| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yuichi Takase,Yuichi Takase |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Joe Daigle,Frank Silva |
| Engineering Operator Run Comment |
| mp159,133/?156a,161/wolfe/takase/silva/daigle |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:16:337PM |
| Author: To Be Determined |
| Run summary 960828 Part 1: MP 159 RF conditioning MP 133 Post-boronization fiducials (piggyback) and possibly Part 2: MP 156A 1.5MA development or MP 161 Low triangularity SL: Takase PO: Wolfe EO: Silva/Daigle Run Plan: Run target plasmas for RF (both transmitters). Goal is 3MW total and reasonable H-modes (H > 1.5). At some point, try to run a real fiducial. If time permits and the plasmas are reasonably clean and non-disruptive, start trying for 1.5MA. Alternatively, we may go back to Ian's run and finish developing the low triangularity shape for currents to q=3+. Run summary: Overnight He ECDC was performed last night, and the density was kept low, mostly below nel=1.0e20. This was probably the most productive run of the campaign so far. We had a good streak of plasmas (shots 05-19) with lots of H-mode transitions with RF powers a little over 1MW. A limited density scan was done (nel=0.7-1.1e20, target before H-mode), but no obvious improvement was observed at low density. The H concentration was around 10% according to both CX and H_alpha/D_alpha. In the past, deterioration of heating at high concentration (10% is considered high) was observed to be worse at high density (nel=1.1e20), not as bad at low density (nel=0.7e20). Technically, we had difficulty running the two antennas together. This problem has been seen before, but not in H minority heating. This problem needs to be solved to run high-power experiments. The output power from transmitter 1 (D-port antenna) was limited today because of higher-than-normal pressure in the final tube. Plasma position feedback was turned on for the last few shots, and appears to be working correctly. Shot 01 test EF4 test 02 dud 03 dud 04 dud shot got reset to 001 long delay (CAMAC problem) 05 pla* nel=0.8, Ip=0.8MA, BT=5.4T, H-mode @ 1.03s, P_D=0.9MW, P_E=1.5MW 06 pla* nel=0.8, H-mode @ 1.21s, P_D=1.1MW, P_E=1.3MW 07 pla* nel=0.9, H-mode @ 0.93s, P_D=1.2MW, P_E=1.6MW 08 pla* nel=0.9, H-modes, P_D=1.4MW, P_E=1.7MW 09 pla* nel=1.0, H-modes + Mo inj, P_D=1.4MW, disr @ 0.86s nel prog changed to 0.8 for next shot (was 0.9) 10 pla* nel=0.9, H-modes, P_D=1.3MW, P_E=1.7MW 11 pla* nel=0.9, H-modes, P_D=1.2MW, P_E=1.7MW 12 pla* nel=0.9, H-modes, P_D=1.2MW, P_E=1.7MW 13 pla* nel=0.9, H-modes, P_D=1.2MW, P_E=0.5MW (D-port still trips) 14 pla* nel=0.9, H-modes, P_D=1.2MW, P_E=0.5MW (D-port still trips) 15 pla disrupt @ 0.54s, large Mo inj adjusted D-port arc det (MIT) 16 pla* nel=0.8, H-modes, P_D=1.2MW, P_E=0.5MW (both ran together) 17 pla* nel=0.8, H-modes, P_D=0MW (mistuned), P_E=1.5MW 18 pla* nel=1.0, lots of inj, late H-mode, P_D=1.2MW, P_E=1.5MW (d-port trips) 19 pla* nel=0.9, H-modes, P_D=1.2MW, P_E=1.4MW, P_tot=2.4MW 3V offset on pos. FB (got -0.02V) raise nel prog to 0.9 20 dud 21 dud 22 fiz 23 pla* nel=0.9, H-modes, P_D=1.4MW, P_E=1.4MW 2.5V offset on pos. FB (got 0.2V) raise nel prog to 1.0 turn on pos. FB (gain=-2000) 24 dud 25 pla* nel=1.0, H-modes, P_D=1.3MW, P_E=1.3MW adjusted D-port arc det (PPPL) 26 fiz lower nel prog to 0.7 27 dud 28 pla* nel=0.85, late H-mode, P_D=1.2MW, P_E=1.3MW lower nel prog to 0.6 29 pla* nel=0.7, ELM-free H-mode, P_D=1.1MW, P_E=1.3MW raise nel prog to 1.2 30 dud 31 pla* nel=1.1, late H-mode, P_D=1.2MW, P_E=1.4MW |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:56:690PM |
| Author: To Be Determined |
| Physop summary for 960828 MP 159 Rf conditioning Mp 133 POst-boron fiducials SL: Takase PO: wolfe EO: Silva/Daigle Run Plan for 960828 ====================== Run target plasmas for RF (both transmitters) until Yuichi is satisfied or I get bored. Goal is 3MW total and good H-modes. At some point, try to run a real fiducial, for example with segment 2 copied from 960105009; note that gaps should be ok now, since the hybrid offsets seem to be back to "normal". If time permits and the plasmas are reasonably clean and non-disruptive, start trying for 1.5MA. Alternatively, we may go back to Ian's run and finish developing the low triangularity shape for currents to q=3+. The run started badly, but ended up being fairly successful from an operational point of view. Unfortunately, the RF did not get close to the 3MW goal, because they were unsuccessful keeping the two antennas on at once. Background activities included tests of the divertor rga using NINJA puffs after the plasma, and edge thomson was able to see plasma light and stray light, but their alignment changed since the morning, so they were hitting a baffle. Brian conditioned the FSP and got some data. Jim Reardon also tested his new scanning probe into plasma. Also JR reported good rotation results. Fairly good h-modes were obtained on most rf shots with power over 1.3MW or so. The RF feedback was turned on, and seemed to be moving the plasma as expected, but did not help in keeping the RF from faulting. More work is clearly required on the RF side. After a PLC EF4 test, the first plasma attempt was shot 2, which had a number of problems. The EF4 was left in PLC control, so it didn't go. Also, there were numerous CAMAC errors, including magnetics and hybrid outputs, and the TF went to low-taps as soon as it came on, resulting in low field at t=0. Shots 1-4 were attempts to fix the TF; all of them had some level of CAMAC pronlems as well. There was also a paranormal event between the 3rd and 4th shots which caused the current_shot('cmod') to get reset to 960828000, so the 4th shot ended up numbered shot 960828001!. JAS renamed the trees and set the current shot to 4, so subsequent shots were properly numbered. Shot 5, taken just after noon,was a full shot with the TF under PLC control, the first shot of the day with all supplies working properly; it gave us a full length plasma, complete with an h-mode at 1sec. The TF problem with hybrid control was finally understood as operator error: the PLC had been setup with 0V instead of full (1600) voltage. Apparently, the high tap circuit obeys the PLC voltage as a limit, while the low-taps are strictly current demand, so that explained why the supply went to low-tap immediately. PHYSOPS SHOULD BE AWARE OF THIS EFFECT: Under hybrid control, the TF should be set for 1600V and whatever current limit is appropriate. Unfortunately, the CAMAC problems were still present on shot 5, with most of the BP_JK loops affected, among others; as a result the EFIT reconstruction is not trustworthy on this shot. For shot 6, Joe Bosco removed the 4xray crates from the highway, and the CAMAC problems vanished for the rest of the day. After the run, Joe found a 24V supply on one crate with .5V of high frequency noise on it, but couldn't reproduce the failures. The xray crates were left out for the start of tomorrow. Shots 5-19 were all successful startups with the same settings as 960827020, except the pre-puff was increased by 2msec. The startups were all terrible, with lots of spikes and thrashes and very slow Ip and Bz rises. Some of them were below 40kA at 30msec. I didn't even try to tune them up as long as we were getting good plasmas everytime, and it worked for 15 straight shots, until we finally got a dud on shot 20. After shot 20, I started tweaking: EF4 current (more positive by 15a, later put back), RCUR offset, and pre-puff (up and down). I succeeded in getting much nicer startups, with few or no thrashes and Ip to 130kA at 30msec, but these were not nearly as robust as the initial sequence. The main change in these is to raise the RCUR offset in segment 1 by 2000 amp-meters. This has the effect of causing the Bz to ramp up more quickly during the early current rise. At the old level, the Bz ramp was retarded because the feedback seees the plasma as being centered or inside. I believe the startup on shots 5-19 had the plasma starting away from the inner wall and driving out to the limiter, but not quenching, while the later cases started near or on the inner wall and moved in so they snuffed themselves. I also note that the Br seemed to like to be slightly positive, in contrast to previous runs; I never tweaked the Br, although it seemed to drift negative during the day and duds seemed to be more negative than plasmas. Also, see the logbook for a summary of the new resultant coil currents at t=0-, which differ from the ones obtained before yesterday by 100's of amps due to the new offset situation; the currents are now closer to what is drawn. During the course of the day, we changed the outer gap several times and varied the density from .6e20 to 1.2e20 (nl4). There were a few full current disruptions, due to Mo injections, but no halo warnings. See the logbook for blow-by-blow. We never got around to doing the fiducial, which I copied into segment 4. Scorecard: ------------ Tests: 2 duds: 7 (2 due to power supplies) fizzles 2 (1 with 60kA) plasmas 20 ------- ---- total 31 |
| Session Leader Comments | |||
| Aug 28 1996 08:59:13:000AM | Yuichi Takase | Run 960828:
MP 159 RF conditioning MP 133 Post-boronization fiducials (piggyback) and possibly: MP 156A 1.5MA development MP 161 Low triangularity SL: Takase PO: Wolfe EO: Silva and Daigle Overnight He ECDC. Run target plasmas for RF (both transmitters). Goal is 3MW total and reasonable H-modes (H > 1.5). At some point, try to run a real fiducial. If time permits and the plasmas are reasonably clean and non-disruptive, start trying for 1.5MA. Alternatively, we may go back to Ian's run and finish developing the low triangularity shape for currents to q=3+. | |
| Aug 28 1996 09:57:28:540AM | 960828001 | Yuichi Takase | Shot 001: EF4 test
|
| Aug 28 1996 10:08:00:240AM | 960828002 | Yuichi Takase | Shot 002: dud
|
| Aug 28 1996 10:09:10:640AM | 960828003 | Yuichi Takase | Shot 003: dud
|
| Aug 28 1996 12:48:25:060PM | 960828004 | Yuichi Takase | Shot 004: dud
|
| Aug 28 1996 12:49:16:280PM | 960828005 | Yuichi Takase | Shot 005: plasma
nel=0.8, Ip=0.8MA, BT=5.4T, H-mode @ 1.03s, P_D=0.9MW, P_E=1.5MW |
| Aug 28 1996 12:49:32:990PM | 960828006 | Yuichi Takase | Shot 006: plasma
nel=0.8, H-mode @ 1.21s, P_D=1.1MW, P_E=1.3MW |
| Aug 28 1996 12:49:51:960PM | 960828007 | Yuichi Takase | Shot 007: plasma
nel=0.9, H-mode @ 0.93s, P_D=1.2MW, P_E=1.6MW |
| Aug 28 1996 01:12:05:170PM | 960828008 | Yuichi Takase | Shot 008: plasma
nel=0.9, H-modes, P_D=1.4MW, P_E=1.7MW |
| Aug 28 1996 01:12:42:430PM | 960828009 | Yuichi Takase | Shot 009: plasma
nel=1.0, H-modes + Mo inj, P_D=1.4MW, disr @ 0.86s nel prog changed to 0.8 for next shot (was 0.9) |
| Aug 28 1996 01:30:31:000PM | 960828010 | Yuichi Takase | Shot 010: plasma
nel=0.9, H-modes, P_D=1.3MW, P_E=1.7MW |
| Aug 28 1996 01:30:55:310PM | 960828011 | Yuichi Takase | Shot 011: plasma
nel=0.9, H-modes, P_D=1.2MW, P_E=1.7MW |
| Aug 28 1996 02:03:10:140PM | 960828012 | Yuichi Takase | Shot 012: plasma
nel=0.9, H-modes, P_D=1.2MW, P_E=1.7MW |
| Aug 28 1996 02:03:31:610PM | 960828013 | Yuichi Takase | Shot 013: plasma
nel=0.9, H-modes, P_D=1.2MW, P_E=0.5MW (D-port still trips) |
| Aug 28 1996 02:03:44:190PM | 960828014 | Yuichi Takase | Shot 014: plasma
nel=0.9, H-modes, P_D=1.2MW, P_E=0.5MW (D-port still trips) |
| Aug 28 1996 02:14:14:020PM | 960828015 | Yuichi Takase | Shot 015: plasma
disrupt @ 0.54s |
| Aug 28 1996 02:27:20:980PM | 960828016 | Yuichi Takase | Shot 016: plasma
adjusted D-port arc det nel=0.8, H-modes, P_D=1.2MW, P_E=0.5MW (both ran together) |
| Aug 28 1996 03:16:39:510PM | 960828017 | Yuichi Takase | Shot 017: plasma
nel=0.8, H-modes, P_D=0MW (mistuned), P_E=1.5MW |
| Aug 28 1996 03:16:57:870PM | 960828018 | Yuichi Takase | Shot 018: plasma
nel=1.0, lots of inj, late H-mode, P_D=1.2MW, P_E=1.5MW (d-port trips) |
| Aug 28 1996 03:17:18:760PM | 960828019 | Yuichi Takase | Shot 019: plasma
nel=0.9, H-modes, P_D=1.2MW, P_E=1.4MW, P_tot=2.4MW |
| Aug 28 1996 03:17:56:230PM | 960828020 | Yuichi Takase | Shot 020: dud
raised nel prog to 0.9 |
| Aug 28 1996 03:18:20:480PM | 960828021 | Yuichi Takase | Shot 021: dud
|
| Aug 28 1996 03:28:29:430PM | 960828022 | Yuichi Takase | Shot 022: fizzle
|
| Aug 28 1996 03:52:54:000PM | 960828023 | Yuichi Takase | Shot 023: plasma
nel=0.9, H-modes, P_D=1.4MW, P_E=1.4MW 2.5V offset on pos. FB (got 0.2V) raise nel prog to 1.0 turn on pos. FB (gain=-2000) |
| Aug 28 1996 03:53:22:190PM | 960828024 | Yuichi Takase | Shot 024: dud
|
| Aug 28 1996 04:14:11:000PM | 960828025 | Yuichi Takase | Shot 025: plasma
nel=1.0, H-modes, P_D=1.3MW, P_E=1.3MW |
| Aug 28 1996 04:14:26:530PM | 960828026 | Yuichi Takase | Shot 026: fizzle
|
| Aug 28 1996 04:55:50:470PM | 960828027 | Yuichi Takase | Shot 027: dud
|
| Aug 28 1996 04:56:16:600PM | 960828028 | Yuichi Takase | Shot 028: plasma
nel=0.85, late H-mode, P_D=1.2MW, P_E=1.3MW lower nel prog to 0.6 |
| Aug 28 1996 04:56:37:590PM | 960828029 | Yuichi Takase | Shot 029: plasma
nel=0.7, ELM-free H-mode, P_D=1.1MW, P_E=1.3MW raise nel prog to 1.2 |
| Aug 28 1996 04:57:00:580PM | 960828030 | Yuichi Takase | Shot 030: dud
|
| Aug 28 1996 06:38:38:300PM | 960828031 | Yuichi Takase | Shot 031: plasma
raised nel prog to 1.2 nel=1.1, late H-mode, P_D=1.2MW, P_E=1.4MW |
| Physics Operator Comments | |||
| Aug 28 1996 07:34:03:910AM | Steve Wolfe | Run Plan for 960828
====================== MP 159 RF conditioning MP 133 Post-boronization fiducials (piggyback) and possibly: MP 156A 1.5MA development MP 161 Low triangularity SL: Takase PO: Wolfe EO: Silva and Daigle Engineering setup ------------------- ECDC Overnight in Helium ower systems setup as for 960827020; note: hybrid control on TF. Gas setup = standard A-side 20psi D2 B-top 5psi D2 B-side Lower 4psi Ar Enable all for first shot (hybrid) | |
| Aug 28 1996 07:35:05:610AM | Steve Wolfe | Run plan
-------- Start from PCS as on last shot 960827020, except for some tweaks to offsets and perhaps some currents to compensate for the change in the hybrid A-out offsets after shot 960827014. Note that the outer gap was small on shot 20. Run target plasmas for RF (both transmitters) until Yuichi is satisfied or I get bored. Goal is 3MW total and good H-modes. At some point, try to run a real fiducial, for example with segment 2 copied from 960105009; note that gaps should be ok now, since the hybrid offsets seem to be back to "normal". If time permits and the plasmas are reasonably clean and non-disruptive, start trying for 1.5MA. Alternatively, we may go back to Ian's run and finish developing the low triangularity shape for currents to q=3+. | |
| Aug 28 1996 07:46:56:930AM | Steve Wolfe | Start from 960827020:
Startup looks marginal, late breakdown and lots of thrashing. Null looks like negative Br and Bz. Comparison of coil currents from 960827020 and 960827014 @t=0- Coil 020 014 change ---- --- ---- ------- OH1 -20591 -20146 455 OH2U -27486 -27278 208 OH2L -26511 -26065 446 EF1U -6141 -6006 135 EF1L -6189 -6102 87 EF2U -2210 -2119 91 EF2L -2114 -2109 5 EF3 EF4 -1376 -1362 * Drawn value different by 50amps | |
| Aug 28 1996 08:11:33:200AM | Steve Wolfe | PCS changes for shot 1:
Load_from 960827020 Import_seg 4 from 960105009 seg 2 ( fiducial) In seg 2: Change RCUR offset 4000->8000 Change title to "lower x-pt" Move drop in IC_EF4 gain back to .49 from .248 In seq 1: Increase pre-puff to 16msec (from 14). Load_into_model coldstart: ok | |
| Aug 28 1996 09:52:35:310AM | 960828002 | Steve Wolfe | 960828002: Try for everything.
PCS changes for shot 1: ------------------------- Load_from 960827020 Import_seg 4 from 960105009 seg 2 ( fiducial) In seg 2: Change RCUR offset 4000->8000 Change title to "lower x-pt" Move drop in IC_EF4 gain back to .49 from .248 In seg 1: Increase pre-puff to 16msec (from 14). Result: dud = no ef4, ef3 looks strange, comes on and off and on again. ef3 is due to hybrid command, probably rcur. tf is low at t=0. |
| Aug 28 1996 10:27:04:910AM | 960828003 | Steve Wolfe | 960828003: Try for everything again.
Among the other problems, on shots 1&2 we had traq failures. Joe Bosco found crates with power supply crowbarred, power cycled and they came back Boris &Co will try firing div. thomson laser at .3 sec dud. tf still on low taps. problems on magnetics camac All traqs and auroras say not triggered Try a test shot and it seems to work |
| Aug 28 1996 11:56:39:080AM | 960828003 | Steve Wolfe | 960828004: TF plc test.
Somehow this became shot 1 again. TF seemed to work. Magnetics mds error reading \mag_bp_coils.signals:bp12_jk and 18 and 17. Lots of work onm both TF and camac, not clear anything fixed. Main change on camac, other than power cycling, is swapping order of xray and magnetics crates. Supposedly, jas has renamed the trees to shot 4. |
| Aug 28 1996 12:06:54:510PM | 960828005 | Steve Wolfe | 960828005: Try plasma again with TF under PLC control.
Full plasma. H-mode at 1sec, Some camac errors:same bp loops. lots of hybrid outputs Serious hesitation on current rise. Big left gap, right gap = 1.2cm |
| Aug 28 1996 12:32:29:070PM | 960828006 | Steve Wolfe | 960828006: Actually, on last shot, all bpjk's except 19-26
seem to be missing. I don't know if I can trust the EFIT or not. They've figured out what the TF problem was: Frank had the voltage limit set to zero instead of 1600V. This all makes sense (according to Daigle and Cochrane). However, Daigle is afraid they have gronked something poking around in the supply, so stay with PLC TF for now. Joe Bosco has removed the XRAY crate from the hiway. We'll just do a repeat and see what we get. Plasma. full length, h-mode. Getting the JK bp loops now Looks like all camac worked this time. EFIT says gaps are 1.9, 1.4 (in/o) |
| Aug 28 1996 12:40:00:060PM | 960828007 | Steve Wolfe | 960828007: repeat.
plasma - full length, good h-mode. Still only getting 1.5MW in, from each separately. |
| Aug 28 1996 12:54:34:000PM | 960828008 | Steve Wolfe | 960828008: repeat. breakdown is getting ratty, but lets wait for it to
lose it before I tweak. Brian is launching his probe this shot. X-ray crates are still out. Plasma again. I won't touch it till it fails. Small injection around .735 may have tripped rf, caused brief vertical problem, but it survived. |
| Aug 28 1996 01:05:38:340PM | 960828009 | Steve Wolfe | 960828009: repeat.
disruption at .82sec looks like a moly injection |
| Aug 28 1996 01:14:50:400PM | 960828010 | Steve Wolfe | 960828010: decrease density to .8e20 (target).
plasma, full length, h-modes |
| Aug 28 1996 01:33:46:400PM | 960828011 | Steve Wolfe | 960828011: repeat except for 4msec less Ar.
plasma - lots of h-modes. |
| Aug 28 1996 01:34:02:520PM | 960828012 | Steve Wolfe | 960828012: repeat
plasma - lots of h-modes. |
| Aug 28 1996 01:51:51:910PM | 960828013 | Steve Wolfe | 960828013: repeat
plasma - h-modes. |
| Aug 28 1996 01:52:16:690PM | 960828014 | Steve Wolfe | 960828014: repeat
plasma - h-modes |
| Aug 28 1996 02:02:50:110PM | 960828014 | Steve Wolfe | 960828014: repeat
plasma - h-modes efit failed. trying to re-run it. |
| Aug 28 1996 02:11:52:850PM | 960828015 | Steve Wolfe | 960828015: repeat
early disruption. .47 sec. Moly injection. |
| Aug 28 1996 02:20:37:040PM | 960828016 | Steve Wolfe | 960828016: move rcur out by 2mm (.667 -> .669) to reduce gap for RF
loaded it twice - pay attention wolfe! plasma - h-modes. RF staying on better together. Goetz requests more Ar for next shot. |
| Aug 28 1996 02:31:32:240PM | 960828017 | Steve Wolfe | 960828017: Ar back to 44msec. No other changes.
plasma - h-modes. |
| Aug 28 1996 02:44:46:770PM | 960828018 | Steve Wolfe | 960828018: Another mm on rcur ->.670
plasma - h-modes lots of Mo injections. outer gap is a little smaller, down to .9 to 1.0cm RF still not real happy. |
| Aug 28 1996 02:58:16:990PM | 960828019 | Steve Wolfe | 960828019: Yuichi is turning on the RF load input. No gain on it for
this shot. No changes from my end. BLIP is having the NINJA plenum pumped out, preparatory to puffing some neon. plasma- lots of h-modes I see a signal of about -.02V on RF_load signal. Yuichi says this is the floor value for pushing the plasma away. efit and RF power calc both bombed out? running efit manually. |
| Aug 28 1996 03:10:14:280PM | 960828020 | Steve Wolfe | 960828020: nl4 back to .9e20
dud . Oh well, it was nice while ot lasted. |
| Aug 28 1996 03:18:51:740PM | 960828021 | Steve Wolfe | 960828021: nl4 back to .9e20
EF4 15amps more positive (to -1360) another dud. It's gone! |
| Aug 28 1996 03:30:19:810PM | 960828022 | Steve Wolfe | 960828022: nl4 back to .9e20
Raise puff to 18msec. Rcur offset from 7000 -> 8000 fizzle - 40kA moving outside. |
| Aug 28 1996 03:43:36:790PM | 960828023 | Steve Wolfe | 960828023: nl4 back to .9e20
rcur offset to 9000. bd is still late, but current rise looks good. 125kA at 30msec Plasma - h-modes, rfload_e signal is around +.2V. |
| Aug 28 1996 03:55:40:510PM | 960828024 | Steve Wolfe | 960828024: RCUR seg 2 add RFload gain at -2000.
nl04 to 1.0e20 dud again. still not good startup. |
| Aug 28 1996 04:06:52:030PM | 960828025 | Steve Wolfe | 960828025: EF4 back to -1375.
RCUR seg 2 add RFload gain at -2000. nl04 to 1.0e20 plasma - hmodes. breakdown back at 5.9msec, strong current rise, but is it robust? one or two short thrashes around 11msec |
| Aug 28 1996 04:14:49:940PM | 960828026 | Steve Wolfe | 960828026: nl04 to 0.7e20
fizzle. hardly any current. bd at 6.5msec br actually looks more negative this time? bz rising much more quickly. |
| Aug 28 1996 04:22:42:260PM | 960828027 | Steve Wolfe | 960828027: nl04 to 0.7e20
pre-puff down to 17msec dud. does it want more gas? Br? what? |
| Aug 28 1996 04:33:36:060PM | 960828028 | Steve Wolfe | 960828028: nl04 to 0.7e20
pre-puff up to 19msec plasma- late h-mode. density still came out at .85 late bd 7.5msec rf only has small overlap. |
| Aug 28 1996 04:42:50:530PM | 960828029 | Steve Wolfe | 960828029: nl04 to 0.6e20, reduce pg3 voltage to 10 after .5sec
Neon puff at 2sec for div. rga response plasma. 2h-modes. got about .75e20 for density. valve is off after .5sec still only small overlap on rf's |
| Aug 28 1996 04:54:36:030PM | 960828030 | Steve Wolfe | 960828030: nl04 to 1.2e20, raise pg3 voltage back to 35.
Neon puff at 2sec for div. rga response dud. |
| Aug 28 1996 05:18:33:020PM | 960828031 | Steve Wolfe | 960828031: No changes!
nl04 to 1.2e20, raise pg3 voltage back to 35. Neon puff at 2sec for div. rga response plasma-1.1e20, 1h-mode rf still not getting it together. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:55:42:850AM | Test | Ok | ef4 test no faults |
| 2 | 09:42:03:650AM | Test | Ok | |
| 3 | 10:04:51:310AM | Plasma | Ok | tf high-low tap switching problem |
| 4 | 11:04:51:310AM | Plasma | Ok | |
| 5 | 11:56:59:480AM | Plasma | Ok | no faults |
| 6 | 12:18:37:920PM | Plasma | Ok | no faults |
| 7 | 12:33:37:420PM | Plasma | Ok | no faults |
| 8 | 12:43:16:280PM | Plasma | Ok | no faults |
| 9 | 12:54:51:970PM | Plasma | Ok | no faults |
| 10 | 01:08:03:960PM | Plasma | Ok | no faults |
| 11 | 01:21:13:510PM | Plasma | Ok | no faults |
| 12 | 01:30:35:330PM | Plasma | Ok | no faults |
| 13 | 01:40:41:280PM | Plasma | Ok | no faults |
| 14 | 01:50:48:380PM | Plasma | Ok | no faults |
| 15 | 02:03:23:520PM | Plasma | Ok | no faults |
| 16 | 02:16:03:940PM | Plasma | Ok | |
| 17 | 02:26:24:860PM | Plasma | Ok | |
| 18 | 02:37:47:290PM | Plasma | Ok | |
| 19 | 02:49:44:860PM | Plasma | Ok | |
| 20 | 03:02:48:340PM | Plasma | Ok | |
| 21 | 03:16:06:890PM | Plasma | Ok | |
| 22 | 03:24:28:470PM | Plasma | Ok | |
| 23 | 03:35:14:430PM | Plasma | Ok | |
| 24 | 03:49:01:040PM | Plasma | Ok | |
| 25 | 03:58:17:420PM | Plasma | Ok | |
| 26 | 04:09:30:900PM | Plasma | Ok | |
| 27 | 04:18:14:760PM | Plasma | Ok | |
| 28 | 04:25:54:870PM | Plasma | Ok | |
| 29 | 04:37:58:440PM | Plasma | Ok | |
| 30 | 04:49:41:260PM | Plasma | Ok | |
| 31 | 05:00:00:700PM | Plasma | Ok | |