Miniproposals

Miniproposal: 697 Date Filed: 5/5/2012 Title: First operation of Shoelace Antenna: Survey of boundary plasma response First Author: Brian Labombard Session Leader: Theodore Golfinopoulos (shots 1-29)

Engineering Operator Run Comment

MP697 - Shoelace Antenna: Survey of boundary plasma response

Session Leader Plans

Entered: Jul 11 2012 08:50:44:870PM

Author: Theodore Golfinopoulos

MP697 - Shoelace Antenna: Survey of boundary plasma response Day 2, Ohmic EDA H-mode The primary goal of this run is to look at interaction between the Shoelace antenna and the quasi coherent mode. A secondary goal is to determine whether the Shoelace can drive a QCM in a plasma where the mode has been suppressed. Diagnostic setup: Full set of Mirnov coils A-port scanning probe with magnetic head F-port scanning probe GPI, PCI, differential TCI, reflectometer Edge Thomson (for EDA H-Mode) Desired: Edge reflectometer, scanning frequencies and fluctuations (C. Lau) Edge Thomson WASP probe HIREX, CXRS for rotation No DNB, ICRF, LH Overnight boronization 2 hours of ECDC in helium on morning prior to run, standard parameters. Reference Shots: Otherwise, base plasma from 1120620009 (for low field startup) Use 1000928022 for guidance on field ramp to enter ohmic EDA H-mode Run Plan: 1. Establish ohmic EDA H-mode (4-8 shots) Here we will try to establish an ohmic EDA H-mode, using a technique of toroidal field ramp down/up, as was done in Shot 1000928022, but with a low-field start-up. - Program toroidal field to 3.5 T startup and flattop to 0.6 seconds. - Program toroidal field ramp-down to 2.5 T, starting at 0.6 s and ending at 1.0 s - Program toroidal field ramp-up to 3.5 T, starting at 1.1 s and ending at 1.5 s - Adjust toroidal field ramp and plasma density to optimize EDA H-mode - Run ASP in scanning mode to obtain k_r of intrinsic QCM - Run Shoelace antenna in RECEIVER MODE - try to optimize QCM response on Shoelace - Once a good ohmic EDA H-mode is achieved, try to flatten out field scans to produce a stationary plasma for some portion of the shot, and optimize by keeping outer gap small (0.5 cm or less). 2. Affect QCM with Shoelace (8 shots) ***Cell access - switch Shoelace from RECEIVER to DRIVER mode.*** 2.1 (4 shots) Program SLA frequency trajectory to dither about QCM frequency. Follow frequency trajectory of QCM observed in Part 1 (ideally from Shoelace signal). For time prior to QCM onset, use initial frequency of QCM as center frequency. -For each sub-part, operate ASP for one shot in fixed mode and one shot in scanning mode. -If effect on intrinsic QCM is seen on fluctuation diagnostics (e.g. frequency of QCM changes, perhaps due to rotation spin up/down Doppler shift), then take repeated shots to explore/optimize with changes to frequency programming or plasma conditions. 2.1a (2 shots) Scan around QCM center frequency by +-5 kHz, with 10 full triangle wave cycles from 0.5 to 1.5 s (i.e. slew rate of 10*2*(5 kHz)/(1 s) = 100 kHz/s). 2.1b (2 shots) Increase scanning range to +-25 kHz, with 5 full triangle wave cycles from 0.5 to 1.5 s 2.2 (4 shots) Now, rather than dithering frequency, just follow center frequency trajectory +2.5 kHz, and employ amplitude modulation, square wave with 50 %/50 % duty cycle. 1 shot 500 Hz AM, 1 shot 100 Hz AM, 1 shot 10 Hz AM. Then, take 1 shot with 100 Hz AM with RF frequency 2.5 kHz below center observed QCM center frequency. 3. Drive QCM with Shoelace (7-8 shots) -Operate ASP in scanning mode. Try to suppress QCM (make marginally stable), and then pull it back with Shoelace. 3.1 (1-2 shots) Delay TF ramp-up or remove it to suppress natural QCM/EDA transition. Establish a shot where the QCM is suppressed. 3.2 (3 shots) Attempt to induce QCM in ELM-free phase. Program Shoelace frequency trajectory to match QCM seen in Parts 1 and 2. Use fixed frequency and no amplitude modulation. -Shift frequency trajectory of second shot by +10 kHz, of third shot by -10 kHz. 3.3 (3 shots) Repeat 3.2 with amplitude modulation at 500 Hz and 100 Hz. Total: 19-24 shots 4. Supplementary shots... (if time allows, in order of priority) (4-5 shots) 4.1 Stabilize via reducing triangularity 4.1a (1-2 shots) Restore field ramp as in Part 2, but try to stabilize by reducing triangularity. 4.1b (1 shot) Operate Shoelace antenna as on first shot of 3.2 4.1c (1 shot) Repeat first shot of 3.3 (amplitude modulation) 4.2 (1 shot) locked mode shot for absolute rotation velocity calibration. 4.3 (1 shot) Repeat 2.2, but rather than have fast AM, leave antenna on for 3/4 of EDA H-mode, and turn off for last quarter - single edge. Look to see whether hot spots on GH limiter are resulting from Shoelace operation.

Physics Operators Plans

Entered: Jul 11 2012 05:08:57:953PM

Author: Jerry Hughes

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120620013 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi He4 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): YES Overnight ECDC (yes/no): 2 hours in He following boronization ICRF(yes/no): no LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: He at 5e-5 Torr sweep: 44/45/103 cm scan: 20/120 s Duration: 2 hours --------------------------- PO setup: ---------------------------- Load from 1120620013 Seg01 is a low-field startup Seg03 is the active segment, starting at t=0.080s. It diverts early. In Seg3 set TF to -150000A from 0.7 to 1.5. Save as shot 1120712666 in /home/jwhughes/physop/pcs_scratch/ At some point, SL will request a field ramp-down to <3T to access Ohmic H-mode. Reference shot is 1000928022. This has TF ramping from -67000A to -110000A over about 500ms. When we go for Ohmic H-modes, I'll try to reproduce this type of trace. Actually, forget about shot 1120712666. They don't actually need 5.4T at all, as that is a holdover from ICRF boronization recovery. SL requests loading 1120620009 for the first shot.

Session Leader Summaries

Entered: Jul 12 2012 06:56:06:223PM

Author: Theodore Golfinopoulos

Very interesting run day. Phys. Op. Jerry Hughes managed to give us ohmic EDA H-modes - we got about 14 H-modes, 12 with good QCMs. We also had some drama in the form of a street-wide evacuation due to a gas main leak caused by nearby construction. It would not seem that the Shoelace antenna readily induces a QCM and starts and EDA H-mode earlier than usual. Any effect on the QCM caused by the Shoelace antenna will have to be teased out of transfer function, and cross correlation analysis, and antenna-ON/OFF diagnostic signal binning. Nonetheless, we have good Shoelace signals on a number of Mirnov coils, as well as the ASP scanning coil, and so we have a place to start. And the Shoelace did very well in receiver mode. By the numbers: 29 attempts 9 fizzles 20 full-length plasmas 14 H-modes 12 H-modes with strong QCMs 8 shots with Shoelace in drive mode 6 shots with Shoelace in receiver mode picking up strong QCM Shot Shoelace Operation Mode comment 1 Receiver Full-length, no ohmic EDA 2 Receiver Fizzle 3 Receiver Fizzle 4 Receiver Fizzle 5 Receiver Full-length, no ohmic EDA 6 Receiver Fizzle 7 Receiver Full-length, no H-mode 8 Receiver Fizzle 9 Receiver ohmic H-mode - first H-mode of the day 10 Receiver Fizzle 11 Receiver ohmic H-mode, first QCM 12 Receiver Fizzle 13 Receiver ohmic H-mode with QCM 14 Receiver Fizzle 15 Receiver Full-length, no H-mode 16 Receiver ohmic EDA H-mode, strongest QCM signal on Shoelace 17 Receiver Fizzle 18 Receiver ohmic EDA H-mode, QCM visible 19 Receiver H-mode, No QCM, however (except maybe from 1.261-1.273). 20 Receiver ohmic EDA H-mode, QCM visible 21 Receiver ohmic EDA H-mode, QCM visible 22 FM +-7.5 kHz dither First shot with Shoelace in drive mode; ohmic EDA H-mode 23 FM +-15 kHz dither ohmic EDA, Shoelace drive mode 24 AM 99.5 Hz ohmic EDA, Shoelace drive mode 25 AM 9.5 Hz ohmic EDA, Shoelace drive mode 26 AM 499.5 Hz ohmic EDA, Shoelace drive mode 27 AM 499.5 Hz ohmic EDA, Shoelace drive mode 28 AM 499.5 Hz ohmic EDA, Shoelace drive mode 29 AM 499.5 Hz ohmic EDA, Shoelace drive mode Sheet 2: SheetTemp Shot rgap [cm] q95 nl04 Shoelace freq AM/FM comment 1 0.45 3.6-2.7-3.2 0.8 Full-length, no ohmic EDA 2 Fizzle 3 Fizzle 4 Fizzle 5 0.2 3.3-2.5-3.1 0.83 Full-length, no ohmic EDA 6 Fizzle 7 Full-length, no H-mode 8 Fizzle 9 ohmic H-mode - first H-mode of the day 10 Fizzle 11 ohmic H-mode, first QCM 12 Fizzle 13 ohmic H-mode with QCM 14 Fizzle 15 Full-length, no H-mode 16 ohmic EDA H-mode, strongest QCM signal on Shoelace 17 Fizzle 18 ohmic EDA H-mode, QCM visible 19 20 21 22 FM First shot with Shoelace in drive mode; ohmic EDA H-mode 23 FM ohmic EDA, Shoelace drive mode 24 AM 99.5 Hz ohmic EDA, Shoelace drive mode 25 AM 9.5 Hz ohmic EDA, Shoelace drive mode 26 AM 499.5 Hz ohmic EDA, Shoelace drive mode 27 AM 499.5 Hz ohmic EDA, Shoelace drive mode 28 AM 499.5 Hz ohmic EDA, Shoelace drive mode 29 AM 499.5 Hz ohmic EDA, Shoelace drive mode

Physics Operator Summaries

Entered: Jul 12 2012 05:35:25:940PM

Author: Jerry Hughes

Is that the smell of physics? No, actually it's methyl mercaptan. Today was good in that a reliable Ohmic EDA target, with low-field startup, was developed. Future POs and SLs looking to run this kind of a shot should have a look at shots 20--29. These have nearly identical programming up to about t=1s, and they all ran reasonably well. They had various TF programs following 1s, and you can pick your favorites. I had a slow start in the AM after loading the low-field startup that was used on 1120620. It turned out to be not very robust, with several fizzles observed during the first 10 or so shots. I lost a couple of shots because I didn't realize the ratiomatic is UNCALIBRATED today, and is reading almost a factor of 3 too low. I was pushing up the PG4 pre-puff on shots 3 and 4, when I should have been lowering it. Grateful to Wolfe for catching this. Even with this correction, current rises were not very strong, and we had lots of carbon light in the startup which wasn't well explained. There were numerous tweaks to the puffs and the EF4. (See detailed PO entries) Finally Wolfe suggested I insert a 0.001T offset into the BR0 controller on shot 17. After that the fields got better. Shots 18--29 all started up reasonably well. Also around this time the building was evacuated because construction workers broke a high pressure natural gas line next door. Actually the entire block was evacuated, and several of us went to get frappes. Total delay introduced was ~90 minutes. Despite this gap, we did squeeze out 29 shots by 5pm. Scorecard: 0 duds 9 fizzles 1 flattop disruption 19 plasmas

Session Leader Comments
Jul 12 2012 09:09:27:380AM	1120712001	Theodore Golfinopoulos	1120712001 Goal: Establish ohmic EDA H-mode Result: Shot ran full length, but didn't get ohmic EDA H-mode. Next: Try to drop field field to 2.5 T. Raise current to 750 kA. Hope that density is a little lower on next shot.
Jul 12 2012 09:16:26:843AM	1120712002	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 09:42:24:607AM	1120712003	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 09:42:29:610AM	1120712004	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 10:09:22:300AM	1120712005	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Before this shot, went in and turned off Shoelace RF amplifiers and power to all systems in matching network half rack. This was in response to some noise seen on Shoelace pickup around 100 kHz, in several pulses, including around 1.5 s (before and after). Result: full-length plasma. No ohmic EDA H-mode. Shoelace antenna picks up somewhat coherent signal around 100 kHz during current flattop, spinning down slightly in frequency - change in plasma rotation? Rotation calibration? ASP magnetic head picks up broadband turbulence. We can get omega-k spectrum from two coils on mag head and compare component at antenna k with antenna's pickup to see whether the antenna is picking out the part of the broadband spectrum with matched k. (Antenna voltage still picks up spurious signal, around 1.5 V - comes in after 1.5 s on this shot.) Next: try for ohmic EDA H-mode.
Jul 12 2012 10:17:50:360AM	1120712006	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 10:30:52:543AM	1120712007	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: similar to Shot 5. Still see a somewhat coherent signal on Shoelace pickup that spins down slightly in frequency - more for comparison with omega-k off of ASP (running in dwell). Next: try to get ohmic EDA H-mode. Increase RGAP and lower strike point to get closer to reference shot, 1000928022.
Jul 12 2012 10:38:06:473AM	1120712008	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 11:32:32:233AM	1120712009	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: First H-mode of the day! Good job, Phys. Op. Jerry! ELM-free H-mode, comes in around 0.64 s, comes out around 0.96 s. Had lowered strike point, and now it hits the floor. Alex Tronchin-James reports some iron comes in around time when strike point hits the floor. Beautiful coherent structures in Mirnov coils during H-mode! Start out at 50, 80, 105, and 132 kHz, and sweep down to 30, 50, 67, and 82 kHz when H-mode goes out, at which time the disappear and broadband noise comes back. Visible on BP01_GHK, implies low mode number. Hm. Not visible on Shoelace receiver signal, implies low mode number. Coherent structures not obvious at first survey of a few PCI channels. Calculated toroidal mode number of lowest-frequency mode at its onset using modecalc. BP1,2T_ABK give n=+3. BP1,3T_ABK gave n=+6. BP1,3T_GHK give n=-3. I think there is an error with either labeling of the coils (i.e. signal from BP1T_GHK is going to BP3T_GHK or something like this) or sign. I'm thinking the latter, since there was some confusion before. A sawtooth had n=+1 from BP1,2T_ABK and n=-1 from BP1,3T_GHK. Next: come on, EDA!
Jul 12 2012 11:04:10:510AM	1120712010	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 12:56:22:287PM	1120712011	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Got another H-mode! Comes in around 0.7 s; density drops around 1.12, but D_alpha comes up - trying to hit EDA H-mode? Coherent structures in Mirnov coil signals are back, also. Frequency is modulating, oscillating up and down by a small amount, maybe with plasma current. The low-n modes pop out around 1.02 s, at the same time that another, single mode comes in around 78 kHz, very strong, visible on Mirnov coils (but not the ones on the poloidal array at further-out radial location), PCI, and Shoelace - very possibly QCM. This mode comes out around 1.04 s, and then comes in again from 1.07 s to 1.10 s. We're in H-mode for both these semgents. We disrupt at 1.23 s. Next: keep trying for long-lived EDA.
Jul 12 2012 12:56:50:723PM	1120712012	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 01:15:24:357PM	1120712013	Theodore Golfinopoulos	(After this shot, leak in gas main from construction between NW21 and Warehouse resulting in evacuation of building- getting back to Control Room at 1:00 PM - SL feels light-headed while writing this.) Goal: Establish ohmic EDA H-mode Result: H-mode from 1.1 to 1.475 s. ELM-free H-mode. Strong fluctuation on Shoelace centered at 77 kHz from around 1.275-1.415 s. Actually pretty narrow, maybe bandwidth of around 20 kHz or less, FWHM, but center frequency waggles a bit. Polarimeter, reflectometer, ASP magnetic coils, PCI all see mode. Low-n modes ("tearing modes") still apparent on Mirnov coils, especially on BP01_GHK, starting around 1.3 s - careful not to confuse with QCM. If the Mirnov coils are seeing QCM, they see it early when it first comes (watch "BP1T_ABK", if that is patched correctly), and then again later after it becomes week on the Shoelace. Next: translate ramp earlier - try to get H-mode earlier, and QCM, preparing to hold field and q constant at some future shot.
Jul 12 2012 01:15:58:400PM	1120712014	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 01:33:00:713PM	1120712015	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode. Result: No H-mode. No coherent fluctuations on Mirnov coil (QCM or low-n modes) or PCI. Shoelace may be sampling a portion of k-space in the omega-k spectrum. Next: Try again. Phys. op. expects a fizzle since the next shot is an even number.
Jul 13 2012 11:41:34:800AM	1120712016	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode. Shifted TF ramp back to where it was before (200 ms forward from Shot 15). Result: Got H-mode, ELM-free. Disruption at 1.57 s. QCM comes in around 1.312 s and comes out around 1.436 s, looking at Shoelace signal. Looks broader in frequency on spectrogram, but the bandwidth seems to be 10 kHz FWHM - smaller than before. Very strong QCM signal. Mirnov coils (BP1T_ABK, BP1T_GHK) see the QCM. Low-n modes come on toward end of QCM. PCI also sees QCM. So does reflectometer. So does ASP magnetic head. Modecalc says that the toroidal mode number of the QCM is |n|~=18-22 (n=-18 using BP1T_GHK and BP3T_GHK, as labeled. 2T_ABK and 3T_ABK say n=+22, 1T_ABK and 3T_ABK give n=+21, 1T_ABK and 2T_ABK say n=+19 (low correlation), 4T_ABK and 5T_ABK say n=+18 (low correlation, 0.57)). It would appear that BP1T_GHK and BP3T_GHK are labelled out of order - that is, the signal labelled as BP1T_GHK is likely actually BP3T_GHK, and vice versa. This is so because the magnitude of the mode number calculation is correct (so the assumed spacing between the modes is correct), and the sign of the integrated field is correct, but the sign of the mode number is wrong. This must have happened after the spring opening. Next: ramp to a higher field in second-half of current flattop. Aim for 5.4 T.
Jul 12 2012 02:24:36:303PM	1120712017	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: Fizzle. Next: Try again.
Jul 12 2012 02:25:03:890PM	1120712018	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode. Faster field ramp. Result: Got another ELM-free H-mode. Similar as before, but QCM signal is weaker on Shoelace compared to Shot 16. Next: Going to try freezing the field, q at value from 1.35 s from Shot 19. Try to get QCM and keep it.
Jul 12 2012 02:35:12:723PM	1120712019	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode. Result: Injection. No QCM seen on Shoelace - some weak fluctuations in band on Shoelace signal AFTER H-mode goes away. Next: Translate TF ramp earlier 200 ms, as before. Still keep fast ramp in toroidal field.
Jul 12 2012 03:19:59:563PM	1120712020	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode Result: that was an EDA H-mode - long lived. An injection killed it. See a good QCM on the Shoelace, though not as strong as on Shot 16. D_alpha comes up a little bit.
Jul 12 2012 03:20:10:767PM	1120712021	Theodore Golfinopoulos	Goal: Establish ohmic EDA H-mode. Result: nice EDA H-mode. I think we'll keep it. Got an ASP scan with magnetic head. Next: Drive Shoelace antenna!
Jul 12 2012 03:45:50:960PM	1120712022	Theodore Golfinopoulos	Goal: affect QCM Result: got QCM. Antenna ran with frequency dither. 0.75 s-1.75 s. No obvious ID of Shoelace response on PCI. Do see it on BP_EF_BOT. Seem to cross QCM range. Going to take more time, sync. det. to see if we had any effect on the QCM. Next: drop RGAP, increase range of frequency scan to +-15 kHz (for sync. det.). Increase amp_wave_w to 260.
Jul 12 2012 06:02:29:667PM	1120712023	Theodore Golfinopoulos	Goal: Wider frequency dither (+-15 kHz) for synchronous detection. Smaller RGAP. Result: Shot ran. H-mode drops out around 1.3 or 1.4 s. Not really a super-strong QCM on PCI or reflectometer - kind of intermittent - but definitely there. Next: AM with no frequency dither.
Jul 12 2012 06:05:15:990PM	1120712024	Theodore Golfinopoulos	Goal: AM on Shoelace 99.5 Hz and follow center frequency. Back off on RGAP a little bit. Result: Got it. Good for GPI analysis.
Jul 12 2012 05:54:10:990PM	1120712025	Theodore Golfinopoulos	Goal: AM 10 Hz, Shoelace at 103 kHz fixed. Result: Got it. Strong QCM visible on several diagnostics. Reflectometer 88 GHz shows a second harmonic, PCI does not, and neither does magnetics. Certainly no very obvious modulation in PCI signal from Shoelace pulses - if you squint hard, you might get excited. Look at edge around 1.17 s. Alex Tronchin-James reports camera does not see anything periodic at 10 Hz on first inspection.
Jul 13 2012 12:55:45:500AM	1120712026	Theodore Golfinopoulos	Goal: AM 500 Hz, Shoelace at 103 kHz fixed. Now, run Shoelace from 0.5-1.5 s, instead of 0.75 s-1.75 s, as before. Result: got it. BP_EF_BOT sees the Shoelace signal - BP_AB_TOP does not, except maybe briefly from 0.566-0.596. ASP does not see Shoelace signal.
Jul 12 2012 05:39:15:037PM	1120712027	Theodore Golfinopoulos	Goal: AM 500 Hz, scan ASP at 1.2, 1.4 s Result: Got it, but late disruption on shot. ASP might see something, even though we're not "mapped" to coil (i.e. q95 is not ideal for seeing Shoelace signal on ASP, per lesson from last run). That might indicate a more global response to the Shoelace signal when operating near the QCM resonance.
Jul 12 2012 05:38:49:700PM	1120712028	Theodore Golfinopoulos	Goal: Increase q95 to >=4.8 so that ASP has a better chance of seeing mode, per last run. Frequency step for Shoelace, coarsely following the QCM trajectory. Result: got it, even though we had a disruption on previous shot. See a signal on BP_AB_TOP when the Shoelace is at the higher frequency, which we didn't see before. Hard to say whether ASP in dwell mode sees Shoelace. H-mode transitions out due to aggressive field scan but recovers.
Jul 12 2012 05:38:39:737PM	1120712029	Theodore Golfinopoulos	Goal: ASP scan with high q95 (>=4.8) so that increase the chance that we see a signal on the ASP. Result: got a full-length shot. Got two ASP scans, and do see the Shoelace on the ASP signal. Again, H-mode transitions out due to aggressive field scan but recovers. Got two H-modes. Doesn't look like PCI sees Shoelace. Last shot of the day - thanks, everyone.

Physics Operator Comments
Jul 12 2012 09:08:45:503AM	1120712001	Jerry Hughes	Shot 1. Load from 1120620009. Active segment is Seg3, starting at t=0.080s. Want to modify Bt trace to ramp from 3.5T to 2.5T over 0.6--1.0s, then from 2.5T to 3.5T over 1.1--1.5s In seg3, set TF flat at -93500A until 0.6s. Ramp to -66785A at 1.0s, hold flat until 1.1s. Ramp to -93500A at 1.5s, hold flat until 1.8s. In seg1, reduce PG4 pre-puff from 23ms to 21ms. Load at 12-Jul-2012 06:55:36.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Full length plasma. No H-mode.
Jul 12 2012 09:16:22:533AM	1120712002	Jerry Hughes	Shot 2 Changes: In seg3, change minimum in TF current from -66785A to -63725A. Change Ip from -700000A to -750000A. Load at 12-Jul-2012 09:12:43.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle. Breakdown looks late.
Jul 12 2012 09:25:37:313AM	1120712003	Jerry Hughes	Shot 3. Changes: In seg1, increase PG4 pre-puff from 21ms to 26ms. In seg3, slow down CLEARIN ramp at 0.5s to try to prevent the plasma from slamming into the inner wall between 0.5 and 0.6s. (as on shot 1) Load at 12-Jul-2012 09:25:25.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result:
Jul 12 2012 09:50:21:960AM	1120712004	Jerry Hughes	Shot 4. Changes: In seg1, change IC_EF4U from -1310A to -1320A. Also change PG4 pre-puff form 26ms to 30ms. Load at 12-Jul-2012 09:37:55.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle again. Bz looks better, Breakdown still late, pressure appears low. However, Wolfe recommends: "try dropping to 18msec. It's choking"
Jul 12 2012 09:59:16:820AM	1120712005	Jerry Hughes	Shot 5 Change: Go other way with PG4. Set pre-puff to 18ms. Load at 12-Jul-2012 09:52:10.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Full length plasma. Wolfe was correct about startup. I hadn't realized the ratiomatic was uncalibrated.
Jul 12 2012 10:07:19:867AM	1120712006	Jerry Hughes	Shot 6 Changes: In seg3 get Ip up to target faster, perhaps get OH1 cross-over to occur earlier. Also make some adjustments to CLEARIN and RCUR to try to keep LGAP large around 0.5s. Load at 12-Jul-2012 10:06:28.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result:
Jul 12 2012 10:25:47:847AM	1120712007	Jerry Hughes	Shot 7 Changes: In seg1, reduce PG4 pre-puff from 18 to 17ms. Load at 12-Jul-2012 10:19:23.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma, full length. No H-mode
Jul 12 2012 10:42:22:640AM	1120712008	Jerry Hughes	Shot 8 Changes: Try to move equilibrium closer to that on 1000928022. In seg3, decrease ZXL from 0.00 to -0.010. Decrease RXL by approximately 1cm Also, to increase RGAP, decrease RCUR from 0.668 to 0.665. Load at 12-Jul-2012 10:34:54.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle. Too much gas again, I presume. G-side reads 0.023 mtorr. Shot 7 broke down at 0.021.
Jul 12 2012 10:57:09:330AM	1120712009	Jerry Hughes	Shot 9. Change: In seg1, reduce PG4 pre-puff from 17ms to 16ms. Load at 12-Jul-2012 10:43:32.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Full length plasma. H-mode, early in BT ramp
Jul 12 2012 11:01:40:220AM	1120712010	Jerry Hughes	Shot 10 Change: In seg3, raise nl04 from 5e19 to 7e19. Load at 12-Jul-2012 11:01:26.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done result:
Jul 12 2012 11:27:03:707AM	1120712011	Jerry Hughes	Shot 11. Changes: Advance entire PG3 pulse in seg 1 by 0.01s, so that rise occurs at -0.02s instead of -0.01s. (per Wolfe's suggestion) In seg1, change IC_EF4U from -1320A to -1310A. Load at 12-Jul-2012 11:14:13.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Long H-mode, followed by a disruption at 1.23s.
Jul 12 2012 11:41:00:623AM	1120712012	Jerry Hughes	Shot 12. Changes: In seg 3, increasing RXL by about 1cm in flattop, to try to get strike closer to the vertical plate. In seg1, decrease PG4 pre-puff to 14ms from 16ms. Load at 12-Jul-2012 11:30:07.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle. Let's call it a post-disruption fizzle and not change anything.
Jul 12 2012 11:47:52:187AM	1120712013	Jerry Hughes	Shot 13 No PO changes Result: Full length plasma Evacuating building due to gas leak.
Jul 12 2012 01:15:57:113PM	1120712014	Jerry Hughes	Building is open again, and we are getting back to work. Shot 14. Changes: In seg3, advance the TF waggle by 200ms. Load at 12-Jul-2012 13:07:32.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle
Jul 12 2012 01:24:55:923PM	1120712015	Jerry Hughes	Shot 15. No PO changes Result: Plasma full length. No H-mode
Jul 12 2012 01:43:13:407PM	1120712016	Jerry Hughes	Shot 16. Changes: Matt Reinke is requesting an Ar puff in ramp-down. Have B-side lower enabled. In seg3 turn on PG1 at 1.6s for 30ms. Now delay TF waggle 200ms so that it matches that on shot 13. Also, increase ZXU by about 1cm, in order to reduce elongation of crown. Load at 12-Jul-2012 13:37:05.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma with ohmic H-mode. The H-L transition leads to a disruption, as it did on shot 11.
Jul 12 2012 02:00:32:430PM	1120712017	Jerry Hughes	Shot 17 Changes: In seg3, increase ZXU by about 2cm, to try to increase SSEP more, and thus reduce the height of the crown. Also, ramp Bt back up faster. Program in a step in TF to -150000A at 1.101s. Added 0.001 offset of BR0 in seg1 Load at 12-Jul-2012 13:55:04.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle
Jul 12 2012 02:16:58:300PM	1120712018	Jerry Hughes	Shot 18. No PO changes. Result: Plasma, full length. H-mode. Startup looks miraculously better. Much less carbon around. Step in TF program results in a Bt ramp of about 7 or 8 T/s
Jul 12 2012 02:29:00:560PM	1120712019	Jerry Hughes	Shot 19 Changes: Change the Bt waggle to two steps in programming. Made last step to -114250A to try to get a steady EDA with QCM. Load at 12-Jul-2012 14:21:53.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma, full length. ohmic H-mode. Injection at 1.26s?
Jul 12 2012 02:45:27:523PM	1120712020	Jerry Hughes	Shot 20. Changes: Advance whole TF program 200ms, to try to get more H-mode. Load at 12-Jul-2012 14:36:43.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Full length plasmas. H-mode triggered at 0.954, then lost due to an injection at 1s. Amazingly, the H-mode comes back after that and saturates nicely. Looks like a clear ITB.
Jul 12 2012 03:01:36:720PM	1120712021	Jerry Hughes	Shot 21. No PO changes. ASP will plunge into H-mode if it is there. Result: Great shot. Long ohmic EDA H-mode with ITB.
Jul 12 2012 03:19:25:867PM	1120712022	Jerry Hughes	Waiting for SL to program his shoelace waveform. Shot 22 Changes: Increase PG1 puff in Seg3 from 30 to 40ms. Load at 12-Jul-2012 15:10:32.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Good full length plasma with ohmic H-mode. Very similar to shot 21.
Jul 12 2012 05:22:15:993PM	1120712023	Jerry Hughes	Shot 23 Change: Inrease flattop RCUR in seg3 from 0.665 to 0.667. Load at 12-Jul-2012 15:28:58.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Full length plasma with ohmic H-mode
Jul 12 2012 03:54:48:403PM	1120712024	Jerry Hughes	Shot --- t_L-H 20 ---- 0.9547 21 ---- 0.9896 23 ---- 0.9949 24 ---- 0.9259
Jul 12 2012 05:21:38:397PM	1120712024	Jerry Hughes	Shot 24 Change: Decrease RCUR at end of flattop from 0.667 to 0.666m Load at 12-Jul-2012 15:43:51.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Full length plasma with EDA H-mode
Jul 12 2012 04:22:48:827PM	1120712025	Jerry Hughes	Shot 25. No PO changes Result: Full length plasma with ohmic EDA H-mode, ITB.
Jul 12 2012 04:22:59:887PM	1120712026	Jerry Hughes	Shot 26. No PO changes Result: Full length plasma with ohmic EDA H-mode, ITB.
Jul 12 2012 04:36:01:507PM	1120712027	Jerry Hughes	Shot 27. No PO changes Result: Ohmic H-mode, with disruption following the H-->L
Jul 12 2012 04:55:57:020PM	1120712028	Jerry Hughes	Shot 28. Change: Go to higher field in H-mode. Have TF program at 0.9s step to -135690A instead of -114250A. Load at 12-Jul-2012 16:42:22.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma, with H-modes.
Jul 12 2012 05:06:55:233PM	1120712029	Jerry Hughes	Shot 29 No PO changes. Result: The classic 5 o'clock full length discharge, with ohmic H-modes. EOR

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:58:40:423AM	Plasma	Ok
2	09:13:05:550AM	Plasma	Ok
3	09:26:00:510AM	Plasma	Ok
4	09:39:58:173AM	Plasma	Ok
5	09:52:40:900AM	Plasma	Ok
6	10:06:57:627AM	Plasma	Ok
7	10:19:48:860AM	Plasma	Ok
8	10:35:33:383AM	Plasma	Ok
9	10:48:00:297AM	Plasma	Ok
10	11:01:59:177AM	Plasma	Ok
11	11:14:42:647AM	Plasma	Ok
12	11:30:37:353AM	Plasma	Ok
13	11:43:16:387AM	Plasma	Ok
14	01:07:59:777PM	Plasma	Ok
15	01:20:45:200PM	Plasma	Ok
16	01:37:35:920PM	Plasma	Ok
17	01:55:37:917PM	Plasma	Ok
18	02:08:12:640PM	Plasma	Ok
19	02:22:31:390PM	Plasma	Ok
20	02:37:23:810PM	Plasma	Ok
21	02:50:10:037PM	Plasma	Ok
22	03:15:57:620PM	Plasma	Ok
23	03:32:04:500PM	Plasma	Ok
24	03:45:27:960PM	Plasma	Ok
25	04:02:58:793PM	Plasma	Ok
26	04:18:56:090PM	Plasma	Ok
27	04:31:53:983PM	Plasma	Ok
28	04:45:36:980PM	Plasma	Ok
29	04:58:52:727PM	Plasma	Ok

System Availability

Jul 12 2012 08:58:16:970AM

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 one 50Hz laser, precise density calibration still required. May 9 2012 03:12:32:050PM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:51:363PM (jwhughes) 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