| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Ed Fitzgerald,Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| MP268 ICRF Commissioning. Wukitch/Irby/Cochran/Dekow/Fitzgerald. |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:24:650PM |
| Author: To Be Determined |
| Engineering Setup for 1000824 Boronization Recovery MP268 ICRF Commissioning Session Leader: S. Wukitch Physics Operator: J. Irby Engineering Operators: B. Cochran/G. Dekow Engineering Setup: The machine should be boronized overnight with 1700 to 2000 Angstroms of boron following by as much helium ECDC as possible while stopping at 07:30. Run begins at 9:00 and ends at 17:00 Power system setup: Same as for 1000823017 (5.2 T, 1 MA inner wall diverted) Set OH1, OH2U and OH2L fizzle delays at 400ms Set TF fizzle delay at 500 ms Gas setup: B-Top 6 psi D2 Hybrid Enabled B-side lower 1 psi Argon Hybrid DISABLED B-side upper leave as is Hybrid DISABLED C-side 30 psi D2 Hybrid Enabled J-bottom leave as is Hybrid DISABLED The following Gate Valves should be ENABLED, assuming no vacuum problems: ECE, VUV For first plasma shot, load from 1000823017 (1.0 MA, 5.2 T). 1. Power testing and conditioning for D, E and J-port antennas 2. Power ramps for D, E and J 3. Power steps 4. gap, density, I, and BT scans Primary goal is to power condition the antennas. 001 no TF 002 plasma D-port 1 MW clean E-port 1 MW clean J-port ramped to 1.6 MW and then max faults next shot: retune and 100 msec overlap D and E 003 plasma D-port 1 MW clean E-port 1 MW clean J-port ramped to 1.6 MW and then max faulted at 1.35 sec next shot: retune D and increase overlap 004 plasma, early disruption 1.45 sec D-port 1.2 MW, 2 faults E-port 1.2 MW clean J-port ramped to 1.6 MW and then began faulting density is high up to 0.8 sec- marfe next shot: increase overlap of D and E 005 plasma, early disruption 1.45 sec D-port 1.2 MW, 1 faults E-port 1.2 MW clean J-port ramped to 1.5 MW and appears to be cleaning up density is still high next shot: complete overlap of D and E, lengthen pulse 006 plasma, early disruption 1.35 sec D-port 1.2 MW, clean E-port 1.2 MW clean J-port ramped to 1.5 MW but faulted more - density rises quickly during pulse next shot: reduce J-port to 1 MW 007 plasma, early disruption 1.35 sec D-port 1.2 MW, one fault E-port 1.2 MW, two fault J-port ramped to 1.0 MW cleanly next shot: reduce J-port to 0.6 MW 008 plasma D-port 1.2 MW, one fault E-port 1.2 MW, clean J-port ramped to 0.6 MW cleanly (one fault) next shot: increase overlap of D, E, andJ-port raise J-port power to 800 kW 009 plasma, early disruption 1.23 sec D-port 1.2 MW, clean E-port 1.2 MW, faulted J-port ramped to 0.8 MW cleanly (one fault) next shot: repeat with retune of E-port minus the disruption 010 plasma, early disruption 1.1 sec D-port 1.2 MW, clean E-port 1.2 MW, faulted J-port ramped to 0.8 MW cleanly (one fault) next shot: overlap D, E, and J 011 no shot 012 no shot 013 plasma D-port 1.2 MW, 3 faults E-port 1.2 MW, max faulted after initial start - mistuned? J-port ran without fault 0.6 MW next shot: right gap to 1.5 cm from 2 cm increase J-port power to 0.6 MW 014 plasma D-port 1.2 MW, 1 faults E-port 1.2 MW, faulted J-port ran without fault 0.6 MW 015 plasma D-port 1.2 MW, faulted E-port 1.2 MW, 3 faulted J-port ran @ 0.6 MW next shot: 0.8 MW from J 016 plasma D-port 1.2 MW, clean E-port 1.2 MW, faulted late J-port ran @ 0.8 MW faulted late FMIT#2 screen xbarred late on RF trip next shot: 1.2 MW from J 017 plasma, early disruption 1.1 sec D-port 1.2 MW, clean E-port 1.2 MW, one fault J-port ran @ 1.2 MW with faults on J3 next shot: 1.0 MW from J 018 plasma, early disruption 1.1 sec D-port 1.2 MW, 2 faults E-port 1.2 MW, clean J-port ran @ 1.2 MW with faults on J3 FMIT#2 screen xbarred on disruption next shot: keeping total RF power constant increase J-port and decrease D and E-port power 019 plasma, early disruption 0.8 sec D-port 1.2 MW E-port 1.2 MW J-port ran @ 1.2 MW with faults no particular injection seen on J-port camera view next shot: delay RF by 0.1 sec and go to diverted plasmas 020 plasma, early disruption 0.8 sec D-port 1.0 MW E-port 1.0 MW J-port ran @ 1.2 MW next shot: half power on J with constant total power 021 plasma, early disruption 0.71 sec FMIT#2 screen xbarred at disruption next shot: lower total power 022 plasma, early disruption ~0.7 sec total PRF ~2.2 MW next shot: no RF 023 plasma (full length) next shot: 1 MW from D-port 024 plasma (full length) 1 MW from D-port next shot: add another 0.6 MW from J-port increase target density to 1x10^20 025 plasma for 0.68 seconds ---- raising density was a bad idea? next shot: decrease target density to .8x10^20 026 plasma (full length) 1.6 MW total RF Summary: We had a number of discharges disrupt early. There appeared to be no clear indication that one antenna was responsible. Camera views of D-port are quiet the entire day and J-port was more active but did not appear to consistently correspond to disruptions. We suspect that the input power is not being absorbed in the core because of the high H/D ratio, but is absorbed parasitically near the plasma edge resulting in impurity production. The power limit appeared to decrease over the course of the day. D and E-port power conditioning is nearly complete. We need lower H/D to make further progress with them. J-port is improving steadily and would benefit from further power conditioning discharges. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:11:787PM |
| Author: To Be Determined |
| Physics Operators Summary for 1000824 MP268 ICRF Commissioning Session Leader : S. Wukitch Physics Operator : J. Irby Engineering Operators: B. Cochran, G. Dekow, E Fitzgerald Engineering Setup: We were not able to boronize the machine last night because of a problem with the piezo valve. Overnight ECDC in D2 at 2e-4 Torr was done instead Run began at 9:30 and ended at 17:00 Power system setup: Same as for 1000823017 (5.2 T, 1 MA inner wall diverted) Set OH1, OH2U and OH2L fizzle delays at 400ms Set TF fizzle delay at 500 ms Gas setup: B-Top 6 psi D2 Hybrid Enabled B-side lower 1 psi Argon Hybrid DISABLED B-side upper leave as is Hybrid DISABLED C-side 30 psi D2 Hybrid Enabled J-bottom leave as is Hybrid DISABLED The following Gate Valves should be ENABLED, assuming no vacuum problems: ECE, VUV Summary: Machine ran extremely well today. We made no changes to the startup from yesterday and got 100% startup reliability. The RF was able to couple in over 3.2 MW of power from D, E, and J, but very high H/D ratios limited our ability to heat. The RF also caused early disruptions on many shots today. We turned off the RF power on shot 23 to verify that the RF was causing this problem and got a full length plasma discharge. On shot 24, 1 MW of RF power was okay and we got another full length plasma. It should be pointed out that the RF pulses were very clean today, with few interrupts. One hopes that we can do this well when we get the hydrogen fraction down again. On shot 25, we raised the density and the RF power and lost the plasma early. Shot 26, the last shot of the day, was at the lower density, 1.5 MW of RF from D and J, and full length. H/D generally seemed to be improving through out the day, but was still around 36% on the last shot. Problems: Had a cluster hangup before run caused by some sort of login problem with Claret. TF did not run on first shot. TF, OH, and EF1s did not run on shot following an ACK failure. Score: plasmas 23 ACK failure 01 PS glitches 02 shot cycles 26 Details: ---------------------------------------------------------------------------- 1000824xxx irby PHYSICS_OPERATOR Aug 24 2000 8:24:14:230AM . . . . . . . . . . . . . . . . . . . . We were unable to boronize last night because of problems with the piezo valve probably caused by another problem with the primary diborane regulator. We did ECDC in D2 at 2.e-4 Torr overnight. Loaded shot 1000823017 Did coldstart of hybrid rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 24-AUG-2000 07:54:33.29 doing TCL current bz0 offset is +0.0005 T ef4 pre-program at -1292.00 A Ip at 800 kA Pre-puff from -0.520 to -0.500 s ---------------------------------------------------------------------------- 1000824xxx irby PHYSICS_OPERATOR Aug 24 2000 9:26:40:873AM . . . . . . . . . . . . . . . . . . . . Cluster hang again. Seems to be highly correlated to Bob Granetz logging into Claret. Took "extra" time to secure diborane bottle in cell for installation of new regulator. ---------------------------------------------------------------------------- 1000824001 wolfe PHYSICS_OPERATOR Aug 24 2000 9:33:02:530AM . . . . . . . . . . . . . . . . . . . . Wolfe taking over for Irby for half an hour. Shot #1 loaded by Irby. No plasma, no TF. Next shot: try that again. ---------------------------------------------------------------------------- 1000824002 wolfe PHYSICS_OPERATOR Aug 24 2000 9:58:25:903AM . . . . . . . . . . . . . . . . . . . . shot#2: No obvious faults. Just try it again. plasma, full length>1.9sec D&E went ok, some faulting on J3 and 4. bolo's see the RF pulses at 400kW (diode). Early breakdown, good burnout, CII .003 fast current rise. br about .5mT negative. H/D rises from .1 to .3 during the pulse. Next shot: reduce nl4 from 9e19 to 8e19 (we got 1e20) ---------------------------------------------------------------------------- 1000824002 wolfe PHYSICS_OPERATOR Aug 24 2000 10:02:21:670AM . . . . . . . . . . . . . . . . . . . . shot#3: reduce nl4 from 9e19 to 8e19 I just noticed that f08 reports a baseline offset, and it looks like it may have died on shot#2. We may have a problem. ---------------------------------------------------------------------------- 1000824004 irby PHYSICS_OPERATOR Aug 24 2000 10:28:05:716AM . . . . . . . . . . . . . . . . . . . . Steve has given control back to me Last shot looked good, RF guys are happy H/D looks much better than yesterday No PCS changes for this shot Good shot except density rises for no clear reason around 300 to 400 ms Asked that AB limiter D2 puff be disabled. Also noted that the CII levels have been going up on each shot, last shot .006 or so. Sanjay checked/verified that no C2D6 puffing was enabled ---------------------------------------------------------------------------- 1000824005 irby PHYSICS_OPERATOR Aug 24 2000 10:44:36:653AM . . . . . . . . . . . . . . . . . . . . No PCS changes --- may need to make changes on next shot to fix MARFE Good shot, but density still higher than programmed ---------------------------------------------------------------------------- 1000824006 irby PHYSICS_OPERATOR Aug 24 2000 11:05:04:936AM . . . . . . . . . . . . . . . . . . . . Dropped early pre-programmed gas (2nd point) from 80 to 60 volts. Still have 80 volt peak voltage. Plasma to 1.23 s Density may be a little more in control Hydrogen fraction back up as high as yesterday; 50% or so Still have MARFE Steve Wolfe suggests disruptions are j-port related Clear that AB limiter puffing was not affecting the density --- will be back on for the next shot ---------------------------------------------------------------------------- 1000824007 irby PHYSICS_OPERATOR Aug 24 2000 11:22:33:733AM . . . . . . . . . . . . . . . . . . . . Dropped IP to 800 kA --- reduce disruption effects Plasma again to 1.2 s --- will reduce j-port power next shot ---------------------------------------------------------------------------- 1000824008 irby PHYSICS_OPERATOR Aug 24 2000 11:43:27:730AM . . . . . . . . . . . . . . . . . . . . Enabled b-side lower for argon from 0.35 to 0.375 s RF guys reducing j-port power to see it it's causing the disruptions Plasma to 1.88 s ---- MARFE better still ---------------------------------------------------------------------------- 1000824009 irby PHYSICS_OPERATOR Aug 24 2000 12:09:53:966PM . . . . . . . . . . . . . . . . . . . . No changes to PCS Plasma for only 1.23 s --- j-port power up 200kW? problem with flux loop again: \mag_flux_partial.signals:f08 has a baseline offset -1.3E-03 ---------------------------------------------------------------------------- 1000824010 irby PHYSICS_OPERATOR Aug 24 2000 12:29:13:250PM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma to 1.09 s ---- Steve will modify RF timing next shot, but doubts that's our problem Sam Pierson verifies that we have no hydrogen (assuming proper labeling) in the gas system ---- h/(h+d) is abt 40% Bob and Steve claim material from j-port antenna caused disruption ---------------------------------------------------------------------------- 1000824011 irby PHYSICS_OPERATOR Aug 24 2000 12:37:31:560PM . . . . . . . . . . . . . . . . . . . . Increased clearin from -0.026 to -0.020 for most of shot ACK failure --- no shot EO switch from Bill to Gary ---------------------------------------------------------------------------- 1000824012 irby PHYSICS_OPERATOR Aug 24 2000 12:48:31:106PM . . . . . . . . . . . . . . . . . . . . Try shot 11 again No OH1, EF1s, or TF?? ---------------------------------------------------------------------------- 1000824013 irby PHYSICS_OPERATOR Aug 24 2000 1:11:50:123PM . . . . . . . . . . . . . . . . . . . . Plasma for 1.88 s Moved off the wall a little, but need a little more clearin adjustment H/(H+D) down a little to 30-35% ---------------------------------------------------------------------------- 1000824014 irby PHYSICS_OPERATOR Aug 24 2000 1:43:14:310PM . . . . . . . . . . . . . . . . . . . . Increased clearin a little before 400 ms, still had a little wall interaction on last shot. Increased RCUR from 0.6610 to 0.6635 to decrease outer gap by .005 m for RF group. Plasma for 1.82 s ---------------------------------------------------------------------------- 1000824015 irby PHYSICS_OPERATOR Aug 24 2000 1:53:14:450PM . . . . . . . . . . . . . . . . . . . . No PCS changes RF retunes E and hopes for best -------------------- Plasma for 1.83 s E port looks better ---------------------------------------------------------------------------- 1000824016 irby PHYSICS_OPERATOR Aug 24 2000 2:16:23:733PM . . . . . . . . . . . . . . . . . . . . No PCS changes Steve plans to increase RF pulse width to help clean things up a little -------------- Plasma for 1.72 s RF at 3MW level for over 0.6 s! H/(H+D) still at 40% --- goes from 25 to 40% will RF power applied Carbon II at 0.006 --- steady all day ---------------------------------------------------------------------------- 1000824017 irby PHYSICS_OPERATOR Aug 24 2000 2:29:22:200PM . . . . . . . . . . . . . . . . . . . . No PCS changes plasma for 1.11 s --- brick or two at .917 ---------------------------------------------------------------------------- 1000824018 irby PHYSICS_OPERATOR Aug 24 2000 2:57:31:030PM . . . . . . . . . . . . . . . . . . . . No changes Plasma for 1.2 s 3.2 MW RF Lots of hydrogen ---------------------------------------------------------------------------- 1000824019 irby PHYSICS_OPERATOR Aug 24 2000 3:07:14:310PM . . . . . . . . . . . . . . . . . . . . No PCS changes IGT before shot at 1.6e-6 plasma for 0.787 s --- lots of radiation ramping up with RF ---------------------------------------------------------------------------- 1000824020 irby PHYSICS_OPERATOR Aug 24 2000 3:27:24:890PM . . . . . . . . . . . . . . . . . . . . Clearin from -.020 to 0.015 m Steve is delaying RF turnon a little until we get off the wall and plasma settles down plasma for 0.80 s --- we will turn off j-port antenna for the next shot Did manage to increase inner gap a little to 0.013 m ---------------------------------------------------------------------------- 1000824021 irby PHYSICS_OPERATOR Aug 24 2000 3:45:18:200PM . . . . . . . . . . . . . . . . . . . . Increased br0 offset from 0.0005 to 0.00075 T to counteract a drift in br0 seen over the last few shots Steve has reduced j-port power but increase D and E Plasma for 0.7 s! ---------------------------------------------------------------------------- 1000824022 irby PHYSICS_OPERATOR Aug 24 2000 3:56:00:310PM . . . . . . . . . . . . . . . . . . . . Dropped RF power by 30% or so plasma for 0.747 s ---- RF will be off on next shot ---------------------------------------------------------------------------- 1000824023 irby PHYSICS_OPERATOR Aug 24 2000 4:15:06:076PM . . . . . . . . . . . . . . . . . . . . No RF power plasma for 1.75 s --- time to blame RF --- low power RF on next shot John Rice reports no moly at all on this shot ---------------------------------------------------------------------------- 1000824024 irby PHYSICS_OPERATOR Aug 24 2000 4:34:08:826PM . . . . . . . . . . . . . . . . . . . . Repeat with a little RF plasma for 1.88 s --- 1 MW of RF; all D-port H/D about 36% ---------------------------------------------------------------------------- 1000824025 irby PHYSICS_OPERATOR Aug 24 2000 4:59:57:966PM . . . . . . . . . . . . . . . . . . . . Raised density request from 8e19 to 1.e20 plasma for 0.68 seconds ---- raising density was a bad idea? ---------------------------------------------------------------------------- 1000824026 irby PHYSICS_OPERATOR Aug 24 2000 5:18:02:843PM . . . . . . . . . . . . . . . . . . . . reloaded shot 23 plasma to 1.88 s --- 1.5 MW |
| Session Leader Comments | |||
| Aug 24 2000 10:17:40:750AM | 1000824001 | Steve Wukitch | 001 no TF |
| Aug 24 2000 10:18:48:123AM | 1000824002 | Steve Wukitch | 002 plasma D-port 1 MW clean E-port 1 MW clean J-port ramped to 1.6 MW and then max faults next shot: retune and 100 msec overlap D and E |
| Aug 24 2000 10:19:04:967AM | 1000824003 | Steve Wukitch | 003 plasma D-port 1 MW clean E-port 1 MW clean J-port ramped to 1.6 MW and then max faulted at 1.35 sec next shot: retune D and increase overlap |
| Aug 24 2000 10:30:53:500AM | 1000824004 | Steve Wukitch | 004 plasma, early disruption 1.45 sec D-port 1.2 MW, 2 faults E-port 1.2 MW clean J-port ramped to 1.6 MW and then began faulting density is high up to 0.8 sec- marfe next shot: retune D and increase overlap |
| Aug 24 2000 10:54:17:327AM | 1000824005 | Steve Wukitch | 005 plasma, early disruption 1.45 sec D-port 1.2 MW, 1 faults E-port 1.2 MW clean J-port ramped to 1.5 MW and appears to be cleaning up density is still high next shot: complete overlap of D and E, lengthen pulse |
| Aug 24 2000 11:04:49:077AM | 1000824006 | Steve Wukitch | 006 plasma, early disruption 1.35 sec D-port 1.2 MW, clean E-port 1.2 MW clean J-port ramped to 1.5 MW but faulted more - density rises quickly during pulse next shot: reduce J-port to 1 MW |
| Aug 24 2000 11:16:59:920AM | 1000824007 | Steve Wukitch | 007 plasma, early disruption 1.35 sec D-port 1.2 MW, one fault E-port 1.2 MW, two fault J-port ramped to 1.0 MW cleanly next shot: reduce J-port to 0.6 MW |
| Aug 24 2000 11:43:59:000AM | 1000824008 | Steve Wukitch | 008 plasma D-port 1.2 MW, one fault E-port 1.2 MW, clean J-port ramped to 0.6 MW cleanly (one fault) next shot: increase overlap of D, E, andJ-port raise J-port power to 800 kW |
| Aug 24 2000 12:10:38:607PM | 1000824009 | Steve Wukitch | 009 plasma, early disruption 1.23 sec D-port 1.2 MW, clean E-port 1.2 MW, faulted J-port ramped to 0.8 MW cleanly (one fault) next shot: repeat with retune of E-port minus the disruption |
| Aug 24 2000 12:26:11:357PM | 1000824010 | Steve Wukitch | 010 plasma, early disruption 1.1 sec D-port 1.2 MW, clean E-port 1.2 MW, clean J-port ramped to 0.8 MW clean next shot: J-port first then D and E |
| Aug 24 2000 12:48:19:390PM | 1000824011 | Steve Wukitch | 011 no shot |
| Aug 24 2000 12:48:55:920PM | 1000824012 | Steve Wukitch | 012 no shot |
| Aug 24 2000 01:12:08:000PM | 1000824013 | Steve Wukitch | 013 plasma D-port 1.2 MW, 3 faults E-port 1.2 MW, max faulted after initial start - mistuned? J-port ran without fault 0.6 MW next shot: right gap to 1.5 cm from 2 cm increase J-port power to 0.8 MW |
| Aug 24 2000 01:45:02:187PM | 1000824014 | Steve Wukitch | 014 plasma D-port 1.2 MW, 1 faults E-port 1.2 MW, faulted J-port ran without fault 0.6 MW |
| Aug 24 2000 02:28:35:233PM | 1000824015 | Steve Wukitch | 015 plasma D-port 1.2 MW, faulted E-port 1.2 MW, 3 faulted J-port ran @ 0.6 MW next shot: 0.8 MW from J |
| Aug 24 2000 02:31:19:843PM | 1000824016 | Steve Wukitch | 016 plasma D-port 1.2 MW, clean E-port 1.2 MW, faulted late J-port ran @ 0.8 MW faulted late FMIT#2 screen xbarred late on RF trip next shot: 1.2 MW from J |
| Aug 24 2000 02:41:13:530PM | 1000824017 | Steve Wukitch | 017 plasma, early disruption 1.1 sec D-port 1.2 MW, clean E-port 1.2 MW, one fault J-port ran @ 1.2 MW with faults on J3 next shot: 1.0 MW from J |
| Aug 24 2000 03:09:30:373PM | 1000824019 | Steve Wukitch | 019 plasma, early disruption 0.8 sec D-port 1.2 MW E-port 1.2 MW J-port ran @ 1.2 MW with faults no particular injection seen on J-port camera view next shot: delay RF by 0.1 sec and go to diverted plasmas |
| Aug 24 2000 03:22:29:670PM | 1000824020 | Steve Wukitch | 020 plasma, early disruption 0.8 sec D-port 1.0 MW E-port 1.0 MW J-port ran @ 1.2 MW next shot: half power on J with constant total power |
| Aug 24 2000 04:11:17:530PM | 1000824022 | Steve Wukitch | 022 plasma, early disruption ~0.7 sec total PRF ~2.2 MW next shot: no RF |
| Aug 24 2000 04:12:11:997PM | 1000824023 | Steve Wukitch | 023 plasma (full length) |
| Aug 24 2000 04:33:25:890PM | 1000824024 | Steve Wukitch | 024 plasma (full length) 1 MW from D-port next shot: add another 0.6 MW from J-port increase target density to 1x10^20 |
| Aug 25 2000 08:49:10:280AM | 1000824025 | Steve Wukitch | 025 early disruption (0.68 sec) next shot: decrease target density |
| Aug 25 2000 08:49:25:593AM | 1000824026 | Steve Wukitch | 026 plasma (full length) 1.6 MW total RF |
| Physics Operator Comments | |||
| Aug 24 2000 08:24:14:230AM | Jim Irby | We were unable to boronize last night because of problems with the piezo valve probably caused by another problem with the primary diborane regulator. We did ECDC in D2 at 2.e-4 Torr overnight. Loaded shot 1000823017 Did coldstart of hybrid rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 24-AUG-2000 07:54:33.29 doing TCL current bz0 offset is +0.0005 T ef4 pre-program at -1292.00 A Ip at 800 kA Pre-puff from -0.520 to -0.500 s | |
| Aug 24 2000 09:26:40:873AM | Jim Irby | Cluster hang again. Seems to be highly correlated to Bob Granetz logging into Claret. Took "extra" time to secure diborane bottle in cell for installation of new regulator. | |
| Aug 24 2000 09:33:02:530AM | 1000824001 | Steve Wolfe | Wolfe taking over for Irby for half an hour. Shot #1 loaded by Irby. No plasma, no TF. Next shot: try that again. |
| Aug 24 2000 09:58:25:903AM | 1000824002 | Steve Wolfe | shot#2: No obvious faults. Just try it again. plasma, full length>1.9sec D&E went ok, some faulting on J3 and 4. bolo's see the RF pulses at 400kW (diode). Early breakdown, good burnout, CII .003 fast current rise. br about .5mT negative. H/D rises from .1 to .3 during the pulse. Next shot: reduce nl4 from 9e19 to 8e19 (we got 1e20) |
| Aug 24 2000 10:02:21:670AM | 1000824002 | Steve Wolfe | shot#3: reduce nl4 from 9e19 to 8e19 I just noticed that f08 reports a baseline offset, and it looks like it may have died on shot#2. We may have a problem. |
| Aug 24 2000 10:28:05:717AM | 1000824004 | Jim Irby | Steve has given control back to me Last shot looked good, RF guys are happy H/D looks much better than yesterday No PCS changes for this shot Good shot except density rises for no clear reason around 300 to 400 ms Asked that AB limiter D2 puff be disabled. Also noted that the CII levels have been going up on each shot, last shot .006 or so. Sanjay checked/verified that no C2D6 puffing was enabled Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.3107 -13.2815 -28.8691 -109.2881 dIp/dt (kA/ms): -1.3988 -3.0531 -3.6900 -6.7408 pressure (mTorr): 0.0603 0.0653 0.0610 0.0533 Bz0 (mT): -2.7196 -0.6154 1.0051 20.0184 Br0 (mT): -0.1518 -0.6692 -1.5291 -2.7587 |
| Aug 24 2000 10:44:36:653AM | 1000824005 | Jim Irby | No PCS changes --- may need to make changes on next shot to fix MARFE Good shot, but density still higher than programmed Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.3561 -13.3042 -28.8691 -111.9049 dIp/dt (kA/ms): -1.6542 -3.0508 -3.6889 -7.1223 pressure (mTorr): 0.0603 0.0603 0.0631 0.0545 Bz0 (mT): -3.1387 -1.2075 0.1911 19.4809 Br0 (mT): -0.0365 -0.5379 -0.8729 -2.1827 |
| Aug 24 2000 11:05:04:937AM | 1000824006 | Jim Irby | Dropped early pre-programmed gas (2nd point) from 80 to 60 volts. Still have 80 volt peak voltage. Plasma to 1.23 s Density may be a little more in control Hydrogen fraction back up as high as yesterday; 50% or so Still have MARFE Steve Wolfe suggests disruptions are j-port related Clear that AB limiter puffing was not affecting the density --- will be back on for the next shot |
| Aug 24 2000 11:22:33:733AM | 1000824007 | Jim Irby | Dropped IP to 800 kA --- reduce disruption effects Plasma again to 1.2 s --- will reduce j-port power next shot Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2608 -10.7327 -26.2977 -101.5510 dIp/dt (kA/ms): -1.1467 -3.0542 -3.3040 -6.7397 pressure (mTorr): 0.0638 0.0631 0.0638 0.0558 Bz0 (mT): -3.0120 -0.4790 1.2212 18.6862 Br0 (mT): -0.0591 -0.7735 -0.7822 -2.6995 |
| Aug 24 2000 11:43:27:730AM | 1000824008 | Jim Irby | Enabled b-side lower for argon from 0.35 to 0.375 s RF guys reducing j-port power to see it it's causing the disruptions Plasma to 1.88 s ---- MARFE better still |
| Aug 24 2000 12:09:53:967PM | 1000824009 | Jim Irby | No changes to PCS Plasma for only 1.23 s --- j-port power up 200kW? problem with flux loop again: \mag_flux_partial.signals:f08 has a baseline offset -1.3E-03 |
| Aug 24 2000 12:29:13:250PM | 1000824010 | Jim Irby | No PCS changes Plasma to 1.09 s ---- Steve will modify RF timing next shot, but doubts that's our problem Sam Pierson verifies that we have no hydrogen (asuming proper labeling) in the gas system ---- h/(h+d) is abt 40% Bob and Steve claim material from j-port antenna caused disruption Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): 2.2608 -10.7100 -28.8918 -104.1452 dIp/dt (kA/ms): -1.2716 -3.0542 -3.3085 -6.4888 pressure (mTorr): 0.0631 0.0624 0.0638 0.0558 Bz0 (mT): -3.3132 -0.3213 0.8266 19.4775 Br0 (mT): -0.5936 -0.7319 -0.9698 -2.7435 |
| Aug 24 2000 12:37:31:560PM | 1000824011 | Jim Irby | Increased clearin from -0.026 to -0.020 for most of shot ACK failure --- no shot EO switch from Bill to Gary |
| Aug 24 2000 12:48:31:107PM | 1000824012 | Jim Irby | Try shot 11 again No OH1, EF1s, or TF?? |
| Aug 24 2000 01:11:50:123PM | 1000824013 | Jim Irby | Plasma for 1.88 s Moved off the wall a little, but need a little more clearin adjustment H/(H+D) down a little to 30-35% |
| Aug 24 2000 01:43:14:310PM | 1000824014 | Jim Irby | Increased clearin a little before 400 ms, still had a little wall interaction on last shot. Increased RCUR from 0.6610 to 0.6635 to decrease outer gap by .005 m for RF group. Plasma for 1.82 s |
| Aug 24 2000 01:53:14:450PM | 1000824015 | Jim Irby | No PCS changes RF retunes E and hopes for best -------------------- Plasma for 1.83 s E port looks better |
| Aug 24 2000 02:16:23:733PM | 1000824016 | Jim Irby | No PCS changes Steve plans to increase RF pulse width to help clean things up a little -------------- Plasma for 1.72 s RF at 3MW level for over 0.6 s! H/(H+D) still at 40% --- goes from 25 to 40% will RF power applied Carbon II at 0.006 --- steady all day |
| Aug 24 2000 02:29:22:200PM | 1000824017 | Jim Irby | No PCS changes plasma for 1.11 s --- brick or two at .917 |
| Aug 24 2000 02:57:31:030PM | 1000824018 | Jim Irby | No changes Plasma for 1.2 s 3.2 MW RF Lots of hydrogen |
| Aug 24 2000 03:07:14:310PM | 1000824019 | Jim Irby | No PCS changes IGT before shot at 1.6e-6 plasma for 0.787 s --- lots of radiation ramping up with RF |
| Aug 24 2000 03:27:24:890PM | 1000824020 | Jim Irby | Clearin from -.020 to 0.015 m Steve is delaying RF turnon a little until we get off the wall and plasma settles down plasma for 0.80 s --- we will turn off j-port antenna for the next shot Did manage to increase inner gap a little to 0.013 m |
| Aug 24 2000 03:45:18:200PM | 1000824021 | Jim Irby | Increased br0 offset from 0.0005 to 0.00075 T to counteract a drift in br0 seen over the last few shots Steve has reduced j-port power but increase D and E Plasma for 0.7 s! |
| Aug 24 2000 03:56:00:310PM | 1000824022 | Jim Irby | Dropped RF power by 30% or so plasma for 0.747 s ---- RF will be off on next shot |
| Aug 24 2000 04:15:06:077PM | 1000824023 | Jim Irby | No RF power plasma for 1.75 s --- time to blame RF --- low power RF on next shot John Rice reports no moly at all on this shot |
| Aug 24 2000 04:34:08:827PM | 1000824024 | Jim Irby | Repeat with a little RF plasma for 1.88 s --- 1 MW of RF; all D-port H/D about 36% |
| Aug 24 2000 04:59:57:967PM | 1000824025 | Jim Irby | Raised density request from 8e19 to 1.e20 plasma for 0.68 seconds ---- raising density was a bad idea? |
| Aug 24 2000 05:18:02:843PM | 1000824026 | Jim Irby | reloaded shot 23 plasma to 1.88 s --- 1.5 MW |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:29:46:357AM | Plasma | Bad | TF did not fire |
| 2 | 09:44:34:950AM | Plasma | Ok | |
| 3 | 10:02:43:030AM | Plasma | Ok | |
| 4 | 10:16:20:797AM | Plasma | Ok | |
| 5 | 10:31:32:733AM | Plasma | Ok | |
| 6 | 10:53:47:000AM | Plasma | Ok | |
| 7 | 11:11:21:763AM | Plasma | Ok | |
| 8 | 11:32:15:013AM | Plasma | Ok | |
| 9 | 11:55:06:700AM | Plasma | Ok | |
| 10 | 12:11:25:373PM | Plasma | Ok | |
| 11 | 12:33:35:140PM | Plasma | Bad | Ack Failure during pulse state |
| 12 | 12:42:21:640PM | Plasma | Bad | No EF1, OH1 or TF |
| 13 | 12:56:06:310PM | Plasma | Ok | |
| 14 | 01:22:37:530PM | Plasma | Ok | |
| 15 | 01:44:49:107PM | Plasma | Ok | |
| 16 | 01:58:48:750PM | Plasma | Ok | |
| 17 | 02:16:05:640PM | Plasma | Ok | |
| 18 | 02:40:59:280PM | Plasma | Ok | |
| 19 | 02:59:16:873PM | Plasma | Ok | |
| 20 | 03:15:57:717PM | Plasma | Ok | |
| 21 | 03:30:49:997PM | Plasma | Ok | |
| 22 | 03:52:55:327PM | Plasma | Ok | |
| 23 | 04:06:50:187PM | Plasma | Ok | |
| 24 | 04:24:36:653PM | Plasma | Ok | |
| 25 | 04:46:06:357PM | Plasma | Ok | |
| 26 | 05:04:00:217PM | Plasma | Ok | |