Alcator C-Mod Run 1000913 Information

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Miniproposals
Miniproposal:
Date Filed:
Title:
First Author:
Session Leader:Steve Wukitch (shots 1-16)
Session Leader:John Goetz (shots 1-16)

Operators
Session leader(s):Steve Wukitch,John Goetz
Physics operator(s):Ian Hutchinson
Engineering operator(s):Bill Byford,Bill Cochran

Engineering Operator Run Comment
RF Development Hutchinson/Wukitch/Cochran/Byford.

Session Leader Plans

Physics Operators Plans

Session Leader Summaries
Entered: Jul 7 2004 03:49:24:837PM
Author: To Be Determined
Engineering Setup for 1000913

RF development.

Overnight ECDC in Deuterium.

RF work will be going on in the cell during the morning.
First shot is planned for High Noon.


Power Systems setup as on 1000831024 (note: Chopper timing.)

Gas System:

Gas setup - fill B-top with 6 psi of D2 Hybrid enabled
fill B-side lower with 1 psi of Ar Hybrid enabled
fill B-side upper with 35 psi of D2,
available for between-shot ECDC, Hybrid DISABLED
fill C-side with 30 psi of D2 Hybrid enabled
fill J-bottom with 30 psi of D2 Hybrid DISABLED
NINJA - D2 in plenum for A-B limiter puffer at 10 psi

The following gate valves should be enabled, assuming no vacuum problems:
ECE, VUV

DNB gate valve will be DISABLED for the beginning of the run; may enable later.FMIT#2 MW coefficients

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The principal objectives for the run tomorrow are:

1. Verify J-port operational capability into vacuum. (10 shots)

2. Verify J-port operational capability into plasma. (3 shots)

3. Measure loading as a function of power comparing D, E, and J-port as a two strap. (1 shot)

4. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots)

5. In diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas.
(2 shots)

6. In diverted plasmas, maximize injected power. (5 shots)

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begin with verifying operational capability of D and E into plasma

we are waiting for the SF6 to fill J3 9" transmission line

-

001 plasma, EDA, Ip~ 1 MA, BT~5.4
D: 1 MW one fault each -arc
E: 1 MW one fault each - phase balance

next shot: raise power to 1.3 MW each

002 plasma, EDA, Ip~ 1 MA, BT~5.4
D: 1.4 MW 5 faults
E: 1.3 MW 4 faults - phase balance

next shot: repeat

003 fizzle

004 D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA, big injection - low Z
170kJ; H~2->1.8
D-port; 1.4MW; 2 faults (mixture)
E-port; 1.3MW; 2 faults (mixture)

005 D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA, big injection
187kJ; H~2->1.8
D-port; 1.4MW; 3 faults
E-port; 1.3MW; 3 faults
an unrequested BT wiggle ~0.9 sec

006 D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA, big injection
180kJ; H~2->1.8
D-port; 1.4MW; 1 faults
E-port; 1.3MW; 0 faults
BT wiggle ~0.9 sec

next shot: bring up J-port at 0.6 sec

007:
D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; draw 0.5MW from 0.6 to 1.4s

Results:
plasma; diverted; 5.4T; 1MA; EDA; early disruption from Mo; continuous increase in radiated power
160kJ; H~1.8
D-port; 1.4MW; no faults
E-port; 1.3MW; no faults
J-port; 0.5MW; one fault (DC1)

008 fizzle
009 fizzle

010 D-port: draw .3MW from 0.7 to 1.4s
E-port; draw .3MW from 0.7 to 1.4s
J-port; draw .3 MW from 0.6 to 1.4 s

Results:
plasma; H-mode at 200 kW, diverted; 5.2T; 1MA
D-port; 0.3 MW; 0 faults
E-port; 0.3MW; 0 faults
BT wiggle ~0.9 sec

next shot: square up the pulses at 0.8 MW each

011:
D-port: draw 0.8MW from 0.9 to 1.15s
E-port; draw 0.8MW from 1.2 to 1.45s
J-port; draw 0.8MW from 0.6 to 0.85s

Results:
plasma; limited; 5.4T; 1MA
D-port; 0.8MW; no faults
E-port; 0.8MW; no faults
J-port; 0.8MW; on faults

the performance of J-port is not good - only a small increase in Te, neutron rate, and no change in stored energy

012 D-port: draw 1.25 MW from 0.9 to 1.15s
E-port; draw 1.25 MW from 1.2 to 1.45s
J-port; draw 1.25 MW from 0.6 to .85s

Results:
plasma inner wall limited -- density feedback not working VERY high density
D-port; 1.25 MW; all faults
E-port; 1.25MW; all faults
J-port; 1.25 MW all faults
no RF power - not tuned to this

next shot: repeat, hope for a better density feedback

013
D-port: draw 1.25MW from 0.9 to 1.125s
E-port; draw 1.25MW from 1.2 to 1.425s
J-port; draw 1.25MW from 0.6 to 0.825s

Results:
plasma; upper null diverted; MARFE until 0.74s
D-port; 1.0MW; no faults
E-port; 1.1MW; two faults
J-port; 1.2MW; max faults because of high density MARFE
and then XMTR 3, IPA anode overload
014
D-port: draw 1.25MW from 0.9 to 1.125s
E-port; draw 1.25MW from 1.2 to 1.425s
J-port; draw 1.25MW from 0.6 to 0.825s

Results:
plasma; upper null diverted; disrupts during J-port pulse
D-port; didn't run
E-port; didn't run
J-port; 1.25MW; two faults; DC1 faults; lots of impurity injections

015
D-port: draw 0.3MW ramp from 0.9 to 1.125s
E-port; draw 0.3MW ramp from 1.2 to 1.425s
J-port; draw 0.3MW ramp from 0.6 to 0.825s

Results:
plasma; upper null diverted;
D-port; ramp to 0.25MW; no faults
E-port; ramp to 0.25MW; no faults
J-port; ramp to 0.25MW; no faults

016
D-port: draw 0.5 to 1.0MW ramp from 0.9 to 1.125s
E-port; draw 0.5 to 1.0MW ramp from 1.2 to 1.425s
J-port; draw 0.5 ot 1.0MW ramp from 0.6 to 0.825s

Results:
plasma; upper null diverted;
D-port; ramp from 0.5 to 1.0MW; no faults
E-port; ramp from 0.5 to 1.0MW; no faults
J-port; ramp from 0.5 to 0.95MW; no faults

performance comparison: D-port is better than E- is better than J

The primary purpose was to compare D, E, and J antennas heating
efficiency. It was obvious from the first attempt with that the
2-strap J-port configuration was not heating as well as D and E. The
phase indicates monopole phasing which is known to be less efficient.
This is a result of an error in the resonant loop configuration. We
will begin switching to the proper loop configuration shortly. Note
shot 013-016 is upper null instead of inner wall limited which is
another means of raising the H-mode threshold.

Physics Operator Summaries
Entered: Jul 7 2004 04:37:11:990PM
Author: To Be Determined
Phsyop Summary 1000913

RF development J-port configured as 2-strap.

SL Wukitch
PO Hutch

Summary
_______

With the exception of fizzles caused by excessive fill pressure and Bz, and
a runaway gas puff shot, things went fairly well.

Got some very nice EDA plasmas heated by D & E. (1,2, 4-6)

Ran inner wall limited shot.

Upper Null plasma made operative for purposes of keeping in L-mode
(shot 12 on). Shot 16 is a good place to start with further
development. The clearin offset needs to be corrected and the trace
redrawn. However, that shot is using nl_zmeter, and so wire 14 needs
to be replaced for interferometer feedback. All upper nulls are in
segment 3.

Did the power ramps both configurations.

J-port in this 2-strap configuration performed poorly today, giving major
injections at power over about 0.8MW

Scorecard
_________

Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax
1 1.945 0.992 2 1.943 0.999
3 0.000 0.026 4 1.942 0.994
5 1.942 0.994 6 1.940 0.997
7 0.992 1.008 8 0.000 0.032
9 0.000 0.026 10 1.948 0.976
11 1.954 0.789 12 1.611 0.776
13 1.907 0.752 14 0.775 0.799
15 1.912 0.770 16 1.948 0.778

Finished summary for 1000913 Total of 16 shots.
16 shots. 13 plasmas. 3 fizzles. 0 duds.


Details
_______

Did not start till just after noon.
----------------------------------------------------------------------------
1000913xxx hutch PHYSICS_OPERATOR Sep 13 2000 12:03:19:373PM
. . . . . . . . . . . . . . . . . . . .
RF development. Late start because of RF plumbing work.

Cold Start.

PCS settings from yesterday.
Fill gas pulse. 20ms.
ICEF4 -1295. Br offset +.001T
Load from 1000831024. It has gas pulse 22ms, ICEF4-1305, Br .0005T.
Load from 1000831023. Startup is the same, but doesn't push the early
diversion so much.
Load.
----------------------------------------------------------------------------
1000913001 hutch PHYSICS_OPERATOR Sep 13 2000 12:40:38:390PM
. . . . . . . . . . . . . . . . . . . .
Plasma. 2MW RF nice and steady.
Hesitation in current rise. Fill lower than expected.
EFIT reports the plasma outboard drifting out. But predictors are not.

ICEF4 to -1295A
Br offset to .001.
RCur moved in 1mm at 1.3s.
Next shot has a change made to the EF2 resistor tap for Engineering test.
----------------------------------------------------------------------------
1000913002 hutch PHYSICS_OPERATOR Sep 13 2000 1:00:44:560PM
. . . . . . . . . . . . . . . . . . . .
Plasma. RF 2.6MW. Apparent density peaking starting just before RF terminates.
Slightly worse injections. W=170kJ.
The EF2 current is slightly lower in this shot. Perhaps that it the ballast
change, but also the current rise was faster.

ECDC between shots. 6 minutes.
----------------------------------------------------------------------------
1000913003 hutch PHYSICS_OPERATOR Sep 13 2000 1:19:07:716PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Bkdwn at 7ms. Fill pressure drifted up.

Fill puff to 20ms.
ICEF4 to -1330A.
----------------------------------------------------------------------------
1000913004 hutch PHYSICS_OPERATOR Sep 13 2000 1:37:38:530PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Big injection at .93 sec, but it survives.
D-port trips just BEFORE the injection. Suspicious!

Install field wiggle for ECE.
----------------------------------------------------------------------------
1000913005 hutch PHYSICS_OPERATOR Sep 13 2000 1:55:25:263PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Very similar injection without the RF trip.

No change.
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1000913006 hutch PHYSICS_OPERATOR Sep 13 2000 2:31:58:450PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Injection moves to the end of the shot.
W=180kJ. H/D ratio still up at about 7%. H-factor 2 assuming 90% htg.

30 minute break to fix TCI.
----------------------------------------------------------------------------
1000913007 hutch PHYSICS_OPERATOR Sep 13 2000 2:50:53:873PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupts at 1s. Caused by progressive impurity problem started
at the start of RF (D&E) J port was on at 0.5MW.

Argon puff to 24ms from 22ms.
----------------------------------------------------------------------------
1000913008 hutch PHYSICS_OPERATOR Sep 13 2000 2:58:41:233PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. High pressure. .072 mtorr; late breakdown, .63s

ICEF4 to -1305A.
----------------------------------------------------------------------------
1000913009 hutch PHYSICS_OPERATOR Sep 13 2000 3:22:43:340PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. p_0=0.77. That's too high. Br did not respond much. Bkdwn at 6.6ms.

Lower fill puff to 18ms from 20.
ICEF4 to -1310A
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1000913010 hutch PHYSICS_OPERATOR Sep 13 2000 3:43:18:623PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Small RF coupling ramps.

Load segment 2 from 1000906016 to segment 4.
Switch to segment 4.
Fill puff to 16ms.
----------------------------------------------------------------------------
1000913011 hutch PHYSICS_OPERATOR Sep 13 2000 4:04:20:046PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Good comparison of D, E and J antennas at .8MW.
J looks really bad, even though this is supposed to be 2-strap.


No changes
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1000913012 hutch PHYSICS_OPERATOR Sep 13 2000 4:27:00:123PM
. . . . . . . . . . . . . . . . . . . .
Plasma disrupts at 1.6s. Runaway puff. Interferometer died.

Remove the offset from RCUR on the upper null and draw at .661
Switch to segment 3. The upper null case.
Adjust the density to 0.8e20
----------------------------------------------------------------------------
1000913013 hutch PHYSICS_OPERATOR Sep 13 2000 4:44:00:153PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Get nl_zmeter into wire 14 from 991112014. Scale to 0.25 units (was .48).
Put EF4 demand to full reversal during the ramp-down to try to fix EF2
zero.
----------------------------------------------------------------------------
1000913014 hutch PHYSICS_OPERATOR Sep 13 2000 5:01:05:546PM
. . . . . . . . . . . . . . . . . . . .
Plasma disrupts at .76s during the J-port pulse.

Adjust the segment 3 cross-over to prevent thrash.
----------------------------------------------------------------------------
1000913015 hutch PHYSICS_OPERATOR Sep 13 2000 5:22:50:936PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Ramps down ok. EF2 just avoids zeroing.

Ip offset in segment 3 to -23000. Was zero.
Adjust rcur ramp out to start earlier.
----------------------------------------------------------------------------
1000913016 hutch PHYSICS_OPERATOR Sep 13 2000 5:28:39:840PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Some injections not attributable to RF. RF ramps 0.5-1MW on all
three antennas. J-port still injecting but some signs of heating too.

Session Leader Comments
Sep 13 2000 12:34:49:683PMJohn GoetzThe principal objectives for the run today are:

1. Verify J-port operational capability into vacuum. (10 shots)

2. Verify J-port operational capability into plasma. (3 shots)

3. Measure loading as a function of power comparing D, E, and J-port as a two strap. (1 shot)

4. Measure J, D, and E-port heating efficiency up to 1.5 MW each - L-mode required. (3 shots)

5. In diverted plasmas, verify simultaneous operational capability of D, E, and J-port antennas.
(2 shots)

6. In diverted plasmas, maximize injected power. (5 shots)

----------------------------------------------------------------------------------------

begin with verifying operational capability of D and E into plasma

we are waiting for the SF6 to fill J3 9" transmission line

Sep 13 2000 12:32:19:950PM1000913001John GoetzShot 1000913001:
D-port: draw 1MW from 0.7 to 1.4s
E-port; draw 1MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA
150kJ; H~1.7
D-port; 1MW; one fault
E-port; 1MW; one fault
Sep 13 2000 12:57:29:327PM1000913002John GoetzShot 1000913002:
D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA
165kJ; H~2->1.8
D-port; 1.4MW; five faults (mixture)
E-port; 1.3MW; four faults (mixture)
Sep 13 2000 01:08:44:937PM1000913003John GoetzShot 1000913003:
D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
fizzle
Sep 13 2000 01:43:49:000PM1000913004John GoetzShot 1000913004:
D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA interrupted by big injection
160kJ; H~1.8 after injection
D-port; 1.4MW; two faults
E-port; 1.3MW; two faults
Sep 13 2000 01:46:20:250PM1000913005John GoetzShot 1000913005:
D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; off

Results:
plasma; diverted; 5.4T; 1MA; EDA interrupted by big injection
180kJ; H>2 before injection - 160kJ; H~1.8 after injection
D-port; 1.4MW; three faults (mixture)
E-port; 1.3MW; three faults (mixture)
Sep 13 2000 02:45:45:280PM1000913007John GoetzShot 1000913007:
D-port: draw 1.3MW from 0.7 to 1.4s
E-port; draw 1.3MW from 0.7 to 1.4s
J-port; draw 0.5MW from 0.6 to 1.4s

Results:
plasma; diverted; 5.4T; 1MA; EDA; early disruption from Mo; continuous increase in radiated power
160kJ; H~1.8
D-port; 1.4MW; no faults
E-port; 1.3MW; no faults
J-port; 0.5MW; one fault (DC1)
Sep 13 2000 03:40:23:327PM1000913010John GoetzShot 1000913010:
D-port: draw 0.3MW ramp from 0.9 to 1.15s
E-port; draw 0.3MW ramp from 1.2 to 1.45s
J-port; draw 0.3MW ramp from 0.6 to 0.85s

Results:
plasma; diverted; 5.4T; 1MA; Bt waggle
had an H-mode transition so shot is no good
D-port; 0.3MW; no faults
E-port; 0.3MW; no faults
J-port; 0.3MW; on faults
Sep 13 2000 03:59:58:437PM1000913011John GoetzShot 1000913011:
D-port: draw 0.8MW from 0.9 to 1.15s
E-port; draw 0.8MW from 1.2 to 1.45s
J-port; draw 0.8MW from 0.6 to 0.85s

Results:
plasma; limited; 5.2T; 1MA
D-port; 0.8MW; no faults
E-port; 0.8MW; no faults
J-port; 0.8MW; on faults

the performance of J-port is not good - only a small increase in Te, neutron rate, and no change in stored energy
Sep 13 2000 04:07:42:827PM1000913012John GoetzShot 1000913012:
D-port: draw 1.25MW from 0.9 to 1.125s
E-port; draw 1.25MW from 1.2 to 1.425s
J-port; draw 1.25MW from 0.6 to 0.825s

Results:
plasma; runaway density
antennas didn't run
Sep 13 2000 04:37:17:123PM1000913013John GoetzShot 1000913013:
D-port: draw 1.25MW from 0.9 to 1.125s
E-port; draw 1.25MW from 1.2 to 1.425s
J-port; draw 1.25MW from 0.6 to 0.825s

Results:
plasma; upper null diverted; MARFE until 0.74s
D-port; 1.0MW; no faults
E-port; 1.1MW; two faults
J-port; 1.2MW; max faults because of high density MARFE
and then XMTR 3, screen overload
Sep 13 2000 04:57:13:607PM1000913014John GoetzShot 1000913014:
D-port: draw 1.25MW from 0.9 to 1.125s
E-port; draw 1.25MW from 1.2 to 1.425s
J-port; draw 1.25MW from 0.6 to 0.825s

Results:
plasma; upper null diverted; disrupts during J-port pulse
D-port; didn't run
E-port; didn't run
J-port; 1.25MW; two faults; DC1 faults; lots of impurity injections
Sep 13 2000 05:11:21:467PM1000913015John GoetzShot 1000913015:
D-port: draw 0.3MW ramp from 0.9 to 1.125s
E-port; draw 0.3MW ramp from 1.2 to 1.425s
J-port; draw 0.3MW ramp from 0.6 to 0.825s

Results:
plasma; upper null diverted;
D-port; ramp to 0.25MW; no faults
E-port; ramp to 0.25MW; no faults
J-port; ramp to 0.25MW; no faults
Sep 13 2000 05:55:03:483PM1000913016John GoetzShot 1000913016:
D-port: draw 0.5 to 1.0MW ramp from 0.9 to 1.125s
E-port; draw 0.5 to 1.0MW ramp from 1.2 to 1.425s
J-port; draw 0.5 ot 1.0MW ramp from 0.6 to 0.825s

Results:
plasma; upper null diverted;
D-port; ramp from 0.5 to 1.0MW; no faults
E-port; ramp from 0.5 to 1.0MW; no faults
J-port; ramp from 0.5 to 0.95MW; no faults

performance comparison: D-port is better than E- is better than J

Physics Operator Comments
Sep 13 2000 12:03:19:373PMIan HutchinsonRF development. Late start because of RF plumbing work.

Cold Start.

PCS settings from yesterday.
Fill gas pulse. 20ms.
ICEF4 -1295. Br offset +.001T
Load from 1000831024. It has gas pulse 22ms, ICEF4-1305, Br .0005T.
Load from 1000831023. Startup is the same, but doesn't push the early
diversion so much.
Load.
Sep 13 2000 12:40:38:390PM1000913001Ian HutchinsonPlasma. 2MW RF nice and steady.
Hesitation in current rise. Fill lower than expected.
EFIT reports the plasma outboard drifting out. But predictors are not.

ICEF4 to -1295A
Br offset to .001.
RCur moved in 1mm at 1.3s.
Next shot has a change made to the EF2 resistor tap for Engineering test.
Sep 13 2000 01:00:44:560PM1000913002Ian HutchinsonPlasma. RF 2.6MW. Apparent density peaking starting just before RF terminates.
Slightly worse injections. W=170kJ.
The EF2 current is slightly lower in this shot. Perhaps that it the ballast
change, but also the current rise was faster.

ECDC between shots. 6 minutes.
Sep 13 2000 01:19:07:717PM1000913003Ian HutchinsonFizzle. Bkdwn at 7ms. Fill pressure drifted up.

Fill puff to 20ms.
ICEF4 to -1330A.
Sep 13 2000 01:37:38:530PM1000913004Ian HutchinsonPlasma. Big injection at .93 sec, but it survives.
D-port trips just BEFORE the injection. Suspicious!

Install field wiggle for ECE.
Sep 13 2000 01:55:25:263PM1000913005Ian HutchinsonPlasma. Very similar injection without the RF trip.

No change.
Sep 13 2000 02:31:58:450PM1000913006Ian HutchinsonPlasma. Injection moves to the end of the shot.
W=180kJ. H/D ratio still up at about 7%. H-factor 2 assuming 90% htg.

30 minute break to fix TCI.
Sep 13 2000 02:50:53:873PM1000913007Ian HutchinsonPlasma. Disrupts at 1s. Caused by progressive impurity problem started
at the start of RF (D&E) J port was on at 0.5MW.

Argon puff to 24ms from 22ms.
Sep 13 2000 02:58:41:233PM1000913008Ian HutchinsonFizzle. High pressure. .072 mtorr; late breakdown, .63s

ICEF4 to -1305A.
Sep 13 2000 03:22:43:340PM1000913009Ian HutchinsonFizzle. p_0=0.77. That's too high. Br did not respond much. Bkdwn at 6.6ms.

Lower fill puff to 18ms from 20.
ICEF4 to -1310A
Sep 13 2000 03:43:18:623PM1000913010Ian HutchinsonPlasma. Small RF coupling ramps.

Load segment 2 from 1000906016 to segment 4.
Switch to segment 4.
Fill puff to 16ms.
Sep 13 2000 04:04:20:047PM1000913011Ian HutchinsonPlasma. Good comparison of D, E and J antennas at .8MW.
J looks really bad, even though this is supposed to be 2-strap.


No changes
Sep 13 2000 04:27:00:123PM1000913012Ian HutchinsonPlasma disrupts at 1.6s. Runaway puff. Interferometer died.

Remove the offset from RCUR on the upper null and draw at .661
Switch to segment 3. The upper null case.
Adjust the density to 0.8e20
Sep 13 2000 04:44:00:153PM1000913013Ian HutchinsonPlasma.

Get nl_zmeter into wire 14 from 991112014. Scale to 0.25 units (was .48).
Put EF4 demand to full reversal during the ramp-down to try to fix EF2
zero.
Sep 13 2000 05:01:05:547PM1000913014Ian HutchinsonPlasma disrupts at .76s during the J-port pulse.

Adjust the segment 3 cross-over to prevent thrash.
Sep 13 2000 05:22:50:937PM1000913015Ian HutchinsonPlasma. Ramps down ok. EF2 just avoids zeroing.

Ip offset in segment 3 to -23000. Was zero.
Adjust rcur ramp out to start earlier.
Sep 13 2000 05:28:39:840PM1000913016Ian HutchinsonPlasma. Some injections not attributable to RF. RF ramps 0.5-1MW on all
three antennas. J-port still injecting but some signs of heating too.

Engineering Operator Comments
ShotTimeTypeStatusComment
112:13:13:340PMPlasmaOk
212:38:48:310PMPlasmaOk
312:58:08:373PMPlasmaOk
401:18:35:810PMPlasmaOk
501:36:16:577PMPlasmaOk
601:53:44:983PMPlasmaOk
702:30:27:153PMPlasmaOk
802:49:29:140PMPlasmaOk
903:05:14:950PMPlasmaOk
1003:22:32:357PMPlasmaOk
1103:41:41:077PMPlasmaOk
1204:02:13:060PMPlasmaOk
1304:24:55:420PMPlasmaOk
1404:42:30:153PMPlasmaOk
1504:59:45:763PMPlasmaOk
1605:21:51:123PMPlasmaOk