| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Byford,Ed Fitzgerald |
| Engineering Operator Run Comment |
| MP#311 Spatial Dependence of Edge Turbulence Statistics; SL: LaBombard ; |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:32:430PM |
| Author: To Be Determined |
| Run Summary for 1030522 - MP#311 "Spatial Dependence of Edge Turbulence Statistics" Session Leader: B. LaBombard Physics Operator: S. Wolfe MP Objectives: The primary purpose of these experiments is to explore the radial and poloidal variation in the statistics of edge plasma fluctuations. ________________________________________________________________________________ Run Plan: All shots: Ip=0.8 MA, Bt=5.3 tesla, lower x-point equilibrium. Inner and outer gaps at 1.5 cm. (inner gap will be tweaked for ISP operation) Start from Shot#1030516005 Analysis of the few shots we got last time (Ben Carreras) indicates that the fluctuation statistics change dramatically in the Near SOL (rho = 2 mm) vs Far SOL (rho = 7 mm) So we need to refocus the run plan towards mapping out this variation with rho. The run plan therefore calls for repeating 5 shots at fixed conditions and stepping through a coarse density scan. It will be a boring run from the physics operator's point of view. Shots Set up discharge and probe targeting 1,2,3 NL04 = 1.0 Run ASP in fixed position mode, increasing its insertion depth in each shot and determining its maximum insertion depth that avoids overheating. We need to get ASP into 'Near' SOL. This is range where 40 < Te < 50 eV. Run ISP, determining coil pulse-length for optimized probe insertion depth (deepest without damage). All non-flush divertor probes will operate in sweep mode; middle flush probes in the outer divertor triplet will operate in 'grounded' mode; end flush probes in the outer divertor triplet will operate in a 'floating' mode. Fast digitizers will be set up to record floating potential fluctuations on these divertor probes. Check strike-point and rho-mappings. Outer divertor strike point should be between probes 1 and 6. Then do five identical shots at each density, with different probe setups: Setup: "Scan" - ASP & FSP Scanning three times (swept E/W, floating N/S probes) 128k data samples, 1MHz. ISP in swept voltage mode. Setup: "8mm" - ASP in fixed position mode, rho=8 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Isat mode. Setup: "6mm" - ASP in fixed position mode, rho=6 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Isat mode. Setup: "4mm" - ASP in fixed position mode, rho=4 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Vf mode. Setup: "2mm" - ASP in fixed position mode, rho=2 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Vf mode. 4, 5, 6, 8, 9 NL04 = 1.0 10,11,12,13,14 NL04 = 0.8 15,16,17,18,19 NL04 = 0.6 20,21,22,23,24 NL04 = 1.2 25,26,27,28,29 NL04 = 1.4 ________________________________________________________________________________ Results: We made good progress on getting long time sample data (0.5 Msamples from each electrode at 1 MHz) from the A-port scanning probe at a variety of locations in the SOL. We were not able to run all the planned densities. Instead, we ran NL04 = 1.1, .9, 0.6e20 and focused on getting data at a number of radial locations with the ASP. The ASP performed well (moly probe head - the ATJ graphite one had some carbon buildup problems on the electrodes) but we did not push it hard. In fact, when the probe started to show some evidence of overheating, the bias arrangement was switched to all electrodes (N,S,E,W) floating. As a result, we did not get Isat time samples for some of the near SOL locations at high densities. The F-port probe performed well. It was operated in the usual scan mode for all shots, regularly touching the separatrix. The ISP also performed well. We operated it in alternating bias modes of sweep, Isat, Vf and got it to regularly poke near the separatrix. The algorithm that computes the radial location of the ISP clearly needs work. The effective area of the coil and the starting angle needs to be more carefully modeled. (Presently, the code is trying to compute ASIN of arguments greater than 1.) A model for the projected area of the probe also needs to be assembled. Data from the ASP and ISP today should allow us to look for differences in the inner/outer fluctuation levels as a function of density. Detailed Shot Log (focusing on ASP setup/results): NL04=1.1e20 1 ISP only 2 ASP Scan 2mm 3 no plasma 4 ASP Scan 0mm 5 ASP dwell Isat/Vf 6mm - clean data 6 ASP dwell Isat/Vf 4mm - clean data 7 ASP dwell Isat/Vf 2.8mm - overheat, trends 8 ASP dwell all Vf 2mm - overheat, trends 9 ASP scan -2 mm - all probes ok 10 no plasma 11 ASP dwell all Vf 2.6mm - clean data 12 ASO dwell all Vf 3.2mm - clean data NL04=.92e20 13 ASP dwell Isat/Vf 6.5mm - clean data NL04=.85e20 14 ASP dwell Isat/Vf 5mm - clean data 15 ASP dwell Isat/Vf 2.8mm - clean data 16 disrupted at .5 s 17 ASP dwell all Vf 1.4 mm - overheat, trends 18 ASP dwell all Vf 3.5 mm - clean 19 ASP scan 0 mm - all probes ok NL04=.6e20 20 ASP dwell Isat/Vf 5.5mm - clean data 21 ASP dwell Isat/Vf 3.8 mm - clean data 22 ASP dwell Isat/Vf 4mm - clean data 23 no plasma 24 no plasma 25 ASP dwell Isat/Vf 2.8 mm - clean data, some trend 26 ASP dwell Isat/Vf 8 mm - clean data 27 ASP Scan 0 mm - ok data 28 no plasma NL04= 1.3e20 29 ASP dwell all Vf 4 mm - clean data |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:17:973PM |
| Author: To Be Determined |
| Physics Operator Summary for Thurs. May 22, 2003 MP#311 Spatial Dependence of Edge Turbulence Statistics SL: LaBombard PO: wolfe EO: Fitzgerald,Byford Engineering Setup ----------------- Overnight ECDC in D2 at 2e-4, bake at 60C Power Systems as on 1030516005 (no need to change C-coil taps) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV Run Plan -------- All shots: Ip=0.8 MA, Bt=5.3 tesla, lower x-point equilibrium. Inner and outer gaps at 1.5 cm. (inner gap will be tweaked for ISP operation) Load from 1030516005, change nl04 to 1e20, adjust pg3 pulse, decrease CLEARIN by .002, and decrease RCUR by .004 to get gaps to 1.5cm each Details of probe settings are in session leader's summary. The main thing physop has to do is change the density as follows: 4, 5, 6, 8, 9 NL04 = 1.0 10,11,12,13,14 NL04 = 0.8 15,16,17,18,19 NL04 = 0.6 20,21,22,23,24 NL04 = 1.2 25,26,27,28,29 NL04 = 1.4 Results ------- We completed the first three densities and one shot at nl04=1.3e20. A satisfactory equilibrium was established by shot#2 and slightly tweaked for shot 11; the same equilibrium settings were used from then on. At the 6e19 point, we encountered locked modes (shots #20 and 21), which were suppressed using the Acoil (full current, +Dtop -Dbot -Jtop +Jbot); in the interest of keeping the main experiment on track, we did not try to find the suppression threshold. Earl and Brock shot pellets at end of flattop and in rampdown on a lot of shots; some of these disrupted, but this did not seem to have terrible effects on the startup of the subsequent shots. They seemed to be getting good data. Shot#16 disrupted at 0.5sec from an injection of unknown origin; shot#1 had a similar injection that took a bite out of the current but was not fatal. I tuned the startup mostly with PG4, increasing it to avoid bouncers and runaways, and decreasing to avoid inner-wall snuffs. I also changed IC_EF4 from -1320 to -1300A on shot#15 to try to eliminate a bounce, and left it there for the rest of the run. Shot #10 was a dud due to a gas failure and Shot#23 fizzled(!) for lack of EF3; neither failure was explained, and on the subsequent shots all systems ran correctly. There were no data system hangs all day. On one or two shots the H/D signal did not come through, presumably due to CAMAC problems. Scorecard ---------- Tests 0 Duds 1 Fizzles 3 Plasmas 25 (one 0.5sec disruption) ======= == Shots 29 |
| Session Leader Comments | |||
| May 22 2003 09:36:08:467AM | 1030522001 | Brian Labombard | Shot 1 - ISP scanning at .7, .95, 1.2 seconds in far SOL ASP, FSP not scanning Next shot: remove drift in outer gap, move lower x-point to smaller R scan probes |
| May 22 2003 10:06:21:710AM | 1030522002 | Brian Labombard | Shot 2 - ASP, FSP, ISP scanning at .7, .95, 1.2 probes data look ok, targets are excellent, probes need to move in Next shot: scan all probes deeper |
| May 22 2003 10:36:36:300AM | 1030522004 | Brian Labombard | Shot 4 - ASP, FSP, ISP scanning at .7, .95, 1.2 EFIT separatrix looks accurate Next shot: got to dwell-scan ASP at 8 mm |
| May 22 2003 10:48:38:897AM | 1030522005 | Brian Labombard | Shot 5 - ASP in dwell mode, 8 mm FSP, ISP scanning a 0.8, 1.05, and 1.3 s FSP in sweep mode, ISP in Isat mode Next shot, go to 6 mm on ASP |
| May 22 2003 10:56:45:013AM | 1030522006 | Brian Labombard | Shot 6 - ASP in dwell mode, 6 mm FSP, ISP scanning a 0.8, 1.05, and 1.3 s FSP in sweep mode, ISP in Isat mode Next shot, go to 4 mm on ASP |
| May 22 2003 11:21:29:830AM | 1030522007 | Brian Labombard | Shot 7 - ASP in dwell mode, 4 mm FSP, ISP scanning a 0.8, 1.05, and 1.3 s FSP in sweep mode, ISP in Vf mode West probe on ISP is arcing - need to repeat this shot. Next shot, stay at 4 mm on ASP with all probes floating |
| May 22 2003 11:36:04:670AM | 1030522008 | Brian Labombard | Shot 8 - ASP in dwell mode, 4 mm FSP, ISP scanning a 0.8, 1.05, and 1.3 s FSP in sweep mode, ISP in Vf mode all ASP probes are floating - still see a slow trend on north and south probe data - why? Next shot go back to scan mode on ASP |
| May 22 2003 12:01:52:233PM | 1030522009 | Brian Labombard | Shot 9 - ASP scanning at .8, 1.05 and 1.3 s FSP, ISP scanning a 0.8, 1.05, and 1.3 s ASP, FSP, ISP in sweep mode ASP is fine. Next shot: go to dwell mode on ASP also try to get larger gap prior to 0.6 seconds |
| May 22 2003 12:10:44:287PM | 1030522010 | Brian Labombard | Shot 10 - no plasma Nest shot: try again with ASP in dwell and all probes floating |
| May 22 2003 12:34:12:353PM | 1030522011 | Brian Labombard | Shot 11 - ASP in dwell mode, all probes floating FSP, ISP scanning a 0.8, 1.05, and 1.3 s it looks like the probe is really at 2.5 mm location Next shot: repeat with ASP 1 mm further out |
| May 22 2003 12:45:44:107PM | 1030522012 | Brian Labombard | Shot 12 - ASP in dwell mode, all probes floating FSP, ISP scanning a 0.8, 1.05, and 1.3 s ASP data is clean Next shot: go to NL04=0.8 with ASP at 8mm location |
| May 22 2003 01:00:11:923PM | 1030522013 | Brian Labombard | Shot 13 - ASP in dwell mode, 8mm location FSP, ISP scanning a 0.8, 1.05, and 1.3 s FSP-sweep, ISP-Isat Next shot: ASP at 6mm location |
| May 22 2003 01:12:37:147PM | 1030522014 | Brian Labombard | Shot 14 - ASP in dwell mode, 6mm location FSP, ISP scanning a 0.8, 1.05, and 1.3 s FSP-sweep, ISP-Isat Next shot: ASP at 4mm location, also drop first scans on FSP and ISP |
| May 22 2003 01:28:02:950PM | 1030522015 | Brian Labombard | Shot 15- ASP in dwell mode, 4mm location FSP, ISP scanning a 1.05, and 1.3 s FSP-sweep, ISP-Vf Next shot: ASP at 2mm location |
| May 22 2003 01:42:28:720PM | 1030522016 | Brian Labombard | Shot 16- disrupted try again, with all ASP probes in Vf mode |
| May 22 2003 02:04:36:873PM | 1030522017 | Brian Labombard | Shot 17- ASP in dwell mode, 2mm location, all probes floating FSP, ISP scanning a 1.05, and 1.3 s FSP-sweep, ISP-Vf => too deep for ASP, need to back off Next shot: ASP 2 mm further out |
| May 22 2003 02:12:15:087PM | 1030522018 | Brian Labombard | Shot 18- ASP in dwell mode, 2+mm location, all probes floating FSP, ISP scanning a 1.05, and 1.3 s FSP-sweep, ISP-Vf good data Next shot: ASP scanning |
| May 22 2003 02:25:37:183PM | 1030522019 | Brian Labombard | Shot 19- ASP in sweep mode, .8, 1.05, 1.3 s FSP, ISP scanning a 1.05, and 1.3 s FSP and ISP -sweep Next shot: ASP at 8mm, NL04=0.6 |
| May 22 2003 02:41:09:267PM | 1030522020 | Brian Labombard | Shot 20- ASP dwelling at 8 mm FSP scanning at 1.05, and 1.3 s - sweep mode ISP scanning at 1.05 - isat mode Clean data Next shot: ASP at 6mm |
| May 22 2003 02:56:37:787PM | 1030522021 | Brian Labombard | Shot 21- ASP dwelling at 6 mm FSP scanning at 1.05, and 1.3 s - sweep mode ISP scanning at 0.8, 1.05, 1.3 s - isat mode Next shot: ASP at 4mm |
| May 22 2003 03:33:41:943PM | 1030522022 | Brian Labombard | Shot 22- ASP dwelling at 4 mm FSP scanning at 0.8, 1.05, and 1.3 s - sweep mode ISP scanning at 0.8, 1.05, 1.3 s - vf mode Next shot: ASP at 2mm |
| May 22 2003 04:12:08:917PM | 1030522025 | Brian Labombard | Shot 25- ASP dwelling at 2 mm FSP scanning at 0.8, 1.05, and 1.3 s - sweep mode ISP scanning at 0.8, 1.05, 1.3 s - Vf mode Next shot: ASP at 8+ mm |
| May 22 2003 04:21:49:750PM | 1030522026 | Brian Labombard | Shot 26- ASP dwelling at 8+ mm FSP scanning at 0.8, 1.05, and 1.3 s - sweep mode ISP scanning at 0.8, 1.05, 1.3 s - Isat mode Next shot: Scan ASP to sep. |
| May 22 2003 04:33:34:430PM | 1030522027 | Brian Labombard | Shot 27- ASP scanning at 0.8, 1.05, and 1.3 s - sweep mode FSP scanning at 0.8, 1.05, and 1.3 s - sweep mode ISP scanning at 0.8, 1.05, 1.3 s - sweep mode Next shot: Go to NL04=1.3 with ASP dwelling at 4mm |
| May 22 2003 04:43:23:940PM | 1030522028 | Brian Labombard | Shot 28- no plasma Next shot: try again, ASP at 4 mm with all probes in Vf mode |
| Physics Operator Comments | |||
| May 22 2003 07:15:43:253AM | Steve Wolfe | Engineering Setup and Run Plan for Thurs. 5/22/2003 MP#311 "Spatial Dependence of Edge Turbulence Statistics" SL: LaBombard PO: wolfe Overnight ECDC in D2 at 2e-4, bake at 60C Power Systems as on 1030516005 (no need to change C-coil taps) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV Run Plan -------- All shots: Ip=0.8 MA, Bt=5.3 tesla, lower x-point equilibrium. Inner and outer gaps at 1.5 cm. (inner gap will be tweaked for ISP operation) Load from 1030516005, change nl04 to 1e20, adjust pg3 pulse, decrease CLEARIN by .002, and decrease RCUR by .004 to get gaps to 1.5cm each Analysis of the few shots we got last time (Ben Carreras) indicates that the fluctuation statistics change dramatically in the Near SOL (rho = 2 mm) vs Far SOL (rho = 7 mm) So we need to refocus the run plan towards mapping out this variation with rho. The run plan therefore calls for repeating 5 shots at fixed conditions and stepping through a coarse density scan. It will be a boring run from the physics operator's point of view. Shots Set up discharge and probe targeting 1,2,3 NL04 = 1.0 Run ASP in fixed position mode, increasing its insertion depth in each shot and determining its maximum insertion depth that avoids overheating. We need to get ASP into 'Near' SOL. This is range where 40 < Te < 50 eV. Run ISP, determining coil pulse-length for optimized probe insertion depth (deepest without damage). All non-flush divertor probes will operate in sweep mode; middle flush probes in the outer divertor triplet will operate in 'grounded' mode; end flush probes in the outer divertor triplet will operate in a 'floating' mode. Fast digitizers will be set up to record floating potential fluctuations on these divertor probes. Check strike-point and rho-mappings. Outer divertor strike point should be between probes 1 and 6. Then do five identical shots at each density, with different probe setups: Setup: "Scan" - ASP & FSP Scanning three times (swept E/W, floating N/S probes) 128k data samples, 1MHz. ISP in swept voltage mode. Setup: "8mm" - ASP in fixed position mode, rho=8 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Isat mode. Setup: "6mm" - ASP in fixed position mode, rho=6 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Isat mode. Setup: "4mm" - ASP in fixed position mode, rho=4 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Vf mode. Setup: "2mm" - ASP in fixed position mode, rho=2 mm, 512k data samples, 1MHz, with continuous Isat mode on E/W and Vf mode on N/S probes. FSP scanning three times (swept E/W, floating N/S probes) ISP in Vf mode. 4, 5, 6, 8, 9 NL04 = 1.0 10,11,12,13,14 NL04 = 0.8 15,16,17,18,19 NL04 = 0.6 20,21,22,23,24 NL04 = 1.2 25,26,27,28,29 NL04 = 1.4 | |
| May 22 2003 07:27:28:177AM | Steve Wolfe | Setting up for 10305222 LoadFrom 1030516005 change nl04 to 1e20, flat to 1.5sec clearin down by .002 beginning at .691sec rcur down by .004 to .660 from .374sec Load at 22-May-2003 07:27:15.00 | |
| May 22 2003 09:32:52:703AM | 1030522001 | Steve Wolfe | shot#1: Tweaked density and gaps from 1030516005; no changes to startup (br0=.0005,ef4=-1320) plasma full length but some kind of injection takes a bite at 0.5sec. seems to happen when it comes out of the slot next shot: Rcur put a point at 0.7 to .659, 1.5 to .661 to adjust outer gap rxl from .011 to 0 at .605 and after, but out to .01 earlier |
| May 22 2003 09:43:47:567AM | 1030522002 | Steve Wolfe | shot#2: Rcur put a point at 0.7 to .659, 1.5 to .661 to adjust outer gap rxl from .011 to 0 at .605 and after, but out to .01 earlier plasma full length, no injection target looks good. next shot: no changes |
| May 22 2003 10:11:57:750AM | 1030522003 | Steve Wolfe | shot#3: no changes fizzle, running inside. next shot: drop pg4 by 2msec (to 25msec) |
| May 22 2003 10:24:40:080AM | 1030522004 | Steve Wolfe | shot#4: drop pg4 by 2msec (to 25msec) plasma, full length. Pellet at 1.8? next shot: drop pg4 another 2msec |
| May 22 2003 10:39:23:800AM | 1030522005 | Steve Wolfe | shot#5: drop pg4 another 2msec to 23msec plasma, pellet at 1.7, disruption at 1.77 next shot: drop pg4 to 21msec |
| May 22 2003 10:52:12:033AM | 1030522006 | Steve Wolfe | shot#6: drop pg4 to 21msec plasma, pellet at 1.7, survived. startup is beginning to run outside, no bounces yet. next shot: no changes |
| May 22 2003 11:07:47:953AM | 1030522007 | Steve Wolfe | shot#7: no changes plasma, pellet at 1.7, disrupts at 1.7 next shot: no changes |
| May 22 2003 11:28:24:117AM | 1030522008 | Steve Wolfe | shot#8: no changes plasma, pellet at 1.7, survives (tci drops a fringe) next shot: no changes |
| May 22 2003 11:52:04:620AM | 1030522009 | Steve Wolfe | shot#9: no changes plasma , pellet and disruption at 1.7 startup not running out as fast this time. next shot: try to get a larger outer gap before 0.6sec |
| May 22 2003 12:09:58:367PM | 1030522010 | Steve Wolfe | shot#10: Brian thunks his probe is overheating on its initial bounce, so try to get a larger outer gap before 0.6sec: put a point at [0.60,.659] and move point at .374 from .659 to .6565 dud! No gas? hybrid put out a pulse but nothing on the valve. Maybe a plc glitch next shot: try again, watch the gas plc screen this time |
| May 22 2003 12:21:53:663PM | 1030522011 | Steve Wolfe | shot#11: Brian thunks his probe is overheating on its initial bounce, so try to get a larger outer gap before 0.6sec: put a point at [0.60,.659] and move point at .374 from .659 to .6565 plasma, full length, pellet at 1.7sec startup running a little out, but no bounce next shot: no changes |
| May 22 2003 12:47:20:823PM | 1030522012 | Steve Wolfe | shot#12: no changes plasma disrupts at 1.7 with the pellet. next shot: go to 0.8e20 |
| May 22 2003 01:03:17:170PM | 1030522013 | Steve Wolfe | shot#13: go to 0.8e20 plasma, disrupted at 1.7sec with the pellet. nl04 is reading .95 (before it was 1.15) This one bounced hard in startup, but I didn't notice until too late to change the next shot. next shot: drop nl4 demand to .75e20 |
| May 22 2003 01:11:24:053PM | 1030522014 | Steve Wolfe | shot#14: drop nl4 demand to .75e20 plasma, disrupts at 1.7sec, another bouncer; got some runaways that time. density looks like 8.8e19 next shot: increase pg4 by 2msec to 23msec Earl will pelletize at 1.5sec next shot. |
| May 22 2003 01:18:32:643PM | 1030522015 | Steve Wolfe | shot#15: increase pg4 by 2msec to 23msec Earl will pelletize at 1.5sec shot. plasma full length, still some hards, still bounces next shot: ic_ef4 from -1320 to -1300 |
| May 22 2003 01:42:23:720PM | 1030522016 | Steve Wolfe | shot#16: ic_ef4 from -1320 to -1300 plasma disrupted at 0.5sec, oh1 crowbarred after the disruption startup still bounces, still hards. next shot: increase pg4 to 25msec, despite the disruption |
| May 22 2003 01:57:26:223PM | 1030522017 | Steve Wolfe | shot#17: increase pg4 to 25msec, despite the disruption plasma full length no hards, no bounce; pellet at 1.5sec ok next shot: no changes |
| May 22 2003 02:09:35:697PM | 1030522018 | Steve Wolfe | shot#18: no changes plasma, full length, pellet ok, no bounce next shot: no changes |
| May 22 2003 02:19:53:597PM | 1030522019 | Steve Wolfe | shot#19: no changes plasma full length, pellet ok, no bounce next shot: try to go for the 0.6e20 case |
| May 22 2003 02:42:22:343PM | 1030522020 | Steve Wolfe | shot#20: try to go for the 0.6e20 case program nl4 to 5.0e19, reduce pg3 pre-program from 50 to 30 plasma full length, no pellet; no bounce got 6e19, may have a locked mode at end of flattop, around 1.4sec next shot: no changes, the locked mode isn't bothering Brian |
| May 22 2003 02:53:57:053PM | 1030522021 | Steve Wolfe | shot#21: no changes, the locked mode isn't bothering Brian plasma, full length; still no pellet. locked mode at 1.28, getting close to Brian's data window. next shot: configure a-coil as +Dtop -Dbot -Jtop +Jbot and turn on at full current |
| May 22 2003 03:28:13:823PM | 1030522022 | Steve Wolfe | shot#22: configure a-coil as +Dtop -Dbot -Jtop +Jbot and draw 4000A from 0.8 to 1.8sec raise pg4 by 2msec (#21 was close to bouncing) plasma, disrupted at 1.5sec from the pellet, but the locked mode is GONE. next shot: no changes |
| May 22 2003 03:38:52:160PM | 1030522023 | Steve Wolfe | shot#23: no changes fizzle. NO EF3- the ef3 breaker pulled just prior to INIT and was reset. Probably a fault wasn't cleared. next shot: Try again |
| May 22 2003 03:49:16:340PM | 1030522024 | Steve Wolfe | shot#24: Try again fizzle. got all the supplies this time. next shot: drop pg4 back to 25msec |
| May 22 2003 04:05:10:827PM | 1030522025 | Steve Wolfe | shot#25: drop pg4 back to 25msec plasma full length no pellet startup a little dicey; moves out then back in. No locked mode, density sags a little after 1.3 next shot: repeat |
| May 22 2003 04:16:20:427PM | 1030522026 | Steve Wolfe | shot#26: no changes plasma full length with pellet startup moved furrther out this time, still not bouncing next shot: no changes |
| May 22 2003 04:33:11:930PM | 1030522027 | Steve Wolfe | shot#27: no changes plasma full length with pellet next shot: nl4=1.3e20 |
| May 22 2003 04:43:05:033PM | 1030522028 | Steve Wolfe | shot#28: nl4=1.3e20, raise pg3 maint level to 50 fizzle, bounced hard and didn't recover. next shot: raise pg4 back to 27msec |
| May 22 2003 04:56:57:270PM | 1030522029 | Steve Wolfe | shot#29: raise pg4 back to 27msec, still trying for 1.3e20 plasma full length with hards and a bounce. no pellet. Next shot: Tomorrow. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:14:54:787AM | Plasma | Ok | |
| 2 | 09:36:10:730AM | Plasma | Ok | |
| 3 | 10:02:34:747AM | Plasma | Ok | |
| 4 | 10:15:32:950AM | Plasma | Ok | |
| 5 | 10:32:49:353AM | Plasma | Ok | |
| 6 | 10:48:26:053AM | Plasma | Ok | |
| 7 | 11:02:59:083AM | Plasma | Ok | |
| 8 | 11:20:30:203AM | Plasma | Ok | |
| 9 | 11:38:49:777AM | Plasma | Ok | |
| 10 | 12:00:25:800PM | Plasma | Ok | |
| 11 | 12:13:25:830PM | Plasma | Ok | |
| 12 | 12:35:07:947PM | Plasma | Ok | |
| 13 | 12:49:21:023PM | Plasma | Ok | |
| 14 | 01:02:02:437PM | Plasma | Ok | |
| 15 | 01:14:45:520PM | Plasma | Ok | |
| 16 | 01:27:23:823PM | Plasma | Ok | |
| 17 | 01:48:06:090PM | Plasma | Ok | |
| 18 | 02:03:23:547PM | Plasma | Ok | |
| 19 | 02:16:11:710PM | Plasma | Ok | |
| 20 | 02:32:55:507PM | Plasma | Ok | |
| 21 | 02:48:05:277PM | Plasma | Ok | |
| 22 | 03:20:20:750PM | Plasma | Ok | |
| 23 | 03:32:58:383PM | Plasma | Ok | |
| 24 | 03:45:51:310PM | Plasma | Ok | |
| 25 | 03:58:28:723PM | Plasma | Ok | |
| 26 | 04:12:08:900PM | Plasma | Ok | |
| 27 | 04:25:20:797PM | Plasma | Ok | |
| 28 | 04:39:36:393PM | Plasma | Ok | |
| 29 | 04:53:12:510PM | Plasma | Ok | |