| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Sam Pierson,Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| MP#570 - Boundary layer heat transport experiments in L-mode plasmas EO |
| Session Leader Plans |
| Entered: Oct 6 2009 04:21:32:150PM |
| Author: Brian Labombard |
| Run Plan for 1091007
MP#570 - Boundary layer heat transport experiments in L-mode plasmas Goal Our primary goals today are: (1) obtain good IR footprints on the outer divertor for a variety of currents and RF powers and (2) explore the dependence of the IR footprint on the strike-point location being below or above the outer divertor 'nose'. Setup Reload from shot#1090923026. This was a NL04 ~ 0.68e20, 0.8 MA, 5.4 tesla shot with a sweep programmed into RXL. Remove the RXL sweep, programming instead a fixed RXL value corresponding to the time of 0.7 seconds in this shot. At this time, the strike point was at probe#4 on the outer divertor. Program 0.5 MA, NL04 ~ 0.4e20 with cross-over glitch controller engaged. All shots will be 5.4 tesla. A. 0.5 MA, NL04~0.4e20 1. RF power scan Step up RF power shot-by-shot in 0.5 MW increments, starting from 0 MW Program RF pulse from 0.5 to 1.5 seconds Truncate RF power scan when non-stationary H-modes result. 2. Full strike-point sweep Pick best shot from above. Load RXL sweep from shot#1090923026. Take 2 shots. Probe#8 should map full profile into private flux region. B. 0.8 MA, NL04~0.8e20 1. RF power scan Repeat A1 at these parameters. 2. Full strike-point sweep Pick best shot from B1. Load RXL sweep from shot#1090923026. Take 2 shots. Probe#8 should map full profile into private flux region. 3. IR footprint with strike-point above the 'nose' Remove RXL sweep, programming a fixed RXL value corresponding to the time of 1.25 seconds. At this time, the strike point was just above probe#8 (nose) on the outer divertor. Pick 2 of the best shots from B1 to repeat in this configuration. C. 1.1 MA, NL04~1.2e20 1. RF power scan Repeat A1 at these parameters. 2. Full strike-point sweep Pick best shot from C1. Load RXL sweep from shot#1090923026. Take 2 shots |
| Physics Operators Plans |
| Entered: Oct 6 2009 03:32:00:727PM |
| Author: Steve Wolfe |
| -----------------
Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1090923026 **EXCEPT: Change crowbar times on oh1,oh2u,oh2l from .12 to .08sec ** 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 D2 DISABLED Enable gatevalves and shutters: ECE, VUV, Z-bolo, HIREX_SR Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): YES in Helium ICRF(yes/no): yes LH(yes/no): no DNB(yes/no): No Cryopump (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: He at 5e-5 Torr sweep: 44/45/103 cm scan: 20/120 s ----------------------------------------------------- Physop plan: According to the SL plan, the goals for the day are to get good IR camera footprints at different currents and RF powers, and to explore the dependence of the footprint on the whether the strike point is above or below the nose. A.1 The first case is 5.5T, 0.5MA, nl04=0.4e20. SL wants gaps like 1090923026, with strike point fixed as at 0.7sec on that shot. This means I'll need to change Ip, NL04, and RXL (as well as all the magnetics predictors thanks to the F15 lossage). I'll also use some Ip programming in seg1 as on 1090904006, maybe crowbar at .8sec to reduce the Ip overshoot. Turn on oh1_crossover routine. I expect we'll need some tuning on the rxl and zxl to get the strike steady and set up the gaps for the probe scans. Once that's done, SL wants an rf power scan, in 0.5MW increments. A.2 Pick a power from A.1 and put back the rxl programming from 1090923026 to sweep past the nose. SL plan calls for two shots, but it will probably take more. B.1 Raise current and nl04 to 0.8MA, 0.8e20, with fixed strike point as on A.1. Remove seg1 IP program and put crowbar back to 120msec. Turn off oh1_crossover routine. Tweak up gaps and xpoint, then repeat RF scan as in A.1 B.2 Put back rxl sweep, using best(?) rf case from B.1 scan B.3 Take fixed strike as at t=1.25sec (above the nose) and do fixed footprints at that location. C.1 Go to 1.1MA, 1.2e20 and repeat the A.1 power scan (after suitable gap and strike tuning) C.2 Put back the sweep, as for previous cases. |
| Session Leader Summaries |
| Entered: Oct 8 2009 12:46:42:007PM |
| Author: Brian Labombard |
| Run Summary for 1091007
MP#570 "Boundary layer heat transport experiments in L-mode plasmas" Substantial progress was made on the ambitious run plan, which focused on two principal 'must dos': (1) obtain good-quality IR images of the divertor footprint, using a fixed strike-point program and scanning plasma current and input power and (2) sweep the heat flux footprint across divertor Langmuir probes, including probe#8 on the divertor 'nose.' We started with low-density (NL04~0.4e20), low current (0.5 MA) plasmas, attempting to step up the ICRF power shot-by-shot from 0 to 1.5 MW. It was discovered early on that the A-port scanning probe was damaged -- two electrodes shorted to the head. The last time we had poked that probe was during a probe-induced plasma disruption (1090923 run). So the damage must have occurred then. Pushing on, we took repeat shots as needed to optimize the IR images. On shot#4, the images revealed evidence of damage to the ramped tiles on the J-divertor module. In particular, there appears to be some irregular surface (melt droplets?) near the trailing edges of the lower set of 3 tiles. These appear as bright spots in the IR image. For later shots, we avoided lighting up these areas by programming the strike point to be on tile#4. By shot 11, we completed the 0.5 MA data set for the IR system. H-modes started to appear late in the discharge at the 1.5 MW level. There were numerous delays that slowed down the shot cycle -- lab access to fix Thomson and repeated problems with storing the tile and calorimeter thermocouple data from a cPCI unit at F-port. Initially it was thought that RF pickup might be causing this problem. But later shots without RF showed no improvement. On shot 10 the dying A-port probe was put out of its misery. It got hit with a combination of runaways plus 1.5 MW of ICRF, fusing the remaining two electrodes. From this point on, we recorded upstream plasma profiles from the inner-wall WASP probe (very far upstream). This probe functioned quite well up until the 1.5 MW ICRF shots at 0.8 MA, when we turned it off because of overheating concerns. We returned to strike-point sweeping for one shot at 0.5 MA (12), mapping out the footprint nicely on probe#8. Next were 0.8 MA shots. Things proceeded reasonable well, finishing the power scan on shot#23 at the 1.5 MW level. This shot had multiple H-modes ending in a steady EDA. There were a bunch of no-power shots and a dud mixed in (13-16), initiated by the data storage problem on the cPCI unit at F-port. Shot#24 was a strike point sweep at 0.8 MA, yielding nice profile data. Shot#25 was another fixed strike-point shot for IR data, but with the strike point above the outer divertor nose. Both of these were with 0.5 MW ICRF. Finally we turned to 1.1 MA discharges. Shots 26 and 27 were with zero and 0.5 MW ICRF. At this parameter range, H-modes started to bubble up everywhere affecting the IR interpretation. So we didn't push this further. We ended the run with two plasmas (28,30) where the strike point was scanned up the divertor plate. On shot 28, the sweep didn't go far enough but on shot#30 it did (actually a bit too far), yielding very nice data to leave on the drum -- if you don't mind the disruption. Shot Log: 1-LSN, 5.4 tesla, NL04~0.4, no probes scanning Ohmic only IR camera not on No NINJA puff 2-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Ohmic only ASP SW and NW electrodes are shorted to probe head - must have been that disruption on the last shot of the 1090923 run IR camera on, weak signals 3-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW ASP cleans up on last scan - NE and SE working only. IR camera saturated Next: repeat 4-Fizzle Lab access to work on Thomson system 5-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW from E Looks like the ramped tiles have damage on their trailing edges, on the third tile and below. Next: program fixed strike point on lower portion of tile#4 6-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW from E IR camera still needs tweaking Next:repeat 7-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW from E Tile TC data not recorded Next:1.0 MW 8-fizzle 9-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 1.0 MW from E L-H at 1.43 seconds good IR data Next:1.5 MW 10-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 1.5 MW (E+D) ASP takes a hit - could be runaways - shorts out remaining electrodes L-H at 1.35 seconds IR data saturated ASP is off now. 11-LSN, 5.4 tesla, NL04~0.4, WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 1.5 MW (E+D) L-H at 1.36 Next: go to strike point sweep with 0.5 MW RF 12-LSN, 5.4 tesla, NL04~0.4, WASP(rho=-1) @ 0.6, 0.95, 1.3 Strike point sweep Prf = 0.5 MW (E+D) Probe#8 maps out heatflux profile Next: go to 0.8 MA, NL04~0.8 A bunch of data system hang-ups, no power shots. 17-LSN, 5.4 tesla, 0.8 MA, NL04~0.75, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point No RF Some IR saturation 18 - fizzle 19-LSN, 5.4 tesla, 0.8 MA, NL04~0.63, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point No RF IR data ok Next 0.5 MW RF 20-LSN, 5.4 tesla, 0.8 MA, NL04~0.65, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point Prf = 0.5 MW (E) L-H at 1.36 seconds IR camera ok Next 1.0 MW RF 21-LSN, 5.4 tesla, 0.8 MA, NL04~0.67, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point Prf = 1.0 MW (E) L-H at 1.32 seconds IR camera saturated at strike point. Next: repeat 22-LSN, 5.4 tesla, 0.8 MA, NL04~0.65, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point Prf = 1.0 MW (E) L-H at 1.31 seconds IR camera ok No Thomson data WASP is getting hot - turn it off for these RF power levels Next: 1.5 MW 23-LSN, 5.4 tesla, 0.8 MA, NL04~0.8 in L-mode, no probes scanning Fixed strike point L-H transitions, last one is EDA Prf = 1.5 MW (E+D) IR camera ok Next: 0.5 MW with strike point sweep Go to strike point sweep 24-LSN, 5.4 tesla, 0.8 MA, NL04~0.62, WASP(rho=-2) @ 0.6, 0.95, 1.3 Strike point sweep. Prf = 0.5 MW (E) Fixed strike point above the nose 25-LSN, 5.4 tesla, 0.8 MA, NL04~0.61, no probes scanning Prf = 0.5 MW (E) Nice IR footprint Probe#8 maps profile early. Next: 1.1 MA, no RF Fixed strike point below the nose 26-LSN, 5.4 tesla, 1.1 MA, NL04~1.1, no probes scanning no RF Nice IR footprint. Nose has reflection,but it can be subtracted. Next: add 0.5 MW RF 27-LSN, 5.4 tesla, 1.1 MA, NL04~1.1, no probes scanning Prf = 0.5 MW (E) Good IR footprint LHLH then H at 1.3 seconds Next: strike point sweep, No RF 28-LSN, 5.4 tesla, 1.1 MA, NL04~1.15, WASP(rho=0) @ 0.6, 0.95, 1.3 No RF power WASP needs to be deeper Tile TC signals hung up again on this no RF shot. - so much for RF pickup theory Sweep needs to go further beyond the nose. Next: repeat, lower density to NL04~1, WASP deeper 29 - fizzle 30-LSN, 5.4 tesla, 1.1 MA, NL04~1, WASP(rho=-1) @ 0.6, 0.95, 1.3 No RF power Nice mapping of heat flux profile across probe#8 WASP records pressure profile on first scan. |
| Physics Operator Summaries |
| Entered: Oct 7 2009 06:09:39:680PM |
| Author: Steve Wolfe |
Physop Summary for Wed. Oct 7, 2009
MP#570: Heat flux footprints
SL: Labombard
PO: wolfe
EO: Pierson, Cochran, Dekow
This was a pretty successful run. We accomplished almost
all of the run plan, although we only took 2 points on the
fixed strike power scan at 1.1MA, devoting the last shots to
getting the sweep around the nose at this current.
Because of a PLC problem, we ended up not getting any ECDC
last night. It's not clear if that caused any problems or not.
There was no problem getting down to the requested 4e19 density
for the initial shots, although we did have a few early injections
(flakes?) that caused some early current rise disruptions in the
first couple of hours of the run.
I started with oh crowbars at 0.08sec and current programming in
segment 1 to keep from overshooting too far on a target current
of 500kA. This was moderately successful. I also made some cosmetic
adjustments to better match the rcur and zcur across the seg switch,
but for these shots there wasn't really any problem at the transition
anyway. As expected, setting the rxl and zxl trajectories in order
to hold the outer strike point fixed took a few shots, but this was
done to JT's satisfaction by shot#9 for the 0.5MA case.
To my surprise, it was not necessary to do much to this programming
to hold the same strike point at the higher currents of 0.8 and 1.1MA
I made a tiny adjustment on shot#18 for 800kA, no changes at 1.1MA.
The low density low current shots eventually developed runaway problems
and I needed to re-introduce a pg3 puff in seg1. The higher current
cases were at higher density and the runaways pretty much stayed away.
The sweeps from 1090923026 (rxl and zxl) worked ok at 500kA and 800kA
(ehich is where they came from), but for the 1.1MA case Brian wanted
the sweep extended a little farther. The sweeps at 1.1MA (#28,30) both
ended in disruptions right at or after EOF. The first may have been
due to railing oh2U, the second went vertically unstable, probably
due to the extreme xpoint sweep. All the other plasmas ran full length.
We lost considerable time to computer problems, including a long
delay and a couple of no-power shots between #12 and #17, and
some shorter delays to recover data from one of Brian's cpci dt196
modules that kept getting hosed. Note that shot#13 was attempted twice
but ended up as no-power shots both times, and somehow got data
stored in the pulse file that came from shot#12, so it shows up as a
successful shot in the run_summary program. Shots 14 and 15 were also
no-power (14 never actually existed), and 16 was a power supply dud
resulting from a PLC problem after the dispatcher got fixed.
Density control seemed to be improved by using D gain of 6
for the whole flattop; I reduced the P down to 7 for the
lower density, then put it back to 9 and 8 at the higher current 1.2e20
case.
The mflux bz0 signal showed positive excursions as noted on 1090925,
though perhaps not as large. These were ignored.
Scorecard:
No power 3
Duds 1 (no oh's ef1's)
fizzles 2
plasmas 24 (#4 and 8 were < 100msec)
======== ==
Shots 30 (counting 14 which never happened)
|
| Session Leader Comments | |||
| Oct 7 2009 09:10:52:770AM | 1091007001 | Brian Labombard | 1-LSN, 5.4 tesla, NL04~0.4, no probes scanning Ohmic only IR camera not on Next: repeat with camera and probes |
| Oct 7 2009 09:32:41:647AM | 1091007002 | Brian Labombard | 2-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Ohmic only ASP SW and NW electrodes are shorted to probe head - must have been that disruption on the last shot of the 1090923 run IR camera on, weak signals |
| Oct 7 2009 09:43:13:227AM | 1091007003 | Brian Labombard | 3-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW ASP cleans up on last scan - NE and SE working only. IR camera saturated Next: repeat |
| Oct 7 2009 09:58:55:320AM | 1091007004 | Brian Labombard | 4-Fizzle Lab access to work on Thomson system - labview software problem? |
| Oct 7 2009 10:25:04:427AM | 1091007005 | Brian Labombard | 5-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW from E Looks like the ramped tiles have damage on their trailing edges, on the third tile and below. Next: program fixed strike point on lower portion of tile#4 |
| Oct 7 2009 10:35:23:490AM | 1091007006 | Brian Labombard | 6-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW from E IR camera still needs tweaking Next:repeat |
| Oct 7 2009 10:43:39:270AM | 1091007007 | Brian Labombard | 7-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 0.5 MW from E Next:1.0 MW |
| Oct 7 2009 11:32:09:977AM | 1091007009 | Brian Labombard | 9-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 1.0 MW from E L-H at 1.43 seconds good IR data Next:1.5 MW |
| Oct 7 2009 11:59:57:037AM | 1091007010 | Brian Labombard | 10-LSN, 5.4 tesla, NL04~0.4, ASP(+5),WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 1.5 MW (E+D) ASP takes a hit - could be runaways - shorts out remaining electrodes L-H at 1.35 seconds IR data saturated Next:repeat |
| Oct 7 2009 12:01:05:820PM | 1091007011 | Brian Labombard | ASP is off-line now. 11-LSN, 5.4 tesla, NL04~0.4, WASP(rho=-1) @ 0.6, 0.95, 1.3 Prf = 1.5 MW (E+D) L-H at 1.36 Next: go to strike point sweep with 0.5 MW RF |
| Oct 7 2009 12:18:28:910PM | 1091007012 | Brian Labombard | 12-LSN, 5.4 tesla, NL04~0.4, WASP(rho=-1) @ 0.6, 0.95, 1.3 Strike point sweep Prf = 0.5 MW (E+D) Probe#8 maps out heatflux profile Next: go to 0.8 MA, NL04~0.8 |
| Oct 7 2009 02:06:45:723PM | 1091007017 | Brian Labombard | 17-LSN, 5.4 tesla, 0.8 MA, NL04~0.75, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point No RF Some IR saturation |
| Oct 7 2009 02:18:32:820PM | 1091007019 | Brian Labombard | 19-LSN, 5.4 tesla, 0.8 MA, NL04~0.63, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point No RF IR data ok Next 0.5 MW RF |
| Oct 7 2009 02:33:05:677PM | 1091007020 | Brian Labombard | 20-LSN, 5.4 tesla, 0.8 MA, NL04~0.65, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point Prf = 0.5 MW (E) L-H at 1.36 seconds IR camera ok Next 1.0 MW RF |
| Oct 7 2009 02:51:17:363PM | 1091007021 | Brian Labombard | 21-LSN, 5.4 tesla, 0.8 MA, NL04~0.67, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point Prf = 1.0 MW (E) L-H at 1.32 seconds IR camera saturated at strike point. Next: repeat |
| Oct 7 2009 02:59:55:990PM | 1091007022 | Brian Labombard | 22-LSN, 5.4 tesla, 0.8 MA, NL04~0.65, WASP(rho=-1) @ 0.6, 0.95, 1.3 Fixed strike point Prf = 1.0 MW (E) L-H at 1.31 seconds IR camera ok No Thomson data WASP is getting hot - turn it off for these RF power levels Next: 1.5 MW |
| Oct 7 2009 03:11:26:930PM | 1091007023 | Brian Labombard | 23-LSN, 5.4 tesla, 0.8 MA, NL04~0.8 in L-mode, no probes scanning Fixed strike point L-H transitions, last one is EDA Prf = 1.5 MW (E+D) IR camera ok Next: 0.5 MW with strike point sweep |
| Oct 7 2009 04:10:17:910PM | 1091007024 | Brian Labombard | 24-LSN, 5.4 tesla, 0.8 MA, NL04~0.62, WASP(rho=-2) @ 0.6, 0.95, 1.3 Strike point sweep. Prf = 0.5 MW (E) |
| Oct 7 2009 04:11:52:820PM | 1091007025 | Brian Labombard | Fixed strike point above the nose 25-LSN, 5.4 tesla, 0.8 MA, NL04~0.61, no probes scanning Prf = 0.5 MW (E) Nice IR footprint Probe#8 maps profile early. Next: 1.1 MA, no RF |
| Oct 7 2009 04:27:37:757PM | 1091007026 | Brian Labombard | Fixed strike point below the nose 26-LSN, 5.4 tesla, 1.1 MA, NL04~1.1, no probes scanning no RF Nice IR footprint. Nose has reflection,but it can be subtracted. Next: add 0.5 MW RF |
| Oct 7 2009 04:34:10:520PM | 1091007027 | Brian Labombard | 27-LSN, 5.4 tesla, 1.1 MA, NL04~1.1, no probes scanning Prf = 0.5 MW (E) Good IR footprint Next: strike point sweep, No RF |
| Oct 7 2009 04:56:48:193PM | 1091007028 | Brian Labombard | 28-LSN, 5.4 tesla, 1.1 MA, NL04~1.15, WASP(rho=0) @ 0.6, 0.95, 1.3 No RF power WASP needs to be deeper Tile TC signals hung up again on this no RF shot. - so much for the RF pickup theory Sweep needs to go further beyond the nose. Next: repeat, lower density to NL04~1, WASP deepe |
| Oct 7 2009 05:25:33:223PM | 1091007030 | Brian Labombard | 30-LSN, 5.4 tesla, 1.1 MA, NL04~1, WASP(rho=-1) @ 0.6, 0.95, 1.3 No RF power Nice mapping of heat flux profile across probe#8 WASP records pressure profile on first scan. |
| Physics Operator Comments | |||
| Oct 6 2009 05:09:14:710PM | Steve Wolfe | Set up for 1091007 Load from 1090923026, acknowledge the config warning Zero segs 3 and 4 Import seg1 from 1090904006, ack the config warning on this as well. Seg1: recalc wires 1,2,3,6,7; change rcur offset from 1000 to 2000; leave br_0 offset at .0005 Change ip waveform from -.54 to -.50MA; increase Ip gain to 1.8 at 0.8sec Seg2: recalc wires 1,2,3,4,5,6,7,8,11 Copy Ip trace from seg1 to seg2 reduce nl04 from 6.5 to 4e19 Before proceeding, do a build_all Import seg3 from seg2 so I've got a copy of the rxl ramp. Back in seg2 Set rxl to +.0017 (value at 0.7sec) from 0.4sec to 1.5sec Remove dpcs_ftae2 test_pro; add oh1_crossover routine. In seg1: Turn off pg3 Leave pg4 at 22msec Drop TF from -152.8kA to -150kA get rid of triangle wave on amhd_freq (wire 17) In seg2: reduce tf from -152.8 to -150kA Do another build_all Save as 1091007000 in alcdata-test:/cmod/trees/test/pcs and /dpcs and to /home/wolfe/pcs_scratch 1091007000 and also to | |
| Oct 7 2009 07:04:34:760AM | Steve Wolfe | Because of a TORVAC PLC fault, we got no ecdc or bake last night. May have some difficulty getting down to the low density for the first case today, but we'll see how it goes. I guess this will be a test of whether helium ecdc is worth anything. | |
| Oct 7 2009 07:26:05:150AM | Steve Wolfe | Continue setting up for 1091007 run on MP#570 Load from 1091007000 (saved last night); ack the config warning (I already did the calls, but the build_all doesn't update the config_id as the load does; probably should change that. Check the jumps at seg switch in rcur, zcur, ip: rcur goes from .648 to .6507, but there is a 2000A-m offset in seg1, and the current will be around 5e5A, so that's 4mm. I think that means the seg1 value is equivalent to .652; go ahead and move the seg2 initial value at 0.1sec to .652. zcur is -.0003 at 0.1 in seg1, -.015 in seg2, a big step. Change seg2 value to -.0005, drop to -.015 at .15sec ip was copied from 1 to 2, so it should match clearin starts at -.0297, not sure what the error will be, initial gain is P=4.9 Extend nl04 gain D=3 from 0.5 to 1.5sec That's enough for now, go ahead and load Load at 7-Oct-2009 07:25:48.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| Oct 7 2009 09:05:57:300AM | 1091007001 | Steve Wolfe | Shot#1: Program for 500kA,4e19,5.4T IGT=8e-8 (no ecdc last night). PG4=22msec Result: plasma full length, Ip still overshoots, doesn't get down to 0.5MA until 0.7. I can move the seg2 gain switch earlier. Gaps look ok to me, see what SL thinks. Next: Move ip gain at .356 from 2.6 to 6.0 |
| Oct 7 2009 09:19:32:803AM | 1091007002 | Steve Wolfe | Shot#2: Move ip gain at .356 from 2.6 to 6.0, before 0.1 in seg2 from 1.8 to 3.0. Increase nl04 demand at 0.1sec from 2.67 to 3.5e19 to try to alleviate the little dip in nl04 at .25 to .35sec, which is when it goes diverted. plasma full length, current and density a little better, could probably use more D gain on the nl04. NINJA comes in at 1.2sec Next: adjust D gain on NL04 |
| Oct 7 2009 09:36:25:660AM | 1091007003 | Steve Wolfe | Shot#3: NL04 D gain from 3 to 6. In seg2, rcur at 0.1sec from .65 to .648, trying to adjust jump at the seg switch. RF requested on this shot. Plasma full length. RF comes on at 0.5sec, gives a little bump on NL04, so I can't judge the effect of the D gain change very well. Rcur step is smaller, so that was the right direction, but probably the wrong place to put it. There is a significant thrash on zcur after .1, probably driven by ef2s and clearin, although it may be overshoot from zcur P gain; it damps out by .125sec. Current rise a little slower in startup, base pressure is up a little. No runaways. Next: No dpcs changes |
| Oct 7 2009 09:56:02:943AM | 1091007004 | Steve Wolfe | Shot#4: No dpcs changes fizzle? Got to 200kA and something came in? Notice that we aren't getting the ef3 voltage trace, but that's been true all day. Not the problem on this. Plasma looks like it's moving down and in, no obvious injection. looks more like a limiter interaction. Next: rcur offset from 2000 to 1000 |
| Oct 7 2009 10:06:32:863AM | 1091007005 | Steve Wolfe | Shot#5: rcur offset from 2000 to 1000 (instead of a gas tweak?) plasma full length, but big runaways early. Next: rcur offset from 1000 to 1500. |
| Oct 7 2009 10:30:05:287AM | 1091007006 | Steve Wolfe | Shot#6: rcur offset from 1000 to 1500. increase pg4 from 22 to 24msec reduce nl04 P gain from 9 to 7. JT is going to want a strike adjustment He wants it where it is at 1.4sec, earlier Try taking zxl form -.005 to .005 at .555sec Note that rxl is going from .0017 to .00017, should have been .0017 across, but must have had a typo. However, he likes it at the end, so leave it for now. plasma full length, no runaways. Now JT likes the strike between 1 and 1.1sec, wants it held there. RXL and ZXL look pretty constant in EFIT, so I need to move these. ZVSOUT is climbing the plate from -49.7 to -48.3 over 1 to 1.5sec |
| Oct 7 2009 10:46:59:613AM | 1091007007 | Steve Wolfe | Shot#7: ZXL at .55 from .005 to .01, 1.48 from .005 to .00 rxl at .5 from .0017 to .005. No startup changes plasma full length. JT says that was ok, have to see what it actually did. Got the strike on the plate a lot earlier, but still moving up. I could probably hold it a little better early. |
| Oct 7 2009 10:56:10:820AM | 1091007008 | Steve Wolfe | Shot#8: ZXL at .55 from .01 to .015, fix at .8sec No startup changes. RF request to 1MW. Shit shooter gate valve enabled, will pulse in rampdown. Short bright disruption, lots of runaways. something fell in at .032sec, got to 130kA. Next: raise pg4 from 24 to 26msec |
| Oct 7 2009 11:16:38:240AM | 1091007009 | Steve Wolfe | Shot#9: ZXL at .55 from .01 to .015, fix at .8sec pg4 from 24 to 26msec. I think it was just a flake, but give it a gas tweak anyway. Five minute delay for ef3U relay reset (bad resistance reading) It's after 11 and still working on A.1! plasma full length, still some runaways early. Late H-mode during Ninja puff after 1.4sec EFIT shows zvsout pretty flat from 0.4sec on. Something hits at 0.078sec that coincides with the runaway dump. Next: raise pg4 a little more. |
| Oct 7 2009 11:38:18:320AM | 1091007010 | Steve Wolfe | Shot#10:raise pg4 from 26 to 28msec RF request to 1.5MW plasma full length, hards at the 10^13 level H-mode at 1.3sec or so, got 1.5MW. I expect they'll be ready to move on now. Next: rcur offset back to 2000 |
| Oct 7 2009 11:49:30:270AM | 1091007011 | Steve Wolfe | Shot#11: rcur offset back to 2000 repeat because IR cam was saturated on 10. plasma full length, still runaways over 2e13. Next: strike point sweep at some power? Raise pg4, put in a little pg3 in seg1 for runaway suppression |
| Oct 7 2009 12:03:20:507PM | 1091007012 | Steve Wolfe | Shot#12: pg4 from 28 to 30, put in a little pg3 in seg1 for runaway suppression Copy rxl,zxl from seg3 (was 1090923026) for sweep around the nose (A.2) Back to 0.5MW rf request plasma fulll length runaways a little better, but still there. No Hmode, as expected. Note that the MFLUX bz0 signal is going positive again. Strike point sweep looks ok, I think we're ready for 800kA if the data are ok. |
| Oct 7 2009 12:26:52:723PM | 1091007012 | Steve Wolfe | Shot#13: Increase pg3 puff in seg1 Put oh crowbar times back to .12sec Ip gain off in seg1 Load Ip wire 16 in seg2 from 1090923026 Change nl04 in seg2 to 8e19 Load wire 5 and 6 (rxl,zxl) from 1091007010 for fixed strikepoint (except it won't be at this current) turn off oh1_crossover routine. This will be a NO-POWER shot-- too long a computer delay for cryo |
| Oct 7 2009 12:51:07:820PM | 1091007012 | Steve Wolfe | Shot#13 redux: Another try at B.1. Changes from #12 were: Increase pg3 puff in seg1 Put oh crowbar times back to .12sec Ip gain off in seg1 Load Ip wire 16 in seg2 from 1090923026 Change nl04 in seg2 to 8e19 Load wire 5 and 6 (rxl,zxl) from 1091007010 for fixed strikepoint (except it won't be at this current) turn off oh1_crossover routine. Result: Another data system hang. Looks like it did init dpcs according to the log file, and logbook shows green init, but no IGOR bit on state, Bill sees no actions on his actmon. Probably going to do another no-power. Or not, going to check . Tried a power shot and Nothing happened. dpcs logfile indicates it went from init to store without realtime??? we have data stored in shot#13 for dpcs, bus-rogs, magnetics, that is leftover from #12! |
| Oct 7 2009 01:07:18:240PM | 1091007015 | Steve Wolfe | Shot#15 (according to twf): Another try at B.1. Changes from #12 were: Increase pg3 puff in seg1 Put oh crowbar times back to .12sec Ip gain off in seg1 Load Ip wire 16 in seg2 from 1090923026 Change nl04 in seg2 to 8e19 Load wire 5 and 6 (rxl,zxl) from 1091007010 for fixed strikepoint (except it won't be at this current) turn off oh1_crossover routine. Result: Another NO POWER JT is going to lunch. |
| Oct 7 2009 01:24:24:913PM | 1091007016 | Steve Wolfe | Shot#16: Yet another try at B.1. Changes from #12 were: Increase pg3 puff in seg1 Put oh crowbar times back to .12sec Ip gain off in seg1 Load Ip wire 16 in seg2 from 1090923026 Change nl04 in seg2 to 8e19 Load wire 5 and 6 (rxl,zxl) from 1091007010 for fixed strikepoint (except it won't be at this current) turn off oh1_crossover routine. Result: dud No OH's or EF1's ! |
| Oct 7 2009 01:41:06:303PM | 1091007017 | Steve Wolfe | Shot#17: Yet another try at B.1. Changes from #12 were: Increase pg3 puff in seg1 Put oh crowbar times back to .12sec Ip gain off in seg1 Load Ip wire 16 in seg2 from 1090923026 Change nl04 in seg2 to 8e19 Load wire 5 and 6 (rxl,zxl) from 1091007010 for fixed strikepoint (except it won't be at this current) turn off oh1_crossover routine. Change from #16: toggle PLC enables on OH & EF1 supplies, Not clear if it missed camac or PLC enable, but supplies stayed in forced invert on 16. Result: plasma full length FINALLY! small amount of hards. density and current ok., strike moves up some after 1.2sec, need to see what JT wants |
| Oct 7 2009 01:55:49:630PM | 1091007018 | Steve Wolfe | Shot#18: move rxl in after 1.2sec from .00017 to -.001 at 1.5sec Strike really wasn't moving much, and this is a pretty small tweak. fizzle. looks like too much gas. Next: drop density to .65, per JT request and reduce pg4 from 30 to 27msec |
| Oct 7 2009 02:13:47:710PM | 1091007019 | Steve Wolfe | Shot#19: drop density to .65e20, per JT request, also recall nl04 predictor (set to 1.0 in custom) in case it has been using a bad calibration number; we were getting 7.5 instead of 8.0e19 reduce pg4 from 30 to 27msec relative to #17, move rxl in after 1.2sec from .00017 to -.001 at 1.5sec plasma full length, no runaways, nl04=6.4e19. startup ok, not real fast, could probably stand a little less pg4, and we're overshooting the density on the pg3 puff, so I'll back that one down. Next: reduce pg3 in seg1, rf request to 0.5MW. |
| Oct 7 2009 02:25:52:820PM | 1091007020 | Steve Wolfe | Shot#20: reduce pg3 in seg1,pg4 from 27 to 25msec rf request to 0.5MW. plasma full length, no runaways, late H-mode around 1.4sec Mflux bz0 is going positive again. Next: repeat with 1MW? |
| Oct 7 2009 02:39:55:663PM | 1091007021 | Steve Wolfe | Shot#21: repeat with 1MW, no dpcs changes Brian lost data on #20, couldn't recover plasma full length. H-mode at the end. Still no runaways, startup ok. Next: repeat with more rf I guess. |
| Oct 7 2009 02:55:01:833PM | 1091007022 | Steve Wolfe | Shot#22: repeat, no dpcs changes, ir was saturated on #21. plasma full length. Looks a lot like 21. Next: Now, 1.5MW |
| Oct 7 2009 03:09:04:863PM | 1091007023 | Steve Wolfe | Shot#23: repeat with 1.5MW, no dpcs changes plasma full length, 3 h-modes all through the rf pulse, last one looks eda-ish. Next: load the sweep, back off to 0.5MW |
| Oct 7 2009 03:43:36:380PM | 1091007024 | Steve Wolfe | Shot#24: load the sweep, back off to 0.5MW copy rxl,zxl from seg3 to get the sweep over the nose No startup changes. Delay for computer: trying to rescue some of Brian's data, crashed pcdaqeng1. plasma full length, no runaways, looks like an injection at crossover, near 0.4sec. Got the sweep. Next: Try fixing the strike above the nose, where it is ~1.3sec |
| Oct 7 2009 04:02:04:350PM | 1091007025 | Steve Wolfe | Shot#25: Try fixing the strike above the nose, where it is ~1.3sec Zxl at 0.55 up from -.005 to +.005 (and move the earlier point from -.003 to +.003 Rxl at 0.5 from -.01 to +.01, to .035 at .8sec, then flat. Try that, see what it does. Keeping 0.5MW plasma full length, didn't disrupt anyway. Looks like it did what I asked, moves up to above the nose and sits there from about 0.85sec on. Next: on to 1.1MA, 1.2e20 (C.1) |
| Oct 7 2009 04:28:46:147PM | 1091007027 | Steve Wolfe | Shot#27: Raise nl04 gain from P=7 to 9, drop to 8 after .3sec NL04 target to 1.2 at .45sec (from .55). No startup change, leave strike as is. RF to 0.5MW plasma full length, dithers till 1.3 then Hmode. Next: Do the sweep next, with zero rf |
| Oct 7 2009 04:45:40:303PM | 1091007028 | Steve Wolfe | Shot#28: Do the sweep: copy rxl,zxl from seg3 pg4 from 25 to 22msec, rcur offset from 2000 to 1500 (#27 looked like it was slowing down, staying inside) plasma to 1.5sec, disrupted at end of flattop. OH2U railed at 1.3sec Next: raise PLC limit on OH1,OH2U,OH2L to -30kA Drop pg4 |
| Oct 7 2009 04:57:49:427PM | 1091007029 | Steve Wolfe | Shot#29: Drop pg4 from 22 to 19msec Drop nl04 target from 1.2 to 1.0e20 Increase endpoint of rxl scan from .035 to .05 fizzle. Not surprising, but disappointing. Next: pg4 to 18msec and try again. |
| Oct 7 2009 05:16:44:287PM | 1091007030 | Steve Wolfe | Shot#30: Drop pg4 from 19 to 18msec Changes from #28: Drop nl04 target from 1.2 to 1.0e20 Increase endpoint of rxl scan from .035 to .05 plasma to 1.55sec, disrupts in rampdown. Strike scans onto the tile above the nose before it goes boom. Forgot to open Amanda's gate valve, but we'll live with it, FRCECE should be there. END OF RUN |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:58:49:573AM | Plasma | Ok | |
| 2 | 09:13:47:147AM | Plasma | Ok | |
| 3 | 09:27:47:193AM | Plasma | Ok | |
| 4 | 09:43:58:257AM | Plasma | Ok | |
| 5 | 10:01:48:537AM | Plasma | Ok | |
| 6 | 10:20:28:333AM | Plasma | Ok | |
| 7 | 10:35:09:647AM | Plasma | Ok | |
| 8 | 10:49:47:083AM | Plasma | Ok | |
| 9 | 11:08:46:430AM | Plasma | Ok | |
| 10 | 11:31:42:273AM | Plasma | Ok | |
| 11 | 11:45:20:820AM | Plasma | Ok | |
| 12 | 11:58:03:507AM | Plasma | Ok | |
| 15 | 01:00:12:053PM | Plasma | Bad | Shot cycle hung up |
| 16 | 01:21:43:960PM | Plasma | Bad | No OH's and EF1s |
| 17 | 01:34:33:210PM | Plasma | Ok | |
| 18 | 01:51:27:363PM | Plasma | Ok | |
| 19 | 02:07:11:490PM | Plasma | Ok | |
| 20 | 02:19:45:647PM | Plasma | Ok | |
| 21 | 02:36:27:897PM | Plasma | Ok | |
| 22 | 02:49:19:740PM | Plasma | Ok | |
| 23 | 03:02:21:867PM | Plasma | Ok | |
| 24 | 03:37:37:363PM | Plasma | Ok | |
| 25 | 03:53:54:773PM | Plasma | Ok | |
| 26 | 04:10:27:443PM | Plasma | Ok | |
| 27 | 04:24:45:553PM | Plasma | Ok | |
| 28 | 04:37:20:787PM | Plasma | Ok | |
| 29 | 04:53:37:397PM | Plasma | Ok | |
| 30 | 05:06:52:553PM | Plasma | Ok | |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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