| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Parkin,Bill Byford |
| Engineering Operator Run Comment |
| MP#532 "Sensitivity of edge pressure gradients, toroidal rotation and fl |
| Session Leader Plans |
| Entered: Mar 18 2008 04:02:32:890PM |
| Author: Brian Labombard |
| Run Plan for 1080319 MP#532 ""Sensitivity of edge pressure gradients, toroidal rotation and flow shear profiles to magnetic x-point topology"" Goal Using our extensive new set of edge and core profile/flow diagnostics, we wish to map out in detail the sensitivity of edge plasma pressure gradients and flows in ohmic L-mode plasmas as the magnetic topology is varied from lower single null (LSN) to double-null (DN) to upper single null (USN). Approach Vary x-point topology shot-to-shot in small steps from LSN through DN to USN while recording the evolution of edge pressure gradients, toroidal and poloidal flow profiles in otherwise identical plasmas. We will perform these topology scans at three different line-averaged densities, spanning the range of edge collisionalities where edge flows and toroidal plasma rotation are known to vary with x-point location. Key Diagnostics: All scanning probe systems (ASP, FSP, WASP), edge Thomson, gas-puff imaging (diodes and fast camera), inner-wall CXRS (deuterium and boron with NINJA puff), core CXRS, outer CXRS (boron with DNB pulses), HIREXs. Plan Start by reloading shot#1080314029 (0.8 MA, 5.4 tesla, LSN-USN toggle shot based on ZCUR) and make the following changes: - Increase RXU by 1.3 cm (this makes the USN a mirror-image reflection of the LSN) - Set ZCUR to be flat at the value it had in shot#1080314029 at 0.6 seconds, minus 0.2 cm (The idea is to dial-up a flat SSEP value of -0.6 cm.) - Set inner and outer gaps to be flat at the values they had in shot#1080314029 at 0.6 seconds - Set NL04 = 0.8e20 m^-2 - Fill NINJA to 10 PSI D2 - No cryopump - No ICRF - No LHRF - Yes DNB - Enable argon puff, 150 ms pulse length starting at 0.3 s A. NL04 ~ 0.8, SSEP ~ -6 mm - 3 shots Adjust x-point programming and gaps as necessary to optimize scanning probe targeting. Introduce NINJA gas puffs for inner CXRS and GPI systems. B. NL04 ~ 0.8, SSEP scan - 10 shots Perform a SSEP scan with otherwise fixed conditions. Step through a series of shots with SSEP values of -0.6, -0.3, 0, +0.3 and +0.6 cm, using suitable ZCUR programming. Optimize scanning probe plunge depths to resolve shear layer. As ZCUR is changed, the probe targeting and gaps are likely to change also. So, we will probably need a few repeat shots here. C. NL04 ~ 0.5, SSEP scan - 8 shots Change NL04 to 0.5x10^20 m-2 and repeat SSEP scan. We should have a better idea of the probe targeting based on the results from ""B"". D. NL04 ~ 1.1, SSEP scan - 8 shots Change NL04 to 1.15 x10^20 m-2 and repeat shots with LSN SSEP values of -0.6 and -0.3 cm. Change NL04 to 1.1x10^20 m-2 and take a shot or two with SSEP = 0.0 cm. Finally, Change NL04 to 1.05x10^20 m-2 and do the remaining SSEP values of +0.3 and +0.6 cm. (Note: these small tweaks in NL04 compensate for a trend of slightly higher SOL collisionality in USN compared to LSN at high densities.) |
| Physics Operators Plans |
| Entered: Mar 18 2008 03:25:22:170PM |
| Author: Steve Wolfe |
| Physop Plan for Wednesday, 19-Mar-2008
MP#532 "Sensitivity of edge pressure gradients, toroidal rotation and flow shear profiles to magnetic x-point topology" SL: LaBombard PO: wolfe ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1080314029 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, DNB, Z-bolo 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): yes Cryopump (yes/no): 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 PCS Setup: ---------- Load seg2 from 1080314029 Load seg1 from 1080305003 (30msec gas puff, rcur=1000) In seg2: RXU from -.0154 to 0.00 (Since SL says he wants it symmetric, I'll ignore the fact he asks for 1.3cm change) ZCUR flat at -.015 CLEARIN flat at -.002 (value before first sweep in 10808314029) RCUR unchanged, flat at .656 after 0.6sec NL04 from 8.5e19 to 8.0e19 Reduce argon puff from 350msec to 150msec; may need to increase this. A. 3 shots: Adjust ZCUR, xpoints, gaps for target with ssep=-6mm B. 10 shots: step zcur so as to get ssep values of -6mm, -3mm, 0, +3mm, +6mm. Initial guess is zcur=-.012, -.006, 0, +.006, +.012, but this may be off. Note that I'll need to change clearin reference for upper null cases. C. 8 shots: Repeat scan with nl04 at 0.5e20 D. 8 shots: Repeat scan with nl04 at 1.15e20 over LSN points; then reduce nl04 to 1.05e20 and do the two upper null points. |
| Session Leader Summaries |
| Entered: Mar 19 2008 10:29:50:553PM |
| Author: Brian Labombard |
| Run Summary for 1080319 MP#532 ""Sensitivity of edge pressure gradients, toroidal rotation and flow shear profiles to magnetic x-point topology"" This was a productive run. By shot#6, we had attained the desired ohmic L-mode discharge with good probe targeting, top-bottom symmetrical X-points and ZCUR control of the magnetic balance (SSEP). First, a careful shot-to-shot scan of SSEP was performed for NL04 ~ 0.85e20, covering nominal SSEP values of -0.6, -0.3, 0, +0.3 and +0.7 cm. Scanning probes (ASP, FSP, WASP) were operated at 0.8, 1.0 and 1.2 s, hitting the separatrix or slightly inside on many discharges. Before moving on to the next plasma condition, we made sure that the probes had cleanly recorded the parallel and perpendicular plasma flow velocities. NINJA D2 gas puffs on the inner and outer SOLs were timed to overlap with the last probe scan (1.2s) and continue to the end of flattop (1.5s). Jim Terry reported good signals levels on GPI diode systems. Alex Graf also obtained some excellent D CXRS flow data on the inner SOL during the gas puffs, varying with the SSEP parameter. On shot#21 we started repeating the SSEP scan for NL04 ~ 0.5e20. The DNB operated very reliably all day. Rachael reported that the outer CXRS diagnostic was optimized during the run and started to obtain good toroidal rotation measurements after shot#20. The second SSEP scan at NL04 ~ 0.5e20 went faster, making use of probe targeting information from the first scan. But, by the time we got to start the third SSEP scan (NL04 ~ 1.1e20), the shot count was 29 and we were running out of time. Anyway, we managed to do a quick and dirty SSEP scan (-0.6, 0.1, +0.75 cm) in 6 shots (of which 2 were fizzles), relying on educated guesses for the probe targeting. We were lucky. We didn't toast any probes and actually got some good profiles out of it. We may want to revisit this parameter range some time in the future, picking up the intermediate points as well. The NL04 ~ 0.8e20 ASP probe data showed the usual modulation of parallel flows near the separatrix with topology, being more co-current directed for LSN. John Rice reported good HIREX signal levels all day and did some preliminary mapping of the variation in toroidal rotation with SSEP and density. A quick look at the parallel and perpendicular velocity profile data from the probes, as it flew by during the run, revealed some clear effects that will be interesting to investigate in more detail. The location of the perpendicular velocity shear layer clearly changes in going from LSN to USN and is perhaps associated with the location of the secondary separatrix. Plasma density appears to affect the shear layer magnitude and location as well. Pressure gradients near the separatrix are reduced in going from LSN to USN, an effect that we have seen before, but now mapped out in more detail. This pressure gradient variation may connected to the shear layer behavior - stay tuned. ___________________________________________________________________________________ Quick Shot log 01-LSN, SSEP=-0.6, NL04 =0.83, Ip=0.8, Bt=5.4, No probes scanning Prad main ~ 0.36 MW, Poh ~ 1.1 MW 02-LSN, SSEP=-0.6, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+9), FSP(+4), WASP could be deeper, FSP target pulls away 03-disrupted at 0.75 s 04-LSN, SSEP=-0.58 to -0.4, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP not scanning, WASP ASP could be deeper 05-LSN, SSEP=-0.56 to -0.48, NL04 =0.85, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+12), FSP(+2), WASP 06-LSN, SSEP=-0.6 to -0.48, NL04 =0.85, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+4), WASP ASP, FSP good, WASP could be deeper 07-LSN, SSEP=-0.59 to -0.42, NL04 =0.87, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+5), WASP ASP, FSP, WASP good 08-LSN, SSEP=-0.3 to -0.18, NL04 =0.87, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+5), WASP ASP good, FSP could be deeper, WASP could be deeper 09-LSN, SSEP=-0.3 to -0.19, NL04 =0.88, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+7), WASP ASP, FSP, WASP good 10-DN, SSEP=+0.13 to +0.25, NL04 =0.9, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+7), WASP ASP, FSP far out, WASP far out - inner gap increased Prad_Main is up to ~0.48 MW now. 11-DN, SSEP=+0.0 to +0.17, NL04 =0.84, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+10), WASP ASP, FSP, WASP better, Prad_main ~ 0.3 MW 12-DN, SSEP=0.0, NL04 =0.87, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+11), WASP ASP, FSP, WASP good. 13-USN, SSEP=0.43 to 0.48, NL04 =0.81, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+11), WASP ASP, FSP far out, WASP good. 14-fizzle 15-fizzle 16-USN, SSEP=0.33 to 0.44, NL04 =0.84, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+15), WASP ASP, FSP, WASP good 17-USN, SSEP=0.68 to 0.84, NL04 =0.84, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+15), WASP ASP, FSP far out, WASP could be deeper. 18-USN, SSEP=0.65 to 0.73, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+20), WASP ASP, FSP not deep enough, WASP ok. 19-fizzle 20-USN, SSEP=0.65 to 0.83, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+22), WASP ASP, FSP, WASP ok 21-USN, SSEP=0.68 to 0.79, NL04 =0.65, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP(+20), WASP ASP, FSP, WASP ok 22-disrupted at 0.44 s 23-USN, SSEP=0.65 to 0.77, NL04 =0.5, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP(+20), WASP ASP, FSP, WASP ok 24-USN, SSEP=0.25 to 0.38, NL04 =0.5, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP(+15), WASP ASP, FSP, WASP ok 25-DN, SSEP=0 to +0.15, NL04 =0.55, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+11), FSP(+11), WASP ASP, FSP, WASP ok 26-LSN, SSEP=-0.3, NL04 =0.53, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+12), FSP(+8), WASP ASP, FSP, WASP ok 27-LSN, SSEP=-0.6 to -0.43, NL04 =0.51, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+5), WASP ASP not deep enough, FSP, WASP ok 28-LSN, SSEP=-0.56 to -0.45, NL04 =0.53, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+15), FSP(+5), WASP ASP, FSP, WASP ok 29-LSN, SSEP=-0.57 to -0.53, NL04 =1.0-1.2, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+7), WASP ASP, FSP, WASP not deep enough 30-fizzle 31-LSN, SSEP=-0.65 to -0.51, NL04 =1.1-1.3, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+15.5), FSP(+9), WASP first scans on ASP, FSP, WASP ok 32-fizzle 33-DN, SSEP=+0.1 to +0.2, NL04 =1.2, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+16.5), FSP(+15), WASP ASP is deep, FSP to 60-40 eV, WASP is far out 34-USN, SSEP=+0.7 to +0.8, NL04 =1.05-1.1, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+16.5), FSP(+24), WASP first two scans ok on ASP & FSP, WASP could be deeper, MARFE on thrid scan |
| Physics Operator Summaries |
| Entered: Mar 19 2008 05:36:51:113PM |
| Author: Steve Wolfe |
Physop summary for Wednesday, March 19, 2008
MP#532 Sensitivity of edge pressure gradients, toroidal rotation and flow-shear profiles to magnetic x-point topology.
SL: LaBombard
PO: wolfe
EO: Parkin, Pierson, Byford
This was a pretty successful run. We got through all steps A-C and
a skeleton of the high density scan (step D). The machine ran pretty
well, although we did have some fizzles in the afternoon.
The initial target setup took a little longer than expected. Getting
the FSP target steady required ramping zxl down during the shot,
and as a result the zcur had to be ramped to get ssep more or less flat.
Possibly could have done better by resurrecting the old FSP control,
but I didn't want to take the time to re-develop this. I actually did
load the predictor and controler on wire 11 as a monitor, but didn't
actually turn it on.
The LSN target condition was established at shot#7. We then proceeded to
the -3mm case (ref #8 or 9), a DN case (ref#12), a +3mm case (ref#16),
and a +6mm case (ref#20). This completed scan B at 7.5e19 (programmed).
Scan C at 4.5e19 used these starting equilibria, with density and seg2
PG3 puff reduced. Also we added an outer gap scan for JT at the end of
the flattop, after the last probe scan.
An abbreviated Scan D at 1.05 to 1.15e20 was done on shots#29-34, getting
data only at the -6mm, DN, and +6mm cases. Shots 30 and 32 fizzled. Not sure
if shot#34 (+6mm) actually gave useful data because it marfed.
The DNB ran successfully all day, with the fizzle interlock enabled so it
was prevented from firing into the wall on fizzles and disruptions. One
less thing I can blame for the five fizzles today. I suspect that the
consecutive fizzles on #14,15 may have been due to a cooling-induced
leak, but can't prove it since the RGA had died last night. The last two
fizzles followed high density rampdown disruptions, and may have been
preventable if I'd lowered the puff enough, although the lowest puffs did
lead to bouncers with some runaways.
The argon puff was reduced to 100msec after shot 10, and the HIREX guys
didn't complain loudly enough for me to hear.
There were no data system hangs all day. There was a power room entry
to check fuses after self-power circuit fired on a disruption (#3), but
no other power system problems. We did have some cooling delays, especially
in the morning, and in the afternoon had a couple of delays because
the ross relays needed to be cycled multiple times to get rid of bad
coil resistance readings. Otherwise, smooth sailing.
Scorecard:
-----------
Tests, No power shots 0
Duds 0
Fizzles 5
Plasmas 29 (2 disruptions before EOF)
=========== ==
Shots 34
|
| Session Leader Comments | |||
| Mar 19 2008 09:13:57:073AM | 1080319001 | Brian Labombard | 01-LSN, SSEP=-0.6, NL04 =0.83, Ip=0.8, Bt=5.4, No probes scanning Next: repeat with probes, inner NINJA puff, lower x-point tweak |
| Mar 19 2008 09:32:29:263AM | 1080319003 | Brian Labombard | 02-LSN, SSEP=-0.6, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+9), FSP(+4), WASP could be deeper, FSP target pulls away Next: repeat with probes deeper, x-point tweak |
| Mar 19 2008 10:05:23:997AM | 1080319004 | Brian Labombard | 04-LSN, SSEP=-0.58 to -0.4, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP not scanning, WASP ASP could be deeper |
| Mar 19 2008 10:19:44:747AM | 1080319005 | Brian Labombard | 05-LSN, SSEP=-0.56 to -0.48, NL04 =0.85, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+12), FSP(+2), WASP Next: repeat with probes deeper |
| Mar 19 2008 10:33:42:510AM | 1080319006 | Brian Labombard | 06-LSN, SSEP=-0.6 to -0.48, NL04 =0.85, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+4), WASP ASP, FSP good, WASP could be deeper Next: repeat |
| Mar 19 2008 10:51:31:153AM | 1080319007 | Brian Labombard | 07-LSN, SSEP=-0.59 to -0.42, NL04 =0.87, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+5), WASP ASP, FSP, WASP good Next: go to SSEP = -0.3 cm |
| Mar 19 2008 11:03:08:370AM | 1080319008 | Brian Labombard | 08-LSN, SSEP=-0.3 to -0.18, NL04 =0.87, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+5), WASP ASP good, FSP could be deeper, WASP could be deeper Next: repeat |
| Mar 19 2008 11:39:44:980AM | 1080319009 | Brian Labombard | 09-LSN, SSEP=-0.3 to -0.19, NL04 =0.88, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+7), WASP ASP, FSP, WASP good Next: go to DN |
| Mar 19 2008 11:40:51:840AM | 1080319010 | Brian Labombard | 10-DN, SSEP=+0.13 to +0.25, NL04 =0.9, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+7), WASP ASP, FSP far out, WASP far out - inner gap increased Prad_Main is up to ~0.48 MW now. Next: reduce inner gap, argon to 100 ms, NL04 program at 0.75e20 |
| Mar 19 2008 11:52:05:153AM | 1080319011 | Brian Labombard | 11-DN, SSEP=+0.0 to +0.17, NL04 =0.84, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+10), WASP ASP, FSP, WASP much better Next: repeat |
| Mar 19 2008 12:03:02:653PM | 1080319012 | Brian Labombard | 12-DN, SSEP=0.0, NL04 =0.87, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+11), WASP ASP, FSP, WASP good. Next: go to SSEP = +0.3 cm |
| Mar 19 2008 12:29:01:857PM | 1080319013 | Brian Labombard | 13-USN, SSEP=0.43 to 0.48, NL04 =0.81, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+11), WASP ASP, FSP far out, WASP good. |
| Mar 19 2008 01:12:50:933PM | 1080319016 | Brian Labombard | 16-USN, SSEP=0.33 to 0.44, NL04 =0.84, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+14), WASP ASP, FSP, WASP good Next: go to +0.6 mm SSEP |
| Mar 19 2008 01:18:57:043PM | 1080319017 | Brian Labombard | 17-USN, SSEP=0.68 to 0.84, NL04 =0.84, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+15), WASP ASP, FSP far out, WASP could be deeper. Next: Repeat with FSP and WASP deeper. |
| Mar 19 2008 01:53:59:543PM | 1080319018 | Brian Labombard | 18-USN, SSEP=0.65 to 0.73, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+20), WASP ASP, FSP not deep enough, WASP ok. |
| Mar 19 2008 01:57:06:590PM | 1080319020 | Brian Labombard | 20-USN, SSEP=0.65 to 0.83, NL04 =0.82, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13.5), FSP(+22), WASP ASP, FSP, WASP ok Next: NL04 ~ 0.5 |
| Mar 19 2008 02:18:55:933PM | 1080319021 | Brian Labombard | 21-USN, SSEP=0.68 to 0.79, NL04 =0.65, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP(+20), WASP ASP, FSP, WASP ok Next: repeat at lower density |
| Mar 19 2008 02:41:59:293PM | 1080319023 | Brian Labombard | 23-USN, SSEP=0.65 to 0.77, NL04 =0.5, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP(+20), WASP ASP, FSP, WASP ok Next: SSEP ~ +0.3 cm |
| Mar 19 2008 02:49:52:777PM | 1080319024 | Brian Labombard | 24-USN, SSEP=0.25 to 0.38, NL04 =0.5, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+10), FSP(+15), WASP ASP, FSP, WASP ok Next: SSEP =0 |
| Mar 19 2008 03:26:01:247PM | 1080319025 | Brian Labombard | 25-DN, SSEP=0 to +0.15, NL04 =0.55, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+11), FSP(+11), WASP ASP, FSP, WASP ok |
| Mar 19 2008 03:26:53:323PM | 1080319026 | Brian Labombard | 26-LSN, SSEP=-0.3, NL04 =0.53, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+12), FSP(+8), WASP ASP, FSP, WASP ok |
| Mar 19 2008 03:41:10:387PM | 1080319027 | Brian Labombard | 27-LSN, SSEP=-0.6 to -0.43, NL04 =0.51, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+5), WASP ASP not deep enough, FSP, WASP ok |
| Mar 19 2008 03:50:07:260PM | 1080319028 | Brian Labombard | 28-LSN, SSEP=-0.56 to -0.45, NL04 =0.53, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+15), FSP(+5), WASP ASP, FSP, WASP ok Next: go to NL04~1.15e20 |
| Mar 19 2008 04:32:39:800PM | 1080319029 | Brian Labombard | 29-LSN, SSEP=-0.57 to -0.53, NL04 =1.0-1.2, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+13), FSP(+7), WASP ASP, FSP, WASP not deep enough Next: repeat |
| Mar 19 2008 04:33:31:753PM | 1080319031 | Brian Labombard | 31-LSN, SSEP=-0.65 to -0.51, NL04 =1.1-1.3, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+15.5), FSP(+9), WASP first scans on ASP, FSP, WASP ok Next: go to DN |
| Mar 19 2008 05:13:28:943PM | 1080319033 | Brian Labombard | 33-DN, SSEP=+0.1 to +0.2, NL04 =1.2, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+16.5), FSP(+15), WASP ASP is deep, FSP to 60-40 eV, WASP is far out |
| Mar 19 2008 05:14:25:253PM | 1080319034 | Brian Labombard | 34-USN, SSEP=+0.7 to +0.8, NL04 =1.05-1.1, Ip=0.8, Bt=5.4, SP @ 0.8, 1.0, 1.2s, ASP(+16.5), FSP(+24), WASP first two scans ok on ASP & FSP, WASP could be deeper, MARFE on third scan |
| Physics Operator Comments | |||
| Mar 19 2008 07:56:51:747AM | Steve Wolfe | Starting setup for Wednesday 19-Mar-2008 MP#532 "Sensitivity of edge pressure, rotation, ... topology" SL: LaBombard PO: wolfe PCS setup- Load from 1080314029 Import seg1 from 1080305003 In seg2: Remove zcur sweep, change value from -.013 to -.015 CLEARIN flat at -.002 after .428sec; copy to wire 10,11 RXU from -.015 and higher to 0.000 from 0 to 1.5sec Note that RXL goes to .00013 at 1.031sec, leave it alone. NL04 from 8.5 to 8.0e19 *** Change clearin observer rxa,zxa *** Reset first and last rows to clear at t=-3.0, +3.0 middle row to default (zxa=-.39375) at t=0. call all of them. Note that when we go to upper null cases I'll need to change the middle one. ****************************************** PG1 pulse endtime from .65 to .45sec ============================================= Load at 19-Mar-2008 07:56:30.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| Mar 19 2008 08:07:33:027AM | Steve Wolfe | Notice that the seg1 I loaded is a 400kA startup with Ip control on, which is NOT what I wanted. Back to the drawing board. Load seg1 from 1080313001 (Ron's run with Brian last week) This has 20msec pg4 puff, RCUR=1000,Br_0=0,EF4=-1340. Raise pg4 from 20 to 25msec Load at 19-Mar-2008 08:07:19.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| Mar 19 2008 09:07:28:700AM | 1080319001 | Steve Wolfe | Shot#1: Aiming for ssep=-6mm, nl04=0.8e20 plasma to 1.8sec, no bounce, no runaways. ssep=-6mm, right gap gets pretty small early in pulse. Current not at flattop until .5sec, that's the program. FSP target is rising about 10mm between .7 and 1.5sec; needs to be flatter. |
| Mar 19 2008 09:32:12:450AM | 1080319002 | Steve Wolfe | Shot#2: Note that ZXL error is +5000 and rising Program zxl ramp down by 5mm (-1mm to -6mm) Increase zxl gain from 8 to 15 at 0.6sec Cooling is taking an extra 10 minutes because of a cell access for LH (DG). plasma full length. Brian's getting bold, he poked FSP without looking at how much I changed the target. ZXL is still high by 2000-3000m rising slowly through flattop. Still pulling away. EF4 is up by 500A, EF2L is more negative 200A. Next: program more down on ZXL, change IC_EF4 |
| Mar 19 2008 09:52:49:043AM | 1080319003 | Steve Wolfe | Shot#3: Increase ramp on zxl to -11mm at 1.5sec IC_EF4U from 0 to +1000A. Note that SSEP is now sweeping from -6mm to -2mm, presumably because I'm moving zxl. Ramp zcur down by 4mm to compensate (guess) Add FSP to wire 11, no gain. Note controller is stale. It doesn't seem to know about fsp control????? Shot went before Pat said Entering Pulse. Disrupted at 0.76sec Something comes in at .7sec. Looks like it comes down from the top. Probably unrelated to previous changes. Next: pg4 from 25 to 22 and repeat |
| Mar 19 2008 10:03:43:357AM | 1080319004 | Steve Wolfe | Shot#4: pg4 from 25 to 22. Put ALLNAMES=['PSI0','RCUR','ZCUR','CLEARIN','RXL','ZXU','RXU','FSP'] into controller keyword for wire 11 (FSP). Still with zero gain. plasma full length. No FSP this time. FSP target seems to be fairly steady according to the predictor,rising maybe 3mm? And SSEP is still rising too by 2mm. Drop zcur by 2mm at eof. |
| Mar 19 2008 10:18:03:933AM | 1080319005 | Steve Wolfe | Shot#5: Drop zcur by 2mm to -.021 at eof. Leave zxl ramping from -1 to 11mm from .6 to 1.5 Load complained about fsp controller entries. Had to adjust timeconst. Not sure why it didn't complain on shot4??? Plasma full length, fsp pokes. Startup a bit sluggish. SSEP between -5 and -4mm. Brian says live with it. |
| Mar 19 2008 10:30:57:293AM | 1080319006 | Steve Wolfe | Shot#6:pg4 from 22 to 20msec plasma full length. No bounce, no hesitation. Next: change fsp monitor waveform on wire 11 from 0 to -.005 (just for scale) otherwise repeat |
| Mar 19 2008 10:45:49:810AM | 1080319007 | Steve Wolfe | Shot#7: change fsp monitor waveform on wire 11 from 0 to -.005 (just for scale) otherwise repeat plasma full length, startup looks ok, breakdown a little late. FSP error around -2000A-m (was -6000). That's consistent. Next: Aim for ssep -3mm. |
| Mar 19 2008 11:04:12:717AM | 1080319008 | Steve Wolfe | Shot#8:Aim for ssep -3mm: zcur ramp from [-.015,-.019] to [-.009,-.015] Note: not a uniform shift, trying to flatten it out a bit. plasma, ssep scanning from -3 to -2mm. BLaB says leave it alone. Note that clearin error is +4000 dropping to zero, alternate clearin on wire 10 is ~-1500 (ref to upper xpoint). Next: no changes |
| Mar 19 2008 11:16:18:950AM | 1080319009 | Steve Wolfe | Shot#9:no changes plasma full length. startup ok. Next: aim for DN |
| Mar 19 2008 11:32:15:497AM | 1080319010 | Steve Wolfe | Shot#10: Aim for DN, also smaller inner gap by 1mm ZCUR ramp from [-.009,-.015] to [-.003,-.009] (play it straight this time) CLEARIN from -.002 to -.001. No change to RCUR. plasma full length, some inner wall marfing after 1sec Density is a little higher. Inner gap got bigger, now 1.5 was 1.1, he wanted 1.0 Next: tweak zcur, clearin |
| Mar 19 2008 11:47:42:170AM | 1080319011 | Steve Wolfe | Shot#11: zcur ramp from [-.003,-.009] to [-.003,-.011] reduce argon to 100msec clearin from -.001 to -.004 (went the wrong way last time!) nl04 from 8 to 7.5e19 Rcur from .656 to .655 plasma full length. No marfy this time, density is down a bit. Looks like it's more DN this time too. Next: reduce pg4 by 1msec, no other changes |
| Mar 19 2008 12:00:40:793PM | 1080319012 | Steve Wolfe | Shot#12: reduce pg4 from 20 to 19msec, no other changes plasma, short marfe early. Next: Go to upper null (ssep=+3mm) |
| Mar 19 2008 12:18:13:997PM | 1080319013 | Steve Wolfe | Shot#13: upper null ssep=+3mm Add clearin at 0.75sec, zxa=.394 zcur ramp from [-.003,-.011] to [+.003,-.005] plasma, some early runaways?. Time to start putting gas back in. Got ssep~4 to 5mm. Clearin error has a jump of ~3000 at ref switch, better after than before according to efit. Next: decrease zcur, switch clearin observer earlier. Add some pg4 |
| Mar 19 2008 12:27:55:573PM | 1080319014 | Steve Wolfe | Shot#14: decrease zcur ramp to [.001,-.007], switch clearin observer at .5sec instead of .75. pg4 from 19 to 20ms fizzle. Did I do too much or too little? Too much I think. Next: back down on pg4 |
| Mar 19 2008 12:40:30:810PM | 1080319015 | Steve Wolfe | Shot#15: pg4 from 20 to 18msec Still trying for ssep=+3mm zcur ramp to [.001,-.007], switch clearin observer at .5sec instead of .75. Another fizzle. RGA is broken, but I think maybe we have a leak? Base pressure is up from earlier in the day, CIII signal is higher and Halpha is not burning out. Next: drop pg4 even more, see if it helps. |
| Mar 19 2008 01:01:06:497PM | 1080319016 | Steve Wolfe | Shot#16: pg4 from 18 to 15msec request back off on cooling; vessel temp is 19C, doesn't seem bad. IGT in INIT is 9.3e-7, vessel 20C. Longish delay for cooling CCins. Fizzle detector is keeping dnb off. Still trying for ssep=+3mm zcur ramp to [.001,-.007], switch clearin observer at .5sec instead of .75. plasma is back. good current rise, no hards. SSEp 3-4mm, should be ok, left gap looks good at 11mm or so. Next: Move on to +6mm case |
| Mar 19 2008 01:11:06:497PM | 1080319017 | Steve Wolfe | Shot#17: Move on to +6mm case zcur ramp to [+.007,-.001]. leave clearin alone pg4 still at 15msec IGT at 1.3e-6 in INIT, vessel 19C plasma full length. SSEP is around 8mm. Next: reduce inner gap by 1mm |
| Mar 19 2008 01:24:26:870PM | 1080319018 | Steve Wolfe | Shot#18: reduce inner gap by 1mm clearin from -.004 to -.005 rcur from .655 to .6545 pg4 from 15 to 14msec IGT in INIT:2.3e-6 Tvess:18C plasma full length Next: Step C- Nl04 to 4.5e19? |
| Mar 19 2008 01:38:56:450PM | 1080319019 | Steve Wolfe | Shot#19: Repeat for better FSP, don't drop the density yet. pg4 from 14 to 13msec Vessel at 18C, IGT=2.4e-6 in INIT fizzle. looks like it moves in, but there is a spike on dalpha and CIII at 12msec Next: Br0 to -.0002, pg4 to 12msec. |
| Mar 19 2008 01:47:42:090PM | 1080319020 | Steve Wolfe | Shot#20: Br0 to -.0002, pg4 to 12msec. IGT=1.2e-6 in INIT, 18C plasma full length. That one bounced hard but survived. Back up in pg4 I think. Next: Now on to step C? |
| Mar 19 2008 02:02:47:997PM | 1080319021 | Steve Wolfe | Shot#21: pg4 from 12msec to 14msec nl04 from 7.5 to 4.5e19 (step C) 1.5e-6, 18C in INIT plasma full length, good looking startup, but density is 7e19. PG3 is off after .5sec, it's running on the walls and the NINJA after that. Next: reduce pg3 in seg2 |
| Mar 19 2008 02:21:53:747PM | 1080319022 | Steve Wolfe | Shot#22: remove pg3 in seg2 outer gap scan for JT: move out by 9mm from 1.25sec to 1.5sec so rcur from .6545 to .6590 leave pg4 at 14msec 1.4e-6, 16C in INIT disruption at .45sec; bad early bounce again. oh1 crowbarred after the disruption. Happened in crossover. Big injection at 0.42sec next: repeat? |
| Mar 19 2008 02:34:15:167PM | 1080319023 | Steve Wolfe | Shot#23: repeat. If 22 hadn't bounced I'd lower pg4 for disruption recovery, but as it is, just leave it, probably raise on next shot. in INIT: 18C, 9.3e-7 plasma with runaways. Probably better than no plasma at all. small bounce, got 5e19, at least until the ninja. Got the outer gap scan. There is an injection around crossover, but no bite out of the current. Next: start back up on pg4 |
| Mar 19 2008 02:45:40:760PM | 1080319024 | Steve Wolfe | Shot#24: pg4 from 14 to 16msec on to 3mm: import seg2 from #16 load nl04 from #23 load rcur from #23 zero pg3 in seg2. plasma, still some runaways, but not as bad as 23, still a small bounce. next: raise pg4 again, maybe back to DN |
| Mar 19 2008 02:57:30:463PM | 1080319025 | Steve Wolfe | Shot#25: pg4 from 16 to 18msec import seg2 from shot#12 (DN) import seg3 from shot#24, seg2 to use for copying copy rcur, nl04, pg3 from seg3 to seg2. plasma, still some hards, still has a bounce. Maybe time for rcur offset? |
| Mar 19 2008 03:20:18:370PM | 1080319026 | Steve Wolfe | Shot#26: pg4 from 18 to 20 msec; rcur offset from 1000 to 1800 import seg2 from shot#9 (-3mm) copy rcur, nl04, pg3 from seg3 to seg2. 18C, 8.3e-7 at INIT after 20min (needed ross relays cycled) plasma no runaways, no bounce looks good enough to me, see what Brian thinks. |
| Mar 19 2008 03:32:57:183PM | 1080319027 | Steve Wolfe | Shot#27: import seg2 from shot#7 (-6mm) copy rcur, nl04, pg3 from seg3 to seg2. No seg1 changes this time. 17C, 1.1e-6 at INIT (on the beep) plasma full length, no runaways. good lsn case Next: Raise density (step D)? |
| Mar 19 2008 03:45:27:543PM | 1080319028 | Steve Wolfe | Shot#28: Need to repeat for ASP scan since I already started to change it, reimport seg2 from 27. change rcur for JT: rcur at 1.4sec=.660, also at 1.5 No seg1 change plasma full length, no runaways, no bounce I think JT got his gap scan. Next: on to 1.15e20? |
| Mar 19 2008 04:02:11:340PM | 1080319029 | Steve Wolfe | Shot#29: nl04 to 1.15e20, put back a pg3 puff in seg2 (step D) No seg 1 changes (maybe should have dropped pg4 a bit?) plasma to 1.75sec, nl04=1.1 before 0.8sec, 1.17 at 1.0sec startup looks good, could use some more pg3 around .2 to .3sec Next: increase pg3 in seg2, ramp nl04 a little faster |
| Mar 19 2008 04:11:03:560PM | 1080319030 | Steve Wolfe | Shot#30: increase pg3 in seg2, ramp nl04 a little faster pg4 from 20 to 19msec 14C, 1.2e-6 at INIT fizzle. Needed to drop it by more than 1msec I guess. |
| Mar 19 2008 04:23:13:107PM | 1080319031 | Steve Wolfe | Shot#31: pg4 from 19 to 16msec Still trying for D.1 - LSN @1.15e20 plasma no runaways. Next: skip to DN case (D.3 like #12 but 1.1e20) |
| Mar 19 2008 04:36:28:477PM | 1080319032 | Steve Wolfe | Shot#32: skip to DN case (D.3 like #12 but 1.1e20) import seg3 from #31 seg2 import seg2 from #12 seg2 (DN case) copy nl04, rcur, pg3 from seg3 to seg2 reduce nl04 to 1.1e20 PG4 from 16 to 15msec fizzle. halpha never comes down. |
| Mar 19 2008 04:56:22:710PM | 1080319033 | Steve Wolfe | Shot#33: pg4 down from 15 to 13msec still trying DN case (D.3 like #12 but 1.1e20) delay for cycling oh1 ross relay again. 16:30 in recool! plasma to 1.85. some runaways early, not bad. Big bounce, almost lost it. density looks ok, SSEP +1 to +3mm. |
| Mar 19 2008 05:07:59:317PM | 1080319034 | Steve Wolfe | Shot#34: pg4 to 14msec Go to full upper null like shot 20 import seg2 from #20, copy nl04,rcur,pg3 from seg3 reduce nl04 to 1.05e20. cross fingers and hope for a plasma even though it's after 17:00 plasma with marfe. END OF RUN. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:59:45:120AM | Plasma | Ok | |
| 2 | 09:23:10:543AM | Plasma | Ok | |
| 3 | 09:42:21:010AM | Plasma | Ok | |
| 4 | 09:57:32:980AM | Plasma | Ok | |
| 5 | 10:10:02:323AM | Plasma | Ok | |
| 6 | 10:24:23:170AM | Plasma | Ok | |
| 7 | 10:39:40:090AM | Plasma | Ok | |
| 8 | 10:53:57:167AM | Plasma | Ok | |
| 9 | 11:09:19:607AM | Plasma | Ok | |
| 10 | 11:24:30:887AM | Plasma | Ok | |
| 11 | 11:41:56:293AM | Plasma | Ok | |
| 12 | 11:54:16:513AM | Plasma | Ok | |
| 13 | 12:11:10:310PM | Plasma | Ok | |
| 14 | 12:24:14:717PM | Plasma | Ok | |
| 15 | 12:36:40:403PM | Plasma | Ok | |
| 16 | 12:53:00:510PM | Plasma | Ok | |
| 17 | 01:06:22:903PM | Plasma | Ok | |
| 18 | 01:19:14:293PM | Plasma | Ok | |
| 19 | 01:31:51:107PM | Plasma | Ok | |
| 20 | 01:44:23:450PM | Plasma | Ok | |
| 21 | 01:57:44:247PM | Plasma | Ok | |
| 22 | 02:12:06:260PM | Plasma | Bad | CommFailure OH2U |
| 23 | 02:29:02:950PM | Plasma | Ok | |
| 24 | 02:41:31:153PM | Plasma | Ok | |
| 25 | 02:54:03:420PM | Plasma | Ok | |
| 26 | 03:16:49:450PM | Plasma | Ok | |
| 27 | 03:29:21:073PM | Plasma | Ok | |
| 28 | 03:41:54:573PM | Plasma | Ok | |
| 29 | 03:55:34:857PM | Plasma | Ok | |
| 30 | 04:08:13:200PM | Plasma | Ok | |
| 31 | 04:20:41:920PM | Plasma | Ok | |
| 32 | 04:33:18:340PM | Plasma | Ok | |
| 33 | 04:51:59:313PM | Plasma | Ok | |
| 34 | 05:04:58:520PM | Plasma | Ok | |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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