| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Olaf Grulke |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Ed Fitzgerald,Gary Dekow |
| Engineering Operator Run Comment |
| MP 332 Turbulent Fluctuations in EDA H-mode; PO: Snipes; EO: Dekow/Fitz/ |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:34:850PM |
| 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) Parallel correlation study (PSI & fast diodes & F-probe) - 2 good shots per configuration i) ELM-free H-mode at low density (nl~7 x 1019 m^-2) with ~2 MW RF ii) Establish EDA --> use nl04 = 1.5 x 1020 m^-2 and 2 MW RF as on 980203015 iii) Raise density with inner wall Ninja deuterium puffing sequentially as far as possible within EDA shot to shot iv) repeat shot 1030613025 with 2 cm outer gap (best L-mode correlation shot) with no RF 2) Density limit (assuming the limit cannot be reached within H-mode) i) stay in Ohmic L-mode and raise the density through inner wall gas puffing sequentially to get as close as possible to the density limit (nebar ~ 4 x 1020 m^-3) --> probably without F-probe ii) if fueling is insufficient change configuration to near DN iii) if background D alpha light is too great relative to the increase from D alpha gas puff, then stop inner wall gas puffing and puff helium instead from the outer wall, open the normal fueling valve throughout the shot and ramp Ip down from 800 kA to 600 kA Shot 001 - test Shot 002 - Fizzle Puffing D2 (482 PSI) thru NINJA (A-B lim only). Triggering intensifier of PSI5 with J221 - start the gate 80 microsec (20 frame times) before PSI start, stop the gate 400 microsec after end of data period. timings: diodes start 1.05s at 1MHz PSI camera 1.15-1.1512 s (intensifier gate is J221 chan 10 set to [4649920,4651600] NINJA start: 1.0 for .2 s Shot 003 - Dud Puffing D2 (482 PSI) thru NINJA (A-B lim only). Triggering intensifier of PSI5 with J221 - start the gate 80 microsec (20 frame times) before PSI start, stop the gate 400 microsec after end of data period. timings: diodes start 1.05s at 1MHz PSI camera 1.15-1.1512 s (intensifier gate is J221 chan 10 set to [4649920,4651600] NINJA start: 1.0 for .2 s Shot 004 - No Power Shot 005 - No Power Shot 006 - Fizzle Shots 007-010 - Duds Shot 011 - QC mode seen on fast diode views 12 and 14 (13 is saturated) - not seen on views 3-11 - PSI5 at 1.1 s - no data from probes Shot 012 - QC mode seen on fast diode views 11-14 - not seen on views 3-10 - PSI5 at 1.1 s - 20% correlation between F-probe & diodes Shot 013 - fizzle Shot 014 - QC mode seen on fast diode views 12-14 (small on 12) - not seen on views 3-11 - PSI5 at 1.15 s - 25% correlation between F-probe & diodes Shot 015 - no QC mode seen on fast diode views 3-11 - views 12-14 are saturated - 30% correlation between F-probe & diodes Shot 016 - fizzle Shot 017 - fizzle Shot 018 - Poloidal detachment during PSI5 and fast diode interval - no QC mode seen on fast diode views 3-12 - views 13-14 are saturated - PSI5 at 1.15 s - 35% correlation between F-probe & diodes Shot 019 - fizzle Shot 020 - OK shot - in EDA H-mode for PSI time and most of fast diode time - Puffing D2 (455 PSI) thru NINJA (A-B lim only). - Triggering intensifier of PSI5 with J221 - start the gate 80 microsec (20 frame times) before PSI start, stop the gate 400 microsec after end of data period. timings: diodes start 1.05 s at 1MHz PSI camera 1.1515-1.1527 s (intensifier gate is J221 chan 10 set to [4651420,4653100] NINJA start: 0.95 for .2 s - 20% correlation between F-probe & diodes Shot 021 - dirupted at 0.65 s, before PSI camera and before fast diodes. Shot 022 - PSI5 catches a dither between EDA H-mode and L-mode!!! - Fast diodes see EDA, H-L transition, and dithers. - 20% correlation between F-probe & diodes Shot 023 - PSI5 and fast diodes see EDA H-mode. - 20% correlation between F-probe & diodes Shot 024 - PSI5 and fast diodes see EDA H-mode. - no correlation between F-probe & diodes Shot 025 - PSI5 and fast diodes see EDA H-mode, but there is a strange density rise in the fast diode time window. - no correlation between F-probe & diodes |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:19:707PM |
| Author: Joseph Snipes |
| Physics Operator: Snipes 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: transmitters 1, 3, and 4 in Run On by 08:00. ------------------------------------------------------------------------------- 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) Parallel correlation study (PSI & fast diodes & F-probe) - 2 good shots per configuration i) ELM-free H-mode at low density (nl~7 x 1019 m^-2) with ~2 MW RF ii) Establish EDA --> use nl04 = 1.5 x 1020 m^-2 and 2 MW RF as on 980203015 iii) Raise density with inner wall Ninja deuterium puffing sequentially as far as possible within EDA shot to shot iv) repeat shot 1030613025 with 2 cm outer gap (best L-mode correlation shot) with no RF 2) Density limit (assuming the limit cannot be reached within H-mode) i) stay in Ohmic L-mode and raise the density through inner wall gas puffing sequentially to get as close as possible to the density limit (nebar ~ 4 x 1020 m^-3) --> probably without F-probe ii) if fueling is insufficient change configuration to near DN iii) if background D alpha light is too great relative to the increase from D alpha gas puff, then stop inner wall gas puffing and puff helium instead from the outer wall, open the normal fueling valve throughout the shot and ramp Ip down from 800 kA to 600 kA Summary: The run was a difficult one, but at the end of the day, we did manage to get the machine running O.K. and some correlation results were obtained. There were problems with an EF1 power supply early in the day and there were also computer problems that slowed down the run considerably. Then, fizzles plagued the run until I looked at 1031106, which had good plasmas almost all day long. By adjusting Br0 and EF4 to give similar fields at breakdown, the plasmas began to take off. Shot 21 had a mysterious power supply fault that led to a disruption at 0.65 s, but it went away on the next shot. Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 0.000 0.002 2 0.000 0.040 3 0.000 0.026No Ip 4 5 0.000 0.003 6 0.000 0.039 7 0.000 0.018 8 0.000 0.020 9 0.000 0.020 10 0.000 0.017 11 1.959 0.738 12 1.955 0.738 13 0.000 0.027 14 1.954 0.700 15 1.892 0.734 16 0.000 0.021 17 0.000 0.030 18 1.924 0.670 19 0.000 0.022 20 1.955 0.729 21 0.654 0.725 22 1.953 0.712 23 1.951 0.716 24 1.958 0.721 25 1.961 0.717 Finished summary for 1031113 Total of 25 shots. 25 shots. 11 plasmas. 6 fizzles. 5 duds, 3 power supply/computer faults Shot 1: Loaded shot 1030613025 and decreased RCUR by 7 mm to 0.654 m throughout the flattop. Reduced nl04 to 7 x 10^19 m^-2. A-coil currents are already set to zero. No power shot due to an EF1 crowbar fault before the pulse. Shot 2: Try again. Fizzle. Shot 3: Increased Br0 by 1 mT to -0.0015 T. Increased EF4 current by 20 A to -1300 A. Increased prepuff by 2 ms to 23 ms duration. Dud! Shot 4: Increased Br0 to 0. Increased prepuff by 1 ms to 25 ms duration. No power shot. EF1 crowbar fault again before the pulse. Computer system hung as well. Shot 5: Try again. No power shot due to computer hang in INIT. Shot 6: Try again. Fizzle. Shot 7: Copied segment 1 from shot 1031112022 and increased prepuff to 24 ms duration. Dud! Shot 8: Increased Br0 by 0.5 mT to 1.5 mT. Increased prepuff by 3 ms to 27 ms duration. Dud! Shot 9: 10 minutes ECDC in D2 then repeat. Dud again. Shot 10: Decreased EF4 current from -1310 A to -1320 A. Reduced gas by 2 ms to 25 ms duration. Dud. Shot 11: Decreased EF4 current to -1335 A. Lowered Br0 to 1 mT. Plasma. Shot 12: Good shot. Got a long EDA H-mode. Shot 13: Reduced prepuff by 2 ms to 23 ms duration. Fizzle! Shot 14: Reduced prepuff by 2 ms again to 21 ms duration. Good shot. Nice long EDA with 1 MW of RF. Shot 15: Ramp nl04 up to 1.5 x 10^20 m^-2 from 0.8 to 0.85 s then hold there until 1.2 s and ramp the density back down. Good shot. Shot 16: Reduced Ip by 30 kA to 620 kA. Fizzle! Shot 17: Reduced EF4 by 10 A to -1345 A. Increased prepuff by 2 ms back to 23 ms duration. Fizzle! Shot 18: Increased Br0 by 0.5 mT to 1.5 mT. Decreased EF4 again to -1355 A. Good shot. Gas puff knocked out the RF. Shot 19: Removed the preprogrammed density rise in the H-mode. Fizzle. Shot 20: Decreased prepuff by 1 ms to 22 ms duration. Good shot. Shot 21: Repeat with inner wall gas puffing from 0.65 - 0.95 s. Disrupted at 0.65 s. Appears to be a power supply fault before the plasma disrupts. OH2_L jumps at 0.56 s. Shot 22: Repeat. Good shot. Shot 23: Repeat to get better probe data. Good shot. Shot 24: Changed the density to nl04 = 4 x 10^19 m^-2 from 0.6 s for the rest of the flattop. Good shot. Shot 25: Also lowered the density before 0.6 s to 4 x 10^19 m^-2. Good shot. This would make a good AT target plasma since it is an EDA H-mode at 1 x 10^20 m^-2 in H-mode. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Nov 13 2003 08:20:23:720AM | Joseph Snipes | Physics Operator: Snipes 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: transmitters 1, 3, and 4 in Run On by 08:00. ------------------------------------------------------------------------------- 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) Parallel correlation study (PSI & fast diodes & F-probe) - 2 good shots per configuration i) ELM-free H-mode at low density (nl~7 x 1019 m^-2) with ~2 MW RF ii) Establish EDA --> use nl04 = 1.5 x 1020 m^-2 and 2 MW RF as on 980203015 iii) Raise density with inner wall Ninja deuterium puffing sequentially as far as possible within EDA shot to shot iv) repeat shot 1030613025 with 2 cm outer gap (best L-mode correlation shot) with no RF 2) Density limit (assuming the limit cannot be reached within H-mode) i) stay in Ohmic L-mode and raise the density through inner wall gas puffing sequentially to get as close as possible to the density limit (nebar ~ 4 x 1020 m^-3) --> probably without F-probe ii) if fueling is insufficient change configuration to near DN iii) if background D alpha light is too great relative to the increase from D alpha gas puff, then stop inner wall gas puffing and puff helium instead from the outer wall, open the normal fueling valve throughout the shot and ramp Ip down from 800 kA to 600 kA | |
| Nov 13 2003 09:15:39:870AM | 1031113001 | Joseph Snipes | Shot 1: Loaded shot 1030613025 and decreased RCUR by 7 mm to 0.654 m throughout the flattop. Reduced nl04 to 7 x 10^19 m^-2. A-coil currents are already set to zero. No power shot due to an EF1 crowbar fault before the pulse. |
| Nov 13 2003 09:24:12:613AM | 1031113002 | Joseph Snipes | Shot 2: Try again. Fizzle! |
| Nov 13 2003 09:37:49:263AM | 1031113003 | Joseph Snipes | Shot 3: Increased Br0 by 1 mT to -0.0015 T. Increased EF4 current by 20 A to -1300 A. Increased prepuff by 2 ms to 23 ms duration. Dud! |
| Nov 13 2003 09:54:30:247AM | 1031113003 | Joseph Snipes | Shot 4: Increased Br0 to 0. Increased prepuff by 1 ms to 25 ms duration. No power shot. EF1 crowbar fault again before the pulse. Computer system hung as well. |
| Nov 13 2003 10:58:33:343AM | 1031113003 | Joseph Snipes | There will be at least another 20 - 30 minute delay to resolve the EF1 fault. |
| Nov 13 2003 11:36:01:010AM | 1031113005 | Joseph Snipes | Shot 5: Try again. No power shot due to computer hang in INIT. |
| Nov 13 2003 11:45:34:097AM | 1031113006 | Joseph Snipes | Shot 6: Try again. Fizzle. |
| Nov 13 2003 12:03:38:940PM | 1031113007 | Joseph Snipes | Shot 7: Copied segment 1 from shot 1031112022 and increased prepuff to 24 ms duration. Dud! |
| Nov 13 2003 12:14:01:307PM | 1031113008 | Joseph Snipes | Shot 8: Increased Br0 by 0.5 mT to 1.5 mT. Increased prepuff by 3 ms to 27 ms duration. Dud! |
| Nov 13 2003 12:40:41:450PM | 1031113009 | Joseph Snipes | Shot 9: 10 minutes ECDC in D2 then repeat. Dud again. |
| Nov 13 2003 01:02:05:170PM | 1031113010 | Joseph Snipes | Shot 10: Decreased EF4 current from -1310 A to -1320 A. Reduced gas by 2 ms to 25 ms duration. Dud. |
| Nov 13 2003 01:23:23:373PM | 1031113011 | Joseph Snipes | Shot 11: Decreased EF4 current to -1335 A. Lowered Br0 to 1 mT. Plasma. Got EDA H-mode. |
| Nov 13 2003 01:31:31:167PM | 1031113012 | Joseph Snipes | Shot 12: Repeat. Good shot. Got a long EDA H-mode. |
| Nov 13 2003 01:40:12:447PM | 1031113013 | Joseph Snipes | Shot 13: Reduced prepuff by 2 ms to 23 ms duration. Fizzle! |
| Nov 13 2003 02:05:14:993PM | 1031113014 | Joseph Snipes | Shot 14: Reduced prepuff by 2 ms again to 21 ms duration. Good shot. Nice long EDA H-mode with 1 MW of RF. |
| Nov 13 2003 02:31:51:587PM | 1031113015 | Joseph Snipes | Shot 15: Ramp nl04 up to 1.5 x 10^20 m^-2 from 0.8 to 0.85 s then hold there until 1.2 s and ramp the density back down. Good shot. |
| Nov 13 2003 02:32:06:417PM | 1031113016 | Joseph Snipes | Shot 16: Reduced Ip by 30 kA to 620 kA. Fizzle! |
| Nov 13 2003 02:47:13:417PM | 1031113017 | Joseph Snipes | Shot 17: Reduced EF4 by 10 A to -1345 A. Increased prepuff by 2 ms back to 23 ms duration. Fizzle! |
| Nov 13 2003 03:07:06:493PM | 1031113018 | Joseph Snipes | Shot 18: Increased Br0 by 0.5 mT to 1.5 mT. Decreased EF4 again to -1355 A. Good shot. Gas puff knocked out the RF. |
| Nov 13 2003 03:16:54:010PM | 1031113019 | Joseph Snipes | Shot 19: Removed the preprogrammed density rise in the H-mode. Fizzle. |
| Nov 13 2003 03:40:03:900PM | 1031113020 | Joseph Snipes | Shot 20: Decreased prepuff by 1 ms to 22 ms duration. Good shot. |
| Nov 13 2003 04:01:12:667PM | 1031113021 | Joseph Snipes | Shot 21: Repeat with inner wall gas puffing from 0.65 - 0.95 s. Disrupted at 0.65 s. Appears to be a power supply fault before the plasma disrupts. OH2_L jumps at 0.56 s. |
| Nov 13 2003 04:15:37:743PM | 1031113022 | Joseph Snipes | Shot 22: Repeat. Good shot. |
| Nov 13 2003 04:27:34:510PM | 1031113023 | Joseph Snipes | Shot 23: Repeat to get better probe data. Good shot. |
| Nov 13 2003 04:42:53:840PM | 1031113024 | Joseph Snipes | Shot 24: Changed the density to nl04 = 4 x 10^19 m^-2 from 0.6 s for the rest of the flattop. Good shot. |
| Nov 13 2003 05:01:53:400PM | 1031113025 | Joseph Snipes | Shot 25: Also lowered the density before 0.6 s to 4 x 10^19 m^-2. Good shot. This would make a good AT target plasma since it is an EDA H-mode at 1 x 10^20 m^-2 in H-mode. |
| Nov 13 2003 05:14:10:980PM | 1031113025 | Joseph Snipes | Summary: The run was a difficult one, but at the end of the day, we did manage to get the machine running O.K. and some correlation results were obtained. There were problems with an EF1 power supply early in the day and there were also computer problems that slowed down the run considerably. Then, fizzles plagued the run until I looked at 1031106, which had good plasmas almost all day long. By adjusting Br0 and EF4 to give similar fields at breakdown, the plasmas began to take off. Shot 21 had a mysterious power supply fault that led to a disruption at 0.65 s, but it went away on the next shot. Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 0.000 0.002 2 0.000 0.040 3 0.000 0.026No Ip 4 5 0.000 0.003 6 0.000 0.039 7 0.000 0.018 8 0.000 0.020 9 0.000 0.020 10 0.000 0.017 11 1.959 0.738 12 1.955 0.738 13 0.000 0.027 14 1.954 0.700 15 1.892 0.734 16 0.000 0.021 17 0.000 0.030 18 1.924 0.670 19 0.000 0.022 20 1.955 0.729 21 0.654 0.725 22 1.953 0.712 23 1.951 0.716 24 1.958 0.721 25 1.961 0.717 Finished summary for 1031113 Total of 25 shots. 25 shots. 11 plasmas. 6 fizzles. 5 duds, 3 power supply/computer faults |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:04:33:770AM | Plasma | Bad | No EF1 Enable on State |
| 2 | 09:22:20:253AM | Plasma | Ok | |
| 3 | 09:34:58:870AM | Plasma | Ok | |
| 5 | 11:34:54:637AM | Plasma | Bad | IGOR Problem |
| 6 | 11:43:29:033AM | Plasma | Ok | |
| 7 | 11:57:43:933AM | Plasma | Ok | |
| 8 | 12:10:20:350PM | Plasma | Ok | |
| 9 | 12:38:21:420PM | Plasma | Ok | |
| 10 | 12:50:48:833PM | Plasma | Ok | |
| 11 | 01:03:34:890PM | Plasma | Ok | |
| 12 | 01:20:53:590PM | Plasma | Ok | |
| 13 | 01:34:04:430PM | Plasma | Ok | |
| 14 | 01:46:35:213PM | Plasma | Ok | |
| 15 | 02:02:38:323PM | Plasma | Ok | |
| 16 | 02:25:18:650PM | Plasma | Ok | |
| 17 | 02:45:10:713PM | Plasma | Ok | |
| 18 | 02:57:36:340PM | Plasma | Ok | |
| 19 | 03:11:57:057PM | Plasma | Ok | |
| 20 | 03:27:19:213PM | Plasma | Ok | |
| 21 | 03:44:44:510PM | Plasma | Bad | OH2L Comm Fault |
| 22 | 04:13:01:387PM | Plasma | Ok | |
| 23 | 04:25:46:633PM | Plasma | Ok | |
| 24 | 04:40:00:917PM | Plasma | Ok | |
| 25 | 04:54:00:027PM | Plasma | Ok | |