| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Theodore Golfinopoulos |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Bill Parkin,Bill Byford |
| Engineering Operator Run Comment |
| MP298 and Commissioning of new QCM antenna Session leader: T. Golfinopou |
| Session Leader Plans |
| Entered: May 2 2012 07:01:11:743PM |
| Author: Theodore Golfinopoulos |
| The mission of the run is a dress rehearsal of the Shoelace antenna experiments. Try to optimize matching network lookup tables at high power and current. Look for signals on fluctuation diagnostics. When possible, try to get plasma close to conditions for first Shoelace physics runs (e.g. ohmic EDA H-mode, low-field). |
| Physics Operators Plans |
| Entered: May 1 2012 04:46:43:243PM |
| Author: Robert Granetz |
Engineering setup for Wednesday 2012/05/02
MP298 and Commissioning of new QCM antenna
Session leader: T. Golfinopoulos
Physics operator: R. Granetz
Overnight: normal ECDC in D2 and 60 C bake.
Run will start at 09:00 and end at 17:00
Power systems as on: 1120501032 (0.8 MA, 5.5 T, 0.9e20 m-2, LSN)
A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Hybrid enabled (standard
configuration)
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 H-bottom with 15 psi D2 Hybrid DISABLED (PG5)
leave B-div as is Hybrid DISABLED (PG6)
leave H-div as is Hybrid DISABLED (PG7)
leave NINJA as is DISABLED
Enable the following gate valves and shutters, assuming no vacuum problems:
ECE, VUV, Z-bolo, HIREX-Sr, B-spectrometer GV, Xeus, LoWEUS
Torvac setup: keep gate valves open during pulse
Specific diagnostics: QCM antenna, fluctuation diagnostics
Desirable diagnostics:
------------------------------------------------------------------------------
Boronization: no
Overnight ECDC: yes, D2
Impurity injector: no
ICRF: only after t=1.3 s
LH: no
DNB: no
Cryopump: no
------------------------------------------------------------------------------
Run plan: Run ohmic plasmas (ICRF is okay after t=1.3 s) with small right
gap. Perform an outer gap scan for part of the run.
|
| Session Leader Summaries |
| Entered: May 2 2012 06:58:54:653PM |
| Author: Theodore Golfinopoulos |
| The mission of the run was a dress rehearsal of the Shoelace antenna experiments.
At the start of the day, had some issues with voltage measurement on source-side of transformer. Finally localized the problem to the transformer on Shot 10; swapped the unit and the bug went away. Tried 5 different lookup tables for the matching network on the day; last one was for first 2 base boards, and was based off of cap measurements from Shot 18. It was fairly successful out to 275 kHz. Tripped the amplifier a few times, but overall good performance, particularly after the last lookup table was loaded. Up to and a little over 60 A into the antenna, with maybe a factor of almost 2 to spare on the source power. Managed an rgap scan on Shot 22, B_T scan on Shot 23, and B_T target of 3 T on Shots 24 and 26, during which the antenna was running pretty strongly and sweeping in the QCM band. Saw a few switching glitches on a few shots (i.e. some switches didn't seem engaged for during a sweep) - these didn't seem to cause trips but dropped throughput throughout that switch state. Outstanding issue: we are getting direct pickup of high harmonics (2nd to 6th and beyond), especially at high frequencies, on magnetics (e.g. KA_BOT and TOP, EF_BOT and TOP) and PCI fluctuation (e.g. Channels 29, 31, 32) signals. The pickup is there even in the no-plasma shots. This makes it difficult to determine what the antenna was doing to the plasma. Perhaps an AC ground-loop problem. Note that on 1120105020, when the amplifier was sitting on top of the half-rack, we didn't see this pickup. We will be trying to find this problem later on. Thanks are due to Physics Operator, Bob Granetz, and the whole crew for being awesome, as usual. Thanks, also, to Naoto and Cornwall and Seung Gyou and others for looking out on their diagnostics for Shoelace effects. SHOT: | f_low [kHz] | f_high [kHz] | amp_wave_w | Comment (changes made before shot) ------------------------------------------------------------------------------------------------ 1 | 40 | 300 | 160 | Lookup table with caps from 1120426929, 5 base boards 2 | 40 | 300 | 160 | Changed sweep to end at 1.3 s; RGAP=8 mm 3 | 40 | 300 | 160 | New lookup table, caps from 1120501901, src_v correct for this shot 4 | 40 | 250 | 240 | 5 | 40 | 300 | 240 | Amplifier tripped @~1.1 s 6 | 40 | 300 | 160 | New lookup table with caps from 1120426920, pulled out Base Boards 3, 4, and 5 7 | 40 | 300 | 240 | 8 | 40 | 300 | 240 | Swapped positions of I/V boxes #3 and #1 9 | 40 | 300 | 240 | Locked mode for Jon Rice, swapped signal lines for spare and src boxes, amplifier tripped around 1 s 10 | 40 | 300 | 240 | 11 | 40 | 300 | 240 | Changed to original 6:1 transformer; amplifier tripped; voltage error on src_v box went away 12 | 40 | 300 | 240 | Amplifier tripped 13 | 40 | 300 | 160 | 14 | 40 | 300 | 160 | Dud; tripped amplifier; 15 | 40 | 250 | 240 | New lookup table based 1120502012 - decent match 16 | 40 | 300 | 240 | 17 | 40 | 300 | 240 | 18 | 40 | 300 | 240 | RGAP~=5 mm 19 | 40 | 300 | 240 | runaway shot, ends around 676 ms 20 | 40 | 300 | 240 | New lookup table with caps from 1120502018; SOURCE NOT CONNECTED 21 | 40 | 300 | 240 | Nice match out to around 275 kHz, I_ant=60 A @lf, 35A@300 kHz 22 | 40 | 100 | 240 | RGAP scan from 4 mm to 15 mm, 0.9-1.3 s; f scans from 40-100 kHz from 0.5-0.9 s, stays at 100 kHz to 1.3 s 23 | 100 | 100 | 240 | B_T scan from 5.4 to 4 T, f=100 kHz const., current flat at 60 A 24 | 40 | 90 | 240 | target B_T at 3 T, dither f on 40-90-40 kHz with 0.2 s period 25 | 40 | 90 | 240 | fizzle 26 | 40 | 90 | 240 | target B_T at 3 T, f 40-90-40 kHz sweep 0.2 s period; on from 0.5 s-1.5 s; hit 3 T from 1.3-1.5 s |
| Physics Operator Summaries |
| Entered: May 2 2012 11:50:22:757PM |
| Author: Robert Granetz |
Run summary for Wednesday 2012/05/02
MP? - Commissioning of new QCM antenna
Session leaders: T. Golfinopoulos
Physics operator: R. Granetz
Excellent progress was made on shaking down the new QCM antenna drive
system. For today's purposes, we ran mostly vanilla discharges (0.8 MA,
5.4 T, 0.8e20 m-2, LSN) discharges, although towards the end of the day we
also did a ramp of the outer gap, and a couple of BTOR ramps. The ICRF was
able to start conditioning the J-port antenna late in the shot (t > 1.3 s).
We also had one locked-mode shot for HIREX calibration.
The machine ran very well today, with most shots being good full-length
plasmas. There was only one fizzle, one slideaway shot, and one dud (gas
valve signals failed).
Scorecard: 24 plasmas
1 dud
1 fizzle
0 power supply tests
0 no-power MDSplus cycle tests
0 no-power gas test
--------------
Total: 26 shot cycles
|
| Session Leader Comments | |||
| May 2 2012 11:31:20:007AM | 1120502001 | Theodore Golfinopoulos | To start:
40-300 kHz sweep (FREQ_PROGRAM.FREQ_WAVE_HZ = Build_Signal([40.,40.,300.,40.,40.] * 1000., *, [-.1,.5,1.,1.5,4.])) amplitude program step height=160 (amp_program.amp_wave_w: Build_Signal([0.,0.,160.,160.,0.,0.], *, [[-.1,.4999,.5,1.5,1.5001,4.]])) All 5 cap base boards installed matching network generated from: Load: R: f<150 kHz: data from 1120419902; f>150 kHz, earlier scope measurements. L: take mean value for whole frequency range from 1120419902. capacitances taken from 1120426929 (shot with 160 amp prog height) Result: Antenna ran Only matching up to around 200 kHz (where highest corner frequency for series caps hits) Match claims to be horrible - note that I'm using a scope probe for the src_v signal, though the repaired BOX I/V #1 was taking data, as usual (repaired in that 3/5 surface mount caps were replaced) got about 50 A into antenna below 200 kilohertz, pretty steady. |
| May 2 2012 11:31:01:820AM | 1120502002 | Theodore Golfinopoulos | Changed sweep to end at 1.3 s so that we don't overlap with ICRF tests:
freq_program.freq_wave_hz = Build_Signal([40.,40.,300.,40.,40.] * 1000., *, [-.1,.5,.9,1.3,4.]) amp_program.amp_wave_w = Build_Signal([0.,0.,160.,160.,0.,0.], *, [[-.1,.4999,.5,1.3,1.5001,4.]]) Otherwise, same as last shot. Had 8 mm rgap on this shot. You can see shoelace signal clearly on, e.g. BP_EF_BOT,TOP. Next: going to go in and changing lookup table, base caps off recent test shot, 1120501901, same load. |
| May 2 2012 11:30:46:283AM | 1120502003 | Theodore Golfinopoulos | Same sweep parameters
freq_program.freq_wave_hz = Build_Signal([40.,40.,300.,40.,40.] * 1000., *, [-.1,.5,.9,1.3,4.]) amp_program.amp_wave_w = Build_Signal([0.,0.,160.,160.,0.,0.], *, [[-.1,.4999,.5,1.3,1.5001,4.]]) Put in new lookup table, base caps off of 1120501901 (shot with 160 prog height), load as before Now, highest series cap level is 212 kHz. But this seems too low. In fact, series and parallel corner freqs seem backwards, though they were not generated as such. Anyway, it ran. Note: I/V Box #1 is still putting out too-large voltage up to 0.77 s or so - then, it recovers somewhat, though still a little highand puts out from Next: increase power a little bit, and back off frequency sweep to avoid trip. |
| May 2 2012 11:30:32:303AM | 1120502004 | Theodore Golfinopoulos | Increased power waveform height to 240, decreased frequency sweep to max of 250 kHz to avoid trip
amp_wave_w = Build_Signal([0.,0.,240.,240.,0.,0.], *, [[-.1,.4999,.5,1.3,1.3001,4.]]) freq_wave_hz = Build_Signal([40.,40.,250.,250.,40.] * 1000., *, [-.1,.5,.9,1.3,4.]) result: did not trip. match still claims to be horrible, but I don't think we're getting a good look-in voltage measurement Antenna current went up from Shot 3, though only matching earlier lookup table's performance of around 50 A. Still lose match where series caps stop switching. Next: frequency sweep now from 40-300 kHz - we will have a cell access afterward to update lookup table, and can check if trips then. |
| May 2 2012 06:17:56:177PM | 1120502005 | Theodore Golfinopoulos | Tripped amplifier.
Also, mis-programmed amp waveform After this shot: Went in cell and put in new lookup table, effective caps from 1120426920, load as before (R: mix of 1120419902 for f<150 kHz, scope measurements, otherwise; L: take mean value from data, 1120419902) This is appropriate for two base boards. Removed Base Boards 3, 4, and 5. Reset RF amplifier, since it tripped on Shot 5. Backed off on power program to 160 again, extended sweep back out to 300 kHz. |
| May 2 2012 11:27:34:157AM | 1120502006 | Theodore Golfinopoulos | amp_wave_w=Build_Signal([0.,0.,160.,160.,0.,0.], *, [[-.1,.4999,.5,1.3,1.3001,4.]])
freq_wave_hz=Build_Signal([40.,40.,300.,300.,40.] * 1000., *, [-.1,.5,.9,1.3,4.]) Result: normal operation |
| May 2 2012 11:30:12:293AM | 1120502007 | Theodore Golfinopoulos | Increased power program to 240
Result: No trip. I/V Box #1 at src_v position is still flaky After this shot - went in and swapped spare I/V box, #3, with src_v box, #1, to see if we can't reproduce the flaky voltage jump with a different box. |
| May 2 2012 11:47:49:887AM | 1120502008 | Theodore Golfinopoulos | Same parameters as last shot - now, I/V Box #1 is on load-side of transformer, I/V Box #3 is on source side in src_v position. The same BNC cabling still runs to each position - only the boxes have been swapped. Try to see whether we see flakiness on a different box in the same position. If don't see it on the first time, try again, since the problem is intermittent.
Result: Do seem to see flakiness on output from Box #3 in src_v position, while don't see any jumps in voltage amplitude from Box #1 in spare_v position (load-side of transformer). Going to try again and then go in and swap cables. |
| May 2 2012 12:06:23:217PM | 1120502009 | Theodore Golfinopoulos | This was a locked-mode shot for Jon Rice's calibration.
Meanwhile, Box #3 in the SRC_V position still showed a voltage too high from what it should be, while Box #1 did not. Also, the amplifier tripped. After the shot, I went in and swapped the signal lines from the spare and src_v positions. Now, SRC_V.RAW = INPUT_07 SRC_I.RAW = INPUT_08 SPARE_V.RAW = INPUT_06 SPARE_I.RAW = INPUT_05 (ACQ_216_3) Otherwise, same parameters, even the 240 amp program - we hadn't tripped the amplifier before.... |
| May 2 2012 12:27:07:547PM | 1120502010 | Theodore Golfinopoulos | Result:
Despite the swap of cables, the odd behavior in output voltage for the first part of the frequency upsweep persists. I don't understand it. (Amplifier didn' trip.) Going back in. -Swapped transformer - now, back to original 6:1 transformer. Left everything else the same. |
| May 2 2012 12:41:36:353PM | 1120502011 | Theodore Golfinopoulos | The voltage on the src_v I/V box (now #3) did not climb to high or saturate.
The amplifier tripped around 1 s - went in and reset it after shot. Next: try again and see if voltage signal behaves still. |
| May 2 2012 01:02:29:647PM | 1120502012 | Theodore Golfinopoulos | Once again, did not see too-high-voltage coming out of src_v i/v box.
Tripped amplifier again around 1 s. Went in after shot and reset it Next: Lowered amp_wave_w to 160 height - leaving frequency program same. |
| May 2 2012 01:22:34:793PM | 1120502013 | Theodore Golfinopoulos | Still no jump in voltage on src_v box.
Did not trip amplifier this time - lower amp_wave_w program (160 instead of 240). Realized forgot to re-point references in tree after swapped src_v, src_i and spare_v, spare_i signal lines back to where they're suppose to be. Will fix later. Correct references for this shot are SRC_V.RAW = INPUT_06 SRC_I.RAW = INPUT_05 SPARE_V.RAW = INPUT_07 SPARE_I.RAW = INPUT_08 This is already in place for Shot 14. Next: same, and then will change lookup table based on capacitances from Shot 12. Note that that shot had amp_program_w of 240 - may make difference for nonlinear leakage capacitance. |
| May 2 2012 02:18:51:630PM | 1120502014 | Theodore Golfinopoulos | This was a dud - didn't get puff of gas. None of the valves went, according to PO Bob Granetz.
On Shoelace, now using output from I/V Box (#3) for SRC_V. Calibrating it with Python script. Overloaded amplifier. Before that, using output from I/V Box #3 for source voltage, and calculating fractional power throughput to matching network with this, see that match is pretty good up to 200 kHz. After this shot, went into cell, reset amplifier, and installed new lookup table with capacitances based on 1120502012. Load model as before. Next: increase amp_wave_w to 240, but run frequency sweep from 40-250 kHz to avoid tripping amplifier. The higher amp_wave_w pulse height matches the settings used in the shot from which the lookup table effective capacitances were extracted. (Note: still have only first two base-boards in.) Analysis: On this no-plasma shot, still see high harmonics on coils on extensions - looks like we are getting direct pick-up somewhere. |
| May 2 2012 01:44:20:980PM | 1120502015 | Theodore Golfinopoulos | This shot had a new lookup table based on effective capacitances from 1120502012, same load model.
amp_wave_w at 240, frequency sweep only 40-250 kHz to avoid trip. Result: did not trip the amplifier. Match is not terrific but is around or above 80 % into matching network up to 250 kHz. Note that don't have correct calibration for I/V box on load-side of transformer - it is from previous capacitor set, and not the new caps in the divider. Next: increase frequency sweep to 300 kHz. |
| May 2 2012 07:04:19:393PM | 1120502016 | Theodore Golfinopoulos | Increased sweep to 300 kHz; no trip; match is not great but getting more than 60 % power into matching network up to about 300 kHz, except when there is a switching error on up-sweep of frequency (I think) at 245 kHz.
54 A into antenna at low frequencies (<~=100 kHz), 32 A at high frequencies (300 kHz). |
| May 2 2012 02:17:46:750PM | 1120502017 | Theodore Golfinopoulos | Match is okay out to 300 kHz, no trip.
At low frequencies, get around 55 A into antenna. This drops to around 40 A at 200 kHz, and 32.5 A at around 300 kHz. Next: decrease RGAP to around 5 mm. |
| May 2 2012 02:52:19:870PM | 1120502018 | Theodore Golfinopoulos | Once more - decent match out to 300 kHz - not great.
Current falls off from 55 to 30-ish over sweep. There's a break which happens around 100 kHz (maybe 106) where the match gets worse. The antenna resistance measurement looks good for some reason on this one. RGAP=5mm (target, at least) Looking on PCI - channels 29, 31, 32 see something, especially at second and higher harmonics - is it noise/pickup (direct)? Other channels? Probably direct pickup, since PCI also sees harmonics on Shot 14, which was had no plasma (dud). Put in new calibration for Box #1 since swapped out 3/5 capacitors (all but the trim) in the capacitive voltage divider. Re-ran process with new calibration. |
| May 2 2012 03:03:47:120PM | 1120502019 | Theodore Golfinopoulos | Shot ran away and ended at around 676 ms
Couple of trips in matching network switches around 245 and 265 kHz. Otherwise - similar - even a little better. Antenna resistance goes down again. After this shot, went in cell and 1. Loaded in new lookup table generated from effective caps based on 1120502018 (with correct calibration for I/V Box #1, now in SPARE_V/I position to give us effective capacitances with Box #2 in ANT pos) 2. disconnected scope probe box. Don't think that will cut down on pickup on diagnostics, as have seen this on coils on other shots, but we're not using the scope probe now, in any case. |
| May 2 2012 03:39:05:433PM | 1120502020 | Theodore Golfinopoulos | src input was actually not connected to matching network in! Mistakenly connected to (floating) receiver box. This is why amplifier tripped and no current got into network or antenna.
After shot, went in cell: 1. took out spare I/V box, Box #1 2. moved Box #1 back to src_v spot (i.e. source-side of transformer), replacing Box #3 3. disconnected signal outputs from box with scope probe (the ones going to Patch Channels 12 and 2) 4. fixed source input line so that it goes to I/V Box #1 now 5. Checked isolation between machine and matching network - shield of cable to antenna and shield of Type N connector coming out of last I/V box (#2) of matching network. Showed something like (-) 500 kohm. From antenna cable shield to transformer primary, 0.2 ohms, as expected. (Antenna was 0.3-0.4 ohms at dc - expected.) Changed BOX_NUM node in shoelace:src_v.raw so that it contains 1 now, per change above. Next: same sweep, plasma parameters. |
| May 2 2012 05:32:33:090PM | 1120502021 | Theodore Golfinopoulos | The new lookup table gets pretty good match (at or above 90 % into matching network) up to around 250 kHz. Then, a switch trips (on both the upward and downward frequency sweeps - not sure this is a trip but maybe just a bug in the lookup), then recovers, and the match twes a little worse (down to 85 % throughput out to 275 kHz, and drops more after that).
Still see harmonics stronger than fundamental on, e.g. BP_EF_TOP. Didn't see signal on PCI, however. Next: Rgap scan from 4 mm to 15 mm from 0.9 s to 1.3 s. Sweep frequency from 40 to 100 kHz from 0.5 to 0.9 s, and hold at 100 kHz from 0.9 to 1.3 s during rgap scan. |
| May 2 2012 05:32:50:997PM | 1120502022 | Theodore Golfinopoulos | RGAP scan from 4 mm to 15 mm from 0.9 to
Result: Match clean frmo 40-100 kHz, at constant frequency, hit 59-60 A current in the antenna and stay there. Noise in harmonics stays despite changing RGAP - more evidence that this is direct coupling outside the plasma, i.e. driving ground currents, AC ground loop. |
| May 2 2012 05:36:09:150PM | 1120502023 | Theodore Golfinopoulos | B_T scan from 5.4 to 4.0 T, fixed Shoelace frequency at 100 kHz.
Current stays around 58-60 A for whole shot - droops slightly over the course of the shot, and antenna resistance rises from 0.42-0.47 ohms, presumably because the antenna is getting hot. Next: try targetting 3 T - let the field come down as fast as it's able. Dither frequency from 40-90 kHz in triangle wave to sweep across range of QCM. Keep lookup table, amp program as-is. |
| May 2 2012 05:36:33:853PM | 1120502024 | Theodore Golfinopoulos | Target B_T around 3 T, dither frequency from 40-90 kHz triangle wave with 0.2-s period.
freq_program.freq_wave_hz = Build_Signal([40.,40.,90.,40.,90.,40.,90.,40.,90.,40.,40.] * 1000., *, [-.1,.5,.6,.7,.8,.9,1.,1.1,1.2,1.3,4.]) Next: try to run to 1.5 s, when B_T actually gets to around 3 T. Add another frequency cycle. |
| May 2 2012 05:36:45:190PM | 1120502025 | Theodore Golfinopoulos | Fizzle. Try again. |
| May 2 2012 05:38:16:933PM | 1120502026 | Theodore Golfinopoulos | Low field target (3 T), run Shoelace from 0.5-1.5 s, 5 cycles of frequency sweep from 40-90 kHz, amp_wave_w at 240.
Result: Got 60 A into the antenna, fairly flat over the 50 kHz band. B_T hits 3 T around 1.3 s We get a full frequency cycle from 40 to 90 to 40 kHz from 1.3 s to 1.5 s, while field trace is flat. Still seeing harmonic noise on, e.g. some of the coils on extensions - do not really see noise on PCI (probably thanks to staying at lower frqeuencies). Last shot of the day - thanks, all ;) |
| Physics Operator Comments | |||
| May 2 2012 08:54:30:970AM | Robert Granetz | I loaded shot 1120501032 from yesterday (all segments), and tweaked BTOR back to 5.4 T (150 kA) in segment 2. | |
| May 2 2012 09:10:09:010AM | 1120502001 | Robert Granetz |
Shot 01 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN. We want ohmic plasmas for
the QCM checkout, but the ICRF can go after t=1.3 s. Prf=1-2 MW from J-port on
this shot. Outer gap = 13-14 mm.
Next shot: reduce outer gap to about 8 mm (increase RCUR by 3 mm)
|
| May 2 2012 09:40:17:387AM | 1120502002 | Robert Granetz |
Shot 02 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 8 mm.
Prf=2 MW (J-port) after t=1.3 s.
Next shot: repeat, no changes except turn on argon valve (75 ms puff starting at t=0.3 s)
|
| May 2 2012 09:54:02:257AM | 1120502003 | Robert Granetz |
Shot 03 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 8 mm.
Prf=2 MW (J-port) after t=1.3 s.
Next shot: repeat, no DPCS changes; Have EO move fizzle off time to 1.8 s (from 2.1 s) so
that TF gets to zero by 4 s (since OH coaxes are doing fine)
|
| May 2 2012 10:14:13:170AM | 1120502004 | Robert Granetz |
Shot 04 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 8 mm.
Prf=1.7 MW (J-port) after t=1.3 s.
We are having 10-12 minutes of extra delay between shots because of slow cooling
of the A-right vertical TF leg.
Next shot: repeat, no DPCS changes
|
| May 2 2012 10:52:37:103AM | 1120502005 | Robert Granetz |
Shot 05 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 8 mm.
Prf=1.8 MW (J-port) after t=1.3 s.
We are having 10-12 minutes of extra delay between shots because of slow cooling
of the A-right vertical TF leg.
Next shot: repeat, no DPCS changes
|
| May 2 2012 10:55:12:863AM | 1120502006 | Robert Granetz |
Shot 06 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.8 MW (J-port) after t=1.3 s.
Next shot: repeat, no DPCS changes
|
| May 2 2012 11:40:00:970AM | 1120502007 | Robert Granetz |
Shot 07 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Lots of faulting on RF.
Next shot: repeat, no DPCS changes
|
| May 2 2012 11:41:28:853AM | 1120502008 | Robert Granetz |
Shot 08 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.8-2 MW (J-port) after t=1.3 s.
Next shot: run a locked-mode shot to calibrate HIREX at the request of John Rice. John
suggests 1120224017. The active segment is #4, so I loaded that into seg 4 of
the current DPCS, and activated it.
|
| May 2 2012 11:56:01:993AM | 1120502009 | Robert Granetz |
Shot 09 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN. This was a locked mode shot to
calibrate HIREX. The rotation locked around t=0.63 s.
Next shot: back to the standard shot (i.e. shot 8) by turning on seg 2 and turning off seg 4.
|
| May 2 2012 12:16:03:070PM | 1120502010 | Robert Granetz |
Shot 10 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.1 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 12:43:23:673PM | 1120502011 | Robert Granetz |
Shot 11 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.5 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 01:14:31:887PM | 1120502012 | Robert Granetz |
Shot 12 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.6 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 01:14:52:040PM | 1120502013 | Robert Granetz |
Shot 13 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.7 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 01:27:10:210PM | 1120502014 | Robert Granetz | Shot 14 -- Dud. DPCS gas valve signals didn't make it down to the valves. Next shot: try again |
| May 2 2012 02:05:02:297PM | 1120502015 | Robert Granetz |
Shot 15 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.7 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 02:05:08:297PM | 1120502016 | Robert Granetz |
Shot 16 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.7 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 02:16:07:877PM | 1120502017 | Robert Granetz |
Shot 17 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 9 mm.
Prf=1.7 MW (J-port)
Next shot: repeat, with outer gap reduced to 5 mm
|
| May 2 2012 02:36:56:500PM | 1120502018 | Robert Granetz |
Shot 18 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 5 mm.
Prf=2 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 03:07:04:157PM | 1120502019 | Robert Granetz |
Shot 19 -- Plasma, but this was a bad slideaway startup, and the DPCS went into its xjump procedure.
There was synchrotron emission briefly on the WIDE2 view. Startup conditions were unchanged
from preceding shots, so I don't have any changes to make to the startup.
Next shot: try again, no startup changes
|
| May 2 2012 03:12:45:420PM | 1120502020 | Robert Granetz |
Shot 20 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 5 mm.
Prf=2 MW (J-port)
Next shot: repeat, no DPCS changes
|
| May 2 2012 03:56:29:347PM | 1120502021 | Robert Granetz |
Shot 21 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap = 4 mm.
Prf=2.1 MW (J-port)
Next shot: ramp outer gap during shot from 4 mm at t=0.9 s to 15 mm at t=1.3 s
|
| May 2 2012 04:08:42:270PM | 1120502022 | Robert Granetz |
Shot 22 -- Plasma, good shot. 0.8 MA, 5.4 T, 0.8e20 m-2, LSN, outer gap scanned from 4 to 15 mm.
Lots of faulting on the RF.
Next shot: fix outer gap at 4 mm, ramp Bt from 5.4 T at t=0.5 s to 4.0 T at t=1.3 s.
|
| May 2 2012 04:20:27:190PM | 1120502023 | Robert Granetz |
Shot 23 -- Plasma, good shot. 0.8 MA, 5.4 T --> 4.0 T, 0.8e20 m-2, LSN, outer gap = 4 mm.
Lots of faulting on the RF.
Next shot: ramp BTOR down faster, to 3.0 T at t=1.1 s.
|
| May 2 2012 04:32:49:467PM | 1120502024 | Robert Granetz |
Shot 24 -- Plasma, good shot. 0.8 MA, 5.4 T --> 3.0 T, 0.8e20 m-2, LSN, outer gap = 4 mm.
No RF, since the field is not 5.4 T.
Next shot: repeat, no DPCS changes
|
| May 2 2012 04:46:46:103PM | 1120502025 | Robert Granetz | Shot 25 -- Fizzle. Pre-fill pressure is low. Next shot: add +2 ms to pre-fill puff |
| May 2 2012 05:06:19:713PM | 1120502026 | Robert Granetz | Shot 26 -- Plasma, good shot. 0.8 MA, 5.4 T --> 3.0 T, 0.8e20 m-2, LSN, outer gap = 4 mm, ohmic only. End of run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:59:11:023AM | Plasma | Ok | |
| 2 | 09:19:55:350AM | Plasma | Ok | |
| 3 | 09:44:04:873AM | Plasma | Ok | |
| 4 | 10:09:06:223AM | Plasma | Ok | |
| 5 | 10:28:31:640AM | Plasma | Ok | |
| 6 | 10:49:44:773AM | Plasma | Ok | |
| 7 | 11:07:55:747AM | Plasma | Ok | |
| 8 | 11:32:34:890AM | Plasma | Ok | |
| 9 | 11:49:53:107AM | Plasma | Ok | |
| 10 | 12:10:42:187PM | Plasma | Ok | |
| 11 | 12:29:14:610PM | Plasma | Ok | |
| 12 | 12:51:39:297PM | Plasma | Ok | |
| 13 | 01:07:54:563PM | Plasma | Ok | |
| 14 | 01:21:13:843PM | Plasma | Ok | |
| 15 | 01:35:08:267PM | Plasma | Ok | |
| 16 | 01:49:01:447PM | Plasma | Ok | |
| 17 | 02:05:39:313PM | Plasma | Ok | |
| 18 | 02:25:00:020PM | Plasma | Ok | |
| 19 | 02:48:26:567PM | Plasma | Ok | |
| 20 | 03:08:48:470PM | Plasma | Ok | |
| 21 | 03:48:09:490PM | Plasma | Ok | |
| 22 | 04:01:14:987PM | Plasma | Ok | |
| 23 | 04:14:14:020PM | Plasma | Ok | |
| 24 | 04:28:05:083PM | Plasma | Ok | |
| 25 | 04:41:16:480PM | Plasma | Ok | |
| 26 | 04:54:25:933PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| May 2 2012 08:58:47:123AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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