Alcator C-Mod Run 930501 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: Steve Horne (shots 1-20)

Operators
Session leader(s):	Steve Horne
Physics operator(s):	Ian Hutchinson
Engineering operator(s):	Unknown

Engineering Operator Run Comment
Power Supply Tests

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments

May 1 1993 08:21:55:790AM Ian Hutchinson Some games with the hybrid wavegen.
OH2 rogowski discovered to be broken by foot!

May 1 1993 09:08:59:400AM Ian Hutchinson Some initial tests were able to get OH2 going. Shot counter was reset to 1.
Search completed around 9:10. Took rather a long time. Should concentrate
on getting a good routine for this.

May 1 1993 10:24:43:910AM Ian Hutchinson Some initial tests were able to get OH2 going. Shot counter was reset to 1.
Search completed around 9:10. Took rather a long time. Should concentrate
on getting a good routine for this.

May 1 1993 10:34:55:820AM Ian Hutchinson Shot 3 asked for 5 kA. The consensus of the shunts and the internal
magnetics is that we got around 8 kA. This scaled correctly from the
previous (3.2 from 2 requested.) Hybrid is not ready so we are moving
on to EF3.

May 1 1993 09:56:17:370AM 930501002 Steve Horne For shot 2, notice that

OH2 U buss shunt reading is - 3200
L + 3500

But

OH2 Buss rog U reads + 1100
L -1900

Some of these are wrong.

May 1 1993 11:17:11:550AM 930501004 Steve Horne puzzling shot. We tried to fire ef4. Possibly fired EF3 instead.
EF3 was left on, set to zero. Fired at some low level. (400 A?)
EF4 didn't fire, probably.

May 1 1993 11:20:53:990AM 930501004 Steve Horne Plan for next shot -- EF3 really really off, oh2 off, ef4 demand to 2 KA

May 1 1993 01:24:50:410PM 930501007 Steve Horne OH2 commutation -- one fixed, on not
Gwinn, Silva worked on EF3.
ef4 problem being worked on -- bad 24 volt supply
OH1 -- reconnected Rogowski
Installed "bell" on buss.
Replaced AFOL rcvr for oh2 u,l with the one from the chopper.
Plan for next shot -- commutate oh2u,l (at least one won't work)
and verify programming of oh2 to digitizer. Under PLC control.

May 1 1993 02:18:10:180PM 930501010 Steve Horne EF4 current in wrong direction.
ef2 U rog is backwards
Next shot plan -- 2 KA on EF3 only.

May 1 1993 03:24:45:980PM 930501012 Steve Horne Try v programming for ef3. It worked.

May 1 1993 03:25:40:650PM 930501014 Steve Horne Last shot had feedback on ef3 rogowski, showing correct behavior at gain=1 on pid.
Next shot has pid gain=5.

May 1 1993 03:41:56:150PM 930501014 Steve Horne Last shot had feedback on ef3 rogowski, showing correct behavior at gain=1 on pid.
Next shot has pid gain=5.
That worked.

May 1 1993 03:43:59:860PM 930501015 Steve Horne This shot (15) has drawn current in ef3 for more time (100 msec or so)
and a small pedestal on the current regulation.

May 1 1993 04:06:35:780PM 930501015 Steve Horne This shot (15) has drawn current in ef3 for more time (100 msec or so)
and a small pedestal on the current regulation.

That tried to work For next shot changed ef3 voltage programming.

May 1 1993 04:10:41:920PM 930501015 Steve Horne For this shot (17) try OH1 plc control, 15 ka demand,commutation.
ef3 current feedback, -1500 A

May 1 1993 04:23:59:470PM 930501017 Steve Horne For this shot (17) try OH1 plc control, 15 ka demand,commutation.
ef3 current feedback, -1500 A
That was real complicated. Try less voltage and more gain on ef3.

May 1 1993 04:52:00:440PM 930501018 Steve Horne For this shot (17) try OH1 plc control, 15 ka demand,commutation.
ef3 current feedback, -1500 A
That was real complicated. Try less voltage and more gain on ef3.

May 1 1993 04:57:26:960PM 930501018 Steve Horne Add 1 unit derivative gain to ef3 and pray.
tf again, same as last shot

May 1 1993 05:09:48:820PM 930501018 Steve Horne Add 1 unit derivative gain to ef3 and pray.
tf again, same as last shot
EF3 didn't run at all.

Physics Operator Comments

Engineering Operator Comments

Shot Time Type Status Comment

1 09:24:26:480AM Test Bad OH2 jorway trigger and camac trigger switched

2 09:41:26:550AM Test Ok both oh2 fired; calibration errors

3 10:15:51:020AM Test Ok Both power supplies worked; checking calibration of rogowskis

4 10:59:06:860AM Test Bad EF3 fired accidentally! EF4 did not fire as intended

5 11:23:28:640AM Test Bad No EF4

6 11:31:07:170AM Test Bad No EF4

7 11:39:18:450AM Test Bad looks ,like I/O processor fault

8 01:36:28:740PM Test Bad OH2 switch did not close; we had opened cabinet doors

9 01:56:37:620PM Test Ok Both OH2 at 8 ka

10 02:05:52:550PM Test Ok 9 power supplies at once: 2 OH2, 4 EF2, 3 EF4, all OK

11 02:22:55:060PM Test Ok EF3 test; program 2 kA, got about 1.3 kA

12 02:34:00:600PM Test Ok EF3; set for 6000, got 5000, OK

13 02:53:50:300PM Test Ok EF3 under hybrid control; works OK i

14 03:13:24:200PM Test Ok EF3 Test under hybrid control

15 03:30:28:190PM Test Ok EF3 and both EF1 closed circuit

16 03:43:21:300PM Test Ok EF1 and EF3; EF1 did commutate OK with no fault

17 04:12:05:590PM Test Ok OH1 commutation & EF3 hybrid

18 04:41:33:320PM Test Ok OH1 plus first TF test; crowbar at 30 kA

19 05:00:58:520PM Test Ok last shot; TF crowbar, no ef3, cause unknown

20 04:36:42:140PM Test Bad

Session Leader Comments
May 1 1993 08:21:55:790AM		Ian Hutchinson	Some games with the hybrid wavegen. OH2 rogowski discovered to be broken by foot!
May 1 1993 09:08:59:400AM		Ian Hutchinson	Some initial tests were able to get OH2 going. Shot counter was reset to 1. Search completed around 9:10. Took rather a long time. Should concentrate on getting a good routine for this.
May 1 1993 10:24:43:910AM		Ian Hutchinson	Some initial tests were able to get OH2 going. Shot counter was reset to 1. Search completed around 9:10. Took rather a long time. Should concentrate on getting a good routine for this.
May 1 1993 10:34:55:820AM		Ian Hutchinson	Shot 3 asked for 5 kA. The consensus of the shunts and the internal magnetics is that we got around 8 kA. This scaled correctly from the previous (3.2 from 2 requested.) Hybrid is not ready so we are moving on to EF3.
May 1 1993 09:56:17:370AM	930501002	Steve Horne	For shot 2, notice that OH2 U buss shunt reading is - 3200 L + 3500 But OH2 Buss rog U reads + 1100 L -1900 Some of these are wrong.
May 1 1993 11:17:11:550AM	930501004	Steve Horne	puzzling shot. We tried to fire ef4. Possibly fired EF3 instead. EF3 was left on, set to zero. Fired at some low level. (400 A?) EF4 didn't fire, probably.
May 1 1993 11:20:53:990AM	930501004	Steve Horne	Plan for next shot -- EF3 really really off, oh2 off, ef4 demand to 2 KA
May 1 1993 01:24:50:410PM	930501007	Steve Horne	OH2 commutation -- one fixed, on not Gwinn, Silva worked on EF3. ef4 problem being worked on -- bad 24 volt supply OH1 -- reconnected Rogowski Installed "bell" on buss. Replaced AFOL rcvr for oh2 u,l with the one from the chopper. Plan for next shot -- commutate oh2u,l (at least one won't work) and verify programming of oh2 to digitizer. Under PLC control.
May 1 1993 02:18:10:180PM	930501010	Steve Horne	EF4 current in wrong direction. ef2 U rog is backwards Next shot plan -- 2 KA on EF3 only.
May 1 1993 03:24:45:980PM	930501012	Steve Horne	Try v programming for ef3. It worked.
May 1 1993 03:25:40:650PM	930501014	Steve Horne	Last shot had feedback on ef3 rogowski, showing correct behavior at gain=1 on pid. Next shot has pid gain=5.
May 1 1993 03:41:56:150PM	930501014	Steve Horne	Last shot had feedback on ef3 rogowski, showing correct behavior at gain=1 on pid. Next shot has pid gain=5. That worked.
May 1 1993 03:43:59:860PM	930501015	Steve Horne	This shot (15) has drawn current in ef3 for more time (100 msec or so) and a small pedestal on the current regulation.
May 1 1993 04:06:35:780PM	930501015	Steve Horne	This shot (15) has drawn current in ef3 for more time (100 msec or so) and a small pedestal on the current regulation. That tried to work For next shot changed ef3 voltage programming.
May 1 1993 04:10:41:920PM	930501015	Steve Horne	For this shot (17) try OH1 plc control, 15 ka demand,commutation. ef3 current feedback, -1500 A
May 1 1993 04:23:59:470PM	930501017	Steve Horne	For this shot (17) try OH1 plc control, 15 ka demand,commutation. ef3 current feedback, -1500 A That was real complicated. Try less voltage and more gain on ef3.
May 1 1993 04:52:00:440PM	930501018	Steve Horne	For this shot (17) try OH1 plc control, 15 ka demand,commutation. ef3 current feedback, -1500 A That was real complicated. Try less voltage and more gain on ef3.
May 1 1993 04:57:26:960PM	930501018	Steve Horne	Add 1 unit derivative gain to ef3 and pray. tf again, same as last shot
May 1 1993 05:09:48:820PM	930501018	Steve Horne	Add 1 unit derivative gain to ef3 and pray. tf again, same as last shot EF3 didn't run at all.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:24:26:480AM	Test	Bad	OH2 jorway trigger and camac trigger switched
2	09:41:26:550AM	Test	Ok	both oh2 fired; calibration errors
3	10:15:51:020AM	Test	Ok	Both power supplies worked; checking calibration of rogowskis
4	10:59:06:860AM	Test	Bad	EF3 fired accidentally! EF4 did not fire as intended
5	11:23:28:640AM	Test	Bad	No EF4
6	11:31:07:170AM	Test	Bad	No EF4
7	11:39:18:450AM	Test	Bad	looks ,like I/O processor fault
8	01:36:28:740PM	Test	Bad	OH2 switch did not close; we had opened cabinet doors
9	01:56:37:620PM	Test	Ok	Both OH2 at 8 ka
10	02:05:52:550PM	Test	Ok	9 power supplies at once: 2 OH2, 4 EF2, 3 EF4, all OK
11	02:22:55:060PM	Test	Ok	EF3 test; program 2 kA, got about 1.3 kA
12	02:34:00:600PM	Test	Ok	EF3; set for 6000, got 5000, OK
13	02:53:50:300PM	Test	Ok	EF3 under hybrid control; works OK i
14	03:13:24:200PM	Test	Ok	EF3 Test under hybrid control
15	03:30:28:190PM	Test	Ok	EF3 and both EF1 closed circuit
16	03:43:21:300PM	Test	Ok	EF1 and EF3; EF1 did commutate OK with no fault
17	04:12:05:590PM	Test	Ok	OH1 commutation & EF3 hybrid
18	04:41:33:320PM	Test	Ok	OH1 plus first TF test; crowbar at 30 kA
19	05:00:58:520PM	Test	Ok	last shot; TF crowbar, no ef3, cause unknown
20	04:36:42:140PM	Test	Bad