Miniproposals

Miniproposal: 648 Date Filed: 1/27/2011 Title: Direct boron density asymmetry measurements First Author: Mike Churchill Session Leader: Mike Churchill (shots 1-16)

Miniproposal: 719 Date Filed: 7/21/2012 Title: Shoelace antenna operation in EDA H-mode plasmas. First Author: Theodore Golfinopoulos Session Leader: Theodore Golfinopoulos (shots 17-32)

Engineering Operator Run Comment

MP 712 "Density range and dependence of I-mode in Rev Bt LSN plasmas" Se

Session Leader Plans

Entered: Aug 30 2012 01:53:52:147PM

Author: Amanda Hubbard

Run Plan for 1120831 MP 712 "Density range and dependence of I-mode in Rev Bt LSN plasmas" Session Leader: Amanda Hubbard Physics Operator: Syun'ichi Shiraiwa This run will continue the run from 1120829, which made good progress but was limited in power (to about 3.7 MW) due to lack of E-port ICRF. NOTE RUN IS CONTINGENT ON E-PORT TRANSMITTER REPAIR. IF IT DOES NOT WORK, WILL SWITCH TO ANOTHER MP, TBD (by Bob). Before run, do 2 hours Helium ECDC, no boronization. Cryopump is desired. Gas setup as on 1120829. 1. Complete high power part of Part A, scan to low densities. Start with repeat of 1120829015, a nice I-mode with moderately low density. But, increase ICRF power to max available. Will we get an I-H transition? Scan density shot to shot, starting with lower densities. Shorten pulse and use Neon as needed to avoid overheating Mo. Either reach I-H transitions or, more likely, establish lower bound. LHCD may wish to try coupling some power to the I-mode phase of some of these discharges. 2. MP Part B: Scan target density to higher values, document L-I and I-H thresholds. Start with nebar 1.5e20 m-3 (as on 1120829012). Step ICRF power, determine L-I and I-H tresholds. Then increase density shot to shot. Based on prior experience we expect the power window to get rather narrow at higher densities. Determine max ne at which we get a clear I-mode, as opposed to direct L-H transition. 3. Part C: Fuel density DURING a hot I-mode. Return to one of the moderate density I-modes from Part 1 (nebar ~ 1.2-1.3), with high ICRF. Program density to rise, and/or puff with NINJAs, AFTER I-mode is established. Goal is to see if we can increase I-mode density above the usual upper limit found eg in Part 2. This is likely to take a number of discharges to optimize. 4. Part D; Ip scan, performance optimization. Time permitting, which is as usual unlikely, we will take some of the most interesting cases from the earlier shots, and vary current. Up to 1.3 MA for maximum performance. And down as low as 0.9 MA to establish a hot target for future LHCD scenarios. Again, LHCD may wish to try coupling into later phases of hot I-modes.

Entered: Aug 31 2012 09:01:52:580AM

Author: Mike Churchill

Substituting for Amanda, as E antenna isn't working Today's run will be repeat I-mode shots, with an L-gap scan to optimize HFS CXRS coverage. Scan from 1.1MA-1.3MA Start with 1120829015. Possibly target lower Ip plasmas later, or ELMy I-modes seen on Catherine's day (1120830009)

Entered: Aug 31 2012 01:45:02:883PM

Author: Theodore Golfinopoulos

MP719 Goals: 0. Density calibration (Thomson, ECE) 1. Establish ohmic EDA H-mode in upper single null from 1070725009; improve match to antenna, minimize gap 2. Finish up portions of MP719 that were not covered 3. Get GPI shot Reference Shots: 1070725009 - upper single null, better match to antenna geometry. (Also 1070720009 - upper single null with ohmic EDA H-mode (thanks to Matt Reinke for finding this)) (for q95 targets, see 1120814021, 1120814019) Ip: ~900 kA Bt: for most shots, Bt is between 4 and 5 T. Need Cryo pump No ICRF No DNB No LH (since it's unavailable) Diagnostics: Required: Mirnov coils, PCI, polarimeter, differential TCI, reflectometer, Edge Thomson, GPI. Desired: edge reflectometer Outline: Take over ~1:00 PM 0. Thomson calibration 1. Repeat Part 1 of MP719 for new reference shot, 1070725009. a. Bring back shot, but change to low-field startup as on 1120814021. Field: 3.5 T during startup, leave at 3.5 T during flattop. This should produce q95 around 2.9 - good for Shoelace antenna. Current: leave at ~800 kA as on 1070725009 Try to play around to get ohmic EDA H-mode. b. Reduce RGAP dynamically as much as possible - try to find minimum RGAP where we still get EDA H-mode c. Bring field down to around 3.6 T to reduce q95 to around or under 3 so as to improve field line pitch to antenna. 2. Finish up the portions of the MP719 run plan that we didn't get to on 1120814 a. (3-6 shots) Explore PLL operation with +90, +180 degree phasings, which we either didn't get or barely got, and revisit -90 degree phasing. Require cell access each time we desire to change phasing. b. Disengage PLL and return to frequency scanning i. (2-4 shots) try to add another low and high q-points to q-scan, MP719 Part 3 ii. (1-2 shots) Dynamic q-scan - try to ramp q95 in range from ramp field, targeting from 2.5-4.5 T from 0.9-1.5 s, sweeping qcm frequency 3. GPI - run 500 Hz AM, and step frequency in 3 ranges, 90 kHz (0.5-1.167 s), 120 kHz (1.167-1.33 s), 150 kHz (1.33-1.50 s)

Physics Operators Plans

Entered: Aug 30 2012 03:37:34:990PM

Author: Syunichi Shiraiwa

Run Plan for 1120831 MP 712 "Density range and dependence of I-mode in Rev Bt LSN plasmas" Session Leader: Amanda Hubbard Physics Operator: Syun'ichi Shiraiwa ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120829015 Acoil: -Dtop +Dbot +Jtop 1Jbot (reversed field) 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 DISABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): Yes !!! He ECDC (2hrs) !!! ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): yes DNB (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: He at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Aug 31 2012 04:17:27:907PM

Author: Mike Churchill

The purpose of these experiments was to run a number of I-mode shots with L-gap scans to improve profile coverage for HFS CXRS measurements. We did an Ip scan over a number of shots, starting at 1.1MA, and ending at 1.3MA. RF power was kept around 3MW, but was stepped up to 4MW later in the shot. Despite the scan, the majority of the shots had similar edge temperatures (as seen by eye with GPC Te8). A number of shots had succesful L-gap scans (shots 5 through 11), that worked well in filling in the HFS profiles. We tried running ELMy I-modes from 1120830010, but were unsuccessful. A plasma was achieved in shot 15, but no ELMs were present We might run into some trouble with the Thomson profiles, J. Walk says there is higher background signal than normal, and that one of the lasers wasn't behaving well, so every other frame every other view is bad.

Entered: Aug 31 2012 06:35:12:390PM

Author: Theodore Golfinopoulos

1120831, Second Half (Shots 17-32) MP719 Session Leader Summary The Shoelace antenna ran under MP719 for the second half of 1120831 (having run in piggyback during part of the first half). We spent the afternoon trying to develop an ohmic, upper-single-null, reverse-field EDA H-mode. To begin, tried to resurrect shot from 1070725009 - this was upper single null, and had just a little bit of intermittent RF power from 1.3 s, at which time the plasma goes into H-mode. We modified the shot to have a low-field startup, with an initial field of around 3.6 T to aid access to H-mode. We also reduced RGAP for the antenna's sake to around 3 mm - the minimum level at which we could consistently achieve H-modes. While we managed to get short ELM-free H-modes starting on Shot 20, especially into rampdown, we never achieved an EDA H-mode. This may have been the result of high radiated power - had we boronized the night before the run, we might have avoided this issue. We tried ramping up the field halfway through the shot to increase q95 (Shots 28, 30, 31), bumping up the density target (up to NL04=1.1x10^20 m^-2) to increase collisionality (Shots 20, 23, and putting a short rampdown in Ip at 1.0 s from 800 to 750 kA at the rampdown slope (Shot 32). None of these adjustments seemed to help. On the plus side, the Shoelace antenna seems to be operating all right. There are instances where its resistance takes several short hikes - maybe 30-70 % in value - before sharply falling back to its nominal level (see e.g. Shot 26, especially during disruption at 1.4 s). In these cases, the inductance stays flat. We are wondering whether there is an intermittent or bad contact somewhere. Otherwise, we had ~65 to ~75 A in the antenna during our run, which is normal for the power input we had programmed. Shots 26 and 28 have some hint of activity in the QCM band - they may be interesting to look at. You can see in the plot below that the cross coherence reveals some possible Shoelace signal on PCI on Shot 26, especially just after the flattop sets in, and that the peak frequency in the PCI spectrum tracks the Shoelace frequency in a few instances. Shot 28 is similar:

Physics Operator Summaries

Session Leader Comments
Aug 31 2012 08:23:07:200AM		Amanda Hubbard	The word from ICRF crew is that despite valiant efforts to reinstall the E-port tube which failed on Wednesday, it will not be operational. The run and plan for the day is thus up in the air - stay tuned.
Aug 31 2012 09:28:59:093AM	1120831001	Mike Churchill	Start with shot 1120829015, 1.1MA, 5.8T, nl04 0.7, flat RF @ 3.5MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.7s to 0.8s increase to 1.2cm from 0.8s to 1.0s stay at 1.2cm till end We are trying out this scan to avoid the decreased core rotation effect we saw when decreasing the L-gap too far and too quickly towards the wall. The target shot didn't reach steady I-mode till 0.9s, hopefully with the increased RF power it will reach it at before, at 0.8s. RESULT: Early disruption, 0.7s. Perhaps a good thing, as there was deuterium ECDC last night NEXT: Repeat. Matt suggests dropping initial power to 3MW, avoid early tungsten injections.
Aug 31 2012 09:30:07:430AM	1120831002	Mike Churchill	PLAN: Start with shot 1120829015, 1.1MA, 5.8T, nl04 0.7, flat RF @ 3.0MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.7s to 0.8s increase to 1.2cm from 0.8s to 1.0s stay at 1.2cm till end RESULT: NEXT:
Aug 31 2012 09:42:15:413AM	1120831002	Mike Churchill	PLAN: Start with shot 1120829015, 1.1MA, 5.8T, nl04 0.7, flat RF @ 3.0MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.7s to 0.8s increase to 1.2cm from 0.8s to 1.0s stay at 1.2cm till end RESULT: Disruption around 0.66s NEXT: Move RF back by 100ms (along with gap scan and puffs)
Aug 31 2012 09:52:33:553AM	1120831003	Mike Churchill	PLAN: Start with shot 1120829015, 1.1MA, 5.8T, nl04 0.7, flat RF @ 3.0MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s stay at 1.2cm till end RESULT: Fizzle? Bounce? NEXT: Repeat
Aug 31 2012 10:14:31:720AM	1120831004	Mike Churchill	PLAN: Start with shot 1120829015, 1.1MA, 5.8T, nl04 0.7, flat RF @ 3.0MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s stay at 1.2cm till end RESULT: Good shot, data looks good. Some PMTs saturating, but they are all in the SOL NEXT: 1.2MA
Aug 31 2012 10:29:52:200AM	1120831005	Mike Churchill	PLAN: I-mode, 1.2MA, 5.8T, nl04 0.7, flat RF @ 3.0MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s stay at 1.2cm till end RESULT: Good shot, gap only moves 2mm. NEXT: Repeat, reduce the inital gap further. Keep nl04, it was at 0.8 (target 0.6). Add 2nd puff and gap scan, along with RF power step.
Aug 31 2012 10:30:54:943AM	1120831006	Mike Churchill	PLAN: I-mode, 1.2MA, 5.8T, nl04 0.7, flat RF @ 3.0MW Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s decrease to 0.8cm from 1.15s to 1.3s RESULT: NEXT:
Aug 31 2012 11:22:11:883AM	1120831007	Mike Churchill	PLAN: I-mode, 1.2MA, 5.8T, nl04 0.7, RF 3MW from 0.7 to 1.25s, 4MW from 1.25s to 1.4s Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s decrease to 0.8cm from 1.25s to 1.4s RESULT: Good plasma. Forgot to change the 2nd puff. NEXT: Puffs are causing a large density increase, move further back.
Aug 31 2012 11:03:05:590AM	1120831008	Mike Churchill	PLAN: I-mode, 1.2MA, 5.8T, nl04 0.7, RF 3MW from 0.7s to 0.8s, step to 4MW 0.8s to 1.4s Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s decrease to 0.8cm from 1.25s to 1.4s RESULT: NEXT:
Aug 31 2012 11:29:38:060AM	1120831009	Mike Churchill	PLAN: I-mode, 1.3MA, 5.8T, nl04 0.7, RF 3MW from 0.7s to 1.2s, step to 4MW 1.2s to 1.4s Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s decrease to 0.8cm from 1.25s to 1.4s RESULT: Good shot. 2nd gap scan better timing. Very strange reduction in sawteeth amplitude at ~1s, the BV CXRS spectra has a large spike NEXT: Repeat. See if the BV spike goes away. PO changing something so triangularity more constant at the end, see if helps keep the density down.
Aug 31 2012 12:25:24:613PM	1120831011	Mike Churchill	PLAN: I-mode, 1.3MA, 5.8T, nl04 0.7, RF 3MW from 0.7s to 1.2s, step to 4MW 1.2s to 1.4s Change the L-gap to go from: 1cm start drop to 0.8cm from 0.8s to 0.9s increase to 1.2cm from 0.9s to 1.1s decrease to 0.8cm from 1.25s to 1.4s RESULT: Good shot. Sawteeth again reduced around 1s, but no change in the BV spectra this time. Hmmm...Thomson positioning is better, we'll see if it gives better pedestal coverage. John says too far, the density doesn't have a SOL point. Not too worrisome, as it is an I-mode density profile (flat) NEXT: Move onto ELMY I-modes, load shots 1120830010
Aug 31 2012 12:12:29:700PM	1120831012	Mike Churchill	PLAN: ELMy I-mode RESULT: PO didn't load shot, same as 11 NEXT: Load the ELMy H-mode
Aug 31 2012 01:20:49:030PM	1120831017	Theodore Golfinopoulos	1120831016 Another try at Thomson calibration. Shoelace running from 0.5-1.5 s freq.: 85-185 kHz amp.: flat at 216 PLL: Engaged at +90 degree phasing - if we lock to a mode, PLL will take over RF amp in control.
Aug 31 2012 02:23:26:763PM	1120831018	Theodore Golfinopoulos	Try to resurrect 1070725009 Phys. Op. Syun'ichi Shiraiwa is reprogramming the traces from the old shot onto the last shot. Changes: low-field startup, start and hold at 3.5 T Current: 800 kA Shoelace - same as last shot. Running from 0.5-1.5 s freq.: 85-150 kHz amp.: flat at 216 PLL: Engaged at +90 degree phasing - if we lock to a mode, PLL will take over RF amp in control. Result: Fizzle Next: Phys. op. will play, then try again.
Aug 31 2012 02:23:01:713PM	1120831019	Theodore Golfinopoulos	Shoelace - same as last shot. Running from 0.5-1.5 s freq.: 85-150 kHz amp.: flat at 216 PLL: Engaged at +90 degree phasing - if we lock to a mode, PLL will take over RF amp in control. Result: Got a full-length shot - good job, Syun'ichi. Got some bumps in density that might be little H-modes. We had Ar puffs where we didn't want them. No QCM. Next: reduce RGAP to 5 mm, turn off Ar puffs, try again. Same Shoelace operating paraemeters.
Aug 31 2012 02:39:51:613PM	1120831020	Theodore Golfinopoulos	Had RGAP at 7 mm, turned of Ar puffs. Same Shoelace parameters. Result: Got 3 ELM-free H-modes and maybe something a little more EDA-ish at the end - great! But no evidence of a QCM, at least on PCI_31. Next: Bring RGAP down to 5 mm, bump up density target in ohmic phase to around NL04=1x10^20 m^-2. Hope that we clear out some more Ar. Shoelace - same as last shot. Running from 0.5-1.5 s freq.: 85-150 kHz amp.: flat at 216 PLL: Engaged at +90 degree phasing - if we lock to a mode, PLL will take over RF amp in control.
Aug 31 2012 02:55:01:930PM	1120831021	Theodore Golfinopoulos	RGAP bounces between 0.5 and 1 cm Got 5 H-modes! But none look EDA-ish - all ELM free, it seems. Some little ablation from Shoelace antenna visible on LLNL1 camera. On Shoelace resistance trace, you can see 3 little bumps in resistance. But we're running okay - getting between 67 and 75 A in antenna. Next: ramp RGAP down to zero starting at 1.0 s - see minimum gap that still allows for H-modes.
Aug 31 2012 03:22:40:660PM	1120831022	Theodore Golfinopoulos	3 H-modes and a baby. Look like ELM-frees. No QCM. Didn't quite get as small an RGAP as we wanted. Next: start RGAP at 3 mm and scan down from there. Increase density by 10 % to try to get more collisional and help us get into EDA. Still running Shoelace with same parameters.
Aug 31 2012 03:24:58:083PM	1120831023	Theodore Golfinopoulos	Got RGAP scan from 4 mm to "0" on EFIT. Disrupt around 1.3 s. Next: hold RGAP to value at 1.1 s. Back off on density - back to 1.0x10^{20} m^-2. Same Shoelace parameters.
Aug 31 2012 03:23:35:430PM	1120831024	Theodore Golfinopoulos	Got a late H-mode after RGAP pulls away. Lesson might be that we need a bigger RGAP. Next: push RGAP to 3 mm and see if we can't get H-mode back.
Aug 31 2012 03:48:52:963PM	1120831025	Theodore Golfinopoulos	Got 3 H-modes - backing off on RGAP seemed to help. Also, made plasma a little more conformal to antenna by moving out lower x-point. Still no EDAs. The slightest hint of some coherent activity in the QCM band visible around 1.0 s on PCI_31. Next: Turn off cryo pump, with idea that it tends to promote ELM-free H-modes. Leave other parameters same.
Aug 31 2012 04:16:42:677PM	1120831026	Theodore Golfinopoulos	Two H-modes, but still no long EDAs. Plasma disrupts around 1.4 s. Shoelace antenna Amplifier 2 trips around time of disruption. Amplifier 1 stays on to 1.5 s. Interesting: around 1.08 s, there is some activity around 109 kHz, with a bright stripe that seems to track our Shoelace frequency sweep for 1.078 s at 110.6 kHz to 1.086 s, 103.1 kHz. This happens again, maybe, at 1.097 s, 82.0 kHz to 1.101 s, 87.7 kHz, and possibly again around 1.28 s. We'll have to look at more detailed analysis later. Next: put in step in toroidal field at 1.0 s, presumably after H-mode, up to 4.5 T to try to raise q95 and get into EDA. This is likely at the expense of matching to antenna.
Aug 31 2012 04:12:53:040PM	1120831027	Theodore Golfinopoulos	Disruption. Next: try again. Same parameters.
Aug 31 2012 04:29:34:770PM	1120831028	Theodore Golfinopoulos	Full-length plasma. Got two H-modes and a little one at the end. It looks like the density rise is slower, and there is a hint of activity in the QCM band, but still no EDA. Also, Shoelace antenna tripped after first back-transition from H-mode. Next: push field up even higher - try to start at 4.0 T instead of 3.5 T, and jump to 5.0 T instead of 4.5 T. This is at expense to antenna match, but we want to establish an EDA H-mode. Also, change Shoelace antenna sweep range from 85-135 kHz to try to avoid tripping.
Aug 31 2012 04:51:25:257PM	1120831029	Theodore Golfinopoulos	H-mode only after rampdown that time. There was an injection - plasma survived. Change Shoelace frequency range to be 100-120 kHz, 10 Hz FM. Next: go back to 3.5 T startup, bring back Shot 28.
Aug 31 2012 04:52:14:680PM	1120831030	Theodore Golfinopoulos	Again, only a small H-mode in rampdown. Next: lower density target to 0.9x10^20 m^-2 - otherwise, leave the same. Shoelace: change frequency range to be 90-120 kHz, and run from 0.75-1.75 s to chase H-modes into rampdown.
Aug 31 2012 05:04:52:673PM	1120831031	Theodore Golfinopoulos	Again, only an H-mode in rampdown. Next: Hold Bt at 3.5 T. Now, institute a rampdown of Ip at 1.0 s from 800 to 750 kA at same dIp/dt slope of rampdown, making use of Jerry Hughes observation (and confirmation today) that rampdown in current aids transition to H-mode. Keep Shoelace parameters same.
Aug 31 2012 05:32:58:017PM	1120831032	Theodore Golfinopoulos	Removed Bt step and put in small Ip rampdown at 1.0 s. Result: only H-mode in rampdown. Little drop in Ip didn't help. Last shot of the day - thanks, all.

Physics Operator Comments
Aug 31 2012 04:34:06:530PM		Syunichi Shiraiwa	Got a full length plasma. Next: reload shot 28 eliminate RXL scan (increase the lower tri..)
Aug 31 2012 09:31:13:560AM	1120831001	Syunichi Shiraiwa	We are running MP different from what was planned yesterday. setting for the first shot... Load 1120829015 Seg01 label saied nocryo startup, but had pre-puff 50ms. Probably it is enouth. Put clearin scan program as requested result: breakdow is ok disrupted. next: reduce prepuff to 43ms
Aug 31 2012 09:34:49:160AM	1120831002	Syunichi Shiraiwa	Break down is ok. Disrupted around 0.6s
Aug 31 2012 09:40:45:747AM	1120831002	Syunichi Shiraiwa	Break down is ok. Disrupted around 0.6s Next: delays rf and gap scan by 100ms.
Aug 31 2012 09:44:07:963AM	1120831002	Syunichi Shiraiwa	Break down is ok. Disrupted around 0.6s Next: delays rf and gap scan by 100ms.
Aug 31 2012 09:52:49:347AM	1120831003	Syunichi Shiraiwa	Break down is ok. Plasma died around 25ms with 100kA... Next:
Aug 31 2012 09:58:47:827AM	1120831003	Syunichi Shiraiwa	Break down is ok. Plasma died around 25ms with 100kA... Next: change pre-puff from 42ms to 40ms
Aug 31 2012 10:13:18:980AM	1120831004	Syunichi Shiraiwa	Went through the flat top. this one had the same G-side pressure before break down Next: adjust ne04 to eliminate the dip around 0.5s set Ip 1.2MA
Aug 31 2012 10:27:58:520AM	1120831005	Syunichi Shiraiwa	went through the flat top Next: increase the width of clearin scan. changed clearin upon SL request.
Aug 31 2012 10:44:10:703AM	1120831006	Syunichi Shiraiwa	went through the flat top Next: changed clearin upon SL request.
Aug 31 2012 11:11:02:050AM	1120831008	Syunichi Shiraiwa	went through the flat top indent of Ip at 0.3s (happeded in the last shot) did not happen this shot. Next: increase plasma current to 1.3MA
Aug 31 2012 11:23:40:410AM	1120831009	Syunichi Shiraiwa	1.4MA. Stays till entering the ramp-down q95 = 3.05....
Aug 31 2012 11:45:04:147AM	1120831010	Syunichi Shiraiwa	Again, the plasma went though the flat to phase. but, disrupted at 1MA.... The RXU was chaged to (hopefully) reduce the density increase towards the end of pulse. but it did not make much change. Next: increase ZCUR by 4mm increas H-bot puff to 125ms
Aug 31 2012 11:58:39:157AM	1120831011	Syunichi Shiraiwa	Disrupted during rump-down at 1MA Next: load 1120830010 seg 2 into seg2.
Aug 31 2012 12:12:31:250PM	1120831012	Syunichi Shiraiwa	the same setting as shot 11. po mistake. next: load the program for 11....
Aug 31 2012 12:30:20:847PM	1120831013	Syunichi Shiraiwa	disrupted during the ramp-up
Aug 31 2012 12:59:21:340PM	1120831015	Syunichi Shiraiwa	Full length plasma Next: cryo off ECE cut-off shot, Loaded 1120830016
Aug 31 2012 01:15:39:860PM	1120831016	Syunichi Shiraiwa	Density ramp from 1 to 2 was programmed, but disrupted when it became 1.8e20 (at 1.5s Next: 3.9T with the same ne program Next after the next: moving on MP 719 enabled cryo-on
Aug 31 2012 02:10:37:263PM	1120831018	Syunichi Shiraiwa	This shot was an attempt to break down at 3T and upper single null result: disrupted early ramp-up phase. the changes which was not done 1) offset of rcur, zcur 2) reference point of clear in 3) timing to switch between seg 1 and seg 2 4) initial TF coil current in seg 2 5) crawber timing
Aug 31 2012 02:28:46:220PM	1120831019	Syunichi Shiraiwa	got a full length plasma next: increase rcur by 7mm to reduce outer gap by 14mm
Aug 31 2012 02:36:19:513PM	1120831020	Syunichi Shiraiwa	3-4 H-mode. next: increase rcur by 1mm increase ne04 to 1e20
Aug 31 2012 02:51:09:333PM	1120831021	Syunichi Shiraiwa	Full length plasma still have the outer gap around 5-6mm. Next scan the outer gap from the present one to 0
Aug 31 2012 03:06:40:753PM	1120831022	Syunichi Shiraiwa	Full length plasma/ 3 or 4 ELM fully H-mode. Next: reduced outer gap further increased ne by 10%
Aug 31 2012 03:09:10:677PM	1120831023	Syunichi Shiraiwa	Disrupted at 1.3s
Aug 31 2012 03:34:18:570PM	1120831024	Syunichi Shiraiwa	full length plasma. no H-mode Next: decreased Rcur by 0.5mm adjust ne04 gain.. increase rxl by 3cm
Aug 31 2012 03:44:51:717PM	1120831025	Syunichi Shiraiwa	3 elm free H-mode. Next: turn-off cryo-pump shorten pre-puff to 27ms
Aug 31 2012 03:54:55:277PM	1120831026	Syunichi Shiraiwa	2 H-mode and disrupted at 1.4s next : reload shot 25 (enabled cryo-pump) added step in Bt at 1s (increase to 4.5T)
Aug 31 2012 04:04:12:610PM	1120831027	Syunichi Shiraiwa	Early disruption. Something came into plasma at 0.17s
Aug 31 2012 04:07:17:203PM	1120831027	Syunichi Shiraiwa	Early disruption. Something came into plasma at 0.17s Next: repeat.
Aug 31 2012 04:22:20:977PM	1120831028	Syunichi Shiraiwa	Two H-mode phases, still having a trouble to get EDA Next: increase the field to 4T and jump to 5T at 1s
Aug 31 2012 04:34:18:823PM	1120831029	Syunichi Shiraiwa	Got a full length plasma. Next: reload shot 28 eliminate RXL scan (increase the lower tri..)
Aug 31 2012 04:54:12:493PM	1120831031	Syunichi Shiraiwa	H-mode during the ramp-down
Aug 31 2012 05:07:58:910PM	1120831032	Syunichi Shiraiwa	did not get H-mode during the IP step, instead the transition happend during the ramp-down again.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:19:18:940AM	Plasma	Ok
2	09:31:47:080AM	Plasma	Ok
3	09:47:55:927AM	Plasma	Ok
4	10:00:31:893AM	Plasma	Ok
5	10:13:55:470AM	Plasma	Ok
6	10:29:33:967AM	Plasma	Ok
7	10:47:11:480AM	Plasma	Ok
8	11:01:53:650AM	Plasma	Ok
9	11:17:43:590AM	Plasma	Ok
10	11:32:40:870AM	Plasma	Ok
11	11:47:56:320AM	Plasma	Ok
12	12:07:32:480PM	Plasma	Ok
13	12:26:38:197PM	Plasma	Bad	OH1 self powered circuit
14	12:40:17:483PM	Plasma	Ok
15	12:52:45:107PM	Plasma	Ok
16	01:05:26:567PM	Plasma	Ok
17	01:19:19:000PM	Plasma	Ok
18	01:49:14:853PM	Plasma	Ok
19	02:13:28:923PM	Plasma	Ok
20	02:29:06:160PM	Plasma	Ok
21	02:41:28:103PM	Plasma	Ok
22	02:54:03:630PM	Plasma	Ok
23	03:06:43:290PM	Plasma	Ok
24	03:19:14:267PM	Plasma	Ok
25	03:33:53:423PM	Plasma	Ok
26	03:46:23:847PM	Plasma	Ok
27	03:59:19:430PM	Plasma	Ok
28	04:11:45:667PM	Plasma	Ok
29	04:24:10:287PM	Plasma	Ok
30	04:36:36:660PM	Plasma	Ok
31	04:50:43:127PM	Plasma	Ok
32	05:03:01:890PM	Plasma	Ok

System Availability

Aug 31 2012 09:18:59:663AM

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