| Miniproposals | ||||||||||||||
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| Operators | |
| Session leader(s): | Olaf Grulke,Stewart Zweben,Jim Terry |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| MP 332 Turbulent Fluctuations in EDA H-mode; SL: Grulke, Terry, Zweben; |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:35:007PM |
| Author: Olaf Grulke |
| Run Plan: second half of MP332 primary purpose: parallel correlation between probe and fast D alpha-diodes Equilibrium configuration as for #1030613025 (Bt=5.4T, Ip=630kA), but now with an outer gap of 2cm Diagnostics: edge Thomson A-port scanning probe F-port scanning probe PCI Reflectometry fast diodes/PSI camera 1) repeat shot #1030613025 but with outer gap 2cm and now with 300 frame PSI5 camera 2) correlation in ELM-free H-mode with the same equilibrium configuration as 1) and with ~1MW RF power Shot 001 - poloidal detachment - no NINJA gas puff - PSI5 trigger at 1.15s - no probe data Shot 002 - Fizzle Shot 003 - good shot - no NINJA gas puff - PSI5 trigger at 1.15s - no probe data - nl04 = 1.4e20 m^-2 Shot 004 - good shot - no NINJA gas puff - PSI5 trigger at 1.15s - no probe data - nl04 = 1.0e20 m^-2 Shot 005 - good shot - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - fast D2 diodes timing wrong at 1.15s - probe plunge symmetric around 0.75s - nl04 = 1.0e20 m^-2 Shot 006 - Fizzle Shot 007 - good shot - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - nl04 = 1.0e20 m^-2 - 25% correlation between probe - fast diodes Shot 008 - good shot - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - nl04 = 1.0e20 m^-2 - 35% correlation between probe - fast diodes Shot 009 - good shot - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - nl04 = 0.775e20 m^-2 - 30% correlation between probe - fast diodes Shot 010 - no plasma Shot 011 - Fizzle Shot 012 - try H-mode (at 1MW RF power), but RF power failed; good plasma - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - probe plunge reduced - nl04 = 0.65e20 m^-2 - 20% correlation between probe - fast diodes Shot 013 - RF power only 600kW, H-mode later than probe/diode data - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - nl04 = 0.70e20 m^-2 - no correlation between probe - fast diodes Shot 014 - Fizzle Shot 015 - RF power only 600kW, H-mode later than probe/diode data - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - nl04 = 0.66e20 m^-2 - no correlation between probe - fast diodes Shot 016 - RF power only at 600kW, H-mode later than probe/diode data - NINJA (A-B Lim) starting at 0.63s - PSI5 trigger at 0.75s - probe plunge / fast D2 diode time window symmetric around 0.75s - nl04 = 0.67e20 m^-2 - no correlation between probe - fast diodes Shot 017 - RF power only at 600kW, H-mode later than probe/diode data - NINJA (A-B Lim) starting at 1.0s (too late) - PSI5 trigger at 1.0s - probe plunge / fast D2 diode time window symmetric around 1.0s - nl04 = 0.80e20 m^-2 - 25% correlation between probe - fast diodes Shot 018 - Fizzle Shot 019 - good shot with 1MW RF power - NINJA (A-B Lim) starting now at 0.87s - PSI5 trigger at 1.0s - probe plunge / fast D2 diode time window symmetric around 1.0s - nl04 = 0.90e20 m^-2 - 40% correlation between probe - fast diodes Shot 020 - good shot with 1MW RF power - NINJA (A-B Lim) starting now at 0.87s - PSI5 trigger at 0.99s - probe plunge / fast D2 diode time window symmetric around 1.0s - nl04 = 0.80e20 m^-2 - 40% correlation between probe - fast diodes Summary: - good L-mode shot with good probe/diode/camera data and with a bigger outer gap than #1030613 - no good ELM-free H-mode captured by diagnostics time window |
| Entered: Jul 7 2004 03:49:35:023PM |
| Author: Olaf Grulke |
| At 1:20 pm (after shot 1031204021) we began the part of the run that was to investigate the edge turbulence as the density limit is approached (MP319). PO: J. Snipes SL: J.terry/S. Zweben The plan was: Look at the edge/SOL turbulence as the density limit is approached. Do this with the folowing diagnostics: PSI 300 frame movie camera with a gas puff, the ASP, the ECE (edge channels), and the reflectometer. After setting up a reasonably reproducible discharge, we wanted to move the observation times to times initially away the the density limit, i.e.n/n_G~0.4, and then to times closer and closer to the density limit. Summary of results: We were not successful in the endeavor. We got only 5 shots (026, 028, 032, 033, 034). The first three poloidally detached too early in the pulse; the last two were the kind of discharge we wanted, i.e. they reached the ~70% of the limit without detaching, but the He gas puff was not optimized, so the PSI ccamera images were very dim. The probe was not inserted. Initially, we attempted to reach the density limit at constant (low) current (0.5MA) and high field (6T). This was in order to keep the ECE from being cutoff at the high densities. We loaded 1030523015. We were puffing He for the gas puff imaging and observing the He I-667 nm line with the movie camera. These discharges detached poloidally around 0.65 sec and were not useful for the goals of the experiment. We then tried ramping the current down, initially ramping to 0.5MA from 0.8MA (shot 032), later from 1.0MA (shots 033 and 034). These 1.0MA shots were sucessfull and should be used for further attempts to study density limit discharges. The details are: Took over the run after shot 1031204021. 022 fizzle 023 fizzle 024 fizzle 025 fizzle 026 detached poloidally at 0.65 s (const I_p shot, B_t=6T). GPI puff D2, view Da 027 fizzle 028 detached poloidally at 0.67 s (const I_p shot, B_t=5.4T). GPI puff D2, view Da 029 fizzle 030 fizzle 031 fizzle 032 detached poloidally at 1.15 s, when n/n_G=0.6 (ramping I_p, B_t=5.4T), GPI puff He, view HeI-667 nm. PSI looking at 1.45s after disruption at 1.43 s 033 n/n_G=0.71 before disruption (ramping I_p, B_t=5.4T), GPI puff He, view HeI-667 nm. PSI looking at 1.35s before disruption at 1.40 s, very weak signal 034 n/n_G=0.73 before disruption (ramping I_p, B_t=5.4T), GPI puff He, view HeI-667 nm. PSI looking at 1.35s before disruption at 1.39 s, very weak signal after shot 034 we turned run over to J. Irby for pre-boronization fiducial. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:19:927PM |
| Author: Joseph Snipes |
| Physics Operator: Snipes Session Leaders: Olaf Grulke, Jim Terry, Stewart Zweben MP 332 Turbulent Fluctuations in EDA H-mode Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030613025 (0.63 MA, 5.4 T, Lower single null) Overnight ECDC in deuterium switched off by 07:00 to pump out Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves: ECE, VUV, DNB ------------------------------------------------------------------------------- RF Setup: all transmitters in Run On by 08:00. ------------------------------------------------------------------------------- Run Plan: second half of MP332 primary purposes: 1) measure parallel correlation between probe and fast D alpha-diodes, 2) measure edge turbulence approaching and up to the density limit. Equilibrium configuration as for #1030613025 (Bt=5.4T, Ip=630kA), but now with an outer gap of 2cm Diagnostics: edge Thomson A-port scanning probe F-port scanning probe PCI Reflectometry fast diodes/PSI camera (for part 2) GPC aligned to cover the outboard edge at 6T. 1) Parallel correlation study (PSI & fast diodes & F-probe). We desire comparison among ELMfree H-mode, EDA H-mode and L-mode plasmas. EDA H-mode data and some L-mode data already exist. We wish to repeat L-mode data with 2 cm outer gap and the 300 frame PSI camera, Thus, we need: i) 3 good L-mode shots with 2 cm outer gap. (no RF.) ii) 3 good ELM-free H-mode shots. Obtain ELMfree H-mode (rather than EDA) by having a low target density. Start with nl_04=6 x 1019 m^-2) and ~2 MW RF. Drop density if needed until ELMfree H-mode obtained. 2) Edge turbulence at or near the Density limit (this part incorporates features of MP 333, M Greenwald, et al.) starting from 1030523015 i) Raise the field to 6T and program a current rampdown to 0.5MA. This yields a density limit of ~3.2e20 m^-3, while keeping the ECE cutoff (~4e20 m^-3) at the plasma edge higher than the density limit. Puff gas to get as close as possible to the density limit. ii) Puff He from NINJA and observe HeI-667 nm line with 300 frame PSI camera. This requires a few shots in order to determine the puff strength needed for observation. iii) Obtain PSI camera movies, scanning prob profiles, and ECE edge Te profiles as the density limit is approached, i.e. at n/n_G=0.7, 0.8, and 0.9 (2 shots each) iv) Obtain PSI camera movies in higher current par of the shot in order to assess the effect (on the spatial resolution) of the view not being alighed parallel to the field at the lower (0.5MA) current. (At the 0.5MA/6T the field angle is ~6 degrees, we view at 10 degrees.) (2 shots) Summary: The run was a difficult one for unknown reasons because of a number of fizzles and two duds. Shot 10 also failed because the TF did not pulse for unknown reasons. Nonetheless, some data was obtained for both MPs. At the end of the run, there were three attempted fiducials that extended the run beyond 5:00 pm. On the third attempt, we got one of the four RF antennas to output 1 MW and several H-modes were obtained. Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 1.938 0.748 2 0.000 0.040 3 1.951 0.767 4 1.955 0.764 5 1.957 0.765 6 0.000 0.036 7 1.224 0.763 8 1.953 0.771 9 1.954 0.767 10 0.000 0.033 11 0.000 0.029 12 1.967 0.772 13 1.973 0.773 14 0.021 0.086 15 1.973 0.704 16 1.973 0.710 17 1.974 0.724 18 0.000 0.055 19 1.971 0.722 20 1.972 0.716 21 0.822 0.727 22 0.000 0.061 23 0.000 0.049 24 0.000 0.043 25 0.000 0.040 26 1.758 0.630 27 0.000 0.037 28 1.713 0.638 29 0.000 0.039 30 0.000 0.026 31 0.000 0.022 32 1.431 0.818 33 1.411 0.998 34 1.426 0.997 35 1.963 1.038 36 0.000 0.046 Finished summary for 1031204 Total of 36 shots. 36 shots. 21 plasmas. 12 fizzles. 2 duds 1 TF fault Shot 1: Copied shot 1031202003 for segment 1, then copied segment 2 from shot 1030613025. Then, changed RCUR to give a 2 cm outer gap based on shot 1031113024. Good shot. Very strange shot with poloidal detachment and a sharkfin. Too much gas. Shot 2: Reduced pre-programmed gas puff from 0.75 s duration to 0.3 s duration and then reduced the amplitude afterward by a factor of 2. Also removed the 50 ms Ar puff. Fizzle! Shot 3: Increased Br0 by 0.5 mT to +0.0003 T. Try again. Good shot. Still another sharkfin, though smaller. Shot 4: Turned off pre-programmed gas puff entirely. Good shot, though now the density just barely reaches 1 x 10^20 m^-2 as desired. Shot 5: Added back some pre-programmed gas at 40 V until 0.25 s then ramping down. Good shot. Shot 6: Repeat. Fizzle! Shot 7: Try reducing pre-puff by 1 ms to 14 ms duration. Good shot though it disrupted at 1.2 s due to some massive influx of gas from somewhere. Perhaps, the strike point is going up against the outer divertor nose. Shot 8: Added Ar puff at 0.3 s for 25 ms duration. Good shot. Shot 9: Reduced nl04 to 7.5 x 10^19 m^-2. Good shot. Still got the shark fin at 1.1 s. Shot 10: Reduce nl04 to 6 x 10^19 m^-2. Add 1 MW of RF from 0.5 to 1.5 s. TF did not pulse. No plasma. Shot 11: Try again. Fizzle. Shot 12: Increased prepuff to 15 ms duration. Good shot. No RF. Shot 13: Repeat with RF. We got 0.6 MW of Rf out of D. E port did not pulse. Brief H-modes late. Shot 14: Repeat with more RF. Increased CLEARIN by 1 mm for the inner wall probe. Then, increased RCUR by 0.5 mm to compensate for the corresponding change in outer gap. Fizzle. Shot 15: Removed pre-programmed gas puff since we do not need it for low density. Raised EF4 current by 15 A to -1315 A. Try again. Good shot. Type III ELMy H-mode. Shot 16: Repeat. Good shot. Shot 17: Repeat. Good shot. Shot 18: Repeat. Fizzle! Shot 19: Reduced Br0 to -0.0001 T and reduced EF4 current by 15 A to -1330 A as before. Good shot. Shot 20: Repeat. Good shot. Several H-modes. Shot 21: Repeat. Disrupted at 0.82 s probably due to an injection of something. Shot 22: Changing to density limit run. Loaded shot 1030523015 into segment 2. Fizzle! Shot 23: Try again. Fizzle again! Shot 24: Decreased Br0 to -3 x 10^-4 T and decreased prepuff by 1 ms to 14 ms duration. Try again. Fizzle! Shot 25: Decreased OH1 current from -19700 A to -20000 to return to what it was last week. Fizzle. Shot 26: Increased Br0 by 1 mT to +0.0007 T. Went back to 15 ms prepuff. Good shot. Shot 27: Turned Ar puff back on with 25 ms duration from 0.3 s at 100 V. Took out TF ramp to now maintain the field at 5.4 T. Fizzle! Shot 28: Increased prepuff by 2 ms to 17 ms duration. Increased EF4 current by 10 A to -1320 A. Try again. Good shot. Shot 29: Increased Ip to 0.8 MA from 0.43 to 0.75 s, then ramp down to 0.5 MA by 1.5 s. Fizzle! Shot 30: Increased EF4 current by 15 A to -1305 A. Increased Ar puff to 35 ms duration. Try again. Dud! Shot 31: Decreased prepuff by 2 ms to 15 ms duration. Returned EF4 current to -1320 A. Dud! Shot 32: Reloaded segment 1 from shot 1031204008. Try again. Good shot. Shot 33: Raised Ip to 1 MA at the flattop and 0.7 MA at 1.5 s. Reduced prepuff to 13 ms duration. Good shot. Shot 34: Repeat. Good shot. Shot 35: Fiducial shot copied shot 1030611002 but changed the A-coil current to 2000 A from 0.6 - 1.5 s and nl04 to 8 x 10^19 m^-2. RF programmed in steps from 1 to 4 MW. Good shot but no RF. Shot 36: Repeat fiducial with RF and with no pre-programmed gas puff during the shot. Fizzle! Shot 37: Repeat fiducial with RF and with no pre-programmed gas puff during the shot and plasma! Also reduced Br0 by 0.4 mT to -0.0007 T. Only one RF antenna worked, but otherwise a good shot. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Dec 4 2003 09:02:06:923AM | Joseph Snipes | Physics Operator: Snipes Session Leaders: Olaf Grulke, Jim Terry, Stewart Zweben MP 332 Turbulent Fluctuations in EDA H-mode Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030613025 (0.63 MA, 5.4 T, Lower single null) Overnight ECDC in deuterium switched off by 07:00 to pump out Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves: ECE, VUV, DNB ------------------------------------------------------------------------------- RF Setup: all transmitters in Run On by 08:00. ------------------------------------------------------------------------------- Run Plan: second half of MP332 primary purposes: 1) measure parallel correlation between probe and fast D alpha-diodes, 2) measure edge turbulence approaching and up to the density limit. Equilibrium configuration as for #1030613025 (Bt=5.4T, Ip=630kA), but now with an outer gap of 2cm Diagnostics: edge Thomson A-port scanning probe F-port scanning probe PCI Reflectometry fast diodes/PSI camera (for part 2) GPC aligned to cover the outboard edge at 6T. 1) Parallel correlation study (PSI & fast diodes & F-probe). We desire comparison among ELMfree H-mode, EDA H-mode and L-mode plasmas. EDA H-mode data and some L-mode data already exist. We wish to repeat L-mode data with 2 cm outer gap and the 300 frame PSI camera, Thus, we need: i) 3 good L-mode shots with 2 cm outer gap. (no RF.) ii) 3 good ELM-free H-mode shots. Obtain ELMfree H-mode (rather than EDA) by having a low target density. Start with nl_04=6 x 1019 m^-2) and ~2 MW RF. Drop density if needed until ELMfree H-mode obtained. 2) Edge turbulence at or near the Density limit (this part incorporates features of MP 333, M Greenwald, et al.) starting from 1030523015 i) Raise the field to 6T and program a current rampdown to 0.5MA. This yields a density limit of ~3.2e20 m^-3, while keeping the ECE cutoff (~4e20 m^-3) at the plasma edge higher than the density limit. Puff gas to get as close as possible to the density limit. ii) Puff He from NINJA and observe HeI-667 nm line with 300 frame PSI camera. This requires a few shots in order to determine the puff strength needed for observation. iii) Obtain PSI camera movies, scanning prob profiles, and ECE edge Te profiles as the density limit is approached, i.e. at n/n_G=0.7, 0.8, and 0.9 (2 shots each) iv) Obtain PSI camera movies in higher current par of the shot in order to assess the effect (on the spatial resolution) of the view not being alighed parallel to the field at the lower (0.5MA) current. (At the 0.5MA/6T the field angle is ~6 degrees, we view at 10 degrees.) (2 shots) | |
| Dec 4 2003 09:15:12:450AM | 1031204001 | Joseph Snipes | Shot 1: Copied shot 1031202003 for segment 1, then copied segment 2 from shot 1030613025. Then, changed RCUR to give a 2 cm outer gap based on shot 1031113024. Good shot. Very strange shot with poloidal detachment and a sharkfin. Too much gas. |
| Dec 4 2003 09:22:18:770AM | 1031204002 | Joseph Snipes | Shot 2: Reduced pre-programmed gas puff from 0.75 s duration to 0.3 s duration and then reduced the amplitude afterward by a factor of 2. Also removed the 50 ms Ar puff. Fizzle! |
| Dec 4 2003 09:38:17:480AM | 1031204003 | Joseph Snipes | Shot 3: Increased Br0 by 0.5 mT to +0.0003 T. Try again. Good shot. Still another sharkfin, though smaller. |
| Dec 4 2003 09:55:17:717AM | 1031204004 | Joseph Snipes | Shot 4: Turned off pre-programmed gas puff entirely. Good shot, though now the density just barely reaches 1 x 10^20 m^-2 as desired. |
| Dec 4 2003 10:03:11:643AM | 1031204005 | Joseph Snipes | Shot 5: Added back some pre-programmed gas at 40 V until 0.25 s then ramping down. Good shot. |
| Dec 4 2003 10:18:00:963AM | 1031204006 | Joseph Snipes | Shot 6: Repeat. Fizzle! |
| Dec 4 2003 10:34:24:517AM | 1031204007 | Joseph Snipes | Shot 7: Try reducing pre-puff by 1 ms to 14 ms duration. Good shot though it disrupted at 1.2 s due to some massive influx of gas from somewhere. Perhaps, the strike point is going up against the outer divertor nose. |
| Dec 4 2003 10:48:37:290AM | 1031204008 | Joseph Snipes | Shot 8: Added Ar puff at 0.3 s for 25 ms duration. Good shot. |
| Dec 4 2003 10:59:50:620AM | 1031204009 | Joseph Snipes | Shot 9: Reduced nl04 to 7.5 x 10^19 m^-2. Good shot. Still got the shark fin at 1.1 s. |
| Dec 4 2003 11:10:22:743AM | 1031204010 | Joseph Snipes | Shot 10: Reduce nl04 to 6 x 10^19 m^-2. Add 1 MW of RF from 0.5 to 1.5 s. TF did not pulse. No plasma. |
| Dec 4 2003 11:22:01:833AM | 1031204011 | Joseph Snipes | Shot 11: Try again. Fizzle. |
| Dec 4 2003 11:37:48:217AM | 1031204012 | Joseph Snipes | Shot 12: Increased prepuff to 15 ms duration. Good shot. No RF. |
| Dec 4 2003 11:51:05:180AM | 1031204013 | Joseph Snipes | Shot 13: Repeat with RF. We got 0.6 MW of Rf out of D. E port did not pulse. Brief H-modes late. |
| Dec 4 2003 12:03:48:613PM | 1031204014 | Joseph Snipes | Shot 14: Repeat with more RF. Increased CLEARIN by 1 mm for the inner wall probe. Then, increased RCUR by 0.5 mm to compensate for the corresponding change in outer gap. Fizzle. |
| Dec 4 2003 12:27:21:217PM | 1031204015 | Joseph Snipes | Shot 15: Removed pre-programmed gas puff since we do not need it for low density. Raised EF4 current by 15 A to -1315 A. Try again. Good shot. Type III ELMy H-mode. |
| Dec 4 2003 12:33:47:943PM | 1031204016 | Joseph Snipes | Shot 16: Repeat. Good shot. |
| Dec 4 2003 12:42:02:510PM | 1031204017 | Joseph Snipes | Shot 17: Repeat. Good shot. |
| Dec 4 2003 12:55:23:677PM | 1031204018 | Joseph Snipes | Shot 18: Repeat. Fizzle! |
| Dec 4 2003 01:07:40:797PM | 1031204019 | Joseph Snipes | Shot 19: Reduced Br0 to -0.0001 T and reduced EF4 current by 15 A to -1330 A as before. Good shot. |
| Dec 4 2003 01:20:18:887PM | 1031204020 | Joseph Snipes | Shot 20: Repeat. Good shot. Several H-modes. |
| Dec 4 2003 01:35:23:300PM | 1031204021 | Joseph Snipes | Shot 21: Repeat. Disrupted at 0.82 s probably due to an injection of something. |
| Dec 4 2003 01:58:17:517PM | 1031204022 | Joseph Snipes | Shot 22: Changing to density limit run. Loaded shot 1030523015 into segment 2. Fizzle! |
| Dec 4 2003 02:10:11:887PM | 1031204023 | Joseph Snipes | Shot 23: Try again. Fizzle again! |
| Dec 4 2003 02:36:36:190PM | 1031204024 | Joseph Snipes | Shot 24: Decreased Br0 to -3 x 10^-4 T and decreased prepuff by 1 ms to 14 ms duration. Try again. Fizzle! |
| Dec 4 2003 02:43:06:073PM | 1031204025 | Joseph Snipes | Shot 25: Decreased OH1 current from -19700 A to -20000 to return to what it was last week. Fizzle. |
| Dec 4 2003 02:56:43:957PM | 1031204026 | Joseph Snipes | Shot 26: Increased Br0 by 1 mT to +0.0007 T. Went back to 15 ms prepuff. Good shot. |
| Dec 4 2003 03:10:03:990PM | 1031204027 | Joseph Snipes | Shot 27: Turned Ar puff back on with 25 ms duration from 0.3 s at 100 V. Took out TF ramp to now maintain the field at 5.4 T. Fizzle! |
| Dec 4 2003 03:22:17:703PM | 1031204028 | Joseph Snipes | Shot 28: Increased prepuff by 2 ms to 17 ms duration. Increased EF4 current by 10 A to -1320 A. Try again. Good shot. |
| Dec 4 2003 03:34:54:950PM | 1031204029 | Joseph Snipes | Shot 29: Increased Ip to 0.8 MA from 0.43 to 0.75 s, then ramp down to 0.5 MA by 1.5 s. Fizzle! |
| Dec 4 2003 03:49:32:880PM | 1031204030 | Joseph Snipes | Shot 30: Increased EF4 current by 15 A to -1305 A. Increased Ar puff to 35 ms duration. Try again. Dud! |
| Dec 4 2003 04:01:32:130PM | 1031204031 | Joseph Snipes | Shot 31: Decreased prepuff by 2 ms to 15 ms duration. Returned EF4 current to -1320 A. Dud! |
| Dec 4 2003 04:15:23:873PM | 1031204032 | Joseph Snipes | Shot 32: Reloaded segment 1 from shot 1031204008. Try again. Good shot. |
| Dec 4 2003 04:28:29:307PM | 1031204033 | Joseph Snipes | Shot 33: Raised Ip to 1 MA at the flattop and 0.7 MA at 1.5 s. Reduced prepuff to 13 ms duration. Good shot. |
| Dec 4 2003 04:40:58:070PM | 1031204034 | Joseph Snipes | Shot 34: Repeat. Good shot. |
| Dec 4 2003 04:56:17:060PM | 1031204035 | Joseph Snipes | Shot 35: Fiducial shot copied shot 1030611002 but changed the A-coil current to 2000 A from 0.6 - 1.5 s and nl04 to 8 x 10^19 m^-2. RF programmed in steps from 1 to 4 MW. Good shot but no RF. |
| Dec 4 2003 05:07:28:170PM | 1031204036 | Joseph Snipes | Shot 36: Repeat fiducial with RF and with no pre-programmed gas puff during the shot. Fizzle! |
| Dec 4 2003 05:20:34:053PM | 1031204037 | Joseph Snipes | Shot 37: Repeat fiducial with RF and with no pre-programmed gas puff during the shot and plasma! Also reduced Br0 by 0.4 mT to -0.0007 T. Only one RF antenna worked, but otherwise a good shot. |
| Dec 4 2003 05:35:36:203PM | 1031204037 | Joseph Snipes | Summary: The run was a difficult one for unknown reasons because of a number of fizzles and two duds. Shot 10 also failed because the TF did not pulse for unknown reasons. Nonetheless, some data was obtained for both MPs. At the end of the run, there were three attempted fiducials that extended the run beyond 5:00 pm. On the third attempt, we got one of the four RF antennas to output 1 MW and several H-modes were obtained. Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 1.938 0.748 2 0.000 0.040 3 1.951 0.767 4 1.955 0.764 5 1.957 0.765 6 0.000 0.036 7 1.224 0.763 8 1.953 0.771 9 1.954 0.767 10 0.000 0.033 11 0.000 0.029 12 1.967 0.772 13 1.973 0.773 14 0.021 0.086 15 1.973 0.704 16 1.973 0.710 17 1.974 0.724 18 0.000 0.055 19 1.971 0.722 20 1.972 0.716 21 0.822 0.727 22 0.000 0.061 23 0.000 0.049 24 0.000 0.043 25 0.000 0.040 26 1.758 0.630 27 0.000 0.037 28 1.713 0.638 29 0.000 0.039 30 0.000 0.026 31 0.000 0.022 32 1.431 0.818 33 1.411 0.998 34 1.426 0.997 35 1.963 1.038 36 0.000 0.046 Finished summary for 1031204 Total of 36 shots. 36 shots. 21 plasmas. 12 fizzles. 2 duds 1 TF fault |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:01:38:550AM | Plasma | Ok | |
| 2 | 09:15:44:980AM | Plasma | Ok | |
| 3 | 09:28:35:727AM | Plasma | Ok | |
| 4 | 09:41:10:973AM | Plasma | Ok | |
| 5 | 10:00:34:193AM | Plasma | Ok | |
| 6 | 10:13:50:440AM | Plasma | Ok | |
| 7 | 10:26:24:903AM | Plasma | Ok | |
| 8 | 10:41:54:753AM | Plasma | Ok | |
| 9 | 10:54:30:953AM | Plasma | Ok | |
| 10 | 11:07:38:543AM | Plasma | Bad | No TF |
| 11 | 11:20:06:773AM | Plasma | Ok | |
| 12 | 11:32:44:270AM | Plasma | Ok | |
| 13 | 11:45:22:407AM | Plasma | Ok | |
| 14 | 12:01:42:257PM | Plasma | Ok | |
| 15 | 12:14:59:753PM | Plasma | Ok | |
| 16 | 12:27:33:030PM | Plasma | Ok | |
| 17 | 12:40:21:090PM | Plasma | Ok | |
| 18 | 12:53:00:460PM | Plasma | Ok | |
| 19 | 01:05:55:283PM | Plasma | Ok | |
| 20 | 01:18:22:923PM | Plasma | Ok | |
| 21 | 01:32:31:040PM | Plasma | Ok | |
| 22 | 01:55:42:800PM | Plasma | Ok | |
| 23 | 02:08:21:127PM | Plasma | Ok | |
| 24 | 02:28:31:343PM | Plasma | Ok | |
| 25 | 02:41:07:607PM | Plasma | Ok | |
| 26 | 02:53:43:040PM | Plasma | Ok | |
| 27 | 03:07:52:347PM | Plasma | Ok | |
| 28 | 03:20:33:160PM | Plasma | Ok | |
| 29 | 03:33:10:580PM | Plasma | Ok | |
| 30 | 03:47:29:040PM | Plasma | Ok | |
| 31 | 03:59:51:960PM | Plasma | Ok | |
| 32 | 04:12:46:347PM | Plasma | Ok | |
| 33 | 04:26:32:967PM | Plasma | Ok | |
| 34 | 04:39:02:510PM | Plasma | Ok | |
| 35 | 04:52:33:910PM | Plasma | Ok | |
| 36 | 05:05:07:670PM | Plasma | Ok | |
| 37 | 05:17:19:137PM | Plasma | Ok | |