| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Martin Greenwald |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| pellet injector |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Sep 30 1993 09:27:20:260AM | Martin Greenwald | 2nd Pellet Run
We will push current to about .6 MA and try to raise the density to its limit - about 4.5e20. We will be looking at P mode confinement and ablation physics. The plasma TV is looking at continuum - should see high central density. | |
| Sep 30 1993 09:27:55:010AM | 930930001 | Martin Greenwald | Fizzle.
|
| Sep 30 1993 09:45:52:830AM | 930930002 | Martin Greenwald | Good shot at about .49 MA
|
| Sep 30 1993 10:01:28:770AM | 930930003 | Martin Greenwald | Fizzle
|
| Sep 30 1993 10:19:12:170AM | 930930004 | Martin Greenwald | Good shot - some strong interaction with RF limiter - at 93 cm
(asked them to move it out 1 cm for next shot) |
| Sep 30 1993 10:43:08:520AM | 930930005 | Martin Greenwald | Good shot - .61 MA
|
| Sep 30 1993 11:06:51:240AM | 930930006 | Martin Greenwald | First shot with pellet - at .5 sec
Moly injection at .285 sec Shark fin after pellet. |
| Sep 30 1993 11:27:05:750AM | 930930007 | Martin Greenwald | pellet - at .5 sec
Shark fin after pellet. |
| Sep 30 1993 11:40:37:910AM | 930930008 | Martin Greenwald | fizzle
- going into cell to fix tracker and drop gains on JT's Halpha |
| Sep 30 1993 12:25:50:210PM | 930930010 | Martin Greenwald | Fire pellet 14 at .5 sec.
Density rise unkown - analysis problem |
| Sep 30 1993 01:02:35:270PM | 930930012 | Martin Greenwald | Fizzle
|
| Sep 30 1993 01:07:14:000PM | 930930013 | Martin Greenwald | Disrupts about 50 msec after pellet
|
| Sep 30 1993 01:32:31:590PM | 930930014 | Martin Greenwald | Fizzle
|
| Sep 30 1993 02:22:48:370PM | 930930015 | Martin Greenwald | Good Shot with smaller pellet - shark fin after pellet
|
| Sep 30 1993 02:12:26:360PM | 930930016 | Martin Greenwald | Good Shot with smaller pellet - shark fin after pellet
|
| Sep 30 1993 02:23:04:590PM | 930930017 | Martin Greenwald | fizzle
|
| Sep 30 1993 02:43:17:210PM | 930930018 | Martin Greenwald | fizzle
|
| Sep 30 1993 03:08:36:690PM | 930930019 | Martin Greenwald | Decent start but multiple Mo injections after .45 sec
pellet at .5 |
| Sep 30 1993 03:33:41:010PM | 930930020 | Martin Greenwald | Fizzle
|
| Sep 30 1993 03:33:56:540PM | 930930021 | Martin Greenwald | Fizzle
|
| Sep 30 1993 03:52:08:340PM | 930930022 | Martin Greenwald | Put in big pellet, disrupted shortly after pellet.
big mhd |
| Sep 30 1993 04:29:38:020PM | 930930024 | Martin Greenwald | Disruption at .37 - before pellet
|
| Sep 30 1993 04:47:15:160PM | 930930025 | Martin Greenwald | Some runaways, disrupts at .82
Softs never recover |
| Sep 30 1993 04:54:48:510PM | 930930026 | Martin Greenwald | Fizzle
|
| Physics Operator Comments | |||
| Sep 30 1993 09:41:48:950AM | 930930001 | Joseph Snipes | Shot 1
Set prefill to 1.1 x 10**-5 Torr. Copied programming from 930928019. Fizzle |
| Sep 30 1993 09:53:22:250AM | 930930002 | Joseph Snipes | Shot 2
One more time . . . This time successful. |
| Sep 30 1993 10:06:59:550AM | 930930003 | Joseph Snipes | Shot 3
Increased the gas puff a bit from 150 to 180 ms to try to flatten out the density. Also increased the plasma current waveform from 500 to 600 kA. Fizzle! |
| Sep 30 1993 05:14:28:520PM | 930930004 | Joseph Snipes | Shot 4
Good shot. But note problems as OH1 passes through zero around 250 ms. |
| Sep 30 1993 10:53:52:180AM | 930930005 | Joseph Snipes | Shot 5
Moved the RF limiter out from R=0.92 m to R=0.93 m to avoid the limiter sparks. Increased the gas puff a bit from about 0.4 to 0.6 s. Pretty good. |
| Sep 30 1993 11:00:57:470AM | 930930006 | Joseph Snipes | Shot 6
Decreased the gas puff a bit from 0.5 to 0.8 s. Pellet at 0.5 s. Decent shot. |
| Sep 30 1993 11:18:28:610AM | 930930007 | Joseph Snipes | Shot 7
Pellet at 0.5 s. Decent shot. |
| Sep 30 1993 11:56:26:330AM | 930930008 | Joseph Snipes | Shot 8
Modified Ip waveform to program in the notch in the current that is being forced by the delay in OH1 as it passes through zero so that the feedback does not have to fight the power supplies, hopefully to eliminate the sudden change in radial position and decrease in kappa from 250 to 400 ms. Pellet at 0.5 s. Decent shot. |
| Sep 30 1993 11:57:14:700AM | 930930008 | Joseph Snipes | Shot 8
Previous comment was wrong! Fizzle!! |
| Sep 30 1993 12:00:32:220PM | 930930009 | Joseph Snipes | Shot 9
Reduced prefill to 1.0 x 10**-5 Torr. Good shot! Pellet at 0.5 s. |
| Sep 30 1993 12:19:20:510PM | 930930010 | Joseph Snipes | Shot 10
Changed RCUR programming from 0.68 m to 0.67 m. Decent shot. Pellet at 0.5 s. Disrupted late. |
| Sep 30 1993 12:38:00:130PM | 930930011 | Joseph Snipes | Shot 11
Decent shot. Pellet at 0.5 s. Disrupted late. |
| Sep 30 1993 12:52:58:700PM | 930930012 | Joseph Snipes | Shot 12
Reduced gain on Wire 2 slow ZCUR from 4 to 2 after 700 ms. Ti injection at 850 ms. Pellet at 0.5 s. Fizzle! |
| Sep 30 1993 01:12:06:870PM | 930930013 | Joseph Snipes | Shot 13
Reduced prefill to 9.5 x 10**-6 Torr. Ti injection at 850 ms. Pellet at 0.5 s. Disrupted at 0.6 s. |
| Sep 30 1993 01:43:47:590PM | 930930014 | Joseph Snipes | Shot 14
Reduced prefill to 9.0 x 10**-6 Torr. Reduced gain on slow ZCUR wire 2 from 4 to 2 from 0.4 s on out to help stabilize the plasma after the pellet. Ti injection at 850 ms. Pellet at 0.5 s. Fizzle! |
| Sep 30 1993 01:50:23:050PM | 930930015 | Joseph Snipes | Shot 15
Increased EF4 current from 1150 to 1180 A before breakdown to raise Bz by a couple mT. Decent shot. Pellet at 0.5 s. Disrupted at 0.95 s. |
| Sep 30 1993 02:06:00:530PM | 930930016 | Joseph Snipes | Shot 16
No change. Decent shot. Pellet at 0.5 s. Ti at 0.85 s. |
| Sep 30 1993 02:23:30:880PM | 930930017 | Joseph Snipes | Shot 17
Prefill increased to 9.5 x 10**-6 Torr. Proportional gain on slow ZCUR Wire 2 changed from 2 to 1 after 0.4 s. Plasma current waveform ramped up throughout the pulse by 30 kA over about 0.4 s. Increased gas puff early to raise the density slightly. Added a 20 ms 40V gas puff after 0.8 s. Fizzle! |
| Sep 30 1993 02:38:21:630PM | 930930018 | Joseph Snipes | Shot 18
Prefill reduced to 9.0 x 10**-6 Torr. Reduced EF4U by 10 A before breakdown to 1170 A. Fizzle! |
| Sep 30 1993 03:09:16:830PM | 930930019 | Joseph Snipes | Shot 19
Increased Chopper pre-programming voltage from 200 to 500 units. Dropped initial gas puff from 60 to 55 V as before. Reduced EF4 by 20 A before breakdown to bring it back to where it was earlier in the day. Good shot! Pellet at 0.5 s . |
| Sep 30 1993 03:17:21:930PM | 930930020 | Joseph Snipes | Shot 20
Moved RCUR programming in to 0.66 m. Increased late gas pulse to 60 V at 0.8 s. Good shot. Pellet at 0.5 s. Ti at 0.75 s. |
| Sep 30 1993 03:38:57:130PM | 930930021 | Joseph Snipes | Shot 21
Put in a step in OH1 voltage from 0.25 to 0.35 s to reduce effect of zero crossing on the current and position. Took out programming of the notch in the plasma current at 0.25 s. Increased gas puff at 0.8 s to 80 V for 30 ms. Huge gas influx before the shot. No breakdown! |
| Sep 30 1993 04:02:46:270PM | 930930022 | Joseph Snipes | Shot 22
One more time . . . Disrupted shortly after pellet at about 0.58 s. |
| Sep 30 1993 04:04:20:270PM | 930930023 | Joseph Snipes | Shot 23
One more time . . . Good shot! Small pellet at 0.5 s. |
| Sep 30 1993 04:30:45:630PM | 930930024 | Joseph Snipes | Shot 24
Increased voltage step on OH1 from 0.25 to 0.35 s from -250 to -350 V. Also changed proportional gain on slow ZCUR wire 2 from 4 to 1 after 0.2 s. Late gas puff at 0.8 s taken out. Disrupted at 0.37 s apparently due to the step on OH1. |
| Sep 30 1993 04:44:09:380PM | 930930025 | Joseph Snipes | Shot 25
Took out OH1 point at 350 ms to ramp down the step at 250 ms. Put in 60 V gas puff at 750 ms for 20 ms. Better shot, but disrupted at about 0.85 s. |
| Sep 30 1993 04:55:29:890PM | 930930026 | Joseph Snipes | Shot 26
Took out gas puff at 0.75 s. Fizzle! |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:21:37:990AM | Plasma | Ok | no faults |
| 2 | 09:39:06:590AM | Plasma | Ok | no faults |
| 3 | 09:55:29:030AM | Plasma | Ok | no faults |
| 4 | 10:11:55:440AM | Plasma | Ok | tf commutation failure in inversion |
| 5 | 10:36:20:130AM | Plasma | Ok | no faults |
| 6 | 10:53:15:650AM | Plasma | Ok | no faults |
| 7 | 11:09:46:150AM | Plasma | Ok | no faults |
| 8 | 11:33:59:790AM | Plasma | Ok | no faults |
| 9 | 11:53:35:940AM | Plasma | Ok | no faults |
| 10 | 12:13:04:660PM | Plasma | Ok | no faults |
| 11 | 12:27:43:460PM | Plasma | Ok | no faults |
| 12 | 12:43:50:520PM | Plasma | Ok | no faults |
| 13 | 01:00:06:840PM | Plasma | Ok | pf comm faults due to disruption |
| 14 | 01:30:16:340PM | Plasma | Ok | no faults |
| 15 | 01:45:33:710PM | Plasma | Ok | no faults |
| 16 | 02:00:56:390PM | Plasma | Ok | no faults |
| 17 | 02:20:21:200PM | Plasma | Ok | no faults |
| 18 | 02:35:02:500PM | Plasma | Ok | no faults |
| 19 | 02:52:00:250PM | Plasma | Ok | no faults |
| 20 | 03:12:12:080PM | Plasma | Ok | no faults |
| 21 | 03:28:30:160PM | Plasma | Ok | no faults |
| 22 | 03:43:56:510PM | Plasma | Ok | no faults |
| 23 | 04:00:23:490PM | Plasma | Ok | no faults |
| 24 | 04:17:17:570PM | Plasma | Ok | no faults |
| 25 | 04:35:01:500PM | Plasma | Ok | no faults |
| 26 | 04:51:35:980PM | Plasma | Ok | no faults |