| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Matt Reinke,Theodore Golfinopoulos |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Andy Pfeiffer,Bill Parkin,Andy Pfeiffer,Bill Byford |
| Engineering Operator Run Comment |
| MP 502, HIREX-SR Calibration Plasmas MP MP590a- TAEs and RF tail losses |
| Session Leader Plans |
| Entered: Feb 25 2010 01:22:29:570PM |
| Author: Matt Reinke |
| Run Plan for AM 1/2-day of 1100226
MP502 - HIREXSR Calibration Plasmas This run day will consist of a series of repeated Ar seeded plasmas where we will change HIREXSR crystal size shot-to-shot in order to understand and avoid vignetting. After about ~003 we will require a cell access after every shot. Load 1090915020 (USN, 1 MA) turn off ICRF, set nl04 target to 0.8. Enable cyropump for shot 001 Fill B-SIDE-LOWER with 0.5 psi Ar but leave off for shot 001 1) demonstrate target w/o Ar seeding (1 shot) 2) add steady Ar pulse from 0.4-1.4 at p=0.5 psi and demonstrate reproducibility (2+shots) 3) put on 50% He-crystal mask and check vignetting. If present move crystal and/or HIREXSR housing and repeat 4) put on 50% H-like crystal mask and check vignetting. If present move crystal and repeat (DO NOT MOVE HOUSING) 5) if have extra shots use left/right masks, 25% masks and 0% masks to extend dataset |
| Entered: Feb 26 2010 01:03:29:060PM |
| Author: Theodore Golfinopoulos |
| Continue pacing ICRF modulation technique for driving Alfven eigenmodes.
Comparison to Active MHD antenna was a component for this run, but as of this writing, Active MHD drive is offline. If this remains the case during the run, we will replace those shots that were to employ Active MHD drives with further scans of B_T and density. Key Diagnostics: magnetics fluctuations, PCI, HIREX Sr, CNPA Shot 1 Ref. Shot: 1091208026 (CORRECTION) HIREX Sr Calibration shot Shots 2-5 Ref. Shot: 1100122030 B_T = 6.0 T, nl04 = 1E20 [m^-2], I_p = 0.8 MA Description: Switching between ICRF Modulation and Active MHD. Note on Shot 2: we will disengage phase plate on PCI to determine whether pickup in Channels 9 and 10 during Run 1100122 was spurious. Shot 6 Ref. Shot: 1100122030 B_T = 5.7 T, nl04 = 1E20 [m^-2], I_p = 0.8 MA Description: ICRF modulation, scan B-field to check scaling with Alfven velocity. Shot 7 Ref. Shot: 1100122030 B_T = 5.4 T, nl04 = 1E20 [m^-2], I_p = 0.8 MA Description: ICRF modulation, scan B-field to check scaling with Alfven velocity. Shots 8-10 Ref. Shot: 1080403010 B_T = 5.9 T, nl04 = 0.65E20 [m^-2], I_p = 0.6 MA Description: Test ICRF modulation with diverted plasma, upper null; use both ICRF modulation and Active MHD drive; note Jason Sears observed resonances in the reference shot around 850 kHz. Shots 11-12 Ref. Shot: 1100224006 B_T = 5.4 T, nl04 = 0.65E20 [m^-2], I_p = 0.8 MA (note difference in I_p from reference shot) Description: Test ICRF modulation with diverted plasma, lower null in H-mode; use both ICRF modulation and Active MHD drive. Shots 13 Ref. Shot: 1100224006 B_T = 5.7 T, nl04 = 0.65E20 [m^-2], I_p = 0.8 MA (note difference in I_p from reference shot) Description: Continue with diverted plasma in H-mode; change B-field to examine f_res scaling with V_alfven. |
| Physics Operators Plans |
| Entered: Feb 26 2010 07:23:50:913AM |
| Author: Bill Rowan |
| Run plan for Friday, February 26, 2010, Run 1100226
Purpose: MP 502, HIREX-SR Calibration Plasmas MP MP590a- TAEs and RF tail losses Session Leader: Reinke (MP502), Golfinopoulos (MP590a) Physics Operator: Rowan Run Plan Start with MP 502. The starting shot will be 1090915020 with nl_04 adjusted up to 0.8e+20. Cryo will be on from the first shot. Argon will be disabled for the first shot. Run similar shots with argon for the remainder of the morning. PM: MP 590a. Repeat shots from 1100122. Then diverted shots based on 1080403010 and 1100224006. Diagnostics: Active MHD, PCI, HIREX-SR ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1090915020 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 0.5 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi D2 DISABLED Enable gatevalves and shutters: ECE, VUV, HiREX Sr, Z-bolo, B-Spectr Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): YES ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): YES Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s |
| Session Leader Summaries |
| Entered: Feb 26 2010 02:16:46:177PM |
| Author: Matt Reinke |
| Summary for MP502 1/2 Run
-------------------------- The tokamak ran very well and we were able to produce very repeatable Ohmic Ar seeded plasmas with plenty of signal in both H-like and He-like Ar. We were able to get a lot of data showing problems with HIREXSR vignetting on both the H-like and He-like system, but weren't able to leave the He-like system aligned and un-vignetted about the z-line which was the primary goal. The H-like vignetting needs to be compared to ray tracing to see if the brightness profile can be corrected. This impacts next Thurs/Fri runs using the system to view He-like Ca. Obtained fully covered crystal data for both arrays and first analysis shows that almost all the background is incoherent scattering not continuum coming directly through the crystal. This will help inform whether or not background can be used to correct for vignetting in past data. |
| Entered: Mar 1 2010 03:20:35:887PM |
| Author: Theodore Golfinopoulos |
| Prior to this Run:
****************** 1. Tried to improve scheme for modulating ICRF, but returned to original mixers. 2. Swapped function generator to Agilent model, controllable on the local network - this saved us a bunch of power room accesses. 3. Combined sweeping frequency in modulation envelope with a reference signal at 300 kHz for calibration purposes. 4. Lost Active MHD antenna drive for the day in the process of modifying control unit to be able to drive on amplifier at a fixed 300 kHz, but the other at a sweeping frequency. Goals for the Day: ****************** 1. Establish whether or not PCI signal in Channels 9 and 10 during 1100122 run was direct pickup from the antenna. 2. Try to reproduce resonances from 1100122030 3. Explore diverted plasmas - try to produce resonances with upper and lower single null plasmas. 4. Check scaling of resonant frequencies with Alfven speed. 5. Compare ICRF modulation drive to active MHD drive. Results: ******** Thanks to the crew, particularly for staying for the last, late shot. We took 14 shots. There were two fizzles, one no-power shot, and two HIREX Sr calibration shots; the remaining 9 shots were given to ICRF modulation studies. Of these, 3.5 had successful ICRF modulation; the remaining shots encountered problems with impedance matching for D antenna, as well as potentially overmodulating the carrier signal. 1. It is fairly clear at this point that the PCI has direct pickup of the ICRF modulation. 2. Reproducing resonances from 1100122030 - we managed to reproduce this shot, 3. Diverted plasmas: We attempted three shots with a lower-null plasma. We obtained full length plasmas, but were unable to achieve a sufficient match for D antenna, and so there was no ICRF modulation present in these shots. 4. Shots 26 and 27 explore two field levels - not a wide scan in parameter space. 5. Active MHD drive offline for the day, so we could not compare with ICRF modulation. Shot 17: No-power shot. Shots 18-20: Locked mode shots for HIREX Sr calibration, repeating 1091208026. Shot 18 was a successful locked mode, but settings on HIREX Sr were off, and so we had to do a repeat. 19 was a fizzle. 20 was the successful repeat. Shots 21-23: 2 full-length plasmas and one fizzle. D antenna faulted - no ICRF modulation. Shot 24: D antenna on for two short bursts, and 1 Vpp modulation - not a very successful shot, but worth revisiting. Shots 25-27: Best shots of the day. Revisiting 1100122030. D antenna is on for 0.6-1 s. PCI is off on Shot 25, but we still see sweeping signal, particularly on Channel 9 (note that modulation amplitude is low on this shot, so a smaller signal amplitude relative to Shot 26 would still be consistent with the hypothesis that the signal seen on PCI is merely pickup). Shot 26 had a lower slew rate for more loiter time around resonances (sweep range was 420-670 kHz). Shot 27 lowered B-field to check scaling of resonances with Alfven speed, TAE gap center frequency. Dropped lower bound of sweep range, so that range was 350-850 kHz. Shots 28-30: Attempt to achieve H-mode from 1100224006. Never achieved match in D antenna, and so no ICRF modulation. Short H-modes in shots 28 and 29. No J antenna in Shot 30. Before next run: **************** 1. There are several questions surrounding the ICRF modulation setup which must be addressed - among them, (a) how does the voltage amplitude of the modulation signal map to the level of modulation in the plasma (and in the dummy load)? (b) are the notch filters responsible for the non-flat response of the D antenna power output as the modulation frequency is swept? Is it the narrow band of the transmitter, itself, on resonance? Some combination of these things, or something else? 2. Modulating the ICRF tends to make matching more difficult. A judicious choice of reference shots for which the matching is well characterized will help in this regard. Also, analyzing the matching from today's shots may provide useful information. 3. Active MHD drive needs to be repaired. |
| Physics Operator Summaries |
| Entered: Feb 28 2010 03:41:25:603PM |
| Author: Bill Rowan |
| Physop Summary February 26, 2010, Run 1100226
The purpose of the morning run is development of x-ray spectrometer instrumentation (MP 502, HIREX-SR Calibration Plasmas). This run consisted of shots 001 - 016. The SL selected a standard discharge with argon puffing and with the cryopump on to obtain a steady state level of argon. The reference shot was 1090915020 (1 MA, USN) with a more recent segment 1 from shot 1100225032. BT was adjusted down to 5.4 T so that the GPC would not need adjustment. The impurity injector was used for aluminum injection. Natural moly injections were frequent and resulted in a few early disruptions. The afternoon run was for MP590a- TAEs and RF tail losses and consisted of shot 017-030. A locked mode shot (1091208026) was used for rotation calibration of the HIREX-SR. Most of the run was based on reference shot 1100122030 which is not diverted. The last three shots were intended to produce H-mode using a diverted shot based on 1100224006. Aluminum injection was off for the entire pm part of the run. There were two cryo problems. Shot 016 was delayed due to failure in the helium flow. Assume that this was due to a valve problem. Direct inspection by the engineers did not reveal a problem. The problem cured itself and only resulted in the delay of one shot. The second problem was a fizzle on shot 023. For this shot, the pressure was twice as high as expected based on previous shots. The cryo was likely responsible for this as well. There was a gas puff problem on shot 014: there was no gas puff. No apparent reason for this. Shots 013 and 015 were okay with regard to gas puffing. The PF breaker pulled after shot 012. score card 26 plasma 001,002,003,004,005,006,007,008,009,010,011,012,013, 015,016,018,020,021,022, 024,025,026,027,028,029,030 02 engineering faults: 017(no power shot),014(no gas puff) 02 fizzles 019,023 ---------- 30 total |
| Session Leader Comments | |||
| Feb 26 2010 09:09:30:273AM | 1100226001 | Matt Reinke | Large early Mo flake kills the plasma in ramp-up
NEXT: Repeat w/o troublesome molybdenum |
| Feb 26 2010 09:33:59:473AM | 1100226002 | Matt Reinke | Full length shot. Steady density at nl04=0.72. Lower than demand but fine as long as it stays there. H-like HIREXSR
NEXT: enable 0.4-1.4 sec Ar pulse and repeat shot. IMPINJ is firing Al at 1.4 sec. |
| Feb 26 2010 09:45:17:330AM | 1100226003 | Matt Reinke | Good shot, good Ar level. It's rising during the shot which isn't expected compared to when we did using RF. That should be fine as long as it's repeatable. HIREXSR H-like still not seeing past core.
NEXT: Repeat to test repeatability of Ar seeded plasma. |
| Feb 26 2010 10:00:55:677AM | 1100226004 | Matt Reinke | Good shot. Ar reproducibility is good but not great. Still not seeing full H-like profile.
NEXT: Repeat shot, moving Al inj to 0.7 seconds and cover He-like crystal with large mask. |
| Feb 26 2010 10:24:06:860AM | 1100226005 | Matt Reinke | Nice repeated shot.
NEXT: Small HIREXSR mask installed. |
| Feb 26 2010 10:38:55:533AM | 1100226006 | Matt Reinke | z-line vignetting clearly visible. Need to move position on detector closer to center (x/y are ~OK)
NEXT: removed He-like cover. |
| Feb 26 2010 10:49:41:077AM | 1100226007 | Matt Reinke | Good shot, hards starting to come up early. Crystal moved too far.
NEXT: move crystal back to center, confirm alignment and then move enclosure. |
| Feb 26 2010 11:03:13:983AM | 1100226008 | Matt Reinke | Good shot, He-like back to nominal position
NEXT: Move HIREXSR enclosure to try to avoid vignetting and dropped viewing angle by 0.16 deg. |
| Feb 26 2010 11:14:26:933AM | 1100226009 | Matt Reinke | Much better alignment of HIREXSR. See the z-line much farther out.
NEXT: Install large He-like crystal cover. Remove the lower 1/2 H-like cover and repeat shot. |
| Feb 26 2010 11:42:13:980AM | 1100226010 | Matt Reinke | Good shot. Demonstrates the H-like system vignetting in the core. On the He-like xy and look great but a little vignetting on w and z.
NEXT: full cover on He-like, small cover on H-like. |
| Feb 26 2010 11:54:24:667AM | 1100226011 | Matt Reinke | He-like completely covered and test shows that HIREXSR background is NOT continuum through the crystal.
NEXT: Cover H-like, no mask on He-like. Move z-line a little towards the center and move the spectra down on the detector to get a good zero on the above midplane chords. |
| Feb 26 2010 12:04:14:147PM | 1100226012 | Matt Reinke | The angle movement of the enclosure went in the wrong direction.
NEXT: Put 1/2 cover (top) in the H-like crystal and adjust the vertical position in the other direction. |
| Feb 26 2010 12:27:33:970PM | 1100226013 | Matt Reinke | Vertical movement cutoff the z-line. RF trace shows power but it's into a dummy load.
NEXT: Uncover H-like, undo vertical adjustment. |
| Feb 26 2010 12:38:45:907PM | 1100226014 | Matt Reinke | fizzle |
| Feb 26 2010 01:03:25:980PM | 1100226015 | Matt Reinke | He-like z-line still cutoff relative to x+y.
NEXT: last shot, remove He-like crystal cover. |
| Feb 26 2010 01:25:02:710PM | 1100226016 | Matt Reinke | Long wait to fix cryopump. Pressure jumped up to ~mTorr range a while before the shot. Probably something that helped lead to the early disruption?
END OF 1/2 RUN |
| Feb 26 2010 01:43:04:590PM | 1100226017 | Theodore Golfinopoulos | Locked mode shot - 1091208026
Result: No-power shot. Next: Try again. |
| Feb 26 2010 02:06:38:397PM | 1100226018 | Theodore Golfinopoulos | Goal: Locked mode shot for HIREX Sr calibration.
Result: achieved locked mode shot, but we will need another for calibration. Next Shot: Repeat. |
| Feb 26 2010 02:13:44:750PM | 1100226019 | Theodore Golfinopoulos | Goal: Locked mode shot repeat.
Result: Fizzle. Next: Repeat. |
| Feb 26 2010 02:33:44:490PM | 1100226020 | Theodore Golfinopoulos | Goal: Locked mode shot for HIREX Sr calibration (3rd attempt)
Result: Plasma locks just before 0.65 s; disrupts at ~1.2 s. John Rice says it is adequate for calibration, so we will move on. Next Shot: Reference Shot 1100122030 - attempt to reproduce resonances seen in original shot. Also: disengage PCI phase plate to determine whether sweeping signal observed throughout the 1100122 run in Channels 9 and 10 was simply pickup in the instrumentation. |
| Feb 26 2010 02:59:14:177PM | 1100226021 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** Reproduce resonance from 1100122030 - drive through with ICRF modulation. Result: ******* Bt: 6 T Ip: 0.8 MA Nl04: 0.95E20 Picrf: 0.9 MW (2 MW target) Full-length plasma. Problem with D port => no ICRF modulation. Steve Wukitch thinks this is a match problem and is trying to recover the match from 1100122030. Next Shot: ********** Repeat. Turned off sweeping modulation signal (though 300 kHz reference is still on) - Steve will take advantage of this to improve the match with D antenna. |
| Feb 26 2010 03:15:42:413PM | 1100226022 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** Try to get D antenna matched, outputting power. Result: ******* Bt: 6 T Ip: 0.8 MA, stabilizing at 0.56 s Nl04: 1E20 Picrf: 2 MW + modulation Steve Wukitch's operation on D antenna matching was succesful - now achieved full power. Steve recommends that we try to stabilize I_p earlier, and also that we bring on the modulation later (on at 0.6 s) so as to wait for plasma to stabilize, and matching to settle. We will do this; I have also increased the modulation cycle frequency to 1.11 Hz (from 1 Hz) to ensure full coverage of the frequency range. Bill Rowan has adjusted control to have earlier stabilization. Also, Matt Reinke suggests lengthening the argon puff pulse length. Next Shot: ********** Try again with modulation - still trying to bring back 1100122030. |
| Feb 26 2010 03:22:07:203PM | 1100226023 | Theodore Golfinopoulos | Goal:
***** Try again with modulation - still trying to bring back 1100122030. Result: ******* Fizzle - pressure was anomalously from 1100226022 - looks like problem cryo pump. Next Shot: ********** Repeat. |
| Feb 26 2010 03:40:53:367PM | 1100226024 | Theodore Golfinopoulos | Shot Summary: 1100226024
Goal: ***** Trying to reproduce resonances in 1100122030, take #4 ...action! Result: ******* Bt: 6 T Ip: 0.8 MA, stabilizes a little earliier Nl04: wobbly around 1E20 Picrf: 2 MW with D, 0.75 without Full length plasma, but D antenna faults out, mismatch in J4 around 0.8, and also an injection, wobble in density. => no modulation. Next Shot: ********** Try again, but cut modulation amplitude from 1 Vpp to 0.25 Vpp. |
| Feb 26 2010 04:00:19:513PM | 1100226025 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** Trying to reproduce resonances in 1100122030 Result: ******* Bt: 6 T Ip: 0.8 MA Nl04: 1E20, stabilizes around 0.82 s Picrf: 2 MW + modulation Success - not sure yet what actual modulation index was, but did get modulation. Next Shot: ********** Increase modulation amplitude to 0.5 Vpp, changed range to 420-670 kHz per run plan, PCI phase plate engaged again. |
| Mar 9 2010 11:05:19:590AM | 1100226026 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** Lower slew rate Result: ******* Bt: 6 T Ip: 0.8 MA Nl04: 1E20, stabilizes around 0.82 s Picrf: MW ? Some question - lost power room data F_sweep range = [420 670] kHz Sweep Freq. = 1.11 Hz Slew Rate = 0.56 MHz/s Full-length plasma, low slew rate. Some peaks in response - analyze later. Next Shot: ********** Lower field - check scaling with Alfven TAE gap center. |
| Feb 26 2010 04:41:49:500PM | 1100226027 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** Lower field - check scaling with Alfven TAE gap center. Result: ******* Bt: 5.7 T Ip: 0.8 MA Nl04: 1.05E20 Picrf: 2 MW + modulation Full length plasma. Increased modulation amplitude 0.6 Vpp - two faults in D early on, but otherwise okay. Driving frequency runs from 350-850 kHz, 1.11 Hz sweep frequency. Next Shot: ********** H-mode shot, and scale down amplitude on Agilent to 0.55 Vpp. Run frequency modulation sweep from 300-900 kHz. |
| Feb 26 2010 04:53:04:510PM | 1100226028 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** H-mode based on 1100224006 Result: ******* Bt: 5.7 T Ip: 0.8 MA Nl04: 0.75E20 until H-mode Picrf: 1.3 MW - no D antenna. Frange = [300 900] kHz mod. amplitude = 0.55 Vpp sweep freq. = 1.11 Hz Full length plasma - two density blips toward end - H-modes. But no D-antenna - poor matching. Since we only have time for one more shot, Steve will try to base match off of a shot from the same run, 1100224018. Next Shot: ********** Same thing, try better matching on D antenna. |
| Feb 26 2010 05:10:52:580PM | 1100226029 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** H-mode based on 1100224006 Result: ******* Bt: 5.4 T Ip: 0.8MA Nl04: 0.75E20 + jumps to around 1.1E20 in H-mode Picrf: 1.3 MW Frange = [300 900] kHz mod. amplitude = 0.55 Vpp sweep freq. = 1.11 Hz Still didn't get D - one more time.... Next Shot: ********** Increase power to J antenna so that it can get plasma into H mode on its own. Increase density demand to 0.8. Keep modulation parameters. Steve adjusts D antenna to improve match. Awesome crew agrees to stay for another shot - big thank you! |
| Feb 26 2010 05:20:15:120PM | 1100226030 | Theodore Golfinopoulos | Shot Summary:
Goal: ***** H-mode based on 1100224006 Result: ******* Bt: 5.4 T Ip: 0.8 MA Nl04: 0.9E20 Picrf: Both J and D faulted. Frange = [300 900] kHz mod. amplitude = 0.55 Vpp sweep freq. = 1.11 Hz Full-length plasma. No H-mode, RF antennas fault. Next Shot: ********** is in the future. This was the last shot of the day. Thanks to everyone for staying late! |
| Physics Operator Comments | |||
| Feb 26 2010 08:04:01:270AM | Bill Rowan | load 1090915020
recalculate magnetics predictors load 1100225032 segment 1 That is a more recent cryo startup SL requested that BT be reduced to 5.4 T TF current demand reduced from 156400 to 150000 | |
| Feb 26 2010 09:08:39:600AM | 1100226001 | Bill Rowan | 001.
Cryo pump on PG1 (argon) enabled, 100 ms pulse starting at 0.4 Disruption at 0.14 s 2pi bolo indicates that something fell in BT = 5.5 T |
| Feb 26 2010 09:21:35:663AM | 1100226002 | Bill Rowan | 002.
No pcs changes Plasma full length nl_04 = 0.7 and flat |
| Feb 26 2010 09:42:06:217AM | 1100226003 | Bill Rowan | 003.
pg1 (argon) pulse from 0.4 to 1.4 aluminum injection for cold pulse at 1.4 Plasma full length Nothing observed on FRCECE at the al inj time |
| Feb 26 2010 09:59:27:580AM | 1100226004 | Bill Rowan | 004.
No PCS changes Plasma full length al inj evident on FRCECE |
| Feb 26 2010 10:13:29:287AM | 1100226005 | Bill Rowan | 005.
No PCS changes Move the aluminum injection to 0.7 to get it out of the way of the main experiment Plasma full length Aluminum injection evident. Also have Mo flakes for comparison |
| Feb 26 2010 10:37:26:437AM | 1100226006 | Bill Rowan | 006.
No PCS changes Plasma full length al injection was smaller although that was not the intent |
| Feb 26 2010 11:02:06:903AM | 1100226008 | Bill Rowan |
008 No PCS changes Plasma full length |
| Feb 26 2010 11:11:47:400AM | 1100226009 | Bill Rowan | 009.
2 ms increase in prefill 75 to 77 ms fiddling with hard x-rays -- not important to experiment Aluminum injection large Plasma full length |
| Feb 26 2010 11:16:23:403AM | 1100226009 | Bill Rowan | 009.
2 ms increase in prefill 75 to 77 ms fiddling with hard x-rays -- not important to experiment Aluminum injection large Plasma full length |
| Feb 26 2010 11:29:09:263AM | 1100226010 | Bill Rowan | 010.
No pCS changes Plasma full length |
| Feb 26 2010 11:46:18:563AM | 1100226011 | Bill Rowan | 011.
No pcs changes Plasma full length |
| Feb 26 2010 12:19:43:570PM | 1100226012 | Bill Rowan | 012.
No pcs changes Full length plasma PF fault. Breaker pulled. Inspection did not find anything. |
| Feb 26 2010 12:32:15:460PM | 1100226013 | Bill Rowan | 013
No pcs changes Full length plasma |
| Feb 26 2010 12:40:14:470PM | 1100226014 | Bill Rowan | 014.
No plasma No gas puff. |
| Feb 26 2010 12:53:14:093PM | 1100226015 | Bill Rowan | 015.
Full length plasma. No PCS changes |
| Feb 26 2010 01:24:05:833PM | 1100226016 | Bill Rowan | 016.
No PCS changes Delay due to cryo valve not operating. No repairs were made, however, helium began to flow Last shot for MP 502 |
| Feb 26 2010 01:42:22:840PM | 1100226017 | Bill Rowan | 017.
First shot for MP 590a This is a Hirex calibration shot -- specifically a locked mode shot suggested to Ted by John. Load from 1091208026, segment 03 is on. Reloaded segment 1 from 1100226015 Removed 2 ms of gas from prefill so down to 75 ms No power shot. |
| Feb 26 2010 02:01:42:203PM | 1100226018 | Bill Rowan | 018.
No PCS changes Full length plasma Locked mode as requested. Unusual because it locks and does not disrupt. |
| Feb 26 2010 02:27:33:860PM | 1100226019 | Bill Rowan | 019.
No PCS changes. Fizzle PF breaker fault well after the previous shot was done. |
| Feb 26 2010 02:27:47:377PM | 1100226020 | Bill Rowan | 020.
Reduce the prefill from 75 ms to 72 ms Disruption at 1.17 s |
| Feb 26 2010 02:42:09:423PM | 1100226021 | Bill Rowan | 021.
Loaded 1100122030. Segment 2 is on. Loaded segment 1 from 1100226020 Loaded power systems as on 1100122030. Plasma full length. |
| Feb 26 2010 03:01:31:633PM | 1100226022 | Bill Rowan | 022.
Increase argon for HIREX Increase B-side lower to 1.0 psi Ar Plasma ran full length -- most of the way through rampdown |
| Feb 26 2010 03:24:54:830PM | 1100226023 | Bill Rowan | 023.
Try changing the current ramp so that the current flat tops at 0.5 s rather than 0.565 s. IP demand flat top moved from 0.4 s to 0.35 s Lengthened argon pulse from 50 ms to 75 ms at request of Matt. Fizzle The measured prefill pressure was twice as high on this shot. Looks as if cryo was not operating properly. |
| Feb 26 2010 03:31:17:167PM | 1100226024 | Bill Rowan | 024.
No PCS changes Full length plasmaq |
| Feb 26 2010 03:38:52:817PM | 1100226024 | Bill Rowan | 024.
No PCS changes Full length plasma |
| Feb 26 2010 03:46:53:857PM | 1100226025 | Bill Rowan | 025.
No PCS changes. Full length plasma |
| Feb 26 2010 04:00:07:433PM | 1100226026 | Bill Rowan | 026.
No PCS changes Full length plasma |
| Feb 26 2010 04:22:09:193PM | 1100226027 | Bill Rowan | 027.
Reduced TF to 5.7 from 6.0 Reduced TF current to 158650 from 167000 Full length shot. BT = 5.76 T |
| Feb 26 2010 04:44:50:767PM | 1100226028 | Bill Rowan | 028.
Loaded 1100224006. Loaded 1100226027 segment 1 IP = 0.8 MA 2 small h-modes (1.34s and 1.53 s) |
| Feb 26 2010 04:59:04:190PM | 1100226029 | Bill Rowan | 029.
No PCS changes 4 small H-modes |
| Feb 26 2010 05:11:58:660PM | 1100226030 | Bill Rowan | 030.
nl_04 = 0.8e+20 Last shot. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:23:363AM | Plasma | Ok | |
| 2 | 09:15:52:580AM | Plasma | Ok | |
| 3 | 09:34:52:270AM | Plasma | Ok | |
| 4 | 09:49:18:193AM | Plasma | Ok | |
| 5 | 10:07:56:623AM | Plasma | Ok | |
| 6 | 10:26:48:880AM | Plasma | Ok | |
| 7 | 10:40:09:787AM | Plasma | Ok | |
| 8 | 10:53:53:927AM | Plasma | Ok | |
| 9 | 11:08:07:113AM | Plasma | Ok | |
| 10 | 11:24:46:663AM | Plasma | Ok | |
| 11 | 11:43:21:263AM | Plasma | Ok | |
| 12 | 11:58:12:657AM | Plasma | Ok | OH&EF1 com fault EF1 self Powered |
| 13 | 12:19:52:150PM | Plasma | Ok | |
| 14 | 12:36:00:683PM | Plasma | Bad | Gas fill ? |
| 15 | 12:49:30:560PM | Plasma | Ok | |
| 16 | 01:21:36:847PM | Plasma | Ok | |
| 17 | 01:39:03:520PM | Plasma | Bad | Igor critical fault |
| 18 | 01:54:32:383PM | Plasma | Ok | |
| 19 | 02:08:43:383PM | Plasma | Ok | |
| 20 | 02:22:58:307PM | Plasma | Ok | |
| 21 | 02:38:43:043PM | Plasma | Ok | |
| 22 | 02:58:19:240PM | Plasma | Ok | |
| 23 | 03:15:37:040PM | Plasma | Ok | |
| 24 | 03:28:50:087PM | Plasma | Ok | |
| 25 | 03:42:49:680PM | Plasma | Ok | |
| 26 | 03:57:51:167PM | Plasma | Ok | |
| 27 | 04:19:02:173PM | Plasma | Ok | |
| 28 | 04:39:10:353PM | Plasma | Ok | |
| 29 | 04:54:28:073PM | Plasma | Ok | |
| 30 | 05:09:00:733PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Feb 26 2010 09:01:41:177AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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