Alcator C-Mod Run 970618 Information

Miniproposals

Miniproposal: 175

Date Filed: 5/20/1997

Title: Deep Tracer-Gas Injection Experiments

First Author: Francesca Bombarda

Session Leader: Brian Labombard (shots 1-35)

Operators
Session leader(s):	Brian Labombard
Physics operator(s):	Robert Granetz
Engineering operator(s):	Frank Silva,Bill Cochran

Engineering Operator Run Comment
MP175/Granetz/Terry/Bertolino/Setup of 970617033

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:16:960PM

Author: To Be Determined

Session Leader's summary of run 970618

MP 175, Deep Tracer-Gas Injection Experiments

SL: Labombard
PO: Granetz
EO: Silva, Cochran

--------------------------------------------------------------------------------
Here was the plan:
--------------------------------------------------------------------------------

Run Plan for first attempt of "Deep-Tracer Gas Experiments"

First goal: Record NII and NIII plumes on F-top camera
during reversed flow conditions near separatrix
on outer divertor. Record doppler shift in NII,
NIII lines with toroidal view of FSP.

Second goal: Determine screening properties of SOL to nitrogen
and argon impurities. Inject at various depths in SOL.
Monitor Li-like N (McPherson) and H-like Ar (HIREX)
inside LCFS. Monitor N and Ar in divertor (CHROMEX...).

Third goal: Record HeI and HeII plumes on F-top camera
during reversed flow conditions near separatrix
on outer divertor. Record doppler shift in HeII lines
with toroidal view of FSP and toroidal view of A-B
limiter.

Target Plasmas:
All plasmas will be 0.8 MA, 5.3 Tesla, diverted, ohmic
shots (similar to 970617033) with optimized FSP target.
RF may be injected after 1.1 sec for conditioning.

Three different flat-top plasma densities will be required:
(A) low density - NL04 = 0.5 to 0.6x10^20 - reversed flow (Yes, we need it that low!)
(B) medium density - NL04 = 1.0x10^20 - high recycling
(C) high density - NL04 > 1.3x10^20 - detached divertor

Lower Div Cap Gas Setup:
Purge NINJA plenum. Continue with 78 torr N2 currently in FSP plenum.

Shot Sequence:

1-4 Start from 970617033 with NL04=1.0x10^20. Tune up FSP target to
provide 3 different insertion depths into SOL at .6, .8, and 1.0 sec.
Increase right gap to 2.0 cm. Obtain SSEP > 2 cm. Set x-point location
to make FSP telescope fiber#2-2 see separatrix. Set up FSP to
inject 10^18 molecules N2 per scan.

5-7 Optimize and record non-reversed flow NII and NIII plumes on F-top camera.

8-10 Change to low density, (A).
Optimize and record reversed flow, NII and NIII plumes on F-top camera.

11-13 Back to medium density, (B). Increase N2 pressure in FSP plenum as needed
(up to 300 torr) to get good N signals in core and divertor.

14-15 Set to low density, (A). Repeat screening measurements in reversed flow condition.

16-17 Set to high density, (C). Repeat screening measurements in detached condition.

18-20 Back to medium density, (B). Change to Ar in FSP plenum. Increase pressure as needed
(up to 300 torr) to get good Ar signals in core and divertor.

21-22 Set to low density, (A). Repeat screening measurements in reversed flow condition.

23-24 Set to high density, (C). Repeat screening measurements in detached condition.

25-28 Back to medium density, (B). Change to 75 torr He in FSP plenum. Put 200 torr He
in NINJA plenum. Puff through A33-001 capillary (A-B limiter).
Optimize and record non-reversed flow HeI and HeII plumes on F-top camera.

29-30 Change to low density, (A) NL04 = 0.5 to 0.6x10^20.
Optimize and record reversed flow, HeI and HeII plumes on F-top camera.

--------------------------------------------------------------------------------
Here was the result:
--------------------------------------------------------------------------------

First goal: We got a couple NII plumes and a few good NIII plumes
recorded on the F-top camera. These will allow us to
start doing some simple analysis. We got no NI data. (The
filter would not fit in the filter wheel!)
As one might expect, just when we finally got a string of good
shots, the scanning probe decided to scan only once per shot. A loose
circuit board was discovered after the run.
The local plasma conditions at the injection point were
significantly perturbed by the plume. This may cloud
the interpretation.
No Doppler data were recorded for the small N2 injections.
The signals were too weak on the U. Maryland
spectrometer. (Can the intensifier be used?)

Second goal: We got two shots with the probe burping a lot of N2 at the
separatrix (low density case). Clear signatures on Li-like N were seen by
the McPherson spectrometer. Then we got one shot with the probe
burping 4 mm (mapped to midplane) outside the LCFS. The
surprizing result is that the Li-like N signature was exactly
the same. Does this mean that there is no SOL screening?!
We may have gotten some Doppler information on these large-injections.
However, these 'plumes' were highly perturbing (e.g., on one shot, they
affected the core density!)
No data was taken at the mid and high density conditions.
No Ar data was taken.

Third goal: No data

Some detailed notes:
Plumes:
NL04 - 0.95x10^20
Shot #2 - setting up FSP target
Shot #3 - setting up FSP target
Shot #9 - NII plumes seen
Shot #12 - three NII plumes seen- weak, strong, saturated
Shot #13 - NII plumes seen
Shot #14 - only one probe scan! (*&$% hardware problem!) no plumes
Shot #15 - Good first NIII plume, no second or third scans (*&$% hardware problem again!)
NL04 - 0.7x10^20
Shot #16 - Good first NIII plume, no second or third scans (*&$% hardware problem)
Shot #18 - One good probe scan, no gas injection
Shot #19 - One good probe scan. NIII plume, still at separatrix
Shot #21 - Got three probe scans - three NIII plumes (still near separatrix)
Shot #22 - Got three NIII plumes

Screening:
Shot #25 - Increased plenum pressure to 350 torr N2 - too much N2 injected!
Nitrogen puffs shows up on NL04!!
Shot #26 - Set plenum pressure to 199 torr N2.
Two screening injections at LCFS. Both seen on Li-like N signal (McPherson)
Shot #31 - One injection at LCFS. Same Li-like N signal
Shot #34 - One injection at rho=4 mm -> same Li-like N signal!! Where is the screening?

Final Note:
On the next day, the burping-scanning probe got hit by a disruption (shot# 970619023)
which knocked out another Langmuir probe (down to two now) and also destroyed the
operation of the inertial valve. So there will be no more 'plumes' or screening
experiments with the FSP until the probe head can be repaired. Unfortunately,
this requires a spare probe head to be built and a vacuum break to install it.

Physics Operator Summaries

Entered: Jul 7 2004 04:36:57:753PM

Author: To Be Determined

Physics operator summary for run 970618

MP 175, Deep Tracer-Gas Injection Experiments

SL: Labombard
PO: Granetz
EO: Silva, Cochran

Summary: Not the easiest of run days. The reproducibility of the current
rampup was not great today. There was a lot of time lost chasing down
a recurring intermittant problem with the hybrid wavegen, and it was
not resolved. Nevertheless, there were enough plasmas for Brian to
get a good number of nitrogen plumes at various depths in the SOL, at
medium and low density. Because of the required constraints on the
inner and outer gaps, FSP strike location, and the divertor strike
location, the plasma was always close to being vertically unstable.
This improved markedly when we went to lower density. There was not
enough time to switch to other gases. See Brian's run leader's
summary for detailed plume and screening results.

Scorecard: 19 plasmas
12 fizzles
4 duds (3 due to a hybrid problem)
0 tests
----------
35 total

------------------------------------------------------------------------------
Run Plan for Wednesday, 970618:

MP 175 -- Deep Tracer-Gas Injection Experiments:
Impurity puffing and plume observation using the burping FSP.
Ip=0.8 MA, Bt=5.3 T, vary the density. Nitrogen will be puffed
from the B-FSP multiple times during each shot. It is likely that
other gases (argon and/or helium) will be used as well. We will
also be continuing to bring up the ICRF 80 MHz systems.

Engineering setup for Wednesday 18 June 1997:

Overnight ECDC in deuterium.
Engineering setup as on 970617033, 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, hybrid enable

Please purge the NINJA plenum before the run.

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

ECE, PCX, TCX, VUV

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

Hybrid coldstart done; no problems.
Reload last plasma shot of yesterday (970618033), B=5.3 tesla
Reduce plasma current to 0.8 MA.
Reduce nl_04 to 1.0e20 m-2.
Reduce RCUR by 2.5 mm to increase outer gap from 1.0 to 1.5 cm.

Shot 01 -- Fizzle. Null okay. Pre-fill pressure is high (9e-5 torr).

Next shot: reduce pre-fill pulse from 29 to 22 ms.

Shot 02 -- Plasma. Disrupts at 1.02 s. Some camac errors on magnetics (no
halo signals, nor BP_JK's, so no EFIT). Magnetics data was
recovered manually. EFIT re-run manually. Plasma went vertically
unstable (upward). The elongation went up to 1.7.

Next shot: Move ZCUR down from -1.5 to -2.0 cm to reduce elongation.

Shot 03 -- Plasma. Disrupts at 1.12 s. ZCUR moved down about 3 mm, but
elongation reached 1.7 at the end. Vertically unstable again.

Next shot: Move ZXL down by 5 mm. (These are paired to keep
Move RXL out by 5 mm. the strike point unchanged)
Move ZCUR down again by 5 mm more.
Let RCUR increase by 2.5 mm after t=1.2 s.

Shot 04 -- Fizzle. 50 kA.

Next shot: reduce pre-fill from 22 to 20 ms.

Shot 05 -- Fizzle. 50 kA. Null has a bit of radial field.

Next shot: reduce Br offset from .0075 to .007.

Shot 06 -- Dud. No power supplies due to hybrid problem. No wavegen outputs
from hybrid.

Next shot: try again, no changes

Shot 07 -- Dud. Hybrid failed again. Steve Wolfe took a hybrid test
shot just now (after shot 07) and got no output from the hybrid.

We'll have a break for cell access at this time.

A hybrid coldstart has just been done, and now the test shots are
working.

Next shot: try again, no changes

Shot 08 -- Dud. Hybrid failed again.

Steve Wolfe, Josh Stillerman, and Tom Fredian are troubleshooting.
They have confirmed that the wavegen definitely has non-zero values
that it's supposed to output. The problem seems to be intermittant
triggering of the wavegen. An extensive look at the hardware in the
interface room did not find anything obviously loose or
disconnected. All other camac is triggering properly.

Next shot: try again, no changes

Shot 09 -- Plasma, disrupted at 1.0 s. Vertically unstable again, although
the elongation was not excessive on this shot.

Next shot: program a 5 mm ramp into both RXL and ZXL (for FSP)

Shot 10 -- Plasma, disrupted at 0.52 s, vertically unstable again.

Next shot: lower ZCUR by another 3 mm.

Shot 11 -- Fizzle. Null looks okay. Chalk it up to disruption (upward)
recovery.

Next shot: no changes

Shot 12 -- Plasma. Disrupts at 1.14 s due to vertical instability. Brian
reports that the edge positioning with respect to the fast scanning
probe is "excellent".

Next shot: tweak RCUR out after t=1.10 s.

Shot 13 -- Plasma. Disrupts at 1.10 s due to vertical instability.

Next shot: reduce CLEARIN by 1 mm.

Shot 14 -- Plasma. Good shot. Terminates at 1.44 s.

Next shot: enable the lithium pellet injector at t=1.15 s.

Shot 15 -- Plasma. Disrupts at 1.10 s (previous shot also showed some vertical
oscillations at that time).

Next shot: reduce density to nl_04=0.6e20 m-2.

Shot 16 -- Plasma. Good shot. Terminates at 1.66 s. Got the lower
density (nl_04=0.7e20 m-2). The FSP has only been able to fire
once during the shot for the previous several shots. (It had been
firing 3 times per shot.) LPI fired, but there was no pellet.

Next shot: no changes

Shot 17 -- Fizzle.

Next shot: try again, no changes

Shot 18 -- Plasma. Good shot. Terminates at 1.62 s. Lithium pellet
injected at 1.15 s, with large perturbations to ne and Te. The
breakdown just barely made it.

Next shot: add 10 amps to EF4 (make it less negative).

Shot 19 -- Plasma. Good shot. Terminates at 1.66 s.

Next shot: repeat, no changes.

Shot 20 -- Plasma, disrupted at 0.61 s due to vertical instability. The FSP
got hit.

Next shot: no changes, except enable a post-shot puff test of
deuterium from the new J-bottom valve.

Shot 21 -- Plasma. Good shot. Terminates at 1.68 s. FSP got all three scans
this time.

Next shot: Move J-bottom deuterium puff to 1.3 s

Shot 22 -- Plasma. Good shot. Terminates at 1.67 s. Looks like we got the
J-bottom signal, but no puff.

Next shot: Move J-bottom D2 puff to 1.4 s, for 0.1 s.
Increase amount of N2 from B-FSP also (by alot).

Shot 23 -- Fizzle. 50 kA

Next shot: tweak EF4 again

Shot 24 -- Fizzle. Still too much Bz

Next shot: reduce EF4 by 15 amps (make more negative)

Shot 25 -- Plasma, disrupted at 0.84 s. The B-FSP N2 puffing was very
perturbative, and is seen on many different diagnostic signals.

Next shot: reduce the B-FSP plenum pressure. Also give another
tweak to EF4.

Shot 26 -- Plasma. Good shot. Terminates at 1.68 s. Prf=0.4 MW.

Next shot: Move RXL 3 mm inside after t=0.60 s, and
Move ZXL 3 mm up, after t=0.60 s.
Put N2 into the J-bottom plenum.

Shot 27 -- Fizzle. Very late breakdown.

Next shot: increase Br offset from .007 to .0075

Shot 28 -- Plasma, disrupted at 0.48 s. Looks like it was a big impurity
injection.

Next shot: repeat, no changes

Shot 29 -- Fizzle. 50 kA. Null looks okay.

Next shot: repeat, no changes

Shot 30 -- Fizzle.

Next shot: raise RCUR offset from 6600 to 6800.

Shot 31 -- Plasma. Good shot. Terminates at 1.68 s. Prf=0.85 MW.

Next shot: reduce argon puff by 2 ms (as requested by John Rice).

Shot 32 -- Fizzle. Late breakdown. Null looks okay.

Next shot: reduce pre-fill puff from 20 to 17 ms.
Change J-bottom plenum back to deuterium, at 20 psi.
Add 2 ms back to the argon puff (requested by John Rice)

Shot 33 -- Fizzle. Too much Br

Next shot: reduce Br offset from .0075 to .007

Shot 34 -- Plasma. Good shot. Terminates at 1.68 s. Prf>1 MW. Looks like
there was some dithering during the RF pulse.

Next shot: no changes.

Shot 35 -- Dud!

End of run.

Session Leader Comments

Jun 18 1997 09:06:44:130AM 970618002 Brian Labombard FSP not firing . First plasma shot

F-Top Filter: NII
Exposure: 7

FSP timing:

FSPGas Enabled: No
trigger:
duration:
plenum:

NINJA Enabled: No
trigger:
duration:
capillary:
plenum:

U. Maryland:
Line: NII
Wavelength: 5000 A

Jun 18 1997 09:44:43:770AM 970618003 Brian Labombard FSP not firing. Setting up equilibrium.
NL04: 0.97
F-Top Filter: NII
Exposure: 7
FSP timing:
FSPGas Enabled: No
trigger:
duration:
plenum:
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000 A

Jun 18 1997 12:05:12:290PM 970618009 Brian Labombard FSP firing/burping
Three scans to LCFS. Disrupts after last scan
NL04: 0.92
F-Top Filter: NII
Exposure: 7
FSP timing: .592, .782, .981
FSPGas Enabled: Yes
trigger: .3
duration: .4
plenum: 78 torr N2
NINJA Enabled: Yes
trigger: .4
duration: .1
capillary: A33-001 (A/B limiter)
plenum: 173 torr N2
U. Maryland:
Line: NII
Wavelength: 5000

3 NII plumes seen

Jun 18 1997 12:07:52:870PM 970618010 Brian Labombard FSP scanning /burping
Disrupted at 0.51

Jun 18 1997 12:38:34:550PM 970618012 Brian Labombard FSP scanning/burping
NL04: .95
F-Top Filter: NII
Exposure: 5
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .3
duration: .4
plenum: 78 torr N2
NINJA Enabled: Yes
trigger: .4
duration: .1
capillary: A33-001
plenum: 171 torr N2
U. Maryland:
Line: NII
Wavelength: 6482 A
NII plumes seen. First one very weak, stronger, then saturated.

Jun 18 1997 12:55:03:940PM 970618013 Brian Labombard FSP scanning/burping
NL04: .96
F-Top Filter: NII
Exposure: 7
FSP timing: .592, .787, .981
FSPGas Enabled: Y
trigger: .3
duration: .4
plenum: 78 torr N2
NINJA Enabled: no
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NIII
Wavelength: 6482 A

NII plumes seen.

Jun 18 1997 12:56:21:990PM 970618014 Brian Labombard FSP scanning/burping
NL04: .93
F-Top Filter: NIII
Exposure: 7
FSP timing: same
FSPGas Enabled: Yes
trigger: .3
duration: .4
plenum: 78 torr N@
NINJA Enabled: no
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line:
Wavelength:
Only one probe scan. No plumes.

Jun 18 1997 01:04:49:660PM 970618015 Brian Labombard FSP scanning/burping
NL04: .93
F-Top Filter: NIII
Exposure: 7
FSP timing:
FSPGas Enabled: Yes
trigger: .1
duration: .4
plenum: 78 torr
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NIII
Wavelength: 4530

Good first plume. No second and third scans.

Jun 18 1997 01:22:55:350PM 970618016 Brian Labombard FSP scanning/probe
NL04: 0.7
F-Top Filter: NIII
Exposure: 7
FSP timing:
FSPGas Enabled: Yes
trigger: .592, .981
duration: .1
plenum: .4
NINJA Enabled: no
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000
Good first plume. Only one scan.

Jun 18 1997 01:39:21:300PM 970618018 Brian Labombard FSP scanning No burping
NL04: 0.72
F-Top Filter:
Exposure:
FSP timing: .592, .787, .981
FSPGas Enabled: No
trigger:
duration:
plenum:
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: H-alpha
Wavelength:

Only one probe scan.

Jun 18 1997 01:53:38:980PM 970618019 Brian Labombard FSP Scanning/Burping
NL04:
F-Top Filter: NIII
Exposure: 7
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .1
duration: .4
plenum: 78 torr N2
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000 A

Good first plume, still at separatrix. Only one probe scan.

Jun 18 1997 02:36:24:700PM 970618021 Brian Labombard FSP scanning/burping
NL04: 0.7
F-Top Filter: NIII
Exposure: 7
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .1
duration: .4
plenum: 78 torr N2
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NIV
Wavelength: 3461

Got three plumes!

Jun 18 1997 02:51:14:580PM 970618022 Brian Labombard FSP scanning/burping
NL04: 0.7
F-Top Filter: NIII
Exposure: 7
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .1
duration: .4
plenum: 78 torr N2
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000 A

Three NIII plumes

Jun 18 1997 03:25:12:110PM 970618025 Brian Labombard FSP scanning/burping
NL04: 0.7
F-Top Filter: NIII
Exposure: 7
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .2
duration: .3
plenum: 348 torr N2
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000 A

Too much N2 injected!

Jun 18 1997 03:42:57:710PM 970618026 Brian Labombard FSP scanning/burping
NL04: 0.7
F-Top Filter: NIII
Exposure: 7
Gain: 7
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: ..2
duration: .3
plenum: 199 torr
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000

Two saturate plumes. Third scan did not go.

Jun 18 1997 04:31:05:670PM 970618031 Brian Labombard FSP scanning /burping
NL04: 0.65
F-Top Filter: NIII
Exposure: 5
Gain: 3
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .2
duration: .3
plenum: 199 torr N2
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NIV
Wavelength: 3460 A

Only one scan.

Jun 18 1997 10:28:03:620PM 970618034 Brian Labombard FSP scanning/burping
NL04: 0.7
F-Top Filter: NIII
Exposure: 7
Gain: 3
FSP timing: .592, .787, .981
FSPGas Enabled: Yes
trigger: .2
duration: .3
plenum: 199 torr N2
NINJA Enabled: No
trigger:
duration:
capillary:
plenum:
U. Maryland:
Line: NII
Wavelength: 5000

Only one FSP scan.
Injected 10 mm outside LCFS - > same Li-like N signal as LCFS injection.

Physics Operator Comments

Jun 18 1997 08:24:30:120AM Robert Granetz Run Plan for Wednesday, 970618:

MP 175 -- Deep Tracer-Gas Injection Experiments:
Impurity puffing and plume observation using the burping FSP.
Ip=0.8 MA, Bt=5.3 T, vary the density. Nitrogen will be puffed
from the B-FSP multiple times during each shot. It is likely that
other gases (argon and/or helium) will be used as well.

Engineering setup for Wednesday 18 June 1997:

Overnight ECDC in deuterium.
Engineering setup as on 970617033, 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, hybrid enable

Please purge the NINJA plenum before the run.

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

ECE, PCX, TCX, VUV

Jun 18 1997 08:50:55:410AM Robert Granetz Prior to shot 01:

Hybrid coldstart done; no problems.
Reload last plasma shot of yesterday (970618033), B=5.3 tesla
Reduce plasma current to 0.8 MA.
Reduce nl_04 to 1.0e20 m-2.
Reduce RCUR by 2.5 mm to increase outer gap from 1.0 to 1.5 cm.

Jun 18 1997 08:50:01:990AM 970618001 Robert Granetz Shot 01 -- Fizzle. Null okay. Pre-fill pressure is high (9e-5 torr).

Next shot: reduce pre-fill pulse from 29 to 22 ms.

Jun 18 1997 09:22:20:740AM 970618002 Robert Granetz Shot 02 -- Plasma. Disrupts at 1.02 s. Some camac errors on magnetics (no
halo signals, nor BP_JK's, so no EFIT). Magnetics data was
recovered manually. EFIT re-run manually. Plasma went vertically
unstable (upward). The elongation went up to 1.7.

Next shot: Move ZCUR down from -1.5 to -2.0 cm to reduce elongation.

Jun 18 1997 09:42:03:500AM 970618003 Robert Granetz Shot 03 -- Plasma. Disrupts at 1.12 s. ZCUR moved down about 3 mm, but
elongation reached 1.7 at the end. Vertically unstable again.

Next shot: Move ZXL down by 5 mm. (These are paired to keep
Move RXL out by 5 mm. the strike point unchanged)
Move ZCUR down again by 5 mm more.
Let RCUR increase by 2.5 mm after t=1.2 s.

Jun 18 1997 09:47:27:580AM 970618004 Robert Granetz Shot 04 -- Fizzle. 50 kA.

Next shot: reduce pre-fill from 22 to 20 ms.

Jun 18 1997 09:56:16:040AM 970618005 Robert Granetz Shot 05 -- Fizzle. 50 kA. Null has a bit of radial field.

Next shot: reduce Br offset from .0075 to .007.

Jun 18 1997 10:04:37:640AM 970618006 Robert Granetz Shot 06 -- Dud. No power supplies due to hybrid problem. No wavegen outputs
from hybrid.

Next shot: try again, no changes

Jun 18 1997 10:15:37:980AM 970618007 Robert Granetz Shot 07 -- Dud. Hybrid failed again. Steve Wolfe took a hybrid test
shot just now (after shot 07) and got no output from the hybrid.

We'll have a break for cell access at this time.

Jun 18 1997 10:29:36:610AM 970618007 Robert Granetz A hybrid coldstart has just been done, and now the test shots are
working.

Next shot: try again, no changes

Jun 18 1997 11:46:29:010AM 970618008 Robert Granetz Shot 08 -- Dud. Hybrid failed again.

Steve Wolfe, Josh Stillerman, and Tom Fredian are troubleshooting.
They have confirmed that the wavegen definitely has non-zero values
that it's supposed to output. The problem seems to be intermittant
triggering of the wavegen. An extensive look at the hardware in the
interface room did not find anything obviously loose or
disconnected. All other camac is triggering properly.

Next shot: try again, no changes

Jun 18 1997 12:00:47:330PM 970618009 Robert Granetz Shot 09 -- Plasma, disrupted at 1.0 s. Vertically unstable again, although
the elongation was not excessive on this shot.

Next shot: program a 5 mm ramp into both RXL and ZXL (for FSP)

Jun 18 1997 12:11:10:710PM 970618010 Robert Granetz Shot 10 -- Plasma, disrupted at 0.52 s, vertically unstable again.

Next shot: lower ZCUR by another 3 mm.

Jun 18 1997 12:21:05:380PM 970618011 Robert Granetz Shot 11 -- Fizzle. Null looks okay. Chalk it up to disruption (upward)
recovery.

Next shot: no changes

Jun 18 1997 12:31:59:240PM 970618012 Robert Granetz Shot 12 -- Plasma. Disrupts at 1.14 s due to vertical instability. Brian
reports that the edge positioning with respect to the fast scanning
probe is "excellent".

Next shot: tweak RCUR out after t=1.10 s.

Jun 18 1997 12:39:35:380PM 970618013 Robert Granetz Shot 13 -- Plasma. Disrupts at 1.10 s due to vertical instability.

Next shot: reduce CLEARIN by 1 mm.

Jun 18 1997 12:53:39:970PM 970618014 Robert Granetz Shot 14 -- Plasma. Good shot. Terminates at 1.44 s.

Next shot: enable the lithium pellet injector at t=1.15 s.

Jun 18 1997 01:05:03:140PM 970618015 Robert Granetz Shot 15 -- Plasma. Disrupts at 1.10 s (previous shot also showed some vertical
oscillations at that time).

Next shot: reduce density to nl_04=0.6e20 m-2.

Jun 18 1997 01:28:36:200PM 970618016 Robert Granetz Shot 16 -- Plasma. Good shot. Terminates at 1.66 s. Got the lower
density (nl_04=0.7e20 m-2). The FSP has only been able to fire
once during the shot for the previous several shots. (It had been
firing 3 times per shot.) LPI fired, but there was no pellet.

Next shot: no changes

Jun 18 1997 01:30:27:230PM 970618017 Robert Granetz Shot 17 -- Fizzle.

Next shot: try again, no changes

Jun 18 1997 01:41:53:880PM 970618018 Robert Granetz Shot 18 -- Plasma. Good shot. Terminates at 1.66 s. Lithium pellet
injected at 1.15 s, with large perturbations to ne and Te. The
breakdown just barely made it.

Next shot: add 10 amps to EF4 (make it less negative).

Jun 18 1997 01:53:11:380PM 970618019 Robert Granetz Shot 19 -- Plasma. Good shot. Terminates at 1.66 s.

Next shot: repeat, no changes.

Jun 18 1997 03:43:54:550PM 970618020 Robert Granetz Shot 20 -- Plasma, disrupted at 0.61 s due to vertical instability. The FSP
got hit.

Next shot: no changes, except enable a post-shot puff test of
deuterium from the new J-bottom valve.

Jun 18 1997 03:43:22:400PM 970618021 Robert Granetz Shot 21 -- Plasma. Good shot. Terminates at 1.68 s. FSP got all three scans
this time.

Next shot: Move J-bottom deuterium puff to 1.3 s

Jun 18 1997 03:42:18:140PM 970618022 Robert Granetz Shot 22 -- Plasma. Good shot. Terminates at 1.67 s. Looks like we got the
J-bottom signal, but no puff.

Next shot: Move J-bottom D2 puff to 1.4 s, for 0.1 s.
Increase amount of N2 from B-FSP also (by alot).

Jun 18 1997 03:03:58:650PM 970618023 Robert Granetz Shot 23 -- Fizzle. 50 kA

Next shot: tweak EF4 again

Jun 18 1997 03:12:07:930PM 970618024 Robert Granetz Shot 24 -- Fizzle. Still too much Bz

Next shot: reduce EF4 by 15 amps (make more negative)

Jun 18 1997 03:40:51:650PM 970618026 Robert Granetz Shot 26 -- Plasma. Good shot. Terminates at 1.68 s. Prf=0.4 MW.

Next shot: Move RXL 3 mm inside after t=0.60 s, and
Move ZXL 3 mm up, after t=0.60 s.
Put N2 into the J-bottom plenum.

Jun 18 1997 03:57:41:960PM 970618027 Robert Granetz Shot 27 -- Fizzle. Very late breakdown.

Next shot: increase Br offset from .007 to .0075

Jun 18 1997 04:06:43:310PM 970618028 Robert Granetz Shot 28 -- Plasma, disrupted at 0.48 s. Looks like it was a big impurity
injection.

Next shot: repeat, no changes

Jun 18 1997 04:13:17:140PM 970618029 Robert Granetz Shot 29 -- Fizzle. 50 kA. Null looks okay.

Next shot: repeat, no changes

Jun 18 1997 04:21:03:050PM 970618030 Robert Granetz Shot 30 -- Fizzle.

Next shot: raise RCUR offset from 6600 to 6800.

Jun 18 1997 04:33:55:240PM 970618031 Robert Granetz Shot 31 -- Plasma. Good shot. Terminates at 1.68 s. Prf=0.85 MW.

Next shot: reduce argon puff by 2 ms (as requested by John Rice).

Jun 18 1997 04:43:57:810PM 970618032 Robert Granetz Shot 32 -- Fizzle. Late breakdown. Null looks okay.

Next shot: reduce pre-fill puff from 20 to 17 ms.
Change J-bottom plenum back to deuterium, at 20 psi.
Add 2 ms back to the argon puff (requested by John Rice)

Jun 18 1997 04:49:33:620PM 970618033 Robert Granetz Shot 33 -- Fizzle. Too much Br

Next shot: reduce Br offset from .0075 to .007

Jun 18 1997 04:59:27:820PM 970618034 Robert Granetz Shot 34 -- Plasma. Good shot. Terminates at 1.68 s. Prf>1 MW. Looks like
there was some dithering during the RF pulse.

Next shot: no changes.

Jun 18 1997 05:16:48:520PM 970618035 Robert Granetz Shot 35 -- Dud!

End of run.

Engineering Operator Comments

Shot Time Type Status Comment

1 08:43:30:850AM Test Ok

2 09:02:55:000AM Plasma Ok o2l comm fault caused by P disruption

3 09:23:57:710AM Plasma Ok

4 09:41:41:400AM Plasma Ok

5 09:50:05:980AM Plasma Ok

6 09:58:12:360AM Test Ok

7 10:06:03:460AM Test Ok

8 10:43:52:840AM Test Ok

9 11:48:50:850AM Test Ok

10 12:04:36:060PM Plasma Ok

11 12:14:35:610PM Plasma Ok

12 12:22:06:830PM Plasma Ok

13 12:34:02:360PM Plasma Ok

14 12:45:19:140PM Plasma Ok

15 12:57:11:420PM Plasma Ok

16 01:08:52:170PM Plasma Ok

17 01:26:06:820PM Plasma Ok

18 01:32:58:270PM Plasma Ok

19 01:44:11:980PM Plasma Ok

20 01:53:55:320PM Plasma Ok

21 02:27:11:210PM Plasma Ok

22 02:40:20:020PM Plasma Ok

23 02:54:57:100PM Plasma Ok

24 03:04:41:760PM Plasma Ok

25 03:13:40:460PM Plasma Ok

26 03:27:14:700PM Plasma Ok

27 03:52:30:040PM Plasma Ok

28 03:59:37:330PM Plasma Ok

29 04:08:20:360PM Plasma Ok

30 04:15:19:940PM Plasma Ok

31 04:22:33:110PM Plasma Ok

32 04:34:48:270PM Plasma Ok

33 04:44:53:450PM Plasma Ok

34 04:51:43:920PM Plasma Ok

35 05:00:36:010PM Plasma Ok

Session Leader Comments
Jun 18 1997 09:06:44:130AM	970618002	Brian Labombard	FSP not firing . First plasma shot F-Top Filter: NII Exposure: 7 FSP timing: FSPGas Enabled: No trigger: duration: plenum: NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 A
Jun 18 1997 09:44:43:770AM	970618003	Brian Labombard	FSP not firing. Setting up equilibrium. NL04: 0.97 F-Top Filter: NII Exposure: 7 FSP timing: FSPGas Enabled: No trigger: duration: plenum: NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 A
Jun 18 1997 12:05:12:290PM	970618009	Brian Labombard	FSP firing/burping Three scans to LCFS. Disrupts after last scan NL04: 0.92 F-Top Filter: NII Exposure: 7 FSP timing: .592, .782, .981 FSPGas Enabled: Yes trigger: .3 duration: .4 plenum: 78 torr N2 NINJA Enabled: Yes trigger: .4 duration: .1 capillary: A33-001 (A/B limiter) plenum: 173 torr N2 U. Maryland: Line: NII Wavelength: 5000 3 NII plumes seen
Jun 18 1997 12:07:52:870PM	970618010	Brian Labombard	FSP scanning /burping Disrupted at 0.51
Jun 18 1997 12:38:34:550PM	970618012	Brian Labombard	FSP scanning/burping NL04: .95 F-Top Filter: NII Exposure: 5 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .3 duration: .4 plenum: 78 torr N2 NINJA Enabled: Yes trigger: .4 duration: .1 capillary: A33-001 plenum: 171 torr N2 U. Maryland: Line: NII Wavelength: 6482 A NII plumes seen. First one very weak, stronger, then saturated.
Jun 18 1997 12:55:03:940PM	970618013	Brian Labombard	FSP scanning/burping NL04: .96 F-Top Filter: NII Exposure: 7 FSP timing: .592, .787, .981 FSPGas Enabled: Y trigger: .3 duration: .4 plenum: 78 torr N2 NINJA Enabled: no trigger: duration: capillary: plenum: U. Maryland: Line: NIII Wavelength: 6482 A NII plumes seen.
Jun 18 1997 12:56:21:990PM	970618014	Brian Labombard	FSP scanning/burping NL04: .93 F-Top Filter: NIII Exposure: 7 FSP timing: same FSPGas Enabled: Yes trigger: .3 duration: .4 plenum: 78 torr N@ NINJA Enabled: no trigger: duration: capillary: plenum: U. Maryland: Line: Wavelength: Only one probe scan. No plumes.
Jun 18 1997 01:04:49:660PM	970618015	Brian Labombard	FSP scanning/burping NL04: .93 F-Top Filter: NIII Exposure: 7 FSP timing: FSPGas Enabled: Yes trigger: .1 duration: .4 plenum: 78 torr NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NIII Wavelength: 4530 Good first plume. No second and third scans.
Jun 18 1997 01:22:55:350PM	970618016	Brian Labombard	FSP scanning/probe NL04: 0.7 F-Top Filter: NIII Exposure: 7 FSP timing: FSPGas Enabled: Yes trigger: .592, .981 duration: .1 plenum: .4 NINJA Enabled: no trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 Good first plume. Only one scan.
Jun 18 1997 01:39:21:300PM	970618018	Brian Labombard	FSP scanning No burping NL04: 0.72 F-Top Filter: Exposure: FSP timing: .592, .787, .981 FSPGas Enabled: No trigger: duration: plenum: NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: H-alpha Wavelength: Only one probe scan.
Jun 18 1997 01:53:38:980PM	970618019	Brian Labombard	FSP Scanning/Burping NL04: F-Top Filter: NIII Exposure: 7 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .1 duration: .4 plenum: 78 torr N2 NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 A Good first plume, still at separatrix. Only one probe scan.
Jun 18 1997 02:36:24:700PM	970618021	Brian Labombard	FSP scanning/burping NL04: 0.7 F-Top Filter: NIII Exposure: 7 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .1 duration: .4 plenum: 78 torr N2 NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NIV Wavelength: 3461 Got three plumes!
Jun 18 1997 02:51:14:580PM	970618022	Brian Labombard	FSP scanning/burping NL04: 0.7 F-Top Filter: NIII Exposure: 7 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .1 duration: .4 plenum: 78 torr N2 NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 A Three NIII plumes
Jun 18 1997 03:25:12:110PM	970618025	Brian Labombard	FSP scanning/burping NL04: 0.7 F-Top Filter: NIII Exposure: 7 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .2 duration: .3 plenum: 348 torr N2 NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 A Too much N2 injected!
Jun 18 1997 03:42:57:710PM	970618026	Brian Labombard	FSP scanning/burping NL04: 0.7 F-Top Filter: NIII Exposure: 7 Gain: 7 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: ..2 duration: .3 plenum: 199 torr NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 Two saturate plumes. Third scan did not go.
Jun 18 1997 04:31:05:670PM	970618031	Brian Labombard	FSP scanning /burping NL04: 0.65 F-Top Filter: NIII Exposure: 5 Gain: 3 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .2 duration: .3 plenum: 199 torr N2 NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NIV Wavelength: 3460 A Only one scan.
Jun 18 1997 10:28:03:620PM	970618034	Brian Labombard	FSP scanning/burping NL04: 0.7 F-Top Filter: NIII Exposure: 7 Gain: 3 FSP timing: .592, .787, .981 FSPGas Enabled: Yes trigger: .2 duration: .3 plenum: 199 torr N2 NINJA Enabled: No trigger: duration: capillary: plenum: U. Maryland: Line: NII Wavelength: 5000 Only one FSP scan. Injected 10 mm outside LCFS - > same Li-like N signal as LCFS injection.

Physics Operator Comments
Jun 18 1997 08:24:30:120AM		Robert Granetz	Run Plan for Wednesday, 970618: MP 175 -- Deep Tracer-Gas Injection Experiments: Impurity puffing and plume observation using the burping FSP. Ip=0.8 MA, Bt=5.3 T, vary the density. Nitrogen will be puffed from the B-FSP multiple times during each shot. It is likely that other gases (argon and/or helium) will be used as well. Engineering setup for Wednesday 18 June 1997: Overnight ECDC in deuterium. Engineering setup as on 970617033, 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, hybrid enable Please purge the NINJA plenum before the run. The following gate valves should be enabled, assuming no vacuum problems with the corresponding diagnostics: ECE, PCX, TCX, VUV
Jun 18 1997 08:50:55:410AM		Robert Granetz	Prior to shot 01: Hybrid coldstart done; no problems. Reload last plasma shot of yesterday (970618033), B=5.3 tesla Reduce plasma current to 0.8 MA. Reduce nl_04 to 1.0e20 m-2. Reduce RCUR by 2.5 mm to increase outer gap from 1.0 to 1.5 cm.
Jun 18 1997 08:50:01:990AM	970618001	Robert Granetz	Shot 01 -- Fizzle. Null okay. Pre-fill pressure is high (9e-5 torr). Next shot: reduce pre-fill pulse from 29 to 22 ms.
Jun 18 1997 09:22:20:740AM	970618002	Robert Granetz	Shot 02 -- Plasma. Disrupts at 1.02 s. Some camac errors on magnetics (no halo signals, nor BP_JK's, so no EFIT). Magnetics data was recovered manually. EFIT re-run manually. Plasma went vertically unstable (upward). The elongation went up to 1.7. Next shot: Move ZCUR down from -1.5 to -2.0 cm to reduce elongation.
Jun 18 1997 09:42:03:500AM	970618003	Robert Granetz	Shot 03 -- Plasma. Disrupts at 1.12 s. ZCUR moved down about 3 mm, but elongation reached 1.7 at the end. Vertically unstable again. Next shot: Move ZXL down by 5 mm. (These are paired to keep Move RXL out by 5 mm. the strike point unchanged) Move ZCUR down again by 5 mm more. Let RCUR increase by 2.5 mm after t=1.2 s.
Jun 18 1997 09:47:27:580AM	970618004	Robert Granetz	Shot 04 -- Fizzle. 50 kA. Next shot: reduce pre-fill from 22 to 20 ms.
Jun 18 1997 09:56:16:040AM	970618005	Robert Granetz	Shot 05 -- Fizzle. 50 kA. Null has a bit of radial field. Next shot: reduce Br offset from .0075 to .007.
Jun 18 1997 10:04:37:640AM	970618006	Robert Granetz	Shot 06 -- Dud. No power supplies due to hybrid problem. No wavegen outputs from hybrid. Next shot: try again, no changes
Jun 18 1997 10:15:37:980AM	970618007	Robert Granetz	Shot 07 -- Dud. Hybrid failed again. Steve Wolfe took a hybrid test shot just now (after shot 07) and got no output from the hybrid. We'll have a break for cell access at this time.
Jun 18 1997 10:29:36:610AM	970618007	Robert Granetz	A hybrid coldstart has just been done, and now the test shots are working. Next shot: try again, no changes
Jun 18 1997 11:46:29:010AM	970618008	Robert Granetz	Shot 08 -- Dud. Hybrid failed again. Steve Wolfe, Josh Stillerman, and Tom Fredian are troubleshooting. They have confirmed that the wavegen definitely has non-zero values that it's supposed to output. The problem seems to be intermittant triggering of the wavegen. An extensive look at the hardware in the interface room did not find anything obviously loose or disconnected. All other camac is triggering properly. Next shot: try again, no changes
Jun 18 1997 12:00:47:330PM	970618009	Robert Granetz	Shot 09 -- Plasma, disrupted at 1.0 s. Vertically unstable again, although the elongation was not excessive on this shot. Next shot: program a 5 mm ramp into both RXL and ZXL (for FSP)
Jun 18 1997 12:11:10:710PM	970618010	Robert Granetz	Shot 10 -- Plasma, disrupted at 0.52 s, vertically unstable again. Next shot: lower ZCUR by another 3 mm.
Jun 18 1997 12:21:05:380PM	970618011	Robert Granetz	Shot 11 -- Fizzle. Null looks okay. Chalk it up to disruption (upward) recovery. Next shot: no changes
Jun 18 1997 12:31:59:240PM	970618012	Robert Granetz	Shot 12 -- Plasma. Disrupts at 1.14 s due to vertical instability. Brian reports that the edge positioning with respect to the fast scanning probe is "excellent". Next shot: tweak RCUR out after t=1.10 s.
Jun 18 1997 12:39:35:380PM	970618013	Robert Granetz	Shot 13 -- Plasma. Disrupts at 1.10 s due to vertical instability. Next shot: reduce CLEARIN by 1 mm.
Jun 18 1997 12:53:39:970PM	970618014	Robert Granetz	Shot 14 -- Plasma. Good shot. Terminates at 1.44 s. Next shot: enable the lithium pellet injector at t=1.15 s.
Jun 18 1997 01:05:03:140PM	970618015	Robert Granetz	Shot 15 -- Plasma. Disrupts at 1.10 s (previous shot also showed some vertical oscillations at that time). Next shot: reduce density to nl_04=0.6e20 m-2.
Jun 18 1997 01:28:36:200PM	970618016	Robert Granetz	Shot 16 -- Plasma. Good shot. Terminates at 1.66 s. Got the lower density (nl_04=0.7e20 m-2). The FSP has only been able to fire once during the shot for the previous several shots. (It had been firing 3 times per shot.) LPI fired, but there was no pellet. Next shot: no changes
Jun 18 1997 01:30:27:230PM	970618017	Robert Granetz	Shot 17 -- Fizzle. Next shot: try again, no changes
Jun 18 1997 01:41:53:880PM	970618018	Robert Granetz	Shot 18 -- Plasma. Good shot. Terminates at 1.66 s. Lithium pellet injected at 1.15 s, with large perturbations to ne and Te. The breakdown just barely made it. Next shot: add 10 amps to EF4 (make it less negative).
Jun 18 1997 01:53:11:380PM	970618019	Robert Granetz	Shot 19 -- Plasma. Good shot. Terminates at 1.66 s. Next shot: repeat, no changes.
Jun 18 1997 03:43:54:550PM	970618020	Robert Granetz	Shot 20 -- Plasma, disrupted at 0.61 s due to vertical instability. The FSP got hit. Next shot: no changes, except enable a post-shot puff test of deuterium from the new J-bottom valve.
Jun 18 1997 03:43:22:400PM	970618021	Robert Granetz	Shot 21 -- Plasma. Good shot. Terminates at 1.68 s. FSP got all three scans this time. Next shot: Move J-bottom deuterium puff to 1.3 s
Jun 18 1997 03:42:18:140PM	970618022	Robert Granetz	Shot 22 -- Plasma. Good shot. Terminates at 1.67 s. Looks like we got the J-bottom signal, but no puff. Next shot: Move J-bottom D2 puff to 1.4 s, for 0.1 s. Increase amount of N2 from B-FSP also (by alot).
Jun 18 1997 03:03:58:650PM	970618023	Robert Granetz	Shot 23 -- Fizzle. 50 kA Next shot: tweak EF4 again
Jun 18 1997 03:12:07:930PM	970618024	Robert Granetz	Shot 24 -- Fizzle. Still too much Bz Next shot: reduce EF4 by 15 amps (make more negative)
Jun 18 1997 03:40:51:650PM	970618026	Robert Granetz	Shot 26 -- Plasma. Good shot. Terminates at 1.68 s. Prf=0.4 MW. Next shot: Move RXL 3 mm inside after t=0.60 s, and Move ZXL 3 mm up, after t=0.60 s. Put N2 into the J-bottom plenum.
Jun 18 1997 03:57:41:960PM	970618027	Robert Granetz	Shot 27 -- Fizzle. Very late breakdown. Next shot: increase Br offset from .007 to .0075
Jun 18 1997 04:06:43:310PM	970618028	Robert Granetz	Shot 28 -- Plasma, disrupted at 0.48 s. Looks like it was a big impurity injection. Next shot: repeat, no changes
Jun 18 1997 04:13:17:140PM	970618029	Robert Granetz	Shot 29 -- Fizzle. 50 kA. Null looks okay. Next shot: repeat, no changes
Jun 18 1997 04:21:03:050PM	970618030	Robert Granetz	Shot 30 -- Fizzle. Next shot: raise RCUR offset from 6600 to 6800.
Jun 18 1997 04:33:55:240PM	970618031	Robert Granetz	Shot 31 -- Plasma. Good shot. Terminates at 1.68 s. Prf=0.85 MW. Next shot: reduce argon puff by 2 ms (as requested by John Rice).
Jun 18 1997 04:43:57:810PM	970618032	Robert Granetz	Shot 32 -- Fizzle. Late breakdown. Null looks okay. Next shot: reduce pre-fill puff from 20 to 17 ms. Change J-bottom plenum back to deuterium, at 20 psi. Add 2 ms back to the argon puff (requested by John Rice)
Jun 18 1997 04:49:33:620PM	970618033	Robert Granetz	Shot 33 -- Fizzle. Too much Br Next shot: reduce Br offset from .0075 to .007
Jun 18 1997 04:59:27:820PM	970618034	Robert Granetz	Shot 34 -- Plasma. Good shot. Terminates at 1.68 s. Prf>1 MW. Looks like there was some dithering during the RF pulse. Next shot: no changes.
Jun 18 1997 05:16:48:520PM	970618035	Robert Granetz	Shot 35 -- Dud! End of run.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:43:30:850AM	Test	Ok
2	09:02:55:000AM	Plasma	Ok	o2l comm fault caused by P disruption
3	09:23:57:710AM	Plasma	Ok
4	09:41:41:400AM	Plasma	Ok
5	09:50:05:980AM	Plasma	Ok
6	09:58:12:360AM	Test	Ok
7	10:06:03:460AM	Test	Ok
8	10:43:52:840AM	Test	Ok
9	11:48:50:850AM	Test	Ok
10	12:04:36:060PM	Plasma	Ok
11	12:14:35:610PM	Plasma	Ok
12	12:22:06:830PM	Plasma	Ok
13	12:34:02:360PM	Plasma	Ok
14	12:45:19:140PM	Plasma	Ok
15	12:57:11:420PM	Plasma	Ok
16	01:08:52:170PM	Plasma	Ok
17	01:26:06:820PM	Plasma	Ok
18	01:32:58:270PM	Plasma	Ok
19	01:44:11:980PM	Plasma	Ok
20	01:53:55:320PM	Plasma	Ok
21	02:27:11:210PM	Plasma	Ok
22	02:40:20:020PM	Plasma	Ok
23	02:54:57:100PM	Plasma	Ok
24	03:04:41:760PM	Plasma	Ok
25	03:13:40:460PM	Plasma	Ok
26	03:27:14:700PM	Plasma	Ok
27	03:52:30:040PM	Plasma	Ok
28	03:59:37:330PM	Plasma	Ok
29	04:08:20:360PM	Plasma	Ok
30	04:15:19:940PM	Plasma	Ok
31	04:22:33:110PM	Plasma	Ok
32	04:34:48:270PM	Plasma	Ok
33	04:44:53:450PM	Plasma	Ok
34	04:51:43:920PM	Plasma	Ok
35	05:00:36:010PM	Plasma	Ok