Alcator C-Mod Run 941116 Information

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Miniproposals
Miniproposal:
Date Filed:
Title:
First Author:
Session Leader:Steve Horne (shots 1-22)

Operators
Session leader(s):Steve Horne
Physics operator(s):Ian Hutchinson
Engineering operator(s):Vinny Bertolino,Joe Daigle

Engineering Operator Run Comment
data aquisition and coil tests.

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries
Entered: Jul 7 2004 04:36:52:007PM
Author: To Be Determined
Session Leader report - Horne, Hutchinson, Daigle, Bertolino.

This run tested power supplies under PLC control, one system at a time,
with precautions to avoid inducing current in coils not under test.
The objective was to generate a clean set of data to verify
the magnetics against the shunts and rogowskis.

The gas system (fill and puff from hybrid on pulse_gas_3)
were tested and they worked.

Apparently F16 is ailing. However, F13 seems to be ok. We think we can
patch together enough information about the flux in this region from the
remaining loops; this will be critical for analyzing startup nulls.
The loss of F16 should be less important once we get plasma.

I turned f16 off in the hybrid tree, and turned on f13 and f17.
We'll need to re-run the algorithms again to pick up these changes.

I did some analysis of the magnetics vs coil currents during the run;
the error we saw in IH1 has been significantly reduced; this implies
that the various integrator calibrations we did were important.
The only significant error was the EF2U current; the magnetics
claim there's 5% less current here than the rogowski claims.



Shot list --

1 test data system

2. load the fiducial 940624001, call all algorithms, restore all offsets

WIRE OFFSET
rcur 10000
zcur 10000
zxl 0.
rxl 0.
clearin 0.
br 2.5e-3
kappa 0.
ONLY DO SEGMENT 1, SINCE THAT'S ALL THAT'S USED FOR THE FIDUCIAL.
Looked ok, but some afols are off.

3. OK Data system, hybrid are working.
===== Plc Power Tests Start!!!=====

4. OH2 U 10KA PLC CONTROL
Simulation shows better agreement between rogowskis and magnetics!!

5. same, reverse polarity. Current starts at -.5
gas prefill seems to work.

6. OH2 L .

7. Extend invert to 1.1 sec, but set fizzle on at sec. This should
verify that fizzle works.
Also check hybrid puff. Both worked. (pulse_gas_3)
Magnetics don't agree very well.<===============

8. OH1 positive. Worked; some induced EF3.
Magnetics check looks good!
9 OH1 negative . No induction.

10. EF1 U, 8 ka FAULT, CROWBAR.
flux loop 16 is FUNNY? <=========

11 same, 6ka . worked.

12 same, reverse polarity

13 ef1l

14 ef1l reverse

15 tf only, at 150 ka.

16 REPEAT. Bob didn't integrate long enough.

17 ef3

18 EF2U. LOTS OF INDUCED CURRENTS.

19 ef2l

20 ef4

21 ef4 reverse

22 Repeat 18 with no induced currents.

Session Leader Comments

Physics Operator Comments

Engineering Operator Comments
ShotTimeTypeStatusComment
109:59:05:930AMTestOk
211:03:55:960AMTestOk
311:16:19:550AMTestOkdata
402:03:12:140PMTestOkGood shot
502:15:43:270PMTestOkOH2u rev o.k.
602:27:29:040PMTestOkOH2 l forward O,K,
702:39:32:460PMTestOkOH2L rev O.K.
802:50:32:270PMTestOkOH1 forward
903:00:10:180PMTestOkOH1 REV O.K.
1003:09:39:640PMTestBadEF1 u one SCR not conducting.
1103:20:20:010PMTestOkEf1 U forward O.K.
1203:29:36:090PMTestOkEF1 U REV O.K.
1303:40:46:290PMTestOkEF1L FORWARD O.K.
1403:52:06:420PMTestOkEF1REV O.K.
1504:02:17:100PMTestOkTF 150KA
1604:11:57:980PMTestOkTF 150KA
1704:19:04:590PMTestOkEF3 8KA LIMIT
1804:31:26:230PMTestOkEF2U 3KA
1904:39:09:090PMTestOkEF2L 3KA
2004:45:22:920PMTestOkEF4 FWD
2104:55:39:840PMTestOkEF4 REV 3KA
2205:00:34:740PMTestOkEF2U 3KA