_rat 0.48 mtorr at RF turn-on Fixed strike point
Mar 10 2010 04:54:17:667PM	1100310026	Brian Labombard	26-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on, but then droops ELM-free followed by H-L disruption ICRF ~ 3.5 MW, very clean Fixed strike point
Mar 10 2010 05:43:09:067PM	1100310027	Brian Labombard	27-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on, but then droops L then steady EDA at 1.13 s ICRF ~ 3.5 MW G-side_rat 0.8 mtorr at RF turn-on Fixed strike point
Mar 10 2010 05:43:19:020PM	1100310028	Brian Labombard	28-LSN, 4.6 tesla, 0.8 MA, NL04~1.1 at RF turn-on, but then droops EDA with ramping density starting at RF turn on ICRF ~ 3.8 MW, very clean - good shot Fixed strike point Clean IR footprint. qflux_2d produces some nice q_surface profiles

Physics Operator Comments
Mar 10 2010 09:20:01:590AM	1100310001	Earl Marmar	load from 1100303009 TF current to 180 kA in segment 2 nl_04 target to 1e20 Ip to 0.8 MA argon enabled and puff increased to 100 ms (starting at 300 ms) plasma, full length startup looks ok early marfe, but it doesn't seem to bother anything
Mar 10 2010 09:35:31:560AM	1100310002	Earl Marmar	TF current to 171 kA in segment 2 plasma, full length slight pause around 11 ms early marfe is smaller some early hards
Mar 10 2010 09:47:47:060AM	1100310003	Earl Marmar	TF current to 171.8 kA in segment 2 plasma, full length
Mar 10 2010 10:05:33:690AM	1100310004	Earl Marmar	no dpcs changes plasma, full length possible early bounce brief H-mode around 1 s
Mar 10 2010 10:22:49:773AM	1100310005	Earl Marmar	prefill puff to 54 ms (from 49 ms) plasma, full length EDA-ish H-mode at ~2 MW RF power
Mar 10 2010 10:45:00:203AM	1100310006	Earl Marmar	no dpcs changes plasma, full length bounce, some hards
Mar 10 2010 10:56:25:920AM	1100310007	Earl Marmar	prefill puff to 57 ms (from 54 ms) plasma, full length startup bounce looks worse, but no obvious ill effects on the rest of the shot
Mar 10 2010 11:09:31:497AM	1100310008	Earl Marmar	no dpcs changes plasma, full length early hards reappearing
Mar 10 2010 11:39:40:673AM	1100310009	Earl Marmar	no dpcs changes plasma, full length startup looks better; no hards
Mar 10 2010 12:07:44:673PM	1100310010	Earl Marmar	stop sweeping the strike RXL and ZXL flat across the middle of the shot, at the values from shot 9 at 0.7 seconds disable argon puff plasma, full length
Mar 10 2010 12:24:22:827PM	1100310011	Earl Marmar	flattop RXL to 0.0068 flattop ZXL to -0.00235 plasma, full length startup looks ok
Mar 10 2010 12:41:49:640PM	1100310012	Earl Marmar	no dpcs changes plasma, full length big bounce on startup, but subsequent plasma does not seem to mind much a few early hards
Mar 10 2010 12:57:23:500PM	1100310013	Earl Marmar	load segment 2 from 1100310009 into segment 2 (sweeping strike point) plasma, full length
Mar 10 2010 01:18:37:967PM	1100310014	Earl Marmar	reload shot 12 (fixed strike) plasma, full length hard bounce on startup, a few hards
Mar 10 2010 01:36:22:987PM	1100310015	Earl Marmar	prefill puff to 61 ms (from 57 ms) early disruption (0.2 s) something fell in?
Mar 10 2010 01:42:52:837PM	1100310016	Earl Marmar	no dpcs changes plasma, full length ratty startup, hards this one just gets past the big injection at 0.2 s
Mar 10 2010 02:04:10:097PM	1100310017	Earl Marmar	prefill puff to 59 ms (from 61 ms) plasma, full length still ratty on the startup, but it went
Mar 10 2010 02:33:41:147PM	1100310018	Earl Marmar	no dpcs changes plasma, full length
Mar 10 2010 02:33:45:957PM	1100310019	Earl Marmar	no dpcs changes plasma, full length
Mar 10 2010 03:31:21:053PM	1100310020	Earl Marmar	TF current to 125 kA in segment 2 plasma, full length
Mar 10 2010 03:32:21:493PM	1100310021	Earl Marmar	no dpcs changes plasma, full length startup is ok, no hards
Mar 10 2010 03:51:59:343PM	1100310022	Earl Marmar	no dpcs changes plasma, full length
Mar 10 2010 04:01:00:073PM	1100310023	Earl Marmar	no dpcs changes plasma, full length startup bounce a few hards
Mar 10 2010 04:10:59:210PM	1100310024	Earl Marmar	nl_04 to 1.1e20 plasma, full length bouncy start-up most hards so far today
Mar 10 2010 04:44:10:233PM	1100310025	Earl Marmar	nl_04 to 0.9 e20 plasma, disrupt at 1.37 s
Mar 10 2010 04:44:27:420PM	1100310026	Earl Marmar	nl_04 to 1.1 e20 plasma, disrupt at 1.5 s
Mar 10 2010 04:51:05:380PM	1100310027	Earl Marmar	cryopump warm prefill puff to 22 ms (from 59 ms) plasma, full length bouncy startup, early hards
Mar 10 2010 05:18:48:430PM	1100310028	Earl Marmar	no dpcs changes plasma, disrupt at 1.57 s (just after start of rampdown) best looking startup of the day, no hards

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:11:23:410AM	Plasma	Ok
2	09:24:42:423AM	Plasma	Ok
3	09:39:02:143AM	Plasma	Ok
4	09:52:46:847AM	Plasma	Ok
5	10:11:24:993AM	Plasma	Ok
6	10:31:05:530AM	Plasma	Ok
7	10:46:45:317AM	Plasma	Ok
8	11:04:35:103AM	Plasma	Ok
9	11:29:18:693AM	Plasma	Ok
10	11:49:58:797AM	Plasma	Ok
11	12:17:00:087PM	Plasma	Ok
12	12:32:23:007PM	Plasma	Ok
13	12:49:07:680PM	Plasma	Ok
14	01:06:52:500PM	Plasma	Ok
15	01:23:29:190PM	Plasma	Ok
16	01:37:17:580PM	Plasma	Ok
17	01:52:58:567PM	Plasma	Ok
18	02:09:33:773PM	Plasma	Ok
19	02:26:45:903PM	Plasma	Ok
20	02:41:51:403PM	Plasma	Ok
21	03:24:17:110PM	Plasma	Ok
22	03:39:15:830PM	Plasma	Ok
23	03:52:19:017PM	Plasma	Ok
24	04:06:16:207PM	Plasma	Ok
25	04:19:23:733PM	Plasma	Ok
26	04:32:15:140PM	Plasma	Ok
27	04:45:19:530PM	Plasma	Ok
28	04:57:58:593PM	Plasma	Ok

System Availability

Mar 10 2010 09:10:59:923AM

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 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Nov 13 2009 06:37AM (dekow) Jim Irby Boronization dekow,irby CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes Operational Nov 09 2009 09:12AM (irby) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (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 and operating; not yet calibrated Jul 14 2009 02:22PM (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   Nov 09 2009 09:13AM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes All channels working and calibrated. Feb 02 2010 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (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. Jul 28 2009 04:23PM (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 poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Oct 27 2009 10:39AM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Laser Blow-Off yes Requires some advance notice for laser start-up Oct 16 2009 12:46PM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (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 Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes Power back on morning of 11/09 before run Nov 09 2009 09:10AM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry PCI yes Operational. Nov 12 2009 02:36PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,ennever,ntsujii,porkolab Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (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 Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes   Nov 13 2009 06:38AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes Since 1100120000 the system is operational except for channel 110 which is not installed Jan 20 2010 09:17AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Sparker yes Sparker back in operation before 11/09 run Nov 09 2009 09:11AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 2 lasers working. 15 spatial channels operational. Calibrated Oct 13 2009 07:49PM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang TS - Edge yes Operational, and calibrated. Oct 11 2009 03:01PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke