| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Bill Cochran,Ed Fitzgerald |
| Engineering Operator Run Comment |
| Boronization recovery and RF conditioning PO: Mossessian EO: Cochran,Fi |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:34:833PM |
| Author: Steve Wukitch |
| PO: Mossessian Boronization recovery and RF conditionning (MP355) Run begins at 09:00 and ends at 17:00. Power systems the same as on 1031106008 (0.8 MA, 5.4 T, Lower single null) 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 Run Plan: Start with lower null plasmas and bring up machine and rf as possible. We will start with 1031107029. ---------------------------------------------------------------------------- 002 BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 0.5 MW, [0.6, 1.5] sec E: 0.5 MW, [0.6, 1.5] sec J: 0.3 MW x 2 [0.8, 1.5] sec result: Plasma. D: ran. one fault. E: OFF. J: ran. Max faults. Bad matching in J4. H/D: 0.04 FMIT#2 driver screen voltage dropped before the shot. (screen overload). It could not come back. The by-pass capacitor of the driver ggrid has been punched through. 003: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 0.8 MW, [0.6, 1.5] sec J: 0.5 MW x 2 [0.8, 1.5] sec result: Plasma. D: ran. clean J: ran. 2 trips. L-mode. Next raise power. 005: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.0 MW, [0.6, 1.5] sec J: 0.7 MW x 2 [0.8, 1.5] sec result: Plasma. D: ran. clean. J: ran. max faults. EDA H-mode Next: Raise D power. Move J earlier than D. 006 fizzle 007: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.7 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. one trip. J: ran. max faults. Much better. EDA H-modes Next: raise J power. 009: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.8 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. clean. J: ran. max faults. Progressively better. (No CAMAC data in the power room. Modules not triggered.) EDA H-modes 010 dud 012 dud 013 BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.8 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. clean J: ran. max faults. better. 014 fizzle 015: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.75 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. clean J: ran. max faults. better. EDA H-mode 016 dud. CAMAC server2 down. 017: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.75 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. one fault. J: ran. max faults. better. EDA H-mode H-factor > 1.5. Wplasma 110 kJ. PRF_max = 3 MW. It is a 'healthy' plasma. 019: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.75 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. one fault. J: ran. max faults. EDA H-mode 022: BT = 5.4 T, nl04 = 0.8e20 m^-2, Ip = .8 MA, LSN D: 1.2 MW, [0.8, 1.5] sec J: 0.7 MW x 2 [0.6, 1.5] sec result: Plasma. D: ran. one fault. J: ran. max faults. No improvement. EDA H-mode ---------------------------------------------------------------------------- Summary: 11 plasmas. D port conditioned well. J-port was struggling. No improvement from the beginning. A lot more plasma shots are needed to condition this antenna. E-port: By-pass capacitor in the driver was punched through. It will be disassembled and repaired. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:19:677PM |
| Author: Dmitri Mossessian |
| Run plan: PO: Mossessian Boronization recovery and RF conditionning Run begins at 09:00 and ends at 17:00. Power systems the same as on 1031106008 (0.8 MA, 5.4 T, Lower single null) 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 Run Plan: Start with lower null plasmas and bring up machine and rf as possible. We will start with 1031107029. _________________________________________ Summary: We had many problems today. Every second shot was a fizzle or a dud, independent of the PO attempts to control prepuff gas pressure. The fields on good and bad shots were almost exactly the same, so the reason for multiple fizzles/duds remain unclear. Other problems include: Run was delayed until 10:30 due to alternator problems. First shot was a data system cycle because of the computer problem. Several ion gauges failed several times, so sometimes we were not able to determine the torus pressure before the shot (see details section below for details) There were several problems with CAMAc servers, one of them (CAMAC2) producing a shot with wrong magnetic timing - the dud on shot 16 We had total of 22 shots. 11 plasmas 6 fizzles 4 duds 1 data system cycle Details: ---------------------------------------------------------------------------- 1031112001 mossessian PHYSICS_OPERATOR Nov 12 2003 10:59:36:906AM . . . . . . . . . . . . . . . . . . . . Run delayed due to alternator coming up to speed unusually slow. Started first shot on ~ 10:30 First shot was data system cycle due to computer problems. ---------------------------------------------------------------------------- 1031112002 mossessian PHYSICS_OPERATOR Nov 12 2003 11:07:59:046AM . . . . . . . . . . . . . . . . . . . . Plasma attempt. Succesful. nl was programed to go to 0 after 1 sec. For next shot: program nl of 0.8e20 up to 1.6 sec ---------------------------------------------------------------------------- 1031112003 mossessian PHYSICS_OPERATOR Nov 12 2003 11:54:57:423AM . . . . . . . . . . . . . . . . . . . . Plasma. Nice smooth startup. Next shot: No changes ---------------------------------------------------------------------------- 1031112004 mossessian PHYSICS_OPERATOR Nov 12 2003 12:02:23:516PM . . . . . . . . . . . . . . . . . . . . Fizzle. Looks like too much prepuff. Next shot: reduce pulse_gas4 from 23 to 20 msec ---------------------------------------------------------------------------- 1031112005 mossessian PHYSICS_OPERATOR Nov 12 2003 12:33:53:780PM . . . . . . . . . . . . . . . . . . . . IGT gauge has failed on the previous shot and was replaced for now by IGP2. Plasma. Current rise at startup is still rather slow. Next shot: Drop prepuff from 20 to 18 msec ---------------------------------------------------------------------------- 1031112006 mossessian PHYSICS_OPERATOR Nov 12 2003 12:51:30:530PM . . . . . . . . . . . . . . . . . . . . Fizzle. ratiomatic shows pressure higher than on shot 5. However, Brian claims that gsuge's calibration is off. So we do not know, what the real pressure is. Next shot: No changes ---------------------------------------------------------------------------- 1031112007 mossessian PHYSICS_OPERATOR Nov 12 2003 1:24:45:203PM . . . . . . . . . . . . . . . . . . . . Plasma. It seems that the pressure at startup phase jumps around from shot to shot. It is possible, that shutting off the gate valve before the shot affects pressure differently depending on whether previous shot was fizzle or plasma. We will disable pulsing the gate valve for the next 4 shots to see what happens. Next shot: No PCS changes ---------------------------------------------------------------------------- 1031112008 mossessian PHYSICS_OPERATOR Nov 12 2003 1:25:45:923PM . . . . . . . . . . . . . . . . . . . . Fizzle. ratiomatic shows slightly LOWER pressure than on shot 7. However, curent rise is virtually nonexistant. Next shot: No PCS changes ---------------------------------------------------------------------------- 1031112009 mossessian PHYSICS_OPERATOR Nov 12 2003 1:51:11:610PM . . . . . . . . . . . . . . . . . . . . Plasma. The pressure is the same as on shot 8 (according to the gauge at least) Next shot: Ar down to 26 msec (PG1) ---------------------------------------------------------------------------- 1031112010 mossessian PHYSICS_OPERATOR Nov 12 2003 2:13:57:500PM . . . . . . . . . . . . . . . . . . . . The shot was delayed because of a problem with the ITP gauge that was showing high pressure (in e-5 range). It is possible that there is a leak in the machine. Dud. Ratiomatic shows even lower pressure (0.05 range). Next shot: Increase PG4 back to 20 msec ---------------------------------------------------------------------------- 1031112011 mossessian PHYSICS_OPERATOR Nov 12 2003 2:32:39:766PM . . . . . . . . . . . . . . . . . . . . Tom changed the gauge again. It seems to work better now. This is the gauge IGP2 - right on the pump. Plasma. Current rise is slow, although pressure is very low (0.055) Next shot: No PCS change. ---------------------------------------------------------------------------- 1031112012 mossessian PHYSICS_OPERATOR Nov 12 2003 2:44:50:953PM . . . . . . . . . . . . . . . . . . . . Dud. All fields and pressures are almost exactly the same as on shot 11. Next shot: No PCS changes. ---------------------------------------------------------------------------- 1031112013 mossessian PHYSICS_OPERATOR Nov 12 2003 2:56:18:716PM . . . . . . . . . . . . . . . . . . . . Plasma. It was suggested that the pressure may be marginally low and we are getting alternating duds/plasmas Next shot: Raise PG4 to 22 msec ---------------------------------------------------------------------------- 1031112014 mossessian PHYSICS_OPERATOR Nov 12 2003 3:07:21:513PM . . . . . . . . . . . . . . . . . . . . Fizzle. Possibly because there is too much gas. Next shot: set 21 msec on PG4 ---------------------------------------------------------------------------- 1031112015 mossessian PHYSICS_OPERATOR Nov 12 2003 3:19:31:423PM . . . . . . . . . . . . . . . . . . . . Plasma Next shot: No PCS change ---------------------------------------------------------------------------- 1031112016 mossessian PHYSICS_OPERATOR Nov 12 2003 3:37:20:233PM . . . . . . . . . . . . . . . . . . . . Dud. Looks like due to the magnetics timing error that happened because of CAMAC2 server fault. Next shot: No PCS changes ---------------------------------------------------------------------------- 1031112017 mossessian PHYSICS_OPERATOR Nov 12 2003 3:47:49:093PM . . . . . . . . . . . . . . . . . . . . Plasma. Next shot: go back to 20 msec of PG4 ---------------------------------------------------------------------------- 1031112018 mossessian PHYSICS_OPERATOR Nov 12 2003 4:05:08:493PM . . . . . . . . . . . . . . . . . . . . Dud. Reason unclear. Next shot: No PCS changes. ---------------------------------------------------------------------------- 1031112019 mossessian PHYSICS_OPERATOR Nov 12 2003 4:13:00:570PM . . . . . . . . . . . . . . . . . . . . Plasma. Next shot: no changes ---------------------------------------------------------------------------- 1031112020 mossessian PHYSICS_OPERATOR Nov 12 2003 4:43:18:180PM . . . . . . . . . . . . . . . . . . . . Fizzle. Gas pressure may be too high Next shot: no change ---------------------------------------------------------------------------- 1031112021 mossessian PHYSICS_OPERATOR Nov 12 2003 4:48:20:546PM . . . . . . . . . . . . . . . . . . . . Fizzle. Ip went up to 40 kA and died. Next shot: Ar back up to 25 msec (PG1) ---------------------------------------------------------------------------- 1031112022 mossessian PHYSICS_OPERATOR Nov 12 2003 4:56:13:090PM . . . . . . . . . . . . . . . . . . . . Plasma. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Nov 12 2003 08:51:41:720AM | Dmitri Mossessian | PO: Mossessian Boronization recovery and RF conditionning Run begins at 09:00 and ends at 17:00. Power systems the same as on 1031106008 (0.8 MA, 5.4 T, Lower single null) 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 Run Plan: Start with lower null plasmas and bring up machine and rf as possible. We will start with 1031107029. 8:48 AM - Loaded 1031107029. | |
| Nov 12 2003 10:59:36:907AM | 1031112001 | Dmitri Mossessian | Run delayed due to alternator coming up to speed unusually slow. Started first shot on ~ 10:30 First shot was data system cycle due to computer problems. |
| Nov 12 2003 11:07:59:047AM | 1031112002 | Dmitri Mossessian | Plasma attempt. Succesful. nl was programed to go to 0 after 1 sec. For next shot: program nl of 0.8e20 up to 1.6 sec |
| Nov 12 2003 11:54:57:423AM | 1031112003 | Dmitri Mossessian | Plasma. Nice smooth startup. Next shot: No changes |
| Nov 12 2003 12:02:23:517PM | 1031112004 | Dmitri Mossessian | Fizzle. Looks like too much prepuff. Next shot: reduce pulse_gas4 from 23 to 20 msec |
| Nov 12 2003 12:33:53:780PM | 1031112005 | Dmitri Mossessian | IGT gauge has failed on the previous shot and was replaced for now by IGP2. Plasma. Current rise at startup is still rather slow. Next shot: Drop prepuff from 20 to 18 msec |
| Nov 12 2003 12:51:30:530PM | 1031112006 | Dmitri Mossessian | Fizzle. ratiomatic shows pressure higher than on shot 5. However, Brian claims that gsuge's calibration is off. So we do not know, what the real pressure is. Next shot: No changes |
| Nov 12 2003 01:24:45:203PM | 1031112007 | Dmitri Mossessian | Plasma. It seems that the pressure at startup phase jumps around from shot to shot. It is possible, that shutting off the gate valve before the shot affects pressure differently depending on whether previous shot was fizzle or plasma. We will disable pulsing the gate valve for the next 4 shots to see what happens. Next shot: No PCS changes |
| Nov 12 2003 01:25:45:923PM | 1031112008 | Dmitri Mossessian | Fizzle. ratiomatic shows slightly LOWER pressure than on shot 7. However, curent rise is virtually nonexistant. Next shot: No PCS changes |
| Nov 12 2003 01:51:11:610PM | 1031112009 | Dmitri Mossessian | Plasma. The pressure is the same as on shot 8 (according to the gauge at least) Next shot: Ar down to 26 msec (PG1) |
| Nov 12 2003 02:13:57:500PM | 1031112010 | Dmitri Mossessian | The shot was delayed because of a problem with the ITP gauge that was showing high pressure (in e-5 range). It is possible that there is a leak in the machine. Dud. Ratiomatic shows even lower pressure (0.05 range). Next shot: Increase PG4 back to 20 msec |
| Nov 12 2003 02:32:39:767PM | 1031112011 | Dmitri Mossessian | Tom changed the gauge again. It seems to work better now. This is the gauge IGP2 - right on the pump. Plasma. Current rise is slow, although pressure is very low (0.055) Next shot: No PCS change. |
| Nov 12 2003 02:44:50:953PM | 1031112012 | Dmitri Mossessian | Dud. All fields and pressures are almost exactly the same as on shot 11. Next shot: No PCS changes. |
| Nov 12 2003 02:56:18:717PM | 1031112013 | Dmitri Mossessian | Plasma. It was suggested that the pressure may be marginally low and we are getting alternating duds/plasmas Next shot: Raise PG4 to 22 msec |
| Nov 12 2003 03:07:21:513PM | 1031112014 | Dmitri Mossessian | Fizzle. Possibly because there is too much gas. Next shot: set 21 msec on PG4 |
| Nov 12 2003 03:19:31:423PM | 1031112015 | Dmitri Mossessian | Plasma Next shot: No PCS change |
| Nov 12 2003 03:37:20:233PM | 1031112016 | Dmitri Mossessian | Dud. Looks like due to the magnetics timing error that happened because of CAMAC2 server fault. Next shot: No PCS changes |
| Nov 12 2003 03:47:49:093PM | 1031112017 | Dmitri Mossessian | Plasma. Next shot: go back to 20 msec of PG4 |
| Nov 12 2003 04:05:08:493PM | 1031112018 | Dmitri Mossessian | Dud. Reason unclear. Next shot: No PCS changes. |
| Nov 12 2003 04:13:00:570PM | 1031112019 | Dmitri Mossessian | Plasma. Next shot: no changes |
| Nov 12 2003 04:43:18:180PM | 1031112020 | Dmitri Mossessian | Fizzle. Gas pressure may be too high Next shot: no change |
| Nov 12 2003 04:48:20:547PM | 1031112021 | Dmitri Mossessian | Fizzle. Ip went up to 40 kA and died. Next shot: Ar back up to 25 msec (PG1) |
| Nov 12 2003 04:56:13:090PM | 1031112022 | Dmitri Mossessian | Plasma. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 10:34:59:047AM | Plasma | Bad | Data system hung up |
| 2 | 10:58:30:703AM | Plasma | Ok | |
| 3 | 11:41:15:343AM | Plasma | Ok | |
| 4 | 11:54:21:220AM | Plasma | Ok | |
| 5 | 12:29:09:673PM | Plasma | Ok | |
| 6 | 12:42:18:157PM | Plasma | Ok | |
| 7 | 12:58:59:483PM | Plasma | Ok | |
| 8 | 01:15:27:500PM | Plasma | Ok | |
| 9 | 01:28:01:330PM | Plasma | Ok | |
| 10 | 02:09:05:687PM | Plasma | Ok | |
| 11 | 02:25:35:343PM | Plasma | Ok | |
| 12 | 02:38:01:830PM | Plasma | Ok | |
| 13 | 02:51:12:570PM | Plasma | Ok | |
| 14 | 03:03:53:247PM | Plasma | Ok | |
| 15 | 03:16:35:233PM | Plasma | Ok | |
| 16 | 03:29:35:987PM | Plasma | Bad | camac2 server went down before shot |
| 17 | 03:42:35:600PM | Plasma | Ok | |
| 18 | 03:56:15:323PM | Plasma | Ok | |
| 19 | 04:10:50:613PM | Plasma | Ok | |
| 20 | 04:27:12:530PM | Plasma | Ok | |
| 21 | 04:41:19:613PM | Plasma | Ok | |
| 22 | 04:53:46:990PM | Plasma | Ok | |