| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Parkin,Ed Fitzgerald |
| Engineering Operator Run Comment |
| entered by josh |
| Session Leader Plans |
| Physics Operators Plans |
| Entered: Feb 23 2010 03:23:01:083PM |
| Author: Steve Wolfe |
| Physop Plan and Engineering setup for Wed. 24-Feb-2010
MP#591 Boundary Layer Heat Transport Experiments in H-mode Plasmas SL: LaBombard, Terry PO: wolfe ------------------------------ Overnight ECDC Parameters ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s ------------------ Engineering setup ------------------ Run begins at 09:00 and ends at 17:00 Power systems as on: 1100223023 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, HiREX Sr, Z-bolo, B-spectrometer Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): no Vessel temperature: 35/35/35 Physop Plan: ------------- Start from a likely shot from Tuesday, modify segment 1 for lack of cryopump. Throw a dart at figure 6 in the MP and run the parameters corresponding to the nearest blue diamond. At some point we will probably try a DN case (ref 1091110012 at 800kA) |
| Session Leader Summaries |
| Entered: Feb 25 2010 01:54:20:573PM |
| Author: Brian Labombard |
| Run Summary for 110223 and 110224
MP#591 "Boundary layer heat transport experiments in H-mode plasmas" These back-to-back runs where scheduled to attack two primary goals: (1) push forward with exploring divertor heat flux footprints in the wide parameter space outlined in MP591 and (2) optimize the use of overnight boronization, which requires about 10 shots to clean-up the boron coatings on the outer divertor. Run 1100223 We started with a fresh boronization, using 0.8 MA, 5.4 tesla discharges with a strike point sweep to clean up the boron and get the RF conditioned up. Immediately, we got hammered by a cPCI problem -- the thermocouple data for the 'ramped tiles' were not being stored because the unit responsible for this was getting gronked some time during the plasma pulse. We scrambled around for a while, worrying about spurious input signals and perhaps RF noise affecting the unit. Anyway, under the threat of swapping-out the card, it settled down after shot#10 and worked for the remaining two run days. Meanwhile, the outer divertor and RF systems steadily conditioned up. Shot#12 was a nice shot to start from -- steady EDA with 3MW RF power, fixed strike point LSN. Radiated power was fairly high so Psol was under 1 MW (all the bolometry comments will need to be verified later). Peak surface temperatures were ~700C. Then we started dropping the RF power to get a Psol scan. Dropping the RF power actually lead to higher temperatures on the divertor surface in many cases. Shot#16 (2MW RF) had ~800C temperatures initially in the shot because the radiated power was lower leading to Psol~ 1.5 MW at that time. Shots 17-19 finished the power scan with 1.0 MW and 1.5 MW cases, with the 1 MW case leading to L-mode and a late L-H transition. Again, despite the RF power 'knob', the strongest Psol variation came from variations in Prad, which evolved during the shots. Surface temperatures in the 1 MW L-mode case were similar to the 2 MW H-mode case because of the low Prad in L-mode. At this point, we did not dare go to the 4.5 MW ICRF data point, worrying that we would just burn through the boronization faster, leading to high Prad and stopping our wagon train. (Besides, higher ICRF power was not translating into higher Psol.) So we pushed ahead with lower-current discharges instead. Shot#20,21,22 were 0.5 MA cases, with #22 being the best at the 1.5 MW ICRF level. Psol was steady at the 1.5 MW level but the power widths appeared to be larger so the surface temperatures got up to only ~700 C max. L-mode data was taken on shot#23 (1.2 MW ICRF). Raising ICRF to 2.5 MW, we got Psol up to the ~2MW level at this current/density, so surface temperatures started to exceed 800 C (shot#24) and then 1000 C (shot#26). Raising the RF power to 3.5MW did not result in significantly higher divertor surface temperatures (shots 27,28), again because Prad was a controlling factor. Shot#29 was a higher density (NL04~ 0.71 instead of ~0.57), but the footprint looked similar. The day ended with a higher-density attempt, NL04~ 0.85, but the ICRF was out of tune. We got an L-mode with low input power and no IR footprint to look at. Run 1100224 Picking up where we left off, we started 1100224 with a 0.5 MA shot, trying to obtain the higher density data point (NL04 ~ 0.9). This proved to be a bit difficult because of the tendency for high edge neutral pressures, which the ICRF does not like (faulting). Dialing the density back down, we managed to access a steady EDA again (shot#4) and then do it at slightly higher density (NL04~ 0.7, shots 5 & 6). We then proceeded to repeat some RF power points with a swept strike point. This would in principle allow us to relate the heat flux profiles to the Langmuir probe data (although the quality of the data from probe#8 was not known). Anyway, by now the LPs were clean of the boron layer. Shot#7 was the first strike-point sweep, not quite reaching far enough up beyond probe#8. At this point in the run, ALCDAQ3 decided that it had worked hard enough for the day; it was not going to run any more analysis jobs. EFIT, Langmuir probe data analysis, IR camera data archive and analysis, tile TC analysis... had to be run manually for the rest of the day. This slowed things down a bit as we could not look at data right away. (Also, Tom and Josh spent some time poking around, with extended shot delays.) Shot#8 and 9 (best) was a good strike-point sweep at 0.5 MA, NL04~0.7, 2.3 MW ICRF. Psol was around 1 MW. The IR footprint looks clean when it is on the nose tiles. It will be interesting to see if the thermal analysis (which has yet to be coded up) will yield a similar heat flux profile there as on the vertical face tiles. Shots 10 and 11 (best) are lower density versions of 8 and 9 (NL04~0.55). We then dialed up 0.8 MA with strike-point sweep. Shots 13, 14, 15 were attempts at getting stationary EDAs. 15 was the best, but it tripped out of EDA just before1.3 s. Despite the 2.4 MW of ICRF, Psol dropped down to 0.5 MW, then only back up to 1.2 MW by the end. Thinking that a fixed strike point would be better (lower Prad) we went back to that. Shot#16 was a first attempt -- a few EDAs and RF trips mixed together. For some reason, shot#17, the second attempt, stayed in L-mode -- a gem of a shot in disguise. Psol stayed above 2.2 MW and the ICRF was clean. This shot yielded the highest surface temperatures of the day, almost 1300 C, with a well-defined footprint. We turned the ICRF up to 2.5 MW and got another gem of a shot -- a steady EDA (shot #18). But now Psol was down to 1 MW; peak surface temperatures only got to ~700 C. Recognizing that we weren't going to get much out of higher density or Ip discharges, we decided to focus the remainder of the run on LSN-DN comparison shots. The target conditions where Ip=0.5 MA, NL04~ 0.6. Shot #20 was the first attempt, sweeping SSEP from -1.3 to -0.6 cm. Shots 21 through 27 were various combinations of SSEP control at 2MW ICRF with SSEP from -1.3 to +0.2 cm. Shot#25 tried to go to DN quickly; Shot#26 held it in LSN. Shot#27 was a gradual sweep. Unfortunately the IR camera stabilization software did not lock properly on this shot. Finally, we dialed the RF power down to 1MW and did the slow-sweep SSEP scan. These shots had low surface temperatures (~500 C); the IR footprints look complicated, may be dominated by surface artifacts and difficult to interpret. Shot log from 1100223 1-LSN, 5.4 tesla, 0.8 MA, NL04~1.0 L-mode, ICRF conditioning strike-point sweep probes are boron-coated bug in IR camera software - need to rerun by hand 2-LSN, 5.4 tesla, 0.8 MA, NL04~1.0 short H-mode, ICRF conditioning strike-point sweep ICRF ramp up to 2 MW (J) probes are reading bogus high te values (boron-coated) Two integration times, some pixels saturated 3-LSN, 5.4 tesla, 0.8 MA, NL04~0.9 at RF turn-on EDA, ICRF conditioning ramp, with trips, to 2+ MW strike-point sweep probes are boron-coated One integration time on IR 4-LSN, 5.4 tesla, 0.8 MA, NL04~0.9 at RF turn-on EDA NL04~1.9 ICRF conditioning ramp, J looks clean, D+E conditioning up strike-point sweep probes are getting better No thermocouple data - CPCI problem at F-port 5-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on EDA NL04~1.8 ICRF conditioning ramp strike-point sweep Still no thermocouple data - CPCI problem at F-port We may need to swap out a card. 6-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on multi H-modes ICRF conditioning, multiple trips, 3 to 4 MW Prad foil ~ 2 MW strike-point sweep Thermocouple data ok on this shot. 7-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on two H-modes, EDAs NL04~1.8 ICRF conditioning, 2 to 4 MW Prad foil ~ 2 MW strike-point sweep Thermocouple data ok on this shot. 8-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on EDA NL04~1.8 ICRF conditioning, trips, 3 to 4 MW Prad foil ~ 2.4 to 3.2 MW strike-point sweep Thermocouple data ok on this shot. 9-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on EDA NL04~1.8 ICRF conditioning, trips, 3 to 4 MW Prad foil ~ 2.4 to 3.2 MW strike-point sweep No thermocouple data 10-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on three EDAs ICRF 3MW, some trips. Prad foil up to 2.7 MW strike-point sweep No thermocouple data 11-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on two EDAs ICRF 3MW, some trips. Prad foil up to 2.4 MW fixed strike point - on the nose Thermocouple data ok. 12-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on steady EDA, nice shot. ICRF 3MW, clean, starting at 0.7 seconds Prad foil ~2.1 MW fixed strike point - below the nose, with slight ramp up in time Thermocouple data is ok. 13-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on steady EDA. ICRF 3MW, E has some trips Prad foil ~2 MW fixed strike point on tile #4 Thermocouple data ok. 14-LSN, 5.4 tesla, 0.8 MA, NL04~0.85 at RF turn-on evolving EDA. ICRF 2MW Prad foil stair-steps from 1 to ~1.6 MW for some reason fixed strike point on tile #4 Thermocouple data ok. Saturated frames on IR camera - oops. 15 - fizzle 16-LSN, 5.4 tesla, 0.8 MA, NL04~0.9 at RF turn-on evolving EDA. ICRF 2MW clean Prad foil rises ~1.7 MW fixed strike point on tile #4 Thermocouple data ok. 17-LSN, 5.4 tesla, 0.8 MA, NL04~0.9 at RF turn-on L-H transition at 1.3 seconds to EDA. ICRF 1MW with trips Prad foil rises ~0.4 to 0.7 MW in H-mode fixed strike point on tile #4 Thermocouple data ok. 18-LSN, 5.4 tesla, 0.8 MA, NL04~0.9 at RF turn-on Steady EDA, NL04~1.7 ICRF 1.5 MW with trips Prad foil rises ~1.3 MW fixed strike point on tile #4 Thermocouple data ok. 19-LSN, 5.4 tesla, 0.8 MA, NL04~0.9 at RF turn-on Steady EDA, NL04~1.8 ICRF 1.5 MW clean Prad foil rises ~1.6 MW fixed strike point on tile #4 Thermocouple data ok. Next: go to 0.5 MA 20-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on Initial EDA, NL04~1.0, then radiation-disruption at 0.9 seconds ICRF 1.5 MW clean up to disruption Prad foil rises ~0.8 MW Fixed strike point is a bit low. Thermocouple data ok. 21-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on Initial EDA, NL04~1.0, impurity injection, then steady EDA after that, NL04~0.9 ICRF 1.5 MW clean Prad foil ~ 1.2 MW after impurity spike Fixed strike point on tile#4 Thermocouple data ok. 22-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on steady EDA, NL04~0.9 ICRF 1.6 MW clean Prad foil ~ 0.8 MW Fixed strike point on tile#4 Thermocouple data ok. 23-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on LH transition at 1.3 seconds to steady EDA ICRF 1.2 MW clean Prad foil ~ 0.5 MW rising to 0.7 MW at EDA Fixed strike point on tile#4 Thermocouple data ok. 24-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on steady EDA ICRF 2.5 MW clean Prad foil ~ 1.1 MW Fixed strike point on tile#4 IR camera is slightly saturated. Thermocouple data ok. 25-LSN, 5.4 tesla, 0.5 MA, NL04~0.57 at RF turn-on EDA, impurity injection, EDA again ICRF 2.5 MW with one drop out Prad foil settles to ~ 1.3 MW Fixed strike point Thermocouple data ok. 26-LSN, 5.4 tesla, 0.5 MA, NL04~0.57 at RF turn-on Steady EDA, nice shot ICRF 2.5 MW clean Prad foil ~ 1 MW Fixed strike point Thermocouple data ok. 27-LSN, 5.4 tesla, 0.5 MA, NL04~0.57 at RF turn-on Steady EDA ICRF 3 to 3.5 MW, E tripping Prad foil ~ 1.7 MW Fixed strike point Thermocouple data ok. 28-LSN, 5.4 tesla, 0.5 MA, NL04~0.57 at RF turn-on Steady EDA until 1.3 seconds when impurities hit ICRF 3.5 steady to 1.3 s Prad foil ~ 1.5 MW Fixed strike point Thermocouple data ok . 29-LSN, 5.4 tesla, 0.5 MA, NL04~0.71 at RF turn-on Steady EDA ICRF 3.5 steady to 1.25 s then E drops out plus other trips Prad foil ~ 1.5 MW Fixed strike point Thermocouple data ok. 30-LSN, 5.4 tesla, 0.5 MA, NL04~0.85 ICRF out of tune. L-mode Prad foil ~ 0.3 MW Fixed strike point Thermocouple data ok. IR strike point is too dim to see Shot log from 1100224 1-LSN, 5.4 tesla, 0.5 MA, NL04~0.95 at RF turn-on ICRF ~2 MW with dropouts neutral pressure is a bit high for ICRF no H-mode? Prad foil ~ 0.8 MW Fixed strike point Thermocouple data ok. 2-LSN, 5.4 tesla, 0.5 MA, NL04~1.0 at RF turn-on ICRF ~2 MW with dropouts neutral pressure is still high two short H-modes Fixed strike point Thermocouple data ok. 3-LSN, 5.4 tesla, 0.5 MA, NL04~0.9 at RF turn-on ICRF ~2 MW with dropouts neutral pressure is still high Fixed strike point Thermocouple data ok. No LP data on this shot. 4-LSN, 5.4 tesla, 0.5 MA, NL04~0.5 at RF turn-on ICRF ~3 MW with dropouts from D and E Steady EDA Fixed strike point Thermocouple data ok. two integration times on IR Saturates on some frames 5-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~2 to 3.2 MW with dropouts from D and E Steady EDA, NL04 ~ 1.0 Fixed strike point Appears to be a fresh coating on the tiles; emissivity is up Thermocouple data ok. 6-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~3.3 MW with a couple of dropouts Steady EDA, NL04 ~ 1.0 Fixed strike point Prad foil ~ 1.7MW Thermocouple data ok. 7-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~3.2 to 2.4 MW with D tripping out Steady EDA, NL04 ~ 1.1 swept strike point - did not go quite far enough Prad foil peaks at ~ 2MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 8-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~3.2 to 2.2 MW again with D tripping out Steady EDA, NL04 ~ 1.1 swept strike point - looks good, probe #8 sees full sweep Prad foil peaks at ~ 1.8MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 9-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~2.3 MW mostly clean (some trips early and late) Steady EDA, NL04 ~ 1.1 swept strike point Prad foil peaks at ~ 1.5MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 10-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on ICRF ~2.3 MW EDAs interrupted by two drop-outs swept strike point Prad foil peaks at ~ 1.3MW prior to first dropout Thermocouple data ok. Analysis jobs did not run automatically on this shot. 11-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on ICRF ~2.4 MW mostly clean (some trips early and late) Steady EDA, NL04 ~ 1.05 swept strike point, probe#8 data look good Prad foil bumps up to ~ 1.7MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. Next: go to 0.8 MA 12-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.3 MW, but trips off (J only) Truncated EDA, then an ohmic EDA swept strike point, beyond probe#8 Prad foil up to ~ 1.7MW then spikes during RF trip leading to H-L Thermocouple data ok. Analysis jobs did not run automatically on this shot. 13-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.4 MW, with some trips Three ELM-free like H-modes swept strike point, beyond probe#8 Prad foil up to ~ 2.3MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 14-LSN, 5.4 tesla, 0.8 MA, NL04~1.0 at RF turn-on ICRF ~2.4 MW, with some trips Two H-modes swept strike point, beyond probe#8 Prad foil up to ~ 2.3MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 15-LSN, 5.4 tesla, 0.8 MA, NL04~1.0 at RF turn-on ICRF ~2.4 MW Multiple H-modes swept strike point, beyond probe#8 Prad foil up to ~ 2.5MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 16-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.0 MW Injections, big one at 0.9 seconds May be on tungsten tile? Three H-modes fixed strike point Prad foil up to ~ 1.9MW on later H-modes Thermocouple data ok. Analysis jobs did not run automatically on this shot. 17-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.0 MW, very clean Steady L-mode, surface temps almost hit 1300 C, nice footprint fixed strike point Prad foil at 0.7MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. 18-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.5 MW, very clean, J+D+E Steady EDA, NL04~1.9 fixed strike point Prad foil peaks at 2.2 MW Thermocouple data ok. LP and HF analysis jobs did not run through on this shot. 19-fizzle Go to 0.5 MA with SSEP sweep 20-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on SSEP -1.3 to -0.6 cm ICRF 2 MW,D and E trips Steady EDA,NL04~1.0 fixed strike point Prad foil peaks at 1.4 MW Thermocouple data ok. LP and HF analysis jobs did not run through on this shot. lp_anal_fmp.log: CALL_EXTERNAL: Error loading sharable executable. libg2c.so.0: cannot open shared object file: No such file hf_anal.log: call_bknot.so: wrong ELF class: ELFCLASS32 21-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on SSEP -1.2 to +0.2 cm ICRF 2 MW clean Steady EDA,NL04~1.0, rising density late fixed strike point on lower divertor Prad foil peaks at 1.3 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. Next: sweep SSEP faster 22-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP -1.2 to +0.2 cm, get there by 1 second ICRF 2 MW, D,E trip at 1.1s Two EDAs,NL04~1.1, fixed strike point on lower divertor Prad foil peaks at 1.5 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. 23-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP -1.2 to +0.2 cm, get there by 1.1 seconds ICRF 2 MW clean steady EDA,NL04~1.1 fixed strike point on lower divertor Prad foil peaks at 1.5 MW then drops Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. 24 - fizzle 25-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP -1.2 to +0.2 cm, get there by 0.85 seconds ICRF 2 MW clean steady EDA,NL04~1.1 IR footprint is weak in this DN discharge. Prad foil peaks at 1.4 MW then drops Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. 26-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP fixed at -1.2 cm ICRF 2 MW, some trips steady EDA,NL04~1.1 Prad foil peaks at 1.7 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. 27-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP sweep -1.2 to +0.2 cm arriving at +0.2 at 1.4 s ICRF 2 MW, clean steady EDA,NL04~1.1 Prad foil peaks at 1.7 MW IR did not lock properly - need to do a manual adjust. Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. 28-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP sweep -1.2 to +0.2 cm arriving at +0.2 at 1.4 s ICRF 1 MW, 1 trip two H-modes, first at 1s Prad foil peaks at 0.5 MW in L-mode Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. 29-LSN, 5.4 tesla, 0.5 MA, NL04~0.83 at RF turn-on SSEP sweep -1.2 to +0.2 cm arriving at +0.2 at 1.4 s ICRF 1 MW, clean steady L-mode Prad foil peaks at 0.58 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Physics Operator Summaries |
| Entered: Feb 24 2010 06:05:26:697PM |
| Author: Steve Wolfe |
Physop summary for Wednesday, Feb 24, 2010
MP#591 Boundary Layer Heat Transport Experiments in H-mode Plasmas
SL: Labombard
PO: wolfe
EO: Pfeiffer, Parkin, Fitzgerald
The machine ran pretty well today, but the server that normally
deals with the automatic analysis jobs (default submit server,
aka Alcdaq3) stopped analyzing on shot#7, requiring a lot of these
to be done by hand. Nevertheless, we got through a lot of the
(unpublished, stealthy) run plan.
Initially we had some neutral
pressure issues trying to pick up the high density point from the
end of the 500kA density scan from yesterday. Also, the tile
emissivities were high again on the first few shots, apparently
because the boron got spread around by the ECDC. I also spent some
time adjusting the NL04 gains for use without the cryopump. This was
established by shot#5 at PID=[3,1.5,8]. Shots #5 and 6 were at
500kA, 7e19.
We then did some shots with strikepoint sweeping up around the nose
(#7-9 at 7e19, then #10-11 at 5.5e19).
After that, we went back to 800kA, nl04=9e19 (#12,13), then raised
nl04 to 1e20 (#14,15). These were run out of seg3, with gains on
NL04 loaded from seg2.
Next we ran fixed strikepoint cases at 800kA, 9e19, as on 1100223016,
out of seg4, again with nl04 gains from seg2 (#16-18).
Finally, we began the sequence to look at the behavior of the
heat flux width on SN vs DN. Shot#20 started from fixed strike
at 500kA, 5.5e19, with ZCUR swept from -.015 to -.005, which wasn't
far enough. Shot#21 ran up to ZCUR=+0.005, and dropped ZXU from
+.02 to +.01, which made a pretty good looking DN, SSEP maybe
1-2mm positive at the end. On shot#22 RXU was held in (-.007)
to avoid the leading edge at the cryopump inlet.
These settings were used for the "DN" condition for the remainder of
the day. Shots#23 had the sweep timing changed, but was otherwise
similar. Shot#25 did the sweep to "DN" at .75sec, just at the beginning
of the H-mode, intended as a constant DN case, and Shot#26 was a
corresponding constant LSN case, with ZCUR fixed at -.015. Unfortunately,
the Prad on these was too high and the Psol was very low, so that
the IR camera was not seeing much heatflux to compare in either case
(both these were done at Prf=2MW).
Shots#27-29 were back to doing slow sweeps from LSN to DN, as on #21.
#28 and 29 were at lower power, trying to get L-mode, which succeeded
on #29.
The startup early in the day (adapted from Tuesday) had bad
bounces and some runways. I modified the RCUR offset, IC_EF4,
the BR_0 offset. I think the change in IC_EF4 to -1290 at shot#6
was the most effective change, as this eliminated the bounce,
and after shot#7 the runaways were gone until shot#23, which had an
xray burst early and all
shots ran clean except #19, on which EF1L commutated early resulting
in a dud. Then shot#24 had a runaway startup disruption, and it was
back to tweaking. The startups on #25-29 weren't terrible, but
there were runaways again, in varying degrees, on all of them.
If we had kept going, I might have remembered to try dropping the
OH1_VOLT programming, but I didn't.
After the run, Josh rebooted the server and is trying to see if
the submit server will work again. Shots#30-? are tests.
Scorecard (through 17:00):
----------
Tests/No power 0
Duds 1 (power systems)
Fizzle/startup dis. 1
Plasmas 27
========= ===
Shots 29
|
| Session Leader Comments | |||
| Feb 24 2010 09:10:32:490AM | 1100224001 | Brian Labombard | 1-LSN, 5.4 tesla, 0.5 MA, NL04~0.95 at RF turn-on ICRF ~2 MW with dropouts neutral pressure is a bit high for ICRF no H-mode? Prad foil ~ 0.8 MW Fixed strike point Thermocouple data ok |
| Feb 24 2010 09:33:19:373AM | 1100224002 | Brian Labombard | 2-LSN, 5.4 tesla, 0.5 MA, NL04~1.0 at RF turn-on ICRF ~2 MW with dropouts neutral pressure is still high two short H-modes Fixed strike point Thermocouple data ok. |
| Feb 24 2010 09:40:36:697AM | 1100224003 | Brian Labombard | 3-LSN, 5.4 tesla, 0.5 MA, NL04~0.9 at RF turn-on ICRF ~2 MW with dropouts neutral pressure is still high Fixed strike point Thermocouple data ok. No LP data on this shot. |
| Feb 24 2010 09:54:29:057AM | 1100224004 | Brian Labombard | 4-LSN, 5.4 tesla, 0.5 MA, NL04~0.5 at RF turn-on ICRF ~3 MW with dropouts from D and E Steady EDA Fixed strike point Thermocouple data ok Two integration times on IR saturates on some frames |
| Feb 24 2010 10:05:05:240AM | 1100224005 | Brian Labombard | 5-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~2 to 3.2 MW with dropouts from D and E Steady EDA, NL04 ~ 1.0 Fixed strike point Appears to be a fresh coating on the tiles; emissivity is up Thermocouple data ok. |
| Feb 24 2010 10:37:22:353AM | 1100224006 | Brian Labombard | 6-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~3.3 MW with a couple of dropouts Steady EDA, NL04 ~ 1.0 Fixed strike point Prad foil ~ 1.7MW Thermocouple data ok |
| Feb 24 2010 11:17:59:170AM | 1100224007 | Brian Labombard | 7-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~3.2 to 2.4 MW with D tripping out Steady EDA, NL04 ~ 1.1 swept strike point - did not go quite far enough Prad foil peaks at ~ 2MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 11:37:54:687AM | 1100224008 | Brian Labombard | 8-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~3.2 to 2.2 MW again with D tripping out Steady EDA, NL04 ~ 1.1 swept strike point - looks good, probe #8 sees full sweep Prad foil peaks at ~ 1.8MW Thermocouple data ok. Analysis jobs did not run automatically on this shot |
| Feb 24 2010 11:49:08:497AM | 1100224009 | Brian Labombard | 9-LSN, 5.4 tesla, 0.5 MA, NL04~0.7 at RF turn-on ICRF ~2.3 MW mostly clean (some trips early and late) Steady EDA, NL04 ~ 1.1 swept strike point Prad foil peaks at ~ 1.5MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 12:24:26:600PM | 1100224010 | Brian Labombard | 10-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on ICRF ~2.3 MW EDAs interrupted by two drop-outs swept strike point Prad foil peaks at ~ 1.3MW prior to first dropout Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 12:26:41:540PM | 1100224011 | Brian Labombard | 11-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on ICRF ~2.4 MW mostly clean (some trips early and late) Steady EDA, NL04 ~ 1.05 swept strike point, probe#8 data look good Prad foil bumps up to ~ 1.7MW Thermocouple data ok. Analysis jobs did not run automatically on this shot |
| Feb 24 2010 01:05:28:913PM | 1100224012 | Brian Labombard | 12-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.3 MW, but trips off (J only) Truncated EDA, then an ohmic EDA swept strike point, beyond probe#8 Prad foil up to ~ 1.7MW then spikes during RF trip leading to H-L Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 02:00:35:883PM | 1100224013 | Brian Labombard | 13-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.4 MW, with some trips Three ELM-free like H-modes swept strike point, beyond probe#8 Prad foil up to ~ 2.3MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 02:00:46:460PM | 1100224014 | Brian Labombard | 14-LSN, 5.4 tesla, 0.8 MA, NL04~1.0 at RF turn-on ICRF ~2.4 MW, with some trips Two H-modes swept strike point, beyond probe#8 Prad foil up to ~ 2.3MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 02:01:11:587PM | 1100224015 | Brian Labombard | 15-LSN, 5.4 tesla, 0.8 MA, NL04~1.0 at RF turn-on ICRF ~2.4 MW Multiple H-modes swept strike point, beyond probe#8 Prad foil up to ~ 2.5MW Thermocouple data ok. Analysis jobs did not run automatically on this shot. |
| Feb 24 2010 02:01:20:540PM | 1100224016 | Brian Labombard | 16-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.0 MW Injections, big one at 0.9 seconds May be on tungsten tile? Three H-modes fixed strike point Prad foil up to ~ 1.9MW on later H-modes Thermocouple data ok. Analysis jobs did not run automatically on this shot |
| Feb 24 2010 02:13:11:927PM | 1100224017 | Brian Labombard | 17-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.0 MW, very clean Steady L-mode, surface temps almost hit 1300 C, nice footprint fixed strike point Prad foil at 0.7MW Thermocouple data ok. Analysis jobs did not run automatically on this shot |
| Feb 24 2010 02:58:20:887PM | 1100224018 | Brian Labombard | 18-LSN, 5.4 tesla, 0.8 MA, NL04~0.95 at RF turn-on ICRF ~2.5 MW, very clean, J+D+E Steady EDA, NL04~1.9 fixed strike point Prad foil peaks at 2.2 MW Thermocouple data ok. LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 02:59:43:450PM | 1100224020 | Brian Labombard | 20-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on SSEP sweep: -1.3 to -0.6 cm ICRF 2 MW,D and E trips Steady EDA,NL04~1.0 fixed strike point Prad foil peaks at 1.4 MW Thermocouple data ok. LP and HF analysis jobs did not run through on this shot. lp_anal_fmp.log: CALL_EXTERNAL: Error loading sharable executable. libg2c.so.0: cannot open shared object file: No such file hf_anal.log: call_bknot.so: wrong ELF class: ELFCLASS32 |
| Feb 24 2010 03:23:12:900PM | 1100224021 | Brian Labombard | 21-LSN, 5.4 tesla, 0.5 MA, NL04~0.55 at RF turn-on SSEP -1.2 to +0.2 cm ICRF 2 MW clean Steady EDA,NL04~1.0, rising density late fixed strike point on lower divertor Prad foil peaks at 1.3 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. Next: sweep SSEP faster |
| Feb 24 2010 03:52:58:980PM | 1100224022 | Brian Labombard | 22-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP -1.2 to +0.2 cm, get there by 1 second ICRF 2 MW, D,E trip at 1.1s Two EDAs,NL04~1.1, fixed strike point on lower divertor Prad foil peaks at 1.5 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 03:53:08:700PM | 1100224023 | Brian Labombard | 23-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP -1.2 to +0.2 cm, get there by 1.1 seconds ICRF 2 MW clean steady EDA,NL04~1.1 fixed strike point on lower divertor Prad foil peaks at 1.5 MW then drops Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 04:18:30:197PM | 1100224025 | Brian Labombard | 25-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP -1.2 to +0.2 cm, get there by 0.85 seconds ICRF 2 MW clean steady EDA,NL04~1.1 IR footprint is weak in this DN discharge. Prad foil peaks at 1.4 MW then drops Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 04:54:42:817PM | 1100224026 | Brian Labombard | 26-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP fixed at -1.2 cm ICRF 2 MW, some trips steady EDA,NL04~1.1 Prad foil peaks at 1.7 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 04:54:54:630PM | 1100224027 | Brian Labombard | 27-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP sweep -1.2 to +0.2 cm arriving at +0.2 at 1.4 s ICRF 2 MW, clean steady EDA,NL04~1.1 Prad foil peaks at 1.7 MW IR did not lock properly - need to do a manual adjust. Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 05:16:48:123PM | 1100224028 | Brian Labombard | 28-LSN, 5.4 tesla, 0.5 MA, NL04~0.6 at RF turn-on SSEP sweep -1.2 to +0.2 cm arriving at +0.2 at 1.4 s ICRF 1 MW, 1 trip two H-modes, first at 1s Prad foil peaks at 0.5 MW in L-mode Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot. |
| Feb 24 2010 05:17:15:360PM | 1100224029 | Brian Labombard | 29-LSN, 5.4 tesla, 0.5 MA, NL04~0.83 at RF turn-on SSEP sweep -1.2 to +0.2 cm arriving at +0.2 at 1.4 s ICRF 1 MW, clean steady L-mode Prad foil peaks at 0.58 MW Thermocouple data ok. IR, LP and HF analysis jobs did not run through on this shot |
| Physics Operator Comments | |||
| Feb 23 2010 05:56:01:660PM | 1100224001 | Steve Wolfe |
Set up for shot#1:
Start from last shot of 1100223030
Seg1: PG4 from 48 to 25msec (no cryo)
Leave RCUR offset at 2000
Leave BR_0 offset at 0.0000
IC_EF4 from -1315 to -1300
Seg2: No changes (Ip=500kA, nl04=0.9e20, ZCUR=-.015).
Note IC_EF4=+2500 is too positive for 500kA, but leave it alone
Note TF_CURRENT=-148000 for 5.4T
Zero NL04 gain before seg switch (no effect),
keep PID=5.547,1.0,5.559
Load at 23-Feb-2010 17:55:23.00
Open tree /home/wolfe/pcs_scratch -1
Open tree done
|
| Feb 24 2010 09:04:32:060AM | 1100224001 | Steve Wolfe | Shot#1: Reload shot already loaded last night, just in case. While I'm at it, import seg2 from 1100223010, which has a strikepoint sweep to be used later, into seg3. Change title of seg2 to 0.5MA. Load at 24-Feb-2010 08:52:34.00 plasma full length, some rf, 2MW from J, D&E faulting out. Target density a little high, closer to 1 than 0.9. No H-mode, which seems surprising at 2MW. Startup looks ok, P0~0.05mTorr, no bounce, no runaways Next: Drop P gain on nl04, increase I and D, drop target a smidge |
| Feb 24 2010 09:21:19:360AM | 1100224002 | Steve Wolfe | Shot#2: Adjust gains on nl04, P from ~5.6 to 3,I from 1 to 2,D from 5.6 to 8; drop target from 9 to 8.5e19. Decrease pg4 from 25 to 23msec plasma, full length, H-modes but not steady, runaways, bouncy startup. Note p0 actually came up from .05 to .055mTorr, BR_0 looks negative Next: raise pg4 back to 25ms, slow down demand on nl04 |
| Feb 24 2010 09:29:06:527AM | 1100224003 | Steve Wolfe | Shot#3: raise pg4 back to 25ms, BR_0 offset from 0 to +.0005 slow down demand on nl04, decrease P gain on nl04 from 3 to 2.0 IGT=2.3e-6 at INIT (was 2e-7 on #1), hope it doesn't choke plasma full length, still bouncing on startup, almost lost it. Density is higher! coming from RF? Next: nl04 to 0.6e20, try to degas. |
| Feb 24 2010 09:45:58:513AM | 1100224004 | Steve Wolfe | Shot#4: nl04 to 0.6e20, try to degas, I gain on Nl04 from 2 to 1 RCUR offset from 2000 to 2500, target at .02 from .63 to .61 plasma full length, still bouncing, more runaways. RF looks better, Steady H-mode, target density came down to 5e19. It either needs more P or more I. Next: NL04 P from 2 to 3, I from 1 to 1.5, target to 0.7e20 |
| Feb 24 2010 10:02:31:440AM | 1100224005 | Steve Wolfe | Shot#5: NL04 P from 2 to 3, I from 1 to 1.5, target to 0.7e20 Leave startup alone for a shot. Actually, it looks like I did not make the change on RCUR at .02sec before shot#4, still at .63 plasma full length, runaways about the same, bounce about the same. Asked for 7e19, got 6.8e19, rf not bad. H-mode ok. Next: ? |
| Feb 24 2010 10:14:40:063AM | 1100224006 | Steve Wolfe | Shot#6: ICEF4 from -1300 to -1290 Otherwise repeat with different rf mix; cleaning up coatings on tiles, which seemed to have increased emissivity overnight. plasma full length, bad runaways but no bounce. RF not bad, H-mode pretty steady (density is flat as a board). Next: strike point sweep |
| Feb 24 2010 10:54:58:127AM | 1100224007 | Steve Wolfe | Shot#7:strike point sweep: extend RXL ramp to .035 at 1.3sec, then flat to 1.5sec, then back down in rampdown, like in 10 from yesterday No startup changes. Delay for magnet temp, and also IGOR is stuck. While I'm waiting, looking at the startup. This one has runaways starting around 50-60msec. OH1_Volt pre-program increases to 250V around then, not sure we need that, especially with s low Ip target. Maybe lower it next shot, if runaways persist. Enter INIT after 22:30 in RECOOL; IGT=1.4e-6 plasma full length, data is slow.No runaways this time. Prad seems to be falling. Run EFIT manually, as it seems to be hung up. TCI came in 5 minutes after shot. Next: Repeat to try to get the RF happier. |
| Feb 24 2010 11:02:00:117AM | 1100224007 | Steve Wolfe | Shot#8:Repeat to try to get the RF happier. Josh is trying to figure out why analysis hung up on shot#7. |
| Feb 24 2010 11:27:13:103AM | 1100224008 | Steve Wolfe | Shot#8:Repeat to try to get the RF happier. Josh is trying to figure out why analysis hung up on shot#7. Actually, run the sweep on RXL to .045 instead of 0.035 at 1.3sec, per SL request. Auto analysis will not go this shot, per Josh. Except some seem to be going plasma full length, no runaways. Some analysis ran, running EFIT manually. Looks like did not get all the power, no rfpow_net yet. RF seems to fault out, down to 2.3MW after 1sec Startup ok, no runways, but there is an early marfe at .09sec Brian says sweep was ok. Next: reduce RF to J only, no DPCS changes |
| Feb 24 2010 11:33:57:573AM | 1100224009 | Steve Wolfe | Shot#9: reduce RF to J only, no DPCS changes May still not get auto-analysis jobs plasma full length, no runaways, no bounce Ran EFIT manually again, flat H-mode, 2+MW clean on RF Next: drop nl04 to .55e20 |
| Feb 24 2010 11:44:16:410AM | 1100224009 | Steve Wolfe | Shot#10: drop nl04 to .55e20, no startup changes Josh is still working on the submit jobs problem. It turns out some init actions also are failing. We will wait a while for him to follow the latest lead. |
| Feb 24 2010 12:16:59:060PM | 1100224011 | Steve Wolfe | Shot#11: repeat for better RF. No DPCS changes I seem not to have been getting entries in since shot#9, This was a repeat of shot#10 which had nl04 set to 5.5e19. Auto analysis jobs still not running. Running EFIT manually Shot looks good, rf ok |
| Feb 24 2010 12:52:53:820PM | 1100224012 | Steve Wolfe | Shot#12: Turn on seg3, which is 800kA, nl04=0.9e20, load gains from seg2. Plasma full length, 800kA, Looks like rf faulted early. Still not getting analysis jobs running efit manually (making sure to do the one in /usr/local/cmod/codes/bin this time. The logfile in /usr/local/cmod/codes/efit/work/ for this shot is empty. I ran the code from efit/work/ so it should have added to the errfil.out in this dir, which is upto to 152MB but seems ok. Next: repeat for RF |
| Feb 24 2010 01:02:37:970PM | 1100224013 | Steve Wolfe | Shot#13: repeat for RF plasma full length, looked like 3 h-modes not very eda-ish. ianflux and vacbrbz ran this time, not sure about efit since I ran it manually. Logfile is there but doesn't seem to be the right size. Didn't seem to run Next: nl04 to 1e20 |
| Feb 24 2010 01:21:18:633PM | 1100224014 | Steve Wolfe | Shot#14: nl04 to 1e20, and slow down the rise No startup changes. plasma full length RF possibly better. Two H-modes. No runaways, startup is getting a little lumpy, not bad enough to tweak. Next: repeat |
| Feb 24 2010 01:31:28:443PM | 1100224015 | Steve Wolfe | Shot#15: repeat for RF No dpcs changes. Moved the efit submit to cmodws57 to see if that helps at all. Other analysis jobs seem to now be running on alcserv4 (?) Breakdpwn was late on 14, see about this time Normal breakdown time, plasma full length, four h-modes this time EFIT ran on its own on cmodws57. For now it's fixed. I can move the fast efit as well for next shot. Next: ??? Waiting for SL instructions |
| Feb 24 2010 01:48:02:070PM | 1100224016 | Steve Wolfe | Shot#16: Import seg4 from seg2 of 1100223016 800ka, 9e19, fixed strikepoint. Adjust density program for slower rise. Load gains from seg2 Remove ramping of RXL between .43 and .80sec Seg3 off, seg4 on plasma full length, multiple h-modes. Big injection at 0.9sec, Maybe in the W row at that time? Next: leave RXL further out for the whole time |
| Feb 24 2010 02:03:48:870PM | 1100224017 | Steve Wolfe | Shot#17:leave RXL further out for the whole time(.0047@.323s,.0068775@0.8sec) plasma full length, only 2MW rf. No H-mode. Brian likes it, but it's the wrong MP. Next: repeat with more power |
| Feb 24 2010 02:16:56:900PM | 1100224018 | Steve Wolfe | Shot#18:repeat with more power plasma full length, steady H-mode RF ran clean at 2.5MW. Should leave nice footprints Next: push our luck? |
| Feb 24 2010 02:35:07:720PM | 1100224019 | Steve Wolfe | Shot#19: import seg2 from seg2 of 1100224006 (fixed strike, 500kA) Change nl04 from 7 to 5.5e19, sweep zcur from .9 to 1.3sec starting at -.015, ending -.005m. Eliminate down sweep on RXL at .433, as on #18 Forgot to change segments! This will still be 800kA, with different RF matching. Dud? EF1L commutated early. Next: load the right segment and try again |
| Feb 24 2010 02:50:51:750PM | 1100224020 | Steve Wolfe | Shot#20: Trying to sweep from LSN to DN before #19: import seg2 from seg2 of 1100224006 (fixed strike, 500kA) Change nl04 from 7 to 5.5e19, sweep zcur from .9 to 1.3sec starting at -.015, ending -.005m. Eliminate down sweep on RXL at .433, as on #18 **** Turn off seg4 and turn on Seg2 this time.*** Load at 24-Feb-2010 14:35:30.00 plasma full length, doesn't go high enough. SSEP only gets to -6mm D faults at 1.05sec, E not happy. Next: move endpoint of zcur sweep to +.005m, lower zxu a little |
| Feb 24 2010 03:06:05:833PM | 1100224021 | Steve Wolfe | Shot#21: Trying to sweep from LSN to DN move endpoint of zcur sweep to +.005m at 1.3sec lower zxu from +.0195 to .01 between .9 and 1.3sec plasma full length, gets to ssep=0+ RF nice and flat, Density rises as it gets to upper-ish, maybe interacting with upper plate? Next: tweak rxu to stay further in, keep upper strike off the leading edge. |
| Feb 24 2010 03:27:38:433PM | 1100224022 | Steve Wolfe | Shot#22: Keep RXU at -.007, instead of moving out to +.001 try to avoid leading edge. Make sweeps in zcur and zxu happen between .9 and 1.0sec. plasma full length, h-mode drops out around 1.1sec Next: Delay the sweep to 1.0sec, keep the step 100msec long |
| Feb 24 2010 03:44:14:923PM | 1100224023 | Steve Wolfe | Shot#23: Delay the sweeps to 1.0sec, keep the step 100msec long (some problem moving the zxu knot at .9 over, deleted it and made a new one??) plasma full length, early marfe and xray burst. Looks like some flakes come in starting around 35msec Stays in H-mode this time, small density increase around 1.1sec, otherwise pretty smooth transit. Next: put it at the upper location for whole RF pulse. |
| Feb 24 2010 03:58:13:313PM | 1100224024 | Steve Wolfe | Shot#24: Start "sweep" at .75sec to .85sec, try to get H-mode first Startup disruption, same time as xray burst on 23. Hits something or something falls in at .038sec, 150kA. Not sure if it's low or outside. Next: tweak startup? |
| Feb 24 2010 04:10:59:280PM | 1100224025 | Steve Wolfe | Shot#25: Rcur at .05sec from .64 to .63m From setup of #24: Start "sweep" at .75sec to .85sec, try to get H-mode first plasma full length, but runaways early, got H-mode ok. Getting a little bump in zcur, which seems to start high. Next: drop br_0 offset from .0005 to 0. Leave ZCUR at -.015 to pick up the lower null case for comparison |
| Feb 24 2010 04:25:43:470PM | 1100224026 | Steve Wolfe | Shot#26: drop br_0 offset from .0005 to 0. Leave ZCUR at -.015,ZXU=+0.02 for whole shot to pick up the lower null case for comparison plasma full length, still some runaways, not as bad, but late breakdown, 8msec. SSEP stays negative, as desired. rf is clean at 2MW. Xrays get started ~.05sec again, no obvious event. Next: BR_0 offset to .0003T Go back to shot#21 (sweep to DN) |
| Feb 24 2010 04:42:28:677PM | 1100224027 | Steve Wolfe | Shot#27: BR_0 offset to .0003T from 0 Import shot#21 seg 2(sweep to DN), delay endpoint to 1.4sec plasma full length, still some runaways, but lower. bd still around 7msec. Prad is a little lower, not as low as on #21 SSEP goes slightly positive at end, as before. Next: Repeat with lower RF power, looking for an L-mode case |
| Feb 24 2010 04:51:18:360PM | 1100224028 | Steve Wolfe | Shot#28: Repeat with lower RF power, looking for an L-mode case No dpcs changes plasma full length, runaways again, couple of H-modes @1sec, 1.24sec TCI lost fringes in rampdown. Next: raise nl04 to .75e20 |
| Feb 24 2010 05:09:00:177PM | 1100224029 | Steve Wolfe | Shot#29: raise nl04 to .75e20, pg4 from 25 to 26msec (beware the fo'cf) plasma full length, still a few runaways, No h-mode (as desired) RF ran clean. That's a keeper. breakdown back to 5.8msec. No bounces, no hesitation, no obvious event that leads to the runaways. I'm still thinking that reducing the OH1 feedforward around 50msec might help; didn't get a chance to do it today, since the runaways stayed away for most of the day. End of Run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:56:36:537AM | Plasma | Ok | |
| 2 | 09:11:10:567AM | Plasma | Ok | |
| 3 | 09:24:48:520AM | Plasma | Ok | |
| 4 | 09:39:21:053AM | Plasma | Ok | |
| 5 | 09:52:20:833AM | Plasma | Ok | |
| 6 | 10:08:43:760AM | Plasma | Ok | EF1 lower low ac phase after shot |
| 7 | 10:35:56:853AM | Plasma | Ok | |
| 8 | 11:13:54:110AM | Plasma | Ok | |
| 9 | 11:28:32:180AM | Plasma | Ok | |
| 10 | 11:48:45:997AM | Plasma | Ok | |
| 11 | 12:02:33:170PM | Plasma | Ok | |
| 12 | 12:40:34:430PM | Plasma | Ok | |
| 13 | 12:54:03:570PM | Plasma | Ok | |
| 14 | 01:07:17:930PM | Plasma | Ok | |
| 15 | 01:22:18:087PM | Plasma | Ok | |
| 16 | 01:41:44:343PM | Plasma | Ok | |
| 17 | 01:57:24:987PM | Plasma | Ok | |
| 18 | 02:12:33:723PM | Plasma | Ok | |
| 19 | 02:31:21:853PM | Plasma | Bad | EF1L commutation problem |
| 20 | 02:44:56:527PM | Plasma | Ok | |
| 21 | 02:58:10:480PM | Plasma | Ok | |
| 22 | 03:22:42:883PM | Plasma | Ok | |
| 23 | 03:35:55:273PM | Plasma | Ok | |
| 24 | 03:49:06:227PM | Plasma | Ok | |
| 25 | 04:02:11:320PM | Plasma | Ok | |
| 26 | 04:15:16:177PM | Plasma | Ok | |
| 27 | 04:32:04:587PM | Plasma | Ok | |
| 28 | 04:45:10:540PM | Plasma | Ok | |
| 29 | 05:00:01:667PM | Plasma | Ok | |
| 30 | 05:34:04:067PM | Test | Ok | |
| 31 | 06:09:29:107PM | Test | Ok | |
| 32 | 06:39:21:577PM | Test | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Feb 24 2010 08:55:58:427AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Feb 24 2010 11:11:11:173AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Feb 24 2010 11:13:18:910AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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