Alcator C-Mod Run 1040107 Information

Miniproposals

Miniproposal: 355

Date Filed: 11/12/2003

Title: ICRF Testing & Conditioning

First Author: Steve Wukitch

Session Leader: Steve Wukitch (shots 1-14)

Miniproposal: 376

Date Filed: 11/25/2003

Title: Study of the Efficiency of ICRF Minority Heating and Investigation of the Cause of Low H-mode Plasma

First Author: Yijun Lin

Session Leader: Yijun Lin (shots 15-31)

Operators
Session leader(s):	Steve Wukitch,Yijun Lin
Physics operator(s):	Jim Irby
Engineering operator(s):	Gary Dekow,Bill Parkin,Bill Byford

Engineering Operator Run Comment
Boronization Recovery, ICRF Conditioning (MP355), and Performance/Effici

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:01:633PM

Author: Yijun Lin

Engineering setup for Wednesday, 07 Jan 2004

Boronization Recovery, ICRF Conditioning (MP355), and
Performance/Efficiency (MP376)

Session leader: Wukitch/Lin
Physics operator: Irby

The machine will be boronized overnight: dP 120 psi, on/off 0.75/0.25
Follow boronization by ECDC in helium until 07:00

Run begins at 09:00 and ends at 17:00.

Power systems the same as on last shot from run 1040106 (sln fiducial)

A-coils should be hooked up as on 1031204037 (+Dtop -Dbot -Jtop +Jbot), and
the power supply should be enabled.

Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill C-side with 30 psi D2 Hybrid enabled (PG3)

Enable the following gate valves: ECE, VUV, DNB
----------------------------------------------------------------------

run plan:

Condition antennas to 1.25 MW into H-mode using fiducial discharges

----------------------------------------------------------------------
Summary:

Conditioning was fairly quick up to 1.25 MW into H-mode discharges.
The downside is that FMIT#1 had a non-recoverable xbar after 029. We
also investigated early faulting and have noticed that on high
performing discharges one of the antennas will fault between 100-150
msec and often be fault free for the remainder of the shot. No clear
cause for the fault has been identified yet.
----------------------------------------------------------------------

001-3 data system tests
004 Fiducial shot. 1 MA. 5.4 T, nl04 = 1.e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF step up 1, 2, 3, 4 MW.

Result: J ant mismatched.
D many faults.
E clean.
Next: tune antennas and repeat.

005 5.4 T, 1 MA, nl04~1, fiducial (K~1.6, gap~0.8 cm, l_tri~0.56, u_tri~.29)
D: 0.25, 0.5, 0.75, 1, 1.25 MW [0.6,1.5] sec
E: 0.25, 0.5, 0.75, 1, 1.25 MW [0.6,1.5] sec
J: 0.5, 1., 1.5, 2, 2.5 MW [0.6,1.5] sec
Result: plasma H-mode
D and E ran fine at 1.1 MW level.
J ran well up to 2 MW
Next: Ramp-up rf power. D and E 0.8-1.2 MW, J 1.2-2.2 MW

006 5.4 T, 1 MA, nl04~0.9, fiducial
D: 0.8-1.2 MW ramp [0.6,1.5] sec
E: 0.8-1.2 MW ramp [0.6,1.5] sec
J: 1.2-2.2 MW ramp [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: max faults >1.6 MW
007 5.4 T, 1 MA, nl04~1, fiducial
D: 0.8-1.2 MW ramp [0.6,1.5] sec
E: 0.8-1.2 MW ramp [0.6,1.5] sec
J: 1.2-2.2 MW ramp [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: max faults >1.6 MW
dig_phase set to 100 from 140
FMIT#1 crowbarred after the shot and will be out of commission for a couple of shots

008 5.4 T, 1 MA, nl04~1, fiducial
D: 0
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW ramp [0.6,1.5] sec
result: plasma H-mode
E: ran 1 fault
J: ran 8 faults sparkles in front of J
lots of sparkles in front of J-port on wide2

repaired FMIT#1 screen xbar - replaced scr008 5.4 T, 1 MA, nl04~1, fiducial
009 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran 1 fault
J: ran 8 faults
dig_phase set to 60 from 100 deg
010 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 1 fault
E: ran 2 faults
J: ran 4 faults
dig_phase set to 60 from 90 deg
011 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode - ~200 kJ for ~4.8
D: ran 3 faults
E: ran 1 fault
J: ran 2 faults injection from J-port before fault
dig_phase set to 90 from 110 deg

waited to save data

012 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.4 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 2 faults xbarred at 1 sec
E: ran 1 fault
J: ran screen overload early
dig_phase set to 110 from 130 deg - phase in now correct
013 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 7 faults
E: ran
J: ran 2 faults
014 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 3 faults
E: ran
J: ran 1 faults
015 5.4 T, 1 MA, nl04~0.8, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 1 fault
E: ran 1 fault
J: ran
016 5.4 T, 1 MA, nl04~0.8
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 1 fault
E: ran 1 fault
J: ran
017 5.4 T, 1 MA, nl04~0.8
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 2 faults
E: ran 2 faults
J: ran 2 faults
018 NTP
019 5.4 T, 1 MA, nl04~1.0
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 7 faults
E: ran
J: ran 2 faults
020 5.4 T, 1 MA, nl04~1.2
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 6 faults
E: ran 1 fault
J: ran
021 NTP
022 5.4 T, 1 MA, nl04~0.7
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 1 fault
E: ran
J: ran
023 5.4 T, 1 MA, nl04~0.7
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran 1 fault
J: ran 1 fault
024 5.4 T, 1 MA, no feedback
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran 2 faults
J: ran 1 fault
025 5.4 T, 1 MA, no feedback
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran 1 fault
J: ran 4 fault
026 5.4 T, 1 MA, nl04~0.6
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: ran 6 faults
027 5.4 T, 1 MA, nl04~0.6
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: ran
028 5.4 T, 1 MA, nl04~0.75
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: ran
029 5.4 T, 1 MA, nl04~0.75
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: ran 2 early faults
031 5.4 T, 1 MA, nl04~0.75
D: off
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
E: ran
J: ran

Entered: Jul 7 2004 03:49:01:837PM

Author: Yijun Lin

MP 376, performance evaluation (2nd try)

Plasma performance is slightly above the level we obtained in
run 1031205, 1031209 and 1031210. The best shot, shot 22, we got
max stored energy of 210 kJ (1 MA) with 4.5 MW rf. The performance
was progressively better along with lower neutral pressure. However,
after several no-gas puff shots (24, 25), the impurity level was up.
As a result, we could not achieve the same performance as 22
late in the run-day (26, 27, 28, 29). The stored energy
seemed to be sensitive to the target density: higher density,
the H-mode is more EDA like, and the total stored energy is generally
lower.

However, I still don't know the magic knob yet. We did some
low density shots to unload the wall before the boronization,
the boronization was done with 120 PSI and ECDC in Helium (instead
of Deuterium).

There were definitely fewer antenna faults at lower neutral pressure.

FMIT #1 was done during shot 29 (after the rf pulse). It is
still under investigation.

Physics Operator Summaries

Entered: Jul 7 2004 04:36:48:380PM

Author: Jim Irby

Engineering setup for Wednesday, 07 Jan 2004

Boronization Recovery, ICRF Conditioning (MP355), and
Performance/Efficiency (MP376)

EO: Dekow, Byford, Parkin
SL: Wukitch/Lin
PO: Irby

The machine will be boronized overnight: dP 120 psi, on/off 0.75/0.25
Follow boronization by ECDC in helium until 07:00

Run begins at 09:00 and ends at 17:00.

Power systems the same as on last shot from run 1040106 (sln fiducial)

A-coils should be hooked up as on 1031204037 (+Dtop -Dbot -Jtop +Jbot), and
the power supply should be enabled.

Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill C-side with 30 psi D2 Hybrid enabled (PG3)

Enable the following gate valves: ECE, VUV, DNB

Summary
-------

The machine was boronized overnight before this run. 120 psi of
diborane was used, followed by 3 hours of helium ecdc. 15 minutes of
ecdc in D2 followed the helium ecdc.

We started off with a cycle test and found data system problems. The
first plasma attempt was shot 4, which produced plasma into rampdown.
This shot was followed by several nice shots with progressively more
rf power. The h/(h+d), Zave, and radiated power were all much
improved over shot 1040106033, the fiducial shot from yesterday,
before boronization. We had several shots with stored energy above
200 kJ today, but with 5 MW of rf required (211 kJ on shot 22 for
example).

Problems
--------

Data system problems before run. Lost bypass cap on FMIT1 FPA. Will
require a couple of days to fix.

Score
-----

duds
fizzles 18,21,30
plasmas 04,05,06,07,08,09,10,11,12,13,14,15,16,17,19,20,22,23,24,25,
26,27,28,29,31

tests 01,02,03

Session Leader Comments

Jan 7 2004 09:47:43:933AM 1040107003 Yijun Lin Shot 1 - 3 were data system test shots. No plasma.

Jan 7 2004 09:55:38:080AM 1040107004 Yijun Lin shot 04
Load 1040106033
Fiducial shot. 1 MA. 5.4 T, nl04 = 1.e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF step up 1, 2, 3, 4 MW.

Result: J ant mismatched.
D many faults.
E clean.
Next: tune antennas and repeat.

Jan 7 2004 10:16:51:353AM 1040107005 Yijun Lin shot 05
1 MA. 5.4 T, nl04 = 1.e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF step up 1, 2, 3, 4 MW.

Result: plasma H-mode
D and E ran fine at 1.1 MW level.
J ran well up to 2 MW
Next: Ramp-up rf power. D and E 0.8-1.2 MW, J 1.2-2.2 MW

Jan 7 2004 10:56:20:010AM 1040107006 Steve Wukitch 006 5.4 T, 1 MA, nl04~0.9, fiducial
D: 0.8-1.2 MW ramp [0.6,1.5] sec
E: 0.8-1.2 MW ramp [0.6,1.5] sec
J: 1.2-2.2 MW ramp [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: max faults >1.6 MW
note: J-port phase off by ~45deg - change for next shot

Jan 7 2004 01:58:28:267PM 1040107007 Steve Wukitch 007 5.4 T, 1 MA, nl04~1, fiducial
D: 1-1.3 MW ramp [0.6,1.5] sec
E: 1-1.3 MW ramp [0.6,1.5] sec
J: 1.6-2.4 MW ramp [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran
J: max faults >1.6 MW
dig_phase set to 100 from 140
FMIT#1 crowbarred after the shot and will be out of commission for a couple of shots

Jan 7 2004 11:25:36:397AM 1040107008 Steve Wukitch 008 5.4 T, 1 MA, nl04~1, fiducial
D: 0
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW ramp [0.6,1.5] sec
result: plasma H-mode
E: ran 1 fault
J: ran 8 faults sparkles in front of J
lots of sparkles in front of J-port on wide2

Jan 7 2004 11:59:42:500AM 1040107009 Steve Wukitch 009 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran
E: ran 1 fault
J: ran 8 faults
dig_phase set to 60 from 100 deg

Jan 7 2004 12:00:19:737PM 1040107010 Steve Wukitch 010 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 1 fault
E: ran 2 faults
J: ran 4 faults
dig_phase set to 60 from 90 deg

Jan 7 2004 12:25:54:823PM 1040107011 Steve Wukitch 011 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode - ~200 kJ for ~4.
D: ran 3 faults
E: ran 1 fault
J: ran 2 faults injection from J-port before fault
dig_phase set to 90 from 110 deg

Jan 7 2004 12:47:47:113PM 1040107012 Steve Wukitch 012 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.4 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 2 faults xbarred at 1 sec
E: ran 1 fault
J: ran screen overload early
dig_phase set to 110 from 130 deg - phase in now correct

Jan 7 2004 12:50:46:647PM 1040107013 Steve Wukitch 013 5.4 T, 1 MA, nl04~1, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 7 faults
E: ran
J: ran 2 faults

Jan 7 2004 01:18:40:190PM 1040107014 Steve Wukitch 014 5.4 T, 1 MA, nl04~0.9, fiducial
D: 1.1 MW [0.6,1.5] sec
E: 1.2 MW [0.6,1.5] sec
J: 2.0 MW [0.6,1.5] sec
result: plasma H-mode
D: ran 3 faults
E: ran
J: ran 1 faults

Jan 7 2004 01:18:07:170PM 1040107015 Yijun Lin Start MP376 run.
shot 15
1 MA, 5.4 T, nl04 = .75e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.2 MW, J 1.9 MW, 0.6-1.3 sec
Result: plasma

Wmhd_max= 181 kJ @ Prf = 4.5 MW
dW = Wmhd_max - Wmhd_oh = 140 kJ
dW/Prf = 31 kJ/MW.
Neutral pressure: 0.1

Next raise density by 10%

Jan 7 2004 01:29:19:350PM 1040107016 Yijun Lin shot 16
1 MA, 5.4 T, nl04 = .85e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.2 MW, J 1.9 MW, 0.6-1.3 sec
Result: plasma

Wmhd_max= 195 kJ @ Prf = 4.5 MW
dW = Wmhd_max - Wmhd_oh = 153 kJ
dW/Prf = 34 kJ/MW.
Neutral pressure: 0.1

Next: repeat.

Jan 7 2004 01:40:25:243PM 1040107017 Yijun Lin shot 17
1 MA, 5.4 T, nl04 = .85e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma. Pellet at 1.2 sec

Wmhd_max= 200 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 160 kJ
dW/Prf = 35 kJ/MW.
Neutral pressure: 0.1

Next: raise target density to 1.0

Jan 7 2004 01:55:43:657PM 1040107018 Yijun Lin fizzle

Jan 7 2004 02:14:17:553PM 1040107019 Yijun Lin shot 19:
1 MA, 5.4 T, nl04 = 1.e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma. Pellet at 1.4 sec

Wmhd_max= 190 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 145 kJ
dW/Prf = 31.5 kJ/MW.
Neutral pressure: 0.15

Next: raise target density to 1.2

Jan 7 2004 02:33:13:500PM 1040107020 Yijun Lin shot 20:
1 MA, 5.4 T, nl04 = 1.2e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma. Pellet at 1.4 sec

Wmhd_max= 181 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 137 kJ
dW/Prf = 29.78 kJ/MW.
Neutral pressure: 0.22, 0.4 before rf.

Next: lower target density to 0.6

Jan 7 2004 02:35:13:420PM 1040107021 Yijun Lin fizzle

Jan 7 2004 02:52:05:037PM 1040107022 Yijun Lin shot 22:
1 MA, 5.4 T, nl04 = .6e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma. Pellet at 1.4 sec

Wmhd_max= 210 kJ @ Prf = 4.5 MW
dW = Wmhd_max - Wmhd_oh = 169 kJ
dW/Prf = 38 kJ/MW.
Neutral pressure: 0.08

Next repeat.

Jan 7 2004 03:06:15:213PM 1040107023 Yijun Lin shot 23:
1 MA, 5.4 T, nl04 = .6e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma. Pellet at 1.4 sec

Wmhd_max= 200 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 160 kJ
dW/Prf = 35 kJ/MW.
Neutral pressure: 0.07

Next: no gas puff to unload the wall.

Jan 7 2004 03:25:43:237PM 1040107024 Yijun Lin shot 24:
1 MA, 5.4 T, nl04 = .5e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma. Pellet at 1.4 sec

Wmhd_max= 193 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 160 kJ. Woh = 33 kJ only.
dW/Prf = 35 kJ/MW.
Neutral pressure: 0.07 at Wmhd_max.

An H-mode stayed even all antennas were tripped out.
Next: repeat.

Jan 7 2004 03:57:17:407PM 1040107027 Yijun Lin 1 MA, 5.4 T, nl04 = .6e20 m^-2
Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma.

Wmhd_max= 190 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 147 kJ.
dW/Prf = 32 kJ/MW.
Neutral pressure: 0.05

Getting more impurities after low density shots?

Next: density to 0.75e20 m^-2.

Jan 7 2004 04:09:23:940PM 1040107028 Yijun Lin shot 28
1 MA, 5.4 T, nl04 = .75e20 m^-2
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma.

Wmhd_max= 190 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 147 kJ.
dW/Prf = 32 kJ/MW.
Neutral pressure: 0.06

(Similar result as shot 15 and 16)

Next: density to 0.85e20 m^-2. (like shot 17)

Jan 7 2004 04:23:24:370PM 1040107029 Yijun Lin shot 29
1 MA, 5.4 T, nl04 = .85e20 m^-2
RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma.

Wmhd_max= 181 kJ @ Prf = 4.6 MW
dW = Wmhd_max - Wmhd_oh = 139 kJ. J several trips in the beginning.
dW/Prf = 30 kJ/MW.
Neutral pressure: 0.06

Next: repeat.

Jan 7 2004 04:45:04:377PM 1040107030 Yijun Lin fizzle

Jan 7 2004 04:58:57:117PM 1040107031 Yijun Lin shot 31:
1 MA, 5.4 T, nl04 = 1e20 m^-2
RF request: E 1.15 MW, J 1.95 MW, 0.6-1.3 sec
Result: plasma.

Wmhd_max= 152 kJ @ Prf = 3.6 MW
dW = Wmhd_max - Wmhd_oh = 112 kJ.
dW/Prf = 31 kJ/MW.
Neutral pressure: 0.08

Physics Operator Comments

Jan 7 2004 07:48:36:500AM Jim Irby Engineering setup for Wednesday, 07 Jan 2004

Boronization Recovery, ICRF Conditioning (MP355), and
Performance/Efficiency (MP376)

Session leader: Wukitch/Lin
Physics operator: Irby

The machine will be boronized overnight: dP 120 psi, on/off 0.75/0.25
Follow boronization by ECDC in helium until 07:00

Run begins at 09:00 and ends at 17:00.

Power systems the same as on last shot from run 1040106 (sln fiducial)

A-coils should be hooked up as on 1031204037 (+Dtop -Dbot -Jtop +Jbot), and
the power supply should be enabled.

Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill C-side with 30 psi D2 Hybrid enabled (PG3)

Enable the following gate valves: ECE, VUV, DNB

Jan 7 2004 08:58:16:463AM 1040107001 Jim Irby Cycle test to check data system and gas

data system has problem with hybrid module ---- Josh is checking

gas a little higher than yesterday shot 35.

Jan 7 2004 09:38:06:603AM 1040107002 Jim Irby loaded shot 1040106033 into seg 2 --- 1 MA, snl, fiducial

another cycle test --- still have problem with daq

Jan 7 2004 09:39:29:010AM 1040107003 Jim Irby cycle test --- data system okay!

Jan 7 2004 09:59:53:753AM 1040107004 Jim Irby try for plasma --- starting from shot 1040106033

will toggle gatevalves closed for 8 minutes just before discharge

plasma into rampdown --- serious Ip hesitation, but still went

2.1 MW peak rf, h-mode at by 1.5 MW

h/(h+d) at 4%, slightly lower than shot 33

biii signal about the same as on shot 33 from yesterday

much less gas required than on shot 33

Z_ave lower than shot 33, generally less than 2

Jan 7 2004 10:33:01:750AM 1040107005 Jim Irby no PCS changes

waited for 2e-6 Torr before shot

plasma into rampdown --- similar to last shot

foil main radiation down by nearly a factor of two compared to shot 33 at similar rf power levels
2pi diode also much lower

h-factor still only 1.1 or so (80% eff)

Jan 7 2004 10:48:28:833AM 1040107006 Jim Irby no PCS changes

this shot will be the last one with the gatevalves toggled

plasma into rampdown

Jan 7 2004 11:01:02:713AM 1040107007 Jim Irby PCS repeat

plasma into rampdown

Jan 7 2004 11:28:33:083AM 1040107008 Jim Irby rf guys into power room to check/fix screen crowbar problem on fmit1
taking shot w/o fmit1 after 20 minutes or so..

density request to 7e19 from 8e19/m^2

plasma into rampdown --- lower target density as requested

should have fmit1 back for next shot

Jan 7 2004 11:51:02:983AM 1040107009 Jim Irby fmit1 is back

plasma into rampdown --- 3 h-modes, numerous j-port trips

h-factor 1.3 to 1.5

140 kJ

h/(h+d) at 4% with little change during rf

Jan 7 2004 12:00:05:300PM 1040107010 Jim Irby PCS repeat

plasma into rampdown --- two h-modes

175 kJ

extended period of time with h-factor > 1.5

rf power approx 5 MW

midplane pressure dropping shot-to-shot (slowly)

Jan 7 2004 12:31:55:717PM 1040107011 Jim Irby No PCS changes

plasma into rampdwon --- single h-mode

pause for Josh recover all the data

198 kJ

Jan 7 2004 12:40:24:063PM 1040107012 Jim Irby No PCS changes

plasma into rampdown --- 2 h-modes

less stored energy, less rf power

Prad main at 30 MW --- call a doctor

still more gas required

Jan 7 2004 12:56:37:117PM 1040107013 Jim Irby No PCS changes

Jan 7 2004 01:08:06:277PM 1040107014 Jim Irby No PCS changes

plasma into rampdown ---- 202 kJ

Jan 7 2004 01:16:51:110PM 1040107015 Jim Irby No PCS changes

plasma into rampdown --- nice long h-mode period --- 182 kJ

Jan 7 2004 01:36:10:320PM 1040107016 Jim Irby Nl_04 request from 7.0 to 7.7e19 /m^2

plasma into rampdown --- little higher density --- 193 kJ

Jan 7 2004 02:06:27:427PM 1040107017 Jim Irby No PCS changes

plasma lost a little early (1.77 s) --- pellet killed nl04 --- lost feedback after 1.2 s

Jan 7 2004 02:07:57:880PM 1040107018 Jim Irby fizzle --- let's blame the pellet

Jan 7 2004 02:18:34:650PM 1040107019 Jim Irby Should be higher density
No PCS changes

plasma into rampdown --- 190 kJ --- pellet at 1.4s

Jan 7 2004 02:32:46:077PM 1040107020 Jim Irby NL_04 request to 1.2e20/m^2 from 1.0e20/m^2

pellet kills plasma early

h/(h+d) about 5%

Jan 7 2004 02:44:40:860PM 1040107021 Jim Irby NL_04 request to 6e19/m^2

fizzle

Jan 7 2004 03:01:57:010PM 1040107022 Jim Irby reduced gas puff from 18 to 17 ms.

plasma into rampdown --- no pellet --- 211 kJ

Jan 7 2004 03:08:35:760PM 1040107023 Jim Irby Repeat

plasma into rampdown --- 2 h-modes

Jan 7 2004 03:27:36:817PM 1040107024 Jim Irby density request drawn negative after 300 ms. Try unloading the walls again.

plasma into rampdown --- got lower target density

more radiation/injections

stored energy about 193 kJ at 1.2 s

Jan 7 2004 03:31:07:363PM 1040107025 Jim Irby repeat ---

plasma into rampdown --- target a little lower, h-mode performance degraded

next shot back to 0.6

Jan 7 2004 03:47:58:760PM 1040107026 Jim Irby NL_04 request back to 6e19/m^2

plasma into rampdown --- got target density request, but still bad plasma performance

h/(h+d) gt 7% during rf

Jan 7 2004 03:58:59:500PM 1040107027 Jim Irby repeat

plasma into rampdown --- much better --- 188 kJ

h/(h+d) back down to 5%

Jan 7 2004 04:09:38:973PM 1040107028 Jim Irby nl_04 request to 7.5e19/m^2

plasma into rampdown

Jan 7 2004 04:29:09:323PM 1040107029 Jim Irby nl_04 request to 8.5e19/m^2

plasma into rampdown --- may not have loaded density change, but Yijun okay with what we got.

Jan 7 2004 04:46:02:830PM 1040107030 Jim Irby Density request to 1e20/m^2 --- loaded it

fizzle --- fill getting low

Jan 7 2004 05:40:35:523PM 1040107031 Jim Irby added 1 ms to gas puff

plasma into rampdown

Engineering Operator Comments

Shot Time Type Status Comment

1 08:12:42:350AM Test Ok

3 09:31:10:977AM Test Ok

4 09:46:23:933AM Plasma Ok

5 10:09:55:897AM Plasma Ok

6 10:36:41:330AM Plasma Ok

7 10:53:01:290AM Plasma Ok

8 11:16:26:783AM Plasma Ok

9 11:30:17:537AM Plasma Ok

10 11:48:04:340AM Plasma Ok

11 12:00:52:393PM Plasma Ok

12 12:29:11:763PM Plasma Ok

13 12:42:27:237PM Plasma Ok

14 12:55:37:540PM Plasma Ok

15 01:09:11:980PM Plasma Ok

16 01:22:27:627PM Plasma Ok

17 01:34:53:757PM Plasma Ok

18 01:53:44:077PM Plasma Ok

19 02:07:48:550PM Plasma Ok

20 02:20:21:337PM Plasma Ok

21 02:33:10:043PM Plasma Ok

22 02:46:37:393PM Plasma Ok

23 02:59:18:900PM Plasma Ok

24 03:13:07:513PM Plasma Ok

25 03:25:52:220PM Plasma Ok

26 03:38:35:040PM Plasma Ok

27 03:51:03:653PM Plasma Ok

28 04:03:29:393PM Plasma Ok

29 04:16:06:880PM Plasma Ok

30 04:40:34:657PM Plasma Ok

31 04:53:36:817PM Plasma Ok

Session Leader Comments
Jan 7 2004 09:47:43:933AM	1040107003	Yijun Lin	Shot 1 - 3 were data system test shots. No plasma.
Jan 7 2004 09:55:38:080AM	1040107004	Yijun Lin	shot 04 Load 1040106033 Fiducial shot. 1 MA. 5.4 T, nl04 = 1.e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF step up 1, 2, 3, 4 MW. Result: J ant mismatched. D many faults. E clean. Next: tune antennas and repeat.
Jan 7 2004 10:16:51:353AM	1040107005	Yijun Lin	shot 05 1 MA. 5.4 T, nl04 = 1.e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF step up 1, 2, 3, 4 MW. Result: plasma H-mode D and E ran fine at 1.1 MW level. J ran well up to 2 MW Next: Ramp-up rf power. D and E 0.8-1.2 MW, J 1.2-2.2 MW
Jan 7 2004 10:56:20:010AM	1040107006	Steve Wukitch	006 5.4 T, 1 MA, nl04~0.9, fiducial D: 0.8-1.2 MW ramp [0.6,1.5] sec E: 0.8-1.2 MW ramp [0.6,1.5] sec J: 1.2-2.2 MW ramp [0.6,1.5] sec result: plasma H-mode D: ran E: ran J: max faults >1.6 MW note: J-port phase off by ~45deg - change for next shot
Jan 7 2004 01:58:28:267PM	1040107007	Steve Wukitch	007 5.4 T, 1 MA, nl04~1, fiducial D: 1-1.3 MW ramp [0.6,1.5] sec E: 1-1.3 MW ramp [0.6,1.5] sec J: 1.6-2.4 MW ramp [0.6,1.5] sec result: plasma H-mode D: ran E: ran J: max faults >1.6 MW dig_phase set to 100 from 140 FMIT#1 crowbarred after the shot and will be out of commission for a couple of shots
Jan 7 2004 11:25:36:397AM	1040107008	Steve Wukitch	008 5.4 T, 1 MA, nl04~1, fiducial D: 0 E: 1.2 MW [0.6,1.5] sec J: 2.0 MW ramp [0.6,1.5] sec result: plasma H-mode E: ran 1 fault J: ran 8 faults sparkles in front of J lots of sparkles in front of J-port on wide2
Jan 7 2004 11:59:42:500AM	1040107009	Steve Wukitch	009 5.4 T, 1 MA, nl04~1, fiducial D: 1.1 MW [0.6,1.5] sec E: 1.2 MW [0.6,1.5] sec J: 2.0 MW [0.6,1.5] sec result: plasma H-mode D: ran E: ran 1 fault J: ran 8 faults dig_phase set to 60 from 100 deg
Jan 7 2004 12:00:19:737PM	1040107010	Steve Wukitch	010 5.4 T, 1 MA, nl04~1, fiducial D: 1.1 MW [0.6,1.5] sec E: 1.2 MW [0.6,1.5] sec J: 2.0 MW [0.6,1.5] sec result: plasma H-mode D: ran 1 fault E: ran 2 faults J: ran 4 faults dig_phase set to 60 from 90 deg
Jan 7 2004 12:25:54:823PM	1040107011	Steve Wukitch	011 5.4 T, 1 MA, nl04~1, fiducial D: 1.1 MW [0.6,1.5] sec E: 1.2 MW [0.6,1.5] sec J: 2.0 MW [0.6,1.5] sec result: plasma H-mode - ~200 kJ for ~4. D: ran 3 faults E: ran 1 fault J: ran 2 faults injection from J-port before fault dig_phase set to 90 from 110 deg
Jan 7 2004 12:47:47:113PM	1040107012	Steve Wukitch	012 5.4 T, 1 MA, nl04~1, fiducial D: 1.1 MW [0.6,1.5] sec E: 1.2 MW [0.6,1.5] sec J: 2.4 MW [0.6,1.5] sec result: plasma H-mode D: ran 2 faults xbarred at 1 sec E: ran 1 fault J: ran screen overload early dig_phase set to 110 from 130 deg - phase in now correct
Jan 7 2004 12:50:46:647PM	1040107013	Steve Wukitch	013 5.4 T, 1 MA, nl04~1, fiducial D: 1.1 MW [0.6,1.5] sec E: 1.2 MW [0.6,1.5] sec J: 2.0 MW [0.6,1.5] sec result: plasma H-mode D: ran 7 faults E: ran J: ran 2 faults
Jan 7 2004 01:18:40:190PM	1040107014	Steve Wukitch	014 5.4 T, 1 MA, nl04~0.9, fiducial D: 1.1 MW [0.6,1.5] sec E: 1.2 MW [0.6,1.5] sec J: 2.0 MW [0.6,1.5] sec result: plasma H-mode D: ran 3 faults E: ran J: ran 1 faults
Jan 7 2004 01:18:07:170PM	1040107015	Yijun Lin	Start MP376 run. shot 15 1 MA, 5.4 T, nl04 = .75e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.2 MW, J 1.9 MW, 0.6-1.3 sec Result: plasma Wmhd_max= 181 kJ @ Prf = 4.5 MW dW = Wmhd_max - Wmhd_oh = 140 kJ dW/Prf = 31 kJ/MW. Neutral pressure: 0.1 Next raise density by 10%
Jan 7 2004 01:29:19:350PM	1040107016	Yijun Lin	shot 16 1 MA, 5.4 T, nl04 = .85e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.2 MW, J 1.9 MW, 0.6-1.3 sec Result: plasma Wmhd_max= 195 kJ @ Prf = 4.5 MW dW = Wmhd_max - Wmhd_oh = 153 kJ dW/Prf = 34 kJ/MW. Neutral pressure: 0.1 Next: repeat.
Jan 7 2004 01:40:25:243PM	1040107017	Yijun Lin	shot 17 1 MA, 5.4 T, nl04 = .85e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Pellet at 1.2 sec Wmhd_max= 200 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 160 kJ dW/Prf = 35 kJ/MW. Neutral pressure: 0.1 Next: raise target density to 1.0
Jan 7 2004 01:55:43:657PM	1040107018	Yijun Lin	fizzle
Jan 7 2004 02:14:17:553PM	1040107019	Yijun Lin	shot 19: 1 MA, 5.4 T, nl04 = 1.e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Pellet at 1.4 sec Wmhd_max= 190 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 145 kJ dW/Prf = 31.5 kJ/MW. Neutral pressure: 0.15 Next: raise target density to 1.2
Jan 7 2004 02:33:13:500PM	1040107020	Yijun Lin	shot 20: 1 MA, 5.4 T, nl04 = 1.2e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Pellet at 1.4 sec Wmhd_max= 181 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 137 kJ dW/Prf = 29.78 kJ/MW. Neutral pressure: 0.22, 0.4 before rf. Next: lower target density to 0.6
Jan 7 2004 02:35:13:420PM	1040107021	Yijun Lin	fizzle
Jan 7 2004 02:52:05:037PM	1040107022	Yijun Lin	shot 22: 1 MA, 5.4 T, nl04 = .6e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Pellet at 1.4 sec Wmhd_max= 210 kJ @ Prf = 4.5 MW dW = Wmhd_max - Wmhd_oh = 169 kJ dW/Prf = 38 kJ/MW. Neutral pressure: 0.08 Next repeat.
Jan 7 2004 03:06:15:213PM	1040107023	Yijun Lin	shot 23: 1 MA, 5.4 T, nl04 = .6e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Pellet at 1.4 sec Wmhd_max= 200 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 160 kJ dW/Prf = 35 kJ/MW. Neutral pressure: 0.07 Next: no gas puff to unload the wall.
Jan 7 2004 03:25:43:237PM	1040107024	Yijun Lin	shot 24: 1 MA, 5.4 T, nl04 = .5e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Pellet at 1.4 sec Wmhd_max= 193 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 160 kJ. Woh = 33 kJ only. dW/Prf = 35 kJ/MW. Neutral pressure: 0.07 at Wmhd_max. An H-mode stayed even all antennas were tripped out. Next: repeat.
Jan 7 2004 03:57:17:407PM	1040107027	Yijun Lin	1 MA, 5.4 T, nl04 = .6e20 m^-2 Kappa = 1.6, right gap 0.8, delta_l = 0.56, delta_u= 0.29 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Wmhd_max= 190 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 147 kJ. dW/Prf = 32 kJ/MW. Neutral pressure: 0.05 Getting more impurities after low density shots? Next: density to 0.75e20 m^-2.
Jan 7 2004 04:09:23:940PM	1040107028	Yijun Lin	shot 28 1 MA, 5.4 T, nl04 = .75e20 m^-2 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Wmhd_max= 190 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 147 kJ. dW/Prf = 32 kJ/MW. Neutral pressure: 0.06 (Similar result as shot 15 and 16) Next: density to 0.85e20 m^-2. (like shot 17)
Jan 7 2004 04:23:24:370PM	1040107029	Yijun Lin	shot 29 1 MA, 5.4 T, nl04 = .85e20 m^-2 RF request: D 1.1 MW, E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Wmhd_max= 181 kJ @ Prf = 4.6 MW dW = Wmhd_max - Wmhd_oh = 139 kJ. J several trips in the beginning. dW/Prf = 30 kJ/MW. Neutral pressure: 0.06 Next: repeat.
Jan 7 2004 04:45:04:377PM	1040107030	Yijun Lin	fizzle
Jan 7 2004 04:58:57:117PM	1040107031	Yijun Lin	shot 31: 1 MA, 5.4 T, nl04 = 1e20 m^-2 RF request: E 1.15 MW, J 1.95 MW, 0.6-1.3 sec Result: plasma. Wmhd_max= 152 kJ @ Prf = 3.6 MW dW = Wmhd_max - Wmhd_oh = 112 kJ. dW/Prf = 31 kJ/MW. Neutral pressure: 0.08

Physics Operator Comments
Jan 7 2004 07:48:36:500AM		Jim Irby	Engineering setup for Wednesday, 07 Jan 2004 Boronization Recovery, ICRF Conditioning (MP355), and Performance/Efficiency (MP376) Session leader: Wukitch/Lin Physics operator: Irby The machine will be boronized overnight: dP 120 psi, on/off 0.75/0.25 Follow boronization by ECDC in helium until 07:00 Run begins at 09:00 and ends at 17:00. Power systems the same as on last shot from run 1040106 (sln fiducial) A-coils should be hooked up as on 1031204037 (+Dtop -Dbot -Jtop +Jbot), and the power supply should be enabled. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves: ECE, VUV, DNB
Jan 7 2004 08:58:16:463AM	1040107001	Jim Irby	Cycle test to check data system and gas data system has problem with hybrid module ---- Josh is checking gas a little higher than yesterday shot 35.
Jan 7 2004 09:38:06:603AM	1040107002	Jim Irby	loaded shot 1040106033 into seg 2 --- 1 MA, snl, fiducial another cycle test --- still have problem with daq
Jan 7 2004 09:39:29:010AM	1040107003	Jim Irby	cycle test --- data system okay!
Jan 7 2004 09:59:53:753AM	1040107004	Jim Irby	try for plasma --- starting from shot 1040106033 will toggle gatevalves closed for 8 minutes just before discharge plasma into rampdown --- serious Ip hesitation, but still went 2.1 MW peak rf, h-mode at by 1.5 MW h/(h+d) at 4%, slightly lower than shot 33 biii signal about the same as on shot 33 from yesterday much less gas required than on shot 33 Z_ave lower than shot 33, generally less than 2
Jan 7 2004 10:33:01:750AM	1040107005	Jim Irby	no PCS changes waited for 2e-6 Torr before shot plasma into rampdown --- similar to last shot foil main radiation down by nearly a factor of two compared to shot 33 at similar rf power levels 2pi diode also much lower h-factor still only 1.1 or so (80% eff)
Jan 7 2004 10:48:28:833AM	1040107006	Jim Irby	no PCS changes this shot will be the last one with the gatevalves toggled plasma into rampdown
Jan 7 2004 11:01:02:713AM	1040107007	Jim Irby	PCS repeat plasma into rampdown
Jan 7 2004 11:28:33:083AM	1040107008	Jim Irby	rf guys into power room to check/fix screen crowbar problem on fmit1 taking shot w/o fmit1 after 20 minutes or so.. density request to 7e19 from 8e19/m^2 plasma into rampdown --- lower target density as requested should have fmit1 back for next shot
Jan 7 2004 11:51:02:983AM	1040107009	Jim Irby	fmit1 is back plasma into rampdown --- 3 h-modes, numerous j-port trips h-factor 1.3 to 1.5 140 kJ h/(h+d) at 4% with little change during rf
Jan 7 2004 12:00:05:300PM	1040107010	Jim Irby	PCS repeat plasma into rampdown --- two h-modes 175 kJ extended period of time with h-factor > 1.5 rf power approx 5 MW midplane pressure dropping shot-to-shot (slowly)
Jan 7 2004 12:31:55:717PM	1040107011	Jim Irby	No PCS changes plasma into rampdwon --- single h-mode pause for Josh recover all the data 198 kJ
Jan 7 2004 12:40:24:063PM	1040107012	Jim Irby	No PCS changes plasma into rampdown --- 2 h-modes less stored energy, less rf power Prad main at 30 MW --- call a doctor still more gas required
Jan 7 2004 12:56:37:117PM	1040107013	Jim Irby	No PCS changes
Jan 7 2004 01:08:06:277PM	1040107014	Jim Irby	No PCS changes plasma into rampdown ---- 202 kJ
Jan 7 2004 01:16:51:110PM	1040107015	Jim Irby	No PCS changes plasma into rampdown --- nice long h-mode period --- 182 kJ
Jan 7 2004 01:36:10:320PM	1040107016	Jim Irby	Nl_04 request from 7.0 to 7.7e19 /m^2 plasma into rampdown --- little higher density --- 193 kJ
Jan 7 2004 02:06:27:427PM	1040107017	Jim Irby	No PCS changes plasma lost a little early (1.77 s) --- pellet killed nl04 --- lost feedback after 1.2 s
Jan 7 2004 02:07:57:880PM	1040107018	Jim Irby	fizzle --- let's blame the pellet
Jan 7 2004 02:18:34:650PM	1040107019	Jim Irby	Should be higher density No PCS changes plasma into rampdown --- 190 kJ --- pellet at 1.4s
Jan 7 2004 02:32:46:077PM	1040107020	Jim Irby	NL_04 request to 1.2e20/m^2 from 1.0e20/m^2 pellet kills plasma early h/(h+d) about 5%
Jan 7 2004 02:44:40:860PM	1040107021	Jim Irby	NL_04 request to 6e19/m^2 fizzle
Jan 7 2004 03:01:57:010PM	1040107022	Jim Irby	reduced gas puff from 18 to 17 ms. plasma into rampdown --- no pellet --- 211 kJ
Jan 7 2004 03:08:35:760PM	1040107023	Jim Irby	Repeat plasma into rampdown --- 2 h-modes
Jan 7 2004 03:27:36:817PM	1040107024	Jim Irby	density request drawn negative after 300 ms. Try unloading the walls again. plasma into rampdown --- got lower target density more radiation/injections stored energy about 193 kJ at 1.2 s
Jan 7 2004 03:31:07:363PM	1040107025	Jim Irby	repeat --- plasma into rampdown --- target a little lower, h-mode performance degraded next shot back to 0.6
Jan 7 2004 03:47:58:760PM	1040107026	Jim Irby	NL_04 request back to 6e19/m^2 plasma into rampdown --- got target density request, but still bad plasma performance h/(h+d) gt 7% during rf
Jan 7 2004 03:58:59:500PM	1040107027	Jim Irby	repeat plasma into rampdown --- much better --- 188 kJ h/(h+d) back down to 5%
Jan 7 2004 04:09:38:973PM	1040107028	Jim Irby	nl_04 request to 7.5e19/m^2 plasma into rampdown
Jan 7 2004 04:29:09:323PM	1040107029	Jim Irby	nl_04 request to 8.5e19/m^2 plasma into rampdown --- may not have loaded density change, but Yijun okay with what we got.
Jan 7 2004 04:46:02:830PM	1040107030	Jim Irby	Density request to 1e20/m^2 --- loaded it fizzle --- fill getting low
Jan 7 2004 05:40:35:523PM	1040107031	Jim Irby	added 1 ms to gas puff plasma into rampdown

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:12:42:350AM	Test	Ok
3	09:31:10:977AM	Test	Ok
4	09:46:23:933AM	Plasma	Ok
5	10:09:55:897AM	Plasma	Ok
6	10:36:41:330AM	Plasma	Ok
7	10:53:01:290AM	Plasma	Ok
8	11:16:26:783AM	Plasma	Ok
9	11:30:17:537AM	Plasma	Ok
10	11:48:04:340AM	Plasma	Ok
11	12:00:52:393PM	Plasma	Ok
12	12:29:11:763PM	Plasma	Ok
13	12:42:27:237PM	Plasma	Ok
14	12:55:37:540PM	Plasma	Ok
15	01:09:11:980PM	Plasma	Ok
16	01:22:27:627PM	Plasma	Ok
17	01:34:53:757PM	Plasma	Ok
18	01:53:44:077PM	Plasma	Ok
19	02:07:48:550PM	Plasma	Ok
20	02:20:21:337PM	Plasma	Ok
21	02:33:10:043PM	Plasma	Ok
22	02:46:37:393PM	Plasma	Ok
23	02:59:18:900PM	Plasma	Ok
24	03:13:07:513PM	Plasma	Ok
25	03:25:52:220PM	Plasma	Ok
26	03:38:35:040PM	Plasma	Ok
27	03:51:03:653PM	Plasma	Ok
28	04:03:29:393PM	Plasma	Ok
29	04:16:06:880PM	Plasma	Ok
30	04:40:34:657PM	Plasma	Ok
31	04:53:36:817PM	Plasma	Ok