| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Yijun Lin |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Ed Fitzgerald,Gary Dekow |
| Engineering Operator Run Comment |
| Continuation of RF Conditioning; SL: Lin; PO:Wolfe; EO:Dekow/Fitzgerald |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:29:647PM |
| Author: To Be Determined |
| Summary: RF conditioning It is a good run day overall. D and E can ran clean at 1.2 MW into H-modes. At higher power level, they are still tripped out. Here is the story on J: We were supposed to run the antenna at the dipole phase, and it was supposed to heat plasma. After shot 20, Earl pointed out there was no heating at all from J antenna even with 1.6 MW input. He suspected the J antenna was running at the monopole phase. On shot 22, we tried Bt=4.5 Tesla to move J resonance to the center. There was still no heating power. I shifted the digital phase setpoint by 180 degrees since shot 24, and J succeeded in heating plasma and made many H-modes at 1.6 MW level. All shots from 22 to 29 are 4.5 Tesla shots. I believe the present phase setting is the correct [0,pi, 0, pi] phase setting. It also gave the same JVX phase measurement as we had in last campaign. It suggested that we have been J antenna in the wrong phase so far in this campaign. On 1020801, the J antenna phase feedback system was changed to speed up the phase lock time (now 15 ms). From the RF operational point of view, it requires a soft startup with a low power period longer than 15 ms. This is a challenge on retries after a fault. We have also substantially slow down the retry. However, as evident in shot 29, the present retry circuit still cannot work at a high J power level (2 MW). J antenna now can run at 1.6 MW with length at 200 - 300 ms without trip. More conditioning on this antenna is needed. --- shot by shot list: ---------------------------------------------------------------------------- 1020802001 ylin SESSION_LEADER Aug 2 2002 9:35:08:830AM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 30 ms ramp from 0.1 to 0.3 MW. Result: Fizzle. ---------------------------------------------------------------------------- 1020802002 ylin SESSION_LEADER Aug 2 2002 9:48:26:586AM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupted at 0.28 sec. ---------------------------------------------------------------------------- 1020802003 ylin SESSION_LEADER Aug 2 2002 10:02:57:186AM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupted at 0.42 sec ---------------------------------------------------------------------------- 1020802004 ylin SESSION_LEADER Aug 2 2002 10:16:46:800AM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 30 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with two trips, but retried successfully. D and E many trips. Next shot: retune all antennas. Same power level. ---------------------------------------------------------------------------- 1020802005 ylin SESSION_LEADER Aug 2 2002 10:46:22:126AM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 30 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.4 sec. Clean 800 kW J for 0.65 sec! D and E ran with trips. Next shot: Increase J power to 1 MW. Retune D and E. ---------------------------------------------------------------------------- 1020802006 ylin SESSION_LEADER Aug 2 2002 10:46:54:050AM . . . . . . . . . . . . . . . . . . . . Fizzle ---------------------------------------------------------------------------- 1020802007 ylin SESSION_LEADER Aug 2 2002 11:00:38:760AM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 1.2 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 0.96 sec. J ran clean for 230 ms. Then faulted out. The retries failed. ---------------------------------------------------------------------------- 1020802008 ylin SESSION_LEADER Aug 2 2002 11:38:45:426AM . . . . . . . . . . . . . . . . . . . . dud ---------------------------------------------------------------------------- 1020802009 ylin SESSION_LEADER Aug 2 2002 11:43:58:480AM . . . . . . . . . . . . . . . . . . . . Fizzle. By doubling capacitors on the modulator board, we try to slow down the retries on J so that the phase feedback can kick in before the rf power approaches the trip threshold. ---------------------------------------------------------------------------- 1020802010 ylin SESSION_LEADER Aug 2 2002 11:54:23:653AM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.2 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.06 sec. J ran (1.26 MW) with one trip, but recovered. Next shot: raise J power to 1.4 MW. ---------------------------------------------------------------------------- 1020802011 ylin SESSION_LEADER Aug 2 2002 12:06:16:726PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.4 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.33 sec. J ran with 3 trips. Revcovered nicely. Power to 1.4 MW D and E ran 150 ms. One trip on both. Next shot: Tune D and E. Same power and waveform for all. ---------------------------------------------------------------------------- 1020802012 ylin SESSION_LEADER Aug 2 2002 12:22:16:533PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.4 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 3 trips. Revcovered nicely. Power to 1.45 MW D and E ran. One trip on both. ---------------------------------------------------------------------------- 1020802013 ylin SESSION_LEADER Aug 2 2002 12:39:19:323PM . . . . . . . . . . . . . . . . . . . . Dud. ---------------------------------------------------------------------------- 1020802014 ylin SESSION_LEADER Aug 2 2002 12:46:52:150PM . . . . . . . . . . . . . . . . . . . . Plasma. disrupted at 0.2 sec ---------------------------------------------------------------------------- 1020802015 ylin SESSION_LEADER Aug 2 2002 1:02:31:593PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 4 trips. Recovered from trips. Power to 1.6 MW D and E ran with trips. ---------------------------------------------------------------------------- 1020802017 ylin SESSION_LEADER Aug 2 2002 1:35:25:863PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 4 trips. Recovered nicely. Power to 1.6 MW. D and E ran with trips. ---------------------------------------------------------------------------- 1020802018 ylin SESSION_LEADER Aug 2 2002 1:45:03:596PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 4 trips. Recovered nicely. Power to 1.6 MW D ran clean in H mode. E with 2 trips. Next shot: Raise D power to 1.3 MW ---------------------------------------------------------------------------- 1020802019 ylin SESSION_LEADER Aug 2 2002 2:04:26:830PM . . . . . . . . . . . . . . . . . . . . fizzle ---------------------------------------------------------------------------- 1020802020 ylin SESSION_LEADER Aug 2 2002 2:14:54:236PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D ran clean in H mode. E with many trips. J longer at 1.6 MW. Next shot: Raise D power to 1.4 MW. Reduce E to 1.0 MW to let run through. ---------------------------------------------------------------------------- 1020802022 ylin SESSION_LEADER Aug 2 2002 2:52:28:263PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.4 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D, E, J ran with trips. Still no evidence of J heating. Next shot: Change digital phase to 45 degree ---> I will get 0 from JVX phase measurement. To see whether now it is in [0, pi, 0, pi] configuration. ---------------------------------------------------------------------------- 1020802023 ylin SESSION_LEADER Aug 2 2002 3:02:54:356PM . . . . . . . . . . . . . . . . . . . . shot 1020802023: fizzle ---------------------------------------------------------------------------- 1020802024 ylin SESSION_LEADER Aug 2 2002 3:32:22:840PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.4 MW, [1.2, 1.5] sec E: 1.0 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J heated and J caused H-modes. JVX phase = 0.0 D ran with trips. E ran clean. Tune stub tuner and phase shifter of J, D, and E. Raise E to 1.2 MW. Note: H-modes from J! I believe to get [0,pi,0,pi] heating, I should set the digital phase to be 45 degrees and make measured JVX phase = 0.0 ---------------------------------------------------------------------------- 1020802025 ylin SESSION_LEADER Aug 2 2002 3:37:03:206PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.4 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. Many H-modes. D ran with trips. E ran clean. J with trips. Tune stub tuner and phase shifter of J, D, and E. Next shot: run D, E, J together. reduce D power to 1.3 MW. ---------------------------------------------------------------------------- 1020802026 ylin SESSION_LEADER Aug 2 2002 4:10:48:710PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [0.9, 1.5] sec E: 1.3 MW. [0.9, 1.5] sec J: 1.6 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: Ran with multi trips. E: Ran with multi trips J: ran with multi-trips. Faulted out after D and E are on. Next shot: move D and E to [1.0, 1.5] sec ---------------------------------------------------------------------------- 1020802027 ylin SESSION_LEADER Aug 2 2002 4:28:12:206PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.0, 1.5] sec E: 1.3 MW. [1.0, 1.5] sec J: 1.6 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: Ran. clean E: Ran multi trips J: ran multitrips. Faulted out after 1.0 sec. ---------------------------------------------------------------------------- 1020802028 ylin SESSION_LEADER Aug 2 2002 4:55:01:966PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [.8, 1.5] sec E: 1.3 MW. [.8, 1.5] sec J: ramp 1.2 to 1.6 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: ran with trips. E: ran with trips. J: ran with trips. ---------------------------------------------------------------------------- 1020802029 ylin SESSION_LEADER Aug 2 2002 5:15:30:826PM . . . . . . . . . . . . . . . . . . . . Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.0, 1.5] sec E: 1.3 MW. [1.0, 1.5] sec J: 2.0 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: ran with several trips E: ran with several trips J: ran. Retry failed. End of run. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:15:537PM |
| Author: To Be Determined |
| Physics Operator Summary for Friday 2-AUG-2002 RF Conditioning SL: Lin PO: Wolfe EO: Dekow,Fitzgerald Run Plan: --------- Run to begin at 9:00 AM (possibly 9:30) ECDC from 06:00-07:00 at 2e-4 T D2. Power systems setup the same as for Shot 1020731019 Gas setup: B-Top 6 psi D2 Hybrid Enabled (PG4) B-side lower 1 psi Ar Hybrid Enabled (PG1) B-side upper 10 psi D2 Hybrid DISABLED (PG2, for ECDC) C-Side 30 psi D2 Hybrid Enabled (PG3) J-Bottom leave as is, Hybrid DISABLED Enable the following gate valves, assuming no vacuum problems: ECE,VUV,DNB RF Setup: All 4 transmitters in Run On by 07:00 Run Plan: Continue RF Conditioning of all antennas. We will start with single null shot like 1020731019. The goal is to get J-port conditioned up to useable power, and continue conditioning of D- and E-port. Results: -------- RF Group re-worked the J-port phase control to allow faster locking, and slowed down the retry circuit to allow phase to lock before raising the power. We did 10min of ecdc before the first shot, since there had been J-port conditioning in the morning. First shot was taken at ~9:30AM. Good progress was made on Jport. The phase control and retry circuit modifications were successful in allowing multiple retries after faults. We discovered (thanks to Earl) that the phase control was being set to make it 0-0 instead of 0-pi. This was confirmed by lowering the tf to 4.5T and observing that J still did not heat at the 1.6MW power level. When the phase was changed (to "0", which is apparently really pi) J started producing H-modes, like D+E. J was conditioned up to about 1.6MW with pulse lengths of 200msec in l-mode, but once we started getting H-modes the pulse lengths were shorter. Attempts to run J simultaneously with D&E on shots 26-28 were not successful. D managed to stay on through H-mode at the 1.2MW level or so, but E tended to fault on transitions. I suggest that for the next round of conditioning we go back to limiter discharges to stay in L-mode. I did a lot of playing with the startup, but without much progress. The most robust startups had early bounces, and also led to early hard xrays from non-thermals. Attempts to increase the pre-puff and/or increase Bz (by ef4 or by rcur offset) resulted in duds or fizzles, and also late breakdowns. For shot 10 Jim raised the sparker voltage to ~14kV, but while this eventually led to some shots on which the sparker responded to the gas, it did not eliminate the duds. On shot #14 I introduced argon into the pre-puff, and left it there for the remainder of the run. There was only one dud after that, on shot 19, before which I had made change to rcur offset to try to remedy a late breakdown, and ended up with much too positive a Bz. With the argon there were some successful plasmas with amazingly late breakdowns (like 11msec). The best correlation on breakdown time was Bz, more postive making it later, more negative earlier; I ended up with IC_EF4 at -1330 to get the breakdown time back to 5.5-6.0 msec. These seemed to be robust and reproducible, but with bounces at ~13msec and early runaways. Earlier attempts to remedy this behavior by raising the puff had led to fizzles, so for the final hour or so I left it alone. The H/D ratio was fairly high all day, ~10-15%, and seemed to rise during the RF. J-port continued to spew injections, and caused numerous disruptions in the morning. As the day went on these seemed to decrease, and the last 13 plasmas lasted well into rampdown (many were terminated by Earl's Li pellets). We experienced several data system hangs late in the day. A number of these were apparently related to unix_submit jobs on unity and cmodws04. The actual analyses on the linux boxes ran successfully, but somehow the dispatch server did not think the launch had been completed. Also, on shot 28 the dispatch server suicided with a bugcheck error, causing IGOR to get a recool ready bit, although many stores had not been done. The store and analysis phases were successfully re-run manually, as had been done earlier this week. Scorecard: Duds 4 Fizzles 3 Plasmas 22 ======= == Shots 29 |
| Session Leader Comments | |||
| Aug 2 2002 09:35:08:830AM | 1020802001 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 30 ms ramp from 0.1 to 0.3 MW. Result: Fizzle. |
| Aug 2 2002 09:48:26:587AM | 1020802002 | Yijun Lin | Plasma. Disrupted at 0.28 sec. |
| Aug 2 2002 10:02:57:187AM | 1020802003 | Yijun Lin | Plasma. Disrupted at 0.42 sec |
| Aug 2 2002 10:16:46:800AM | 1020802004 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 30 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with two trips, but retried successfully. D and E many trips. Next shot: retune all antennas. Same power level. |
| Aug 2 2002 10:46:22:127AM | 1020802005 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 30 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.4 sec. Clean 800 kW J for 0.65 sec! D and E ran with trips. Next shot: Increase J power to 1 MW. Retune D and E. |
| Aug 2 2002 10:46:54:050AM | 1020802006 | Yijun Lin | Fizzle |
| Aug 2 2002 11:00:38:760AM | 1020802007 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.6] sec E: 1.2 MW. [1.2, 1.6] sec J: 1.2 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 0.96 sec. J ran clean for 230 ms. Then faulted out. The retries failed. |
| Aug 2 2002 11:38:45:427AM | 1020802008 | Yijun Lin | dud |
| Aug 2 2002 11:43:58:480AM | 1020802009 | Yijun Lin | Fizzle. By doubling capacitors on the modulator board, we try to slow down the retries on J so that the phase feedback can kick in before the rf power approaches the trip threshold. |
| Aug 2 2002 11:54:23:653AM | 1020802010 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.2 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.06 sec. J ran (1.26 MW) with one trip, but recovered. Next shot: raise J power to 1.4 MW. |
| Aug 2 2002 12:06:16:727PM | 1020802011 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.4 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.33 sec. J ran with 3 trips. Revcovered nicely. Power to 1.4 MW D and E ran 150 ms. One trip on both. Next shot: Tune D and E. Same power and waveform for all. |
| Aug 2 2002 12:22:16:533PM | 1020802012 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.4 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 3 trips. Revcovered nicely. Power to 1.45 MW D and E ran. One trip on both. |
| Aug 2 2002 12:39:19:323PM | 1020802013 | Yijun Lin | Dud. |
| Aug 2 2002 12:46:52:150PM | 1020802014 | Yijun Lin | Plasma. disrupted at 0.2 sec |
| Aug 2 2002 01:02:31:593PM | 1020802015 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 4 trips. Recovered from trips. Power to 1.6 MW D and E ran with trips. |
| Aug 2 2002 01:35:25:863PM | 1020802017 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 4 trips. Recovered nicely. Power to 1.6 MW. D and E ran with trips. |
| Aug 2 2002 01:45:03:597PM | 1020802018 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J ran with 4 trips. Recovered nicely. Power to 1.6 MW D ran clean in H mode. E with 2 trips. Next shot: Raise D power to 1.3 MW |
| Aug 2 2002 02:04:26:830PM | 1020802019 | Yijun Lin | fizzle |
| Aug 2 2002 02:14:54:237PM | 1020802020 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D ran clean in H mode. E with many trips. J longer at 1.6 MW. Next shot: Raise D power to 1.4 MW. Reduce E to 1.0 MW to let run through. |
| Aug 2 2002 02:52:28:263PM | 1020802022 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.4 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D, E, J ran with trips. Still no evidence of J heating. Next shot: Change digital phase to 45 degree ---> I will get 0 from JVX phase measurement. To see whether now it is in [0, pi, 0, pi] configuration. |
| Aug 2 2002 03:02:54:357PM | 1020802023 | Yijun Lin | shot 1020802023: fizzle |
| Aug 2 2002 03:32:22:840PM | 1020802024 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.4 MW, [1.2, 1.5] sec E: 1.0 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. J heated and J caused H-modes. JVX phase = 0.0 D ran with trips. E ran clean. Tune stub tuner and phase shifter of J, D, and E. Raise E to 1.2 MW. Note: H-modes from J! I believe to get [0,pi,0,pi] heating, I should set the digital phase to be 45 degrees and make measured JVX phase = 0.0 |
| Aug 2 2002 03:37:03:207PM | 1020802025 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.4 MW, [1.2, 1.5] sec E: 1.2 MW. [1.2, 1.5] sec J: 1.6 MW, [0.55, 1.2] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. Many H-modes. D ran with trips. E ran clean. J with trips. Tune stub tuner and phase shifter of J, D, and E. Next shot: run D, E, J together. reduce D power to 1.3 MW. |
| Aug 2 2002 04:10:48:710PM | 1020802026 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [0.9, 1.5] sec E: 1.3 MW. [0.9, 1.5] sec J: 1.6 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: Ran with multi trips. E: Ran with multi trips J: ran with multi-trips. Faulted out after D and E are on. Next shot: move D and E to [1.0, 1.5] sec |
| Aug 2 2002 04:28:12:207PM | 1020802027 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.0, 1.5] sec E: 1.3 MW. [1.0, 1.5] sec J: 1.6 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: Ran. clean E: Ran multi trips J: ran multitrips. Faulted out after 1.0 sec. |
| Aug 2 2002 04:55:01:967PM | 1020802028 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [.8, 1.5] sec E: 1.3 MW. [.8, 1.5] sec J: ramp 1.2 to 1.6 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: ran with trips. E: ran with trips. J: ran with trips. |
| Aug 2 2002 05:15:30:827PM | 1020802029 | Yijun Lin | Plasma request: SN diverted plasma. nl= 10^20 m^-3, Bt = 4.5 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.0, 1.5] sec E: 1.3 MW. [1.0, 1.5] sec J: 2.0 MW, [0.55, 1.5] sec, soft start: 25 ms ramp from 0.1 to 0.3 MW. Result: Plasma. D: ran with several trips E: ran with several trips J: ran. Retry failed. End of run. |
| Physics Operator Comments | |||
| Aug 2 2002 07:21:07:047AM | Steve Wolfe | Run Plan and Engineering Setup for Friday Aug 2, 2002 Continuation of RF Conditioning SL: Lin PO: Wolfe Run to begin at 9:00 AM (possibly 9:30) ECDC from 06:00-07:00 at 2e-4 T D2. Power systems setup the same as for Shot 1020731019 Gas setup: B-Top 6 psi D2 Hybrid Enabled (PG4) B-side lower 1 psi Ar Hybrid Enabled (PG1) B-side upper 10 psi D2 Hybrid DISABLED (PG2, for ECDC) C-Side 30 psi D2 Hybrid Enabled (PG3) J-Bottom leave as is, Hybrid DISABLED Enable the following gate valves, assuming no vacuum problems: ECE,VUV,DNB RF Setup: All 4 transmitters in Run On by 07:00 Run Plan: Continue RF Conditioning of all antennas. We will start with single null shot like 1020731019. The goal is to get J-port conditioned up to useable power, and continue conditioning of D- and E-port. | |
| Aug 2 2002 08:17:06:790AM | Steve Wolfe | Setting up PCS for Aug 2 Run. load from 1020731019. NOTE the active segment is #3 (SN) Load/Clean coldstart All matrices respond (bitbus log) All cards load, no last error message (hloader log) I wasn't too happy with the startups on 0731; Ian was making lots of wirehead changes and shot19 was sort of in the middle of them. The main changes seem to be a 100V bump on EF3 at 10msec and redrawn rcur waveforms before 10msec. The result seems to be a tendency to lower Bz and bouncers/hard xray startups. I may want to do some fiddling with this, but I'll start from the setup as on 19: rcur offset=2800 br0 offset = .002 ic_ef4=-1300 pg4 = 23msec rcur = [[-.003,.6536],[.001,.68],[.005,.645],[.010,.63],[.050,.62866]] v_ef3= [[-.003,100.],[-.001,2600],[.005,2499],[.008,2510],[.010,2600],[.012,2500],[.020,1958],[.026,2200]] | |
| Aug 2 2002 09:40:23:260AM | 1020802001 | Steve Wolfe | shot#1: 10 minutes of ecdc before the first shot, after J-port conditioning. The RF group has redone the J-port phase control to allow faster locking, and slowed down the retry circuit to allow phase to lock before raising the power. fizzle. late breakdown 7msec low current rise. gside rationmatic was at .07+ reduce gas puff to 20msec (from 23) |
| Aug 2 2002 09:52:57:373AM | 1020802002 | Steve Wolfe | shot#2: early disruption .28sec, jport spews still a late breakdown. drop Br0 to .0015 from .002 |
| Aug 2 2002 10:09:14:287AM | 1020802003 | Steve Wolfe | shot#3: drop Br0 to .0015 from .002 early disruption 418msec; jport still injecting, the last one is from the other side of the septum this time. breakdown is still late. next shot: ic_ef4 from -1300 to -1310 |
| Aug 2 2002 10:21:42:933AM | 1020802004 | Steve Wolfe | shot#4: ic_ef4 from -1300 to -1310 plasma to 2sec. J ran at 800kW, retries successful. D&E faulting. intermittant H-modes. breakdown back to 6msec; startup clean, but still a bit slow. Some early hards. J still spewing early, but it survived this time. next shot: raise pre-puff to 22msec from 20. |
| Aug 2 2002 10:38:15:443AM | 1020802005 | Steve Wolfe | shot#5: raise pre-puff to 22msec from 20. plasma to 1.39sec; another injection from J, after it's RF turns off. (seen on wide2). very late breakdown 10msec! pressure up to .07mTorr again. Leave it alone for another shot; I don't understand why it was late. |
| Aug 2 2002 10:51:58:230AM | 1020802006 | Steve Wolfe | shot#6: No PCS changes. dud - should have done something about that late breakdown. next shot: pg4 back to 20msec, ic_ef4 to -1320 |
| Aug 2 2002 11:08:35:300AM | 1020802007 | Steve Wolfe | shot#7: pg4 back to 20msec, ic_ef4 to -1320 plasma disrupts at 1 sec. J got up to 1.26MW, but tripped out. It was not on when it injected the fatal blow. bd back to 6msec; no bounce. next shot: no changes. |
| Aug 2 2002 11:13:56:387AM | 1020802008 | Steve Wolfe | shot#8: no pcs changes. dud. try five minutes of ecdc. next shot NINJA will puff Helium coming in at 1.5sec |
| Aug 2 2002 11:42:05:743AM | 1020802009 | Steve Wolfe | shot#9: try five minutes of ecdc. NINJA will puff Helium coming in at 1.5sec fizzle. Br is taking a 1mT jump down, but breakdown is back at 6msc. current rise is still slow. next shot: Jim raised sparker voltage 500->650 drop pg4 to 18msec |
| Aug 2 2002 11:54:50:030AM | 1020802010 | Steve Wolfe | shot#10: Jim raised sparker voltage 500->650 (it doesn't look like it's been coming on all day) drop pg4 to 18msec plasma to 1.07sec, looks like J injections again, but it's up to 1.25MW bouncy startup. some hards. Didn't make it to D&E. sparker still not responding at 13.7kV. next shot: No changes. |
| Aug 2 2002 12:11:59:187PM | 1020802011 | Steve Wolfe | shot#11: No changes. plasma to 1.33sec, lots of hards. bounce at the same time as shot 10, and a later breakdown 8msec J is getting up to 1.5MW, lots of re-tries on all antennas. next shot: increase pg4 to 20msec |
| Aug 2 2002 12:21:50:593PM | 1020802012 | Steve Wolfe | shot#12: increase pg4 to 20msec plasma to 1.87 sec. One burst of hards early, D&E are heating. @10msec breakdown! next shot: Br0 to .002 from .0015 |
| Aug 2 2002 12:37:38:587PM | 1020802013 | Steve Wolfe | shot#13: Br0 to .002 from .0015 dud - moved it the wrong way, I guess. yes, it jumped up, put it back to .0015. next shot: br0 to .0015, ic_ef4 to -1310 (from -1320) Copy pg4 pulse to pg1 (Argon in the pre-puff). |
| Aug 2 2002 12:49:27:387PM | 1020802014 | Steve Wolfe | shot#14: br0 to .0015, ic_ef4 to -1310 (from -1320) Copy pg4 pulse to pg1 (Argon in the pre-puff). early disruption. 190msec. bd at 8msec. next shot: ic_ef4 back to -1320 |
| Aug 2 2002 01:04:30:160PM | 1020802015 | Steve Wolfe | shot#15: ic_ef4 back to -1320 plasma to 1.9sec breakdown at 6ms, but it bounces again. next shot: No pcs changes. Earl will shoot pellet at 1.76 |
| Aug 2 2002 01:19:33:307PM | 1020802016 | Steve Wolfe | shot#16: No pcs changes. Earl did not shoot pellet at 1.76 plasma to 1.88sec, but the breakdown was very late (11msec) d+e 2.2MW, J 1.5MW next shot: rcur offset from 2800 to 3000 |
| Aug 2 2002 01:33:16:547PM | 1020802017 | Steve Wolfe | shot#17: rcur offset from 2800 to 3000 in seg1 plasma to 1.85sec, breakdown at 7.5msec, lots of early hards. J is up to 1.6MW, lots of early and late injections. next shot: rcur offset to 3200 in seg1. |
| Aug 2 2002 01:45:00:410PM | 1020802018 | Steve Wolfe | shot#18: rcur offset to 3200 in seg1 plasma to 1.86sec, breakdown at 8msec again. fewer hards J approaching 1.7MW, D+E around 2.2. next shot: rcur offset in seg1 ro 3500 |
| Aug 2 2002 02:14:31:830PM | 1020802020 | Steve Wolfe | shot#20: back to 3000 on rcur offset plasma to 1.9sec. bd at 6.5msec and one bounce. some early hards. J at 1.6MW, four retries. D good at 1.2, E faulting repeatedly next shot: no changes. |
| Aug 2 2002 02:43:10:280PM | 1020802021 | Steve Wolfe | shot#21: no changes. data acq problems. plasma lasted to 1.9sec. next shot: change tf to 4.5T |
| Aug 2 2002 02:56:49:067PM | 1020802022 | Steve Wolfe | shot#22: tf to -127000 (4.5T) to see if J will heat. plasma to 1.9sec, breakdown is later again 9msec J didn't heat, still got H-mode from D&E next shot: ef4 from -1320 to -1310 |
| Aug 2 2002 03:03:53:890PM | 1020802023 | Steve Wolfe | shot#23: ef4 from -1320 to -1310. Yijun will tune to what he thinks is monopole, and we'll see if it's really 0-pi. fizzle late breakdown 13msec went the wrong way. next shot: ef4 to -1330 |
| Aug 2 2002 03:25:58:610PM | 1020802024 | Steve Wolfe | shot#24: ef4 to -1330 plasma to 1.9 sec - looks like h-modes during J-port! breakdown back to 5.7msec - bouncy and with hards early next shot: no pcs changes. |
| Aug 2 2002 03:37:02:567PM | 1020802025 | Steve Wolfe | shot#25: no pcs changes. plasma to 1.88sec, breakdown at 5.7msec, still some bounce 5 h-modes and a pellet. next shot: Yijun will try stacking the pulses. No PCS changes. |
| Aug 2 2002 03:58:53:070PM | 1020802026 | Steve Wolfe | shot#26: Yijun will try stacking the pulses. No PCS changes. plasma to 1.87 sec. 6 hmodes and a pellet. Lots of RF, lots of RF faults. next shot: No changes. |
| Aug 2 2002 04:39:06:520PM | 1020802027 | Steve Wolfe | shot#27: No pcs changes. Lots of hards, but plasma went full length with multiple H-modes next shot: no pcs changes |
| Aug 2 2002 05:08:57:690PM | 1020802028 | Steve Wolfe | shot#28: No pcs changes. plasma to 1.78sec, lots of hmodes. |
| Aug 2 2002 05:15:09:310PM | 1020802029 | Steve Wolfe | shot#29: No pcs changes. plasma to 1.76 sec. J didn't go - requested 2MW. D+E ran at 2.4 with trips on each |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:32:01:700AM | Plasma | Ok | |
| 2 | 09:45:13:237AM | Plasma | Ok | |
| 3 | 10:00:39:993AM | Plasma | Ok | |
| 4 | 10:13:18:543AM | Plasma | Ok | |
| 5 | 10:28:39:160AM | Plasma | Ok | |
| 6 | 10:42:06:887AM | Plasma | Ok | |
| 7 | 10:55:20:453AM | Plasma | Ok | |
| 8 | 11:09:39:490AM | Plasma | Ok | |
| 9 | 11:30:54:447AM | Plasma | Ok | |
| 10 | 11:45:54:843AM | Plasma | Ok | |
| 11 | 12:00:55:240PM | Plasma | Ok | |
| 12 | 12:14:36:910PM | Plasma | Ok | |
| 13 | 12:29:54:827PM | Plasma | Ok | |
| 14 | 12:42:51:983PM | Plasma | Ok | |
| 15 | 12:55:48:927PM | Plasma | Ok | |
| 16 | 01:10:13:607PM | Plasma | Ok | |
| 17 | 01:24:06:800PM | Plasma | Ok | |
| 18 | 01:37:45:633PM | Plasma | Ok | |
| 19 | 01:51:01:700PM | Plasma | Ok | |
| 20 | 02:03:58:860PM | Plasma | Ok | |
| 21 | 02:29:24:103PM | Plasma | Ok | |
| 22 | 02:46:26:923PM | Plasma | Ok | |
| 23 | 03:00:24:617PM | Plasma | Ok | |
| 24 | 03:17:41:723PM | Plasma | Ok | |
| 25 | 03:32:28:183PM | Plasma | Ok | |
| 26 | 03:52:39:480PM | Plasma | Ok | |
| 27 | 04:24:41:280PM | Plasma | Ok | |
| 28 | 04:40:05:223PM | Plasma | Ok | |
| 29 | 05:07:41:970PM | Plasma | Ok | |