Alcator C-Mod Run 970509 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: Unknown (shots 1-21)

Operators
Session leader(s):	Unknown
Physics operator(s):	Steve Wolfe
Engineering operator(s):	Unknown

Engineering Operator Run Comment
power tests

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments

Physics Operator Comments

May 9 1997 07:35:31:950AM Steve Wolfe Setting up for power tests. We will be excersizing the hybrid today, so
I need to check it out again. Last night when I tried, we found the
hybrid crate was off-line. Joe Bosco found tre fibers and put them back,
following which everything worked, following a coldstart.

07:30 Coldstart ok

May 9 1997 07:49:41:750AM Steve Wolfe Start setting up PCS for test shots.
Load from 960802010, which was a full hybrid control setup from last
campaign.

Turn off seg 2.

The first candidate for hybrid control is the chopper.
Voltage waveform is ramping from .048 to .100, then zero.
Initial fast ZCUR gains are D=1, P=2.4

Do a Load_into_model (Load/clean)
All messages look ok.

May 9 1997 08:03:40:660AM 970509001 Steve Wolfe First test shot.
Only Engineering tree is in the Cmod_manage list, so there won't be a lot
of data.

EF1U amd L test. 2kA PLC
Current waveforms look ok. Not seeing the Supply voltages yet.
Looks like a screw-up on the digitizer setups. We are seeing voltages on
EF2 supplies.

Also, Vinnies power supply control panel blew away with a message about
parent of node is off, on setting EF2U.

May 9 1997 08:32:36:680AM 970509002 Steve Wolfe FOr shot 2, include mhd::magnetics, mhd::analysis, and hybrid.

TWF being consulted on tree setup, control panel.

Repeat of shot 1 - EFIU&L PLC test.
Got CAMAC this time, EF1L voltage is very hashy.

Fast ZCUR seems to have an offset of 2000 (phys_a_out scope).
Br0 at .004.

May 9 1997 08:42:22:090AM 970509003 Steve Wolfe FOr shot 3, EF2 U and L.

EF2L single-phasing for a very long time (>4sec). Only got to 500A,
RCUR offset is 10000, which seems to be what it's set at in the PCS
Br_0 offset in PCS is .0055, and phys_a_out signal is .003.
I need to look at the inputs and magnetics data.

May 9 1997 09:17:40:880AM 970509004 Steve Wolfe Shot 4 - try the chopper.
Set for start at -.005 invert at .150, V=700, I=1000
Granetz going into cell to turn on magnetics integrators - they were
off. Will need to check offsets to hybrid again. I knew I should be looking
at the mag signals!

Nothing. Vinnie says he knows why./
Chopper 30V supply is dead again. I wish we knew why this always happens.
The chopper scope in the hybrid.scopes area has some very funny traces.

May 9 1997 09:35:47:230AM 970509005 Steve Wolfe Shot 5 - Changed two fuses in Chopper
Try again.

GOt a pulse. Looks like the Cap bank dumped and the TMX turned off?
It doesn't look like the demand signal is getting through.

Also, the fizzle detector is not in evidence (should be at 0.08 sec).
Fizzle detector went, but it looks lke it may not have made it through to the supply.

May 9 1997 10:00:11:630AM 970509006 Steve Wolfe SHot 6- Turn off the chopper
Try a 5kA OH test, set it so the f.d should take it out at -.1 sec, to test fizzle function.

Seems to have worked. FD took them out on schedule.

OH resistances were 0.9uohm on OH1, lower on OH2's .
Jim's program announced 246.48 uohm because it looks at t=0-, after the fd had taken out the
supplies.

May 9 1997 10:29:59:330AM 970509007 Steve Wolfe Shot 7- OH commutaiton test at 10kA.

Backed out - heat alarm, and they need to go out to turn on the HV supplies for commutation.

Try again- Looks like commutaion worked.
BP12_jk is giving errors - Bob says these are real: need to swap the coil.
F20 partial is ok, despite message.

FD may have worked, with about a 15msec delay? It does start down before .1, which is the
programmed invert time.

Jim says OH resistance is less this time.

May 9 1997 10:47:51:140AM 970509008 Steve Wolfe Shot 8- TF only pulse. Looks good, ~100kA.

Got a gas burst during th e pulse.

May 9 1997 10:50:11:670AM 970509009 Steve Wolfe Shot 9 - TF only 150 kA.

TF looks ok, Got another gas burst.

May 9 1997 11:16:15:290AM 970509010 Steve Wolfe Shot 10 - TF + EF4
Turn on Edge Gas tree nodes, so we can see the burst. Closed off GV3.

TF ok, EF4 ok at -2740amps, anout a 10A imbalance at the end of the pulse.
No ratiomatic data, got device nmot triggered error on store cycle

May 9 1997 11:22:26:900AM 970509011 Steve Wolfe SHot 11 - EF1 again. Looks the same as 2

May 9 1997 11:32:13:660AM 970509012 Steve Wolfe SHot 12 - TF + EF4 in reverse direction.

There seems to be a hardware problem on triggering the f-port ratiomatic. JAS tried a manual
cycle and it still didn't work.

EF4 in + direction looks ok, lots of induced current in EF3, as usual.
TF looks fine at -150kA.
BP26_BC reports a baseline offset 3.3e-01 .

May 9 1997 11:55:59:600AM 970509013 Steve Wolfe SHot 13- TF + EF4 double swing under hybrid control.
start=-1.1, off = +.6, fizzle .7, -3.5 +3 as current limits

No EF4 - Looks like the AFOL signal is not getting to the supply.
BP26_BC is definetely gronked.

Ribbon cable to AFOL in interface room was disconnected.??^((^&($#**$
PUt it back for next shot. Also extend timer on supply for > 1sec pulse.

May 9 1997 12:05:33:180PM 970509014 Steve Wolfe SHot 14- TF + EF4 double swing under hybrid control.
start=-1.1, off = +.6, fizzle .7, -3.5 +3 as current limits

EF4 looks good. It helps to have the hybrid output connected!

May 9 1997 12:19:22:760PM 970509015 Steve Wolfe Shot 15- TF + EF3 PLC control (10KA)
Got 9KA on EF3. Looks fine.

Still getting a gas burst - RGA says it's TEFLON-like ?

May 9 1997 12:34:58:130PM 970509016 Steve Wolfe Shot 16- Try EFC again. with TF this time.
TF invert time to .2 sec, FD to .08

Got current on the chopper . We are now getting demand to it.
Static V is sagging, I don't know why.

May 9 1997 12:56:31:300PM 970509017 Steve Wolfe Shot 17- Try EFC again. with TF this time.
EFC current limit to 2.5kA, fd to .18 sec

Chopper looks ok this time, I think. Maybe. There is some funniness on the bus current,
but it is only digitizing at 1500Hz so it may well be aliased.

May 9 1997 01:21:53:320PM 970509018 Steve Wolfe Shot 18- TF + OH1
OH under hybrid control. Set up for 10kA and turn off all the magnetics feedbacks.

Set up OH1 for -10kA to +10kA swing. back to zero at .718sec
Copy trace to OH2U (really the average)
Extend P gain on OH1, but zero it for OH2U because I don't want to do those with no difference
command.

OH1 only went one way - timed out after 1sec.

May 9 1997 01:33:03:590PM 970509019 Steve Wolfe Shot 19- TF + OH1 Try again.
OH under hybrid control. Set up for 10kA and turn off all the magnetics feedbacks.

Set up OH1 for -10kA to +10kA swing. back to zero at .5sec
Copy trace to OH2U (really the average)
Extend P gain on OH1, but zero it for OH2U because I don't want to do those with no difference
command.

Looks ok, it has a couple KA of overshoot on the + side. I am using only P gain

May 9 1997 01:55:57:600PM 970509020 Steve Wolfe Shot 20- TF + OH1 + OH2's Try again.
OH's under hybrid control. Set up for 10kA and turn off all the magnetics feedbacks except BR_0.

Set up OH1 for -10kA to +10kA swing. back to zero at .5sec
Copy trace to OH2U (really the average)
Extend P gain on OH1 and "OH2U"
Extend gain on BR_0. Which controls the difference.

Looks good. OH2's are well balanced, and the voltages seem to be tracking the demand.

May 9 1997 02:28:10:680PM 970509021 Steve Wolfe Shot 21- TF + OH1 + OH2's + EF4

Minor tweak to EF4 waveform.
Reload RCUR waveform in wire 1, but zero gain

Joe may have gotten the ratiomatic connected again. No he didn't.

Supplies all look ok.

Engineering Operator Comments

Shot Time Type Status Comment

1 07:54:56:040AM Test Ok

2 08:26:09:660AM Test Bad ef1l hash on voltage

3 08:32:28:770AM Test Bad ef2 problems

4 08:59:43:700AM Test Bad efc did not fire

5 09:25:26:100AM Test Bad efcb didn't turn on

6 09:49:00:010AM Test Ok

7 10:16:41:860AM Test Ok

8 10:39:14:960AM Test Ok

9 10:48:23:770AM Test Ok

10 11:05:11:090AM Test Ok

11 11:19:53:600AM Test Ok

12 11:25:58:510AM Test Ok

13 11:37:27:810AM Test Ok

14 11:56:25:670AM Test Ok

15 12:16:43:770PM Test Ok

16 12:27:48:610PM Test Ok

17 12:36:16:640PM Test Ok

18 01:17:03:820PM Test Ok test

19 01:26:09:580PM Test Ok

20 01:44:16:580PM Test Ok

21 02:08:25:160PM Test Ok

Physics Operator Comments
May 9 1997 07:35:31:950AM		Steve Wolfe	Setting up for power tests. We will be excersizing the hybrid today, so I need to check it out again. Last night when I tried, we found the hybrid crate was off-line. Joe Bosco found tre fibers and put them back, following which everything worked, following a coldstart. 07:30 Coldstart ok
May 9 1997 07:49:41:750AM		Steve Wolfe	Start setting up PCS for test shots. Load from 960802010, which was a full hybrid control setup from last campaign. Turn off seg 2. The first candidate for hybrid control is the chopper. Voltage waveform is ramping from .048 to .100, then zero. Initial fast ZCUR gains are D=1, P=2.4 Do a Load_into_model (Load/clean) All messages look ok.
May 9 1997 08:03:40:660AM	970509001	Steve Wolfe	First test shot. Only Engineering tree is in the Cmod_manage list, so there won't be a lot of data. EF1U amd L test. 2kA PLC Current waveforms look ok. Not seeing the Supply voltages yet. Looks like a screw-up on the digitizer setups. We are seeing voltages on EF2 supplies. Also, Vinnies power supply control panel blew away with a message about parent of node is off, on setting EF2U.
May 9 1997 08:32:36:680AM	970509002	Steve Wolfe	FOr shot 2, include mhd::magnetics, mhd::analysis, and hybrid. TWF being consulted on tree setup, control panel. Repeat of shot 1 - EFIU&L PLC test. Got CAMAC this time, EF1L voltage is very hashy. Fast ZCUR seems to have an offset of 2000 (phys_a_out scope). Br0 at .004.
May 9 1997 08:42:22:090AM	970509003	Steve Wolfe	FOr shot 3, EF2 U and L. EF2L single-phasing for a very long time (>4sec). Only got to 500A, RCUR offset is 10000, which seems to be what it's set at in the PCS Br_0 offset in PCS is .0055, and phys_a_out signal is .003. I need to look at the inputs and magnetics data.
May 9 1997 09:17:40:880AM	970509004	Steve Wolfe	Shot 4 - try the chopper. Set for start at -.005 invert at .150, V=700, I=1000 Granetz going into cell to turn on magnetics integrators - they were off. Will need to check offsets to hybrid again. I knew I should be looking at the mag signals! Nothing. Vinnie says he knows why./ Chopper 30V supply is dead again. I wish we knew why this always happens. The chopper scope in the hybrid.scopes area has some very funny traces.
May 9 1997 09:35:47:230AM	970509005	Steve Wolfe	Shot 5 - Changed two fuses in Chopper Try again. GOt a pulse. Looks like the Cap bank dumped and the TMX turned off? It doesn't look like the demand signal is getting through. Also, the fizzle detector is not in evidence (should be at 0.08 sec). Fizzle detector went, but it looks lke it may not have made it through to the supply.
May 9 1997 10:00:11:630AM	970509006	Steve Wolfe	SHot 6- Turn off the chopper Try a 5kA OH test, set it so the f.d should take it out at -.1 sec, to test fizzle function. Seems to have worked. FD took them out on schedule. OH resistances were 0.9uohm on OH1, lower on OH2's . Jim's program announced 246.48 uohm because it looks at t=0-, after the fd had taken out the supplies.
May 9 1997 10:29:59:330AM	970509007	Steve Wolfe	Shot 7- OH commutaiton test at 10kA. Backed out - heat alarm, and they need to go out to turn on the HV supplies for commutation. Try again- Looks like commutaion worked. BP12_jk is giving errors - Bob says these are real: need to swap the coil. F20 partial is ok, despite message. FD may have worked, with about a 15msec delay? It does start down before .1, which is the programmed invert time. Jim says OH resistance is less this time.
May 9 1997 10:47:51:140AM	970509008	Steve Wolfe	Shot 8- TF only pulse. Looks good, ~100kA. Got a gas burst during th e pulse.
May 9 1997 10:50:11:670AM	970509009	Steve Wolfe	Shot 9 - TF only 150 kA. TF looks ok, Got another gas burst.
May 9 1997 11:16:15:290AM	970509010	Steve Wolfe	Shot 10 - TF + EF4 Turn on Edge Gas tree nodes, so we can see the burst. Closed off GV3. TF ok, EF4 ok at -2740amps, anout a 10A imbalance at the end of the pulse. No ratiomatic data, got device nmot triggered error on store cycle
May 9 1997 11:22:26:900AM	970509011	Steve Wolfe	SHot 11 - EF1 again. Looks the same as 2
May 9 1997 11:32:13:660AM	970509012	Steve Wolfe	SHot 12 - TF + EF4 in reverse direction. There seems to be a hardware problem on triggering the f-port ratiomatic. JAS tried a manual cycle and it still didn't work. EF4 in + direction looks ok, lots of induced current in EF3, as usual. TF looks fine at -150kA. BP26_BC reports a baseline offset 3.3e-01 .
May 9 1997 11:55:59:600AM	970509013	Steve Wolfe	SHot 13- TF + EF4 double swing under hybrid control. start=-1.1, off = +.6, fizzle .7, -3.5 +3 as current limits No EF4 - Looks like the AFOL signal is not getting to the supply. BP26_BC is definetely gronked. Ribbon cable to AFOL in interface room was disconnected.??^((^&($#**$ PUt it back for next shot. Also extend timer on supply for > 1sec pulse.
May 9 1997 12:05:33:180PM	970509014	Steve Wolfe	SHot 14- TF + EF4 double swing under hybrid control. start=-1.1, off = +.6, fizzle .7, -3.5 +3 as current limits EF4 looks good. It helps to have the hybrid output connected!
May 9 1997 12:19:22:760PM	970509015	Steve Wolfe	Shot 15- TF + EF3 PLC control (10KA) Got 9KA on EF3. Looks fine. Still getting a gas burst - RGA says it's TEFLON-like ?
May 9 1997 12:34:58:130PM	970509016	Steve Wolfe	Shot 16- Try EFC again. with TF this time. TF invert time to .2 sec, FD to .08 Got current on the chopper . We are now getting demand to it. Static V is sagging, I don't know why.
May 9 1997 12:56:31:300PM	970509017	Steve Wolfe	Shot 17- Try EFC again. with TF this time. EFC current limit to 2.5kA, fd to .18 sec Chopper looks ok this time, I think. Maybe. There is some funniness on the bus current, but it is only digitizing at 1500Hz so it may well be aliased.
May 9 1997 01:21:53:320PM	970509018	Steve Wolfe	Shot 18- TF + OH1 OH under hybrid control. Set up for 10kA and turn off all the magnetics feedbacks. Set up OH1 for -10kA to +10kA swing. back to zero at .718sec Copy trace to OH2U (really the average) Extend P gain on OH1, but zero it for OH2U because I don't want to do those with no difference command. OH1 only went one way - timed out after 1sec.
May 9 1997 01:33:03:590PM	970509019	Steve Wolfe	Shot 19- TF + OH1 Try again. OH under hybrid control. Set up for 10kA and turn off all the magnetics feedbacks. Set up OH1 for -10kA to +10kA swing. back to zero at .5sec Copy trace to OH2U (really the average) Extend P gain on OH1, but zero it for OH2U because I don't want to do those with no difference command. Looks ok, it has a couple KA of overshoot on the + side. I am using only P gain
May 9 1997 01:55:57:600PM	970509020	Steve Wolfe	Shot 20- TF + OH1 + OH2's Try again. OH's under hybrid control. Set up for 10kA and turn off all the magnetics feedbacks except BR_0. Set up OH1 for -10kA to +10kA swing. back to zero at .5sec Copy trace to OH2U (really the average) Extend P gain on OH1 and "OH2U" Extend gain on BR_0. Which controls the difference. Looks good. OH2's are well balanced, and the voltages seem to be tracking the demand.
May 9 1997 02:28:10:680PM	970509021	Steve Wolfe	Shot 21- TF + OH1 + OH2's + EF4 Minor tweak to EF4 waveform. Reload RCUR waveform in wire 1, but zero gain Joe may have gotten the ratiomatic connected again. No he didn't. Supplies all look ok.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	07:54:56:040AM	Test	Ok
2	08:26:09:660AM	Test	Bad	ef1l hash on voltage
3	08:32:28:770AM	Test	Bad	ef2 problems
4	08:59:43:700AM	Test	Bad	efc did not fire
5	09:25:26:100AM	Test	Bad	efcb didn't turn on
6	09:49:00:010AM	Test	Ok
7	10:16:41:860AM	Test	Ok
8	10:39:14:960AM	Test	Ok
9	10:48:23:770AM	Test	Ok
10	11:05:11:090AM	Test	Ok
11	11:19:53:600AM	Test	Ok
12	11:25:58:510AM	Test	Ok
13	11:37:27:810AM	Test	Ok
14	11:56:25:670AM	Test	Ok
15	12:16:43:770PM	Test	Ok
16	12:27:48:610PM	Test	Ok
17	12:36:16:640PM	Test	Ok
18	01:17:03:820PM	Test	Ok	test
19	01:26:09:580PM	Test	Ok
20	01:44:16:580PM	Test	Ok
21	02:08:25:160PM	Test	Ok