Alcator C-Mod Run 950117 Information

Miniproposals

Miniproposal: 043

Date Filed: 3/31/1994

Title: Effect of edge radiation on divertor detachment

First Author: Gary McCracken

Session Leader: Gary McCracken (shots 1-16)

Operators
Session leader(s):	Gary McCracken
Physics operator(s):	Steve Horne
Engineering operator(s):	Bob Childs

Engineering Operator Run Comment
EF4Tests.

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments

Jan 17 1995 06:12:20:370PM Gary McCracken Calibration of B-side upper piezo valve

R Childs, S Horne, G McCracken

This exercise is in support of MP 043
During run 950111 we carried out a series of neon injections into the
plasma through the B-side upper valve. The present run is to calibrate
the amount of neon injected. We set up the hybrid to enable the B-side
upper valve. We then set up the following trees,
Spectroscopy - to record the vlave voltage
Edge - to record the gauge data
Engineering
Hybrid
Most of the trees were disabled so that we only collected the necessary
data. It was also necessary to disable the fizzle detector. Just before
the shot the turbo pump valves GV1 and GV2 were closed to minimize the
pumping effects on the measured pressure. The cryopump valve GV1 was
shut throughout the run.

Jan 17 1995 06:27:56:580PM Gary McCracken The pressure rises quoted were measured on the F-side ratiomatic. On
the last 2 pulses we got good measurement on the MKS side gauge which
indicated that with the standard ratiomatic calibration figure the
ratiomatics were reading about a factor 2 too low. A successful
calibration

Jan 17 1995 06:13:30:270PM 950117002 Gary McCracken 002 no gas in

Jan 17 1995 06:13:51:510PM 950117003 Gary McCracken No gas in

Jan 17 1995 06:14:04:410PM 950117004 Gary McCracken No gas in

Jan 17 1995 06:17:27:920PM 950117005 Gary McCracken Turn fizzle detector off! Plenum pressure 2.94 psi
valve voltage pulse length 20 ms . Good gas injection.
pressure rise ~3e-6 torr but decayed rapidly. GV1 and GV2 still open

Jan 17 1995 06:18:33:000PM 950117006 Gary McCracken Plenum pressure 2.94 psi GV1 and GV2 shut
valve voltage pulse length 20 ms . Good gas injection.
pressure rise ~5e-6 torr and stayed up

Jan 17 1995 06:19:43:480PM 950117007 Gary McCracken Plenum pressure 2.94 psi GV1 and GV2 shut
valve voltage pulse length 30 ms . Good gas injection.
pressure rise 5e-6 torr

Jan 17 1995 06:20:06:580PM 950117008 Gary McCracken Plenum pressure 2.94 psi GV1 and GV2 shut
valve voltage pulse length 40 ms . Good gas injection.
pressure rise 7e-6 torr

Jan 17 1995 06:20:29:550PM 950117009 Gary McCracken Plenum pressure 2.94 psi GV1 and GV2 shut
valve voltage pulse length 45 ms . Good gas injection.
pressure rise 8e-6 torr

Jan 17 1995 06:20:50:670PM 950117010 Gary McCracken Plenum pressure 2.94 psi GV1 and GV2 shut
valve voltage pulse length 50 ms . Good gas injection.
pressure rise 9e-6 torr

Jan 17 1995 06:21:12:740PM 950117011 Gary McCracken Plenum pressure 2.94 psi GV1 and GV2 shut
valve voltage pulse length 60 ms . Good gas injection.
pressure rise 1.06e-6 torr

Jan 17 1995 06:22:22:810PM 950117012 Gary McCracken Plenum pressure 5.02 psi GV1 and GV2 shut
valve voltage pulse length 30 ms . Good gas injection.
pressure rise 1.1e-5 torr

Jan 17 1995 06:22:48:920PM 950117013 Gary McCracken Plenum pressure 5.02 psi GV1 and GV2 shut
valve voltage pulse length 60 ms . Good gas injection.
pressure rise 2.3e-5 torr

Jan 17 1995 06:23:30:680PM 950117014 Gary McCracken Plenum pressure 19.4 psi GV1 and GV2 shut
valve voltage pulse length 100 ms . Good gas injection.
pressure rise 2e-4 torr

Jan 17 1995 06:24:08:270PM 950117015 Gary McCracken Plenum pressure 19.4 psi GV1 and GV2 shut
valve voltage pulse length 500 ms . Good gas injection.
pressure rise 1.08e-3 torr

Jan 17 1995 06:24:44:950PM 950117016 Gary McCracken Plenum pressure 19.4 psi GV1 and GV2 shut
valve voltage pulse length 1000 ms . Good gas injection.
pressure rise 2.1e-3 torr

Physics Operator Comments

Engineering Operator Comments

Shot Time Type Status Comment

1 10:43:35:620AM Test Ok EF4 REV O.K.

2 04:07:09:970PM Test Ok test

3 04:24:18:110PM Test Ok

4 04:31:48:410PM Test Ok

5 04:38:56:160PM Test Ok

6 04:42:21:290PM Test Ok

7 04:48:49:970PM Test Ok

8 04:53:07:950PM Test Ok

9 04:58:53:990PM Test Ok

10 05:03:58:320PM Test Ok

11 05:08:28:160PM Test Ok

12 05:13:51:070PM Test Ok

13 05:18:10:240PM Test Ok

14 05:25:54:840PM Test Ok

15 05:31:46:410PM Test Ok

16 05:38:52:460PM Test Ok

Session Leader Comments
Jan 17 1995 06:12:20:370PM		Gary McCracken	Calibration of B-side upper piezo valve R Childs, S Horne, G McCracken This exercise is in support of MP 043 During run 950111 we carried out a series of neon injections into the plasma through the B-side upper valve. The present run is to calibrate the amount of neon injected. We set up the hybrid to enable the B-side upper valve. We then set up the following trees, Spectroscopy - to record the vlave voltage Edge - to record the gauge data Engineering Hybrid Most of the trees were disabled so that we only collected the necessary data. It was also necessary to disable the fizzle detector. Just before the shot the turbo pump valves GV1 and GV2 were closed to minimize the pumping effects on the measured pressure. The cryopump valve GV1 was shut throughout the run.
Jan 17 1995 06:27:56:580PM		Gary McCracken	The pressure rises quoted were measured on the F-side ratiomatic. On the last 2 pulses we got good measurement on the MKS side gauge which indicated that with the standard ratiomatic calibration figure the ratiomatics were reading about a factor 2 too low. A successful calibration
Jan 17 1995 06:13:30:270PM	950117002	Gary McCracken	002 no gas in
Jan 17 1995 06:13:51:510PM	950117003	Gary McCracken	No gas in
Jan 17 1995 06:14:04:410PM	950117004	Gary McCracken	No gas in
Jan 17 1995 06:17:27:920PM	950117005	Gary McCracken	Turn fizzle detector off! Plenum pressure 2.94 psi valve voltage pulse length 20 ms . Good gas injection. pressure rise ~3e-6 torr but decayed rapidly. GV1 and GV2 still open
Jan 17 1995 06:18:33:000PM	950117006	Gary McCracken	Plenum pressure 2.94 psi GV1 and GV2 shut valve voltage pulse length 20 ms . Good gas injection. pressure rise ~5e-6 torr and stayed up
Jan 17 1995 06:19:43:480PM	950117007	Gary McCracken	Plenum pressure 2.94 psi GV1 and GV2 shut valve voltage pulse length 30 ms . Good gas injection. pressure rise 5e-6 torr
Jan 17 1995 06:20:06:580PM	950117008	Gary McCracken	Plenum pressure 2.94 psi GV1 and GV2 shut valve voltage pulse length 40 ms . Good gas injection. pressure rise 7e-6 torr
Jan 17 1995 06:20:29:550PM	950117009	Gary McCracken	Plenum pressure 2.94 psi GV1 and GV2 shut valve voltage pulse length 45 ms . Good gas injection. pressure rise 8e-6 torr
Jan 17 1995 06:20:50:670PM	950117010	Gary McCracken	Plenum pressure 2.94 psi GV1 and GV2 shut valve voltage pulse length 50 ms . Good gas injection. pressure rise 9e-6 torr
Jan 17 1995 06:21:12:740PM	950117011	Gary McCracken	Plenum pressure 2.94 psi GV1 and GV2 shut valve voltage pulse length 60 ms . Good gas injection. pressure rise 1.06e-6 torr
Jan 17 1995 06:22:22:810PM	950117012	Gary McCracken	Plenum pressure 5.02 psi GV1 and GV2 shut valve voltage pulse length 30 ms . Good gas injection. pressure rise 1.1e-5 torr
Jan 17 1995 06:22:48:920PM	950117013	Gary McCracken	Plenum pressure 5.02 psi GV1 and GV2 shut valve voltage pulse length 60 ms . Good gas injection. pressure rise 2.3e-5 torr
Jan 17 1995 06:23:30:680PM	950117014	Gary McCracken	Plenum pressure 19.4 psi GV1 and GV2 shut valve voltage pulse length 100 ms . Good gas injection. pressure rise 2e-4 torr
Jan 17 1995 06:24:08:270PM	950117015	Gary McCracken	Plenum pressure 19.4 psi GV1 and GV2 shut valve voltage pulse length 500 ms . Good gas injection. pressure rise 1.08e-3 torr
Jan 17 1995 06:24:44:950PM	950117016	Gary McCracken	Plenum pressure 19.4 psi GV1 and GV2 shut valve voltage pulse length 1000 ms . Good gas injection. pressure rise 2.1e-3 torr

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	10:43:35:620AM	Test	Ok	EF4 REV O.K.
2	04:07:09:970PM	Test	Ok	test
3	04:24:18:110PM	Test	Ok
4	04:31:48:410PM	Test	Ok
5	04:38:56:160PM	Test	Ok
6	04:42:21:290PM	Test	Ok
7	04:48:49:970PM	Test	Ok
8	04:53:07:950PM	Test	Ok
9	04:58:53:990PM	Test	Ok
10	05:03:58:320PM	Test	Ok
11	05:08:28:160PM	Test	Ok
12	05:13:51:070PM	Test	Ok
13	05:18:10:240PM	Test	Ok
14	05:25:54:840PM	Test	Ok
15	05:31:46:410PM	Test	Ok
16	05:38:52:460PM	Test	Ok