Miniproposals

Miniproposal: 564 Date Filed: 7/30/2009 Title: Power requirements for high confinement H-modes and the role of radiated power spatial distribution First Author: Alberto Loarte Session Leader: Jerry Hughes (shots 1-28) Session Leader: Jerry Hughes (shots 36-36)

Miniproposal: 578 Date Filed: 9/3/2009 Title: Experimental tests of EPED1 pedestal prediction in ELMy H-Mode First Author: Phil Snyder Session Leader: Jerry Hughes (shots 29-36)

Engineering Operator Run Comment

1) MP564

Session Leader Plans

Entered: Nov 30 2010 09:09:51:017AM

Author: Jerry Hughes

Run plan for 1101130 1) MP564 2) MP578 SL: J. Hughes Note: Special gas setup fill B-side lower with 20psi N2 Hybrid DISABLED (PG1) ** Please purge B-side lower 3 times to ensure Ar is all out ** fill H-Bottom with 1 psi Ar Hybrid DISABLED (PG5) fill NINJA with 10 psi D2 DISABLED Overnight boronization and morning ECDC in He using recipe preceding run 1101117. ICRF required, all transmitters in heating phasing. Nothing fancy. DNB requested. Cryopump not requested. First shot: Load from 1101117019. This is a 900kA 5.4T in the JFT-2M shape. Reduce flattop current to 800kA. Set up PG1 and PG5 to be under chopper control. Enable B-side lower and set PG1 to 100V (full on) from 0.5 to 1.4s. Leave H-bottom disabled until requested. Part 1. (MP564) Begin assessing N2 seeding compatibility with ELMy H-mode. Apply ICRF power ramps from 3 to 5MW. Reduce N2 feed as needed to obtain good H-modes/reduced density. Monitor pedestal and H-mode characteristics, ELM type. Optimize N2 puff and RF program for high confinement and determine if target is compatible with ELMs. Part 2. (MP578) If N2 seeding is found to be useful in part 1., continue to seed, adjusting PG1 program as needed. Otherwise just turn it off. (A) Raise Ip to 900kA to recover the base case of 1101117019. Adjust RF power demand and/or target density as needed to optimize pedestal/ELMs. (B) While keeping lower X-point fixed, increase elongation so that the crown of the plasma rises. On 1101117, this was done by raising ZCUR alone. Today we should try some combination of ZCUR and ZXU adjustment to accomplish this. Keep inner and outer gaps fixed. Attempt to achieve kappa of 1.6 or greater. Adjust RF power demand and/or target density as needed to optimize pedestal/ELMs. (C) Return to base case from (B) and _reduce_ elongation. Adjust RF power demand and/or target density as needed to optimize pedestal/ELMs. (D) Return to a suitable test case from (A--C) and scan RXL shot-to shot. Adjust RF power demand and/or target density as needed to optimize pedestal/ELMs.

Physics Operators Plans

Entered: Nov 29 2010 03:29:44:313PM

Author: Bill Rowan

PO Plan and Engineering Setup for Tuesday, November 30, 2010, Run 1101130 MP MP564 - Power requirements for high confinement H-modes and the role of radiated power spatial distribution SL: Hughes MP578 - Experimental tests of EPED1 pedestal prediction in ELMy H-Mode SL: Hughes PO: Rowan Changeover time between the two MPs is not in the calendar. PO will note in the log when it happens. ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1101117019 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 20 psi N2 Hybrid DISABLED (PG1) ** Please purge B-side lower 3 times to ensure Ar is all out ** leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill H-Bottom with 1 psi Ar Hybrid DISABLED (PG5) fill NINJA with 10 psi D2 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): yes, follow prescription below Overnight ECDC (yes/no): use post boronization prescription below ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): yes Also require for MP 564: CXRS, IR camera for MP 578: PCI, GPI Vessel temperature: 35/35/35 ------------------------------ Post Boronization ECDC Parameters (agreed by Pfeiffer and Hughes) ------------------------------ * Note: using He only * ---------------------- 1st Gas Setup Gas: He sweep: 44/45/103 cm scan: 20/120 s Pressure: 5e-5 Torr Duration: 3 hrs ------------------------------ Boronization Parameters (agreed by Pfeiffer and Hughes) ------------------------------ dP=120 psi ** optimized sweep parameters ** rmin/rdwell/rmax: 44/75/80 cm tdwell/tsweep: 60/120 s Zero EF4 current Pulser 0.7 on 0.3 off

Session Leader Summaries

Entered: Nov 30 2010 05:40:56:513PM

Author: Jerry Hughes

Today was a fairly enjoyable run in which we exploited N2 seeding in the JFT-2M shape. As was the case in our prior experience, boronization recovery with ICRF was quite rapid using heavy seeding. For the purposes of recovery, our initial H-mode targets were EDA H-modes with modest density. These exhibited quite good performance and stationary operation, with the finest example being shot 014. At a series of target densities, we worked to optimize the N2 puffing rate, and ultimately accessed some seeded ELMy H-mode conditions later in the run (019, 025--28, 31). Starting with shot 026 we switched from MP564 to MP578 and began to try to make shape changes as we had on 1101117. It was challenging getting the elongation extension while still maintaining the correct X-point position, just as it had been on the prior run. In the end we did not make much progress extending the ELMy data set at kappa>1.5. But we can potentially use the seeded shots from MP564 for EPED studies. It should be said that there were parts of the run that were confusing, and sometimes just plain ugly. See detailed logbook entries for details.

Physics Operator Summaries

Entered: Dec 1 2010 08:18:19:627AM

Author: Bill Rowan

The configuration for the this run was the JFT-2M shape. In the first part of the experiment, it was shown that an ELMY H-mode could be achieved with nitrogen seeding. In a second part, the elongation of the shape was increased from the basic discharge although the elongation was not higher than obtained in the past. The vacuum vessel was boronized prior to this run. The post boronization helium ECDC was completed successfully. I was informed that the helium pressure was changed during the procedure to maintain the plasma. So, beware propagating the prescription for post boronization ECDC listed in the run plan. The first two shots were no power shots for gas valve exercising. In the first shot, PG3 seemed not to provide the expected pressure increase. A second no power shot was taken with increased demand to aid in exercising the valve. The reference shot for the discharge was 1101117019. For segment 1, the most recent non-cryo discharge was selected. That was segment 1 from 1101123015. Interestingly, this can be traced back to run 1101117 essentially without changes. The only segment 1 change required during this run was to increase PG3 to avoid runaway shutdowns. In the first part of the experiment, N2 injection and density demand was varied to produce a seeded ELMY H-mode. As expected, the density programming was only effective until ICRF was turned on. There were some problems with early disruptions due to impurity injections. Later in the run, there were some dramatic density droops possibly due to impurity injection. To counter these, a step was added in the density programming to keep the plasma near the H-mode level even during these droops. The attempt to increase the elongation was limited to just a few shots. It was found that the elongation could be increased for 1.5 to 1.6 using a step change in zcur. Earlier, attempts to effect the change by modifying the position of the upper x-point were not successful. This is a weak tool compared to modifications in rcur. Score card 2 no power shots for gas valve test 2 runaway shut downs 32 plasmas ------------ 36 total

Session Leader Comments
Nov 30 2010 09:02:37:617AM	1101130001	Jerry Hughes	Gas test
Nov 30 2010 09:02:41:670AM	1101130002	Jerry Hughes	Gas test
Nov 30 2010 09:11:28:753AM	1101130003	Jerry Hughes	Shot 3: Attempt: JFT-2M shape, with heavy N2 puffing. Result: Shot ran, full length. Shape overlays with 1101117019. Ip=800kA. Bt=5.4T No N2. B-side lower wasn't enabled. RF is coming up already. H-mode power threshold fairly low. Long EDA H-mode. L-mode density is too high, naturally.
Nov 30 2010 09:25:16:163AM	1101130004	Jerry Hughes	Shot 4: Result: Got the N2 that time, and plenty. E and J-port performeance is pretty good. nebar goes to >2e20. Steady drop in edge Te. No H-mode.
Nov 30 2010 09:59:24:807AM	1101130005	Jerry Hughes	Shot 5: Attempt: reduced N2, improved RF. Result: L-mode nl04 gets up to 8e19 during RF. Initially there is a set of ELM-free H-modes, followed late by a steady H-mode with nebar of ~3e20. In late phase, Pin~2--4MW Prad,core~1.7MW H98~0.8 Lots of magnetics fluctuations in the 50--150kHz range during the last H-mode. Matt notes that the edge Te takes a dive before RF turns on. For next shot, delay onset of N2 puffing by 50ms. No TS data. There is a delay to get G-top gate valve unstuck.
Nov 30 2010 10:11:43:850AM	1101130006	Jerry Hughes	Shot 6: Attempt: Delay onset of N2 puff. Keep trying to improve RF. Result: Full length shot with long H-mode. Much data not coming in. Ah there they are. Looks like an EDA H-mode with substantial edge Te, at least through 1s. Ptot gets to 3.8MW in this phase, Prad,main~1.7MW. H98~1 Next: Try for improved RF.
Nov 30 2010 10:25:27:667AM	1101130007	Jerry Hughes	Shot 7: Attempt: RF demand is a 3--5MW ramp. N2 still at 90% chop. Result: Another long H-mode. Better performance early, followed by degradation. At 0.88s, Ptot=3.7MW, H98~1.05. Te,ped is a few hundred eV. Continued signs of magnetics fluctuations, broad in f-space, increasing in the poorer confinement phase. Next: Try for a cleaner RF ramp.
Nov 30 2010 10:34:36:230AM	1101130008	Jerry Hughes	Shot 8: Result: A good EDA-like H-mode, until we lose J-port at 1.34s. H98 stays above 1 the whole H-mode. Ptot touches 4.8MW. Prad,main~2.3MW.
Nov 30 2010 10:45:35:447AM	1101130009	Jerry Hughes	Shot 9: Early disruption. When pressed, PO says "It will be challenging for you to get anything out of this shot."
Nov 30 2010 11:04:48:080AM	1101130010	Jerry Hughes	Shot 10. Retry following disruption. Result: Ohmic density is lower than on shot 008. nl04 is 6e19 instead of 7e19, and the nebar at the L-H transition is slightly lower too. H-modes are transiently high-performing Next shot: Raise programmed target density to try to match shot 008.
Nov 30 2010 11:11:24:250AM	1101130011	Jerry Hughes	Shot 11: Attempt: retry of shot 008 conditions. Result: Not the long steady H-mode I was hoping for, although there are periods of good performance, 1.25--1.38s for example. Ptot>5MW Prad,main~2.7MW. Next: Scan nl04 up another notch.
Nov 30 2010 11:28:46:597AM	1101130012	Jerry Hughes	Shot 12: Result: Got the increase in nl04. Impurity radiation continues up. Rf trace is much cleaner, and Ptot ramps up to 5MW without faults. Unfortunately the H-modes radiatively collapse. Next: back off N2 puff. Go to 70% chop.
Nov 30 2010 11:42:39:427AM	1101130013	Jerry Hughes	Shot 13: Repeat with N2 chop reduced from 90 to 70%. Result: Long H-mode, spoiled briefly by an injection at 0.88s, and then some later, after 1.2s. Peak H98~1.2 Except for the injections, Prad,main is reasonably low. So reducing the puff worked to get confinement up.
Nov 30 2010 11:50:48:727AM	1101130014	Jerry Hughes	Shot 14: Attempt: Lower N2 chop from 70% to 50%. Result: Steady H-mode. H98~1.1 throughout. Pedestal is up to several hundred eV. Ptot hits 5.2MW. Prad,main~1.4MW
Nov 30 2010 12:12:44:920PM	1101130015	Jerry Hughes	Shot 15: Attempt: Dropped starting density, Result: This drops the initial pedestal density. Steady ne and Prad rise after that, until injection at 1.25s ruins all. Matt says the Prad rise is due to intrinsic impurity buildup, not N2. Next: Drop the nl04 a little further.
Nov 30 2010 12:15:02:107PM	1101130016	Jerry Hughes	Shot 16: We'll just pretend this shot never existed.
Nov 30 2010 12:35:04:563PM	1101130017	Jerry Hughes	Shot 17. Attempt: nl04 demand is 5e19. N2 chop is 50% Result: Got lower initial nl04. H98 is 1.2 transiently, but Prad steadily increases. Some small event at 0.89 seems to knock out D and E, and after that the discharge quickly dies. Mo is the culprit, not N. Next we will boost the N2 chop to 70%.
Nov 30 2010 12:55:03:930PM	1101130018	Jerry Hughes	Shot 18: Early disruption, pre-N2
Nov 30 2010 01:02:32:647PM	1101130019	Jerry Hughes	Shot 19: Attempt: nl04 demand is 5e19. N2 chop is 70% Result: H-modes, with some ELMs. The first big one is at 0.86s, and it knocks out D and E, apparently. There are more between 0.9 and 1s, and the density starts to get under control. Substantial Te drops in the rapid ELMs between 1 and 1.4s. H98~1.1 for most of the shot. Prad,main~1.4MW in the steady phase. Nice shot.
Nov 30 2010 01:07:21:053PM	1101130020	Jerry Hughes	Shot 20: Runaways. Shut down early.
Nov 30 2010 01:29:34:947PM	1101130021	Jerry Hughes	Shot 21: Result: This is a mess. After 1s things are just lousy because of Mo radiation. Between 0.85 and 1.0s, it seems to be in an I-mode like state. 0.75 to 0.8s is an ELMy H-mode, apparently wrecked by an injection. Still, not bad for a shot that looked doomed from runaways to begin with.
Nov 30 2010 01:43:41:343PM	1101130022	Jerry Hughes	Shot 22: Attempt: Repeat, with some fixes to the startup Result: Looks painfully similar to shot 21. We are heating up the K limiter. There are big Mo influxes. It is not looking good for continued high performance. Next: Retrace our steps. First back down the N2 chop to 70% to reproduce the demand on shot 019, and if that doesn't help anything, begin raising nl04.
Nov 30 2010 01:57:47:190PM	1101130023	Jerry Hughes	Shot 23. Attempt: nl04 demand is 5e19. N2 chop is 70% Result: Bad Prad after 1s again. Same bat time, same bat channel. Some ELMs early, but rapid degeneration to an I-mode like condition between 0.9 and 1s.
Nov 30 2010 02:10:19:300PM	1101130024	Jerry Hughes	Shot 24: Attempt: Raise nl04 demand by 1e19. Result: Looks slightly better. The huge influx of Mo is delayed, at least. 4 pretty convincing ELMs betwen 0.76 and 0.82s, and another I-mode like phase out to 1.08s. Next: Lower N2 chop to 50%. This will put us approximately at the target conditions of shot 15. Also, Matt has a good idea to raise the nl04 after the nominal H-mode time, so that we can fuel the weird low-density phases which seem to be leading to big Mo problems.
Nov 30 2010 02:23:37:087PM	1101130025	Jerry Hughes	Shot 25: Attempt: Reduce N2 chop to 50%. Result: Much improved! H-mode density is low, and there are many ELMs. D2 is puffing in the later stages as the H-mode density drops. Maybe this helps with the sustainment? Next: Repeat.
Nov 30 2010 02:31:47:553PM	1101130026	Jerry Hughes	Shot 26. Attempt: Repeat of 025. Result: Very similar. PG3 still supplying D2 during the ELMy H-mode phase. Next: Lower N2 to 40% chop.
Nov 30 2010 02:49:57:883PM	1101130027	Jerry Hughes	Shot 27: Attempt: Repeat with N2 chopped at 40% instead of 50%. Result: First H-mode stays ELM-free longer.
Nov 30 2010 03:02:06:950PM	1101130028	Jerry Hughes	Shot 28. Attempt: Put an intentional notch into the RF at 0.8s. The idea being to promote a back-transition early, from which the plasma could recover into a steady ELMy H-mode sooner. Result: Some nice ELMing data after 1s. Radiation is still under control. This actually isn't that bad a target to start from with respect to MP578, so why don't we go there. Next shot: Perform an elongation increase
Nov 30 2010 03:21:21:763PM	1101130029	Jerry Hughes	Shot 29: Attempt: Try some MP578. Take N2 seeded ELMy H-mode from 028 and ramp ZXU down during flattop. Result: Very interesting. This shot looked identical to 028 up until 0.97s. Same power, edge Te, nebar, Prad. But 028 ELMed then, and this one didn't. The only thing that was changed was that PO put in a large ZXU ramp during the duration of flattop. Now, this ZXU ramp had essentially no effect on the plasma shape, so if it is responsible for ELM stabilization, then the cause is subtler. Next: Have Bill stop the ZXU ramp at 1.1s. Put in a ZCUR increase at 1.3s.
Nov 30 2010 03:24:21:820PM	1101130029	Jerry Hughes	Shots 25--29 all show QCM activity on BP4T_ABK
Nov 30 2010 03:34:07:920PM	1101130030	Jerry Hughes	Shot 30. Result: ELMs did not come back. What was the trigger on shot 28? Next: PO will remove the ZXU ramp altogether. ZCUR ramp will still be there at 1.3s. That actually does work to raise the elongation.
Nov 30 2010 04:06:41:450PM	1101130031	Jerry Hughes	Shot 31. ELMs came back. At lower power however. Next: Raise elongation throughout flattop. Get whatever RF power is available. Long power room access to fix J-port.
Nov 30 2010 04:19:04:227PM	1101130032	Jerry Hughes	Shot 32: Attempt: Raise crown of plasma with a ZCUR increase. Result: Got the plasma to go up, but lower X-point also rose. Next: PO will compensate for ZXL,RXL shift.
Nov 30 2010 04:36:03:093PM	1101130033	Jerry Hughes	Shot 33: Change to RXL, ZXL went the wrong way and we trashed an inner divertor probe. Disrupts at 0.78s
Nov 30 2010 04:45:38:270PM	1101130034	Jerry Hughes	Shot 34: Attempt: Try to get correct X-point positioning Result: Better, though ZXL is still a bit high. EDA with increasing radiation. Next: More ZXL compensation, and decrease nl04 in the L-mode phase by 1e19.
Nov 30 2010 05:00:03:257PM	1101130035	Jerry Hughes	Shot 35 Result: ELM-free H-modes. Not having a lot of luck getting ELMs here. Let's go back and run shot 014, and see if all the crap we've done to the machine can be ignored.
Nov 30 2010 05:03:55:907PM	1101130036	Jerry Hughes	Shot 36: Attempt to reload shot 14. Result: Runaways and shutdown. EOR.

Physics Operator Comments
Nov 30 2010 07:44:23:170AM		Bill Rowan	Boronization ran as expected. There were some problems with the post boronization ECDC. Probably pressure of He. Noted in the log.
Nov 30 2010 08:18:08:477AM		Bill Rowan	Load from 1101117019 set PG5 (Ar): 50 ms pulse starting at 0.2 s. 50 V amplitude copied from 1100903 dpcs_piezo_chopper on checked chopper outputs: "pulse_gas3","h-bot","pulse_gas1" dpcs_fizzle on dpcs_xjump on Load segment 1 from 1101123015 Most recent run with no cryo. On that run, there were no changes in startup from load of segment 1 from 1101117001 on shot 1101123001. So this is the same startup as used on 1101117.
Nov 30 2010 08:27:34:070AM		Bill Rowan	Mods to shot requested by SL reduce ip from 0.9 MA to 0.8 MA PG1 and PG5 (h-bot) are still set to chopper chopper control from reference shot setup set PG1 (N2) to 100 from 0.5 s to 1.4 s Load PCS
Nov 30 2010 08:57:25:523AM	1101130001	Bill Rowan	001. No power shot. this is a gas test intended to exercise gas valves Result not much gas from PG3
Nov 30 2010 08:57:09:057AM	1101130002	Bill Rowan	002. increased PG3. maybe this will help with the exercise Result Okay. Will go ahead with run
Nov 30 2010 09:09:48:760AM	1101130003	Bill Rowan	003. Changed PG3 and PG4 to settings for run and as on the shots that were loaded Delay in this shot for TS Result 0.8 MA No PG1.
Nov 30 2010 09:20:30:407AM	1101130004	Bill Rowan	004. Enabled b-side lower, PG1, N2 Result Disruption at 1.32 s
Nov 30 2010 09:33:29:903AM	1101130005	Bill Rowan	005. Power room access before this shot. Trouble shoot EF2 Cell access for DNB before this shot to increase gas Reduce PG1 (N2) demand from 100 to 90 G-top GV (TS) will not open and will require attention
Nov 30 2010 09:42:47:963AM	1101130005	Bill Rowan	Result Plasma full length and through ramp down RF modulation due to J
Nov 30 2010 10:01:38:877AM	1101130006	Bill Rowan	006. reduced the PG1 (N2) pulse length now starts at .55 and ends at 1.4 cell access to look at G-top GV -- temporarily repaired Result Plasma full length
Nov 30 2010 10:14:34:447AM	1101130007	Bill Rowan	007. No changes for this shot. Result Plasma full length.
Nov 30 2010 10:30:27:050AM	1101130008	Bill Rowan	008. No PCS changes for this shot Result Disruption at 1.41 s RF turned off at 1.35 s
Nov 30 2010 10:45:51:910AM	1101130009	Bill Rowan	009. No PCS changes Result Disruption at 0.23 s Does not appear to be an runaway shutdown.
Nov 30 2010 11:02:13:423AM	1101130010	Bill Rowan	010. No PCS changes DNB off for this shot Result Disruption at 1.3 s
Nov 30 2010 11:09:06:213AM	1101130011	Bill Rowan	011 increase the demand nl_04 to 0.6 Result Plasma full length, disruption during ramp down
Nov 30 2010 11:26:47:103AM	1101130012	Bill Rowan	012. Slight increase in PG3 for early runaways Increase nl_04 to 0.7 Result Disruption at 1.5 s There is a notch in the current at 0.64
Nov 30 2010 11:36:02:347AM	1101130013	Bill Rowan	013. Reduce PG1 (N2) from 90 to 70 Result Plasma full length There is a notch in the current at 0.64. Gain switch on ip at this time.
Nov 30 2010 11:47:12:840AM	1101130014	Bill Rowan	014. Reduce PG1 (N2) from 70 to 50 Result Plasma full length
Nov 30 2010 12:02:49:663PM	1101130015	Bill Rowan	015. Reduce nl_04 demand from 0.7 to 0.6 Result Plasma full length nl_04 did drop before the icrf turned on
Nov 30 2010 12:16:08:210PM	1101130016	Bill Rowan	016. Reduce nl_04 demand from 0.6 to 0.5 Result Disruption at 0.12s maybe a little later before it died Looks as though something dropped in. Not a runaway shutdown.
Nov 30 2010 12:36:16:520PM	1101130017	Bill Rowan	017. No PCS changes. Assuming that the last shot disrupted due to an injection. Result Disruption at 0.9 s nl_04 reduced
Nov 30 2010 12:45:47:820PM	1101130018	Bill Rowan	018. Increased PG1 (N2) from 50 to 70 Result Disruption at 0.35 s Probably something dropped in.
Nov 30 2010 12:52:59:557PM	1101130019	Bill Rowan	019. No PCS changes Result Plasma full length and through most of ramp down
Nov 30 2010 01:11:26:320PM	1101130020	Bill Rowan	020. Increased PG1 (N2) from 70 to 80 Result DPCS_XJUMP caused soft abort
Nov 30 2010 01:25:08:377PM	1101130021	Bill Rowan	021. Increased PG3 back porch Increased prefill to 27 ms from 25 ms Result Plasma full length Unusual density time series
Nov 30 2010 01:32:26:463PM	1101130022	Bill Rowan	022. increased pg3 peak. left back porch the same Result Disruption at 1.1s Runaways seem to be lower
Nov 30 2010 01:45:58:433PM	1101130023	Bill Rowan	023. Decreased PG1 (N2) from 80 to 70 Result Plasma full length
Nov 30 2010 01:58:00:480PM	1101130024	Bill Rowan	024. Increased nl_04 demand from 0.5 to 0.6 Result Disruption at 1.3 s
Nov 30 2010 02:09:35:073PM	1101130025	Bill Rowan	025. Reduced PG1 (N2) to 50 added a step density increase at 0.9 s to 1.0e+20
Nov 30 2010 02:26:13:520PM	1101130026	Bill Rowan	026. No PCS changes Result Plasma full length
Nov 30 2010 04:00:28:917PM	1101130027	Bill Rowan	027 Reduced PG1 (N2) to 40 Result Plasma full length
Nov 30 2010 02:46:56:790PM	1101130028	Bill Rowan	028. No PCS changes
Nov 30 2010 03:25:11:367PM	1101130029	Bill Rowan	029. ZXU ramped from 0.08 at 0.45 s to 0.02 at 1.54 s Attempt to find a value of ZXU which will produce a desired elengation Result Plasma full length Not much effect on elongation
Nov 30 2010 03:33:03:367PM	1101130030	Bill Rowan	030. ZXU ramp is now stopped at 1.1 s at 1.3 s increase zcur by 1.5 cm to -0.005 Result Plasma full length elongation changed in response to zcur
Nov 30 2010 03:49:55:130PM	1101130031	Bill Rowan	031. reloaded shot 028 to remove the zxu ramp at 1.3 s increase zcur by 1.5 cm to -0.005 the net effect is to reproduce shot 030 without the zxu ramp Result Plasma full length
Nov 30 2010 04:18:44:653PM	1101130032	Bill Rowan	032. extended zcur -0.005 for the entire flat top Result Plasma full length elongation approx constant and at 1.5
Nov 30 2010 04:25:37:340PM	1101130032	Bill Rowan	compensated zxl for the change in zcur Result Disruption at 0.8 s PO made an error in correction of zxl
Nov 30 2010 04:40:21:007PM	1101130034	Bill Rowan	034 reloaded 032 compensated rxl and zxl for the change in zcur
Nov 30 2010 04:45:50:343PM	1101130035	Bill Rowan	035. zxl change to come closer to 028 lower the initial part of nl_04 to 0.5
Nov 30 2010 04:55:06:873PM	1101130036	Bill Rowan	036. reloaded 014
Nov 30 2010 05:03:59:940PM	1101130036	Bill Rowan	036. reloaded 014 Disruption. runaway shutdown

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:43:05:583AM	Test	Ok	Gas Test
2	08:51:32:413AM	Test	Ok	Gas Test
3	09:02:49:583AM	Plasma	Ok
4	09:16:28:813AM	Plasma	Ok
5	09:32:55:633AM	Plasma	Ok
6	09:57:57:013AM	Plasma	Ok
7	10:11:45:130AM	Plasma	Ok
8	10:24:56:330AM	Plasma	Ok
9	10:38:24:427AM	Plasma	Ok
10	10:50:53:267AM	Plasma	Ok
11	11:03:45:683AM	Plasma	Ok
12	11:16:53:217AM	Plasma	Ok
13	11:30:08:190AM	Plasma	Ok
14	11:42:50:207AM	Plasma	Ok
15	11:57:46:060AM	Plasma	Ok
16	12:11:21:977PM	Plasma	Ok
17	12:24:12:050PM	Plasma	Ok
18	12:36:52:173PM	Plasma	Ok
19	12:49:44:830PM	Plasma	Ok
20	01:03:52:577PM	Plasma	Ok
21	01:16:30:230PM	Plasma	Ok
22	01:29:04:477PM	Plasma	Ok
23	01:42:26:557PM	Plasma	Ok
24	01:54:50:887PM	Plasma	Ok
25	02:10:13:217PM	Plasma	Ok
26	02:22:45:843PM	Plasma	Ok
27	02:36:26:793PM	Plasma	Ok
28	02:50:24:283PM	Plasma	Ok
29	03:04:09:673PM	Plasma	Ok
30	03:22:20:517PM	Plasma	Ok
31	03:38:30:130PM	Plasma	Ok
32	04:08:15:730PM	Plasma	Ok
33	04:20:58:980PM	Plasma	Ok
34	04:35:20:630PM	Plasma	Ok
35	04:48:34:960PM	Plasma	Ok
36	05:01:12:330PM	Plasma	Ok

System Availability

Nov 30 2010 08:42:47:990AM

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 no Down due to broken laser shutter. Nov 22 2010 10:44AM (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 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