Miniproposals

Miniproposal: 630 Date Filed: 12/3/2010 Title: Expanding the operating space of high performance impurity seeded EDA H-modes First Author: Matt Reinke Session Leader: Matt Reinke (shots 1-27)

Engineering Operator Run Comment

MP 630: Expanding the operating space of high performance impurity seede

Session Leader Plans

Entered: Dec 13 2010 09:50:15:173AM

Author: Matt Reinke

MP 630: Expanding the operating space of high performance impurity seeded EDA H-modes The goal of this run will be to take our favorable seeding results from a low-elongation, high-q plasma that was run for MP 564 and apply the seeding techniques to higher current (Ip ~ 1.3 MA) and elongation (kappa ~ 1.7). We will then move to lower current (Ip < 0.8 MA) to try and increase pedestal beta and global beta_N. Lastly, we will repeat earlier shots in the scan to assess the level hysteresis of boronization when impurity seeding is used. This run will take place over two days, 1101215 (9 am - 3 pm) and 1101216 (9 am - 1 pm). In between the run days, NO machine conditioning (ECDC, bakes, etc.) should be done in order to investigate the day-to-day repeatability. DIAGNOSTICS: ------------ everything to measure Te, ne, Ti, Er, (tor/pol) rotation profile diagnostics: Thomson scattering, GPC1, GPC2 (All shots at 5.4 T) FRCECE, TCI, HIREXSR, core DNB-CXRS, edge DNB-CXRS, GPI-CXRS inner+outer. fluctuations, mainly for QCM characterization but also for low freq (<100 kHz) modes seen during previous seeding: Fast magnetics, reflectometer, fast FRCECE, PCI, GPI (using D2) impurity spectroscopy: XEUS to measure Ne and N2 brightness McPherson to measure Mo brightness and ICRF-related impurity injections (Ni,Cu,Ti) divertor/limiter heat flux: IR camera, Langmuir probes, surface thermocouples, tile thermocouples fast ions: CNPA, FIDA (?) Boronization: ------------- should follow the latest recipe to give positive results: - max sweep to 80 cm - 3 hr ECDC in He only Gas Setup: ---------- - need to have N2, Ne and Ar available on the gas manifold - B-SIDE-LOWER: 4.0 psi Ne - H-BOTTOM: 1.0 psi Ar - NINJA: use D2, consult with PO/SL on puff levels/timing 1) Boronization Recovery (3-4 shots) ======================== Load 1100903028 (Ip=0.8, nl04~0.8, LSN, kappa~1.55). Change B-SIDE-LOWER puff to 0.4-0.6 @ 80V. Set H-BOTTOM to 0.30-0.32 @ 50 V. ICRF power from 3.0-4.0 MW from 0.6-1.5 seconds. As necessary, use only D+E in rampdown to assist in disruption avoidance a) increase ICRF power to 4-5 MW, adjust seeding level as necessary for divertor protection/ICRF performance 2) Equilibrium Changes (2-3 shots) ====================== Over the next few shots perform the following changes to equilibrium (based on a 1050426022 comparison) If boronization recovery is slow, combine (1) and (2) a) increase KAPPA >= 1.7 b) decrease lower ZSEPS < -40.5 cm c) outer strike point to second tile from the bottom of the outer divertor d) inner strike point to bottom tile of the skirt **After desired shape is reached, adjust diagnostic views (TS, IR) as necessary*** 3) Current Scan Up (10-20 shots) ================== Increase current by 100 kA, increase target nl04 by > 0.1x10^20. At each current point, run two shots. First shot have ICRF at 4-5 MW and for second, increase to 5-6 MW. a) Ip=0.9 MA b) Ip=1.0 MA c) Ip=1.1 MA d) Ip=1.2 MA e) Ip=1.3 MA (or current that achieves q95~3) If neutral pressure limits on ICRF start to become a problem, enable cryopump and/or HFS D2 fueling with NINJA. If peak heat flux on the lower divertor becomes an issue, move to N2 seeding (25 psi, B-SIDE-LOWER). In the unlikely event that shots remain at this point, work to optimize N2 or Ne puffing at the high current point. *****LIKELY BREAK POINT FOR 1101215 and 1101216***** 4) Boronization Hysteresis (2 shots) ========================== At the beginning of the 2nd run day, repeat selected discharges from parts (3) and in order to test the repeatability across run days and ICRF input MJ a) Ip=0.9 MA b) Ip=1.1 MA 5) Current Scan Down (4-8 shots) ==================== Decrease current by 50 kA steps, keep target nl04~0.8x10^20, return to Ne seeding. At each current point, run two shots. Start with ICRF at 4-5 MW. increase to 5-6 MW a) Ip=0.7 MA b) Ip=0.6 MA Work to decrease current until evidence of a large amount of fast-ion loss (limiter heating, CNPA signal) becomes apparent. 6) More Boronization Hysteresis (3 shots) =============================== Repeat selected discharges from parts (3) and (5) in order to test the repeatability over ICRF input MJ. a) Ip=0.9 MA b) Ip=1.2 MA c) Ip=0.6 MA

Physics Operators Plans

Entered: Dec 13 2010 10:01:55:677PM

Author: Jerry Hughes

PO Plan for 15 Dec 2010 MP630: Expanding the operating space of high performance impurity seeded EDA H-modes PO: J. Hughes SL: M. Reinke This is the first day of a two-part run. This run will begin at 09:00 and end at 15:00. There is to be NO ECDC between the end of this run and the start of Thursday's run! ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 15:00 ***Note early end time*** Power systems as on: 1100903028 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 4 psi Ne Hybrid enabled (PG1) fill H-bottom with 1 psi Ar Hybrid enabled (PG5) 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 NOTE: Have N2 available on the gas manifold for possible use later in the day. 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 overnight followed by morning ECDC: **BORONIZATION PARAMETERS: dP: 120 psi rmin/rdwell/rmax: 44/75/80 cm tdwell/tsweep: 60/120 s EF4 current: 0 A **ECDC PARAMETERS, following boronization: --gas: He --Pressure: 1e-4 Torr --sweep: 45/43/103 cm --scan: 20/120 s --Duration: 3 hours ICRF: yes, all transmitters needed for D(H) heating at 5.4T LH: no Cryopump: have available, but NOT on first shot DNB: yes Vessel temperature: 45/45/45 SL plan calls for (1) boronization recovery with Ne puffing, (2) shape development, (3) current scan up, (4) boronization hysteresis, (5) current scan down and (6) more boronization hysteresis. We are not likely to get past (3) in today's run. Therefore I will truncate my PO plan at SL's (4). Detailed plan: FIRST SHOT: SL requests a load of 1100903028 (Ip=0.8, nl04~0.8, LSN, kappa~1.55) This shot had three active segments. We want segment 3. To do this I'll load a recent shot with normal non-cryopumped startup: 1101208030. Keep Seg 1 and replace Seg 2 with Seg 3 from 1100903028. Reset start time of Seg 2 to 0.1s, as is typical. Checking DPCS_PIEZO_CHOPPER is ON and its outputs read: ["pulse_gas3","h-bot ","pulse_gas1"] Create PG1 puff (Ne) from 0.4-0.6 @ 80V. Create PG5 puff (Ar) from 0.30-0.32 @ 50 V. Saved to /home/jwhughes/physop/pcs_scratch as shot 1101215666. RUN PLAN: (1) Boronization Recovery ======================== Load the above shot and run with ICRF power from 3.0-4.0 MW from 0.6-1.5s. As necessary, use only D+E in rampdown to assist in disruption avoidance. Increase ICRF power to 4-5 MW, and adjust seeding level as necessary for divertor protection/ICRF performance 2) Equilibrium Changes ====================== Over the next few shots, elongate the plasma and lower the X-point/strike. If boronization recovery is slow, combine (1) and (2). SL has chosen a target equilibrium from shot 1050426022 a) KAPPA ~ 1.7 b) lower ZSEPS < -40.5 cm c) outer strike point to second tile from the bottom of the outer divertor d) inner strike point to bottom tile of the skirt To accomplish this I will begin by: A. increasing RXL by 0.010m B. decreasing ZXL by 0.025m C. increasing ZCUR by 0.010m Then SL will evaluate the shape, and tweaks can be made to the above parameters, as well as RXU/ZXU. **After desired shape is reached, adjust diagnostic views (TS, IR) as necessary*** 3) Current Scan Up (10-20 shots) ================== At each step, increase current by 100 kA, increase target nl04 by > 0.1x10^20. SL will request changes to ICRF program, seeding characteristics. a) Ip=0.9 MA b) Ip=1.0 MA c) Ip=1.1 MA d) Ip=1.2 MA e) Ip=1.3 MA (or current that achieves q95~3) If neutral pressure limits on ICRF start to become a problem, enable cryopump and/or HFS D2 fueling with NINJA. If peak heat flux on the lower divertor becomes an issue, move to N2 seeding (have B-side lower purged and filled with N2 @25 psi; program SL's desired chop). In the unlikely event that shots remain at this point, work to optimize N2 or Ne puffing at the high current point. 4) Boronization Hysteresis (2 shots) ========================== Repeat selected discharges from parts (3)

Session Leader Summaries

Entered: Dec 15 2010 03:27:14:590PM

Author: Matt Reinke

We were rather successfull at getting through the first 1/2 of the run plan, the high current scan. ICRF conditioned up from boronization very fast, by 003 we were able to get 2.9 MJ in. We moved on to section (2), changing the shape from the 1100903 target which yielded very poor H-mode and ICRF performance, the two problems being coupled; the steadier the H-mode, the better the ICRF, and then the better the H-mode. We moved back to the original equilibrium for the current scan and got steady, Ne-seeded H-modes at 0.9 MA and 1.0 MA. We were unable to get a steady H-mode at 1.1 MA, doing a impurity density scan in both Ne and N2. We ended the day with a repeat of a 0.9 MA shot w/ N2 seeding which we'll pick up with tomorrow morning. 001-003 : BZN recovery 004-009 : shape modification @ 0.8 MA 010 : shape mod @ 0.9 MA 011-013 : back to 003 eq., increased to 0.9 MA, Ne seeding 014-015 : 1.0 MA, Ne seeding 016-022 : 1.1 MA, Ne seeding 023-026 : 1.1 MA, N2 seeding 027 : 0.9 MA, N2 seeding (Thurs. fiducial shot) 001, 008, 017, 018, 020 were early disruptions or fizzles

Physics Operator Summaries

Entered: Dec 15 2010 03:55:06:637PM

Author: Jerry Hughes

Today we ran the first of two consecutive runs associated with MP630. It will be continued tomorrow, from today's endpoint, with no overnight wall conditioning. Progress was made today on expanding the operating range for high-performance EDA H-modes using low-Z seeding. Seeding was done from B-side-lower using a chopped PG1 program. Shots 001--022 used Ne as the seed gas and 023--027 used N2. ICRF was utilized at levels up to about 5MW, and over 70MJ of total RF energy was put in. At times, plasma performance was quite good, and this run managed to break the single-run neutron production record (previously also held by M. Reinke), despite it being only a 6-hour run. The baseline discharge for this run was chosen from 1100903028. Boronization recovery in this discharge, with early Ne seeding was fairly rapid, and by shot 004 we set about getting shape changes called out in Part 1 of SL's run plan. The changes I made to X-point position and elongation on shots 004--009 were not especially conducive to obtaining a steady EDA discharge. Even when we developed a fairly good shape match to the SL's target discharge of 1050426022, it was not straightforward to access a steady EDA H-mode. After shot 010, the SL reconsidered his approach, and we reloaded the lower-elongation fiducial from 003. From here we nudged Ip and nl04 targets up, until we found the upper limit at which we could get an EDA H-mode with a good pedestal Te and H98. 1.0MA shots could be made to access this condition, but at 1.1MA, the discharges with Ne seeding were predominated by transient radiative H-modes. The N2 seeding seemedd to show more promise at 1.1MA (shots 024--026), and could probably use more optimization. One of the better-performing shots of the day was 012, at 900kA with Ne seeding. This shot was repeated at day's end with N2 puffing (027), and will be the starting target tomorrow, after the vessel sits overnight. Startups were reasonably robust today. There was a fizzle caused by an accidental vessel overpressure on shot 18. There was a fizzle on shot 20 which appeared to be field related, a problem which was amelioreted by a change to the EF4 current. The final shot had a good startup is a suitable candidate for running with no changes tomorrow morning. There were a number of disruptions during ramp-down. we had ICRF going in at low levels to try to prevent this, though we tended to still have problems between 1.7 and 1.8s. I began to reduce the current ramp-down rate on shot 16, and after that the discharges seemed to extend routinely to >1.8s. SCORECARD: Plasmas into ramp-down: 17 Disruptions in flattop: 6 (shots 001,006,007,009,010,015) Disruptions in ramp-up: 2 (shots 008,017; bricks) Fizzles: 2 (shots 018,020)

Session Leader Comments
Dec 13 2010 09:49:26:310AM		Matt Reinke	Here's an esitmate of the x-point and strike point positions desired for near the end of (2). BLACK - 1100903028 GREEN - 1050426022
Dec 14 2010 08:55:04:480AM		Matt Reinke	DIAGNOSTIC CHECKLIST: The following have e-mailed or verbally confirmed operations: XEUS/McPherson, CNPA, fast magnetics, divertor probes/thermocouples, GPC1/GPC2, HIREXSR, core CXRS, fast FRCECE, GPI, PCI, TS, edge CXRS The following have e-mailed or confirmed they will NOT be available: FIDA
Dec 15 2010 09:07:06:940AM	1101215001	Matt Reinke	3-4 MW ICRF ramp w/ Ne seeding. Repeat of 1100903008. RESULT: Early disruption, cannot tell if it's a random brick or too much Ne NEXT: Repeat, turn down Ne (50 V).
Dec 15 2010 09:17:04:550AM	1101215002	Matt Reinke	another stab at BZN recovery, with less Ne RESULT: full flatop, EDA H-mode during most of it. two Mo injections early. Good D+E, J is ratty. NEXT: repeat, pick up more ICRF
Dec 15 2010 09:33:01:820AM	1101215003	Matt Reinke	another BZN recovery shot, repeat of 002 RESULT: another steady H-mode, ICRF power up. early Mo injection but good for shot 003! strike point is low, hitting the floor. NEXT: move on to shape optimization, increase ICRF to 4-5 MW
Dec 15 2010 09:45:47:840AM	1101215004	Matt Reinke	move on to (2) decrease ZSEPS, raise the strike point position on the ODIV, increase ICRF power. RESULT: became USN unintentionally NEXT: repeat with physop changes
Dec 15 2010 10:01:08:193AM	1101215005	Matt Reinke	trying for new LSN shape RESULT: many H-modes, got the LSN, kappa up to 1.75, lower strike point still wandering around a bit. J-ANT transmitter problem. NEXT: repeat, try to hold strike point a bit steadier
Dec 15 2010 10:13:16:080AM	1101215006	Matt Reinke	trying to stablize shape changes and push ICRF power up to 4-5 MW level RESULT: Getting H/L transitions due injections, ICRF faults. NEXT: increase Ne puff to 65 V, ICRF from 3.5-4.5 MW
Dec 15 2010 10:27:25:287AM	1101215007	Matt Reinke	increase Ne, decrease ICRF seeking a better EDA RESULT: early disruption, weak EDA H-mode NEXT: lower kappa, increase nl04 target to 0.9
Dec 15 2010 10:34:12:500AM	1101215008	Matt Reinke	increase nl04, decrease kappa, looking for a better EDA RESULT: Mo brick NEXT: repeat sans brick
Dec 15 2010 10:53:25:977AM	1101215009	Matt Reinke	try again RESULT: Mo injections kill the H-mode, but QC is there and RF has good performance NEXT: start the current scan, increase Ip to 0.9 MA, increase density
Dec 15 2010 11:05:31:190AM	1101215009	Matt Reinke	start (3). Increase Ip to 0.9 MA, increase density programming to get desired nl04 > 0.9. ICRF at 3.5-4.5 MW RESULT: still poor EDA H-mode. Having trouble with ICRF. NEXT: return to equilibrium from 003, raise Ip to 0.9 MA and nl04 target to 0.9
Dec 15 2010 11:17:13:917AM	1101215011	Matt Reinke	change back to starting equilibrium (003) and see if we can get a steady EDA at higher current/density. Then drive that shot to higher Ip and make shape changes there. RESULT: much steadier EDA H-mode, RF happier, SL happier too. Mo controlled. NEXT: increase nl04 demand to 1.0, decrease Ar seeding (20 V), increase ICRF power
Dec 15 2010 11:30:05:570AM	1101215012	Matt Reinke	work with this discharge in current scan from now on. decrease the Ar a little, increase ICRF power and nl04 demand. RESULT: Ok now THAT's the stuff we've been looking for. NEXT: repeat but increase ICRF power *maniacal laughter*
Dec 15 2010 11:42:30:647AM	1101215013	Matt Reinke	repeat but with higher ICRF power RESULT: Mo injection just before 1.1 causes H/L transition, then when going back into H-mode it swallowed a bunch of Mo, increasing PRAD. It eventually pumps out and recovers,though NEXT: Increase Ip to 1.0 MA, nl04 to 1.1
Dec 15 2010 11:58:05:520AM	1101215014	Matt Reinke	Move ahead with Ip scan to 1.0 MA, nl04 target to 1.1 (should reach near 1.0). ICRF power 4-5 MW scan. RESULT: steady EDA H-mode, normalized performance down a little, PRAD up a little, NEXT: repeat shot with higher ICRF, lower Ne (40 V), turn of NINJA
Dec 15 2010 12:09:14:423PM	1101215015	Matt Reinke	Repeat the 1.0 MA EDA case, moving to higher PNET RESULT: Mo injection in the middle of the RF pulse NEXT: increase nl04 to 1.2, Ip to 1.1 MA, turn back on NINJA
Dec 15 2010 12:30:10:817PM	1101215016	Matt Reinke	Increase Ip to 1.1 MA, increase nl04 RESULT: many H-modes, more ELM-free like NEXT: increase target density
Dec 15 2010 12:40:30:327PM	1101215017	Matt Reinke	Try for higher density to get a more EDA-like plasma RESULT: Mo brick at 0.2 seconds NEXT: retry
Dec 15 2010 01:09:19:417PM	1101215019	Matt Reinke	trying to get a more EDA-like shot by raising target density RESULT: got x3 H-modes compared to the x5 on 016. Reached a nice target density, but these appear to be radiatively collapsing from low-Z NEXT: reduce Ne. Change to 3.0 psi in B-SIDE-LOWER, keep at 40 V
Dec 15 2010 01:36:48:373PM	1101215021	Matt Reinke	decreased Ne to try and decrease PRAD, help prevent radiative collapse of H-mode RESULT: PRAD increased quicker, first H/L came earlier. Looks like more Mo earlier and emissivity profile concur. NEXT: increase Ne to 70 V
Dec 15 2010 01:52:04:867PM	1101215022	Matt Reinke	Increase Ne from 019 level RESULT: Ne increase, Mo went down a little but Ne up. NEXT: Change over to N2 seeding. 20 psi N2 at 80 V from 0.5-1.4 seconds
Dec 15 2010 02:14:37:743PM	1101215023	Matt Reinke	Switching to N2 seeding to try and increase PNET, avoid the high Ip radiative collapse. Keep target the same. Filling to 15 psi and setting to 100 V since we're having trouble filling B-SIDE-LOWER. RESULT: choppy ICRF, too much or too little N2? NEXT: lower N2. 20 psi @ 60 V
Dec 15 2010 02:26:46:617PM	1101215024	Matt Reinke	Trying a lower N2 level RESULT: Better shot, much better ICRF, some Mo injections. NEXT: Increase ICRF power, decrease N2 puff to 40 V
Dec 15 2010 02:41:21:613PM	1101215025	Matt Reinke	Try for higher PNET RESULT: PRAD due to Mo higher NEXT: Put N2 back to 70 V, ICRF to 4-5 MW
Dec 15 2010 02:51:06:963PM	1101215026	Matt Reinke	Increase N2 seeding over 024 level, below 023 level RESULT: Better but not quite there yet. Will need more tweaking at some later date. NEXT: repeat 012 as an overnight fiducial. Change PG1 for N2 programming 0.5-1.4 seconds, at 60 V.
Dec 15 2010 03:09:18:200PM	1101215026	Matt Reinke	going back to lower Ip (repeat of 012) but changing seeding RESULT: initial density and stored energy trace similar to 012, but PRAD is a bit higher, (due to Mo), and performance sags. NEXT: That's all folks! We'll pick this up tomorrow morning.

Physics Operator Comments
Dec 14 2010 05:50:43:807PM		Jerry Hughes	Getting ready to load starting shot for tomorrow. Load from 1101215666 in /home/jwhughes/physop/pcs_scratch Checking my work. I made a mistake with the PG5 program. Need to change it from 80V to 50V per SL's request. Otherwise, it looks ready for prime time. Load at 14-Dec-2010 17:50:19.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done
Dec 15 2010 09:06:13:750AM	1101215001	Jerry Hughes	Shot 1: Attempt: 800kA shot with Ne seeding, RF power ramp. Setup described in my prior entries. Result: Gas programs all seemed to work. Pressure looks not too bad. Runaways early though. Killed by a large injection at 0.64s.
Dec 15 2010 09:18:45:620AM	1101215002	Jerry Hughes	Shot 2: Attempt: SL requests Ne puff reduction. Reducing PG1 pulse height from 0.4 to 0.6s to 50V. (Seg2) Also, increase PG3 back porch from 0 to 0.1s from 30 to 40V. Load at 15-Dec-2010 09:08:48.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Goes into rampdown, disrupts at 1.7s. Startup is better. No runaway problem. Mini-bounces at 0.04s? Flattop Bt is 5.50T, a little higher than on target shot.
Dec 15 2010 09:30:24:697AM	1101215003	Jerry Hughes	Shot 3. Attempt: Retry with tweaks: Change PG3 backporch between 0 and 0.1s from 40 to 35V. Change TF current program in Seg2 to 150kA to get 5.4T. Load at 15-Dec-2010 09:22:53.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Startup looks okay. Makes it to 1.75s. RF is cleaning up Neuts peak at 4e13 Strike point is on the floor during first half of flattop.
Dec 15 2010 09:45:58:760AM	1101215004	Jerry Hughes	Shot 4. Attempt: Move X-point and strike and increase elongation Change RXL in flattop from -0.015 to -0.007 Change ZXL in flattop from 0.005 to -0.015 Change ZCUR in flattop from -0.015 to -0.005 Load at 15-Dec-2010 09:37:57.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disrupts at 1.52s. Goes DN at 0.6s. Programming to RXL/ZXL seems to have worked. But I didn't raise ZXU. Boo.
Dec 15 2010 10:01:59:853AM	1101215005	Jerry Hughes	Shot 5: Attempt: Increase ZXU program to keep plasma LSN. Move ZXU in flattop from 0.007 to 0.027. Also, relax the RXU sweep that is present in this segment. **** Load at 15-Dec-2010 09:50:03.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.6s, startup okay. Multiple H-modes, not very EDA-like. J-port faults early and fails to recover. Strike point is still on the floor when RF turns on.
Dec 15 2010 10:09:26:903AM	1101215006	Jerry Hughes	Shot 6: Attempt: Retry with some tweaks to RXL,ZXL program before 0.6s. Also set RXL in flattop from -0.007 to -0.004. Load at 15-Dec-2010 10:04:12.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Starts up fine, goes to 1.5s. RF is improved over last shot. H-modes still don't seem very EDA-like.
Dec 15 2010 10:17:55:580AM	1101215007	Jerry Hughes	Shot 7: Attempt: Make this more solidly LSN. Set ZXU in flattop from 0.027 to 0.047. Set PG1 pulse from 0.4 to 0.6s from 50 to 65V, per SL's request. *** Load at 15-Dec-2010 10:17:02.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result:
Dec 15 2010 10:40:01:890AM	1101215008	Jerry Hughes	Shot 8. Attempt: Change nl04 demand from 8e19 to 9e19 by 0.5s. Also delay the turn-off in density feedback to provide a little failsafe in the event of H-L back-transitions: Also change ZCUR in flattop from -0.005 to -0.010. *** Load at 15-Dec-2010 10:30:23.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disruption, pre-flattop. Looks like a brick fell in around 0.2s.
Dec 15 2010 10:59:36:220AM	1101215009	Jerry Hughes	Shot 9 Attempt: Retry. Result: Ran to 1.44s. No bricks or bombs before flattop. Strike point falls on floor during the early H-modes. Looks like a fairly decent match in shape to 1050426022. Right gap is a little smaller. nebar prior to RF turn-on is 1.4e20 instaed of 1.9e20.
Dec 15 2010 11:03:35:360AM	1101215010	Jerry Hughes	Shot 10: Attempt: Raise current/density. Change Ip demand in seg 2 to -900000. Change flattop nl04 demand to 1.1e20 *** Load at 15-Dec-2010 10:55:40.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Runs to 1.44s. Mulitple H-modes
Dec 15 2010 11:16:21:357AM	1101215011	Jerry Hughes	Shot 11: Attempt: Reload shot 003 and raise current/density. Set Ip in flattop from -800000 to -900000 Set nl04 demand to 9e19 in flattop, and remove the hard feedback cutoff at 1.2s. *** Load at 15-Dec-2010 11:08:41.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.7s. Multiple H-modes Peak neut rate of 1.4e14 H98 hits 0.95--1.05. nl04 did not meet demand in the Ohmic phase.
Dec 15 2010 11:41:42:803AM	1101215012	Jerry Hughes	Shot 12. Attempt: Repeat with gas tweaks PG5 chop from 50V to 20V @[0.30,0.32]s nl04 flattop demand from 9e19 to 1e20 *** Load at 15-Dec-2010 11:21:22.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.75s Nice H-mode. Steady, with gradual density rise. Peak Wmhd at 197kJ. H98~1.1 Neuts hiting near 2e14
Dec 15 2010 11:41:33:350AM	1101215013	Jerry Hughes	Shot 13: Attempt. Repeat with more RF. No PO changes. Result: Plasma to 1.76 EDA H-mode, performance briefly spoiled by Mo inection. Wmhd touches 200kJ. Neuts peak at 2e14.
Dec 15 2010 01:03:48:603PM	1101215014	Jerry Hughes	Shot 14. Attempt: Increase current/density Change Ip demand from -900000 to -1000000 Change nl04 demand from 1e20 to 1.1e20 **** Load at 15-Dec-2010 11:47:34.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.72s Good EDA H-mode with Prf up to 4.5MW, Wmhd peaks at 207kJ. neuts hitting 2e14.
Dec 15 2010 12:08:49:440PM	1101215015	Jerry Hughes	Shot 15: Attempt: Repeat with tweak to seeding and RF. Also, the NINJAs will turn off their puff. Change PG1 pulse from 50 to 40V. *** Load at 15-Dec-2010 11:57:38.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.5s. EDA H-mode was of high quality up to the injection at 1.05s. Neuts peak above 2e14. Peak Wmhd=214kJ. H98 not quite 1.
Dec 15 2010 12:26:35:430PM	1101215016	Jerry Hughes	Shot 16: Attempt: Raise current/density Change Ip demand from -1.0e6 to -1.1e6 Also slowed down the Ip ramp-down rate from 1.5 to 1.9s Change nl04 demand from 1.1e20 to 1.2e20 *** Load at 15-Dec-2010 12:13:36.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Shot ran to 1.86s. Several transient H-modes. Wmhd peaks at about 205kJ.
Dec 15 2010 12:40:41:617PM	1101215017	Jerry Hughes	Shot 17: Attempt: Repeat with higher density. Changing nl04 demand in flattop from 1.2e20 to 1.3e20, and also having it get there at 0.45s, rather than 0.5s. Also raised the demand at 0.26s by 1e19. *** Load at 15-Dec-2010 12:30:06.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disruption at 0.21s. Brick.
Dec 15 2010 12:57:28:503PM	1101215018	Jerry Hughes	Shot 18: Attempt: Retry. Result: Fizzle. Base pressure was very high at breakdown: 0.16mtorr It looks like cryopump was partially cooled with He shortly after Shot 017, then rewarmed 3 minutes before Shot 18. Cryo outgassing is the explanation.
Dec 15 2010 01:08:38:447PM	1101215019	Jerry Hughes	Shot 19: Attempt: Retry. No changes. Result: Plasma to 1.84s. Lots of RF. 3 H-modes, kind of radiative.
Dec 15 2010 01:24:13:647PM	1101215020	Jerry Hughes	Shot 20: Attempt: Retry. SL requests a reduced fill pressure in B-side lower. No change to PG1 program in Seg 2. Net effect--> reduced Ne. Also, I will begin the Ip rampdown at 1.45s instead of 1.5s. Net ramp-down rate will decrease. **** Load at 15-Dec-2010 13:11:55.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle. Late breakdown. EF4 current is -1240 at t=0 (and maybe continuing to go negative) On shot 019 it was closer to -1260. Steve also felt that Bz looked high.
Dec 15 2010 01:38:26:810PM	1101215021	Jerry Hughes	Shot 21: Attempt: Retry with tweak to vertical field to get good breakdown. Change IC_EF4U from -1290 to -1300 in Seg 1. *** Load at 15-Dec-2010 13:27:02.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.86s. Again multiple H-modes, radiative. Peak neuts just over 1.5e14. H98~0.9 at that time
Dec 15 2010 01:56:20:213PM	1101215022	Jerry Hughes	Shot 22. Attempt: Repeat with more Ne. PG1 pulse from 40 to 70V. *** Load at 15-Dec-2010 13:34:35.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.86s Multiple H-modes, too radiative. There was a lot of Ne on this one.
Dec 15 2010 02:11:37:243PM	1101215023	Jerry Hughes	Shot 23. Attempt: Repeat 022, but with a N2 instead of a Ne puff. Place 15psi of N2 in B-side-lower. Set PG1 flat at 100V from 0.5 to 1.4s. *** Load at 15-Dec-2010 14:02:05.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.94s Many transient H-modes. I'm guessing there was plenty of N2 injected.
Dec 15 2010 02:25:46:407PM	1101215024	Jerry Hughes	Shot 24. Attempt: Retry with different N2 input. Pressure in B-side-lower raised to 19.8psi. Changed PG1 from 100 to 60V. **** Load at 15-Dec-2010 14:14:34.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.75s H-modes are improved. First one peaks at 214kJ. H98~0.9 at that time.
Dec 15 2010 02:36:01:287PM	1101215025	Jerry Hughes	Shot 25: Attempt: Repeat with more RF, less N2 puff. PG1 reduced from 60 to 40V. Result: Plasma to 1.94s. H-modes are not very pretty. There is one short phase with decent performance. Peak Wmhd=216kJ.
Dec 15 2010 02:48:17:430PM	1101215026	Jerry Hughes	Shot 26. Attempt: Repeat with more N2. Also try to keep the strike point from hopping up onto the divertor plate. PG1 from 40 to 70V Change RXL to reach -0.020 at 0.663s, and decrease to -0.025 by 1.5s *** Load at 15-Dec-2010 14:43:08.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.95s Multiple H-modes.
Dec 15 2010 03:10:01:157PM	1101215027	Jerry Hughes	Shot 27: This should be the last shot of today. Catherine just informs us Matt has broken the single-day neutron record again! Attempt: Load from shot 012 Set PG1 to 60V from 0.5 to 1.4s. (N2 puffing now instead of Ne) Also repeat the tweak to IC_EF4U upper in Seg 1 that I had to do on shot 21. Changed from -1290 to -1300. **** Load at 15-Dec-2010 14:55:22.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.97s Nice comparison shot to 12. 2 EDA phases with decent performance.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:57:02:203AM	Plasma	Ok
2	09:09:22:390AM	Plasma	Ok
3	09:23:39:873AM	Plasma	Ok
4	09:38:36:620AM	Plasma	Ok
5	09:51:04:563AM	Plasma	Ok
6	10:04:44:600AM	Plasma	Ok
7	10:17:55:677AM	Plasma	Ok
8	10:30:50:500AM	Plasma	Ok
9	10:41:46:177AM	Plasma	Ok
10	10:56:16:940AM	Plasma	Ok
11	11:09:39:860AM	Plasma	Ok
12	11:23:50:080AM	Plasma	Ok
13	11:37:08:947AM	Plasma	Ok
14	11:50:23:870AM	Plasma	Ok
15	12:04:00:687PM	Plasma	Ok
16	12:20:13:220PM	Plasma	Ok
17	12:35:31:440PM	Plasma	Ok
18	12:47:58:650PM	Plasma	Ok
19	01:00:43:177PM	Plasma	Ok
20	01:15:10:637PM	Plasma	Ok
21	01:28:06:853PM	Plasma	Ok
22	01:41:24:343PM	Plasma	Ok
23	02:04:49:357PM	Plasma	Ok
24	02:17:25:590PM	Plasma	Ok
25	02:30:07:260PM	Plasma	Ok
26	02:43:58:840PM	Plasma	Ok
27	02:56:58:163PM	Test	Bad

System Availability

Dec 15 2010 08:56:45:203AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes BES system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (D+F) working. All midplane and off-midplane diode arrays working except WB1AX. Midplane foils calibrated and PRAD_MAIN is being filled. Divertor/Ledge foils not yet ready. Jul 15 2010 08:27AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Nov 16 2010 02:36PM (dekow) Jim Irby Boronization dekow,irby CNPA yes Multiple channel CNPA available Oct 21 2010 07:11PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Shut down. Helium dewar removed. LN2 manual valve and solenoid valves are closed and tagged. Apr 06 2010 10:51AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes Wide-view CXRS system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes system is aligned; new calibrations (relative brightness and position) not yet implemented Jun 29 2010 10:27AM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation yes operational, but turned off Nov 03 2009 04:59PM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 06 2007 10:50AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 06 2007 10:51AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DNB no in test mode only Nov 03 2009 05:01PM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung ECDC yes Operational Jun 26 2010 09:28PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes All channels working and calibrated. Oct 27 2010 03:41PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauges are operational. Jun 28 2010 08:02PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no Plugs for Power Supply and Controls have been unplugged and red tagged making system safe for In-Vessel Access. Apr 05 2010 11:18AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes operating normally Jun 29 2010 10:26AM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Jun 26 2010 11:19PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36PM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes System installed and aligned. Inverted profiles 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. Dec 13 2010 05:29PM (ntsujii) Miklos Porkolab Phase Contrast Imaging 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 As of 1101123, the 60, 88u, 88l, 140 and variable set at 115GHz are operational. The 50, 75 and 112 are nonoperational. On 1101123, the noise band at ~200kHz is again seen on the 88u and 88l channels. Nov 23 2010 09:30AM (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