Alcator C-Mod Run 951213 Information

Miniproposals

Miniproposal: 114

Date Filed: 4/14/1995

Title: Examine Up-down Neutral Density Profile during Upper X-Point Operation

First Author: John Rice

Session Leader: John Rice (shots 1-37)

Operators
Session leader(s):	John Rice
Physics operator(s):	Robert Granetz
Engineering operator(s):	Vinny Bertolino

Engineering Operator Run Comment
upper den

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:14:803PM

Author: To Be Determined

Run Summary for 951213

Was this the curse of Son of MP049A or the son of Curse of MP049A?
Either way, the run got off to a late start due to Cryo PC problems, then
entered the disruption-fiz-fiz-fiz-hard x-ray cycle, presumably because of
the filthy surfaces of the upper divertor area being touched for the very
first time, at least this run period. Number of useful shots: ~ 0, although
Steve Wolfe's dog will probably charge me for the run.

Physics Operator Summaries

Entered: Jul 7 2004 04:36:55:600PM

Author: To Be Determined

Physics Operator's summary for run 951213

MP 114 -- Up/down neutral asymmetry -- J. Rice
(mostly upper x-point diverted plasmas)

SL: J. Rice
PO: R. Granetz
EO: V. Bertolino

Today's run plan: Import segment 3 of shot 950526023, which was an upper
x-point diverted plasma from the last time we did it. Puff
in argon from B-side-lower piezo valve. John needs the
density to be rather low, so that CX excitation of Ar16+ is
significant, so set nl_04=0.6e20 m-2. We need a series of 15
good constant plasmas so that an up/down scan of the Ar16+
lines (n=9 & 10) can be done.

Summary: Absolutely the worst run I have ever had. All upper x-point shots
disrupted upwards, each followed by many fizzles. Recovering reliable
current rises proved to be extremely difficult. I finally had to give
up and try to get back the fiducial shot. The only decent upper
x-point shots (018, 023, and 025) were both at nl_04=1.0e20 m-2,
which was too high to be useful for this MP.

Misc Phys Op stuff: There was a delay of several hours getting going, due to a
problem with cryo cooling.

Scorecard: 17 plasmas
20 fizzles
0 duds
----------
37 total

Run setup:
Normal ECDC in deuterium
Deuterium in K-side at 20 psi (used to be A-side)
Deuterium in B-top at 5 psi (puff pre-fill)
Argon in B-side-lower at 4-5 psi
No RF, no pellets

PCS copied from shot 950526023, segments 3 & 4 (with appropriate
updates), and fiducial shot 951207025 for segments 1 & 2. Density
set to nl_04=0.6e20 m-2. Segments 1 and 3 will be used today, except
for the first shot, which will be a fiducial (segments 1 and 2).

Detailed shot log:

Shot 01 -- Fiducial shot. Good shot. Had ohmic H-mode.

Next shot: Upper x-point diverted plasma. Argon set for 50 ms
puff starting at t=0.3 s (@ 90 volts).

Shot 02 -- Plasma, disrupted at 0.37 s. Went upward, Ihalo=130 kA.

Next shot: turn off argon valve and try to recover. Fizzle expected

Shot 03 -- Plasma, disrupted at 0.60 s. Was upper x-pt diverted. Maybe we're
just cleaning things up on the top.

Next shot: re-enable argon puffing and repeat.

Shot 04 -- Plasma, disrupted at 0.61 s. Some hard x-rays. All of the
disruptions have been thermal quench ones, so far.

Next shot: increase pre-pulse puff duration by 1 ms and repeat

Shot 05 -- Plasma, disrupted at 0.38 s. EFC railed a couple of ms prior to
disruption, when elongation reached 1.65. Maybe the plasma is
too elongated. There were also even more hard x-rays.

Next shot: raise ZCUR by 5 mm in order to decrease plasma elongation
Argon remains on. Raise early gas puffing.

Shot 06 -- Plasma, disrupted at 0.41 s. Hard x-rays. Don't understand
the disruption problem.

Next shot: change density programming to that of the fiducial
(1.0e20 m-2), and lengthen pre-pulse puff duration by 1 ms

Shot 07 -- Fizzle.

Next shot: shorten pre-pulse puff by 1 ms, and decrease feedback
gain on ZXL. Note: on changing the ZXL gain, PCS re-compiled the
call_alg routine.

Shot 08 -- Fizzle. The null has a large Br.

Next shot: reduce Br by 1 mT.

Shot 09 -- Plasma, disrupted at 0.56 s. Several minor disruptions from
0.2 to 0.3 s. Hard x-rays are gone. Density nearly
reaches 1e20 m-2.

Next shot: no changes

Shot 10 -- Fizzle. Null is okay.

Next shot: repeat

Shot 11 -- Plasma, disrupted at 0.57 s. Minor disruption at 0.28 s.

Next shot: copy Ip from segment 1 into segment 3, modify ZCUR in
segment 3 to better match segment 1 at 0.1 s, and reduce CLEARIN
in segment 3 to reduce elongation.

Shot 12 -- Fizzle.

Next shot: repeat

Shot 13 -- Plasma, disrupted at 0.59 s. Plasma elongation is only 1.55, and
EFC is not having much of a problem before the disruption.

Next shot: shorten the argon puff by 10 ms and repeat.

Shot 14 -- Fizzle. Null okay

Next shot: Delay gain increase in ZXU by 0.1 s and repeat

Shot 15 -- Fizzle.

Next shot: repeat

Shot 16 -- Fizzle.

Next shot: Try the fiducial shot, but leave argon on.

Shot 17 -- Fizzle (on a fiducial shot).

Next shot: change back to upper x-point. Lower Br by 0.5 mT and
lengthen pre-pulse puff by 1 ms.

Shot 18 -- Plasma, disrupted at 1.00 s. Growing vertical instability starting
at 0.95 s. Some hard x-rays.

Next shot: reduce feedback gain on ZXU, and tweak ZXU programming
after 1 s.

Shot 19 -- Fizzle.

Next shot: increase pre-pulse puff duration by 1 ms.

Shot 20 -- Fizzle.

Next shot: repeat.

Shot 21 -- Fizzle.

Next shot: Lower Br by 0.5 mT and repeat.

Shot 22 -- Fizzle.

Next shot: shorten pre-pulse puff by 2 ms and repeat.

Shot 23 -- Plasma, disrupted at 1.04 s.

Next shot: tweak pre-pulse puff again, but we'll probably have to
have 3 or 4 more fizzles again.

Shot 24 -- Fizzle.

Next shot: repeat

Shot 25 -- Plasma, made it halfway down rampdown before disrupting. There
were also hard x-rays.

Next shot: increase pre-pulse puff by 1 ms. Decrease density
to nl_04=0.6e20 m-2.

Shot 26 -- Fizzle.

Next shot: repeat

Shot 27 -- Plasma, disrupted at 0.39 s. Density was programmed to be 0.6e20
on this shot.

Next shot: raise density to ne_04=0.8e20 m-2

Shot 28 -- Plasma, runaway screamer, disrupted at 0.26 and 0.29 s.

Next shot: raise pre-pulse puff duration by 1 ms, add a lot more
early gas on pulse-gas-3.

Shot 29 -- Fizzle. Null is okay.

Next shot: repeat

Shot 30 -- Fizzle.

Next shot: reduce early gas, tweak RCUR derivative gain and offset

Shot 31 -- Plasma, disrupted at 0.41 s. No hard x-rays this time.

Next shot: repeat

Shot 32 -- Fizzle.

Next shot: tweak up the early OH1 voltage from 130 to 190 volts

Shot 33 -- Fizzle. Current rise was too fast.

Next shot: tweak down the early OH1 voltage a from 190 to 150 volts

Shot 34 -- Fizzle.

Next shot: reload fiducial shot (seg 1 & 2 from 951207025)

Shot 35 -- Fizzle (attempt at fiducial shot)

Next shot: reduce Br by 0.6 mT

Shot 36 -- Plasma. Good fiducial shot (with the Br tweak).

Next shot: repeat

Shot 37 -- Plasma, disrupted at 0.39 s due to OH2L power supply fault.

End of run

Session Leader Comments

Physics Operator Comments

Dec 13 1995 08:50:50:680AM Robert Granetz MP 114 -- Up/down neutral asymmetry -- J. Rice
(mostly upper x-point diverted plasmas)

SL: J. Rice
PO: R. Granetz
EO: V. Bertolino

Today's run plan: Start from 950526023, which was an upper x-point diverted
plasma from the last time we did it. Puff in argon from B-side-lower
piezo valve. John needs the density to be rather low, so that CX
excitation of Ar16+ is significant, so set nl_04=0.6e20 m-2. We
need a series of 15 good constant plasmas so that an up/down scan
of the Ar16+ lines (n=9 & 10) can be done.

Dec 13 1995 08:51:27:980AM Robert Granetz Run setup:
Normal ECDC in deuterium
Deuterium in K-side at 20 psi (used to be A-side)
Deuterium in B-top at 5 psi (puff pre-fill)
Argon in B-side-lower at 4-5 psi
No RF, no pellets

PCS copied from shot 950526023, segments 3 & 4 (with appropriate
updates), and fiducial shot 951207025 for segments 1 & 2. Density
set to nl_04=0.6e20 m-2. Segments 1 and 3 will be used today.

Dec 13 1995 10:48:53:830AM 951213001 Robert Granetz Shot 01 -- Fiducial shot. Good shot. Had ohmic H-mode.

Next shot: Upper x-point diverted plasma. Argon set for 50 ms
puff starting at t=0.3 s (@ 90 volts).

Dec 13 1995 11:01:46:480AM 951213002 Robert Granetz Shot 02 -- Plasma, disrupted at 0.37 s. Went upward, Ihalo=130 kA.

Next shot: turn off argon valve and try to recover. Fizzle expected

Dec 13 1995 11:08:59:250AM 951213003 Robert Granetz Shot 03 -- Plasma, disrupted at 0.60 s. Was upper x-pt diverted. Maybe we're
just cleaning things up on the top.

Next shot: re-enable argon puffing and repeat.

Dec 13 1995 11:22:02:150AM 951213004 Robert Granetz Shot 04 -- Plasma, disrupted at 0.61 s. Some hard x-rays. All of the
disruptions have been thermal quench ones, so far.

Next shot: increase pre-pulse puff duration by 1 ms and repeat

Dec 13 1995 11:41:02:650AM 951213005 Robert Granetz Shot 05 -- Plasma, disrupted at 0.38 s. EFC railed a couple of ms prior to
disruption, when elongation reached 1.65. Maybe the plasma is
too elongated. There were also even more hard x-rays.

Next shot: raise ZCUR by 5 mm in order to decrease plasma elongation
Argon remains on. Raise early gas puffing.

Dec 13 1995 11:51:29:160AM 951213006 Robert Granetz Shot 06 -- Plasma, disrupted at 0.41 s. Hard x-rays. Don't understand
the disruption problem.

Next shot: change density programming to that of the fiducial
(1.0e20 m-2), and lengthen pre-pulse puff duration by 1 ms

Dec 13 1995 12:07:11:850PM 951213007 Robert Granetz Shot 07 -- Fizzle.

Next shot: shorten pre-pulse puff by 1 ms, and decrease feedback
gain on ZXL. Note: on changing the ZXL gain, PCS re-compiled the
call_alg routine.

Dec 13 1995 12:12:23:450PM 951213008 Robert Granetz Shot 08 -- Fizzle. The null has a large Br.

Next shot: reduce Br by 1 mT.

Dec 13 1995 12:41:05:710PM 951213009 Robert Granetz Shot 09 -- Plasma, disrupted at 0.56 s. Several minor disruptions from
0.2 to 0.3 s. Hard x-rays are gone. Density nearly
reaches 1e20 m-2.

Next shot: no changes

Dec 13 1995 12:53:13:720PM 951213010 Robert Granetz Shot 10 -- Fizzle. Null is okay.

Next shot: repeat

Dec 13 1995 01:01:59:150PM 951213011 Robert Granetz Shot 11 -- Plasma, disrupted at 0.57 s. Minor disruption at 0.28 s.

Next shot: copy Ip from segment 1 into segment 3, modify ZCUR in
segment 3 to better match segment 1 at 0.1 s, and reduce CLEARIN
in segment 3 to reduce elongation.

Dec 13 1995 01:04:47:470PM 951213012 Robert Granetz Shot 12 -- Fizzle.

Next shot: repeat

Dec 13 1995 01:21:39:240PM 951213013 Robert Granetz Shot 13 -- Plasma, disrupted at 0.59 s. Plasma elongation is only 1.55, and
EFC is not having much of a problem before the disruption.

Next shot: shorten the argon puff by 10 ms and repeat.

Dec 13 1995 01:30:41:780PM 951213014 Robert Granetz Shot 14 -- Fizzle. Null okay

Next shot: Delay gain increase in ZXU by 0.1 s and repeat

Dec 13 1995 01:37:58:380PM 951213015 Robert Granetz Shot 15 -- Fizzle.

Next shot: repeat

Dec 13 1995 01:43:41:700PM 951213016 Robert Granetz Shot 16 -- Fizzle.

Next shot: Try the fiducial shot, but leave argon on.

Dec 13 1995 01:55:22:600PM 951213017 Robert Granetz Shot 17 -- Fizzle (on a fiducial shot).

Next shot: change back to upper x-point. Lower Br by 0.5 mT and
lengthen pre-pulse puff by 1 ms.

Dec 13 1995 02:08:42:030PM 951213018 Robert Granetz Shot 18 -- Plasma, disrupted at 1.00 s. Growing vertical instability starting
at 0.95 s. Some hard x-rays.

Next shot: reduce feedback gain on ZXU, and tweak ZXU programming
after 1 s.

Dec 13 1995 02:10:46:680PM 951213019 Robert Granetz Shot 19 -- Fizzle.

Next shot: increase pre-pulse puff duration by 1 ms.

Dec 13 1995 02:21:56:020PM 951213020 Robert Granetz Shot 20 -- Fizzle.

Next shot: repeat.

Dec 13 1995 02:30:41:250PM 951213021 Robert Granetz Shot 21 -- Fizzle.

Next shot: repeat.

Dec 13 1995 02:39:40:220PM 951213022 Robert Granetz Shot 22 -- Fizzle.

Next shot: shorten pre-pulse puff by 2 ms and repeat.

Dec 13 1995 02:48:38:970PM 951213023 Robert Granetz Shot 23 -- Plasma, disrupted at 1.04 s.

Next shot: tweak pre-pulse puff again, but we'll probably have to
have 3 or 4 more fizzles again.

Dec 13 1995 02:55:02:450PM 951213024 Robert Granetz Shot 24 -- Fizzle.

Next shot: repeat

Dec 13 1995 03:06:09:530PM 951213025 Robert Granetz Shot 25 -- Plasma, made it halfway down rampdown before disrupting. There
were also hard x-rays.

Next shot: increase pre-pulse puff by 1 ms. Decrease density
to nl_04=0.6e20 m-2.

Dec 13 1995 03:18:20:660PM 951213026 Robert Granetz Shot 26 -- Fizzle.

Next shot: repeat

Dec 13 1995 03:27:00:310PM 951213027 Robert Granetz Shot 27 -- Plasma, disrupted at 0.39 s. Density was programmed to be 0.6e20
on this shot.

Next shot: raise density to ne_04=0.8e20 m-2

Dec 13 1995 03:39:28:490PM 951213028 Robert Granetz Shot 28 -- Plasma, runaway screamer, disrupted at 0.26 and 0.29 s.

Next shot: raise pre-pulse puff duration by 1 ms, add a lot more
early gas on pulse-gas-3.

Dec 13 1995 03:46:01:210PM 951213029 Robert Granetz Shot 29 -- Fizzle. Null is okay.

Next shot: repeat

Dec 13 1995 03:54:25:660PM 951213030 Robert Granetz Shot 30 -- Fizzle.

Next shot: reduce early gas

Dec 13 1995 04:05:10:860PM 951213031 Robert Granetz Shot 31 -- Plasma, disrupted at 0.41 s. No hard x-rays this time.

Next shot: repeat

Dec 13 1995 04:09:35:910PM 951213032 Robert Granetz Shot 32 -- Fizzle.

Next shot: tweak up the early OH1 voltage from 130 to 190 volts

Dec 13 1995 04:18:08:600PM 951213033 Robert Granetz Shot 33 -- Fizzle. Current rise was too fast.

Next shot: tweak down the early OH1 voltage a from 190 to 150 volts

Dec 13 1995 04:23:56:950PM 951213034 Robert Granetz Shot 34 -- Fizzle.

Next shot: reload fiducial shot (seg 1 & 2 from 951207025)

Dec 13 1995 04:34:09:100PM 951213035 Robert Granetz Shot 35 -- Fizzle (attempt at fiducial shot)

Next shot: reduce Br by 0.6 mT

Dec 13 1995 04:39:51:390PM 951213036 Robert Granetz Shot 36 -- Plasma. Good fiducial shot (with the Br tweak).

Next shot: repeat

Dec 13 1995 04:48:32:110PM 951213037 Robert Granetz Shot 37 -- Plasma, disrupted at 0.39 s due to OH2L power supply fault.

Next shot: repeat

Engineering Operator Comments

Shot Time Type Status Comment

1 10:42:01:950AM Plasma Ok

2 10:53:31:370AM Plasma Ok

3 11:01:34:280AM Plasma Ok

4 11:13:20:660AM Plasma Ok

5 11:26:29:700AM Plasma Ok

6 11:39:45:000AM Plasma Ok

7 11:50:03:560AM Plasma Ok

8 12:06:36:760PM Plasma Ok

9 12:30:14:030PM Plasma Ok

10 12:41:29:110PM Plasma Ok

11 12:49:21:300PM Plasma Ok

12 01:01:14:060PM Plasma Ok

13 01:11:47:320PM Plasma Ok

14 01:22:21:480PM Plasma Ok

15 01:31:20:620PM Plasma Ok

16 01:39:12:100PM Plasma Ok

17 01:46:26:030PM Plasma Ok

18 01:54:42:580PM Plasma Ok

19 02:07:10:350PM Plasma Ok

20 02:14:56:260PM Plasma Ok

21 02:25:11:700PM Plasma Ok

22 02:33:49:940PM Plasma Ok

23 02:41:52:240PM Plasma Ok

24 02:51:19:590PM Plasma Ok

25 02:59:04:190PM Plasma Ok

26 03:09:29:380PM Plasma Ok

27 03:18:50:090PM Plasma Ok

28 03:29:49:830PM Plasma Ok

29 03:40:32:100PM Plasma Ok

30 03:47:36:840PM Plasma Ok

31 03:57:30:580PM Plasma Ok

32 04:05:40:060PM Plasma Ok

33 04:12:52:020PM Plasma Ok

34 04:21:05:960PM Plasma Ok

35 04:28:42:450PM Plasma Ok

36 04:36:14:180PM Plasma Ok

37 04:44:05:560PM Plasma Ok

Physics Operator Comments
Dec 13 1995 08:50:50:680AM		Robert Granetz	MP 114 -- Up/down neutral asymmetry -- J. Rice (mostly upper x-point diverted plasmas) SL: J. Rice PO: R. Granetz EO: V. Bertolino Today's run plan: Start from 950526023, which was an upper x-point diverted plasma from the last time we did it. Puff in argon from B-side-lower piezo valve. John needs the density to be rather low, so that CX excitation of Ar16+ is significant, so set nl_04=0.6e20 m-2. We need a series of 15 good constant plasmas so that an up/down scan of the Ar16+ lines (n=9 & 10) can be done.
Dec 13 1995 08:51:27:980AM		Robert Granetz	Run setup: Normal ECDC in deuterium Deuterium in K-side at 20 psi (used to be A-side) Deuterium in B-top at 5 psi (puff pre-fill) Argon in B-side-lower at 4-5 psi No RF, no pellets PCS copied from shot 950526023, segments 3 & 4 (with appropriate updates), and fiducial shot 951207025 for segments 1 & 2. Density set to nl_04=0.6e20 m-2. Segments 1 and 3 will be used today.
Dec 13 1995 10:48:53:830AM	951213001	Robert Granetz	Shot 01 -- Fiducial shot. Good shot. Had ohmic H-mode. Next shot: Upper x-point diverted plasma. Argon set for 50 ms puff starting at t=0.3 s (@ 90 volts).
Dec 13 1995 11:01:46:480AM	951213002	Robert Granetz	Shot 02 -- Plasma, disrupted at 0.37 s. Went upward, Ihalo=130 kA. Next shot: turn off argon valve and try to recover. Fizzle expected
Dec 13 1995 11:08:59:250AM	951213003	Robert Granetz	Shot 03 -- Plasma, disrupted at 0.60 s. Was upper x-pt diverted. Maybe we're just cleaning things up on the top. Next shot: re-enable argon puffing and repeat.
Dec 13 1995 11:22:02:150AM	951213004	Robert Granetz	Shot 04 -- Plasma, disrupted at 0.61 s. Some hard x-rays. All of the disruptions have been thermal quench ones, so far. Next shot: increase pre-pulse puff duration by 1 ms and repeat
Dec 13 1995 11:41:02:650AM	951213005	Robert Granetz	Shot 05 -- Plasma, disrupted at 0.38 s. EFC railed a couple of ms prior to disruption, when elongation reached 1.65. Maybe the plasma is too elongated. There were also even more hard x-rays. Next shot: raise ZCUR by 5 mm in order to decrease plasma elongation Argon remains on. Raise early gas puffing.
Dec 13 1995 11:51:29:160AM	951213006	Robert Granetz	Shot 06 -- Plasma, disrupted at 0.41 s. Hard x-rays. Don't understand the disruption problem. Next shot: change density programming to that of the fiducial (1.0e20 m-2), and lengthen pre-pulse puff duration by 1 ms
Dec 13 1995 12:07:11:850PM	951213007	Robert Granetz	Shot 07 -- Fizzle. Next shot: shorten pre-pulse puff by 1 ms, and decrease feedback gain on ZXL. Note: on changing the ZXL gain, PCS re-compiled the call_alg routine.
Dec 13 1995 12:12:23:450PM	951213008	Robert Granetz	Shot 08 -- Fizzle. The null has a large Br. Next shot: reduce Br by 1 mT.
Dec 13 1995 12:41:05:710PM	951213009	Robert Granetz	Shot 09 -- Plasma, disrupted at 0.56 s. Several minor disruptions from 0.2 to 0.3 s. Hard x-rays are gone. Density nearly reaches 1e20 m-2. Next shot: no changes
Dec 13 1995 12:53:13:720PM	951213010	Robert Granetz	Shot 10 -- Fizzle. Null is okay. Next shot: repeat
Dec 13 1995 01:01:59:150PM	951213011	Robert Granetz	Shot 11 -- Plasma, disrupted at 0.57 s. Minor disruption at 0.28 s. Next shot: copy Ip from segment 1 into segment 3, modify ZCUR in segment 3 to better match segment 1 at 0.1 s, and reduce CLEARIN in segment 3 to reduce elongation.
Dec 13 1995 01:04:47:470PM	951213012	Robert Granetz	Shot 12 -- Fizzle. Next shot: repeat
Dec 13 1995 01:21:39:240PM	951213013	Robert Granetz	Shot 13 -- Plasma, disrupted at 0.59 s. Plasma elongation is only 1.55, and EFC is not having much of a problem before the disruption. Next shot: shorten the argon puff by 10 ms and repeat.
Dec 13 1995 01:30:41:780PM	951213014	Robert Granetz	Shot 14 -- Fizzle. Null okay Next shot: Delay gain increase in ZXU by 0.1 s and repeat
Dec 13 1995 01:37:58:380PM	951213015	Robert Granetz	Shot 15 -- Fizzle. Next shot: repeat
Dec 13 1995 01:43:41:700PM	951213016	Robert Granetz	Shot 16 -- Fizzle. Next shot: Try the fiducial shot, but leave argon on.
Dec 13 1995 01:55:22:600PM	951213017	Robert Granetz	Shot 17 -- Fizzle (on a fiducial shot). Next shot: change back to upper x-point. Lower Br by 0.5 mT and lengthen pre-pulse puff by 1 ms.
Dec 13 1995 02:08:42:030PM	951213018	Robert Granetz	Shot 18 -- Plasma, disrupted at 1.00 s. Growing vertical instability starting at 0.95 s. Some hard x-rays. Next shot: reduce feedback gain on ZXU, and tweak ZXU programming after 1 s.
Dec 13 1995 02:10:46:680PM	951213019	Robert Granetz	Shot 19 -- Fizzle. Next shot: increase pre-pulse puff duration by 1 ms.
Dec 13 1995 02:21:56:020PM	951213020	Robert Granetz	Shot 20 -- Fizzle. Next shot: repeat.
Dec 13 1995 02:30:41:250PM	951213021	Robert Granetz	Shot 21 -- Fizzle. Next shot: repeat.
Dec 13 1995 02:39:40:220PM	951213022	Robert Granetz	Shot 22 -- Fizzle. Next shot: shorten pre-pulse puff by 2 ms and repeat.
Dec 13 1995 02:48:38:970PM	951213023	Robert Granetz	Shot 23 -- Plasma, disrupted at 1.04 s. Next shot: tweak pre-pulse puff again, but we'll probably have to have 3 or 4 more fizzles again.
Dec 13 1995 02:55:02:450PM	951213024	Robert Granetz	Shot 24 -- Fizzle. Next shot: repeat
Dec 13 1995 03:06:09:530PM	951213025	Robert Granetz	Shot 25 -- Plasma, made it halfway down rampdown before disrupting. There were also hard x-rays. Next shot: increase pre-pulse puff by 1 ms. Decrease density to nl_04=0.6e20 m-2.
Dec 13 1995 03:18:20:660PM	951213026	Robert Granetz	Shot 26 -- Fizzle. Next shot: repeat
Dec 13 1995 03:27:00:310PM	951213027	Robert Granetz	Shot 27 -- Plasma, disrupted at 0.39 s. Density was programmed to be 0.6e20 on this shot. Next shot: raise density to ne_04=0.8e20 m-2
Dec 13 1995 03:39:28:490PM	951213028	Robert Granetz	Shot 28 -- Plasma, runaway screamer, disrupted at 0.26 and 0.29 s. Next shot: raise pre-pulse puff duration by 1 ms, add a lot more early gas on pulse-gas-3.
Dec 13 1995 03:46:01:210PM	951213029	Robert Granetz	Shot 29 -- Fizzle. Null is okay. Next shot: repeat
Dec 13 1995 03:54:25:660PM	951213030	Robert Granetz	Shot 30 -- Fizzle. Next shot: reduce early gas
Dec 13 1995 04:05:10:860PM	951213031	Robert Granetz	Shot 31 -- Plasma, disrupted at 0.41 s. No hard x-rays this time. Next shot: repeat
Dec 13 1995 04:09:35:910PM	951213032	Robert Granetz	Shot 32 -- Fizzle. Next shot: tweak up the early OH1 voltage from 130 to 190 volts
Dec 13 1995 04:18:08:600PM	951213033	Robert Granetz	Shot 33 -- Fizzle. Current rise was too fast. Next shot: tweak down the early OH1 voltage a from 190 to 150 volts
Dec 13 1995 04:23:56:950PM	951213034	Robert Granetz	Shot 34 -- Fizzle. Next shot: reload fiducial shot (seg 1 & 2 from 951207025)
Dec 13 1995 04:34:09:100PM	951213035	Robert Granetz	Shot 35 -- Fizzle (attempt at fiducial shot) Next shot: reduce Br by 0.6 mT
Dec 13 1995 04:39:51:390PM	951213036	Robert Granetz	Shot 36 -- Plasma. Good fiducial shot (with the Br tweak). Next shot: repeat
Dec 13 1995 04:48:32:110PM	951213037	Robert Granetz	Shot 37 -- Plasma, disrupted at 0.39 s due to OH2L power supply fault. Next shot: repeat

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	10:42:01:950AM	Plasma	Ok
2	10:53:31:370AM	Plasma	Ok
3	11:01:34:280AM	Plasma	Ok
4	11:13:20:660AM	Plasma	Ok
5	11:26:29:700AM	Plasma	Ok
6	11:39:45:000AM	Plasma	Ok
7	11:50:03:560AM	Plasma	Ok
8	12:06:36:760PM	Plasma	Ok
9	12:30:14:030PM	Plasma	Ok
10	12:41:29:110PM	Plasma	Ok
11	12:49:21:300PM	Plasma	Ok
12	01:01:14:060PM	Plasma	Ok
13	01:11:47:320PM	Plasma	Ok
14	01:22:21:480PM	Plasma	Ok
15	01:31:20:620PM	Plasma	Ok
16	01:39:12:100PM	Plasma	Ok
17	01:46:26:030PM	Plasma	Ok
18	01:54:42:580PM	Plasma	Ok
19	02:07:10:350PM	Plasma	Ok
20	02:14:56:260PM	Plasma	Ok
21	02:25:11:700PM	Plasma	Ok
22	02:33:49:940PM	Plasma	Ok
23	02:41:52:240PM	Plasma	Ok
24	02:51:19:590PM	Plasma	Ok
25	02:59:04:190PM	Plasma	Ok
26	03:09:29:380PM	Plasma	Ok
27	03:18:50:090PM	Plasma	Ok
28	03:29:49:830PM	Plasma	Ok
29	03:40:32:100PM	Plasma	Ok
30	03:47:36:840PM	Plasma	Ok
31	03:57:30:580PM	Plasma	Ok
32	04:05:40:060PM	Plasma	Ok
33	04:12:52:020PM	Plasma	Ok
34	04:21:05:960PM	Plasma	Ok
35	04:28:42:450PM	Plasma	Ok
36	04:36:14:180PM	Plasma	Ok
37	04:44:05:560PM	Plasma	Ok