| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Theodore Golfinopoulos |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Andy Pfeiffer,Gary Dekow,Bill Byford |
| Engineering Operator Run Comment |
| run the Shoelace antenna SL Golfinopoulos PO Earl Marmar |
| Session Leader Plans |
| Entered: Aug 13 2012 03:01:24:873PM |
| Author: Theodore Golfinopoulos |
| Goals:
run the Shoelace antenna into plasmas with lower q95 and small RGAP for optimal coupling. Attempt to map out plasma response using fast frequency sweeping and synchronous detection method. Then, using new phase locked loop circuit, attempt to drive antenna in or out of phase with intrinsic QCM; look for effect. Reference Shots: 1120712016 (better q95), 1120712018 (better startup), 1120712021 Ip: ~700 kA Bt: for most shots, Bt ramps down from 3.5 to 2.5 T, then back up to 3.5 or 4 T. May do some shots at higher field. No ICRF No LH No DNB Boronization: Overnight Diagnostics: Required: Mirnov coils, A-port scanning probe with mirror probe head, PCI, differential TCI, reflectometer, Edge Thompson. Desired: HIREX Sr, CXRS, calcium blowoff, edge reflectometer Shot Plan: 1. (3-4 shots) Establish ohmic EDA H-modes, optimize shape and gap (1.a) (1 shot) Try to establish long EDA H-mode based on reference shots from 1120712 (1.b) (1-2 shots) Modify triangularity, shape to try to make plasma more conformal to the antenna. Run Shoelace with triangle-wave FM during scan. (1.c) (1 shot) During EDA phase in shot, and with optimized shape, ramp RGAP down dynamically until the plasma is limited on the outer limiter. Determine the minimal RGAP for which EDA may be sustained. Run Shoelace with triangle-wave FM during scan. 2. (3-4 shots) Dynamic RGAP scan with constant shape; try to pick off radial decay rate using GH limiter tile Mirnov coils. Run for three values of q95: 3.5, 4.5, 5.5. Shoelace: no AM, but use FM as follows: run a square-wave frequency modulation at 500 Hz. The lower frequency should track QCM ("on resonance"); the upper frequency should be fixed at 200 kHz ("off resonance"). Since the Shoelace is dominant in the Mirnov spectra at 200 kHz, data at this frequency will help us to interpret the Shoelace response. Moreover, since 200 kHz is off the QCM peak, the FM plays the same role as AM with respect to determining whether the Shoelace has an effect on the intrinsic mode. 3. (6-8 shots) q -scan (3.a) (1 shot) Calibration shot: run QCM at 200 kHz (out of the QCM band and dominant in the Mirnov spectrum), fixed frequency and no AM. Scan q95 dynamically up to 5 in latter part of discharge (EDA phase). Examine whether phase of transfer function reveals cell structure of antenna and field-line mapping. (3.b) b. (5 shots) Vary q95 shot-to-shot with the following final flattop values: [2.7, 3.0, 3.3, 3.6, 3.9]. Run antenna using FM, 30 kHz frequency excursions, ±15 kHz about moving center frequency, in 10 triangle cycles. QCM may be suppressed at lower q. Do not use AM. 12-16 (CELL ACCESS: ENGAGE PHASE LOCKED LOOP) 4. (2 shots) ASP scans with Mirror probe - q95 � 5.0, small RGAP (3 mm or less). Make sure calcium blowoff system is running. (4.a) Shoelace operating with 500 Hz AM (4.b) Shoelace at full power and no AM, but turned off at 1.35 s; synchronize probe plunge with Shoelace edge. 5. (6-12 shots) Dynamic q-scan to suppress intrinsic QCM - As usual, ramp toroidal field down to gain access to H-mode, then up to gain access to EDA H-mode. But then, ramp down again to reduce q95 so as to suppress the QCM. Then, attempt to prolong QCM with Shoelace. Use phase locked loop to track intrinsic QCM in frequency and phase. ***Will need a 2-minute cell access before parts (a), (b), (d), (e), and (f).*** (5.a) (1-2 shots) Scan q95 dynamically in latter part of current flattop from 4 to 3 or lower to suppress QCM; operate Shoelace antenna in receiver mode (5.b) (1-2 shots) Repeat; now, energize shoelace antenna; do not scan frequency or employ amplitude modulation; run with phase locked loop syncing to intrinsic QCM signal on PCI Channel 31 and controlling Shoelace frequency+phase. Turn antenna off at 1.45 s, or otherwise sufficiently after QCM was suppressed in Part 5 (a), to determine whether edge in Shoelace power has any effect on fluctuations or global behavior. Synchronize an ASP scan with edge in Shoelace power. (5.c) (1-2 shots) Repeat Part (b) with +0 degree phasing, but now, run antenna to 1.5 s, and use 500 Hz AM. (5.d) (1-2 shots) Repeat Part (b), but switch phase to +90 degrees; no AM; turn off at 1.45 s, as before (5.e) (1-2 shots) Repeat Part (b), but switch PLL output phase to -90 degrees; no AM; turn off at 1.45 s, as before (5.f) (1-2 shots) Repeat Part (b), but switch PLL output phase to +180 degrees; no AM; turn off at 1.45 s, as before If time remains... 6. (4 shots) Shape scan (6.a) (4 shots) reduce triangularity. Low q95 (�3.5). QCM may be suppressed. Run antenna with triangular-wave FM to cross QCM frequency, as in q95-scan. i. Ramp triangularity dynamically during EDA phase, with final value of δ= 0.2. ii. Run trying to fixed final triangularity at δ = [0.4, 0.3, 0.2] Back-up shots (1-2 shots) Repeat plasma from 5.b; scan frequency in triangle wave to identify poles in response |
| Physics Operators Plans |
| Entered: Aug 13 2012 05:12:29:630PM |
| Author: Earl Marmar |
| -----------------
Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120712016 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) ------------------------------ post-boronization: gas and pressure: He at 5e-5 Torr sweep: 44/45/103 cm scan: 20/120 s Duration: 2 hours --------------------------- PO setup: ---------------------------- Load from 1120712016, with startup from 1120712018 Seg01 is a low-field startup Seg03 is the active segment, start at 0.08s, early divert |
| Session Leader Summaries |
| Entered: Aug 14 2012 06:51:55:883PM |
| Author: Theodore Golfinopoulos |
| MP719 - Shoelace Antenna Operation in EDA H-mode Plasmas
The primary goals of today's run were: 0. Optimize plasma for Shoelace operation in terms of RGAP, q95, and shaping 1. Perform a scan of q95 while mapping out the plasma's response to the antenna using synchronous detection 2. Attempt to have an observable effect on the intrinsic QCM with the help of the new phase locked loop circuit. 3. Calibration shots for QCM - identify phase progression on Mirnov coil pickup of Shoelace signal as field lines map by during dynamic q-scan. Also, pull off radial decay rate of antenna signal on Mirnov's with RGAP scan. Additional goals included: A. Run the A-port scanning probe as mirror probe with radial head; characterize QCM and measure width of mode layer B. Extract radial decay rate of QCM from Mirnov coils with RGAP scan The results were as follows: 0. Optimize plasma for Shoelace: we managed to squeeze RGAP to 1 mm (according to EFIT) without killing the H-mode, and we ran at low q95 (~3, above and below) - this gave good results 1. We had originally intended 5 q95 data points. We got 5 (Shots 16, 18, 19, 20, 21), though we didn't quite cover the full range of q95 we had intended. 2. We ran the antenna with the PLL engaged and locked to a QCM on 6 shots. On one of these, the lock was only for 20 ms; the others did better, and the current throughput was higher than we expected on a few (e.g. Shot 28). No obvious huge effect on QCM, but it will take time and more careful analysis to flesh this out. We got 3/4 phasings, counting the shots with the 20 ms PLL lock: 0, -90, and 180 3. We got in our calibration shots with dynamic q and RGAP scans. A. We got a number of good ASP scans and good data, accompanied by good data from GPI. The ASP caused some back transitions B. k_perp from Mirnov coils and RGAP scan - we got the shot (Shots 14 and 15) - still have to process the data. One bit of big news on the day is that we saw a clear Shoelace signal on both PCI (many channels on both digitizers) and polarimetry (Chord 3) (see, e.g. Shots 19, 20, and 21 - other shots, also, showed the signal). This is the first time we've seen a Shoelace signal on anything other than a magnetic fluctuations diagnostic. We unplugged all connections between our rack and PCI through the PLL to make sure that the observation was not a spurious signal leaking from our control circuitry. This suggests that our antenna drove a density perturbation, in addition to a magnetic perturbation. We'll be doing more analysis. On the to-do list: 1. see if we can't pick out whether the Shoelace affected the intrinsic QCM in some way 2. use synchronous detection to study how parameters of driven resonances depend on q95 3. other things Thanks very much to Phys Op, Earl Marmar, and as well as the whole crew, for a great run, and special thank you's to Jim Irby on polarimetry, Jim Terry on GPI, Chi Gau on Hirex, Evan Davis on PCI, and especially Brian LaBombard on ASP and everything else. Hope I didn't leave anyone out - apologies if I did. Shots with PLL engaged and Shoelace running off of PCI feedback: 4: 0 degree phasing, no AM 10: 0 degree phasing, no AM 28: 0 degree phasing, 10 Hz AM 29: 0 degree phasing, 10 Hz AM 30: -90 degree phasing, 10 Hz AM 31: 180 degree phasing, 10 Hz AM (PLL was only locked for 20 ms) q95 Scan Shots for Synchronous Detection Parametric Study: 16 - 17 - 18 - 19 - 20 - 21 - (On Shots 2-3, 5-9 (0 degree phasing) and 32 (90 degree phasing) - PLL was engaged but did not lock to a/the QCM) |
| Physics Operator Summaries |
| Entered: Aug 14 2012 05:21:33:137PM |
| Author: Earl Marmar |
| The machine ran well today. Startup was reliable, and we had no problems with hard x-rays. One shot was lost to a power supply problem, and we had one early disruption. There was a PF power supply issue (breaker/crowbar) at the end of shot 30.
The B-main gas valve was not working at the start of the run. This was discovered after shot 5, and it was found that the piezo coax cable had been disconnected. All shots today used low field (3.5 T) startup, segment switch at 80 ms, and early divert. Most shots had ohmic H-modes, some with right gaps as small as 1 mm (from EFIT). Scorecard: Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result | 01 0.000 0.002 Test | 02 1.938 0.744 Plasma | | 03 1.941 0.746 Plasma | 04 1.363 0.754 Plasma | | 05 1.962 0.751 Plasma | 06 1.262 0.753 Plasma | | 07 1.964 0.750 Plasma | 08 1.932 0.748 Plasma | | 09 1.708 0.746 Plasma | 10 1.782 0.742 Plasma | | 11 1.642 0.743 Plasma | 12 0.000 0.030 Dud | | 13 1.553 0.743 Plasma | 14 1.927 0.745 Plasma | | 15 1.743 0.740 Plasma | 16 1.722 0.740 Plasma | | 17 1.684 0.736 Plasma | 18 1.926 0.738 Plasma | | 19 1.576 0.742 Plasma | 20 1.575 0.742 Plasma | | 21 1.682 0.741 Plasma | 22 1.913 0.736 Plasma | | 23 0.425 0.775 Plasma | 24 1.921 0.737 Plasma | | 25 1.576 0.742 Plasma | 26 1.916 0.743 Plasma | | 27 1.664 0.740 Plasma | 28 1.642 0.737 Plasma | | 29 1.728 0.744 Plasma | 30 1.642 0.741 Plasma | | 31 1.652 0.741 Plasma | 32 1.650 0.745 Plasma | Date 1120814: 32 shots. 30 plasmas. 0 fizzles. 1 dud. 1 test. 0 System Error. (Plasma = Ip gt 60.0 kA Dud = H_alpha lt 0.10 V) Total plasma duration: 50.61 s (exceeding -100 kA) |
| Session Leader Comments | |||
| Aug 14 2012 09:27:23:243AM | 1120814002 | Theodore Golfinopoulos | Goal: Get EDA H-mode
Result: no H-mode on this shot. Shoelace on frequency sweep. shoelace freq=10 wave cycles at +-25 kHz. Shoelace matching network things frequency is constant, which it is not. Looks like there is a problem. We'll see what it does on the next shot. |
| Aug 14 2012 09:58:06:393AM | 1120814003 | Theodore Golfinopoulos | No H-mode
still issues with matching network Went in and rebooted matching network, gave it input from function generator. LEDs came on as normal. Ran test shot in 1120814900. Same behavior. Master Control Board now giving readout of series, parallel, and clock numbers. Brian noticed that switching errors coincide with steps in VCO frequency output (measured f). Next: try to get QCM. Diagnose Shoelace power system issues as we go. |
| Aug 14 2012 10:50:22:817AM | 1120814004 | Theodore Golfinopoulos | Got H-mode
Looks like there was a QCM. And the PLL locked to it. With the antenna on. :) We'll have to see later what the result was. When the PLL took over, SRC_2 seemd to drop output, perhaps tripping. SRC_1 seemed to maintain power, maybe happy with level of reflected power (especially after SRC_2 trips). Might be good to drop Shoelace power demand to avoid a trip - might get more power that way. |
| Aug 14 2012 10:51:04:213AM | 1120814005 | Theodore Golfinopoulos | Low density - gas problem.
Turned out there was a disconnect in gas system. Fixed during cell access. Thanks, Tommy. |
| Aug 14 2012 10:47:44:850AM | 1120814006 | Theodore Golfinopoulos | Got H-Mode, but not EDA
Gas seemed okay. Still odd behavior from VCO. Next: Try skipping the field ramp-down, since it doesn't seem to help us get into H-mode (we get H-mode before substantial rampdown), and may help us be more EDA-ish. Back off Shoelace power a bit more. |
| Aug 14 2012 10:49:59:540AM | 1120814006 | Theodore Golfinopoulos | Got H-mode
Looks like there was a QCM. And the PLL locked to it. With the antenna on. :) We'll have to see later what the result was. When the PLL took over, SRC_2 seemd to drop output, perhaps tripping. SRC_1 seemed to maintain power, maybe happy with level of reflected power (especially after SRC_2 trips). Might be good to drop Shoelace power demand to avoid a trip - might get more power that way. |
| Aug 14 2012 11:01:27:293AM | 1120814007 | Theodore Golfinopoulos | Got short H-mode, not EDA. Impurity injection seems to kill H-mode.
Next: Keep hunting for EDA H-mode. Try to keep strike point in slot; otherwise, keep the same. |
| Aug 14 2012 11:16:08:223AM | 1120814008 | Theodore Golfinopoulos | Got two H-modes - first is ELM-free non-EDA, second is EDA. There is a QCM in the second H-mode, but the PLL doesn't lock to it.
Next: Try raising density a bit. Also, fix Shoelace frequency at 75 kHz to see if we can get a good tune. |
| Aug 14 2012 11:31:47:437AM | 1120814008 | Theodore Golfinopoulos | Got a long EDA H-mode. QCM is higher frequency than on Shot 4, and less coherent - QCM_DETECT does not register a lock.
Next: push density up 10 % and drop field 10 %. Also, target Shoelace antenna to sweep through QCM band from last shot. |
| Aug 14 2012 11:48:33:280AM | 1120814010 | Theodore Golfinopoulos | Got another long EDA H-mode.
A little stronger this time, and QCM_DETECT went hight twice. Still doesn't look quite as nice as Shot 4. Cell access after shot for LH people. I went in, also, and pulled out QCM Sync inputs to VCO. Next: proceed with Part 1 of the MP. Ramp RGAP down to zero to see how close we can get plasma to antenna before we extinguish H-mode. |
| Aug 14 2012 12:01:18:780PM | 1120814011 | Theodore Golfinopoulos | Got long EDA. Small RGAP didn't seem to kill H-mode, though came close.
Shaping seems okay. Next: try to make RGAP even smaller until we lose H-mode. Drop Shoelace triangle sweep so that it has a mean value of 110 kHz with +-20 kHz. |
| Aug 23 2012 02:18:00:243PM | 1120814012 | Theodore Golfinopoulos | Fizzle.
You can see the Shoelace signal in the PCI_28 spectrogram if you crank the gain up to 30E-17, and in PCI_16 if you crank it up to 300E-17. So be aware. May be leakage from phase locked loop circuit. But you can't see it in polarimetry at all. Next: Try again. |
| Aug 14 2012 12:37:34:890PM | 1120814013 | Theodore Golfinopoulos | EFIT reports RGAP goes to zero. EDA H-mode goes out around 1.4 s.
Looks like we found minimum RGAP. Next: Try Part 2 - do a fast square-wave frequency modulation and RGAP scan. Square wave runs from a flat high value of 200 kHz (off resonance) to a low value that follows the peak in the QCM frequency from Shot 13. Try to extract k_perp from gap scan, and get some calibration for Shoelace when it is running at high frequency. |
| Aug 14 2012 01:05:24:523PM | 1120814015 | Theodore Golfinopoulos | Had RGAP reach its minimum value at 0.9 s, based on value for Shot 14 at 1.2 s. We got the H-mode, so we'll stay with this shot, having found "optimal" RGAP programming.
Next: Allow Ar, NINJA puffs. Perform triangle frequency sweep on Shoelace to start with Part 3 of run plan. Use QCM center frequency from Shot 13 to pick moving center of triangle frequency sweep. Use +-25 kHz on frequency excursions because QCM extent seems wide. |
| Aug 14 2012 01:31:45:750PM | 1120814016 | Theodore Golfinopoulos | Ar didn't puff at 0.3 s - leftover programming for 1.6 s puff.
Got 3 weak H-modes Next: puff Ar at 0.3 s |
| Aug 14 2012 01:30:44:843PM | 1120814017 | Theodore Golfinopoulos | Goal: Part 3 of MP. Try q95 of 3.9 by increasing toroidal field by 13 %.
Run Shoelace with triangle FM, modulation frequency = 10 Hz, +-25 kHz. Don't follow center frequency of previous QCM, but use a fixed center frequency of 120 kHz. Cleaner. This time, puff Ar at 0.3 s (last shot, didn't puff until 1.6 s). q95~=3.7-3.75 - close to our target. Result: No H-mode on this shot. May be due to Ar puff (radiated power is up). Next: Move Ar puff back to 1.6 s and try again. |
| Aug 14 2012 02:05:13:770PM | 1120814018 | Theodore Golfinopoulos | Repeat of Shot 17 without Ar puff. Got H-mode back. Weak QCM.
Next: go down to q95 around 3.1-3.2 for next point on scan. |
| Aug 14 2012 02:02:24:663PM | 1120814019 | Theodore Golfinopoulos | Nice QCM on this discharge.
See Shoelace signal on PCI Channel 30, for example, but not on Channel 16. Had cell access and disconnected PLL circuit from PCI to be sure that what we're seeing on PCI is not leakage from our system through the PLL. Next: Drop lower toroidal field value on latter half of flattop to 2.5 T to march on with scan of q95. Look for Shoelace on PCI again. |
| Aug 14 2012 02:39:16:323PM | 1120814020 | Theodore Golfinopoulos | See Shoelace signal on PCI, even on PCI Channel 16.
Cell access to disconnect PLL outputs totally. Now, PCI rack should be totally isolated from magnetics rack. Next: try a little higher value of field |
| Aug 14 2012 03:07:33:773PM | 1120814021 | Theodore Golfinopoulos | PCI rack should be totally isolated from magnetics rack, since PLL outputs were disconnected before shot.
Still see Shoelace signal on PCI, even on Channel 16. Jim Irby spotted the Shoelace signal on Chord 3 of the polarimeter. Next: Part 3.a - calibration shot. Leave antenna at 150 kHz fixed, no FM or AM. Target toroidal field of 5.4 T and see how high q95 we can get. Look for cell structure of antenna revealed in Mirnov coil signal as phase progression in transfer function. |
| Aug 14 2012 02:53:38:020PM | 1120814022 | Theodore Golfinopoulos | Calibration shot - Part 3.a of MP. Fixed Shoelace frequency of 150 kHz. Fixed amplitude.
Result: toroidal field made it up to 5.4 T - we got our q95 sweep. Didn't get H-mode on this shot. Next: Try ASP scan with 500 Hz AM on Shoelace antenna, fixed frequency of 150 kHz. See whether we see any Shoelace signal on ASP. |
| Aug 14 2012 03:33:57:570PM | 1120814023 | Theodore Golfinopoulos | Disruption.
Next: try again. |
| Aug 14 2012 03:33:15:303PM | 1120814024 | Theodore Golfinopoulos | Run Shoelace at 150 kHz fixed with 500 Hz AM - look for signature on ASP. Run at same high Q ramp for better mapping to ASP.
Result: got the plasma we wanted, and a small H-mode. Next: ASP Piggyback - try to measure width of QCM layer with ASP. |
| Aug 14 2012 03:31:15:770PM | 1120814025 | Theodore Golfinopoulos | Repeat of Shot 19.
ASP scan, preparing for deep scan penetrating mode layer. Got good, long QCM again. Shoelace running on triangle wave FM, with +-20 kHz excursions about a fixed center of 110 kHz. Next: same plasma, deeper ASP scan to penetrate mode. Shoelace at 110 kHz fixed, 10 Hz AM. |
| Aug 14 2012 03:45:46:090PM | 1120814026 | Theodore Golfinopoulos | Deep ASP scan.
GPI didn't fire at right time, so going try again. Cell access - engaged PLL again. Next: same plasma. NINJA will puff at different time. ASP will scan deep. PLL engaged - Shoelace may go under PLL control. Leave 10 Hz AM. |
| Aug 14 2012 03:59:19:223PM | 1120814027 | Theodore Golfinopoulos | PLL was not engaged at magnetics rack.
ASP timing didn't hit QCM. Next: ASP timing is going to change (and GPI with it). PLL now engaged. Shoelace at 10 Hz AM. Same plasma. |
| Aug 14 2012 04:14:08:843PM | 1120814028 | Theodore Golfinopoulos | Shoelace ran under PLL control during EDA. Got over 70 A into antenna, even when taking PLL input. Maybe AM helped.
ASP scanned. Next: reload Shot 21 - lower q95 Calcium blowoff engaged for impurity transport. Shoelace at 10 Hz AM, PLL control when QCM_DETECT is high, 100 kHz fixed freq when QCM_DETECT is low. Still have ASP scanning. |
| Aug 14 2012 04:26:18:263PM | 1120814029 | Theodore Golfinopoulos | QCM popped out, also went to lower frequency, and looks like our threshold of 83 kHz is biting us again.
Next: change Shoelace phasing to -90 degrees. Reload Shot 28 (itself based on Shot 19), which had higher QCM frequency, so maybe we will have cleaner output from Shoelace antenna. Same 10 Hz AM on Shoelace. |
| Aug 14 2012 04:39:37:523PM | 1120814030 | Theodore Golfinopoulos | -90 degree phasing on Shoelace.
Ran, but amplifier tripped shortly after PLL took over. Calcium injection may have killed QCM at 1.4 s. Crowbar - delay. Next: Back off on amplitude a bit - run at amp_wave_w=200 with 10 Hz AM. 180 degree Shoelace phasing. Turn of calcium injection. |
| Oct 10 2012 04:53:29:710PM | 1120814031 | Theodore Golfinopoulos | 180 degree Shoelace phasing.
Result: PLL only locked to QCM for 20 ms. Fortunately, the antenna was on during this period, but kind of weak. Next: 90 degree phasing. |
| Aug 14 2012 05:27:15:367PM | 1120814032 | Theodore Golfinopoulos | 90 degree phasing.
Result: PLL did not lock to the QCM at all during this shot. So we didn't get any feedback. Can still see the open-loop 100 kHz Shoelace signal on PCI for this and other shots. This was the last shot. Thanks, all. It was fun. Shoelace antenna has been changed to receiver mode in preparation for Ahmed Diallo's run tomorrow. |
| Physics Operator Comments | |||
| Aug 14 2012 09:15:22:207AM | 1120814002 | Earl Marmar | load from 1120712016
import segment 1 from 1120712018 into segment 1 plasma, full length no H-mode |
| Aug 14 2012 09:42:47:410AM | 1120814003 | Earl Marmar | nl_04 target to 6e19 (from 7e19)
plasma, full length no H-mode delay after this shot while Ted debugs hardware |
| Aug 14 2012 10:05:59:330AM | 1120814004 | Earl Marmar | decrease RXL to move the outer strike point down into the slot
plasma, disrupt at 1.36 s 2 ohmic H-modes (density rises throughout the H-modes) |
| Aug 14 2012 10:34:44:630AM | 1120814005 | Earl Marmar | nl_04 target to 7e19 (from 6e19)
plasma, full length no H-mode density is lower appears that B-main pulsed gas is not working (gets voltage, but no gas) engineers are looking into the issue valve cable was unplugged after reconnecting, test pulse gave gas |
| Aug 14 2012 10:43:43:957AM | 1120814006 | Earl Marmar | no dpcs changes
plasma, disrupt at 1.25 s 1 H-mode got gas from B-main |
| Aug 14 2012 10:59:24:750AM | 1120814007 | Earl Marmar | remove TF ramps in segment 3
plasma, full length 1 short H-mode, possibly ended by impurity injection |
| Aug 14 2012 11:12:44:573AM | 1120814008 | Earl Marmar | adjust RXL to try to keep the strike in the slot longer
also tweak ZXL after 1.3 seconds plasma, full length 2 H-modes, first ELM-free, second EDA startup looks ratty, nearly lost it |
| Aug 14 2012 11:34:18:157AM | 1120814009 | Earl Marmar | prefill puf to 16 ms (from 14 ms)
nl_04 target to 8e19 (from 7e19) plasma, disrupt in rampdown (0.5 MA) 1 long EDA-ish H-mode |
| Aug 14 2012 11:36:38:767AM | 1120814010 | Earl Marmar | nl_04 target to 8.9e19 (from 8e19)
TF rampdown 10% in segment 3 plasma, disrupt in rampdown (300 kA) 1 long EDA H-mode |
| Aug 14 2012 11:58:10:577AM | 1120814011 | Earl Marmar | ramp RCUR to increase by 3 mm between 1.0 and 1.5 s (shrink outer gap to ~0)
plasma, disrupt in rampdown (550 kA) 1 long EDA H-mode outer gap shrinks to about 1 mm at 1.5 s) |
| Aug 14 2012 12:06:48:660PM | 1120814012 | Earl Marmar | ramp RCUR to increase by 6 mm between 1.0 and 1.5 s (shrink outer gap to about minus 5 mm)
power supply dud, EF1U way out of whack |
| Aug 14 2012 12:35:48:300PM | 1120814013 | Earl Marmar | no additional DPCS changes
plasma, disrupt at start of ramp-down 1 long H-mode |
| Aug 14 2012 12:53:10:390PM | 1120814014 | Earl Marmar | no DPCS changes
plasma, full length 1 long H-mode |
| Aug 14 2012 01:02:13:497PM | 1120814015 | Earl Marmar | RCUR to 0.668 at 0.9s, then constant to 1.5 s
plasma, disrupt in rampdown (400 kA) 2 H-Modes |
| Aug 14 2012 01:15:01:953PM | 1120814016 | Earl Marmar | enable argon (B-side lower), PG1 on at 1.6 s
NINJA also on for this one plasma, disrupt in rampdown (400 kA) 3 H-Modes |
| Aug 14 2012 01:32:32:617PM | 1120814017 | Earl Marmar | argon (PG1) moved to open at 0.3 s, for 60 ms
raise TF by 13% after 0.9 s plasma, disrupt in rampdown (500 kA) no H-mode |
| Aug 14 2012 01:45:32:977PM | 1120814018 | Earl Marmar | argon (PG1) moved back to open at 1.6 s (60 ms width)
NINJA turned off plasma, full length 2 H-modes |
| Aug 14 2012 01:56:12:463PM | 1120814019 | Earl Marmar | decrease TF to 76.1 kA after 0.9 s
plasma, disrupt at start of rampdown 1 long H-mode |
| Aug 14 2012 02:19:34:500PM | 1120814020 | Earl Marmar | decrease TF to 65.83 kA after 0.9 s
plasma, disrupt at start of rampdown 1 long H-mode |
| Aug 14 2012 02:37:29:650PM | 1120814021 | Earl Marmar | decrease TF to 69.98 kA after 0.9 s
plasma, disrupt in rampdown (500 kA) 1 long H-mode |
| Aug 14 2012 02:58:59:487PM | 1120814022 | Earl Marmar | increase TF to 150 kA after 0.9 s
plasma, full length no H-Mode a couple of relatively large injections (probe plunges?) |
| Aug 14 2012 02:57:58:973PM | 1120814023 | Earl Marmar | no DPCS changes
plasma, early disruption looks like something fell in at 0.38 seconds |
| Aug 14 2012 03:30:34:187PM | 1120814024 | Earl Marmar | no DPCS changes
plasma, full length H-mode from 0.86 to 1.01 s |
| Aug 14 2012 03:28:35:620PM | 1120814025 | Earl Marmar | import segment 3 from 1120814019 into segment 3
plasma, disrupt early in rampdown 1 long H-mode |
| Aug 14 2012 04:01:00:953PM | 1120814026 | Earl Marmar | no DPCs changes
plasma, full length multiple H-modes, probe plunge at 1 s caused the first back-transition |
| Aug 14 2012 04:01:43:380PM | 1120814027 | Earl Marmar | no DPCs changes
plasma, disrupt in rampdown (500 kA) 2 h-modes |
| Aug 14 2012 04:08:56:833PM | 1120814028 | Earl Marmar | no DPCs changes
plasma, disrupt in rampdown (520 kA) 1 good H-mode |
| Aug 14 2012 04:17:13:880PM | 1120814029 | Earl Marmar | import segment 3 from 1120814021 into segment 3
plasma, disrupt in rampdown (400 kA) 2 H-modes |
| Aug 14 2012 04:35:08:217PM | 1120814030 | Earl Marmar | import segment 3 from 1120814028 into segment 3
plasma, disrupt in rampdown (530 kA) 2 H-modes, LBO Ca injection at 1.4 s appears to have caused the back-transition pf breaker(s) pulled around the time of the disruption |
| Aug 14 2012 05:03:33:130PM | 1120814031 | Earl Marmar | no dpcs changes
plasma, disrupt in rampdown (500 kA) 2 H-modes, back-transition at 1.2 seconds, following probe plunge |
| Aug 14 2012 05:18:35:203PM | 1120814032 | Earl Marmar | no dpcs changes
plasma, disrupt in rampdown (500 kA) 1 long H-mode |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:36:08:197AM | Test | Ok | Cycle test |
| 2 | 09:04:40:283AM | Plasma | Ok | |
| 3 | 09:20:59:670AM | Plasma | Ok | |
| 4 | 09:56:45:213AM | Plasma | Ok | |
| 5 | 10:11:27:780AM | Plasma | Ok | |
| 6 | 10:35:08:317AM | Plasma | Ok | |
| 7 | 10:48:40:700AM | Plasma | Ok | |
| 8 | 11:01:36:130AM | Plasma | Ok | |
| 9 | 11:15:49:227AM | Plasma | Ok | |
| 10 | 11:31:49:377AM | Plasma | Ok | |
| 11 | 11:48:23:183AM | Plasma | Ok | |
| 12 | 12:00:43:717PM | Plasma | Bad | EF1 Commutation Problem |
| 13 | 12:22:42:690PM | Plasma | Ok | |
| 14 | 12:35:10:833PM | Plasma | Ok | |
| 15 | 12:50:33:087PM | Plasma | Ok | |
| 16 | 01:03:14:147PM | Plasma | Ok | |
| 17 | 01:22:45:890PM | Plasma | Ok | |
| 18 | 01:35:10:207PM | Plasma | Ok | |
| 19 | 01:47:30:253PM | Plasma | Ok | |
| 20 | 02:08:10:663PM | Plasma | Ok | |
| 21 | 02:24:51:357PM | Plasma | Ok | |
| 22 | 02:37:25:827PM | Plasma | Ok | |
| 23 | 02:52:08:267PM | Plasma | Ok | |
| 24 | 03:04:39:373PM | Plasma | Ok | |
| 25 | 03:18:53:447PM | Plasma | Ok | |
| 26 | 03:31:38:983PM | Plasma | Ok | |
| 27 | 03:45:24:057PM | Plasma | Ok | |
| 28 | 03:59:51:483PM | Plasma | Ok | |
| 29 | 04:12:15:520PM | Plasma | Ok | |
| 30 | 04:27:33:150PM | Plasma | Ok | |
| 31 | 04:56:35:200PM | Plasma | Ok | |
| 32 | 05:09:01:037PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Aug 14 2012 08:35:48:917AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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