| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Parkin,Sam Pierson,Ed Fitzgerald |
| Engineering Operator Run Comment |
| MP#570 - Boundary layer heat transport experiments in L-mode plasmas |
| Session Leader Plans |
| Entered: Sep 3 2009 12:16:17:357PM |
| Author: Brian Labombard |
| Run Plan for 1090904 MP#570 - Boundary layer heat transport experiments in L-mode plasmas Goal We will concentrate on 5.4 Tesla discharges, first finishing up the 0.54 MA density scan and then move on to 1.1 MA. The challenge for the 0.54 MA shots is going to be taming the OH1 cross-over glitch, which causes the inner gap to go to zero if left unchecked. Last time, Steve Wolfe came up with a patch - program a voltage step in OH1 at cross-over to minimize the blank period. It worked, but it requires manual 'guess and test' tuning for each shot. This time Steve is thinking about implementing some software for real-time control. Setup NINJA should be filled to 8 PSI D2. Reload shot#1090825029 and dial up NL04 ~ 0.68 Be aware that this shot had the OH1 voltage step program around cross-over time. Play with cross-over a bit and then push on. A. LSN, 5.4 tesla, 0.54 MA NL04~ 0.68, 0.81, 0.95, 1.1e20 Two shots at each density, probes scanning to resolve shear layer. B. LSN, 5.4 tesla, 1.1 MA NL04~ 0.6, 0.9, 1.2, 1.5, 1.8, 2.1, 2.4e20 Two shots at each density, probes scanning to resolve shear layer. If things go well, move on to: C. LSN, 4.0 tesla, 0.4 MA NL04~ 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8e20 Two shots at each density, probes scanning to resolve shear layer. |
| Physics Operators Plans |
| Entered: Sep 3 2009 02:35:27:260PM |
| Author: Steve Wolfe |
| Physics Operator Plan and Engineering setup for Friday, Sep 4, 2009
MP#570 Boundary layer heat transport experiments in L-mode plasmas SL: LaBombard PO: wolfe ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1090825029 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 8 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 ICRF(yes/no): NO LH(yes/no): no DNB(yes/no): NO Cryopump (yes/no): I wish, but Brian says NO 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 *************************************************** Physop plan: Following SL plan, load from 1090825029, change nl04 to 0.68e20 remove oh1 voltage steps around crossover turn on TEST_PROS oh1_crossover procedure, set switch_times to cover likely crossover interval. Probably adjust the early current programming, and/or move seg2 earlier to get rid of the overshoot Verify that it's working, maybe tune it up if indicated, and proceed to follow the SL plan A. LSN, 5.4 tesla, 0.54 MA NL04~ 0.68, 0.81, 0.95, 1.1e20 Two shots at each density, probes scanning to resolve shear layer. B. LSN, 5.4 tesla, 1.1 MA (probably need to undo whatever I did for low Ip) NL04~ 0.6, 0.9, 1.2, 1.5, 1.8, 2.1, 2.4e20 Two shots at each density, probes scanning to resolve shear layer. If things go well, move on to: C. LSN, 4.0 tesla, 0.4 MA (probably use low-field startup, following Ian's prescription dEF1/dTF = 2.46 A/kA dEF4/dTF = 0.59 A/kA although I'm not so sure of the EF4. NL04~ 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8e20 Two shots at each density, probes scanning to resolve shear layer. |
| Session Leader Summaries |
| Entered: Sep 7 2009 10:53:29:657PM |
| Author: Brian Labombard |
| MP#570 "Boundary layer heat transport experiments in L-mode plasmas"
This was another productive run for the MP, largely because of Steve Wolfe's excellent physoping. We finished up the 0.54 MA, 5.4 tesla density scan (the last part of "day 1" on the master spreadsheet) and also completed the density scan at 1.1 MA (first part of "day 2" on the spreadsheet). Prior to the run, Steve Wolfe cooked up a real-time control algorithm to mitigate the OH1 cross-over glitch that presented a problem for the 0.54 MA discharges on the last outing. If left unchecked, the ~0.1 s cross-over (i.e. zero current) "dead spot" causes the inner gap to go to zero momentarily - not good for the inner-wall scanning probe and the desire to place the SOL heat onto the divertor target. Steve's fixed worked very well, keeping the plasma away from the inner wall through cross-over with acceptable wobbles in the inner gap. Shot#1 demonstrated this control and we keep it engaged for the 0.54 MA shots. After a few shots to optimize probe targeting and to clean off the boron layer (the scanning probes had been idle since the last boronization) we continued the density scan begun previously, NL04 ~ 0.66 to 1.2e20 (shots 4-10). Because of the low level of ohmic input power in these 0.54 MA plasmas, the power flow to the divertor was not very dramatic. The IR camera saw more IR plasma light than black-body surface emission on most of these shots. Surface thermocouple signals were also too low to be useful. Yet, the target Langmuir probes recorded very clean profiles of density and temperature as the strike point marched up the outer divertor, so we pushed on with the idea of "calibrating" these data in other discharges to extract the divertor heat flux footprint. On shots 6 and 7 (NL04 ~ 0.8), the outer divertor detached, with the power flow on the outer divertor being very low. Shots 8 and 9 were an attempt of NL04 ~ 0.9. These plasmas generated a MARFE in the upper chamber and became poloidally-detached, marking the end of this density scan. The remainder of the run focused on completing a density scan for 1.1 MA, 5.4 tesla conditions. This range of current is always a challenge for scanning probes. The edge gradients are very steep, forming a heat flux "wall" near the separatrix that the scanning probes must respect, or pay the consequences. We proceeded cautiously. At the low density point (NL04 ~ 0.65), the plasma tended to transition into ohmic H-modes after ~1.1 second. Fortunately, this happened after the strikepoint completed its sweep up the divertor plate, so we got some clean L-mode footprints. Sure enough, the IR data and surface TC signals were strong and the footprint looked quite narrow, producing a clean stripe on the ramped tiles in the IR camera view. The H-mode transition was a bonus for the turbulence-imaging diagnostics, which were gas-puffing at that time. Jim Terry reported some interesting activity (ELMs?) on the inner GPI system. However, as we pushed up the density to NL04 ~ 1.2, the H-modes became a problem. They morphed into many L-H-L-H transitions linked together for most of the flat-top. What to make of this heat-flux footprint? Were we seeing an H-mode footprint or an L-mode footprint - or a J-mode footprint (halfway between)? Noting the ambiguity, we did not dwell here and pushed on. At NL04 ~ 1.5 the H-modes went away. It was very difficult to hit the separatrix with the scanning probes and to not overheat the probes under these conditions. Electrodes on both the ASP and FSP were drawing 2 amps - the power supply current limit - and yet they only just touched the separatrix (~60 eV location) on one out of three scans. Still, we pushed on, attempted some higher density shots. These resulted in density ramps, NL04 ~ 1.6 to 1.9e20 and even more difficulties to target the probes. We took some profile data anyway. Finally, our intention was to redo a shot with NL04 ~ 1.5 to get the scanning probes a bit deeper (shot#30). No go - early disruption. Examining the profile data for the 1.1 MA portion of the run, it appears that we captured some high-quality data. In the high-density discharges, where the scanning probes could not penetrate much beyond the separatrix, the edge Thomson density and temperature profiles look very clean and appear to overlay with the probe data. This bodes well for future runs for this MP, where ICRF power will be applied and we will rely more exclusively on the Thomson diagnostic to record the "upstream" heatflux channel widths. Shot Log: 1-LSN,5.4T,0.56MA,NL04~0.66, no probes scanning. 2-LSN,5.4T,0.56MA,NL04~0.7, ASP(5),FSP(-5),WASP(rho=0) at 0.65, 1.0, 1.3s cross-over gap ok probes have boron layer 3-LSN,5.4T,0.56MA,NL04~0.67, ASP(+8),FSP(-3),WASP(rho=-2) at 0.65, 1.0, 1.3s ASP cleans up on first scan. 4-LSN,5.4T,0.56MA,NL04~0.67, ASP(+8),FSP(0),WASP(rho=-2) at 0.6, 1.0, 1.3s WASP deep on first scan, too close to cross-over 5-LSN,5.4T,0.56MA,NL04~0.7, ASP(+8),FSP(+2),WASP(rho=-2) at 0.65, 1.0, 1.3s 6-LSN,5.4T,0.56MA,NL04~0.81, ASP(+8),FSP(+0),WASP(rho=-2) at 0.65, 1.0, 1.3s 7-LSN,5.4T,0.56MA,NL04~0.81, ASP(+9),FSP(+2),WASP(manual 14.6, 17, 17V) at 0.65, 1.0, 1.3s outer divertor is detached. 8-LSN,5.4T,0.56MA,NL04~1.2 - 1.0, ASP(+10),FSP(+3),WASP(manual 14.6, 17, 17V) at 0.65, 1.0, 1.3s MARFE in upper divertor, edge very cold, divertor detached, poloidally detached. 10-LSN,5.4T,0.56MA,NL04~1.2 - 1.0, ASP(+10),FSP(+3),WASP(manual 14.6, 17, 17V) at 0.65, 1.0, 1.3s Essentially a repeat of shot 9. Next: go to 1.1 MA 11-LSN,5.4T,1.1MA,NL04~.73, No probes scanning Late H-mode 12-LSN,5.4T,1.1MA,NL04~.67, ASP(+4),FSP(-11),WASP(rho=-2) at 0.75, 1.05, 1.3s Late H-mode 13-LSN,5.4T,1.1MA,NL04~?, ASP(+4),FSP(-11),WASP(rho=-2) at 0.75, 1.0, 1.25s problem with NL04 H-mode at 1.3 s 14- no power shot 15- no power shot 16-LSN,5.4T,1.1MA,NL04~.64, ASP(+5),FSP(-9.5),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.37s ASP not deep enough Surftc#5 looks great. 17-LSN,5.4T,1.1MA,NL04~.7, ASP(+6.5),FSP(-9.5),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.37s Excellent data on scanning probes 18-LSN,5.4T,1.1MA,NL04~1.0, ASP(+6),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.15s 19-LSN,5.4T,1.1MA,NL04~1.0, ASP(+6),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.13s ASP not deep enough Nice data on WASP - see strong shear layer in H-mode 20-LSN,5.4T,1.1MA,NL04~1.0, ASP(+7),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.15s Scanning probe data ok 21-LSN,5.4T,1.1MA,NL04~1.2, ASP(+7),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s many short-lived H-modes ASP too deep on first scan Turn argon puff on next shot 22 - fizzle, 23-LSN,5.4T,1.1MA,NL04~1.2, ASP(+6),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s argon puff many H-modes 24-LSN,5.4T,1.1MA,NL04~1.5, ASP(+5),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s argon puff no H-modes 25-LSN,5.4T,1.1MA,NL04~1.5, ASP(+6),FSP(-9),WASP(rho=-2) at 0.75, 1.0, 1.25s argon puff no H-modes 26-fizzle 27-LSN,5.4T,1.1MA,NL04~1.6-1.9, ASP(+6),FSP(-9),WASP(rho=-2) at 0.75, 1.0, 1.25s Probes are as deep as they can go. ASP, FSP drawing 2 amps. This will be the highest density in the scan. 28-fizzle 29-LSN,5.4T,1.1MA,NL04~1.5-1.9, ASP(+6),FSP(-9),WASP(rho=-2) at 0.75, 1.0, 1.25s ASP, FSP could be deeper. 30-early disruption |
| Physics Operator Summaries |
| Entered: Sep 4 2009 05:56:57:577PM |
| Author: Steve Wolfe |
Physics operator summary for Friday, Sep 4, 2009
MP#570 Heat flux footprint
SL: LaBombard
PO: wolfe
EO: Parkin, Pierson, Fitzgerald
A moderately successful run today. We finished the low current (.54MA) density scan,
without the highest density points because the heatflux in the divertor was
already too low to detect. The high current scan (1.1MA) got through the first
five density points (0.6, 0.9, 1.2, 1.5, 1.8e20), with the highest densities
leading to disruptions near the end of flattop, apparently because of power
supply railing. An attempt on the last shot (#30) to get a better scan at
1.5e20 resulted in an early disruption, apparently from an injection. Startup
was less robust than in previous days, but not bad.
The new dpcs oh1_crossover routine was successful in ameliorating the glitch
in the gaps around crossover. I used the default setting of 250V for the
forcing voltage demand to accelerate the crossover, resulting in about 70msec
of zero time. Could have gotten it shorter, but this was sufficient for
today's purposes. I used this routine for the low current cases (#1-10) and
turned it off for the 1.1MA cases, since these go through at earlier time,
around 0.3 to 0.4sec, during current rise, and at higher voltage demand
anyway.
For the low current (0.54MA) I also used some Ip feedback in segment
1, and programmed lower than normal current at 0.1sec. This reduced the overshoot
somewhat relative to the original target shot from 1090825, but I didn't add
enougn gain (or move the crowbar) to restrain it completely. Again, this
programming and early feedback was turned off for the 1.1MA shots (11-30).
The 1.1MA scan went fairly slowly, as the SL had to be careful about probe
targeting into the high power discharges. The lower density points had ohmic
h-modes in the later part of the flattop, which were not particularly
desired. At 1.2e20 the H-modes were short, repetitive, and plentiful, which
made life very tough for the SL. We tried turning on some argon puff to
suppress these marginal h-modes, but this helped only a little. Finally we
just moved on to the higher density, which pushed the plasma above threshold.
For the high density points we had to increase the PLC limit on the OH
currents, first to 30 and finally to 35kA; the EF1U was railing at +5kA, which
is already at the administrative limit, so we had to live with the loss of
upper xpoint control at the end of these shots. We never did get rid of the
disruption at EOF of the 1.8e20 shots.
The magnetics problems noted at the end of yesterday's run were fixed by Willy
and Bob before the start of today's run, and did not recur. BP04_BC showed up
with small baseline offsets on a couple of shots, and probably should be
zapped when convenient.
Shots #3 and 4 had poor gap and position control because of a problem with the
oh1 power supply. The internal supply voltage reference
(engineering::top.power_systems.oh1:volt) was reading lower, by about a
factor of two, than the bus voltage. This happened also a couple of weeks
ago. Dave Gwinn "fixed" the problem by re-seating the fibers on a board in the
supply control cabinet, and also pulling and replacing some other
connectors. This seems to be a recurring problem and should be investigated
further on maintenance day, although it may be hard to find the problem if it
isn't there anymore. Dave thinks the fault is in the optical link. The
symptoms of this fault, when it occurs, are rather subtle if you aren't
looking at smoothed waveforms of the supply and bus voltages. As far as DPCS
is concerned, it manifests as poor control (uncorrected errors as seen on
phys_aout scope) in RCUR and CLEARIN, and perhaps some others, while the dpcs
demand and supply voltages seem to track (compare_volts_dpcs_new scope).
We also lost about an hour between shots#13 and 16 to a data system problem
(delay storing data from 13, followed by two no power shots because of failure
in INIT).
There was one short runaway "super-fizzle" discharge (#9), which made
it to 150kA, and one pre-flattop disruption (#30),
both probably due to flakes or injections at inopportune
times. Otherwise all plasmas lasted until at least 1.4sec, and most made it
through rampdown.
Scorecard:
No Power 2
Duds 0
Fizzles 3
Plasmas 25 (two < .5 sec)
======== ===
Shots 30
|
| Session Leader Comments | |||
| Sep 4 2009 09:26:12:697AM | 1090904001 | Brian Labombard | 1-LSN,5.4T,0.56MA,NL04~0.66, no probes scanning. left gap at cross-over is well behaved. |
| Sep 4 2009 09:40:59:717AM | 1090904002 | Brian Labombard | 2-LSN,5.4T,0.56MA,NL04~0.7, ASP(5),FSP(-5),WASP(rho=0) at 0.65, 1.0, 1.3s cross-over gap ok probes have boron layer |
| Sep 4 2009 10:09:20:913AM | 1090904003 | Brian Labombard | 3-LSN,5.4T,0.56MA,NL04~0.67, ASP(+8),FSP(-3),WASP(rho=-2) at 0.65, 1.0, 1.3s ASP cleans up on first scan. |
| Sep 4 2009 10:27:53:813AM | 1090904004 | Brian Labombard | 4-LSN,5.4T,0.56MA,NL04~0.67, ASP(+8),FSP(0),WASP(rho=-2) at 0.6, 1.0, 1.3s WASP deep on first scan, too close to cross-over |
| Sep 4 2009 10:50:05:133AM | 1090904005 | Brian Labombard | 5-LSN,5.4T,0.56MA,NL04~0.7, ASP(+8),FSP(+2),WASP(rho=-2) at 0.65, 1.0, 1.3s |
| Sep 4 2009 10:50:59:883AM | 1090904006 | Brian Labombard | 6-LSN,5.4T,0.56MA,NL04~0.81, ASP(+8),FSP(+0),WASP(rho=-2) at 0.65, 1.0, 1.3s WASP, FSP, ASP could be deeper |
| Sep 4 2009 11:19:07:817AM | 1090904007 | Brian Labombard | 7-LSN,5.4T,0.56MA,NL04~0.81, ASP(+9),FSP(+2),WASP(manual 14.6, 17, 17V) at 0.65, 1.0, 1.3s outer divertor is detached. |
| Sep 4 2009 11:19:36:443AM | 1090904008 | Brian Labombard | 8-LSN,5.4T,0.56MA,NL04~ 1.2 - 1.0, ASP(+10),FSP(+3),WASP(manual 14.6, 17, 17V) at 0.65, 1.0, 1.3s MARFE in upper divertor, edge very cold, divertor detached, poloidally detached. |
| Sep 4 2009 11:38:06:183AM | 1090904010 | Brian Labombard | 10-LSN,5.4T,0.56MA,NL04~1.2 - 1.0, ASP(+10),FSP(+3),WASP(manual 14.6, 17, 17V) at 0.65, 1.0, 1.3s Essentially a repeat of shot 9. Next: go to 1.1 MA |
| Sep 4 2009 12:27:19:623PM | 1090904011 | Brian Labombard | 11-LSN,5.4T,1.1MA,NL04~.73, No probes scanning H-mode near end of shot |
| Sep 4 2009 12:27:24:373PM | 1090904012 | Brian Labombard | 12-LSN,5.4T,1.1MA,NL04~.67, ASP(+2),FSP(-14),WASP(rho=-2) at 0.75, 1.05, 1.3s H-mode at 1.5s |
| Sep 4 2009 01:16:14:533PM | 1090904013 | Brian Labombard | 13-LSN,5.4T,1.1MA,NL04~?, ASP(+4),FSP(-11),WASP(rho=-2) at 0.75, 1.0, 1.25s problem with NL04 H-mode at 1.3 s |
| Sep 4 2009 01:51:44:907PM | 1090904016 | Brian Labombard | 16-LSN,5.4T,1.1MA,NL04~.64, ASP(+5),FSP(-9.5),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.37s ASP not deep enough Surftc#5 looks great. |
| Sep 4 2009 02:04:51:287PM | 1090904017 | Brian Labombard | 17-LSN,5.4T,1.1MA,NL04~.7, ASP(+6.5),FSP(-9.5),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.37s Excellent data on scanning probe |
| Sep 4 2009 02:27:33:327PM | 1090904018 | Brian Labombard | 18-LSN,5.4T,1.1MA,NL04~1.0, ASP(+6),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.15s |
| Sep 4 2009 02:33:43:220PM | 1090904019 | Brian Labombard | 19-LSN,5.4T,1.1MA,NL04~1.0, ASP(+6),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.13s ASP not deep enough Nice data on WASP - see strong shear layer in H-mode |
| Sep 4 2009 02:46:14:350PM | 1090904020 | Brian Labombard | 20-LSN,5.4T,1.1MA,NL04~1.0, ASP(+7),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s H-mode at 1.15s Scanning probe data ok |
| Sep 4 2009 03:29:13:803PM | 1090904021 | Brian Labombard | 21-LSN,5.4T,1.1MA,NL04~1.2, ASP(+7),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s many short-lived H-modes ASP too deep on first scan |
| Sep 4 2009 03:29:29:413PM | 1090904023 | Brian Labombard | 23-LSN,5.4T,1.1MA,NL04~1.2, ASP(+6),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s argon puff many H-modes |
| Sep 4 2009 03:59:12:970PM | 1090904024 | Brian Labombard | 24-LSN,5.4T,1.1MA,NL04~1.5, ASP(+5),FSP(-10),WASP(rho=-2) at 0.75, 1.0, 1.25s argon puff no H-modes |
| Sep 4 2009 03:59:30:830PM | 1090904025 | Brian Labombard | 25-LSN,5.4T,1.1MA,NL04~1.5, ASP(+6),FSP(-9),WASP(rho=-2) at 0.75, 1.0, 1.25s argon puff no H-modes |
| Sep 4 2009 04:32:39:953PM | 1090904027 | Brian Labombard | 27-LSN,5.4T,1.1MA,NL04~1.6-1.9, ASP(+6),FSP(-9),WASP(rho=-2) at 0.75, 1.0, 1.25s Probes are as deep as they can go. ASP, FSP drawing 2 amps, just making sep. This will be the highest density in the scan |
| Sep 4 2009 05:08:45:233PM | 1090904029 | Brian Labombard | 29-LSN,5.4T,1.1MA,NL04~1.5-1.9, ASP(+6),FSP(-9),WASP(rho=-2) at 0.75, 1.0, 1.25s ASP, FSP could be deeper |
| Physics Operator Comments | |||
| Sep 4 2009 08:00:40:237AM | 1090904001 | Steve Wolfe | Setting up for MP#570, second day. load from 1090825029 (5.4T, 0.54MA, 6e19.RXL sweep) change seg2 title to indicate 0.54MA raise nl04 from 5.4 to 6.8e19 modify Ip program to max current 0.54, eliminating overshoot Remove 350V box on OH1_VOLT around 0.72sec Copy Ip trace to seg1 and turn on Ip gain, P=1.8@.06sec, Ip Controller @-3 to xcontihh, tauopt=0.3; set time const=1. Change seg1 title to mention Ip control Leave pg4 25msec Rcur=1000 (leave alone) BR_0=.0005 IC_EF4=-1300 Remove TEST_PROS dpcs_ftae2 (not used) Add TEST_PROS oh1_crossover (use default settings, no setup entries) Try to load, get warning on p16 seg1 (Ip) "bit controller has illegal entries -- max abs val must be <2.5. Adjust the controller (use set_at_limits) or make predictor factor more sensitive." Note that time constant on Ip in seg2 is 0.6 instead of 1.0, Change to the same in seg1 Ip controller. Do a build_all to test Load at 4-Sep-2009 07:46:42.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done ---------------------- On pcdaqdpcs3 restart the dpcs server wolfe@pcdaqdpcs3 /usr/local/cmod/codes/dpcs$ ./dpcs_restart Back on cmodwsd50 check the pcdaqdpcs3-dpcs.log file Take test_init_dpcs2,1090904101 Log file looks ok. I see 3 heapvars (two 0b, one 1b) listed at the end, probably should have included a cleanup procedure, but these should get scavenged. Since the f.d. is on, I shouldn't see anything on the outputs, and I don't. I think I'm ready to go. The two magnetics sensors BP16_JK and F15 still need zapping. Bob hasn't responded, so Willy will do this before lockup. |
| Sep 4 2009 08:36:44:703AM | 1090904001 | Steve Wolfe | Willy reports that F15 went from 7 Ohm to 4.1, but BP16_JK is open. It was giving something on shots 32 and 33, so this seems unlikely. I could replace with a different one, probably the _BC, but most of these have shown bad lately. |
| Sep 4 2009 08:54:06:920AM | 1090904001 | Steve Wolfe | The connector used for zapping had a broken wire at the terminal strip, resulting in the erroneous open circ reading for bp16_jk; Bob fixed it and they are zapping the coil (R~10 Ohms) now. |
| Sep 4 2009 09:08:20:093AM | 1090904001 | Steve Wolfe | Shot#1: Try for 0.54MA, 6.8e19, with crossover acceleration, re-programmed early current, and hopefully fixed BP16_ plasma full length Still overshooting on Ip, doesn't quite get to density. The crossover accel seems to have worked, negligible (to Brian!) glitch on left gap at crossover, which lasts about 70msec. If he's happy, I'll leave it this way, could shorten some more, but why bother. Next: Try to improve density control, add D gain straight across |
| Sep 4 2009 09:24:51:850AM | 1090904002 | Steve Wolfe | Shot#2: Extend D=3 from 0.5sec to 1.78sec; also extend program to 1.4s Leave startup, gaps, current rise, crossover alone. pl plasma full length, probe pokes. Next: increase inner gap by 2mm |
| Sep 4 2009 09:43:03:077AM | 1090904003 | Steve Wolfe | Shot#3: CLEARIN from -.004 to -.002, RCUR from .656 to .657@0.72sec, .657->.658 at 1.5sec. Increase nl04 D gain from 3 to 5 to reduce oscillation on gas demand. Note that we got baseline offset 1.6e-2 on bp04_bc (control) on shot2; keep an eye on that one. plasma full length, early marfe maybe worse.Couple of injections. hesitation in startup this time, pressure is higher. Inner gap looks less well controlled, too big early, dropping after 1sec. |
| Sep 4 2009 10:18:36:497AM | 1090904004 | Steve Wolfe | Shot#4: Move integral gain step from 2 to 4 back from .55sec to .4sec. Hopefully, that will control the gaps better, but I don't understand the big drift in outer gap either, RCUR shows drifting error as well. Reduce pg4 in seg 1 from 25 to 22msec, reduce pg3 plasma full length Still not controlling the gaps as well as earlier. It looks to me like the OH1 bus voltage and supply voltage are different by a lot. This was not the case on shot 1 or 2, showed up on shot#3. Dave Gwinn is going to take a look, reseat fibers on a board. |
| Sep 4 2009 10:31:02:157AM | 1090904005 | Steve Wolfe | Shot#5: Repeat with no dpcs changes, even to startup, since the supply effect could also be causing the hesitation. plasma full length, Brian poked despite my warning. Supply voltage looks ok again. Dave thinks it's the optical link. Gaps look flatter and better controlled. Next: Increase gap again, flatten density at 0.81 if possible. |
| Sep 4 2009 10:43:30:100AM | 1090904006 | Steve Wolfe | Shot#6: Nl04 from .68 to .81e20, D gain from 5 to 8. clearin from -.002 to 0. rcur from .657 to .658, and .658 to .659 at 1.5sec plasma full length, marfing at the end. inner gap looks like 10:11mm, little glitch at crossover. Next: Brian says leave it alone. |
| Sep 4 2009 10:57:19:560AM | 1090904007 | Steve Wolfe | Shot#7: No dpcs changes. Probably should undo the pg4 reduction made at shot#4, but there are no runaways yet, and we're going up in density, so leave it alone. plasma full length, looks the same as the last time. Next: Go on to next density? |
| Sep 4 2009 11:17:28:427AM | 1090904008 | Steve Wolfe | Shot#8: NL04 from 8.1 to 9.5e19. Will probably skip the highest one, since the heat flux at the plate is already invisible at 8.1e19 plasma with a marfe, .65 to 1.1sec, maybe that was at crossover? No, marfe comes first. Next: Add some feedforward gas between .1 and .3, ask for more nl04 early. |
| Sep 4 2009 11:30:48:977AM | 1090904009 | Steve Wolfe | Shot#9: Add some feedforward gas between .1 and .3, ask for more nl04 early. short runaway super-fizzle, got to 150kA. looks like a flake at .05sec Next: raise pg4 2msec |
| Sep 4 2009 11:48:13:220AM | 1090904010 | Steve Wolfe | Shot#10:raise pg4 from 23 to 25msec plasma full length, upper marfe after .65 sec lasts rest of shot. Got bp04_bc offset again, 1.8e-2. Next: Go to part B: 1.1MA, 0.6e20 |
| Sep 4 2009 11:53:43:563AM | 1090904011 | Steve Wolfe | Shot#11:Go to part B: 1.1MA, 0.6e20 Turn off Ip control in seg1. Draw 1.1MA, BOF@.55sec, 640kA@0.1sec Turn off oh1_crossover routine, expect it will cross fast anyway nl04 from .95 to .6e20; remove pg3 in seg2. Change seg1 and seg2 titles Remember to load it. Plasma full length, 1.1MA, late H-mode. nl04 was closer to .7 than .6, probably come down next shot. Gaps look steady to me, crossover is around .35, as expected. Next: Maybe tweak the strike sweep? |
| Sep 4 2009 12:12:03:963PM | 1090904012 | Steve Wolfe | Shot#12: Brian's happy, no dpcs changes for this shot. plasma full length, probe pokes and survives, h-mode at EOF looks repeatable to me. Next: repeat. |
| Sep 4 2009 12:44:40:770PM | 1090904013 | Steve Wolfe | Shot#13: repeat, no DPCS changes plasma full length, late h-mode. Event server may have died, not getting updates Data coming through after Josh got it going again, events ok, maybe the dispatcher? NL04 signal looks very noisy and low, possibly an analysis problem? EFIT is there mow, looks ok. Next: repeat |
| Sep 4 2009 12:59:39:073PM | 1090904014 | Steve Wolfe | Shot#14: repeat, no DPCS changes Had to bypass IGOR, josh out of communication again. stuck in INIT, Josh is back and looking at it. No power shot. |
| Sep 4 2009 01:15:42:050PM | 1090904015 | Steve Wolfe | Shot#15: repeat, no DPCS changes Still having problems in INIT. Actmon thinks it's done, but still yellow on STATE Do another NO POWER |
| Sep 4 2009 01:40:17:650PM | 1090904016 | Steve Wolfe | Shot#16: repeat,still no DPCS changes Still trying to complete B.1:1.1MA,6e19 plasma full length, same as before; h-mode at EOF Looks good to me. Next: On to 9e19? |
| Sep 4 2009 01:52:11:687PM | 1090904017 | Steve Wolfe | Shot#17: Repeat 6e19 again, need to get probe further in. plasma full length, h-mode at EOF, same as before. Next: Now go to next point in nl04 scan? |
| Sep 4 2009 02:09:11:523PM | 1090904018 | Steve Wolfe | Shot#18: nl04 from 6 to 9e19 plasma full length, late marfe, h-mode at 1.15 to 1.6sec nl04~1e20, drop the request to 8 next time. |
| Sep 4 2009 02:20:07:603PM | 1090904019 | Steve Wolfe | Shot#19: nl04 from 9 to 8.5e19, there seems to be a small discrepancy between the feedback calibration and the TCI NL04 value. plasma, h-mode, density down a little; very similar to 18. Next: On to 1.2e20 |
| Sep 4 2009 02:28:59:390PM | 1090904019 | Steve Wolfe | Shot#19: nl04 from 9 to 8.5e19, there seems to be a small discrepancy between the feedback calibration and the TCI NL04 value. plasma, h-mode, density down a little; very similar to 18. Next: On to 1.2e20 |
| Sep 4 2009 02:38:18:207PM | 1090904020 | Steve Wolfe | Shot#20: Nl04 back to 8.5e19, Brian needs another poke. Plasma, h-mode, ... Next: NOW, Brian says he really wants 1.2e20 |
| Sep 4 2009 02:57:08:213PM | 1090904021 | Steve Wolfe | Shot#21: Nl04 from 8.5e19 to 1.2e20 plasma disrupts at 1.52sec, lots of short H-modes. Railing OH1 at the end, also EF1U. Maybe also OH2L Need to raise the OH PLC limits, can't do anything about EF1U. |
| Sep 4 2009 03:04:30:560PM | 1090904022 | Steve Wolfe | Shot#22: raise the OH PLC limits to 30Ka, Reduce end of density demand, go negative at 1.3sec. Enable the argon puff, trying to get rid of the multiple H-modes! fizzle, should have dropped the fill Next: drop pg4 to 22msec |
| Sep 4 2009 03:24:29:067PM | 1090904023 | Steve Wolfe | Shot#23:drop pg4 to 22msec Argon still enabled, nl04=1.2e20 programmed plasma to 1.8sec, still has some (lots of) little short H-modes. Argon didn't kill them off. Next: ? |
| Sep 4 2009 03:35:48:103PM | 1090904024 | Steve Wolfe | Shot#24: Nl04 from 1.2 to 1.5e20 plasma to 1.8sec, no h-modes. Gets to density target at .75sec. Dalpha spike at crossover, not big. EF1U is railed from 1.3sec on |
| Sep 4 2009 03:50:16:717PM | 1090904025 | Steve Wolfe | Shot#25: repeat plasma to 1.8sec, very similar. |
| Sep 4 2009 04:03:54:880PM | 1090904026 | Steve Wolfe | Shot#26: Nl04 from 1.5 to 1.8e20, add a 30V pg3 puff from 0.1 to 0.4sec to help it along Could probably stand to reduce pg4 another msec or two, but leave it this time. Like I said, should have dropped the pg4: FIZZLE |
| Sep 4 2009 04:22:42:137PM | 1090904027 | Steve Wolfe | Shot#27: pg4 from 22msec to 19msec changes made for #26: Nl04 from 1.5 to 1.8e20, add a 30V pg3 puff from 0.1 to 0.4sec to help it along plasma to 1.45sec, EF1U is railed from 1.22sec Looks like OH1 and OH2U are railing again, although they shouldn't be. OH1 is at 27kA, limit was supposed to be 30. OH2 may just be out of voltage. I can try raising the limits, but I don't think it will help. Next: raise OH plc limits to 35kA, drop nl04 after 1.2sec, drop pg4 |
| Sep 4 2009 04:31:30:310PM | 1090904028 | Steve Wolfe | Shot#28: pg4 from 19 to 17msec; nl04 negative after 1.2sec Increase pg3 in seg2 from 30 to 50V between .1 and .4sec. Raise PLC limits on OH's from 30 to 35kA (the admin limit) fizzle. hits something at 10msec, or something falls in. Next: down to 16msec |
| Sep 4 2009 04:41:30:003PM | 1090904028 | Steve Wolfe | Shot#29: pg4 from 17 to 16msec Changes made for 28: nl04 negative after 1.2sec Increase pg3 in seg2 from 30 to 50V between .1 and .4sec. Raise PLC limits on OH's from 30 to 35kA (the admin limit) We never got the "big board" readouts and shot number change on #28? Not sure if there is a datasystem problem or not. |
| Sep 4 2009 04:53:55:790PM | 1090904029 | Steve Wolfe | Shot#29: pg4 from 17 to 16msec Changes made for 28: nl04 negative after 1.2sec Increase pg3 in seg2 from 30 to 50V between .1 and .4sec. Raise PLC limits on OH's from 30 to 35kA (the admin limit) We never got the "big board" readouts and shot number change on #28? Not sure if there is a datasystem problem or not. cmodws35 had crashed, rebooting as we take the shot. Plasma to 1.5sec, just like #27. Not sure why it's disrupting, except that it's getting cold and oh2u may be out of voltage and EF1U is on the rail. It ends up going vertically because EFC P gain is causing it to floor, I think; the OH's and EF2's aren't hacking it. Next: Go back to 1.5e20 as on #25 |
| Sep 4 2009 05:10:14:577PM | 1090904030 | Steve Wolfe | Shot#30: Import seg2 from #25 (1.5e20) PG4 from 16 to 15msec Short disruption at 0.4sec. Looks like an injection around .33sec just as it went into crossover (NOTE: I was not running the dpcs crossover routine!) OH1 crowbarred after the disruption. END OF RUN |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:01:25:670AM | Plasma | Ok | |
| 2 | 09:21:08:443AM | Plasma | Ok | |
| 3 | 09:37:09:170AM | Plasma | Ok | |
| 4 | 10:00:26:287AM | Plasma | Ok | |
| 5 | 10:23:27:810AM | Plasma | Ok | |
| 6 | 10:38:17:440AM | Plasma | Ok | |
| 7 | 10:53:15:353AM | Plasma | Ok | |
| 8 | 11:06:40:937AM | Plasma | Ok | |
| 9 | 11:19:13:600AM | Plasma | Ok | |
| 10 | 11:32:52:150AM | Plasma | Ok | |
| 11 | 11:45:37:077AM | Plasma | Ok | |
| 12 | 12:08:03:007PM | Plasma | Ok | |
| 13 | 12:26:08:843PM | Plasma | Ok | |
| 14 | 12:55:00:243PM | Test | Bad | |
| 15 | 01:11:20:017PM | Plasma | Ok | |
| 16 | 01:35:55:713PM | Plasma | Ok | |
| 17 | 01:49:29:407PM | Plasma | Ok | |
| 18 | 02:02:23:613PM | Plasma | Ok | |
| 19 | 02:15:37:417PM | Plasma | Ok | |
| 20 | 02:33:31:343PM | Plasma | Ok | |
| 21 | 02:47:20:757PM | Plasma | Ok | |
| 22 | 03:01:39:637PM | Plasma | Ok | |
| 23 | 03:16:37:313PM | Plasma | Ok | |
| 24 | 03:29:07:897PM | Plasma | Ok | |
| 25 | 03:44:51:810PM | Plasma | Ok | |
| 26 | 04:01:30:533PM | Plasma | Ok | |
| 27 | 04:14:09:960PM | Plasma | Ok | |
| 28 | 04:27:47:840PM | Plasma | Ok | |
| 29 | 04:45:22:380PM | Plasma | Ok | |
| 30 | 04:57:57:337PM | Plasma | Bad | PF breaker opened, self powered ckt. fired OH1 needs to be checke |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sep 4 2009 09:00:58:793AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sep 4 2009 10:23:07:843AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||