| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yuichi Takase |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| plasma run following overnight ecdc |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Jul 2 1993 08:33:45:060AM | Joseph Snipes | Run Plan
Today's run is intended to test wall conditioning and gas fueling. The tokamak was discharge cleaned until about midnight last night when the ECDC tripped out then restarted just before 6:00 am until 8:00 am this morning. The RGA looks reasonably good with only a small mass 28 peak. Base pressure is at 1 x 10**-6. We will start with 930625025 changing the gas to B_SIDE_UPPER in H. | |
| Jul 2 1993 09:28:01:880AM | 930702001 | Yuichi Takase | Shot 001
Loaded from 930625025 added negative front porch on EF3 -50V from -14 to -1ms and increased EF4 to 750A (was 665A). Gas from B side upper (hydrogen), Pulse_gas 2 Fill gas hydrogen 3.5e-5 Discharge cleaned in He last night. Good shot 330kA nel=4e19 late breakdown (9ms) |
| Jul 2 1993 09:40:10:420AM | 930702002 | Yuichi Takase | Shot 002
300kA shark fin @ 0.2sec, disruptive after that. Earlier breakdown (4ms), colder shot. |
| Jul 2 1993 09:55:12:320AM | 930702003 | Yuichi Takase | Shot 003
Removed the second gas puff around .12s. Starts out as a runaway shot, becomes thermal after 0.12sec. Current drops, density jumps up, etc. (@ .12sec). |
| Jul 2 1993 10:15:13:680AM | 930702004 | Yuichi Takase | Shot 004
Increased the initial gas puff. Runaway shot. 60Hz on OH1 and OH2 are worse today compared to yesterday. |
| Jul 2 1993 10:40:22:650AM | 930702005 | Yuichi Takase | Shot 005
Dropped EF4 to 700A (was 750A). Fill pressure increased to 4.5e-5. Good shot (thermal). 360kA |
| Jul 2 1993 11:14:13:670AM | 930702006 | Yuichi Takase | Shot 006
Fill pressure decreased to 4.e-5. DAQ2 didn't go. No hybrid. No plasma. Some of DAQ1 didn't go. |
| Jul 2 1993 11:30:57:190AM | 930702007 | Yuichi Takase | Repeat.
Good shot. 300kA nel=4.e19 |
| Jul 2 1993 12:07:16:070PM | 930702008 | Yuichi Takase | Shot 008
Increased gas puff around 50msec (a small change). Added a gas puff pulse after the shot for Artur. Disruptive shot. 250kA nel=4-5e19. |
| Jul 2 1993 12:03:03:290PM | 930702009 | Joseph Snipes | Shot 9
Fill pressure lowered from 4 to 3.7 x 10**-5 Torr. Late gas puff moved from 0.99 to 0.7 s to check pressure gauge. EF3 inverted front porch increased to -75 V . |
| Jul 2 1993 12:19:46:120PM | 930702009 | Yuichi Takase | Shot 009
Disruptive until about 0.16sec. Limiter midplane density drops, limiter bottom density increases at this time. Plasma density and soft X-ray also increase. |
| Jul 2 1993 12:31:17:080PM | 930702010 | Yuichi Takase | Decreased pulsed gas.
OK shot. Plasma moves in after 0.21sec and down after 0.25sec. Density drops after about .165sec. |
| Jul 2 1993 12:39:12:260PM | 930702011 | Yuichi Takase | Shot 011
Decreased pulsed gas again. Moved the late gas puff for Artur to 0.8sec. Fizzled. |
| Jul 2 1993 12:51:04:900PM | 930702012 | Yuichi Takase | Shot 012
EF3 inverted front porch changed back to -50V (was -75V). Fizzled. |
| Jul 2 1993 01:16:55:450PM | 930702013 | Yuichi Takase | Shot 013
Increased EF4 to 740A (was 700A). Good shot. 340kA nel=3.5e19 @ .25sec. |
| Jul 2 1993 01:37:20:780PM | 930702014 | Yuichi Takase | Shot 014
Moved EF3 inverted front porch turn on to -8msec (ramps from -9 to -7ms), Good shot. 300kA nel=3.5e19. |
| Jul 2 1993 01:50:16:880PM | 930702015 | Joseph Snipes | Shot 15
Lowered EF4 current before breakdown to 725 A. |
| Jul 2 1993 02:03:15:690PM | 930702015 | Joseph Snipes | Shot 16
Lowered EF4 current before breakdown to 715 A. Increased prefill to 4 x 10**-5. |
| Jul 2 1993 02:03:48:570PM | 930702015 | Yuichi Takase | Shot 015
Reduced EF4 to 725A (was 740A). Added Ar puff (-100 to -90msec). Lots of hards. |
| Jul 2 1993 02:16:02:870PM | 930702016 | Yuichi Takase | Shot 016
Reduced EF4 to 715A. Prefill 4.e-5. Good shot. 340kA nel=4.e19. |
| Jul 2 1993 02:36:36:770PM | 930702017 | Yuichi Takase | Shot 017
Ar puff increased to 80V (was 60V). H puff moved earlier to -10ms (was -5ms). Fizzled. |
| Jul 2 1993 02:54:07:240PM | 930702018 | Yuichi Takase | Shot 018
Ripple on OH1 appears to be causing a problem on Bz. Depending on which phase we hit, Bz can vary by about 15gauss. Will go to 6 pulse instead of 12 pulse on OH1 for shot 018. Runaway shot. |
| Jul 2 1993 03:09:51:040PM | 930702019 | Yuichi Takase | Shot 019
The other 6 pulse on OH1. Increased prefill to 4.5e-5. OH1 cleaner. Didn't get EF3 inverted front porch. |
| Jul 2 1993 04:35:35:230PM | 930702019 | Yuichi Takase | Previous shot used the rear cabinet.
This shot used the front cabinet. (The front cabinet is the good half.) |
| Jul 2 1993 03:20:30:920PM | 930702020 | Yuichi Takase | Shot 020
EF4 reduced to 685A (was 715A). Good shot. 340kA nel=3.2e19. |
| Jul 2 1993 03:34:39:050PM | 930702021 | Yuichi Takase | Shot 021
Ar puff extended by 2ms (-100 to -88ms). H puff start moved to -20ms. Fizzled. |
| Jul 2 1993 03:44:00:990PM | 930702022 | Yuichi Takase | Shot 022
H puff start moved to -5ms. Good shot. 340kA nel=3.2e19. |
| Jul 2 1993 04:05:21:260PM | 930702023 | Yuichi Takase | Shot 023
Ar puff increased to 14ms (-100 to -86ms). Fizzled. EF3 turned on by itself (500A) around -25msec. |
| Jul 2 1993 04:17:36:240PM | 930702024 | Yuichi Takase | Shot 024
Ar puff increased to 14ms (-100 to -86ms). Added 2nd Ar puff (.8 to .9sec) for Artur. Fizzled again. |
| Jul 2 1993 04:32:57:250PM | 930702025 | Yuichi Takase | Shot 025
Took out the negative front porch. Fizzled. Problem with EF3 again (-500A at -13ms). |
| Physics Operator Comments |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:56:56:540AM | Plasma | Ok | no faults -- good plasma to start |
| 2 | 09:26:59:040AM | Plasma | Ok | no faults |
| 3 | 09:42:13:020AM | Plasma | Ok | no faults |
| 4 | 10:04:27:680AM | Plasma | Ok | no faults oh1 60hz worse than usual |
| 5 | 10:22:59:040AM | Plasma | Ok | no faults |
| 6 | 10:53:17:020AM | Plasma | Bad | hybrid problems |
| 7 | 11:16:12:530AM | Plasma | Ok | power systems fired but problems with the data system |
| 8 | 11:38:56:700AM | Plasma | Ok | no faults |
| 9 | 11:59:42:960AM | Plasma | Ok | jd and fs |
| 10 | 12:16:00:890PM | Plasma | Ok | ok shot |
| 11 | 12:32:10:370PM | Plasma | Ok | no faults |
| 12 | 12:44:18:150PM | Plasma | Ok | no faults |
| 13 | 01:08:28:470PM | Plasma | Ok | no faults |
| 14 | 01:28:20:200PM | Plasma | Ok | no faults |
| 15 | 01:49:15:320PM | Plasma | Ok | no faults |
| 16 | 02:05:42:240PM | Plasma | Ok | no faults |
| 17 | 02:19:13:280PM | Plasma | Ok | no faults |
| 18 | 02:42:09:340PM | Plasma | Ok | no faults |
| 19 | 02:55:00:840PM | Plasma | Ok | no fault |
| 20 | 03:11:08:180PM | Plasma | Ok | no faults |
| 21 | 03:25:01:490PM | Plasma | Ok | no faults |
| 22 | 03:36:30:640PM | Plasma | Ok | no faults |
| 23 | 03:52:40:240PM | Plasma | Ok | no fault |
| 24 | 04:09:24:150PM | Plasma | Ok | no fault |
| 25 | 04:21:33:400PM | Plasma | Ok | no faults |