Alcator C-Mod Run 930924 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: John Goetz (shots 1-31)

Operators
Session leader(s):	John Goetz
Physics operator(s):	Ian Hutchinson
Engineering operator(s):	Vinny Bertolino

Engineering Operator Run Comment
RF conditioning --D2

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:08:993PM

Author: To Be Determined

Physics operator and Session leader summary for 930924

EO: Bertolino
PO: Hutchinson
SL: Goetz

The goal of Run 930924 was to obtain reliable breakdowns with deuterium fill
and fueling gas. The plan for the day was to once again explore breakdown
space, i.e., obtain a good field null, determine the correct fill pressure
and fueling pulse, and get an acceptable current rise.

The run started with a reload of shot 930923018 which had fueling programming
acceptable for a hydrogen plasma. The first shot was a test shot to determine
the difference in fueling time for a deuterium pulse. The deuterium pulse
takes from 5 - 10 msec longer than hydrogen to register at the gauge. The
first six shots were used to determine the correct time to start the fueling
pulse and the correct magnitude of the pulse. Shots with hard x-rays and
density disruptions occured but by shot 009 a good gas pulse was obtained.

The field nulls obtained throughout the day were good, if not very good.
The commutation resistors for the EF1's were increased to 100 mOhm and the
V_EF1's and V_OH2U were tweaked just after commutation to try and remove the
curvature from the vacuum fields. The radial field drifted somewhat during
the run and small tweaks to the Br_0 controller were needed, although never
more than 0.5 mT was needed. The ramp rate of the vertical field was adjusted
throughout the run using the OH1 and EF3 voltages. A linear ramp of Bz was
achieved by the end of the run and a current rise without a hesitation
followed.

Radial position control was achieved by moving the switch-on time of the
RCUR controller to .02 sec and turning up the PID and M gains. Vertical
position control was much better during this run. The chopper was removed
from ZCUR(2) and the gains for ZCUR(3) were increased. Also a new predictor
for ZCUR(3) was calculated using FILAMENT/nocoils.

The plasmas produced throughout the run were rather dirty with copious amounts
of molybdenum. Many of the fizzles had acceptable field structure and had
'burn-out' on the z-meter diagnostic. Disruptions also plagued the run and
an upcoming run may shed some light on to the post-disruption fizzle blues
puzzle. As usual it is difficult to determine if fields, fill, or some other
condition is limiting the operational space for a good breakdown.

Engineering troubles today: Feedback on the plasma current causes trouble
with the OH1 and EF4 power supplies during fizzles. The dead-time has been
adjusted to save these supplies from shoot-through. This adjustment causes
a longer dead-time which leads to a dimple in the plasma current (until OH1
has current again).

Scorecard: 30 shots = 16 plasmas + 13 fizzles + 1 test

Shot summary for 930924
Reload of 930923018

Changes:
PULSE_GAS_3 waveform doing all the fueling
put CLEAR_IN on Wire 6

1 test shot for deuterium fuel delay test
2 P_0=1.2e-5 move PULSE_GAS_3 5 msec earlier fizzle
3 move PULSE_GAS_3 3 msec later fizzle
4 move PULSE_GAS_3 3 msec later plasma
5 lower PULSE_GAS_3 starting at 40 msec plasma
6 raise gas @ 0; lower after .1 chopper removed from wire 2
M gain of chopper on wire 3 doubled to comp. plasma
7 move PULSE_GAS_3 2 msec earlier; lower V_OH2U to 25V @ .001
and .003 (was 35); chopper D now 6 plasma
8 V_OH2U -25V@.4 & -30@.7 (help EFC bias) lower gas @.25 on plasma
9 lower early fueling gas raise EF1 comm. resistance to .1 Ohm plasma
10 V_EF3 to -2800 @ -.001 D_RCUR to 2 fizzle
11 V_EF3 back to -3000 V_OH1 to -180V @ .005 D_ZCUR(3)=4 plasma
12 turn on RCUR @ .02 turn off D_ZCUR(3) from.7 to .8
increase fueling from .3 to .6 plasma
13 P_RCUR=4 D_RCUR=4 dropout on ZCUR(2) and ZCUR(3) from .75 to .76
raise fuel @ .2 and lower after .5 plasma
14 P_RCUR=6 D_RCUR=6 raise fuel after .5 fizzle
15 V_OH1 to -185V @ .005 IC_EF4 @ -1000 @ .35 fizzle
16 P_0 = 1.1e-5 fizzle
17 P_0=1.2e-5 V_EF3 to -2900 @ -.001 fizzle
18 V_EF3 to -2800 @ -.001 offset on Br_0 now .0095 fizzle
19 delay PULSE_GAS_3 by .002 V_EF1's to -150V @ .002 fizzle
20 V_OH1 to -150V @ .024 plasma
21 lower fuel after .5 fizzle
22 V_OH1 -175 @ .005 & -160 @ .024 offset on Br_0 = +.009 plasma
23 M_RCUR gains all inc. by 1/3 remove EFC_current from
predictor on wire 3 plasma
24 gas to 35V @ .07 & .11 recalculate Wire 3 - filament/nocoils plasma
25 PULSE_GAS_2 50V from .4 to .425 remove 300A from EF1U and
add 250A to EF2U after .2 plasma
26 PULSE_GAS_2 = 60V more PULSE_GAS_3 @ .2 D_ZCUR(3)=9. fizzle
27 offset on Br_0 = .0085 plasma
28 100V spike on PULSE_GAS_2 V_OH1 -165 @ .005 & -170 @ .024
raise M_ZCUR(2) 8x lower P_ZCUR to 2 fizzle
29 no RF fizzle
30 P_0=1.0e-5 V_OH1 -170 @ .005 plasma

Physics Operator Summaries

Session Leader Comments

Sep 24 1993 08:30:53:930AM John Goetz Run 930924

Today's run is dedicated to obtaining reliable breakdown using
deuterium fill and fueling gas.
Secondary goals include further evaluation of the R_XL and Z_XL
controllers, installation of CLEAR_IN and CLEAR_OUT predictors and
evaluation of their controllers, and tuning and conditioning of the
RF antenna in anticipation of Run 930928.

Sep 24 1993 09:01:12:960AM 930924001 John Goetz Shot 001
Test shot to determine deuterium fueling delay time
(to be compared with Shot 930923014 - a dud)

For Shot 002:
Move gas programming 5 msec earlier and fire away

Sep 24 1993 09:20:22:310AM 930924002 John Goetz Shot 002
Fizzle
Burn-out on z-meter trace
Density 1e19 (Nel) - usually 5e18

For Shot 003:
Move gas programming 3 msec later and try again

Sep 24 1993 09:37:31:970AM 930924003 John Goetz Shot 003
Fizzle
Burn-out on z-meter trace
Density 1e19 (Nel) - usually 5e18

For Shot 004:
Move gas programming 3 msec later and try again

Sep 24 1993 09:54:00:930AM 930924004 John Goetz Shot 004
Plasma
over-gasssed beginning at 40 msec
density disruptions the whole way - VDE @ .370

For Shot 005:
Lower gas programming starting at +.04 until .25

Sep 24 1993 10:17:41:420AM 930924005 John Goetz Shot 005
Plasma
density disruptions the whole way - VDE @ .820
hards until .233

For Shot 006:
Raise gas programming at 0 until .05; lower from .1
Remove chopper from Wire 2; up the M on wire 3 to make the
change transparent
Enable RF

Sep 24 1993 10:31:55:460AM 930924006 John Goetz Shot 006
Plasma - 47kA
VDE @ .820
still some hards early

For Shot 007:
Move gas programming 2 msec earlier
Up chopper D gain to 6.
lower V_OH2U to 25v @ .001 and .003 (was 35) try and smooth
out radial field after commutation
Enable RF

Sep 24 1993 10:49:18:970AM 930924007 John Goetz Shot 007
Plasma - 440kA
VDE @ .690
hards gone due to gas programming
high density - shark fin @.33
oscillations gone from ZCUR
fields look much better at current rampup

For Shot 008:
lower gas programming from .25 sec on
lower V_OH2U to -25v @ .4 and -35V @ .7 (help with EFC bias)
Enable argon puff

Sep 24 1993 11:07:47:010AM 930924008 John Goetz Shot 008
Plasma - 440kA
VDE @ .42
density 8e19 -nel- sudden drop @ .34

For Shot 009:
lower gas programming @.1 (to 25V)
raise EF1 commutation resistor to .1Ohm (slow down Bz ramp)

Sep 24 1993 11:32:02:680AM 930924009 John Goetz Shot 009
Plasma - 470kA - no disruption - successful rampdown
dirty plasma
R oscillations early
45 kW RF

For Shot 010:
V_EF3 to -2800 @ -.001 (slow vertical field ramp)
D_RCUR to 2 (stop RCUR oscillations)

Sep 24 1993 11:50:17:920AM 930924010 John Goetz Shot 010
Fizzle
Bz ramp rate too slow?

For Shot 011:
V_EF3 to -3000 @ -.001
V_OH1 to -180V @ .005 (was -200) (faster Bz ramp rate)
D_ZCUR(3) to 4.

Sep 24 1993 12:07:52:380PM 930924011 John Goetz Shot 011
Plasma
good current rise
natural injection @ .6

For Shot 012:
D_ZCUR(3) off from .7 to .8
turn on RCUR @ .02
up gas from .3 to .6

Sep 24 1993 12:26:11:710PM 930924012 John Goetz Shot 012
Plasma
good current rise
still shaking in major radius

For Shot 013:
P_RCUR = 4. & D_RCUR = 4.
add dropout to gains of ZCUR(2) & ZCUR(3) from .75 to .76
raise PULSE_GAS_3 @ .2; lower after .5
more Ar
Ti injection @ .5 for calibration purposes

Sep 24 1993 12:41:14:770PM 930924013 John Goetz Shot 013
Plasma - VDE @ .65 - shark fin @ .5 (a big 'un)
good current rise
still shaking in major radius although smaller in amplitude

For Shot 014:
P_RCUR = 6. & D_RCUR = 6.
raise PULSE_GAS_3 after .5

Sep 24 1993 12:58:21:270PM 930924014 John Goetz Shot 014
Fizzle - should have gone

For Shot 015:
V_OH1 to -185V @ .005 (was -180) slow Bz ramp just a bit
IC_EF4 @ -1000 @ .35 (was .3) help power supply out of single-phase

Sep 24 1993 01:08:25:500PM 930924015 John Goetz Shot 015
Fizzle - should have gone - fields o.k.

For Shot 016:
P_0 = 1.1e-5

Sep 24 1993 01:30:21:070PM 930924016 John Goetz Shot 016
Fizzle - should have gone - fields o.k.

For Shot 017:
P_0 = 1.2e-5
V_EF3 to -2900 @ -.001 (slow down Bz ramp)

Sep 24 1993 01:44:51:830PM 930924017 John Goetz Shot 017
Fizzle - should have gone

For Shot 018:
V_EF3 to -2800 @ -.001 (slow down Bz ramp)
offset on Br_0 now at +.0095

Sep 24 1993 02:02:40:020PM 930924018 John Goetz Shot 018
Fizzle - should have gone - fields very good

For Shot 019:
delay PULSE_GAS_3 by .002
V_EF1's to -150V @ .002

Sep 24 1993 02:18:21:200PM 930924019 John Goetz Shot 019
Fizzle - should have gone - fields very good
dies on inboard wall @ .018

For Shot 020:
V_OH1 to -150V @ .024 (was -70) slow down Bz ramp after .01

Sep 24 1993 02:32:08:590PM 930924020 John Goetz Shot 020
Plasma - 470kA - VDE @ .72
shark fin @ .65 - density rising - current falling
current ramp slower - Bz ramp has less change of slope @ .01

For Shot 021:
no changes

Sep 24 1993 02:48:52:250PM 930924021 John Goetz Shot 021
Fizzle - Br a little positive

For Shot 022:
V_OH1 -175 @ .005 & -160 @ .024 (smooth out Bz ramp)
offset on Br_0 now +.009

Sep 24 1993 03:11:26:080PM 930924022 John Goetz Shot 022
Plasma - 470kA successful rampdown
a few hards throughout
smooth Bz ramp
RCUR oscillation reduced
data obtained for ZCUR studies

For Shot 023:
M_RCUR factors all increased by 1/3
zeroed EFC_current contribution to predictor on wire 3

Sep 24 1993 03:29:15:110PM 930924023 John Goetz Shot 023
Plasma - 470kA VDE @ .62
current ramp fine - linear Bz ramp
shark fin @ .48 - shark fin disruption @ .55
RF power stepped from 80 to 120 kW

For Shot 024:
recalculate predictor on wire 3 - filament/nocoils predictor
raise fuel gas to 35V @ .07 & .11

Sep 24 1993 03:45:47:930PM 930924024 John Goetz Shot 024
Plasma - 480kA - successful rampdown
current ramp fine - linear Bz ramp
RF turned on at .5 - moly injected - > 150kW

For Shot 025:
PULSE_GAS_2 50V from .4 to .425 (H2 minority)
remove 300A from EF1U and add 250A to EF2U for shaping from .2 on

Sep 24 1993 03:59:08:820PM 930924025 John Goetz Shot 025
Plasma - 480kA - VDE @ .78
RF on @ .5 - lots of moly - 150kW average - 200 kW peak

For Shot 026:
PULSE_GAS_2 60V from .4 to .425 (H2 minority)
raised D_ZCUR(3) to 9.
more PULSE_GAS_3 @ .2

Sep 24 1993 04:09:50:310PM 930924026 John Goetz Shot 026
Fizzle - fields look o.k. - Br too pos?

For Shot 027:
offset on Br_0 now .0085

Sep 24 1993 04:36:10:450PM 930924027 John Goetz Shot 027
Plasma - VDE @ .575
hesitation in the current rise
hards the whole way

For Shot 028:
100V spike on PULSE_GAS_2
V_OH1 to -165 @ .005 & -170 @ .024 (help current rise)
raise all M_ZCUR(2) gains by factor of 8
lower P_ZCUR(2) to 2.

Sep 24 1993 04:49:35:090PM 930924028 John Goetz Shot 028
Fizzle - fields o.k.

For Shot 029:
no RF

Sep 24 1993 04:57:16:490PM 930924029 John Goetz Shot 029
Fizzle - fields o.k.

For Shot 030:
V_OH1 to -170 @ .005
P_0 = 1.0e-5

Sep 24 1993 05:15:23:630PM 930924030 John Goetz Shot 030
plasma - successful rampdown - slight current rise hesitation
shark fin at the end

Sep 27 1993 01:57:14:620PM 930924031 Tom Luke This is part of a series of shots performed on 930927 in order to
test the efficiency of the gas puffing system. The test were
performed b Artur Niemczewski and Thomas Luke using the ratiomatic
gas gauge. By pulsing the gas system and measuing the change in
pressure on the gauge, we will hopefully be able to determine the number
of particle being put in the machine per puff. Shot 31 was the first shot
The puff was 50 ms long and 60V high. The base pressure is 1.-e-5 torr.

Physics Operator Comments

Engineering Operator Comments

Shot Time Type Status Comment

1 08:45:28:780AM Test Ok test of the pulsed gas with D2

2 09:01:14:430AM Plasma Bad ef4 single phased through zero

3 09:22:03:310AM Plasma Ok no faults

4 09:38:04:710AM Plasma Ok no faults

5 09:55:47:080AM Plasma Ok no faults

6 10:14:19:200AM Plasma Ok no faults

7 10:31:57:360AM Plasma Ok no faults

8 10:48:50:030AM Plasma Ok no faults

9 11:15:05:170AM Plasma Ok no faults

10 11:32:31:140AM Plasma Ok ef4 single phasing through zero

11 11:49:57:250AM Plasma Ok no faults

12 12:05:47:040PM Plasma Ok no faults

13 12:26:07:020PM Plasma Ok no faults

14 12:42:33:690PM Plasma Ok ef4 single phasing through zero

15 12:58:53:730PM Plasma Ok ef4 single phasing thru zero

16 01:15:05:980PM Plasma Ok no faults

17 01:31:17:950PM Plasma Ok ef4 single phased through zero

18 01:46:50:690PM Plasma Ok ef4 single phased through zero

19 02:04:03:890PM Plasma Ok ef4 single phased through zero

20 02:19:14:380PM Plasma Ok no faults

21 02:35:50:700PM Plasma Ok no faults

22 02:54:14:960PM Plasma Ok no faults

23 03:11:19:560PM Plasma Ok no faults

24 03:29:26:800PM Plasma Ok no faults

25 03:45:17:410PM Plasma Ok no faults

26 04:00:18:970PM Plasma Ok ef4 single phased through zero

27 04:18:29:180PM Plasma Ok no faults

28 04:37:31:510PM Plasma Ok no faults

29 04:50:21:630PM Plasma Ok no faults

30 05:04:39:220PM Plasma Ok no faults

31 01:44:33:730PM Test Bad

Session Leader Comments
Sep 24 1993 08:30:53:930AM		John Goetz	Run 930924 Today's run is dedicated to obtaining reliable breakdown using deuterium fill and fueling gas. Secondary goals include further evaluation of the R_XL and Z_XL controllers, installation of CLEAR_IN and CLEAR_OUT predictors and evaluation of their controllers, and tuning and conditioning of the RF antenna in anticipation of Run 930928.
Sep 24 1993 09:01:12:960AM	930924001	John Goetz	Shot 001 Test shot to determine deuterium fueling delay time (to be compared with Shot 930923014 - a dud) For Shot 002: Move gas programming 5 msec earlier and fire away
Sep 24 1993 09:20:22:310AM	930924002	John Goetz	Shot 002 Fizzle Burn-out on z-meter trace Density 1e19 (Nel) - usually 5e18 For Shot 003: Move gas programming 3 msec later and try again
Sep 24 1993 09:37:31:970AM	930924003	John Goetz	Shot 003 Fizzle Burn-out on z-meter trace Density 1e19 (Nel) - usually 5e18 For Shot 004: Move gas programming 3 msec later and try again
Sep 24 1993 09:54:00:930AM	930924004	John Goetz	Shot 004 Plasma over-gasssed beginning at 40 msec density disruptions the whole way - VDE @ .370 For Shot 005: Lower gas programming starting at +.04 until .25
Sep 24 1993 10:17:41:420AM	930924005	John Goetz	Shot 005 Plasma density disruptions the whole way - VDE @ .820 hards until .233 For Shot 006: Raise gas programming at 0 until .05; lower from .1 Remove chopper from Wire 2; up the M on wire 3 to make the change transparent Enable RF
Sep 24 1993 10:31:55:460AM	930924006	John Goetz	Shot 006 Plasma - 47kA VDE @ .820 still some hards early For Shot 007: Move gas programming 2 msec earlier Up chopper D gain to 6. lower V_OH2U to 25v @ .001 and .003 (was 35) try and smooth out radial field after commutation Enable RF
Sep 24 1993 10:49:18:970AM	930924007	John Goetz	Shot 007 Plasma - 440kA VDE @ .690 hards gone due to gas programming high density - shark fin @.33 oscillations gone from ZCUR fields look much better at current rampup For Shot 008: lower gas programming from .25 sec on lower V_OH2U to -25v @ .4 and -35V @ .7 (help with EFC bias) Enable argon puff
Sep 24 1993 11:07:47:010AM	930924008	John Goetz	Shot 008 Plasma - 440kA VDE @ .42 density 8e19 -nel- sudden drop @ .34 For Shot 009: lower gas programming @.1 (to 25V) raise EF1 commutation resistor to .1Ohm (slow down Bz ramp)
Sep 24 1993 11:32:02:680AM	930924009	John Goetz	Shot 009 Plasma - 470kA - no disruption - successful rampdown dirty plasma R oscillations early 45 kW RF For Shot 010: V_EF3 to -2800 @ -.001 (slow vertical field ramp) D_RCUR to 2 (stop RCUR oscillations)
Sep 24 1993 11:50:17:920AM	930924010	John Goetz	Shot 010 Fizzle Bz ramp rate too slow? For Shot 011: V_EF3 to -3000 @ -.001 V_OH1 to -180V @ .005 (was -200) (faster Bz ramp rate) D_ZCUR(3) to 4.
Sep 24 1993 12:07:52:380PM	930924011	John Goetz	Shot 011 Plasma good current rise natural injection @ .6 For Shot 012: D_ZCUR(3) off from .7 to .8 turn on RCUR @ .02 up gas from .3 to .6
Sep 24 1993 12:26:11:710PM	930924012	John Goetz	Shot 012 Plasma good current rise still shaking in major radius For Shot 013: P_RCUR = 4. & D_RCUR = 4. add dropout to gains of ZCUR(2) & ZCUR(3) from .75 to .76 raise PULSE_GAS_3 @ .2; lower after .5 more Ar Ti injection @ .5 for calibration purposes
Sep 24 1993 12:41:14:770PM	930924013	John Goetz	Shot 013 Plasma - VDE @ .65 - shark fin @ .5 (a big 'un) good current rise still shaking in major radius although smaller in amplitude For Shot 014: P_RCUR = 6. & D_RCUR = 6. raise PULSE_GAS_3 after .5
Sep 24 1993 12:58:21:270PM	930924014	John Goetz	Shot 014 Fizzle - should have gone For Shot 015: V_OH1 to -185V @ .005 (was -180) slow Bz ramp just a bit IC_EF4 @ -1000 @ .35 (was .3) help power supply out of single-phase
Sep 24 1993 01:08:25:500PM	930924015	John Goetz	Shot 015 Fizzle - should have gone - fields o.k. For Shot 016: P_0 = 1.1e-5
Sep 24 1993 01:30:21:070PM	930924016	John Goetz	Shot 016 Fizzle - should have gone - fields o.k. For Shot 017: P_0 = 1.2e-5 V_EF3 to -2900 @ -.001 (slow down Bz ramp)
Sep 24 1993 01:44:51:830PM	930924017	John Goetz	Shot 017 Fizzle - should have gone For Shot 018: V_EF3 to -2800 @ -.001 (slow down Bz ramp) offset on Br_0 now at +.0095
Sep 24 1993 02:02:40:020PM	930924018	John Goetz	Shot 018 Fizzle - should have gone - fields very good For Shot 019: delay PULSE_GAS_3 by .002 V_EF1's to -150V @ .002
Sep 24 1993 02:18:21:200PM	930924019	John Goetz	Shot 019 Fizzle - should have gone - fields very good dies on inboard wall @ .018 For Shot 020: V_OH1 to -150V @ .024 (was -70) slow down Bz ramp after .01
Sep 24 1993 02:32:08:590PM	930924020	John Goetz	Shot 020 Plasma - 470kA - VDE @ .72 shark fin @ .65 - density rising - current falling current ramp slower - Bz ramp has less change of slope @ .01 For Shot 021: no changes
Sep 24 1993 02:48:52:250PM	930924021	John Goetz	Shot 021 Fizzle - Br a little positive For Shot 022: V_OH1 -175 @ .005 & -160 @ .024 (smooth out Bz ramp) offset on Br_0 now +.009
Sep 24 1993 03:11:26:080PM	930924022	John Goetz	Shot 022 Plasma - 470kA successful rampdown a few hards throughout smooth Bz ramp RCUR oscillation reduced data obtained for ZCUR studies For Shot 023: M_RCUR factors all increased by 1/3 zeroed EFC_current contribution to predictor on wire 3
Sep 24 1993 03:29:15:110PM	930924023	John Goetz	Shot 023 Plasma - 470kA VDE @ .62 current ramp fine - linear Bz ramp shark fin @ .48 - shark fin disruption @ .55 RF power stepped from 80 to 120 kW For Shot 024: recalculate predictor on wire 3 - filament/nocoils predictor raise fuel gas to 35V @ .07 & .11
Sep 24 1993 03:45:47:930PM	930924024	John Goetz	Shot 024 Plasma - 480kA - successful rampdown current ramp fine - linear Bz ramp RF turned on at .5 - moly injected - > 150kW For Shot 025: PULSE_GAS_2 50V from .4 to .425 (H2 minority) remove 300A from EF1U and add 250A to EF2U for shaping from .2 on
Sep 24 1993 03:59:08:820PM	930924025	John Goetz	Shot 025 Plasma - 480kA - VDE @ .78 RF on @ .5 - lots of moly - 150kW average - 200 kW peak For Shot 026: PULSE_GAS_2 60V from .4 to .425 (H2 minority) raised D_ZCUR(3) to 9. more PULSE_GAS_3 @ .2
Sep 24 1993 04:09:50:310PM	930924026	John Goetz	Shot 026 Fizzle - fields look o.k. - Br too pos? For Shot 027: offset on Br_0 now .0085
Sep 24 1993 04:36:10:450PM	930924027	John Goetz	Shot 027 Plasma - VDE @ .575 hesitation in the current rise hards the whole way For Shot 028: 100V spike on PULSE_GAS_2 V_OH1 to -165 @ .005 & -170 @ .024 (help current rise) raise all M_ZCUR(2) gains by factor of 8 lower P_ZCUR(2) to 2.
Sep 24 1993 04:49:35:090PM	930924028	John Goetz	Shot 028 Fizzle - fields o.k. For Shot 029: no RF
Sep 24 1993 04:57:16:490PM	930924029	John Goetz	Shot 029 Fizzle - fields o.k. For Shot 030: V_OH1 to -170 @ .005 P_0 = 1.0e-5
Sep 24 1993 05:15:23:630PM	930924030	John Goetz	Shot 030 plasma - successful rampdown - slight current rise hesitation shark fin at the end
Sep 27 1993 01:57:14:620PM	930924031	Tom Luke	This is part of a series of shots performed on 930927 in order to test the efficiency of the gas puffing system. The test were performed b Artur Niemczewski and Thomas Luke using the ratiomatic gas gauge. By pulsing the gas system and measuing the change in pressure on the gauge, we will hopefully be able to determine the number of particle being put in the machine per puff. Shot 31 was the first shot The puff was 50 ms long and 60V high. The base pressure is 1.-e-5 torr.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:45:28:780AM	Test	Ok	test of the pulsed gas with D2
2	09:01:14:430AM	Plasma	Bad	ef4 single phased through zero
3	09:22:03:310AM	Plasma	Ok	no faults
4	09:38:04:710AM	Plasma	Ok	no faults
5	09:55:47:080AM	Plasma	Ok	no faults
6	10:14:19:200AM	Plasma	Ok	no faults
7	10:31:57:360AM	Plasma	Ok	no faults
8	10:48:50:030AM	Plasma	Ok	no faults
9	11:15:05:170AM	Plasma	Ok	no faults
10	11:32:31:140AM	Plasma	Ok	ef4 single phasing through zero
11	11:49:57:250AM	Plasma	Ok	no faults
12	12:05:47:040PM	Plasma	Ok	no faults
13	12:26:07:020PM	Plasma	Ok	no faults
14	12:42:33:690PM	Plasma	Ok	ef4 single phasing through zero
15	12:58:53:730PM	Plasma	Ok	ef4 single phasing thru zero
16	01:15:05:980PM	Plasma	Ok	no faults
17	01:31:17:950PM	Plasma	Ok	ef4 single phased through zero
18	01:46:50:690PM	Plasma	Ok	ef4 single phased through zero
19	02:04:03:890PM	Plasma	Ok	ef4 single phased through zero
20	02:19:14:380PM	Plasma	Ok	no faults
21	02:35:50:700PM	Plasma	Ok	no faults
22	02:54:14:960PM	Plasma	Ok	no faults
23	03:11:19:560PM	Plasma	Ok	no faults
24	03:29:26:800PM	Plasma	Ok	no faults
25	03:45:17:410PM	Plasma	Ok	no faults
26	04:00:18:970PM	Plasma	Ok	ef4 single phased through zero
27	04:18:29:180PM	Plasma	Ok	no faults
28	04:37:31:510PM	Plasma	Ok	no faults
29	04:50:21:630PM	Plasma	Ok	no faults
30	05:04:39:220PM	Plasma	Ok	no faults
31	01:44:33:730PM	Test	Bad