Alcator C-Mod Run 970606 Information

Miniproposals

Miniproposal: 171a

Date Filed: 5/21/1997

Title: 40MHz RF Conditioning and Testing

First Author: Yuichi Takase

Session Leader: Yuichi Takase (shots 1-40)

Operators
Session leader(s):	Yuichi Takase
Physics operator(s):	Robert Granetz
Engineering operator(s):	Frank Silva,Vinny Bertolino

Engineering Operator Run Comment
MP171,MP160/GRANETZ/SILVA,COCHRAN/BERTOLINO,TERY SETUP PER 970605032

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:16:743PM

Author: To Be Determined

MP171A 40MHz Testing/Conditioning
Try to complete MP171A
May be able to do some of MP178 MCCD

SL: Takase
PO: Granetz

The 40MHz RF system ran reliably at a power level of 2MW.
The decoupler stub was rechecked last night with vacuum load,
and adequate isolation between the two main transmission lines
was observed. However, the behavior of the relative phase
between the antenna current straps connected to different
transmitters observed yesterday is not understood. Rather
than trying to figure out this problem, which would mean we
will lose the opportunity to do "physics experiments" with
the 40MHz system, we tried to do some preliminary exploration
of heating scenarios using the 40MHz system. Because of the
high H concentration (over 10% on shot 1, increasing to about
50% later in the run), D(H) minority heating or standard D(He3)
minority heating scenarios were not accessible. So we ended up
doing the D-He3-H mode conversion experiment. Since the usual
He3 piezo valve was dead, we used the capillary gas injection
system to inject He3. It was found that high He3 concentration
(about 10 torr-l) and "high field" (around 5T) produced the
best heating for both electrons and ions. Towards the end
of the run Brian started injecting nitrogen from his FSP probe.

Shot
01 dud Try for rampdown to 2.6T without He3
02 fiz
03 fiz
04 fiz
05 pla BT ramp down to 2.5T, no He3
1MW from FMIT#3, No FMIT#4, Not much heating
H/D about 10% according to Bruce's RGA (too high)
06 pla H/D a little higher, No high power pulse from FMIT #4
07 pla BT ramp down to 4.3T, 0.8MA, He3 puff from NINJA (A-B limiter) on
Prf(3)=0.8-0.95MW, Prf(4)=0.8-0.9MW
some e heating (about 5kJ), H/D rising during the shot
08 pla 4.5T, no high power from FMIT #4
09 pla 4.5T, near central e heating (about 10kJ)
10 fiz 4.7T
11 fiz
12 pla 4.7T, FMIT #4 crowbar after 1st pulse, heating is off-axis
13 fiz 4.7T, 2 capillaries for He3 (A-B limiter + inner wall)
14 pla 4.7T, near central e heating
15 pla 5.0T, off axis again, 40% H/H+D according to Weaver
16 fiz 3 capillaries (add inner nose)
17 fiz
18 pla 5.0T, 3 capillaries, neutrons (6e12n/s) + ion heating
19 pla same 6e12n/s, 10kJ
20 pla 5.3T, 1MA, a lot less nuetrons (0.4e12), a lot more H (RGA)
H/H+D=50% (CX)
21 pla 5.0T, 1MA, more neutrons (3e12), but lower than 18 & 19
22 fiz 4.7T, 1MA
23 pla 4.7T, 1MA 2.e12
24 pla disr 0.39s
25 pla 4.7T, 1MA, larger outer gap
26 pla 4.7T, 1MA, 2MW, 4e12n/s, slightly off-axis e heating
27 pla 5.0T, 1MA, 2MW, 6e12n/s, near axis e heating
28 pla disr 0.51s, 5.3T, 1MA attempt
29 fiz
30 pla 5.3T, 1MA, 2MW, 0.6e12n/s
maybe a problem with He3 resonance in front of antenna
31 fiz 5.1T, 1MA attempt with 6 capillaries
32 pla 5.0T, 1MA, 6 capillaries, 1.8e12n/s, got too much density
33 pla 5.0T, 1MA, 3 capillaries 600ms pulse (was 300ms)
didn't get any more He3 than with 300ms pulse
FMIT #4 tripped early, 2.e12n/s with 1MW
34 fiz 5.0T, 1MA, 4 capillaries
35 pla 5.0T, 1MA, 4 capillaries
FMIT #4 tripped early, 6.e12n/s for a short time, 2.e12n/s with 1MW
36 fiz
37 pla disr 0.74s
38 fiz
39 dud
40 dud

Physics Operator Summaries

Entered: Jul 7 2004 04:36:57:600PM

Author: To Be Determined

Physics operator summary for run 970606

MP 171A, 40 MHz RF conditioning and testing
MP 160 , Cryopump shakedown (maybe)

SL: Takase
PO: Granetz
EO: Bertolino, Silva

Summary: Good progress was made on further conditioning of the 40 MHz system
into He3 minority (majority ?) plasmas at B=2.6, 4.3, 4.5, 4.7, 5.0,
and 5.3 tesla, and Ip=0.6, 0.8, and 1.0 MA. Up to 2.2 MW of RF power
was put in. The scans were done because neutron flux and electron
heating were observed under some conditions. See the session leader's
summary to find out the latest guess at the heating scenario. The
machine ran okay until late in the day, when fizzles and duds became
more frequent. Insurmountable problems with the cryopump precluded
its testing today. The new "sparker" was in use all day today, but I
didn't notice any obvious effect.

Scorecard: 23 plasmas
14 fizzles
3 duds (1 due to a hybrid fault)
0 tests
----------
40 total

------------------------------------------------------------------------------
Run Plan for Friday, 970606:

We will pick up where we left off on Thursday, continuing with RF
conditioning (MP 171A) into He3 minority plasmas at 4 tesla (approx), and
perhaps try the cryopump again (MP 160).

Engineering setup for Friday 06 June 1997:

Overnight ECDC in deuterium.
Engineering setup as on 970605032, with TF under hybrid control

Gas setup - fill K-side with 20 PSI of D2, hybrid enable
fill B-top with 5 PSI of D2, hybrid enable
fill B-side-lower with 4 PSI of Ar, but do not hybrid enable
*******************************************************************************

** NOTE: ** We will again be puffing He3 with the NINJA system. The plenum
should already be filled with He3, so do not purge it. Don't
purge the B-side-upper either.

*******************************************************************************

The following gate valves should be enabled, assuming no vacuum problems
with the corresponding diagnostics:

ECE, TCI, PCX & TCX, VUV

-------------------------------------------------------------------------------
Detailed shot log:

Hybrid coldstart done; no problems.
Reload segment 1 from last shot of yesterday (970605032)
Reload segment 2 from shot 970528044 (2.8 T, 0.6 MA). The hope is
that there won't be much hydrogen isotope for the first shot or
two. I modified the TF to ramp down to 2.6 T instead of 2.8 T.

Note: Jim Irby has hooked up the "sparker" and it is turned on for the entire
run.

Note: No Helium3 for the first shot.

There is a delay to the start of the run due to data acquisition problems with
the RF camac.

Shot 01 -- Dud. Hybrid fault. Steve Wolfe is investigating. Nothing obvious,
but it may be a decoder. Test shot just now showed no problems.
Next shot: repeat attempt.

Shot 02 -- Fizzle. Null is fair.
Next shot: repeat attempt.

Shot 03 -- Fizzle.
Next shot: reduce Br offset from .0065 to .006

Shot 04 -- Fizzle. It bounced.
Next shot: reduce pre-fill from 25 to 22 ms.

Shot 05 -- Plasma. Good shot. Terminates at 1.49 s. Prf=1 MW in two pulses.
There were two very large impurity injections. No H-modes. Blip
reports a low hydrogen concentration (10%). Outboard gap is
10-15 mm. 2.54 T, 0.6 MA.
Next shot: no changes.

Shot 06 -- Plasma. Good shot. Terminates at 1.52 s. No impurity injections
on that shot. Prf=1 MW. H/D=10%. No good H-modes. 2.54 T, 0.6 MA.
Next shot: reload a 4.3 tesla shot into segment 2 and enable He3
puffing from the NINJA. Also enable the argon valve.

Shot 07 -- Plasma. Good shot. 4.3 T, 0.8 MA. Terminates at 1.45 s. He3 was
puffed. Prf=1.7 MW. The core TS got data.
Next shot: raise field to 4.5 tesla.

Shot 08 -- Plasma. Good shot. Terminates at 1.47 s. Prf=0.9 MW.
Next shot: program RXL to gradually move inward by 2 mm in order to
try and keep the strike point near probe 4 (as requested by Bruce)

Shot 09 -- Plasma. Good shot. Terminates at 1.47. B=4.46 tesla. Prf=2 MW.
Next shot: Ramp CLEARIN down a little faster after t=1.3 s, and
Increase field to 4.7 tesla.

Shot 10 -- Fizzle. 50 kA. Null is okay. Must have been the previous upward-
going rampdown VDE.
Next shot: tweak RXL again to further improve strike point control.

Shot 11 -- Fizzle. 50 kA. Null okay.
Next shot: reduce pre-fill from 22 to 19 ms.

Shot 12 -- Plasma. Good shot. Terminates at 1.47 s. Another upward-going
disruption late in the rampdown. Prf=1.9 MW. B=4.66 tesla.
Next shot: disable the argon valve. Raise He3 pressure in NINJA
slightly and turn on a second NINJA capillary (effectively doubling
the He3 input).

Shot 13 -- Fizzle. 50 kA.
Next shot: try again, no changes.

Shot 14 -- Plasma. Good shot. Terminates at 1.43 s. B=4.66 tesla. Prf=2 MW.
Another example of the argon making no difference to shot length.
Next shot: raise field to 5.0 tesla.

Shot 15 -- Plasma. Good shot. Terminates at 1.40 s. B=4.97 tesla. Prf=2 MW.
Next shot: increase He3 puff by turning on a third capillary.

Shot 16 -- Fizzle. Late breakdown. Null is fair.
Next shot: try again, no changes.

Shot 17 -- Fizzle. 50 kA. Null has bit of Br and Bz.
Next shot: reduce Br offset from .006 to .0055

Shot 18 -- Plasma. Good shot. Prf=2 MW. RF seems to have generated some
neutron flux. Three NINJA capillaries are puffing He3.
Next shot: raise pre-fill from 19 to 21 ms.

Shot 19 -- Plasma. Good shot. Prf=2.1 MW. A little more neutron flux (or is
it hard x-ray flux?) Density is a little higher than earlier today.
Next shot: Raise Ip to 1.0 MA and Btor to 5.3 tesla.

Shot 20 -- Plasma. Good shot. Terminates at 1.45 s. Prf=2.0 MW.
No neutrons this time. Density is again a little high.
B=5.40 tesla. Ip=1.0 MA.
Next shot: lower the field to 5.0 tesla, but keep Ip at 1 MA.

Shot 21 -- Plasma. Good shot. Terminates at 1.46 s. Prf=2.2 MW. Moderate
amount of neutrons.
Next shot: reduce field to 4.7 tesla.

Shot 22 -- Fizzle. 50 kA. Null is okay.
Next shot: try again, no changes.

Shot 23 -- Plasma. Good shot. Terminates at 1.47 s. B=4.70 tesla. Ip=1.0 MA.
Prf=1.9 MW. Some neutrons.
Next shot: increase outer by 4 mm by reducing RCUR be 2 mm.

Shot 24 -- Plasma, but hard disruption at 0.4 s due to huge density. The
density feedback to the hybrid failed, resulting in the high gas
demand. Ihalo_lower=110 kA.
Next shot: repeat with no changes.

Shot 25 -- Plasma. Good shot. Terminates at 1.47 s. Outer gap increased by
3 mm. Prf=1 MW because transmitter #4 faulted.
Next shot: no changes

Shot 26 -- Plasma. Good shot. Terminates at 1.48 s. Prf=2.0 MW. Lots of
neutron production again. Ip=1.0 MA, Bt=4.70 tesla.
Outer gap is 7-8 mm.
Next shot: increase field to 5.0 tesla

Shot 27 -- Plasma. Good shot. Terminates at 1.47 s. Prf=2.2 MW. Lots of
neutrons. Ip=1.0 MA, Bt=4.97 tesla.
Next shot: Brian has filled the B-FSP with nitrogen. The rest of
the NINJA system is still filled with He3. However, there will
be no N2 burp on the next shot.
Also, increase field to 5.3 tesla.
Also, tweak RXL again for Bruce (strikepoint control)

Shot 28 -- Plasma, but hard disruption at t=0.51 s. Ihalo_lower=170 kA.
Looks like a brick fell in.
Next shot: repeat with no changes.

Shot 29 -- Fizzle. Chalk it up to disruption recovery.
Next shot: try again, no changes

Shot 30 -- Plasma. Good shot. Terminates at 1.49 s. B=5.31 tesla. Ip=1.0 MA.
No neutrons.
Next shot: decrease field to 5.1 tesla.
Also increase He3 puff by using 6 NINJA capillaries.
Also enable nitrogen puffing from B-FSP.

Shot 31 -- Fizzle. 50 kA. Null is okay.
Next shot: decrease field to 5.0 tesla.

Shot 32 -- Plasma. Good shot. Terminated at 1.32 s, early in rampdown.
Prf=1.8 MW. There's a large density excursion around 0.4 s, which
may be due to the He3 puffing with 6 capillaries. No electron
heating observed.
Next shot: reduce number of NINJA capillaries being used, but
double the pulse length.

Shot 33 -- Plasma. Good shot. Terminated at 1.50 s. Prf=1.1 MW. There were
neutrons, even with the reduced power.
Next shot: add another capillary (that'll be 4) of He3.

Shot 34 -- Fizzle. 50 kA. Null is okay.
Next shot: increase pre-fill from 21 to 23 ms.

Shot 35 -- Plasma. Good shot. Terminated at 1.46 s. Prf=1.1 MW.
B=4.97 T, Ip=1.0 MA.
Next shot: repeat with no changes.

Shot 36 -- Fizzle. Late breakdown.
Next shot: reduce pre-fill from 23 to 18 ms.

Shot 37 -- Plasma, but disrupted at 0.74 s. Looks like a brick. Ihalo_l=130 kA.
Prf=1.3 MW.
Next shot: repeat, but reduce nitrogen pressure in the B-FSP plenum.

Shot 38 -- Fizzle. Disruption recovery.
Next shot: try again.

Shot 39 -- Dud! Null looks okay.
Next shot: increase pre-fill from 18 to 21 ms.

Shot 40 -- Dud!

End of run

Session Leader Comments

Jun 6 1997 09:10:21:900AM Yuichi Takase MP171A 40MHz Testing/Conditioning
Try to complete MP171A
May be able to do some of MP178 MCCD

Jun 6 1997 09:14:23:280AM 970606001 Yuichi Takase Dud (hybrid fault)
Try for rampdown to 2.6T without He3

Jun 6 1997 09:45:15:430AM 970606002 Yuichi Takase Fizzle

Jun 6 1997 09:45:22:020AM 970606003 Yuichi Takase Fizzle

Jun 6 1997 10:15:58:940AM 970606004 Yuichi Takase Fizzle

Jun 6 1997 10:23:07:620AM 970606005 Yuichi Takase Plasma
1MW from FMIT#3
No FMIT#4
Not much heating
H/D about 10% according to Bruce's RGA (too high)

Jun 6 1997 10:30:17:280AM 970606005 Yuichi Takase BT was ramped down to 2.5T, no He3

Jun 6 1997 10:30:59:190AM 970606006 Yuichi Takase Plasma
H/D a little higher, No high power pulse from FMIT #4

Jun 6 1997 11:01:25:750AM 970606007 Yuichi Takase Plasma
BT ramp down to 4.3T (0.8MA), He3 puff from NINJA on
Prf(3)=0.8-0.95MW, Prf(4)=0.8-0.9MW
some e heating (about 5kJ), H/D rising during the shot

Jun 6 1997 11:02:32:880AM 970606008 Yuichi Takase Plasma
4.5T, no high power from FMIT #4

Jun 6 1997 11:18:53:190AM 970606009 Yuichi Takase Plasma
4.5T, near central e heating (about 10kJ)

Jun 6 1997 11:19:20:760AM 970606010 Yuichi Takase Fizzle

Jun 6 1997 11:47:04:000AM 970606011 Yuichi Takase Fizzle

Jun 6 1997 12:01:08:970PM 970606012 Yuichi Takase Plasma
4.7T, FMIT #4 crowbar after 1st pulse, heating is off-axis
try more He3 for next shot using 2 capillaries (A-B limiter + inner wall)

Jun 6 1997 12:01:19:580PM 970606013 Yuichi Takase Fizzle

Jun 6 1997 12:17:14:540PM 970606014 Yuichi Takase Plasma
4.7T, 2 capillaries, near central e heating

Jun 6 1997 02:11:23:410PM 970606015 Yuichi Takase Plasma
5.0T, off axis again, 40% H/H+D according to Weaver

Jun 6 1997 02:11:47:000PM 970606016 Yuichi Takase Fizzle
3 capillaries (add inner nose)

Jun 6 1997 02:11:58:570PM 970606017 Yuichi Takase Fizzle

Jun 6 1997 02:12:22:240PM 970606018 Yuichi Takase Plasma
5.0T, 3 capillaries, neutrons (6e12n/s) + ion heating

Jun 6 1997 02:12:54:170PM 970606019 Yuichi Takase Plasma
same 6e12n/s

Jun 6 1997 02:13:15:840PM 970606020 Yuichi Takase Plasma
5.3T, 1MA, a lot less nuetrons (0.4e12), a lot more H (RGA)
H/H+D=50% (CX)

Jun 6 1997 02:13:30:430PM 970606021 Yuichi Takase Plasma
5.0T, 1MA, more neutrons (3e12), but lower than 18 & 19

Jun 6 1997 02:14:07:800PM 970606022 Yuichi Takase Fizzle
4.7T, 1MA attempt

Jun 6 1997 02:14:30:370PM 970606023 Yuichi Takase Plasma
4.7T, 1MA 2.e12n/s

Jun 6 1997 02:14:48:520PM 970606024 Yuichi Takase Plasma
disr 0.39s

Jun 6 1997 04:19:15:430PM 970606025 Yuichi Takase Plasma
4.7T, 1MA, larger outer gap

Jun 6 1997 04:19:37:350PM 970606026 Yuichi Takase Plasma
4.7T, 1MA, 2MW, 4e12n/s, slightly off-axis e heating

Jun 6 1997 04:19:53:670PM 970606027 Yuichi Takase Plasma
5.0T, 1MA, 2MW, 6e12n/s, near axis e heating

Jun 6 1997 04:20:12:880PM 970606028 Yuichi Takase Plasma
disr 0.51s, 5.3T, 1MA attempt

Jun 6 1997 04:20:23:880PM 970606029 Yuichi Takase Fizzle

Jun 6 1997 04:20:47:620PM 970606030 Yuichi Takase Plasma
5.3T, 1MA, 2MW, 0.6e12n/s
maybe a problem with He3 resonance in front of antenna

Jun 6 1997 04:21:16:010PM 970606031 Yuichi Takase Fizzle
5.1T, 1MA attempt with 6 capillaries

Jun 6 1997 04:21:43:640PM 970606032 Yuichi Takase Plasma
5.0T, 1MA, 6 capillaries, 1.8e12n/s, got too much density

Jun 6 1997 04:22:03:840PM 970606033 Yuichi Takase Plasma
5.0T, 1MA, 3 capillaries 600ms pulse (was 300ms)
didn't get any more He3 than with 300ms pulse
FMIT #4 tripped early, 2.e12n/s with 1MW

Jun 6 1997 04:22:23:410PM 970606034 Yuichi Takase Fizzle
5.0T, 1MA, 4 capillaries

Jun 6 1997 04:22:43:810PM 970606035 Yuichi Takase Plasma
5.0T, 1MA, 4 capillaries
FMIT #4 tripped early, 6.e12n/s for a short time, 2.e12n/s with 1MW

Jun 6 1997 04:23:49:020PM 970606036 Yuichi Takase Fizzle

Jun 6 1997 04:53:06:610PM 970606037 Yuichi Takase Plasma
disrupt @ 0.74s

Jun 6 1997 04:53:18:700PM 970606038 Yuichi Takase Fizzle

Jun 6 1997 04:53:49:100PM 970606039 Yuichi Takase Dud

Jun 6 1997 05:09:19:970PM 970606039 Yuichi Takase Dud

Jun 6 1997 05:09:30:650PM 970606040 Yuichi Takase Dud

Physics Operator Comments

Jun 6 1997 08:30:12:130AM Robert Granetz Run Plan for Friday, 970606:

We will pick up where we left off on Thursday, continuing with RF
conditioning (MP 171A) into He3 minority plasmas at 4 tesla (approx), and
perhaps try the cryopump again (MP 160).

Jun 6 1997 08:30:32:780AM Robert Granetz
Engineering setup for Friday 06 June 1997:

Overnight ECDC in deuterium.
Engineering setup as on 970605032, with TF under hybrid control

Gas setup - fill K-side with 20 PSI of D2, hybrid enable
fill B-top with 5 PSI of D2, hybrid enable
fill B-side-lower with 4 PSI of Ar, but do not hybrid enable
*******************************************************************************

** NOTE: ** We will again be puffing He3 with the NINJA system. The plenum
should already be filled with He3, so do not purge it. Don't
purge the B-side-upper either.

*******************************************************************************

The following gate valves should be enabled, assuming no vacuum problems
with the corresponding diagnostics:

ECE, TCI, PCX & TCX, VUV, and Moly monitor)

Jun 6 1997 08:49:11:900AM Robert Granetz
Note: Jim Irby has hooked up the "sparker" and it is turned on for the entire
run.

Jun 6 1997 08:48:59:050AM 970606001 Robert Granetz There is a delay to the start of the run due to data acquisition problems with
the RF camac.

Jun 6 1997 08:58:53:300AM 970606001 Robert Granetz
Note: No Helium3 for the first shot.

Jun 6 1997 09:05:31:830AM 970606001 Robert Granetz
Shot 01 -- Dud. Hybrid fault. Steve Wolfe is investigating.

Jun 6 1997 09:20:46:140AM 970606001 Robert Granetz
Hybrid coldstart done; no problems.
Reload segment 1 from last shot of yesterday (970605032)
Reload segment 2 from shot 970528044 (2.8 T, 0.6 MA). The hope is
that there won't be much hydrogen isotope for the first shot or
two. I modified the TF to ramp down to 2.6 T instead of 2.8 T.

Jun 6 1997 09:40:47:770AM 970606002 Robert Granetz
Shot 02 -- Fizzle. Null is fair.
Next shot: repeat attempt.

Jun 6 1997 09:46:09:990AM 970606003 Robert Granetz
Shot 03 -- Fizzle.
Next shot: reduce Br offset from .0065 to .006

Jun 6 1997 09:55:13:430AM 970606004 Robert Granetz Shot 04 -- Fizzle. It bounced.
Next shot: reduce pre-fill from 25 to 22 ms.

Jun 6 1997 10:36:10:980AM 970606005 Robert Granetz
Shot 05 -- Plasma. Good shot. Terminates at 1.49 s. Prf=1 MW in two pulses.
There were two very large impurity injections. No H-modes. Blip
reports a low hydrogen concentration (10%). Outboard gap is
10-15 mm. 2.54 T, 0.6 MA.
Next shot: no changes.

Jun 6 1997 10:35:43:520AM 970606006 Robert Granetz
Shot 06 -- Plasma. Good shot. Terminates at 1.52 s. No impurity injections
on that shot. Prf=1 MW. H/D=10%. No good H-modes. 2.54 T, 0.6 MA.
Next shot: reload a 4.3 tesla shot into segment 2 and enable He3
puffing from the NINJA. Also enable the argon valve.

Jun 6 1997 10:38:44:680AM 970606007 Robert Granetz Shot 07 -- Plasma. Good shot. 4.3 T, 0.8 MA. Terminates at 1.45 s. He3 was
puffed. Prf=1.7 MW. The core TS got data.
Next shot: raise field to 4.5 tesla.

Jun 6 1997 10:59:49:950AM 970606008 Robert Granetz Shot 08 -- Plasma. Good shot. Terminates at 1.47 s. Prf=0.9 MW.
Next shot: program RXL to gradually move inward by 2 mm in order to
try and keep the strike point near probe 4 (as requested by Bruce)

Jun 6 1997 11:12:05:300AM 970606009 Robert Granetz Shot 09 -- Plasma. Good shot. Terminates at 1.47. B=4.46 tesla. Prf=2 MW.
Next shot: Ramp CLEARIN down a little faster after t=1.3 s, and
Increase field to 4.7 tesla.

Jun 6 1997 11:22:23:280AM 970606010 Robert Granetz Shot 10 -- Fizzle. 50 kA. Null is okay. Must have been the previous upward-
going rampdown VDE.
Next shot: tweak RXL again to further improve strike point control.

Jun 6 1997 11:29:46:490AM 970606011 Robert Granetz Shot 11 -- Fizzle. 50 kA. Null okay.
Next shot: reduce pre-fill from 22 to 19 ms.

Jun 6 1997 11:55:57:190AM 970606012 Robert Granetz Shot 12 -- Plasma. Good shot. Terminates at 1.47 s. Another upward-going
disruption late in the rampdown. Prf=1.9 MW. B=4.66 tesla.
Next shot: disable the argon valve. Raise He3 pressure in NINJA
slightly and turn on a second NINJA capillary (effectively doubling
the He3 input).

Jun 6 1997 11:58:04:390AM 970606013 Robert Granetz Shot 13 -- Fizzle. 50 kA.
Next shot: try again, no changes.

Jun 6 1997 12:14:25:350PM 970606014 Robert Granetz Shot 14 -- Plasma. Good shot. Terminates at 1.43 s. B=4.66 tesla. Prf=2 MW.
Another example of the argon making no difference to shot length.
Next shot: raise field to 5.0 tesla.

Jun 6 1997 12:27:49:450PM 970606015 Robert Granetz Shot 15 -- Plasma. Good shot. Terminates at 1.40 s. B=4.97 tesla. Prf=2 MW.
Next shot: increase He3 puff by turning on a third capillary.

Jun 6 1997 12:38:10:700PM 970606016 Robert Granetz Shot 16 -- Fizzle. Late breakdown. Null is fair.
Next shot: try again, no changes.

Jun 6 1997 12:44:57:040PM 970606017 Robert Granetz Shot 17 -- Fizzle. 50 kA. Null has bit of Br and Bz.
Next shot: reduce Br offset from .006 to .0055

Jun 6 1997 12:56:24:030PM 970606018 Robert Granetz Shot 18 -- Plasma. Good shot. Prf=2 MW. RF seems to have generated some
neutron flux. Three NINJA capillaries are puffing He3.
Next shot: raise pre-fill from 19 to 21 ms.

Jun 6 1997 01:08:25:280PM 970606019 Robert Granetz Shot 19 -- Plasma. Good shot. Prf=2.1 MW. A little more neutron flux (or is
it hard x-ray flux?) Density is a little higher than earlier today.
Next shot: Raise Ip to 1.0 MA and Btor to 5.3 tesla.

Jun 6 1997 01:22:16:180PM 970606020 Robert Granetz Shot 20 -- Plasma. Good shot. Terminates at 1.45 s. Prf=2.0 MW.
No neutrons this time. Density is again a little high.
B=5.40 tesla. Ip=1.0 MA.
Next shot: lower the field to 5.0 tesla, but keep Ip at 1 MA.

Jun 6 1997 01:38:09:660PM 970606021 Robert Granetz Shot 21 -- Plasma. Good shot. Terminates at 1.46 s. Prf=2.2 MW. Moderate
amount of neutrons.
Next shot: reduce field to 4.7 tesla.

Jun 6 1997 01:46:58:370PM 970606022 Robert Granetz Shot 22 -- Fizzle. 50 kA. Null is okay.
Next shot: try again, no changes.

Jun 6 1997 01:59:28:070PM 970606023 Robert Granetz Shot 23 -- Plasma. Good shot. Terminates at 1.47 s. B=4.70 tesla. Ip=1.0 MA.
Prf=1.9 MW. Some neutrons.
Next shot: increase outer by 4 mm by reducing RCUR be 2 mm.

Jun 6 1997 02:17:10:960PM 970606024 Robert Granetz Shot 24 -- Plasma, but hard disruption at 0.4 s due to huge density. The
density feedback to the hybrid failed, resulting in the high gas
demand. Ihalo_lower=110 kA.
Next shot: repeat with no changes.

Jun 6 1997 02:29:17:650PM 970606025 Robert Granetz Shot 25 -- Plasma. Good shot. Terminates at 1.47 s. Outer gap increased by
3 mm. Prf=1 MW because transmitter #4 faulted.
Next shot: no changes

Jun 6 1997 02:40:23:200PM 970606026 Robert Granetz Shot 26 -- Plasma. Good shot. Terminates at 1.48 s. Prf=2.0 MW. Lots of
neutron production again. Ip=1.0 MA, Bt=4.70 tesla.
Outer gap is 7-8 mm.
Next shot: increase field to 5.0 tesla

Jun 6 1997 02:55:54:640PM 970606027 Robert Granetz Shot 27 -- Plasma. Good shot. Terminates at 1.47 s. Prf=2.2 MW. Lots of
neutrons. Ip=1.0 MA, Bt=4.97 tesla.
Next shot: Brian has filled the B-FSP with nitrogen. The rest of
the NINJA system is still filled with He3. However, there will
be no N2 burp on the next shot.
Also, increase field to 5.3 tesla.
Also, tweak RXL again for Bruce (strikepoint control)

Jun 6 1997 03:07:14:330PM 970606028 Robert Granetz Shot 28 -- Plasma, but hard disruption at t=0.51 s. Ihalo_lower=170 kA.
Looks like a brick fell in.
Next shot: repeat with no changes.

Jun 6 1997 03:12:47:590PM 970606029 Robert Granetz Shot 29 -- Fizzle. Chalk it up to disruption recovery.
Next shot: try again, no changes

Jun 6 1997 03:25:09:150PM 970606030 Robert Granetz Shot 30 -- Plasma. Good shot. Terminates at 1.49 s. B=5.31 tesla. Ip=1.0 MA.
No neutrons.
Next shot: decrease field to 5.1 tesla.
Also increase He3 puff by using 6 NINJA capillaries.
Also enable nitrogen puffing from B-FSP.

Jun 6 1997 03:35:42:730PM 970606031 Robert Granetz Shot 31 -- Fizzle. 50 kA. Null is okay.
Next shot: decrease field to 5.0 tesla.

Jun 6 1997 03:47:26:980PM 970606032 Robert Granetz Shot 32 -- Plasma. Good shot. Terminated at 1.32 s, early in rampdown.
Prf=1.8 MW. There's a large density excursion around 0.4 s, which
may be due to the He3 puffing with 6 capillaries. No electron
heating observed.
Next shot: reduce number of NINJA capillaries being used, but
double the pulse length.

Jun 6 1997 04:01:49:320PM 970606033 Robert Granetz Shot 33 -- Plasma. Good shot. Terminated at 1.50 s. Prf=1.1 MW. There were
neutrons, even with the reduced power.
Next shot: add another capillary (that'll be 4) of He3.

Jun 6 1997 04:06:27:910PM 970606034 Robert Granetz Shot 34 -- Fizzle. 50 kA. Null is okay.
Next shot: increase pre-fill from 21 to 23 ms.

Jun 6 1997 04:18:44:650PM 970606035 Robert Granetz Shot 35 -- Plasma. Good shot. Terminated at 1.46 s. Prf=1.1 MW.
B=4.97 T, Ip=1.0 MA.
Next shot: repeat with no changes.

Jun 6 1997 04:27:08:670PM 970606036 Robert Granetz Shot 36 -- Fizzle. Late breakdown.
Next shot: reduce pre-fill from 23 to 18 ms.

Jun 6 1997 04:36:33:400PM 970606037 Robert Granetz Shot 37 -- Plasma, but disrupted at 0.74 s. Looks like a brick. Ihalo_l=130 kA.
Prf=1.3 MW.
Next shot: repeat, but reduce nitrogen pressure in the B-FSP plenum.

Jun 6 1997 04:42:55:440PM 970606038 Robert Granetz Shot 38 -- Fizzle. Disruption recovery.
Next shot: try again.

Jun 6 1997 04:57:34:460PM 970606039 Robert Granetz Shot 39 -- Dud! Null looks okay.
Next shot: increase pre-fill from 18 to 21 ms.

Jun 6 1997 05:09:59:240PM 970606040 Robert Granetz Shot 40 -- Dud!

End of run

Engineering Operator Comments

Shot Time Type Status Comment

1 09:00:37:110AM Plasma Bad HBRID FAULT SHOT 1

2 09:34:25:810AM Plasma Ok

3 09:41:34:620AM Plasma Ok

4 09:48:34:120AM Plasma Ok

5 10:05:29:850AM Plasma Ok

6 10:16:12:480AM Plasma Ok

7 10:29:10:170AM Plasma Ok

8 10:42:09:440AM Plasma Ok

9 11:00:54:530AM Plasma Ok

10 11:14:36:040AM Plasma Ok

11 11:24:34:260AM Plasma Ok

12 11:32:25:930AM Plasma Ok

13 11:52:47:700AM Plasma Ok

14 12:00:59:120PM Plasma Ok

15 12:16:38:180PM Plasma Ok

16 12:33:34:030PM Plasma Ok

17 12:40:25:550PM Plasma Ok

18 12:47:44:500PM Plasma Ok

19 12:57:52:230PM Plasma Ok

20 01:10:00:930PM Plasma Ok

21 01:26:24:850PM Plasma Ok

22 01:42:00:470PM Plasma Ok

23 01:53:18:880PM Plasma Ok

24 02:07:35:690PM Plasma Ok

25 02:19:35:200PM Plasma Ok

26 02:32:58:380PM Plasma Ok

27 02:44:26:140PM Plasma Ok

28 02:56:58:550PM Plasma Ok

29 03:08:54:760PM Plasma Ok

30 03:15:40:970PM Plasma Ok

31 03:29:10:000PM Plasma Ok

32 03:37:32:960PM Plasma Ok

33 03:51:03:250PM Plasma Ok

34 04:02:04:430PM Plasma Ok

35 04:09:26:310PM Plasma Ok

36 04:20:07:990PM Plasma Ok

37 04:29:05:000PM Plasma Ok

38 04:39:46:820PM Plasma Ok

39 04:49:26:030PM Plasma Ok

40 05:00:15:640PM Plasma Ok

Session Leader Comments
Jun 6 1997 09:10:21:900AM		Yuichi Takase	MP171A 40MHz Testing/Conditioning Try to complete MP171A May be able to do some of MP178 MCCD
Jun 6 1997 09:14:23:280AM	970606001	Yuichi Takase	Dud (hybrid fault) Try for rampdown to 2.6T without He3
Jun 6 1997 09:45:15:430AM	970606002	Yuichi Takase	Fizzle
Jun 6 1997 09:45:22:020AM	970606003	Yuichi Takase	Fizzle
Jun 6 1997 10:15:58:940AM	970606004	Yuichi Takase	Fizzle
Jun 6 1997 10:23:07:620AM	970606005	Yuichi Takase	Plasma 1MW from FMIT#3 No FMIT#4 Not much heating H/D about 10% according to Bruce's RGA (too high)
Jun 6 1997 10:30:17:280AM	970606005	Yuichi Takase	BT was ramped down to 2.5T, no He3
Jun 6 1997 10:30:59:190AM	970606006	Yuichi Takase	Plasma H/D a little higher, No high power pulse from FMIT #4
Jun 6 1997 11:01:25:750AM	970606007	Yuichi Takase	Plasma BT ramp down to 4.3T (0.8MA), He3 puff from NINJA on Prf(3)=0.8-0.95MW, Prf(4)=0.8-0.9MW some e heating (about 5kJ), H/D rising during the shot
Jun 6 1997 11:02:32:880AM	970606008	Yuichi Takase	Plasma 4.5T, no high power from FMIT #4
Jun 6 1997 11:18:53:190AM	970606009	Yuichi Takase	Plasma 4.5T, near central e heating (about 10kJ)
Jun 6 1997 11:19:20:760AM	970606010	Yuichi Takase	Fizzle
Jun 6 1997 11:47:04:000AM	970606011	Yuichi Takase	Fizzle
Jun 6 1997 12:01:08:970PM	970606012	Yuichi Takase	Plasma 4.7T, FMIT #4 crowbar after 1st pulse, heating is off-axis try more He3 for next shot using 2 capillaries (A-B limiter + inner wall)
Jun 6 1997 12:01:19:580PM	970606013	Yuichi Takase	Fizzle
Jun 6 1997 12:17:14:540PM	970606014	Yuichi Takase	Plasma 4.7T, 2 capillaries, near central e heating
Jun 6 1997 02:11:23:410PM	970606015	Yuichi Takase	Plasma 5.0T, off axis again, 40% H/H+D according to Weaver
Jun 6 1997 02:11:47:000PM	970606016	Yuichi Takase	Fizzle 3 capillaries (add inner nose)
Jun 6 1997 02:11:58:570PM	970606017	Yuichi Takase	Fizzle
Jun 6 1997 02:12:22:240PM	970606018	Yuichi Takase	Plasma 5.0T, 3 capillaries, neutrons (6e12n/s) + ion heating
Jun 6 1997 02:12:54:170PM	970606019	Yuichi Takase	Plasma same 6e12n/s
Jun 6 1997 02:13:15:840PM	970606020	Yuichi Takase	Plasma 5.3T, 1MA, a lot less nuetrons (0.4e12), a lot more H (RGA) H/H+D=50% (CX)
Jun 6 1997 02:13:30:430PM	970606021	Yuichi Takase	Plasma 5.0T, 1MA, more neutrons (3e12), but lower than 18 & 19
Jun 6 1997 02:14:07:800PM	970606022	Yuichi Takase	Fizzle 4.7T, 1MA attempt
Jun 6 1997 02:14:30:370PM	970606023	Yuichi Takase	Plasma 4.7T, 1MA 2.e12n/s
Jun 6 1997 02:14:48:520PM	970606024	Yuichi Takase	Plasma disr 0.39s
Jun 6 1997 04:19:15:430PM	970606025	Yuichi Takase	Plasma 4.7T, 1MA, larger outer gap
Jun 6 1997 04:19:37:350PM	970606026	Yuichi Takase	Plasma 4.7T, 1MA, 2MW, 4e12n/s, slightly off-axis e heating
Jun 6 1997 04:19:53:670PM	970606027	Yuichi Takase	Plasma 5.0T, 1MA, 2MW, 6e12n/s, near axis e heating
Jun 6 1997 04:20:12:880PM	970606028	Yuichi Takase	Plasma disr 0.51s, 5.3T, 1MA attempt
Jun 6 1997 04:20:23:880PM	970606029	Yuichi Takase	Fizzle
Jun 6 1997 04:20:47:620PM	970606030	Yuichi Takase	Plasma 5.3T, 1MA, 2MW, 0.6e12n/s maybe a problem with He3 resonance in front of antenna
Jun 6 1997 04:21:16:010PM	970606031	Yuichi Takase	Fizzle 5.1T, 1MA attempt with 6 capillaries
Jun 6 1997 04:21:43:640PM	970606032	Yuichi Takase	Plasma 5.0T, 1MA, 6 capillaries, 1.8e12n/s, got too much density
Jun 6 1997 04:22:03:840PM	970606033	Yuichi Takase	Plasma 5.0T, 1MA, 3 capillaries 600ms pulse (was 300ms) didn't get any more He3 than with 300ms pulse FMIT #4 tripped early, 2.e12n/s with 1MW
Jun 6 1997 04:22:23:410PM	970606034	Yuichi Takase	Fizzle 5.0T, 1MA, 4 capillaries
Jun 6 1997 04:22:43:810PM	970606035	Yuichi Takase	Plasma 5.0T, 1MA, 4 capillaries FMIT #4 tripped early, 6.e12n/s for a short time, 2.e12n/s with 1MW
Jun 6 1997 04:23:49:020PM	970606036	Yuichi Takase	Fizzle
Jun 6 1997 04:53:06:610PM	970606037	Yuichi Takase	Plasma disrupt @ 0.74s
Jun 6 1997 04:53:18:700PM	970606038	Yuichi Takase	Fizzle
Jun 6 1997 04:53:49:100PM	970606039	Yuichi Takase	Dud
Jun 6 1997 05:09:19:970PM	970606039	Yuichi Takase	Dud
Jun 6 1997 05:09:30:650PM	970606040	Yuichi Takase	Dud

Physics Operator Comments
Jun 6 1997 08:30:12:130AM		Robert Granetz	Run Plan for Friday, 970606: We will pick up where we left off on Thursday, continuing with RF conditioning (MP 171A) into He3 minority plasmas at 4 tesla (approx), and perhaps try the cryopump again (MP 160).
Jun 6 1997 08:30:32:780AM		Robert Granetz	Engineering setup for Friday 06 June 1997: Overnight ECDC in deuterium. Engineering setup as on 970605032, with TF under hybrid control Gas setup - fill K-side with 20 PSI of D2, hybrid enable fill B-top with 5 PSI of D2, hybrid enable fill B-side-lower with 4 PSI of Ar, but do not hybrid enable ***************************************************************************** NOTE: We will again be puffing He3 with the NINJA system. The plenum should already be filled with He3, so do not purge it. Don't purge the B-side-upper either. ***************************************************************************** The following gate valves should be enabled, assuming no vacuum problems with the corresponding diagnostics: ECE, TCI, PCX & TCX, VUV, and Moly monitor)
Jun 6 1997 08:49:11:900AM		Robert Granetz	Note: Jim Irby has hooked up the "sparker" and it is turned on for the entire run.
Jun 6 1997 08:48:59:050AM	970606001	Robert Granetz	There is a delay to the start of the run due to data acquisition problems with the RF camac.
Jun 6 1997 08:58:53:300AM	970606001	Robert Granetz	Note: No Helium3 for the first shot.
Jun 6 1997 09:05:31:830AM	970606001	Robert Granetz	Shot 01 -- Dud. Hybrid fault. Steve Wolfe is investigating.
Jun 6 1997 09:20:46:140AM	970606001	Robert Granetz	Hybrid coldstart done; no problems. Reload segment 1 from last shot of yesterday (970605032) Reload segment 2 from shot 970528044 (2.8 T, 0.6 MA). The hope is that there won't be much hydrogen isotope for the first shot or two. I modified the TF to ramp down to 2.6 T instead of 2.8 T.
Jun 6 1997 09:40:47:770AM	970606002	Robert Granetz	Shot 02 -- Fizzle. Null is fair. Next shot: repeat attempt.
Jun 6 1997 09:46:09:990AM	970606003	Robert Granetz	Shot 03 -- Fizzle. Next shot: reduce Br offset from .0065 to .006
Jun 6 1997 09:55:13:430AM	970606004	Robert Granetz	Shot 04 -- Fizzle. It bounced. Next shot: reduce pre-fill from 25 to 22 ms.
Jun 6 1997 10:36:10:980AM	970606005	Robert Granetz	Shot 05 -- Plasma. Good shot. Terminates at 1.49 s. Prf=1 MW in two pulses. There were two very large impurity injections. No H-modes. Blip reports a low hydrogen concentration (10%). Outboard gap is 10-15 mm. 2.54 T, 0.6 MA. Next shot: no changes.
Jun 6 1997 10:35:43:520AM	970606006	Robert Granetz	Shot 06 -- Plasma. Good shot. Terminates at 1.52 s. No impurity injections on that shot. Prf=1 MW. H/D=10%. No good H-modes. 2.54 T, 0.6 MA. Next shot: reload a 4.3 tesla shot into segment 2 and enable He3 puffing from the NINJA. Also enable the argon valve.
Jun 6 1997 10:38:44:680AM	970606007	Robert Granetz	Shot 07 -- Plasma. Good shot. 4.3 T, 0.8 MA. Terminates at 1.45 s. He3 was puffed. Prf=1.7 MW. The core TS got data. Next shot: raise field to 4.5 tesla.
Jun 6 1997 10:59:49:950AM	970606008	Robert Granetz	Shot 08 -- Plasma. Good shot. Terminates at 1.47 s. Prf=0.9 MW. Next shot: program RXL to gradually move inward by 2 mm in order to try and keep the strike point near probe 4 (as requested by Bruce)
Jun 6 1997 11:12:05:300AM	970606009	Robert Granetz	Shot 09 -- Plasma. Good shot. Terminates at 1.47. B=4.46 tesla. Prf=2 MW. Next shot: Ramp CLEARIN down a little faster after t=1.3 s, and Increase field to 4.7 tesla.
Jun 6 1997 11:22:23:280AM	970606010	Robert Granetz	Shot 10 -- Fizzle. 50 kA. Null is okay. Must have been the previous upward- going rampdown VDE. Next shot: tweak RXL again to further improve strike point control.
Jun 6 1997 11:29:46:490AM	970606011	Robert Granetz	Shot 11 -- Fizzle. 50 kA. Null okay. Next shot: reduce pre-fill from 22 to 19 ms.
Jun 6 1997 11:55:57:190AM	970606012	Robert Granetz	Shot 12 -- Plasma. Good shot. Terminates at 1.47 s. Another upward-going disruption late in the rampdown. Prf=1.9 MW. B=4.66 tesla. Next shot: disable the argon valve. Raise He3 pressure in NINJA slightly and turn on a second NINJA capillary (effectively doubling the He3 input).
Jun 6 1997 11:58:04:390AM	970606013	Robert Granetz	Shot 13 -- Fizzle. 50 kA. Next shot: try again, no changes.
Jun 6 1997 12:14:25:350PM	970606014	Robert Granetz	Shot 14 -- Plasma. Good shot. Terminates at 1.43 s. B=4.66 tesla. Prf=2 MW. Another example of the argon making no difference to shot length. Next shot: raise field to 5.0 tesla.
Jun 6 1997 12:27:49:450PM	970606015	Robert Granetz	Shot 15 -- Plasma. Good shot. Terminates at 1.40 s. B=4.97 tesla. Prf=2 MW. Next shot: increase He3 puff by turning on a third capillary.
Jun 6 1997 12:38:10:700PM	970606016	Robert Granetz	Shot 16 -- Fizzle. Late breakdown. Null is fair. Next shot: try again, no changes.
Jun 6 1997 12:44:57:040PM	970606017	Robert Granetz	Shot 17 -- Fizzle. 50 kA. Null has bit of Br and Bz. Next shot: reduce Br offset from .006 to .0055
Jun 6 1997 12:56:24:030PM	970606018	Robert Granetz	Shot 18 -- Plasma. Good shot. Prf=2 MW. RF seems to have generated some neutron flux. Three NINJA capillaries are puffing He3. Next shot: raise pre-fill from 19 to 21 ms.
Jun 6 1997 01:08:25:280PM	970606019	Robert Granetz	Shot 19 -- Plasma. Good shot. Prf=2.1 MW. A little more neutron flux (or is it hard x-ray flux?) Density is a little higher than earlier today. Next shot: Raise Ip to 1.0 MA and Btor to 5.3 tesla.
Jun 6 1997 01:22:16:180PM	970606020	Robert Granetz	Shot 20 -- Plasma. Good shot. Terminates at 1.45 s. Prf=2.0 MW. No neutrons this time. Density is again a little high. B=5.40 tesla. Ip=1.0 MA. Next shot: lower the field to 5.0 tesla, but keep Ip at 1 MA.
Jun 6 1997 01:38:09:660PM	970606021	Robert Granetz	Shot 21 -- Plasma. Good shot. Terminates at 1.46 s. Prf=2.2 MW. Moderate amount of neutrons. Next shot: reduce field to 4.7 tesla.
Jun 6 1997 01:46:58:370PM	970606022	Robert Granetz	Shot 22 -- Fizzle. 50 kA. Null is okay. Next shot: try again, no changes.
Jun 6 1997 01:59:28:070PM	970606023	Robert Granetz	Shot 23 -- Plasma. Good shot. Terminates at 1.47 s. B=4.70 tesla. Ip=1.0 MA. Prf=1.9 MW. Some neutrons. Next shot: increase outer by 4 mm by reducing RCUR be 2 mm.
Jun 6 1997 02:17:10:960PM	970606024	Robert Granetz	Shot 24 -- Plasma, but hard disruption at 0.4 s due to huge density. The density feedback to the hybrid failed, resulting in the high gas demand. Ihalo_lower=110 kA. Next shot: repeat with no changes.
Jun 6 1997 02:29:17:650PM	970606025	Robert Granetz	Shot 25 -- Plasma. Good shot. Terminates at 1.47 s. Outer gap increased by 3 mm. Prf=1 MW because transmitter #4 faulted. Next shot: no changes
Jun 6 1997 02:40:23:200PM	970606026	Robert Granetz	Shot 26 -- Plasma. Good shot. Terminates at 1.48 s. Prf=2.0 MW. Lots of neutron production again. Ip=1.0 MA, Bt=4.70 tesla. Outer gap is 7-8 mm. Next shot: increase field to 5.0 tesla
Jun 6 1997 02:55:54:640PM	970606027	Robert Granetz	Shot 27 -- Plasma. Good shot. Terminates at 1.47 s. Prf=2.2 MW. Lots of neutrons. Ip=1.0 MA, Bt=4.97 tesla. Next shot: Brian has filled the B-FSP with nitrogen. The rest of the NINJA system is still filled with He3. However, there will be no N2 burp on the next shot. Also, increase field to 5.3 tesla. Also, tweak RXL again for Bruce (strikepoint control)
Jun 6 1997 03:07:14:330PM	970606028	Robert Granetz	Shot 28 -- Plasma, but hard disruption at t=0.51 s. Ihalo_lower=170 kA. Looks like a brick fell in. Next shot: repeat with no changes.
Jun 6 1997 03:12:47:590PM	970606029	Robert Granetz	Shot 29 -- Fizzle. Chalk it up to disruption recovery. Next shot: try again, no changes
Jun 6 1997 03:25:09:150PM	970606030	Robert Granetz	Shot 30 -- Plasma. Good shot. Terminates at 1.49 s. B=5.31 tesla. Ip=1.0 MA. No neutrons. Next shot: decrease field to 5.1 tesla. Also increase He3 puff by using 6 NINJA capillaries. Also enable nitrogen puffing from B-FSP.
Jun 6 1997 03:35:42:730PM	970606031	Robert Granetz	Shot 31 -- Fizzle. 50 kA. Null is okay. Next shot: decrease field to 5.0 tesla.
Jun 6 1997 03:47:26:980PM	970606032	Robert Granetz	Shot 32 -- Plasma. Good shot. Terminated at 1.32 s, early in rampdown. Prf=1.8 MW. There's a large density excursion around 0.4 s, which may be due to the He3 puffing with 6 capillaries. No electron heating observed. Next shot: reduce number of NINJA capillaries being used, but double the pulse length.
Jun 6 1997 04:01:49:320PM	970606033	Robert Granetz	Shot 33 -- Plasma. Good shot. Terminated at 1.50 s. Prf=1.1 MW. There were neutrons, even with the reduced power. Next shot: add another capillary (that'll be 4) of He3.
Jun 6 1997 04:06:27:910PM	970606034	Robert Granetz	Shot 34 -- Fizzle. 50 kA. Null is okay. Next shot: increase pre-fill from 21 to 23 ms.
Jun 6 1997 04:18:44:650PM	970606035	Robert Granetz	Shot 35 -- Plasma. Good shot. Terminated at 1.46 s. Prf=1.1 MW. B=4.97 T, Ip=1.0 MA. Next shot: repeat with no changes.
Jun 6 1997 04:27:08:670PM	970606036	Robert Granetz	Shot 36 -- Fizzle. Late breakdown. Next shot: reduce pre-fill from 23 to 18 ms.
Jun 6 1997 04:36:33:400PM	970606037	Robert Granetz	Shot 37 -- Plasma, but disrupted at 0.74 s. Looks like a brick. Ihalo_l=130 kA. Prf=1.3 MW. Next shot: repeat, but reduce nitrogen pressure in the B-FSP plenum.
Jun 6 1997 04:42:55:440PM	970606038	Robert Granetz	Shot 38 -- Fizzle. Disruption recovery. Next shot: try again.
Jun 6 1997 04:57:34:460PM	970606039	Robert Granetz	Shot 39 -- Dud! Null looks okay. Next shot: increase pre-fill from 18 to 21 ms.
Jun 6 1997 05:09:59:240PM	970606040	Robert Granetz	Shot 40 -- Dud! End of run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:00:37:110AM	Plasma	Bad	HBRID FAULT SHOT 1
2	09:34:25:810AM	Plasma	Ok
3	09:41:34:620AM	Plasma	Ok
4	09:48:34:120AM	Plasma	Ok
5	10:05:29:850AM	Plasma	Ok
6	10:16:12:480AM	Plasma	Ok
7	10:29:10:170AM	Plasma	Ok
8	10:42:09:440AM	Plasma	Ok
9	11:00:54:530AM	Plasma	Ok
10	11:14:36:040AM	Plasma	Ok
11	11:24:34:260AM	Plasma	Ok
12	11:32:25:930AM	Plasma	Ok
13	11:52:47:700AM	Plasma	Ok
14	12:00:59:120PM	Plasma	Ok
15	12:16:38:180PM	Plasma	Ok
16	12:33:34:030PM	Plasma	Ok
17	12:40:25:550PM	Plasma	Ok
18	12:47:44:500PM	Plasma	Ok
19	12:57:52:230PM	Plasma	Ok
20	01:10:00:930PM	Plasma	Ok
21	01:26:24:850PM	Plasma	Ok
22	01:42:00:470PM	Plasma	Ok
23	01:53:18:880PM	Plasma	Ok
24	02:07:35:690PM	Plasma	Ok
25	02:19:35:200PM	Plasma	Ok
26	02:32:58:380PM	Plasma	Ok
27	02:44:26:140PM	Plasma	Ok
28	02:56:58:550PM	Plasma	Ok
29	03:08:54:760PM	Plasma	Ok
30	03:15:40:970PM	Plasma	Ok
31	03:29:10:000PM	Plasma	Ok
32	03:37:32:960PM	Plasma	Ok
33	03:51:03:250PM	Plasma	Ok
34	04:02:04:430PM	Plasma	Ok
35	04:09:26:310PM	Plasma	Ok
36	04:20:07:990PM	Plasma	Ok
37	04:29:05:000PM	Plasma	Ok
38	04:39:46:820PM	Plasma	Ok
39	04:49:26:030PM	Plasma	Ok
40	05:00:15:640PM	Plasma	Ok