Alcator C-Mod Run 1020731 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: Yijun Lin (shots 1-26)

Operators
Session leader(s):	Yijun Lin
Physics operator(s):	Ian Hutchinson,Steve Wolfe,Ian Hutchinson
Engineering operator(s):	Bill Parkin,Gary Dekow

Engineering Operator Run Comment
RF Conditioning; SL:Lin; PO:Hutch; EO:Dekow/Parkin

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:29:553PM

Author: To Be Determined

Run 1020731: RF conditioning
Summary:

We started with inner wall limited plasma. However, the success rate of plasma was low
due to the sparking in front of the J antenna. We changed to SN diverted plasma since
shot 10. Total 12 plasms shots were long enough to put some RF power in.

D: successfully ran clean at 1.3 MW for 400 ms. (shot 25). But tripped out at H-L transitions.
E: recovered after the repairment of the driver by-pass capacitor and driver power supply.
Successfully ran clean at 1.3 MW for 400 ms. (shot 25). But tripped out at H-L transitions.
FMIT#2 was tested to dummy load at 1.9 MW for 100 ms. All signatures showed that the tuning was
still good after the re-assembling of the driver stage.
J: Conditioned up to 1 MW. It ran for clean for about 300 ms then tripped out. We need to re-configure
the j3/4 phase feedback system and the soft retries in order to succeed bringing back
J power after its first trip.

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1020731001 ylin SESSION_LEADER Jul 31 2002 9:12:46:950AM
. . . . . . . . . . . . . . . . . . . .
Request: inner wall limited. Plasma 10^20 m^-3, 5.4 Tesla, 0.8 MA
RF demand:
D: 0.8 MW, [0.55, 1.1] sec
E: 0.0
J:ramp [.2, 0.8] MW, [1.1, 1.6] sec
Result: fizzle
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1020731001 ylin SESSION_LEADER Jul 31 2002 9:40:25:130AM
. . . . . . . . . . . . . . . . . . . .
Between shot 1 and 2, FMIT#2 has been tested to 1.9 MW with 100 ms pulse length
to dummy load.

The FPA and driver screen currents were normal. We believe the tuning of
the system was still good after we re-assembled the driver stage.
We will try to run E antenna into the plasma starting with 400 kW (0.55 Sec).
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1020731002 ylin SESSION_LEADER Jul 31 2002 10:55:52:030AM
. . . . . . . . . . . . . . . . . . . .
OH2 test. Non-plasma shot
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1020731003 ylin SESSION_LEADER Jul 31 2002 11:09:34:356AM
. . . . . . . . . . . . . . . . . . . .
Dud. No TF.
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1020731005 ylin SESSION_LEADER Jul 31 2002 11:47:45:936AM
. . . . . . . . . . . . . . . . . . . .
No power shot.
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1020731006 ylin SESSION_LEADER Jul 31 2002 12:06:14:663PM
. . . . . . . . . . . . . . . . . . . .
Disruption at 0.34 s. Same cause as shot 4
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1020731007 ylin SESSION_LEADER Jul 31 2002 12:18:00:673PM
. . . . . . . . . . . . . . . . . . . .
Request: inner wall limited. Plasma 10^20 m^-3, 5.4 Tesla, 0.8 MA
RF demand:
D: 0.8 MW, [0.55, 1.1] sec
E: 0.4 MW. [0.55, 1.1] sec
J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma up to 0.7 sec. D and E ran clean for 150 ms.

Next shot: Raise power on D to 1.0 MW. E to 0.6 MW.

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1020731008 ylin SESSION_LEADER Jul 31 2002 12:27:53:060PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupted at 0.31 sec.
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1020731009 ylin SESSION_LEADER Jul 31 2002 12:41:53:023PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupted at 0.44 sec.
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1020731010 ylin SESSION_LEADER Jul 31 2002 12:57:46:346PM
. . . . . . . . . . . . . . . . . . . .
Request: Inner wall limited plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.0 MW, [0.55, 1.1] sec
E: 0.6 MW. [0.55, 1.1] sec
J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma up to 1.07 sec. D and E ran clean for 0.52 sec.

Next shot: Raise D power to 1.2 MW, E to 0.9 MW.
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1020731011 ylin SESSION_LEADER Jul 31 2002 1:21:44:780PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.2 MW, [0.55, 1.1] sec
E: 0.9 MW. [0.55, 1.1] sec
J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes
D and E ran with several trips. J ran clean.
Next shot: Tune D, E and J, Raise E to 1.0 MW. Raise J to 1 MW.

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1020731012 ylin SESSION_LEADER Jul 31 2002 1:29:20:773PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.2 MW, [0.55, 1.1] sec
E: 1.0 MW. [0.55, 1.1] sec
J: 1.0 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes
All ran with multi-trips.
Next shot: tune all antennas. Same power.
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1020731013 ylin SESSION_LEADER Jul 31 2002 1:47:06:646PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.2 MW, [0.55, 1.1] sec
E: 1.0 MW. [0.55, 1.1] sec
J: 1.0 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma without H-mode.
D clean. E with one trip. J ran 150 ms.
J off tune because the plasma was different than shot 12.
Next shot: raise D power to 1.3 MW. E to 1.2 MW.
Same power on J. Same tuning on all.

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1020731014 ylin SESSION_LEADER Jul 31 2002 1:56:14:753PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupted at 0.33 sec.
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1020731015 ylin SESSION_LEADER Jul 31 2002 2:10:14:120PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupted at 0.34 sec.
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1020731016 ylin SESSION_LEADER Jul 31 2002 2:32:25:823PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [0.55, 1.1] sec
E: 1.2 MW. [0.55, 1.1] sec
J: 1.0 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma. D ran with one trop. E clean. J ran 150 ms.
Next shot: raise E to 1.3 MW. D to 1.4 MW.
reduce J to 0.9 MW to let it run through.
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1020731018 ylin SESSION_LEADER Jul 31 2002 2:58:29:350PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupted at 0.5 s
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1020731019 ylin SESSION_LEADER Jul 31 2002 3:18:02:753PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.4 MW, [0.55, 1.1] sec
E: 1.3 MW. [0.55, 1.1] sec
J: 0.9 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes. D and E ran with multi-trips. J ran 150 ms.
Next shot: retune all. same power on all. Ramp J power more slowly.

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1020731020 ylin SESSION_LEADER Jul 31 2002 3:34:06:576PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.4 MW, [0.55, 1.1] sec
E: 1.3 MW. [0.55, 1.1] sec
J: 0.9 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes.
D and E ran with several trips. J ran for 150 ms.

Next shot: Tune J and E. Reduce J to 0.8 MW. Reduce D to 1.3 MW.

Note: D vmax = 40 kV. E Vmax = 35 kV during H-modes.
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1020731021 ylin SESSION_LEADER Jul 31 2002 3:49:58:723PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupted at 0.36 s

Next shot: Move J (0.8 MW) earlier than D and E. Now I need to
concentrate the J business.
Also reduced D power to 1.3 MW. Found D vmax approached 40 kV
in shot 20 even though the tuning was as good as I can get for both
L and H modes. E vmax approaches 35 kV.
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1020731022 ylin SESSION_LEADER Jul 31 2002 4:07:01:953PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [1.2, 1.6] sec
E: 1.3 MW. [1.2, 1.6] sec
J: 0.8 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma. D clean. E one trip.
J ran for 300 ms.
Next shot: Tune J, E. raise J power to 0.9 MW.
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1020731023 ylin SESSION_LEADER Jul 31 2002 4:15:59:653PM
. . . . . . . . . . . . . . . . . . . .
dud
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1020731024 ylin SESSION_LEADER Jul 31 2002 4:34:11:573PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [1.2, 1.6] sec
E: 1.3 MW. [1.2, 1.6] sec
J: 0.9 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma up to 1.05 sec.
J ran for 200 ms, then faulted out.
Next shot: repeat. Tune J.
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1020731025 ylin SESSION_LEADER Jul 31 2002 4:49:54:300PM
. . . . . . . . . . . . . . . . . . . .
Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [1.2, 1.6] sec
E: 1.3 MW. [1.2, 1.6] sec
J: 0.9 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma. J ran for 300 ms. D and E ran clean.
Next shot: Tune J. Raise power on D and E both to 1.4 MW.
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1020731026 ylin SESSION_LEADER Jul 31 2002 5:04:07:886PM
. . . . . . . . . . . . . . . . . . . .
Dud.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:15:507PM

Author: To Be Determined

1020731

SL: Lin
PO: Hutch

RF conditioning.

Summary
_______

About 2.5 hours was lost at the start of the run checking out OH2U
supply after blowing fuses. Nothing obvious was found. Plasmas
starting out limited were repetitively disrupted by sparks and
injections appearing on the j-port antenna. Regardless of power being
launched by it. From shot 11 on, an older diverted shot was used.
This was able quite often to run through rampdown, but was still
experiencing troubling injections.

The gain in RCUR at startup was increased and various adjustments were
made to the startup. It was found that the relevant knob to adjust Bz
level is RCUR offset, and Bz evolution is probably RCUR drawn in
segment 1.

The first dud occured at 4:15pm. It had a clear sparker response to
gas, appearing to exonerate the sparker from blame. The ratiomatic was
also working so it is off the hook. I got the plasma back by lowering
Bz and Br slightly, but we got a dud on the final shot (26) also,
which definitely was reading lower Bz than other that had run. We
therefore have no obvious viable theory for the cause of the duds.

D and E port antennas were able to launch more than 1MW each. But they
did not stay on at L-H transitions. J-port got up to about 1MW.

Scorecard
_________

Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax
1 0.000 0.026 2 0.000 0.005
3 0.000 0.021 4 0.177 0.558
5 0.000 0.003 6 0.332 0.732
7 0.704 0.854 8 0.316 0.719
9 0.440 0.802 10 1.075 0.831
11 1.983 0.812 12 1.978 0.812
13 1.817 0.807 14 0.336 0.735
15 0.351 0.732 16 1.586 0.807
17 0.000 0.044 18 0.516 0.807
19 1.674 0.815 20 1.771 0.818
21 0.358 0.732 22 1.779 0.799
23 0.000 0.021 24 1.062 0.797
25 1.723 0.815 26 0.000 0.021

Finished summary for 1020731 Total of 26 shots.
26 shots. 19 plasmas. 2 fizzles. 2 duds. 3 ps tests.

Details
_______

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1020731xxx hutch PHYSICS_OPERATOR Jul 31 2002 8:25:26:063AM
. . . . . . . . . . . . . . . . . . . .
RF Conditioning

SL:Lin
PO:Hutch

Cold start.
Start from the existing shot, (last of Friday).
Turn on NL04 gain to 8.
Load.

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1020731001 hutch PHYSICS_OPERATOR Jul 31 2002 10:54:17:790AM
. . . . . . . . . . . . . . . . . . . .
Fizzle. OH2 upper powers supply runs amok at t=0. Fuses lost.
After many tests and hi-pots the cause was not found.
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1020731002 hutch PHYSICS_OPERATOR Jul 31 2002 11:08:24:153AM
. . . . . . . . . . . . . . . . . . . .
PLC test of OH2.
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1020731003 hutch PHYSICS_OPERATOR Jul 31 2002 11:08:58:623AM
. . . . . . . . . . . . . . . . . . . .
Attempt. No TF.
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1020731004 hutch PHYSICS_OPERATOR Jul 31 2002 11:43:06:123AM
. . . . . . . . . . . . . . . . . . . .
Plasma till 0.17s. An injection in the usual j-port position.

Ease off the segment 2 gas puff V.
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1020731005 hutch PHYSICS_OPERATOR Jul 31 2002 11:53:01:153AM
. . . . . . . . . . . . . . . . . . . .
No power shot.
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1020731006 hutch PHYSICS_OPERATOR Jul 31 2002 12:13:19:706PM
. . . . . . . . . . . . . . . . . . . .
Plasma till .3. J-port injections again.

Lower nl04 density rise rate.
Increase prefill puff to 22ms from 20ms.
The ratiomatic is a new gauge so not necessarily right.
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1020731007 hutch PHYSICS_OPERATOR Jul 31 2002 12:26:31:890PM
. . . . . . . . . . . . . . . . . . . .
Plasma till .7s. J-port injections.

Lower nl04 to .9
Raise initial rcur feedback gain to 5 from 4.
Br offset to 1.8 from 2 mT.
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1020731008 hutch PHYSICS_OPERATOR Jul 31 2002 12:40:37:836PM
. . . . . . . . . . . . . . . . . . . .
Plasma till .31s.

Ratiomatic is now supposed to be calibrated and giving .05 at t=0.
rcur gain to 6. EF4 to -1300 from -1310A.
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1020731009 hutch PHYSICS_OPERATOR Jul 31 2002 12:53:59:816PM
. . . . . . . . . . . . . . . . . . . .
Plasma till .42s. J-port injections.

rcur drawn to .67 at .015. Was .68.
br offset tback to 2mT.
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1020731010 hutch PHYSICS_OPERATOR Jul 31 2002 1:07:23:076PM
. . . . . . . . . . . . . . . . . . . .
Plasma to 1.07s.
That tweak on rcur demand made a whopping difference to rcur at start.
I don't see how that can be a real indication of position.
Also the zcur predictor is substantially changed too.

Load segment 2 from 1020725025 into segment 3 and use that.
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1020731011 hutch PHYSICS_OPERATOR Jul 31 2002 1:24:51:000PM
. . . . . . . . . . . . . . . . . . . .
Plasma to 2s. H-modes trip out D and E.

rcur to .66 at .013s.
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1020731012 hutch PHYSICS_OPERATOR Jul 31 2002 1:38:52:273PM
. . . . . . . . . . . . . . . . . . . .
Plasma to 2s. Breakdown late 9ms. 1MW from j-port.

rcur drawn point moved to 10ms from 15ms.
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1020731013 hutch PHYSICS_OPERATOR Jul 31 2002 1:54:17:703PM
. . . . . . . . . . . . . . . . . . . .
Plasma with a pellet in the ramp down.
Breakdown at 7ms. Discovered that it is really .0015s not .015s
So that explains why I was affecting the breakdown.

Reload segment 1 from shot 12. Add new point at 5ms rcur=.645
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1020731014 hutch PHYSICS_OPERATOR Jul 31 2002 2:07:52:710PM
. . . . . . . . . . . . . . . . . . . .
Plasma till .32. Breakdown at 6.6ms. Bounce.

1.5ms rcur to .68.
EF3 voltage to 2600 from 2500 at 10ms.
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1020731016 wolfe PHYSICS_OPERATOR Jul 31 2002 2:26:52:300PM
. . . . . . . . . . . . . . . . . . . .
shot #16: wolfe taking over as physop while Ian goes to a meeting.
increase pg4 puff from 21 to 25 msec to try to cure the bounce and xrays

plasma to 1.58sec. Hards are gone. No bounce.
short sample on traq 1, efit should be good to 1.3sec
no matroxrf videos
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1020731017 wolfe PHYSICS_OPERATOR Jul 31 2002 2:38:12:460PM
. . . . . . . . . . . . . . . . . . . .
shot #17: no pcs changes

fizzle. slightly late breakdown, 8msec

next shot: back down on gas, to 23msec
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1020731018 wolfe PHYSICS_OPERATOR Jul 31 2002 3:00:21:633PM
. . . . . . . . . . . . . . . . . . . .
shot #18: back down on gas, to 23msec
plasma to .5sec. PF breaker pulled. oh1 crowbar
disruption caused the crowbar.
No jant video, but I'm assuming that did it.

next shot: no pcs changes
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1020731019 wolfe PHYSICS_OPERATOR Jul 31 2002 3:16:25:250PM
. . . . . . . . . . . . . . . . . . . .
shot #19: no pcs changes
plasma to 1.66sec. 3 hmodes.
start looks ok, no hards

next shot: no pcs changes.
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1020731020 wolfe PHYSICS_OPERATOR Jul 31 2002 3:29:52:583PM
. . . . . . . . . . . . . . . . . . . .
shot #20: no pcs changes
plasma to 1.77sec, pellet at 1.65, more hmodes.
missing traq data, will re-run efit when it's recovered.
J is still spewing early in the shot.
startup looks ok, maybe current rising a little fast, but no bounce.

next shot: no pcs changes
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1020731021 hutch PHYSICS_OPERATOR Jul 31 2002 4:01:15:943PM
. . . . . . . . . . . . . . . . . . . .
Plasma to .35s.
NL04 broken. Gassed to death.

nl04 gain to 0.
icef4 to -1310 from -1300A
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1020731022 hutch PHYSICS_OPERATOR Jul 31 2002 4:14:53:746PM
. . . . . . . . . . . . . . . . . . . .
Plasma to 1.75s. Breakdown at .6s

Add rcur drawn point at 3ms at .68
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1020731023 hutch PHYSICS_OPERATOR Jul 31 2002 4:28:31:690PM
. . . . . . . . . . . . . . . . . . . .
Dud. 4.15pm. Sparker sees the gas. Ratiomatic is ok.

Br offset to 1.7 from 2.
rcir drawn at 5ms to .66 from .645.
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1020731024 hutch PHYSICS_OPERATOR Jul 31 2002 4:43:28:370PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Turned off nl04 in segment 3 (where it should have been off!)
RCUR OFFset to 3000 from 2800 in segment 1.
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1020731025 hutch PHYSICS_OPERATOR Jul 31 2002 4:59:27:063PM
. . . . . . . . . . . . . . . . . . . .
Plasma.
Some hard x-rays. But this is the shot that shows what the right
knob is to adjust the rcur offset.

rcur drawn at 5ms to .645.
Drew some gas puff in segment 3.
Turn off ninja.
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1020731026 hutch PHYSICS_OPERATOR Jul 31 2002 5:02:45:616PM
. . . . . . . . . . . . . . . . . . . .
Dud.

Session Leader Comments

Jul 31 2002 09:12:46:950AM 1020731001 Yijun Lin Request: inner wall limited. Plasma 10^20 m^-3, 5.4 Tesla, 0.8 MA
RF demand:
D: 0.8 MW, [0.55, 1.1] sec
E: 0.0
J:ramp [.2, 0.8] MW, [1.1, 1.6] sec
Result: fizzle

Jul 31 2002 09:40:25:130AM 1020731001 Yijun Lin Between shot 1 and 2, FMIT#2 has been tested to 1.9 MW with 100 ms pulse length
to dummy load.

The FPA and driver screen currents were normal. We believe the tuning of
the system was still good after we re-assembled the driver stage.
We will try to run E antenna into the plasma starting with 400 kW (0.55 Sec).

Jul 31 2002 10:55:52:030AM 1020731002 Yijun Lin OH2 test. Non-plasma shot

Jul 31 2002 11:09:34:357AM 1020731003 Yijun Lin Dud. No TF.

Jul 31 2002 11:47:45:937AM 1020731005 Yijun Lin No power shot.

Jul 31 2002 12:06:14:663PM 1020731006 Yijun Lin Disruption at 0.34 s. Same cause as shot 4

Jul 31 2002 12:18:00:673PM 1020731007 Yijun Lin Request: inner wall limited. Plasma 10^20 m^-3, 5.4 Tesla, 0.8 MA
RF demand:
D: 0.8 MW, [0.55, 1.1] sec
E: 0.4 MW. [0.55, 1.1] sec
J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma up to 0.7 sec. D and E ran clean for 150 ms.

Next shot: Raise power on D to 1.0 MW. E to 0.6 MW.

Jul 31 2002 12:27:53:060PM 1020731008 Yijun Lin Plasma. Disrupted at 0.31 sec.

Jul 31 2002 12:41:53:023PM 1020731009 Yijun Lin Plasma. Disrupted at 0.44 sec.

Jul 31 2002 12:57:46:347PM 1020731010 Yijun Lin Request: Inner wall limited plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.0 MW, [0.55, 1.1] sec
E: 0.6 MW. [0.55, 1.1] sec
J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma up to 1.07 sec. D and E ran clean for 0.52 sec.

Next shot: Raise D power to 1.2 MW, E to 0.9 MW.

Jul 31 2002 01:21:44:780PM 1020731011 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.2 MW, [0.55, 1.1] sec
E: 0.9 MW. [0.55, 1.1] sec
J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes
D and E ran with several trips. J ran clean.
Next shot: Tune D, E and J, Raise E to 1.0 MW. Raise J to 1 MW.

Jul 31 2002 01:29:20:773PM 1020731012 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.2 MW, [0.55, 1.1] sec
E: 1.0 MW. [0.55, 1.1] sec
J: 1.0 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes
All ran with multi-trips.
Next shot: tune all antennas. Same power.

Jul 31 2002 01:47:06:647PM 1020731013 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.2 MW, [0.55, 1.1] sec
E: 1.0 MW. [0.55, 1.1] sec
J: 1.0 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma without H-mode.
D clean. E with one trip. J ran 150 ms.
J off tune because the plasma was different than shot 12.
Next shot: raise D power to 1.3 MW. E to 1.2 MW.
Same power on J. Same tuning on all.

Jul 31 2002 01:56:14:753PM 1020731014 Yijun Lin Plasma. Disrupted at 0.33 sec.

Jul 31 2002 02:10:14:120PM 1020731015 Yijun Lin Plasma. Disrupted at 0.34 sec.

Jul 31 2002 02:32:25:823PM 1020731016 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [0.55, 1.1] sec
E: 1.2 MW. [0.55, 1.1] sec
J: 1.0 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma. D ran with one trop. E clean. J ran 150 ms.
Next shot: raise E to 1.3 MW. D to 1.4 MW.
reduce J to 0.9 MW to let it run through.

Jul 31 2002 02:58:29:350PM 1020731018 Yijun Lin Plasma. Disrupted at 0.5 s

Jul 31 2002 03:18:02:753PM 1020731019 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.4 MW, [0.55, 1.1] sec
E: 1.3 MW. [0.55, 1.1] sec
J: 0.9 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes. D and E ran with multi-trips. J ran 150 ms.
Next shot: retune all. same power on all. Ramp J power more slowly.

Jul 31 2002 03:34:06:577PM 1020731020 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.4 MW, [0.55, 1.1] sec
E: 1.3 MW. [0.55, 1.1] sec
J: 0.9 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma with H-modes.
D and E ran with several trips. J ran for 150 ms.

Next shot: Tune J and E. Reduce J to 0.8 MW. Reduce D to 1.3 MW.

Note: D vmax = 40 kV. E Vmax = 35 kV during H-modes.

Jul 31 2002 03:49:58:723PM 1020731021 Yijun Lin Plasma. Disrupted at 0.36 s

Next shot: Move J (0.8 MW) earlier than D and E. Now I need to
concentrate the J business.
Also reduced D power to 1.3 MW. Found D vmax approached 40 kV
in shot 20 even though the tuning was as good as I can get for both
L and H modes. E vmax approaches 35 kV.

Jul 31 2002 04:07:01:953PM 1020731022 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [1.2, 1.6] sec
E: 1.3 MW. [1.2, 1.6] sec
J: 0.8 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma. D clean. E one trip.
J ran for 300 ms.
Next shot: Tune J, E. raise J power to 0.9 MW.

Jul 31 2002 04:15:59:653PM 1020731023 Yijun Lin dud

Jul 31 2002 04:34:11:573PM 1020731024 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [1.2, 1.6] sec
E: 1.3 MW. [1.2, 1.6] sec
J: 0.9 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma up to 1.05 sec.
J ran for 200 ms, then faulted out.
Next shot: repeat. Tune J.

Jul 31 2002 04:49:54:300PM 1020731025 Yijun Lin Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA
RF demand:
D: 1.3 MW, [1.2, 1.6] sec
E: 1.3 MW. [1.2, 1.6] sec
J: 0.9 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW.
Result: Plasma. J ran for 300 ms. D and E ran clean.
Next shot: Tune J. Raise power on D and E both to 1.4 MW.

Jul 31 2002 05:04:07:887PM 1020731026 Yijun Lin Dud.

Physics Operator Comments

Jul 31 2002 08:25:26:063AM Ian Hutchinson RF Conditioning

SL:Lin
PO:Hutch

Cold start.
Start from the existing shot, (last of Friday).
Turn on NL04 gain to 8.
Load.

Jul 31 2002 10:54:17:790AM 1020731001 Ian Hutchinson Fizzle. OH2 upper powers supply runs amok at t=0. Fuses lost.
After many tests and hi-pots the cause was not found.

Jul 31 2002 11:08:24:153AM 1020731002 Ian Hutchinson PLC test of OH2.

Jul 31 2002 11:08:58:623AM 1020731003 Ian Hutchinson Attempt. No TF.

Jul 31 2002 11:43:06:123AM 1020731004 Ian Hutchinson Plasma till 0.17s. An injection in the usual j-port position.

Ease off the segment 2 gas puff V.

Jul 31 2002 11:53:01:153AM 1020731005 Ian Hutchinson No power shot.

Jul 31 2002 12:13:19:707PM 1020731006 Ian Hutchinson Plasma till .3. J-port injections again.

Lower nl04 density rise rate.
Increase prefill puff to 22ms from 20ms.
The ratiomatic is a new gauge so not necessarily right.

Jul 31 2002 12:26:31:890PM 1020731007 Ian Hutchinson Plasma till .7s. J-port injections.

Lower nl04 to .9
Raise initial rcur feedback gain to 5 from 4.
Br offset to 1.8 from 2 mT.

Jul 31 2002 12:40:37:837PM 1020731008 Ian Hutchinson Plasma till .31s.

Ratiomatic is now supposed to be calibrated and giving .05 at t=0.
rcur gain to 6. EF4 to -1300 from -1310A.

Jul 31 2002 12:53:59:817PM 1020731009 Ian Hutchinson Plasma till .42s. J-port injections.

rcur drawn to .67 at .015. Was .68.
br offset tback to 2mT.

Jul 31 2002 01:07:23:077PM 1020731010 Ian Hutchinson Plasma to 1.07s.
That tweak on rcur demand made a whopping difference to rcur at start.
I don't see how that can be a real indication of position.
Also the zcur predictor is substantially changed too.

Load segment 2 from 1020725025 into segment 3 and use that.

Jul 31 2002 01:24:51:000PM 1020731011 Ian Hutchinson Plasma to 2s. H-modes trip out D and E.

rcur to .66 at .013s.

Jul 31 2002 01:38:52:273PM 1020731012 Ian Hutchinson Plasma to 2s. Breakdown late 9ms. 1MW from j-port.

rcur drawn point moved to 10ms from 15ms.

Jul 31 2002 01:54:17:703PM 1020731013 Ian Hutchinson Plasma with a pellet in the ramp down.
Breakdown at 7ms. Discovered that it is really .0015s not .015s
So that explains why I was affecting the breakdown.

Reload segment 1 from shot 12. Add new point at 5ms rcur=.645

Jul 31 2002 02:07:52:710PM 1020731014 Ian Hutchinson Plasma till .32. Breakdown at 6.6ms. Bounce.

1.5ms rcur to .68.
EF3 voltage to 2600 from 2500 at 10ms.

Jul 31 2002 02:26:52:300PM 1020731016 Steve Wolfe shot #16: wolfe taking over as physop while Ian goes to a meeting.
increase pg4 puff from 21 to 25 msec to try to cure the bounce and xrays

plasma to 1.58sec. Hards are gone. No bounce.
short sample on traq 1, efit should be good to 1.3sec
no matroxrf videos

Jul 31 2002 02:38:12:460PM 1020731017 Steve Wolfe shot #17: no pcs changes

fizzle. slightly late breakdown, 8msec

next shot: back down on gas, to 23msec

Jul 31 2002 03:00:21:633PM 1020731018 Steve Wolfe shot #18: back down on gas, to 23msec
plasma to .5sec. PF breaker pulled. oh1 crowbar
disruption caused the crowbar.
No jant video, but I'm assuming that did it.

next shot: no pcs changes

Jul 31 2002 03:16:25:250PM 1020731019 Steve Wolfe shot #19: no pcs changes
plasma to 1.66sec. 3 hmodes.
start looks ok, no hards

next shot: no pcs changes.

Jul 31 2002 03:29:52:583PM 1020731020 Steve Wolfe shot #20: no pcs changes
plasma to 1.77sec, pellet at 1.65, more hmodes.
missing traq data, will re-run efit when it's recovered.
J is still spewing early in the shot.
startup looks ok, maybe current rising a little fast, but no bounce.

next shot: no pcs changes

Jul 31 2002 04:01:15:943PM 1020731021 Ian Hutchinson Plasma to .35s.
NL04 broken. Gassed to death.

nl04 gain to 0.
icef4 to -1310 from -1300A

Jul 31 2002 04:14:53:747PM 1020731022 Ian Hutchinson Plasma to 1.75s. Breakdown at .6s

Add rcur drawn point at 3ms at .68

Jul 31 2002 04:28:31:690PM 1020731023 Ian Hutchinson Dud. 4.15pm. Sparker sees the gas. Ratiomatic is ok.

Br offset to 1.7 from 2.
rcir drawn at 5ms to .66 from .645.

Jul 31 2002 04:43:28:370PM 1020731024 Ian Hutchinson Plasma.

Turned off nl04 in segment 3 (where it should have been off!)
RCUR OFFset to 3000 from 2800 in segment 1.

Jul 31 2002 04:59:27:063PM 1020731025 Ian Hutchinson Plasma.
Some hard x-rays. But this is the shot that shows what the right
knob is to adjust the rcur offset.

rcur drawn at 5ms to .645.
Drew some gas puff in segment 3.
Turn off ninja.

Jul 31 2002 05:02:45:617PM 1020731026 Ian Hutchinson Dud.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:08:31:067AM Plasma Bad OH2 Lower Pulled Breaker

2 10:54:23:137AM Test Ok OH2U PLC Test

3 11:07:00:293AM Plasma Bad No TF

4 11:31:14:910AM Plasma Ok

5 11:43:56:437AM Plasma Bad EF1 Type 1 Fault, Breaker pulled

6 11:58:11:650AM Plasma Ok

7 12:11:14:600PM Plasma Ok

8 12:25:02:560PM Plasma Ok

9 12:38:59:743PM Plasma Ok

10 12:52:21:100PM Plasma Ok

11 01:05:56:077PM Plasma Ok

12 01:23:25:797PM Plasma Ok

13 01:37:20:833PM Plasma Ok

14 01:53:46:280PM Plasma Ok

15 02:08:05:163PM Plasma Ok

16 02:21:04:447PM Plasma Ok

17 02:34:02:420PM Plasma Ok

18 02:47:46:600PM Plasma Bad OH2 U&L comm fault during shot

19 03:07:06:673PM Plasma Ok

20 03:20:26:693PM Plasma Ok

21 03:36:44:580PM Plasma Ok

22 03:59:54:003PM Plasma Ok

23 04:13:20:870PM Plasma Ok

24 04:26:38:750PM Plasma Ok

25 04:42:33:320PM Plasma Ok

26 04:57:45:080PM Plasma Ok

Session Leader Comments
Jul 31 2002 09:12:46:950AM	1020731001	Yijun Lin	Request: inner wall limited. Plasma 10^20 m^-3, 5.4 Tesla, 0.8 MA RF demand: D: 0.8 MW, [0.55, 1.1] sec E: 0.0 J:ramp [.2, 0.8] MW, [1.1, 1.6] sec Result: fizzle
Jul 31 2002 09:40:25:130AM	1020731001	Yijun Lin	Between shot 1 and 2, FMIT#2 has been tested to 1.9 MW with 100 ms pulse length to dummy load. The FPA and driver screen currents were normal. We believe the tuning of the system was still good after we re-assembled the driver stage. We will try to run E antenna into the plasma starting with 400 kW (0.55 Sec).
Jul 31 2002 10:55:52:030AM	1020731002	Yijun Lin	OH2 test. Non-plasma shot
Jul 31 2002 11:09:34:357AM	1020731003	Yijun Lin	Dud. No TF.
Jul 31 2002 11:47:45:937AM	1020731005	Yijun Lin	No power shot.
Jul 31 2002 12:06:14:663PM	1020731006	Yijun Lin	Disruption at 0.34 s. Same cause as shot 4
Jul 31 2002 12:18:00:673PM	1020731007	Yijun Lin	Request: inner wall limited. Plasma 10^20 m^-3, 5.4 Tesla, 0.8 MA RF demand: D: 0.8 MW, [0.55, 1.1] sec E: 0.4 MW. [0.55, 1.1] sec J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma up to 0.7 sec. D and E ran clean for 150 ms. Next shot: Raise power on D to 1.0 MW. E to 0.6 MW.
Jul 31 2002 12:27:53:060PM	1020731008	Yijun Lin	Plasma. Disrupted at 0.31 sec.
Jul 31 2002 12:41:53:023PM	1020731009	Yijun Lin	Plasma. Disrupted at 0.44 sec.
Jul 31 2002 12:57:46:347PM	1020731010	Yijun Lin	Request: Inner wall limited plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.0 MW, [0.55, 1.1] sec E: 0.6 MW. [0.55, 1.1] sec J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.07 sec. D and E ran clean for 0.52 sec. Next shot: Raise D power to 1.2 MW, E to 0.9 MW.
Jul 31 2002 01:21:44:780PM	1020731011	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [0.55, 1.1] sec E: 0.9 MW. [0.55, 1.1] sec J: 0.7 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma with H-modes D and E ran with several trips. J ran clean. Next shot: Tune D, E and J, Raise E to 1.0 MW. Raise J to 1 MW.
Jul 31 2002 01:29:20:773PM	1020731012	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [0.55, 1.1] sec E: 1.0 MW. [0.55, 1.1] sec J: 1.0 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma with H-modes All ran with multi-trips. Next shot: tune all antennas. Same power.
Jul 31 2002 01:47:06:647PM	1020731013	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.2 MW, [0.55, 1.1] sec E: 1.0 MW. [0.55, 1.1] sec J: 1.0 MW, [1.1, 1.6] sec, start with 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma without H-mode. D clean. E with one trip. J ran 150 ms. J off tune because the plasma was different than shot 12. Next shot: raise D power to 1.3 MW. E to 1.2 MW. Same power on J. Same tuning on all.
Jul 31 2002 01:56:14:753PM	1020731014	Yijun Lin	Plasma. Disrupted at 0.33 sec.
Jul 31 2002 02:10:14:120PM	1020731015	Yijun Lin	Plasma. Disrupted at 0.34 sec.
Jul 31 2002 02:32:25:823PM	1020731016	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.3 MW, [0.55, 1.1] sec E: 1.2 MW. [0.55, 1.1] sec J: 1.0 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma. D ran with one trop. E clean. J ran 150 ms. Next shot: raise E to 1.3 MW. D to 1.4 MW. reduce J to 0.9 MW to let it run through.
Jul 31 2002 02:58:29:350PM	1020731018	Yijun Lin	Plasma. Disrupted at 0.5 s
Jul 31 2002 03:18:02:753PM	1020731019	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.4 MW, [0.55, 1.1] sec E: 1.3 MW. [0.55, 1.1] sec J: 0.9 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma with H-modes. D and E ran with multi-trips. J ran 150 ms. Next shot: retune all. same power on all. Ramp J power more slowly.
Jul 31 2002 03:34:06:577PM	1020731020	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.4 MW, [0.55, 1.1] sec E: 1.3 MW. [0.55, 1.1] sec J: 0.9 MW, [1.1, 1.6] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma with H-modes. D and E ran with several trips. J ran for 150 ms. Next shot: Tune J and E. Reduce J to 0.8 MW. Reduce D to 1.3 MW. Note: D vmax = 40 kV. E Vmax = 35 kV during H-modes.
Jul 31 2002 03:49:58:723PM	1020731021	Yijun Lin	Plasma. Disrupted at 0.36 s Next shot: Move J (0.8 MW) earlier than D and E. Now I need to concentrate the J business. Also reduced D power to 1.3 MW. Found D vmax approached 40 kV in shot 20 even though the tuning was as good as I can get for both L and H modes. E vmax approaches 35 kV.
Jul 31 2002 04:07:01:953PM	1020731022	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.2, 1.6] sec E: 1.3 MW. [1.2, 1.6] sec J: 0.8 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma. D clean. E one trip. J ran for 300 ms. Next shot: Tune J, E. raise J power to 0.9 MW.
Jul 31 2002 04:15:59:653PM	1020731023	Yijun Lin	dud
Jul 31 2002 04:34:11:573PM	1020731024	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.2, 1.6] sec E: 1.3 MW. [1.2, 1.6] sec J: 0.9 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma up to 1.05 sec. J ran for 200 ms, then faulted out. Next shot: repeat. Tune J.
Jul 31 2002 04:49:54:300PM	1020731025	Yijun Lin	Request: SN diverted plasma. nl= 10^20 m^-3, Bt = 5.4 Tesla, 0.8 MA RF demand: D: 1.3 MW, [1.2, 1.6] sec E: 1.3 MW. [1.2, 1.6] sec J: 0.9 MW, [0.55, 1.2] sec, soft start: 0.1 sec ramp from 0.1 to 0.3 MW. Result: Plasma. J ran for 300 ms. D and E ran clean. Next shot: Tune J. Raise power on D and E both to 1.4 MW.
Jul 31 2002 05:04:07:887PM	1020731026	Yijun Lin	Dud.

Physics Operator Comments
Jul 31 2002 08:25:26:063AM		Ian Hutchinson	RF Conditioning SL:Lin PO:Hutch Cold start. Start from the existing shot, (last of Friday). Turn on NL04 gain to 8. Load.
Jul 31 2002 10:54:17:790AM	1020731001	Ian Hutchinson	Fizzle. OH2 upper powers supply runs amok at t=0. Fuses lost. After many tests and hi-pots the cause was not found.
Jul 31 2002 11:08:24:153AM	1020731002	Ian Hutchinson	PLC test of OH2.
Jul 31 2002 11:08:58:623AM	1020731003	Ian Hutchinson	Attempt. No TF.
Jul 31 2002 11:43:06:123AM	1020731004	Ian Hutchinson	Plasma till 0.17s. An injection in the usual j-port position. Ease off the segment 2 gas puff V.
Jul 31 2002 11:53:01:153AM	1020731005	Ian Hutchinson	No power shot.
Jul 31 2002 12:13:19:707PM	1020731006	Ian Hutchinson	Plasma till .3. J-port injections again. Lower nl04 density rise rate. Increase prefill puff to 22ms from 20ms. The ratiomatic is a new gauge so not necessarily right.
Jul 31 2002 12:26:31:890PM	1020731007	Ian Hutchinson	Plasma till .7s. J-port injections. Lower nl04 to .9 Raise initial rcur feedback gain to 5 from 4. Br offset to 1.8 from 2 mT.
Jul 31 2002 12:40:37:837PM	1020731008	Ian Hutchinson	Plasma till .31s. Ratiomatic is now supposed to be calibrated and giving .05 at t=0. rcur gain to 6. EF4 to -1300 from -1310A.
Jul 31 2002 12:53:59:817PM	1020731009	Ian Hutchinson	Plasma till .42s. J-port injections. rcur drawn to .67 at .015. Was .68. br offset tback to 2mT.
Jul 31 2002 01:07:23:077PM	1020731010	Ian Hutchinson	Plasma to 1.07s. That tweak on rcur demand made a whopping difference to rcur at start. I don't see how that can be a real indication of position. Also the zcur predictor is substantially changed too. Load segment 2 from 1020725025 into segment 3 and use that.
Jul 31 2002 01:24:51:000PM	1020731011	Ian Hutchinson	Plasma to 2s. H-modes trip out D and E. rcur to .66 at .013s.
Jul 31 2002 01:38:52:273PM	1020731012	Ian Hutchinson	Plasma to 2s. Breakdown late 9ms. 1MW from j-port. rcur drawn point moved to 10ms from 15ms.
Jul 31 2002 01:54:17:703PM	1020731013	Ian Hutchinson	Plasma with a pellet in the ramp down. Breakdown at 7ms. Discovered that it is really .0015s not .015s So that explains why I was affecting the breakdown. Reload segment 1 from shot 12. Add new point at 5ms rcur=.645
Jul 31 2002 02:07:52:710PM	1020731014	Ian Hutchinson	Plasma till .32. Breakdown at 6.6ms. Bounce. 1.5ms rcur to .68. EF3 voltage to 2600 from 2500 at 10ms.
Jul 31 2002 02:26:52:300PM	1020731016	Steve Wolfe	shot #16: wolfe taking over as physop while Ian goes to a meeting. increase pg4 puff from 21 to 25 msec to try to cure the bounce and xrays plasma to 1.58sec. Hards are gone. No bounce. short sample on traq 1, efit should be good to 1.3sec no matroxrf videos
Jul 31 2002 02:38:12:460PM	1020731017	Steve Wolfe	shot #17: no pcs changes fizzle. slightly late breakdown, 8msec next shot: back down on gas, to 23msec
Jul 31 2002 03:00:21:633PM	1020731018	Steve Wolfe	shot #18: back down on gas, to 23msec plasma to .5sec. PF breaker pulled. oh1 crowbar disruption caused the crowbar. No jant video, but I'm assuming that did it. next shot: no pcs changes
Jul 31 2002 03:16:25:250PM	1020731019	Steve Wolfe	shot #19: no pcs changes plasma to 1.66sec. 3 hmodes. start looks ok, no hards next shot: no pcs changes.
Jul 31 2002 03:29:52:583PM	1020731020	Steve Wolfe	shot #20: no pcs changes plasma to 1.77sec, pellet at 1.65, more hmodes. missing traq data, will re-run efit when it's recovered. J is still spewing early in the shot. startup looks ok, maybe current rising a little fast, but no bounce. next shot: no pcs changes
Jul 31 2002 04:01:15:943PM	1020731021	Ian Hutchinson	Plasma to .35s. NL04 broken. Gassed to death. nl04 gain to 0. icef4 to -1310 from -1300A
Jul 31 2002 04:14:53:747PM	1020731022	Ian Hutchinson	Plasma to 1.75s. Breakdown at .6s Add rcur drawn point at 3ms at .68
Jul 31 2002 04:28:31:690PM	1020731023	Ian Hutchinson	Dud. 4.15pm. Sparker sees the gas. Ratiomatic is ok. Br offset to 1.7 from 2. rcir drawn at 5ms to .66 from .645.
Jul 31 2002 04:43:28:370PM	1020731024	Ian Hutchinson	Plasma. Turned off nl04 in segment 3 (where it should have been off!) RCUR OFFset to 3000 from 2800 in segment 1.
Jul 31 2002 04:59:27:063PM	1020731025	Ian Hutchinson	Plasma. Some hard x-rays. But this is the shot that shows what the right knob is to adjust the rcur offset. rcur drawn at 5ms to .645. Drew some gas puff in segment 3. Turn off ninja.
Jul 31 2002 05:02:45:617PM	1020731026	Ian Hutchinson	Dud.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:08:31:067AM	Plasma	Bad	OH2 Lower Pulled Breaker
2	10:54:23:137AM	Test	Ok	OH2U PLC Test
3	11:07:00:293AM	Plasma	Bad	No TF
4	11:31:14:910AM	Plasma	Ok
5	11:43:56:437AM	Plasma	Bad	EF1 Type 1 Fault, Breaker pulled
6	11:58:11:650AM	Plasma	Ok
7	12:11:14:600PM	Plasma	Ok
8	12:25:02:560PM	Plasma	Ok
9	12:38:59:743PM	Plasma	Ok
10	12:52:21:100PM	Plasma	Ok
11	01:05:56:077PM	Plasma	Ok
12	01:23:25:797PM	Plasma	Ok
13	01:37:20:833PM	Plasma	Ok
14	01:53:46:280PM	Plasma	Ok
15	02:08:05:163PM	Plasma	Ok
16	02:21:04:447PM	Plasma	Ok
17	02:34:02:420PM	Plasma	Ok
18	02:47:46:600PM	Plasma	Bad	OH2 U&L comm fault during shot
19	03:07:06:673PM	Plasma	Ok
20	03:20:26:693PM	Plasma	Ok
21	03:36:44:580PM	Plasma	Ok
22	03:59:54:003PM	Plasma	Ok
23	04:13:20:870PM	Plasma	Ok
24	04:26:38:750PM	Plasma	Ok
25	04:42:33:320PM	Plasma	Ok
26	04:57:45:080PM	Plasma	Ok