Alcator C-Mod Run 1020827 Information

Miniproposals

Miniproposal: 301

Date Filed: 6/21/2002

Title: ITB Foot Location Movement via I

First Author: John Rice

Session Leader: John Rice (shots 1-33)

Operators
Session leader(s):	John Rice
Physics operator(s):	Ian Hutchinson
Engineering operator(s):	Unknown

Engineering Operator Run Comment
MP301 ITB Foot, Ip Scan Revisited. Hutchinson

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:30:007PM

Author: To Be Determined

Session Leader Run Summary for 1020827 MP301* ITB Foot, Ip Scan

There were no ITB discharges in this run, and the H-modes were of
poor quality, presumably due to high radiated power, presumably
due to molybdenum. As such, no progress was made on MP301*.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:15:940PM

Author: To Be Determined

Physop 1020827

SL Rice
PO Hutch

MP301* ITB Foot, Ip Scan Revisited
-

Summary
_______

A difficult day of trying to get decent 4.5T ITBs without success. We
showed that the radiation is too great. According to Rice it is mostly
molybdenum. We showed that Ar at 40ms puff is enough even in these
quite dirty plasmas to increase the radiation by 30 or 40%. Argon 30ms
is more reasonable, and actually shot 27 which had 30ms is one of the
best at 5.3T. In order to test the machine condition, we went back up
to 5.3T and were able to get EDA plasmas, but the confinement was
rather bad, H-factors of order 1. This means that either the effective
power is a lot lower than we think, or there is very poor confinement.
Shot 28 claims to have 2.9MW out of D and E combined. The plasma looks
more as if it has about half of that.

Rather a lot of fizzles were experienced. The field evolution was
subject to drifts in level and shape that took quite a lot of tweaks
to fix. There were no outside bounces till shot 27; so that probably
means I was running with Bz too high. The interferometer was barely
working all day, and wasted several shots. We thus went to
preprogrammed gas from shot 11 on. Despite zero gain, there seemed to
be some feed-though from big nl04 excursions, so the controller was
also zeroed.

Loaded a shot for beam into gas after shot 28. Don't use those for plasmas.

Recommendation
______________

We need to investigate why the plasma performance is apparently so bad.
Is it poor absorption, high radiation, or bad confinement? Boronization
might help, but we ought to see what the cause is anyway.

Scorecard
_________

Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax
1 0.000 0.027 2 1.952 0.805
3 1.954 0.803 4 1.949 0.805
5 1.904 0.797 6 0.000 0.031
7 1.730 0.812 8 0.000 0.030
9 1.909 0.801 10 0.000 0.031
11 1.882 0.817 12 0.000 0.034
13 1.899 0.799 14 1.892 0.798
15 1.896 0.798 16 1.901 0.811
17 1.947 0.821 18 1.948 0.813
19 1.947 0.812 20 1.927 0.811
21 1.912 0.813 22 1.778 0.806
23 0.000 0.033 24 1.912 0.729
25 1.780 0.810 26 0.000 0.045
27 1.852 0.812 28 1.785 0.813

Finished summary for 1020827 Total of 28 shots.
28 shots. 21 plasmas. 7 fizzles.

Details
_______
1020827xxx hutch PHYSICS_OPERATOR Aug 27 2002 8:26:38:880AM
. . . . . . . . . . . . . . . . . . . .
SL Rice
PO Hutch

MP301* ITB Foot, Ip Scan Revisited

Setup as for 1020823003

ECE for 1 hour early, ending 7am.

RF conditioning till 8:40

ECDC from 8:40 to 8:55
----------------------------------------------------------------------------
1020827xxx hutch PHYSICS_OPERATOR Aug 27 2002 9:31:17:376AM
. . . . . . . . . . . . . . . . . . . .
Load from 1020823003
Ip offset to -35000.
Load.
Load segment 3 from 1020820024 segment 2.
----------------------------------------------------------------------------
1020827001 hutch PHYSICS_OPERATOR Aug 27 2002 9:44:07:800AM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Nothing really bad. Just a slightly too slow current ramp for the
Bz ramp rate.

Lower fill puff to 32ms from 35.
----------------------------------------------------------------------------
1020827002 hutch PHYSICS_OPERATOR Aug 27 2002 9:57:00:236AM
. . . . . . . . . . . . . . . . . . . .
Plasma. J-port ok but a lot of radiation. D trips.

Increase clearin by 2mm.
----------------------------------------------------------------------------
1020827003 hutch PHYSICS_OPERATOR Aug 27 2002 10:26:22:830AM
. . . . . . . . . . . . . . . . . . . .
Plasma. D no power. E 1MW just gets into H-mode.

Add further 3 mm to clearin, 1.5mm to rcur.
Move EF1 crowbar to .13s.
PCS crashed.
Copy segment 3 EF1 Vs to segment 2.
Redo the clearin and rcur changes.
ICEF4 to -1310 from -1315A
Load
----------------------------------------------------------------------------
1020827004 hutch PHYSICS_OPERATOR Aug 27 2002 10:44:19:506AM
. . . . . . . . . . . . . . . . . . . .
Plasma. ELM free at 2MW.

Argon down to 30ms from 40ms.
NL04 to .9e20
----------------------------------------------------------------------------
1020827005 hutch PHYSICS_OPERATOR Aug 27 2002 11:00:08:960AM
. . . . . . . . . . . . . . . . . . . .
Plasma. Radiation drops by about 30%.

Lower nl04 down to .8 again
Raise lower loast Rcur point by 1mm.
Copy from seg 3 to seg 2 rxu and zxl.
----------------------------------------------------------------------------
1020827006 hutch PHYSICS_OPERATOR Aug 27 2002 11:12:38:523AM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

ICEF4 to -1300A.
----------------------------------------------------------------------------
1020827007 hutch PHYSICS_OPERATOR Aug 27 2002 11:24:58:180AM
. . . . . . . . . . . . . . . . . . . .
Plasma. Density control is screwed.
No gas puff till very late

Repeat
----------------------------------------------------------------------------
1020827008 hutch PHYSICS_OPERATOR Aug 27 2002 11:39:39:756AM
. . . . . . . . . . . . . . . . . . . .
Fizzle

ICEF4 to -1305A
Rcur offset to 3800 from 3600.
----------------------------------------------------------------------------
1020827009 hutch PHYSICS_OPERATOR Aug 27 2002 11:52:48:163AM
. . . . . . . . . . . . . . . . . . . .
Plasma. H-modes. D-port erratic.

Rcur offset to 4500 from 3800 (seg 1)
----------------------------------------------------------------------------
1020827010 hutch PHYSICS_OPERATOR Aug 27 2002 12:06:47:476PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Fill puff to 30ms from 32.
rcur to .683 at 1ms.
zxl to +.03 at .1s
----------------------------------------------------------------------------
1020827011 hutch PHYSICS_OPERATOR Aug 27 2002 12:21:35:726PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Density feedback broken again.

Turn off nl04.
Preprogram PG3
move rcur poin tto .2s to allow earlier outward motion.
Move rxl in by a few mm to lower strike point.
----------------------------------------------------------------------------
1020827012 hutch PHYSICS_OPERATOR Aug 27 2002 1:12:45:926PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

ICEF4 to -1315 from -1305A
rcur to .687 from .683.
Power glitch.
rcur offset back to 3600
Move clearin ramp earlier around .1-.2s
----------------------------------------------------------------------------
1020827013 hutch PHYSICS_OPERATOR Aug 27 2002 1:23:52:020PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Lower gas puff
rcur to .69 at 1ms.
----------------------------------------------------------------------------
1020827014 hutch PHYSICS_OPERATOR Aug 27 2002 1:32:27:276PM
. . . . . . . . . . . . . . . . . . . .
Plasma Some signs of ITB, but a bit late.
Gas went up a bit (contrary to programming).

Lower pulse gas
rcur to .695 at 1ms.
----------------------------------------------------------------------------
1020827015 hutch PHYSICS_OPERATOR Aug 27 2002 1:49:49:796PM
. . . . . . . . . . . . . . . . . . . .
Plasma H-mode at 1s. nl04 goes berserk.

Raise Bz. TF current from 125700 to 140000
Attempt to establish more vanilla H-modes.
Reduce gas some more.
----------------------------------------------------------------------------
1020827017 hutch PHYSICS_OPERATOR Aug 27 2002 2:22:02:430PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Gas does not get injected even though there
was no change from the previous shot. Strong radiation.
Seems that the gas M-out is responding to the erroneous nl04
signal despite the fact that all gains are zero.

Do cold start
Did not load
----------------------------------------------------------------------------
1020827016 hutch PHYSICS_OPERATOR Aug 27 2002 2:22:17:053PM
. . . . . . . . . . . . . . . . . . . .
Plasma 5T. H-modes are radiative and not sustained.
But H-mode is achieved immediately.

Lower Ar to 10ms. (Effectively off).
PG3 to 25 from 30 later in the shot.
rxl to 2mm. It was roughly 8mm peak.
----------------------------------------------------------------------------
1020827018 hutch PHYSICS_OPERATOR Aug 27 2002 2:45:13:020PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Got about .6 target density.

Zeroed the nl04 controller.
TF to 150kA.
Raise PG3
----------------------------------------------------------------------------
1020827019 hutch PHYSICS_OPERATOR Aug 27 2002 2:58:19:360PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Somewhat better. Still radiation.

Rxl to 0mm. Change the strike point even lower.
----------------------------------------------------------------------------
1020827020 hutch PHYSICS_OPERATOR Aug 27 2002 3:12:37:316PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Best H-mode so far today.

RXL to -.003
----------------------------------------------------------------------------
1020827021 hutch PHYSICS_OPERATOR Aug 27 2002 3:26:53:660PM
. . . . . . . . . . . . . . . . . . . .
Plasma. EDA for 0.5s

TF to 125700A.
RXL to -6mm.
----------------------------------------------------------------------------
1020827022 hutch PHYSICS_OPERATOR Aug 27 2002 3:48:05:073PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Radiation is the problem. Mo according to Rice.

ECDC for 5 minutes.
Ip to 0.7MA
----------------------------------------------------------------------------
1020827023 hutch PHYSICS_OPERATOR Aug 27 2002 4:07:14:986PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Remind me not to do ECDC between shots.

----------------------------------------------------------------------------
1020827024 hutch PHYSICS_OPERATOR Aug 27 2002 4:22:40:786PM
. . . . . . . . . . . . . . . . . . . .
Plasma. .7MA does not overcome the radiation.

TF to 150000
IP to .8MA
Allow ninja to fire early.
ICef4 to -1315A
----------------------------------------------------------------------------
1020827025 hutch PHYSICS_OPERATOR Aug 27 2002 4:31:03:576PM
. . . . . . . . . . . . . . . . . . . .
Plasma .5s EDA

Ar to 30 ms.
RXL top -9mm.
----------------------------------------------------------------------------
1020827026 hutch PHYSICS_OPERATOR Aug 27 2002 4:51:01:240PM
. . . . . . . . . . . . . . . . . . . .
Fizzle despite reaching 30kA.

rcur to .697
----------------------------------------------------------------------------
1020827027 hutch PHYSICS_OPERATOR Aug 27 2002 5:09:27:840PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Nice shot. RF stays on. Still poor confinement.

RXL to -12mm.
----------------------------------------------------------------------------
1020827028 hutch PHYSICS_OPERATOR Aug 27 2002 5:18:30:960PM
. . . . . . . . . . . . . . . . . . . .
Plasma. 2.9MW from D and E. 4.9MW total briefly.

Session Leader Comments

Aug 27 2002 09:35:27:633AM 1020827001 John Rice phizzle

Aug 27 2002 09:49:10:757AM 1020827002 John Rice early H-mode with J and E, no ITB

Aug 27 2002 10:11:40:843AM 1020827003 John Rice 1 MW from E (only), late H-mode

Aug 27 2002 12:06:03:193PM 1020827004 John Rice D and E, some H-modes and trips

Aug 27 2002 12:06:52:930PM 1020827005 John Rice reduce argon, late H-mode

Aug 27 2002 12:07:13:760PM 1020827006 John Rice phizzle

Aug 27 2002 12:08:17:947PM 1020827007 John Rice lousy H-modes

Aug 27 2002 12:08:47:023PM 1020827008 John Rice $\phi$ izzle

Aug 27 2002 12:09:42:027PM 1020827009 John Rice multiple RF trips

Aug 27 2002 12:10:17:247PM 1020827010 John Rice fizzle

Aug 27 2002 12:11:24:793PM 1020827011 John Rice low density, late H-mode

Aug 27 2002 12:21:40:523PM 1020827012 John Rice $\phi$izzle

Aug 27 2002 01:08:15:937PM 1020827013 John Rice multiple trips

Aug 27 2002 01:23:01:500PM 1020827014 John Rice very late H-mode, ITB trying to form at the end

Aug 27 2002 01:42:15:117PM 1020827015 John Rice very late H-mode, multiple trips

Aug 27 2002 01:50:53:737PM 1020827016 John Rice earlier H-mode from raising TF, multiple trips

Aug 27 2002 02:10:36:133PM 1020827017 John Rice earlier H-mode from raising TF, lower density, argon off

Aug 27 2002 02:30:28:407PM 1020827018 John Rice earlier H-mode from raising TF, lower density, argon off, multiple trips

Aug 27 2002 02:49:30:367PM 1020827019 John Rice earlier H-mode from raising TF

Aug 27 2002 03:06:34:387PM 1020827020 John Rice halfway decent H-mode

Aug 27 2002 03:13:56:690PM 1020827021 John Rice halfway decent EDA H-mode

Aug 27 2002 03:31:27:477PM 1020827022 John Rice lower TF, crappy H-mode, multiple trips

Aug 27 2002 03:48:05:980PM 1020827023 John Rice fizzle

Aug 27 2002 04:03:31:610PM 1020827024 John Rice lower current, multiple trips

Aug 27 2002 04:16:09:153PM 1020827025 John Rice higher field, better H-mode

Aug 27 2002 04:28:27:903PM 1020827026 John Rice phizzle

Aug 27 2002 04:51:34:243PM 1020827027 John Rice better H-mode

Aug 27 2002 05:01:11:427PM 1020827028 John Rice decent H-mode

Physics Operator Comments

Aug 27 2002 08:26:38:880AM Ian Hutchinson SL Rice
PO Hutch

MP301* ITB Foot, Ip Scan Revisited

Setup as for 1020823003

ECE for 1 hour early, ending 7am.

RF conditioning till 8:40

ECDC from 8:40 to 8:55

Aug 27 2002 09:31:17:377AM Ian Hutchinson Load from 1020823003
Ip offset to -35000.
Load.
Load segment 3 from 1020820024 segment 2.

Aug 27 2002 09:44:07:800AM 1020827001 Ian Hutchinson Fizzle. Nothing really bad. Just a slightly too slow current ramp for the
Bz ramp rate.

Lower fill puff to 32ms from 35.

Aug 27 2002 09:57:00:237AM 1020827002 Ian Hutchinson Plasma. J-port ok but a lot of radiation. D trips.

Increase clearin by 2mm.

Aug 27 2002 10:26:22:830AM 1020827003 Ian Hutchinson Plasma. D no power. E 1MW just gets into H-mode.

Add further 3 mm to clearin, 1.5mm to rcur.
Move EF1 crowbar to .13s.
PCS crashed.
Copy segment 3 EF1 Vs to segment 2.
Redo the clearin and rcur changes.
ICEF4 to -1310 from -1315A
Load

Aug 27 2002 10:44:19:507AM 1020827004 Ian Hutchinson Plasma. ELM free at 2MW.

Argon down to 30ms from 40ms.
NL04 to .9e20

Aug 27 2002 11:00:08:960AM 1020827005 Ian Hutchinson Plasma. Radiation drops by about 30%.

Lower nl04 down to .8 again
Raise lower loast Rcur point by 1mm.
Copy from seg 3 to seg 2 rxu and zxl.

Aug 27 2002 11:12:38:523AM 1020827006 Ian Hutchinson Fizzle.

ICEF4 to -1300A.

Aug 27 2002 11:24:58:180AM 1020827007 Ian Hutchinson Plasma. Density control is screwed.
No gas puff till very late

Repeat

Aug 27 2002 11:39:39:757AM 1020827008 Ian Hutchinson Fizzle

ICEF4 to -1305A
Rcur offset to 3800 from 3600.

Aug 27 2002 11:52:48:163AM 1020827009 Ian Hutchinson Plasma. H-modes. D-port erratic.

Rcur offset to 4500 from 3800 (seg 1)

Aug 27 2002 12:06:47:477PM 1020827010 Ian Hutchinson Fizzle.

Fill puff to 30ms from 32.
rcur to .683 at 1ms.
zxl to +.03 at .1s

Aug 27 2002 12:21:35:727PM 1020827011 Ian Hutchinson Plasma. Density feedback broken again.

Turn off nl04.
Preprogram PG3
move rcur poin tto .2s to allow earlier outward motion.
Move rxl in by a few mm to lower strike point.

Aug 27 2002 01:12:45:927PM 1020827012 Ian Hutchinson Fizzle.

ICEF4 to -1315 from -1305A
rcur to .687 from .683.
Power glitch.
rcur offset back to 3600
Move clearin ramp earlier around .1-.2s

Aug 27 2002 01:23:52:020PM 1020827013 Ian Hutchinson Plasma.

Lower gas puff
rcur to .69 at 1ms.

Aug 27 2002 01:32:27:277PM 1020827014 Ian Hutchinson Plasma Some signs of ITB, but a bit late.
Gas went up a bit (contrary to programming).

Lower pulse gas
rcur to .695 at 1ms.

Aug 27 2002 01:49:49:797PM 1020827015 Ian Hutchinson Plasma H-mode at 1s. nl04 goes berserk.

Raise Bz. TF current from 125700 to 140000
Attempt to establish more vanilla H-modes.
Reduce gas some more.

Aug 27 2002 02:22:17:053PM 1020827016 Ian Hutchinson Plasma 5T. H-modes are radiative and not sustained.
But H-mode is achieved immediately.

Lower Ar to 10ms. (Effectively off).
PG3 to 25 from 30 later in the shot.
rxl to 2mm. It was roughly 8mm peak.

Aug 27 2002 02:22:02:430PM 1020827017 Ian Hutchinson Plasma. Gas does not get injected even though there
was no change from the previous shot. Strong radiation.
Seems that the gas M-out is responding to the erroneous nl04
signal despite the fact that all gains are zero.

Do cold start
Did not load

Aug 27 2002 02:45:13:020PM 1020827018 Ian Hutchinson Plasma. Got about .6 target density.

Zeroed the nl04 controller.
TF to 150kA.
Raise PG3

Aug 27 2002 02:58:19:360PM 1020827019 Ian Hutchinson Plasma. Somewhat better. Still radiation.

Rxl to 0mm. Change the strike point even lower.

Aug 27 2002 03:12:37:317PM 1020827020 Ian Hutchinson Plasma. Best H-mode so far today.

RXL to -.003

Aug 27 2002 03:26:53:660PM 1020827021 Ian Hutchinson Plasma. EDA for 0.5s

TF to 125700A.
RXL to -6mm.

Aug 27 2002 03:48:05:073PM 1020827022 Ian Hutchinson Plasma. Radiation is the problem. Mo according to Rice.

ECDC for 5 minutes.
Ip to 0.7MA

Aug 27 2002 04:07:14:987PM 1020827023 Ian Hutchinson Fizzle. Remind me not to do ECDC between shots.

Aug 27 2002 04:22:40:787PM 1020827024 Ian Hutchinson Plasma. .7MA does not overcome the radiation.

TF to 150000
IP to .8MA
Allow ninja to fire early.
ICef4 to -1315A

Aug 27 2002 04:31:03:577PM 1020827025 Ian Hutchinson Plasma .5s EDA

Ar to 30 ms.
RXL top -9mm.

Aug 27 2002 04:51:01:240PM 1020827026 Ian Hutchinson Fizzle despite reaching 30kA.

rcur to .697

Aug 27 2002 05:09:27:840PM 1020827027 Ian Hutchinson Plasma. Nice shot. RF stays on. Still poor confinement.

RXL to -12mm.

Aug 27 2002 05:18:30:960PM 1020827028 Ian Hutchinson Plasma. 2.9MW from D and E. 4.9MW total briefly.

Aug 27 2002 05:38:46:560PM 1020827030 Steve Wolfe shot#30: Gas puff supposed to be like 1020627006. Ratiomatic reads ~0.3mTorr,
but MKS gauges are reading .45 and .48mTorr. This is consistent with the
observation that the ratiomatic is reading low at startup. The shot from 1020627
did in fact read 0.6mTorr; the plenum pressure may be lower?

Engineering Operator Comments

Shot Time Type Status Comment

1 09:29:39:983AM Plasma Ok

2 09:42:37:343AM Plasma Ok

3 09:55:26:623AM Plasma Ok

4 10:29:49:503AM Plasma Ok

5 10:43:57:427AM Plasma Ok

6 10:57:08:147AM Plasma Ok

7 11:10:04:830AM Plasma Ok

8 11:24:57:617AM Plasma Ok

9 11:37:48:800AM Plasma Ok

10 11:51:52:677AM Plasma Ok

11 12:05:16:210PM Plasma Ok

12 12:19:47:930PM Plasma Ok

13 01:00:18:130PM Plasma Ok

14 01:15:41:070PM Plasma Ok

15 01:29:24:353PM Plasma Ok

16 01:47:43:513PM Plasma Ok

17 02:02:48:030PM Plasma Ok

18 02:22:38:663PM Plasma Ok

19 02:38:52:213PM Plasma Ok

20 02:53:14:997PM Plasma Ok

21 03:09:50:030PM Plasma Ok

22 03:23:27:720PM Plasma Ok

23 03:46:29:197PM Plasma Ok

24 04:00:03:683PM Plasma Ok

25 04:13:56:650PM Plasma Ok

26 04:26:48:133PM Plasma Ok

27 04:40:54:150PM Plasma Ok

28 04:57:44:623PM Plasma Ok

29 05:17:46:163PM Test Ok DNB test

30 05:26:50:157PM Test Ok DNB test

31 05:39:56:987PM Test Ok

32 05:47:24:447PM Test Ok DNB test

33 05:56:15:037PM Test Ok DNB test

Session Leader Comments
Aug 27 2002 09:35:27:633AM	1020827001	John Rice	phizzle
Aug 27 2002 09:49:10:757AM	1020827002	John Rice	early H-mode with J and E, no ITB
Aug 27 2002 10:11:40:843AM	1020827003	John Rice	1 MW from E (only), late H-mode
Aug 27 2002 12:06:03:193PM	1020827004	John Rice	D and E, some H-modes and trips
Aug 27 2002 12:06:52:930PM	1020827005	John Rice	reduce argon, late H-mode
Aug 27 2002 12:07:13:760PM	1020827006	John Rice	phizzle
Aug 27 2002 12:08:17:947PM	1020827007	John Rice	lousy H-modes
Aug 27 2002 12:08:47:023PM	1020827008	John Rice	$\phi$ izzle
Aug 27 2002 12:09:42:027PM	1020827009	John Rice	multiple RF trips
Aug 27 2002 12:10:17:247PM	1020827010	John Rice	fizzle
Aug 27 2002 12:11:24:793PM	1020827011	John Rice	low density, late H-mode
Aug 27 2002 12:21:40:523PM	1020827012	John Rice	$\phi$izzle
Aug 27 2002 01:08:15:937PM	1020827013	John Rice	multiple trips
Aug 27 2002 01:23:01:500PM	1020827014	John Rice	very late H-mode, ITB trying to form at the end
Aug 27 2002 01:42:15:117PM	1020827015	John Rice	very late H-mode, multiple trips
Aug 27 2002 01:50:53:737PM	1020827016	John Rice	earlier H-mode from raising TF, multiple trips
Aug 27 2002 02:10:36:133PM	1020827017	John Rice	earlier H-mode from raising TF, lower density, argon off
Aug 27 2002 02:30:28:407PM	1020827018	John Rice	earlier H-mode from raising TF, lower density, argon off, multiple trips
Aug 27 2002 02:49:30:367PM	1020827019	John Rice	earlier H-mode from raising TF
Aug 27 2002 03:06:34:387PM	1020827020	John Rice	halfway decent H-mode
Aug 27 2002 03:13:56:690PM	1020827021	John Rice	halfway decent EDA H-mode
Aug 27 2002 03:31:27:477PM	1020827022	John Rice	lower TF, crappy H-mode, multiple trips
Aug 27 2002 03:48:05:980PM	1020827023	John Rice	fizzle
Aug 27 2002 04:03:31:610PM	1020827024	John Rice	lower current, multiple trips
Aug 27 2002 04:16:09:153PM	1020827025	John Rice	higher field, better H-mode
Aug 27 2002 04:28:27:903PM	1020827026	John Rice	phizzle
Aug 27 2002 04:51:34:243PM	1020827027	John Rice	better H-mode
Aug 27 2002 05:01:11:427PM	1020827028	John Rice	decent H-mode

Physics Operator Comments
Aug 27 2002 08:26:38:880AM		Ian Hutchinson	SL Rice PO Hutch MP301* ITB Foot, Ip Scan Revisited Setup as for 1020823003 ECE for 1 hour early, ending 7am. RF conditioning till 8:40 ECDC from 8:40 to 8:55
Aug 27 2002 09:31:17:377AM		Ian Hutchinson	Load from 1020823003 Ip offset to -35000. Load. Load segment 3 from 1020820024 segment 2.
Aug 27 2002 09:44:07:800AM	1020827001	Ian Hutchinson	Fizzle. Nothing really bad. Just a slightly too slow current ramp for the Bz ramp rate. Lower fill puff to 32ms from 35.
Aug 27 2002 09:57:00:237AM	1020827002	Ian Hutchinson	Plasma. J-port ok but a lot of radiation. D trips. Increase clearin by 2mm.
Aug 27 2002 10:26:22:830AM	1020827003	Ian Hutchinson	Plasma. D no power. E 1MW just gets into H-mode. Add further 3 mm to clearin, 1.5mm to rcur. Move EF1 crowbar to .13s. PCS crashed. Copy segment 3 EF1 Vs to segment 2. Redo the clearin and rcur changes. ICEF4 to -1310 from -1315A Load
Aug 27 2002 10:44:19:507AM	1020827004	Ian Hutchinson	Plasma. ELM free at 2MW. Argon down to 30ms from 40ms. NL04 to .9e20
Aug 27 2002 11:00:08:960AM	1020827005	Ian Hutchinson	Plasma. Radiation drops by about 30%. Lower nl04 down to .8 again Raise lower loast Rcur point by 1mm. Copy from seg 3 to seg 2 rxu and zxl.
Aug 27 2002 11:12:38:523AM	1020827006	Ian Hutchinson	Fizzle. ICEF4 to -1300A.
Aug 27 2002 11:24:58:180AM	1020827007	Ian Hutchinson	Plasma. Density control is screwed. No gas puff till very late Repeat
Aug 27 2002 11:39:39:757AM	1020827008	Ian Hutchinson	Fizzle ICEF4 to -1305A Rcur offset to 3800 from 3600.
Aug 27 2002 11:52:48:163AM	1020827009	Ian Hutchinson	Plasma. H-modes. D-port erratic. Rcur offset to 4500 from 3800 (seg 1)
Aug 27 2002 12:06:47:477PM	1020827010	Ian Hutchinson	Fizzle. Fill puff to 30ms from 32. rcur to .683 at 1ms. zxl to +.03 at .1s
Aug 27 2002 12:21:35:727PM	1020827011	Ian Hutchinson	Plasma. Density feedback broken again. Turn off nl04. Preprogram PG3 move rcur poin tto .2s to allow earlier outward motion. Move rxl in by a few mm to lower strike point.
Aug 27 2002 01:12:45:927PM	1020827012	Ian Hutchinson	Fizzle. ICEF4 to -1315 from -1305A rcur to .687 from .683. Power glitch. rcur offset back to 3600 Move clearin ramp earlier around .1-.2s
Aug 27 2002 01:23:52:020PM	1020827013	Ian Hutchinson	Plasma. Lower gas puff rcur to .69 at 1ms.
Aug 27 2002 01:32:27:277PM	1020827014	Ian Hutchinson	Plasma Some signs of ITB, but a bit late. Gas went up a bit (contrary to programming). Lower pulse gas rcur to .695 at 1ms.
Aug 27 2002 01:49:49:797PM	1020827015	Ian Hutchinson	Plasma H-mode at 1s. nl04 goes berserk. Raise Bz. TF current from 125700 to 140000 Attempt to establish more vanilla H-modes. Reduce gas some more.
Aug 27 2002 02:22:17:053PM	1020827016	Ian Hutchinson	Plasma 5T. H-modes are radiative and not sustained. But H-mode is achieved immediately. Lower Ar to 10ms. (Effectively off). PG3 to 25 from 30 later in the shot. rxl to 2mm. It was roughly 8mm peak.
Aug 27 2002 02:22:02:430PM	1020827017	Ian Hutchinson	Plasma. Gas does not get injected even though there was no change from the previous shot. Strong radiation. Seems that the gas M-out is responding to the erroneous nl04 signal despite the fact that all gains are zero. Do cold start Did not load
Aug 27 2002 02:45:13:020PM	1020827018	Ian Hutchinson	Plasma. Got about .6 target density. Zeroed the nl04 controller. TF to 150kA. Raise PG3
Aug 27 2002 02:58:19:360PM	1020827019	Ian Hutchinson	Plasma. Somewhat better. Still radiation. Rxl to 0mm. Change the strike point even lower.
Aug 27 2002 03:12:37:317PM	1020827020	Ian Hutchinson	Plasma. Best H-mode so far today. RXL to -.003
Aug 27 2002 03:26:53:660PM	1020827021	Ian Hutchinson	Plasma. EDA for 0.5s TF to 125700A. RXL to -6mm.
Aug 27 2002 03:48:05:073PM	1020827022	Ian Hutchinson	Plasma. Radiation is the problem. Mo according to Rice. ECDC for 5 minutes. Ip to 0.7MA
Aug 27 2002 04:07:14:987PM	1020827023	Ian Hutchinson	Fizzle. Remind me not to do ECDC between shots.
Aug 27 2002 04:22:40:787PM	1020827024	Ian Hutchinson	Plasma. .7MA does not overcome the radiation. TF to 150000 IP to .8MA Allow ninja to fire early. ICef4 to -1315A
Aug 27 2002 04:31:03:577PM	1020827025	Ian Hutchinson	Plasma .5s EDA Ar to 30 ms. RXL top -9mm.
Aug 27 2002 04:51:01:240PM	1020827026	Ian Hutchinson	Fizzle despite reaching 30kA. rcur to .697
Aug 27 2002 05:09:27:840PM	1020827027	Ian Hutchinson	Plasma. Nice shot. RF stays on. Still poor confinement. RXL to -12mm.
Aug 27 2002 05:18:30:960PM	1020827028	Ian Hutchinson	Plasma. 2.9MW from D and E. 4.9MW total briefly.
Aug 27 2002 05:38:46:560PM	1020827030	Steve Wolfe	shot#30: Gas puff supposed to be like 1020627006. Ratiomatic reads ~0.3mTorr, but MKS gauges are reading .45 and .48mTorr. This is consistent with the observation that the ratiomatic is reading low at startup. The shot from 1020627 did in fact read 0.6mTorr; the plenum pressure may be lower?

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:29:39:983AM	Plasma	Ok
2	09:42:37:343AM	Plasma	Ok
3	09:55:26:623AM	Plasma	Ok
4	10:29:49:503AM	Plasma	Ok
5	10:43:57:427AM	Plasma	Ok
6	10:57:08:147AM	Plasma	Ok
7	11:10:04:830AM	Plasma	Ok
8	11:24:57:617AM	Plasma	Ok
9	11:37:48:800AM	Plasma	Ok
10	11:51:52:677AM	Plasma	Ok
11	12:05:16:210PM	Plasma	Ok
12	12:19:47:930PM	Plasma	Ok
13	01:00:18:130PM	Plasma	Ok
14	01:15:41:070PM	Plasma	Ok
15	01:29:24:353PM	Plasma	Ok
16	01:47:43:513PM	Plasma	Ok
17	02:02:48:030PM	Plasma	Ok
18	02:22:38:663PM	Plasma	Ok
19	02:38:52:213PM	Plasma	Ok
20	02:53:14:997PM	Plasma	Ok
21	03:09:50:030PM	Plasma	Ok
22	03:23:27:720PM	Plasma	Ok
23	03:46:29:197PM	Plasma	Ok
24	04:00:03:683PM	Plasma	Ok
25	04:13:56:650PM	Plasma	Ok
26	04:26:48:133PM	Plasma	Ok
27	04:40:54:150PM	Plasma	Ok
28	04:57:44:623PM	Plasma	Ok
29	05:17:46:163PM	Test	Ok	DNB test
30	05:26:50:157PM	Test	Ok	DNB test
31	05:39:56:987PM	Test	Ok
32	05:47:24:447PM	Test	Ok	DNB test
33	05:56:15:037PM	Test	Ok	DNB test