| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch,Stewart Zweben,Howard Yuh |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Bill Cochran,Bill Parkin,Ed Fitzgerald |
| Engineering Operator Run Comment |
| MP281 Edge Turbulence Imaging, MP215 Jport, MP259 MSE calibration: PO:Wo |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:27:587PM |
| Author: To Be Determined |
| Session Leader run summary -- first half of 1010720 PO Wolfe SL Zweben Miniproposal 281 Edge Turbulence Imaging The first half of the 7/20/01 run was for edge turbulence imaging measurements using the Princeton Scientific Instruments Ultra-Fast Camera (PSI-3), which can take 12 successive frames up to 1 million frames/sec. Discharge conditions were set to match the baseline case for which edge profiles are available and theoretical simulations are being done by Hallatschek and Rogers. Very nice image data were obtained on 9 shots today, including: Shots 2,4,7 - normal case with D gas puff at 10 psi, good images Shots 5,6 - same as above but with 20 psi, makes brighter images Shots 8 - increased outer gap, see emission region move in, 10 psi Shots 9 - same as 8 but increased to 20 psi, makes brighter images Shot 10 - same as 8, but switch to He puff at 20 psi with HeII filter (468.6 nm), see emission farther in, but dim, with waves apparently propagating in opposite direction as before Shot 11 - same as 10 but 30 psi, perhaps see directions of poloidal propagation reverse vs. radius (shear layer ?) |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:13:927PM |
| Author: To Be Determined |
| Physics Operator Summary for Friday, July 20, 2001 MP281 Edge Turbulence Imaging: SL=Zweben (4-8 shots) MP215 Jport SL=Wukitch, Piggyback on Zweben shots, then continue if warranted. MP259 MSE calibration: SL=Yuh/Rowan (beam into gas with Bt, EF4) 10 "shots" PO: wolfe EO: Fitzgerald,Cochran,Parkin Started from 1010622006,(1MA,5.4T,.85e20/m2) with density feedback switched to NL_04 and a chopper program voltage of 100V in seg1 and 2 (see Ian's report from 1010719). Otherwise seg1 is from 1010719022. The plan is to get turbulence measurements with the PCI ultra-fast camera. After a series of shots with constant conditions, we will increase the outer gap to extend the camera viewing volume further into the SOL. Overnight, the RF group identified a loose connection on DC2 as a likely cause for the low signal levels on that probe. This morning they connected the current probes to use for phase balance protection instead of the voltage probes, which are located near a voltage minimum rather that at a maximum for 70MHz; it is hoped that these changes will improve the J-port performance. Shot#1 disrupted early because the chopper was not enabled. Aside from that, everything ran well. The imaging run worked well. Shots#2-11 were good shots. Stewart ended up getting data with both D2 and He puffs, with Dalpha and He+ filters. For the last several shots (d and he) we moved the LCFS in by 1cm and got a view further into the SOL. The helium data showed rotation in the opposite direction further inside, with smaller features. Images were taken at 0.7sec. Jport got up to 1MW, with minor faulting. RF started at 1sec. Bruce and Brian tried the flappers and modulated the density. This caused some difficulties for the RF tuning so they turned them back off for #10-11. The MP259 MSE calibration, beam-into-gas with fields experiment started with shot #12. Supplies and gas were run under hybrid control, seg 1 only, with the fizzle detector set at .35sec. TF and EF4 were run for these shots. Three shots (#24-26) were run with EF3 as well, to increase the Bz to ~.7T. These were also done with hybrid control, using wire 8 for an ic_ef3 wire. The final two shots (#27-28) were beam into gas and nothing into gas for DNB system. Scorecard --------- Duds 0 Tests 17 (beam-into-gas with and without field) Fizzles 0 Plasmas 11 (including one powersystems-induced .2sec disruption) ------- -- Shots 28 |
| Session Leader Comments |
| Physics Operator Comments | |||
| Jul 19 2001 05:45:56:173PM | Steve Wolfe | Preparing first shot for Friday- Use seg1 from 1010719022 note: Br0=.002, IC_EF4=-1300, pg4=18msec change chopper voltage from 150 to 100V Use seg2 from 1010622006, change to nl_04 feedback =8.5e19 copy chopper voltage from seg1 Save as pcs$wolfe 1010720000 Note: Ian's change in chopper idle voltage from 0 to 150V to lower the average current from ~2000a seems to be a good thing. I'm dropping this to 100V to get a little more current, aiming for 1400-1500a, which should increase the dynamic range a bit, since the supply can exceed 2500 at the top of a chop, but can't go negative. Note that if both segments do not agree on this voltage there can be a jump at segment switch, which probably wouldn't hurt too much but ... | |
| Jul 20 2001 07:21:41:220AM | Steve Wolfe | Run (if you can call it that) Plan and Engineering Setup for Friday, July 20 MP281 Edge Turbulence Imaging: SL=Zweben (4-8 shots) MP215 Jport SL=Wukitch, Piggyback on Zweben shots, then continue if warranted. MP259 MSE calibration: SL=Yuh/Rowan (beam into gas with Bt, EF4) 10 "shots" PO: wolfe ECDC in D2 overnight, stopping by 8:00 am. Run begins at 09:00 and ends at 17:00 or sooner Power systems the same as for shot 1010717016. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) fill J-Bottom with 30 psi He Hybrid DISABLED(PG5) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV RF STATUS: Transmitters 1 and 2 in standby at 08:00. Transmitters 3 and 4 in run-on started at 07:30. Run Plan: --------- Run a series of ohmic shots (at least 4) similar to 1010622006, 1MA, 5.3T, nl4=.85e20. Use TCI feedback instead of Nl_ZMETER. Zweben is interested in the time around 0.7 seconds, so the RF should try to avoid that time. RF plans to make some modifications to the Jport control signals before the run. These will be tested during plasma operation. When we are finished with the imaging and J-port bashing, we will begin MP259 beam-into-plasma with TF and vertical field only (No Plasmas). Engineering setup for MP259: ----------------------------- Fizzle detector should be moved to +0.35sec TF start time to -0.9sec, invert at +0.40, TF fizzle delay to zero. EF4 start time at -1.1sec, invert at +0.40 All other supplies off. B-top valve hybrid enabled, all others disabled. Shots will be run under hybrid control, using segment 1 only. Beam should be at full energy (49kV) Use pg4 pre-puff to raise torus pressure to 1mTorr at 0.2 - 0.3sec (estimate 400msec pulse width) Two sets of TF are requested, 5.3T and 4.5T. For each, EF4 currents of -1, 0, 1, 3, and 5 kA are requested. These shots should be operated with a Bt flattop during the 100ms beam pulse. The beam plans on being fired at 200ms, so a Bt flattop from 190ms to 310ms would be acceptable. One successful shot for each pitch angle should be sufficient. The rep rate for these shots should be much higher than plasma shots, so if all goes well we may finish before 17:00. At the conclusion of the run, we will begin glow cleaning in He, which will be continued until Sunday afternoon, when a fresh boronization will begin. The object of this is to reduce the H/D ratio to more acceptable levels. | |
| Jul 20 2001 09:43:35:537AM | Steve Wolfe | Load prepared starting shot 07:24 coldstart - all matrices respond. | |
| Jul 20 2001 09:52:34:437AM | 1010720001 | Steve Wolfe | shot#1: No ecdc after J vacuum tests; we'll see. early disruption. CHopper problem; wasn't enabled at PLC. fast current rise, bouncer; pressure is a little low, it should come up by itself next shot. Bz and Br a tad negative, but it went, so I'll keep fields as they are. next shot: try again, no PCS change |
| Jul 20 2001 10:06:00:410AM | 1010720002 | Steve Wolfe | shot#2: try again, no PCS change plasma, full length. got some dithers after 1sec. J-port at .35MW starting at 1sec. another bouncy startup, with some runaways pressure still too low (.05mTorr) Stewart says data look good, wants another. next shot: dnb will fire at 0.5, so I'm still not going to raise pg4 |
| Jul 20 2001 10:35:47:350AM | 1010720003 | Steve Wolfe | shot#3: dnb will fire at 0.5, so I'm still not going to raise pg4 late disruption 1.56sec. Injection seems to come at 1.55 No video data??? No puff from NINJA? NINJA puff was there, camera looks like background. P0 up to .065, doesn't bounce and runaways are gone, but I should probably raise it a little. next shot: raise pg4 to 20msec from 18 |
| Jul 20 2001 10:54:36:167AM | 1010720004 | Steve Wolfe | shot#4: raise pg4 to 20msec plasma full length jport at .8MW, raises halpha, off at 1.3. Stewart got data; he will raise plenum pressure next shot I'm seeing single sample noise spikes on the hybrid outputs, maybe some on other signals as well. next shot: stewart raises plenum pressure, RF will try for more power |
| Jul 20 2001 11:05:26:303AM | 1010720005 | Steve Wolfe | shot#5: stewart raises plenum pressure, RF will try for more power plasma full length, stewart got data. Density rises with the ninja puff, reaches 1.0e20 by 1sec RF faults out early, .5MW next shot: repeat |
| Jul 20 2001 11:21:46:323AM | 1010720006 | Steve Wolfe | shot#6: repeat plasma full length stewart got his data; will reduce plenum pressure back to 10psi little injections at .2 and .61 little h-mode at 1.15? RF has a short 0.8MW pulse at 1.1-1.16. Blip and Blab are flapping for most of the pulse, density is modulated next shot: imaging at lower plenum pressure; no PCS changes. flappers to .75sec |
| Jul 20 2001 11:36:09:543AM | 1010720007 | Steve Wolfe | shot#7:imaging at lower plenum pressure; no PCS changes. flappers to .75sec, after SZ data time. plasma full length. Stewart gor his data RF ramps to .8MW, then faults. Same density/halpha behavior as before. next shot: increase outer gap by 1cm until .75sec, should be the same after 0.9 |
| Jul 20 2001 12:07:15:283PM | 1010720008 | Steve Wolfe | shot#8:increase outer gap by 1cm until .75sec, RCUR from .664->.659 back to .664 at 0.9sec. plasma full length. It had some vertical issues, but survived. a couple of injections 1.26,1.37. flappers are modulating density RF is similar. next shot: repeat. |
| Jul 20 2001 12:17:47:480PM | 1010720009 | Steve Wolfe | shot#9: repeat. plasma, full length. SZ got data. RF is faulting. next shot: repeat with Helium in the plenum, He filter on the camera. (The beam isn't quite ready for their part of the run). |
| Jul 20 2001 12:36:21:707PM | 1010720010 | Steve Wolfe | shot#10:repeat with 20psi Helium in the plenum, HeII filter on the camera. (The beam isn't quite ready for their part of the run). disrupted in rampdown 1.66. injection RF stayed on at .8 SZ sess opposite rotation further in. excitement all round, he'll get another shot at 30psi He plenum pressure |
| Jul 20 2001 12:54:16:010PM | 1010720011 | Steve Wolfe | shot#11: repeat at 30psi he in the NINJA; density will be higher. plasma disrupted in rampdown 1.56. looks like it may have sharkfinned? RF got to 1MW from Jport. SZ got ggood data. This completes the plasma part of the run We will now begin the MP259 beam into gas with fields. |
| Jul 20 2001 01:27:31:263PM | 1010720012 | Steve Wolfe | shot#12: turn off seg2, program only tf=-150e3,ef4=-1000,pg4=[-.9,-.5]in seg1. fizzle detector to .35, btop only enabled. supplies went as programmed, beam fired, pressure ~1.15 at .2 to .3sec next shot: increase puff to 500msec aim for 1.5mTorr, turn off EF4 (0 current point) |
| Jul 20 2001 01:35:16:680PM | 1010720013 | Steve Wolfe | shot#13: increase puff to -.9:-.4, aim for 1.5mTorr, turn off EF4 (0 current point) supply went as programmed, p(.2)=1.45mTorr next shot: EF4=+1000a |
| Jul 20 2001 01:55:40:063PM | 1010720014 | Steve Wolfe | shot#14: EF4=+1000a, TF=-150e3 resistance temp on ef4's was -215 before the shot; relay problem? supplies ran as programmed. gas ok. beam ok. Howard says there is a funny bump in his data. next shot: repeat |
| Jul 20 2001 02:05:26:543PM | 1010720015 | Steve Wolfe | shot#15: repeat EF4=+1000a, TF=-150e3 supplies ran as programmed, Bz=.056 (vacbrbz) gas ok. beam ok. HY's signals ok next shot: EF4 to +3kA |
| Jul 20 2001 02:16:21:070PM | 1010720016 | Steve Wolfe | shot#16: EF4=+3000a, TF=-150e3 supplies ran as programmed. gas ok. beam faulted. Bz=185mT next shot: repeat |
| Jul 20 2001 02:28:42:290PM | 1010720017 | Steve Wolfe | shot#17: repeat EF4=+3000a, TF=-150e3 supplies ran as programmed, gas ok, beam ok next shot: +5kA on EF4 |
| Jul 20 2001 02:41:53:960PM | 1010720018 | Steve Wolfe | shot#18: EF4=+5000a, TF=-150e3 got 4955a, probably on the plc rail. data look good. Bz=312mT next shot: EF4=+5000a, TF=-127e3 |
| Jul 20 2001 03:03:50:127PM | 1010720019 | Steve Wolfe | shot#19: EF4=+5000a, TF=-127e3 supplies ran as progrmmed (4955 on ef4) Bz=313mT, Bt=4.5T data ok. next shot: EF4 to 3000A |
| Jul 20 2001 03:10:39:620PM | 1010720020 | Steve Wolfe | shot#20: EF4=+3000a, TF=-127e3 begin setting up to run ic_ef3 control on last shots to add field supplies ran as programmed,bz=185mT gas ok. data ok next shot: EF4 to +1kA |
| Jul 20 2001 03:22:19:617PM | 1010720021 | Steve Wolfe | shot#21: EF4=+1000a, TF=-127e3 supplies ran as programmed. Bz=.057T. gas looks ok. beam arced need to repeat this one. next shot: repeat |
| Jul 20 2001 03:35:16:083PM | 1010720022 | Steve Wolfe | shot#22:repeat EF4=+1000a, TF=-127e3 supplies as requested, beam ok next shot: EF4 to zero |
| Jul 20 2001 03:48:42:960PM | 1010720023 | Steve Wolfe | shot#23: EF4=off, TF=-127e3 tf ran as programmed. data look good to Howard. next shot: EF3=+6000, EF4=+5000, tf=-127e3 |
| Jul 20 2001 04:03:56:400PM | 1010720024 | Steve Wolfe | shot#24: EF3=+6000, EF4=+5000, tf=-127e3 ic_ef3 setup on wire 8. supplies ran as programmed. no beam. Bz ramps from .683 to .698T next shot: repe, raise gain on ic_ef3 from 5.5 to 9, increase controller from .01 to .019 |
| Jul 20 2001 04:13:14:097PM | 1010720025 | Steve Wolfe | shot#25:repeat EF3=+6000, EF4=+5000, tf=-127e3 raise gain on ic_ef3 from 5.5 to 9, increase controller from .01 to .019 supplies ran as requested, ef3 looks flatter this time. bz=.705 to .715, that could be field penetration; current looks flat next shot: tf back to -150e3 |
| Jul 20 2001 04:26:41:190PM | 1010720026 | Steve Wolfe | shot#26:EF3=+6000, EF4=+5000, tf=-150e3 supplies ran as programmed. got a beam got gas. data look ok. next shot: gas only for Rowan & Eisner |
| Jul 20 2001 04:34:11:090PM | 1010720027 | Steve Wolfe | shot#27: gas only for Rowan & Eisner got gas. got beam. next shot: gas only, no beam |
| Jul 20 2001 04:46:36:010PM | 1010720028 | Steve Wolfe | shot#28: gas only, no beam got gas. got a non-beam. That's all. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:44:36:977AM | Plasma | Bad | EFC chopper was not reset |
| 2 | 09:57:47:820AM | Plasma | Ok | |
| 3 | 10:15:42:183AM | Plasma | Ok | |
| 4 | 10:37:38:367AM | Plasma | Ok | |
| 5 | 10:56:46:043AM | Plasma | Ok | |
| 6 | 11:13:01:860AM | Plasma | Ok | |
| 7 | 11:26:11:453AM | Plasma | Ok | |
| 8 | 11:57:29:897AM | Plasma | Ok | |
| 9 | 12:11:34:443PM | Plasma | Ok | |
| 10 | 12:27:44:353PM | Plasma | Ok | |
| 11 | 12:46:33:327PM | Plasma | Ok | |
| 12 | 01:18:39:287PM | Plasma | Ok | MP259 |
| 13 | 01:30:12:503PM | Plasma | Ok | MP259 |
| 14 | 01:46:13:787PM | Plasma | Ok | mp259 |
| 15 | 01:58:44:113PM | Plasma | Ok | MP259 |
| 16 | 02:11:11:347PM | Plasma | Ok | MP259 |
| 17 | 02:23:46:673PM | Plasma | Ok | MP259 |
| 18 | 02:36:28:797PM | Plasma | Ok | MP259 |
| 19 | 02:52:22:253PM | Plasma | Ok | MP259 |
| 20 | 03:05:23:190PM | Plasma | Ok | MP259 |
| 21 | 03:18:04:597PM | Plasma | Ok | MP259 |
| 22 | 03:30:35:877PM | Plasma | Ok | MP259 |
| 23 | 03:43:22:733PM | Plasma | Ok | MP259 TF only |
| 24 | 03:55:50:983PM | Plasma | Ok | MP259 TF, EF-3, & EF-4 |
| 25 | 04:08:15:107PM | Plasma | Ok | MP259 TF. EF-3, & EF-4 |
| 26 | 04:20:45:933PM | Plasma | Ok | MP259 TF, EF-3, & EF-4 |
| 27 | 04:31:49:307PM | Test | Ok | MP 259 No power, just gas puff |
| 28 | 04:41:57:003PM | Test | Ok | MP259 gas only |