Alcator C-Mod Run 1031217 Information

Miniproposals

Miniproposal: 377

Date Filed: 11/26/2003

Title: Energy confinement in double-null discharges

First Author: Dale Meade

Session Leader: Dale Meade (shots 1-33)

Session Leader: Earl Marmar (shots 1-33)

Operators
Session leader(s):	Dale Meade,Earl Marmar
Physics operator(s):	Dmitri Mossessian
Engineering operator(s):	Bill Byford,Gary Dekow

Engineering Operator Run Comment
MP#377 Energy Conf in DN; SL Meade/Marmar; PO Mossessian; EO Dekow/Byfor

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:35:460PM

Author: Earl Marmar

Session leader run summary 1031217

MP 377: compare single-null/double-null confinement Day 2: Density
scan at fixed current

SL: Meade/Marmar
PO: Mossessian

This run went well, and the density scan was completed comparing lower
single null (LSN) with double-null (DN)confinement.

This was the second day following boronization, and was preceded by
overnight ECDC in HELIUM.

All shots were 1.0 MA. All double-null shots were well balanced
according to EFIT, with |SSEP|< 2 mm, and used the same nominal
shapes.

For the LSN shots, two different delta_uppers were used, with no
differences obvious.

Target densities (nl_04 ) were around 0.6, 0.7, 0.8, 0.9 and 1.0
e20. We didn't go higher because of previous problems with RF at
higher densities. There were no obvious trends in confinement as a
function of density. We also tried 3 shots with increasing amounts of
gas-puffing preprogrammed during the H-mode phase (shots 24, 25, 26,
all DN); the ultimate density in H-mode was higher with the puff, but
again there was no obvious effect on stored energy (at the peak).

All shots had multiple H-modes with back transitions. DN seem less
EDA-like with small ELMs, but the LSN shots were not strongly EDAish
either.

At the end of the run, we backed off on power (there was a problem
with one of the rf tuning stubs); most shots used 4 to 4.5 MW RF,
shots 31, 32 and 33 were at 3 MW.

Two trends were observed:
1) The first few shots were (transiently)
the best in terms of Wmax, and then there was a gentle decline through
the day.
2) As observed on 1031211, DN discharges had slightly higher
Wmax compared to LSN. Averaged over the whole day, with
0.7 < nl_04 target < 1 e20, Wmax was 11% higher for DN.

Shots for possible further analysis:

DN: 1, 2, 8, 9, 10, 11, 14, 15, 22, 23, 24, 25, 26, 27, 28, 30, 31

LSN: 3, 4, 5, 6, 7, 12, 13, 16, 17, 18, 19, 21, 32, 33

Physics Operator Summaries

Entered: Jul 7 2004 04:37:20:083PM

Author: Dmitri Mossessian

Physop summary for 1031217

MP#377 Energy Conf in DN
SL Meade/Marmar
PO Mossessian

ECDC overnight in He at 9e-5 Torr, stopping at 8 AM
Bake at 60 C overnight

Run begins at 9 AM

Power systems as on 1031216017

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, assuming no vacuum problems:
ECE, VUV, DNB

____________________________

Run plan

We will start with 1031216017 (double null programed in segment 4), reducing Argon puff to 30 msec,
and proceed according to MP 377.

__________________________________________________

Summary:

We started from shot 1031211020, using segment 1 from 1031216017. The run was successfull from the point of view of plasma operation. A density scan was performed for both single lower null and double null configurations. After shot 2 shot 1031210001 was loaded for SN configuration. Then for shot 8 segment 4 was loaded from shot 2 for DN configuration and we kept switching between segments 2 and 4 for SN and DN discharges (see below for details). Overnight ECDC in He depleted the walls of D2 and on shot 2 the current rise in the startup was too fast and lots of runaways were observed. After shot 2 the prepuff was raised from 15 msec to 25 msec, raising the ratiomatic pressure from 0.02 to 0.05 and then the startup was fine for the whole day, except the unexplained fizzle on shot 20. No changes was done to startup after the fizzle. On shot 28 TCI mulfunctioned. Also, RF developed a problem on E port which was not fixed for the rest of the run.

Total 33 shots

1 fizzle
1 no power shot (action monitor problem in INIT phase)
31 plasmas

Details:

----------------------------------------------------------------------------
1031217001 mossessian PHYSICS_OPERATOR Dec 17 2003 9:18:47:183AM
. . . . . . . . . . . . . . . . . . . .
Plasma. Good startup. Not enough RF according to SL.

Next shot - repeat
----------------------------------------------------------------------------
1031217002 mossessian PHYSICS_OPERATOR Dec 17 2003 9:32:55:023AM
. . . . . . . . . . . . . . . . . . . .
Plasma. Low gas pressure in startup leads to very fast current rise,
lots of runaways and hard bounce at 0.02 sec

Next shot: increase prepuff from 15 to 25 msec. Loaded 1031210001, changed target nl to 1e20. Segment 1 is still
from shot 2
----------------------------------------------------------------------------
1031217003 mossessian PHYSICS_OPERATOR Dec 17 2003 9:47:21:343AM
. . . . . . . . . . . . . . . . . . . .
Plasma. Good startup - no runaways although current rise is still fast.

Next shot - repeat
----------------------------------------------------------------------------
1031217004 mossessian PHYSICS_OPERATOR Dec 17 2003 9:56:58:296AM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - lower target nl 1e20 -> 0.8e20
----------------------------------------------------------------------------
1031217005 mossessian PHYSICS_OPERATOR Dec 17 2003 10:15:54:773AM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - repeat trying to get steady RF
----------------------------------------------------------------------------
1031217006 mossessian PHYSICS_OPERATOR Dec 17 2003 10:36:15:360AM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - repeat trying to get steady RF
----------------------------------------------------------------------------
1031217007 mossessian PHYSICS_OPERATOR Dec 17 2003 10:49:59:870AM
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
Plasma. Lower triangularity 0.45

Next shot: repeat
----------------------------------------------------------------------------
1031209022 mossessian PHYSICS_OPERATOR Dec 9 2003 2:33:13:706PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Fields and current rise are exactly the same as on shot 21

Next shot: no change
----------------------------------------------------------------------------
1031209023 mossessian PHYSICS_OPERATOR Dec 9 2003 2:47:09:743PM
. . . . . . . . . . . . . . . . . . . .
Plasma. W peaks at 186. Two periods with small ELMs

Next shot: load segment 2 from shot 20
----------------------------------------------------------------------------
1031209024 mossessian PHYSICS_OPERATOR Dec 9 2003 3:01:27:016PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Good EDA with ELMs

Next shot: repeat
----------------------------------------------------------------------------
1031209025 mossessian PHYSICS_OPERATOR Dec 9 2003 3:10:09:096PM
. . . . . . . . . . . . . . . . . . . .
Plasma. RF trips more, otherwise similar to 24

Next shot: repeat
----------------------------------------------------------------------------
1031209027 mossessian PHYSICS_OPERATOR Dec 9 2003 3:34:56:496PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. As unexplicable as the previous one.

Next shot: no changes
----------------------------------------------------------------------------
1031209028 mossessian PHYSICS_OPERATOR Dec 9 2003 3:49:15:050PM
. . . . . . . . . . . . . . . . . . . .
Plasma

Next shot: load segment 2 from shot 23
----------------------------------------------------------------------------
1031209029 mossessian PHYSICS_OPERATOR Dec 9 2003 4:01:46:180PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Bz is slightly lower than before.

Next shot: IC_EF4U -1335 -> -1325
----------------------------------------------------------------------------
1031209030 mossessian PHYSICS_OPERATOR Dec 9 2003 4:14:57:763PM
. . . . . . . . . . . . . . . . . . . .

Session Leader Comments

Dec 17 2003 09:01:34:707AM Earl Marmar MP377 try for density scan at 1.0 MA comparing SNL, DN and SNU

Dec 17 2003 09:12:38:860AM 1031217001 Earl Marmar start from 1031211020, shorten Ar pulse (from 50 to 30 msec), lengthen RF pulse to stay on to 1.3 second

some RF trips; Wmax = 185 kJ, H89 ~1.6 at dW/dt=0

Dec 17 2003 09:22:51:120AM 1031217001 Dale Meade Repeat 1031211020, ssep = -0.05 cm, 1 MA, Prf = 4.2 MW, _l = 2.1E20,
H = 1.6, delta_L = 0.63, delta_L = 0.55
RF faulting

Dec 17 2003 09:30:58:023AM 1031217002 Dale Meade Repeat ssep = -0.00 cm, 1 MA, Prf = 4.85 MW, _l = 3.0E20,
H = 1.5(@0.85s), delta_L = 0.68, delta_L = 0.55
RF some faults. Lots of hard x-rays.

Dec 17 2003 09:36:27:617AM 1031217002 Earl Marmar repeat to tune RF

plasma
a lot of early hards

better RF
Wmax = 189 kJ; H89 ~ 1.68 (at dW/dt = 0)

Dec 17 2003 09:50:40:267AM 1031217002 Dale Meade repeat ssep=-0.02cm, 1 MA, Prf = 4.6 MW, _l = 3.0E20,
H = 1.5(@0.86s), delta_U = 0.0.64, delta_L = 0.56
RF some faults late

Dec 17 2003 09:39:39:287AM 1031217003 Earl Marmar load from 1031210001 (LSN)

plasma, early RF trip

Wmax = 170

Dec 17 2003 09:43:20:003AM 1031217003 Dale Meade LSN use 1031210001 as setup, ssep < -2 cm, 1 MA, Prf = 4.6 MW, _l = 3.3E20,
H = 1.2(@0.81s), delta_U = 0.3, delta_L = 0.56
RF many faults later

Dec 17 2003 10:00:16:620AM 1031217004 Earl Marmar repeat
plasma
1 early RF trip
Wmax = 156 kJ; H89 ~ 1.2 but after RF trip
-

Dec 17 2003 10:03:32:870AM 1031217004 Dale Meade repeat ssep < -2cm, 1 MA, Prf = 4.8 MW, _l = 3.2E20,
H = 1.25(@0.84s), delta_U = 0.28, delta_L = 0.56
RF tripped just before first H-Mode peak don't use

Dec 17 2003 10:25:39:707AM 1031217005 Earl Marmar nl_04 program to 0.8e20
plasma
nl_04 target = 0.8e20
Wmax = 177 kJ then RF trips
-

Dec 17 2003 10:26:15:317AM 1031217005 Dale Meade SNL, Low density scan point ssep < -2cm, 1 MA, Prf = 2.7 MW, _l = 2.5E20,
H = 1.75(@0.84s), delta_U = 0.28, delta_L = 0.56
headed for Nirvana
RF tripped just before first H-Mode peak don't use

Dec 17 2003 10:28:17:750AM 1031217006 Earl Marmar plasma
nl_04 target = 0.8e20
Wmax = 165 kJ but after first RF trip; H89 ~ 1.5 at dW/dt=0; 4.4 MW RF
-

Dec 17 2003 10:29:40:953AM 1031217006 Dale Meade SNL, Low density scan point ssep < -2cm, 1 MA, Prf = 4.3 MW, _l = 2.54 E20,
H = 1.52(@0.816s), delta_U = 0.29, delta_L = 0.56
headed for Nirvana
RF tripped just before first H-Mode peak don't use

Dec 17 2003 10:50:42:010AM 1031217007 Earl Marmar plasma
nl_04 target = 0.8e20
delay J-port turn-on 100 msec
Wmax = 149 kJ; H89 ~ 1.4 at dW/dt=0; 4.4 MW RF & steady
-

Dec 17 2003 11:02:24:567AM 1031217007 Dale Meade SNL, Low density scan point ssep < -2cm, 1 MA, Prf = 4.25 MW, _l = 2.83 E20,
H = 1.32(@0.858s), delta_U = 0.29, delta_L = 0.56
delayed J-port by 100ms, no RF faults

Dec 17 2003 10:59:10:757AM 1031217008 Earl Marmar DN
plasma
nl_04 target = 0.8e20
delay J-port turn-on 100 msec
Wmax = 139 kJ; H89 ~ 1.15 at dW/dt=0; 4.1 MW RF & steady
-

Dec 17 2003 11:03:55:723AM 1031217008 Dale Meade DN, Low density scan point ssep = -0.04cm, 1 MA, Prf = 4 MW, _l = 2.88 E20,
H = 1.14(@0.85s),
delta_U = 0.63, delta_L = 0.56
delayed J-port by 100ms, RF power fluctuating at L to H transistion

Dec 17 2003 11:11:09:080AM 1031217009 Earl Marmar DN
plasma
nl_04 target = 0.8e20
delay J-port turn-on 10 msec
Wmax = 171 kJ; H89 ~ 1.5 at dW/dt=0; 4.2 MW RF & steady
-

Dec 17 2003 11:14:06:390AM 1031217009 Dale Meade DN, Low density scan point ssep = -0.05cm, 1 MA, Prf = 4.17 MW, _l = 2.77 E20,
H = 1.5(@0.817s),
delta_U = 0.64, delta_L = 0.56
delayed J-port by 10ms,steady

Dec 17 2003 11:26:21:887AM 1031217010 Earl Marmar DN
plasma
nl_04 target = 0.6e20
delay J-port turn-on 10 msec
Wmax = 176 kJ; H89 ~ 1.5 at dW/dt=0; 4.2 MW RF & steady
-

Dec 17 2003 11:38:19:833AM 1031217010 Dale Meade DN, Low density scan point ssep = -0.06 cm, 1 MA, Prf = 4.17 MW, _l = 2.33 E20,
H = 1.43(@0.817s), Prad = 2.85 MW (2PI bolometer), Paux_total = 3.83 MW
delta_U = 0.64, delta_L = 0.56
delayed J-port by 10ms,steady

Dec 17 2003 11:35:21:727AM 1031217011 Earl Marmar DN
plasma
nl_04 target = 0.6e20
delay J-port turn-on 10 msec
Wmax = 166 kJ; H89 ~ 1.5 at dW/dt=0; 4.1 MW RF & drooping slightly during first H-mode
-

Dec 17 2003 11:36:45:867AM 1031217011 Dale Meade DN, Low density scan point ssep = -0.05 cm, 1 MA, Prf = 4.12 MW, _l = 2.2 E20,
H = 1.451(@0.796s), Prad = 2.66 MW (2PI bolometer), Paux_total = 3.72 MW
delta_U = 0.64, delta_L = 0.56
delayed J-port by 10ms,steady

Dec 17 2003 11:52:34:420AM 1031217012 Earl Marmar SNL
plasma
nl_04 target = 0.6e20
delay J-port turn-on 10 msec
Wmax = 163 kJ; H89 ~ 1.55 at dW/dt=0; 4.4 MW RF
-

Dec 17 2003 12:01:45:933PM 1031217012 Dale Meade SNL, same configuration as shot 7 but with lower density
Low density scan point ssep < 2 cm, 1 MA, Prf = 4.31 MW, _l = 1.97 E20,
H = 1.49(@0.802s), Prad = 2.13 MW (2PI bolometer), Paux_total = 3.55 MW
delta_U = 0.28, delta_L = 0.56
delayed J-port by 10ms, steady

Dec 17 2003 12:03:42:480PM 1031217013 Earl Marmar SNL
plasma
nl_04 target = 0.6e20
delay J-port turn-on 10 msec
Wmax = 177 kJ; H89 ~ 1.7 at dW/dt=0; 4.2 MW RF
-

Dec 17 2003 12:06:12:260PM 1031217013 Dale Meade SNL, same configuration as shot 7 but with lower density
Low density scan point ssep < 2 cm, 1 MA, Prf = 4.21 MW, _l = 2.1 E20,
H = 1.7(@0.817s), Prad = 2.56 MW (2PI bolometer), Paux_total = 3.70 MW
delta_U = 0.28, delta_L = 0.56
delayed J-port by 10ms, steady
increased Bt to 5.44 T from 5.34T

Dec 17 2003 12:17:50:160PM 1031217014 Earl Marmar DN
plasma
nl_04 target = 0.6e20
delay J-port turn-on 10 msec
Wmax = 160 kJ; H89 ~ 1.5 at dW/dt=0; 4.2 MW RF
-

Dec 17 2003 12:47:25:277PM 1031217014 Dale Meade DN, same configuration as shot 11 but with lower density
Low density scan point ssep = -0.05 cm, 1 MA, Prf = 4.4 MW, _l = 2.1 E20,
H = 1.44(@0.789s), Prad = 2.62 MW (2PI bolometer), Paux_total = 3.93 MW
delta_U = 0.67, delta_L = 0.54
delayed J-port by 10ms, steady
increased Bt to 5.44 T from 5.34T

Dec 17 2003 12:35:28:780PM 1031217015 Dale Meade DN, same configuration as shot 11 but with medium density (0.8 prefill)
Medium density scan point ssep = -0.02 cm, 1 MA, Prf = 4.27 MW, _l = 2.1 E20,
H = 1.54(@0.796s), Prad = 2.80 MW (2PI bolometer), Paux_total = 3.78 MW
delta_U = 0.65, delta_L = 0.57
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 12:41:42:263PM 1031217016 Earl Marmar SNL
plasma
nl_04 target = 0.8e20
delay J-port turn-on 10 msec
RF trip right at first peak of stored energy
-

Dec 17 2003 12:41:57:747PM 1031217016 Dale Meade SNL,Medium density scan point
ssep < 2 cm, 1 MA, Prf = 4.27 MW, _l = 2.03 E20,
H = 1.49(@0.789s), Prad = 2.48 MW (2PI bolometer), Paux_total = 3.80 MW
delta_U = 0.29, delta_L = 0.57
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 12:56:53:570PM 1031217017 Dale Meade SNL,increase upper triangularity, Medium density scan point
ssep < 2 cm, 1 MA, Prf = 4.3 MW, _l = 1.98 E20,
H = 1.39(@0.782s), Prad = 2.30 MW (2PI bolometer), Paux_total = 4.0 MW
delta_U = 0.48, delta_L = 0.59
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 01:07:52:673PM 1031217017 Earl Marmar SNL; shape from 1031211021 (larger upper triangularity); reduce TF slightly
plasma
nl_04 target = 0.8e20
delay J-port turn-on 10 msec
Wmax = 146 kJ; H89 ~ 1.3 (dW/dt=0)
-

Dec 17 2003 01:10:22:267PM 1031217018 Dale Meade SNL,increase upper triangularity, Medium density scan point
ssep < 2 cm, 1 MA, Prf = 4.47 MW, _l = 2.21 E20,
H = 1.26(@0.809s), Prad = 2.94 MW (2PI bolometer), Paux_total = 4.25 MW
delta_U = 0.47, delta_L = 0.59
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 01:11:23:610PM 1031217018 Earl Marmar SNL
plasma
nl_04 target = 1.0 e20
delay J-port turn-on 10 msec
Wmax = 146 kJ; H89 ~ 1.3 (dW/dt=0)
-

Dec 17 2003 01:27:22:417PM 1031217019 Earl Marmar SNL
plasma
nl_04 target = 1.0 e20
delay J-port turn-on 10 msec
Wmax = 146 kJ; 4.5 MW rf, early trip; H89 ~ 1.2 (dW/dt=0)
-

Dec 17 2003 02:06:39:403PM 1031217019 Dale Meade SNL,, higher density scan point
ssep < 2 cm, 1 MA, Prf = 4.48 MW, _l = 3.2 E20
H = 1.17 (@ 0.85s), Prad = 2.00 MW (2PI bolometer) Paux_total = 4.5 MW
delta_U = 0.46, delta_L = 0.59
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 01:28:53:933PM 1031217020 Earl Marmar SNL
decrease upper triangularity (shape of shot 13, density of shot 19)
fizzle

Dec 17 2003 08:22:23:143AM 1031217021 Dale Meade Session Leader for MP 377 - Density Scan comparing SNL, DN and SNU

Dec 17 2003 01:47:34:173PM 1031217021 Earl Marmar SNL
decrease upper triangularity (shape of shot 13, density of shot 19)
plasma
Wmax 143 kJ, Prf = 4.3 and steady, H_89 ~ 1.3
looks less EDA'ish than shot 19

Dec 17 2003 01:53:54:080PM 1031217021 Dale Meade SNL, Medium density scan point
ssep < 2 cm, 1 MA, Prf = 4.4 MW, _l = 2.88 E20 ),
H = 1.27 (@0.803s), Prad = 1.93 MW (2PI bolometer), Paux _total = 4.2 MW
delta_U = 0.28, delta_L = 0.56
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 02:01:57:640PM 1031217022 Dale Meade DN, Medium density scan point
ssep = -0.03 cm, 1 MA, Prf = 4.25 MW, _l = 2.8 E20
H = 1.36 (@0.789s), Prad = 1.99 MW (2PI bolometer), Paux _total = 3.97 MW
delta_U = 0.64, delta_L = 0.57
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 02:11:01:620PM 1031217022 Earl Marmar DN
plasma
Wmax 152 kJ, Prf = 4.2 and steady, H_89 ~ 1.35; nl_04 target = 1.0e20
looks less EDA'ish than shot 19

Dec 17 2003 02:11:52:870PM 1031217023 Earl Marmar DN
nl_04 target .7e20
plasma
Wmax 160 kJ, Prf = 4.1 and steady, H_89 ~ 1.4

Dec 17 2003 02:14:01:993PM 1031217023 Dale Meade DN, Medium density scan point
ssep = 0.01 cm, 1 MA, Prf = 4.16 MW, _l = 2.3 E20
H = 1.47 (@0.789s), Prad = 2.27 MW (2PI bolometer), Paux _total = 3.97 MW
delta_U = 0.78, delta_L = 0.55
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 02:30:03:653PM 1031217024 Dale Meade DN, Medium density scan point, gas puff @ .71 to 1.0 s.
ssep = -0.031 cm, 1 MA, Prf = 3.94 MW, _l = 2.5 E20
H = 1.47 (@0.789s), Prad = 2.04 MW (2PI bolometer), Paux _total = 3.67 MW
delta_U = 0.65, delta_L = 0.55
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 02:31:32:717PM 1031217024 Earl Marmar DN
nl_04 target .7e20; then puff into H-mode (40 volts on valve from .71 to 1.1)
plasma
Wmax 161 kJ, Prf = 4.1 and steady, H_89 ~ 1.48 (at dW/dt = 0)

Dec 17 2003 02:46:57:880PM 1031217025 Earl Marmar DN
nl_04 target .7e20; then puff into H-mode (65 volts on valve from .71 to 1.1)
plasma
Wmax 157 kJ, Prf = 4.2 and steady, H_89 ~ 1.36 (at dW/dt = 0)

Dec 17 2003 02:59:08:307PM 1031217025 Dale Meade DN, Medium density scan point, gas puff 6x @ .71 to 1.0 s.
ssep = -0.06 cm, 1 MA, Prf = 4.27 MW, _l = 2.84 E20
H = 1.27 (@0.809s), Prad = 2.20 MW (2PI bolometer), Paux _total = 4.21 MW
delta_U = 0.64, delta_L = 0.56
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 02:54:18:163PM 1031217026 Earl Marmar DN
nl_04 target .7e20; then puff into H-mode (90 volts on valve from .71 to 1.1)
plasma
Wmax 158 kJ, Prf = 4.2, H_89 ~ 1.38 (at dW/dt = 0)

Dec 17 2003 03:03:59:590PM 1031217027 Dale Meade 8x @ .71 to 1.0 s.
ssep = 0.02 cm, 1 MA, Prf = 4.71 MW, _l = 2.63 E20
H = 1.24 (@0.789s), Prad = 2.00 MW (2PI bolometer), Paux _total = 4.35 MW
delta_U = 0.63, delta_L = 0.56
delayed J-port by 10ms, steady Bt to 5.44 T

Dec 17 2003 03:04:55:433PM 1031217027 Earl Marmar DN
nl_04 target .8e20; turn off puff into H-mode
plasma
Wmax 150 kJ, Prf = 4.9 but early trip

Dec 17 2003 04:40:08:483PM 1031217028 Earl Marmar DN
problem with density feedback
nl_04 target 5.6e19
Wmax 142 kJ, Prf = 4.6; H89 ~ 1.3 but big impurity injection early in h-mode

Dec 17 2003 04:22:05:900PM 1031217029 Earl Marmar no power cycle

data system hang

Dec 17 2003 04:27:33:980PM 1031217030 Earl Marmar DN
nl_04 target = .85e20
lower Prf to 3.8 MW (D port no longer available - tuner problem)

Early RF trip, Wmax = 134 kJ

Dec 17 2003 04:43:57:470PM 1031217031 Earl Marmar DN
try for lower rf power
nl_04 target = .85e20
Prf = 3.0
Wmax = 122kJ, H89 ~ 1.27 (dW/dt =0)

Dec 17 2003 04:53:59:257PM 1031217032 Earl Marmar LSN
nl_04 target = .82e20
Prf = 3.0
Wmax = 105kJ, H89 ~ 1.06 (dW/dt =0)

Dec 17 2003 05:05:30:323PM 1031217033 Earl Marmar LSN, increased upper triangularity
nl_04 target = .9e20
Prf = 3.2
Wmax = 115 kJ, H89 ~ 1.2 (dW/dt =0)

Physics Operator Comments

Dec 17 2003 08:41:05:153AM Dmitri Mossessian MP#377 Energy Conf in DN
SL Meade/Marmar
PO Mossessian

ECDC overnight in He at 9e-5 Torr, stopping at 8 AM
Bake at 60 C overnight

Run begins at 9 AM

Power systems as on 1031216017

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, assuming no vacuum problems:
ECE, VUV, DNB

____________________________

Run plan

We will start with 1031216017 (double null programed in segment 4), reducing Argon puff to 30 msec,
and proceed according to MP 377.

8:40
Loaded 1031216017. Argon from 0.37 to 0.4 sec

Dec 17 2003 08:54:13:630AM Dmitri Mossessian At Earl's request loaded 1031211020 instead of 1031216017.
Reloaded segment 1 from 1031216017. Reduced Ar in segment 4

Dec 17 2003 09:18:47:183AM 1031217001 Dmitri Mossessian Plasma. Good startup. Not enough RF according to SL.

Next shot - repeat

Dec 17 2003 09:32:55:023AM 1031217002 Dmitri Mossessian Plasma. Low gas pressure in startup leads to very fast current rise,
lots of runaways and hard bounce at 0.02 sec

Next shot: increase prepuff from 15 to 25 msec. Loaded 1031210001, changed target nl to 1e20. Segment 1 is still
from shot 2

Dec 17 2003 09:47:21:343AM 1031217003 Dmitri Mossessian Plasma. Good startup - no runaways although current rise is still fast.

Next shot - repeat

Dec 17 2003 09:56:58:297AM 1031217004 Dmitri Mossessian Plasma.

Next shot - lower target nl 1e20 -> 0.8e20

Dec 17 2003 10:15:54:773AM 1031217005 Dmitri Mossessian Plasma.

Next shot - repeat trying to get steady RF

Dec 17 2003 10:36:15:360AM 1031217006 Dmitri Mossessian Plasma.

Next shot - repeat trying to get steady RF

Dec 17 2003 10:49:59:870AM 1031217007 Dmitri Mossessian Plasma.

Next shot -go to DN configuration. Import segment 4 from shot 2. Change Ar puff to 35 msec
changed target nl to 0.8e20

Dec 17 2003 10:57:42:583AM 1031217008 Dmitri Mossessian Plasma. Good double null.

Next shot - repeat with better RF

Dec 17 2003 11:09:13:690AM 1031217009 Dmitri Mossessian Plasma. Similar to shot 8

Next shot - lower target nl to 0.6e20

Dec 17 2003 11:29:18:307AM 1031217010 Dmitri Mossessian Plasma.

Next shot - repeat

Dec 17 2003 12:03:30:823PM 1031217011 Dmitri Mossessian Plasma.

Next shot - went to segment 2 - single null. Lowered nl in segment 2 to 0.6e20

Dec 17 2003 11:52:21:640AM 1031217012 Dmitri Mossessian Plasma.

Next shot - repeat

Dec 17 2003 12:04:25:090PM 1031217013 Dmitri Mossessian Plasma.

Next shot - change TF current in segment 2 to 147500 to be the same as in segment 4
Switched back to segment 4 to shot 11, double null

Dec 17 2003 12:17:30:867PM 1031217014 Dmitri Mossessian Plasma.

Next shot - nl up to 0.8 e20

Dec 17 2003 12:24:37:380PM 1031217015 Dmitri Mossessian Plasma.

Next shot - switch back to single null (segment 2), nl = 0.8e20

Dec 17 2003 12:43:23:560PM 1031217016 Dmitri Mossessian Plasma.

Next shot - loaded se3gment 2 from 1031211021 (higher upper triangularity)
changed TF current and Ar to be as on shot 16. nl=0.8e20

Dec 17 2003 12:52:04:057PM 1031217017 Dmitri Mossessian Plasma.

Next shot - target nl up to 1e20

Dec 17 2003 01:05:12:830PM 1031217018 Dmitri Mossessian Plasma.

Next shot - repeat

Dec 17 2003 01:19:46:797PM 1031217019 Dmitri Mossessian Plasma. First QC mode of the day

Next shot - load segment 2 from shot 13. Change TF current to 147500. Target nl = 1e20

Dec 17 2003 01:32:35:120PM 1031217020 Dmitri Mossessian Fizzle.

Next shot - no changes

Dec 17 2003 01:46:47:927PM 1031217021 Dmitri Mossessian Plasma. Upper delta 0.28

Next shot - go back to double null. Turn segment 4 on, change target nl to 1e20

Dec 17 2003 02:02:30:950PM 1031217022 Dmitri Mossessian Plasma.

Next shot - nl 1e20 -> 0.7e2

Dec 17 2003 02:27:11:450PM 1031217023 Dmitri Mossessian Plasma.

Next shot - add gas puff into H-mode from 0.71 sec. Turned off nl04 gain @ 0.71 s,
change PG_3 to be 40 V from .71 to 1.1 sec

Dec 17 2003 02:29:09:403PM 1031217024 Dmitri Mossessian Plasma.

Next shot - raise gas puff into H-mode - PG_3 40 -> 65 V between .71 and 1.1 sec

Dec 17 2003 02:42:37:957PM 1031217025 Dmitri Mossessian Plasma.

Next shot - raise gas puff into H-mode - PG_3 65 -> 90 V between .71 and 1.1 sec

Dec 17 2003 02:51:56:413PM 1031217026 Dmitri Mossessian Plasma.

Next shot - turn gas puff off, nl feedback gain back on, nl target to 8e19

Dec 17 2003 03:06:55:357PM 1031217027 Dmitri Mossessian Plasma.

Next shot - repeat

Dec 17 2003 03:45:02:310PM 1031217028 Dmitri Mossessian Plasma. TCI has problems - target nl is only 5e19. No RF data - CAMAC decoder problems.

Next shot - repeat

Dec 17 2003 04:17:23:133PM 1031217028 Dmitri Mossessian Action monitor problem in INIT phase led to no power shot.
RF E-port is not working - motor drice problems.

Dec 17 2003 04:32:38:890PM 1031217030 Dmitri Mossessian Plasma

Next shot - no change

Dec 17 2003 04:42:06:423PM 1031217031 Dmitri Mossessian Plasma

Next shot - go to single null - turn on segment 2, nl -> 0.8e20

Dec 17 2003 04:53:06:567PM 1031217032 Dmitri Mossessian Plasma

Next shot - load segment 2 from shot 19, adjust TF current to 147500, target nl to 0.8e19

Dec 17 2003 05:02:27:650PM 1031217033 Dmitri Mossessian Plasma

Engineering Operator Comments

Shot Time Type Status Comment

1 09:04:02:520AM Plasma Ok

2 09:17:21:653AM Plasma Ok

3 09:31:53:367AM Plasma Ok

4 09:52:06:717AM Plasma Ok

5 10:10:01:570AM Plasma Ok

6 10:23:07:923AM Plasma Ok

7 10:36:41:060AM Plasma Ok

8 10:50:49:070AM Plasma Ok

9 11:03:45:363AM Plasma Ok

10 11:16:13:310AM Plasma Ok

11 11:29:01:070AM Plasma Ok

12 11:42:36:503AM Plasma Ok

13 11:55:16:937AM Plasma Ok

14 12:07:41:963PM Plasma Ok

15 12:20:29:303PM Plasma Ok

16 12:33:00:487PM Plasma Ok

17 12:45:29:213PM Plasma Ok

18 12:58:53:380PM Plasma Ok

19 01:11:27:673PM Plasma Ok

20 01:26:11:527PM Plasma Ok

21 01:38:32:087PM Plasma Ok

22 01:51:11:267PM Plasma Ok

23 02:05:46:260PM Plasma Ok

24 02:19:26:117PM Plasma Ok

25 02:32:03:983PM Plasma Ok

26 02:44:54:253PM Plasma Ok

27 02:57:16:227PM Plasma Ok

28 03:26:45:600PM Plasma Ok

30 04:21:50:510PM Plasma Ok

31 04:34:12:873PM Plasma Ok

32 04:47:20:490PM Plasma Ok

33 05:00:08:930PM Plasma Ok

Session Leader Comments
Dec 17 2003 09:01:34:707AM		Earl Marmar	MP377 try for density scan at 1.0 MA comparing SNL, DN and SNU
Dec 17 2003 09:12:38:860AM	1031217001	Earl Marmar	start from 1031211020, shorten Ar pulse (from 50 to 30 msec), lengthen RF pulse to stay on to 1.3 second some RF trips; Wmax = 185 kJ, H89 ~1.6 at dW/dt=0
Dec 17 2003 09:22:51:120AM	1031217001	Dale Meade	Repeat 1031211020, ssep = -0.05 cm, 1 MA, Prf = 4.2 MW, _l = 2.1E20, H = 1.6, delta_L = 0.63, delta_L = 0.55 RF faulting
Dec 17 2003 09:30:58:023AM	1031217002	Dale Meade	Repeat ssep = -0.00 cm, 1 MA, Prf = 4.85 MW, _l = 3.0E20, H = 1.5(@0.85s), delta_L = 0.68, delta_L = 0.55 RF some faults. Lots of hard x-rays.
Dec 17 2003 09:36:27:617AM	1031217002	Earl Marmar	repeat to tune RF plasma a lot of early hards better RF Wmax = 189 kJ; H89 ~ 1.68 (at dW/dt = 0)
Dec 17 2003 09:50:40:267AM	1031217002	Dale Meade	repeat ssep=-0.02cm, 1 MA, Prf = 4.6 MW, _l = 3.0E20, H = 1.5(@0.86s), delta_U = 0.0.64, delta_L = 0.56 RF some faults late
Dec 17 2003 09:39:39:287AM	1031217003	Earl Marmar	load from 1031210001 (LSN) plasma, early RF trip Wmax = 170
Dec 17 2003 09:43:20:003AM	1031217003	Dale Meade	LSN use 1031210001 as setup, ssep < -2 cm, 1 MA, Prf = 4.6 MW, _l = 3.3E20, H = 1.2(@0.81s), delta_U = 0.3, delta_L = 0.56 RF many faults later
Dec 17 2003 10:00:16:620AM	1031217004	Earl Marmar	repeat plasma 1 early RF trip Wmax = 156 kJ; H89 ~ 1.2 but after RF trip -
Dec 17 2003 10:03:32:870AM	1031217004	Dale Meade	repeat ssep < -2cm, 1 MA, Prf = 4.8 MW, _l = 3.2E20, H = 1.25(@0.84s), delta_U = 0.28, delta_L = 0.56 RF tripped just before first H-Mode peak don't use
Dec 17 2003 10:25:39:707AM	1031217005	Earl Marmar	nl_04 program to 0.8e20 plasma nl_04 target = 0.8e20 Wmax = 177 kJ then RF trips -
Dec 17 2003 10:26:15:317AM	1031217005	Dale Meade	SNL, Low density scan point ssep < -2cm, 1 MA, Prf = 2.7 MW, _l = 2.5E20, H = 1.75(@0.84s), delta_U = 0.28, delta_L = 0.56 headed for Nirvana RF tripped just before first H-Mode peak don't use
Dec 17 2003 10:28:17:750AM	1031217006	Earl Marmar	plasma nl_04 target = 0.8e20 Wmax = 165 kJ but after first RF trip; H89 ~ 1.5 at dW/dt=0; 4.4 MW RF -
Dec 17 2003 10:29:40:953AM	1031217006	Dale Meade	SNL, Low density scan point ssep < -2cm, 1 MA, Prf = 4.3 MW, _l = 2.54 E20, H = 1.52(@0.816s), delta_U = 0.29, delta_L = 0.56 headed for Nirvana RF tripped just before first H-Mode peak don't use
Dec 17 2003 10:50:42:010AM	1031217007	Earl Marmar	plasma nl_04 target = 0.8e20 delay J-port turn-on 100 msec Wmax = 149 kJ; H89 ~ 1.4 at dW/dt=0; 4.4 MW RF & steady -
Dec 17 2003 11:02:24:567AM	1031217007	Dale Meade	SNL, Low density scan point ssep < -2cm, 1 MA, Prf = 4.25 MW, _l = 2.83 E20, H = 1.32(@0.858s), delta_U = 0.29, delta_L = 0.56 delayed J-port by 100ms, no RF faults
Dec 17 2003 10:59:10:757AM	1031217008	Earl Marmar	DN plasma nl_04 target = 0.8e20 delay J-port turn-on 100 msec Wmax = 139 kJ; H89 ~ 1.15 at dW/dt=0; 4.1 MW RF & steady -
Dec 17 2003 11:03:55:723AM	1031217008	Dale Meade	DN, Low density scan point ssep = -0.04cm, 1 MA, Prf = 4 MW, _l = 2.88 E20, H = 1.14(@0.85s), delta_U = 0.63, delta_L = 0.56 delayed J-port by 100ms, RF power fluctuating at L to H transistion
Dec 17 2003 11:11:09:080AM	1031217009	Earl Marmar	DN plasma nl_04 target = 0.8e20 delay J-port turn-on 10 msec Wmax = 171 kJ; H89 ~ 1.5 at dW/dt=0; 4.2 MW RF & steady -
Dec 17 2003 11:14:06:390AM	1031217009	Dale Meade	DN, Low density scan point ssep = -0.05cm, 1 MA, Prf = 4.17 MW, _l = 2.77 E20, H = 1.5(@0.817s), delta_U = 0.64, delta_L = 0.56 delayed J-port by 10ms,steady
Dec 17 2003 11:26:21:887AM	1031217010	Earl Marmar	DN plasma nl_04 target = 0.6e20 delay J-port turn-on 10 msec Wmax = 176 kJ; H89 ~ 1.5 at dW/dt=0; 4.2 MW RF & steady -
Dec 17 2003 11:38:19:833AM	1031217010	Dale Meade	DN, Low density scan point ssep = -0.06 cm, 1 MA, Prf = 4.17 MW, _l = 2.33 E20, H = 1.43(@0.817s), Prad = 2.85 MW (2PI bolometer), Paux_total = 3.83 MW delta_U = 0.64, delta_L = 0.56 delayed J-port by 10ms,steady
Dec 17 2003 11:35:21:727AM	1031217011	Earl Marmar	DN plasma nl_04 target = 0.6e20 delay J-port turn-on 10 msec Wmax = 166 kJ; H89 ~ 1.5 at dW/dt=0; 4.1 MW RF & drooping slightly during first H-mode -
Dec 17 2003 11:36:45:867AM	1031217011	Dale Meade	DN, Low density scan point ssep = -0.05 cm, 1 MA, Prf = 4.12 MW, _l = 2.2 E20, H = 1.451(@0.796s), Prad = 2.66 MW (2PI bolometer), Paux_total = 3.72 MW delta_U = 0.64, delta_L = 0.56 delayed J-port by 10ms,steady
Dec 17 2003 11:52:34:420AM	1031217012	Earl Marmar	SNL plasma nl_04 target = 0.6e20 delay J-port turn-on 10 msec Wmax = 163 kJ; H89 ~ 1.55 at dW/dt=0; 4.4 MW RF -
Dec 17 2003 12:01:45:933PM	1031217012	Dale Meade	SNL, same configuration as shot 7 but with lower density Low density scan point ssep < 2 cm, 1 MA, Prf = 4.31 MW, _l = 1.97 E20, H = 1.49(@0.802s), Prad = 2.13 MW (2PI bolometer), Paux_total = 3.55 MW delta_U = 0.28, delta_L = 0.56 delayed J-port by 10ms, steady
Dec 17 2003 12:03:42:480PM	1031217013	Earl Marmar	SNL plasma nl_04 target = 0.6e20 delay J-port turn-on 10 msec Wmax = 177 kJ; H89 ~ 1.7 at dW/dt=0; 4.2 MW RF -
Dec 17 2003 12:06:12:260PM	1031217013	Dale Meade	SNL, same configuration as shot 7 but with lower density Low density scan point ssep < 2 cm, 1 MA, Prf = 4.21 MW, _l = 2.1 E20, H = 1.7(@0.817s), Prad = 2.56 MW (2PI bolometer), Paux_total = 3.70 MW delta_U = 0.28, delta_L = 0.56 delayed J-port by 10ms, steady increased Bt to 5.44 T from 5.34T
Dec 17 2003 12:17:50:160PM	1031217014	Earl Marmar	DN plasma nl_04 target = 0.6e20 delay J-port turn-on 10 msec Wmax = 160 kJ; H89 ~ 1.5 at dW/dt=0; 4.2 MW RF -
Dec 17 2003 12:47:25:277PM	1031217014	Dale Meade	DN, same configuration as shot 11 but with lower density Low density scan point ssep = -0.05 cm, 1 MA, Prf = 4.4 MW, _l = 2.1 E20, H = 1.44(@0.789s), Prad = 2.62 MW (2PI bolometer), Paux_total = 3.93 MW delta_U = 0.67, delta_L = 0.54 delayed J-port by 10ms, steady increased Bt to 5.44 T from 5.34T
Dec 17 2003 12:35:28:780PM	1031217015	Dale Meade	DN, same configuration as shot 11 but with medium density (0.8 prefill) Medium density scan point ssep = -0.02 cm, 1 MA, Prf = 4.27 MW, _l = 2.1 E20, H = 1.54(@0.796s), Prad = 2.80 MW (2PI bolometer), Paux_total = 3.78 MW delta_U = 0.65, delta_L = 0.57 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 12:41:42:263PM	1031217016	Earl Marmar	SNL plasma nl_04 target = 0.8e20 delay J-port turn-on 10 msec RF trip right at first peak of stored energy -
Dec 17 2003 12:41:57:747PM	1031217016	Dale Meade	SNL,Medium density scan point ssep < 2 cm, 1 MA, Prf = 4.27 MW, _l = 2.03 E20, H = 1.49(@0.789s), Prad = 2.48 MW (2PI bolometer), Paux_total = 3.80 MW delta_U = 0.29, delta_L = 0.57 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 12:56:53:570PM	1031217017	Dale Meade	SNL,increase upper triangularity, Medium density scan point ssep < 2 cm, 1 MA, Prf = 4.3 MW, _l = 1.98 E20, H = 1.39(@0.782s), Prad = 2.30 MW (2PI bolometer), Paux_total = 4.0 MW delta_U = 0.48, delta_L = 0.59 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 01:07:52:673PM	1031217017	Earl Marmar	SNL; shape from 1031211021 (larger upper triangularity); reduce TF slightly plasma nl_04 target = 0.8e20 delay J-port turn-on 10 msec Wmax = 146 kJ; H89 ~ 1.3 (dW/dt=0) -
Dec 17 2003 01:10:22:267PM	1031217018	Dale Meade	SNL,increase upper triangularity, Medium density scan point ssep < 2 cm, 1 MA, Prf = 4.47 MW, _l = 2.21 E20, H = 1.26(@0.809s), Prad = 2.94 MW (2PI bolometer), Paux_total = 4.25 MW delta_U = 0.47, delta_L = 0.59 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 01:11:23:610PM	1031217018	Earl Marmar	SNL plasma nl_04 target = 1.0 e20 delay J-port turn-on 10 msec Wmax = 146 kJ; H89 ~ 1.3 (dW/dt=0) -
Dec 17 2003 01:27:22:417PM	1031217019	Earl Marmar	SNL plasma nl_04 target = 1.0 e20 delay J-port turn-on 10 msec Wmax = 146 kJ; 4.5 MW rf, early trip; H89 ~ 1.2 (dW/dt=0) -
Dec 17 2003 02:06:39:403PM	1031217019	Dale Meade	SNL,, higher density scan point ssep < 2 cm, 1 MA, Prf = 4.48 MW, _l = 3.2 E20 H = 1.17 (@ 0.85s), Prad = 2.00 MW (2PI bolometer) Paux_total = 4.5 MW delta_U = 0.46, delta_L = 0.59 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 01:28:53:933PM	1031217020	Earl Marmar	SNL decrease upper triangularity (shape of shot 13, density of shot 19) fizzle
Dec 17 2003 08:22:23:143AM	1031217021	Dale Meade	Session Leader for MP 377 - Density Scan comparing SNL, DN and SNU
Dec 17 2003 01:47:34:173PM	1031217021	Earl Marmar	SNL decrease upper triangularity (shape of shot 13, density of shot 19) plasma Wmax 143 kJ, Prf = 4.3 and steady, H_89 ~ 1.3 looks less EDA'ish than shot 19
Dec 17 2003 01:53:54:080PM	1031217021	Dale Meade	SNL, Medium density scan point ssep < 2 cm, 1 MA, Prf = 4.4 MW, _l = 2.88 E20 ), H = 1.27 (@0.803s), Prad = 1.93 MW (2PI bolometer), Paux _total = 4.2 MW delta_U = 0.28, delta_L = 0.56 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 02:01:57:640PM	1031217022	Dale Meade	DN, Medium density scan point ssep = -0.03 cm, 1 MA, Prf = 4.25 MW, _l = 2.8 E20 H = 1.36 (@0.789s), Prad = 1.99 MW (2PI bolometer), Paux _total = 3.97 MW delta_U = 0.64, delta_L = 0.57 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 02:11:01:620PM	1031217022	Earl Marmar	DN plasma Wmax 152 kJ, Prf = 4.2 and steady, H_89 ~ 1.35; nl_04 target = 1.0e20 looks less EDA'ish than shot 19
Dec 17 2003 02:11:52:870PM	1031217023	Earl Marmar	DN nl_04 target .7e20 plasma Wmax 160 kJ, Prf = 4.1 and steady, H_89 ~ 1.4
Dec 17 2003 02:14:01:993PM	1031217023	Dale Meade	DN, Medium density scan point ssep = 0.01 cm, 1 MA, Prf = 4.16 MW, _l = 2.3 E20 H = 1.47 (@0.789s), Prad = 2.27 MW (2PI bolometer), Paux _total = 3.97 MW delta_U = 0.78, delta_L = 0.55 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 02:30:03:653PM	1031217024	Dale Meade	DN, Medium density scan point, gas puff @ .71 to 1.0 s. ssep = -0.031 cm, 1 MA, Prf = 3.94 MW, _l = 2.5 E20 H = 1.47 (@0.789s), Prad = 2.04 MW (2PI bolometer), Paux _total = 3.67 MW delta_U = 0.65, delta_L = 0.55 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 02:31:32:717PM	1031217024	Earl Marmar	DN nl_04 target .7e20; then puff into H-mode (40 volts on valve from .71 to 1.1) plasma Wmax 161 kJ, Prf = 4.1 and steady, H_89 ~ 1.48 (at dW/dt = 0)
Dec 17 2003 02:46:57:880PM	1031217025	Earl Marmar	DN nl_04 target .7e20; then puff into H-mode (65 volts on valve from .71 to 1.1) plasma Wmax 157 kJ, Prf = 4.2 and steady, H_89 ~ 1.36 (at dW/dt = 0)
Dec 17 2003 02:59:08:307PM	1031217025	Dale Meade	DN, Medium density scan point, gas puff 6x @ .71 to 1.0 s. ssep = -0.06 cm, 1 MA, Prf = 4.27 MW, _l = 2.84 E20 H = 1.27 (@0.809s), Prad = 2.20 MW (2PI bolometer), Paux _total = 4.21 MW delta_U = 0.64, delta_L = 0.56 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 02:54:18:163PM	1031217026	Earl Marmar	DN nl_04 target .7e20; then puff into H-mode (90 volts on valve from .71 to 1.1) plasma Wmax 158 kJ, Prf = 4.2, H_89 ~ 1.38 (at dW/dt = 0)
Dec 17 2003 03:03:59:590PM	1031217027	Dale Meade	8x @ .71 to 1.0 s. ssep = 0.02 cm, 1 MA, Prf = 4.71 MW, _l = 2.63 E20 H = 1.24 (@0.789s), Prad = 2.00 MW (2PI bolometer), Paux _total = 4.35 MW delta_U = 0.63, delta_L = 0.56 delayed J-port by 10ms, steady Bt to 5.44 T
Dec 17 2003 03:04:55:433PM	1031217027	Earl Marmar	DN nl_04 target .8e20; turn off puff into H-mode plasma Wmax 150 kJ, Prf = 4.9 but early trip
Dec 17 2003 04:40:08:483PM	1031217028	Earl Marmar	DN problem with density feedback nl_04 target 5.6e19 Wmax 142 kJ, Prf = 4.6; H89 ~ 1.3 but big impurity injection early in h-mode
Dec 17 2003 04:22:05:900PM	1031217029	Earl Marmar	no power cycle data system hang
Dec 17 2003 04:27:33:980PM	1031217030	Earl Marmar	DN nl_04 target = .85e20 lower Prf to 3.8 MW (D port no longer available - tuner problem) Early RF trip, Wmax = 134 kJ
Dec 17 2003 04:43:57:470PM	1031217031	Earl Marmar	DN try for lower rf power nl_04 target = .85e20 Prf = 3.0 Wmax = 122kJ, H89 ~ 1.27 (dW/dt =0)
Dec 17 2003 04:53:59:257PM	1031217032	Earl Marmar	LSN nl_04 target = .82e20 Prf = 3.0 Wmax = 105kJ, H89 ~ 1.06 (dW/dt =0)
Dec 17 2003 05:05:30:323PM	1031217033	Earl Marmar	LSN, increased upper triangularity nl_04 target = .9e20 Prf = 3.2 Wmax = 115 kJ, H89 ~ 1.2 (dW/dt =0)

Physics Operator Comments
Dec 17 2003 08:41:05:153AM		Dmitri Mossessian	MP#377 Energy Conf in DN SL Meade/Marmar PO Mossessian ECDC overnight in He at 9e-5 Torr, stopping at 8 AM Bake at 60 C overnight Run begins at 9 AM Power systems as on 1031216017 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, assuming no vacuum problems: ECE, VUV, DNB ____________________________ Run plan We will start with 1031216017 (double null programed in segment 4), reducing Argon puff to 30 msec, and proceed according to MP 377. 8:40 Loaded 1031216017. Argon from 0.37 to 0.4 sec
Dec 17 2003 08:54:13:630AM		Dmitri Mossessian	At Earl's request loaded 1031211020 instead of 1031216017. Reloaded segment 1 from 1031216017. Reduced Ar in segment 4
Dec 17 2003 09:18:47:183AM	1031217001	Dmitri Mossessian	Plasma. Good startup. Not enough RF according to SL. Next shot - repeat
Dec 17 2003 09:32:55:023AM	1031217002	Dmitri Mossessian	Plasma. Low gas pressure in startup leads to very fast current rise, lots of runaways and hard bounce at 0.02 sec Next shot: increase prepuff from 15 to 25 msec. Loaded 1031210001, changed target nl to 1e20. Segment 1 is still from shot 2
Dec 17 2003 09:47:21:343AM	1031217003	Dmitri Mossessian	Plasma. Good startup - no runaways although current rise is still fast. Next shot - repeat
Dec 17 2003 09:56:58:297AM	1031217004	Dmitri Mossessian	Plasma. Next shot - lower target nl 1e20 -> 0.8e20
Dec 17 2003 10:15:54:773AM	1031217005	Dmitri Mossessian	Plasma. Next shot - repeat trying to get steady RF
Dec 17 2003 10:36:15:360AM	1031217006	Dmitri Mossessian	Plasma. Next shot - repeat trying to get steady RF
Dec 17 2003 10:49:59:870AM	1031217007	Dmitri Mossessian	Plasma. Next shot -go to DN configuration. Import segment 4 from shot 2. Change Ar puff to 35 msec changed target nl to 0.8e20
Dec 17 2003 10:57:42:583AM	1031217008	Dmitri Mossessian	Plasma. Good double null. Next shot - repeat with better RF
Dec 17 2003 11:09:13:690AM	1031217009	Dmitri Mossessian	Plasma. Similar to shot 8 Next shot - lower target nl to 0.6e20
Dec 17 2003 11:29:18:307AM	1031217010	Dmitri Mossessian	Plasma. Next shot - repeat
Dec 17 2003 12:03:30:823PM	1031217011	Dmitri Mossessian	Plasma. Next shot - went to segment 2 - single null. Lowered nl in segment 2 to 0.6e20
Dec 17 2003 11:52:21:640AM	1031217012	Dmitri Mossessian	Plasma. Next shot - repeat
Dec 17 2003 12:04:25:090PM	1031217013	Dmitri Mossessian	Plasma. Next shot - change TF current in segment 2 to 147500 to be the same as in segment 4 Switched back to segment 4 to shot 11, double null
Dec 17 2003 12:17:30:867PM	1031217014	Dmitri Mossessian	Plasma. Next shot - nl up to 0.8 e20
Dec 17 2003 12:24:37:380PM	1031217015	Dmitri Mossessian	Plasma. Next shot - switch back to single null (segment 2), nl = 0.8e20
Dec 17 2003 12:43:23:560PM	1031217016	Dmitri Mossessian	Plasma. Next shot - loaded se3gment 2 from 1031211021 (higher upper triangularity) changed TF current and Ar to be as on shot 16. nl=0.8e20
Dec 17 2003 12:52:04:057PM	1031217017	Dmitri Mossessian	Plasma. Next shot - target nl up to 1e20
Dec 17 2003 01:05:12:830PM	1031217018	Dmitri Mossessian	Plasma. Next shot - repeat
Dec 17 2003 01:19:46:797PM	1031217019	Dmitri Mossessian	Plasma. First QC mode of the day Next shot - load segment 2 from shot 13. Change TF current to 147500. Target nl = 1e20
Dec 17 2003 01:32:35:120PM	1031217020	Dmitri Mossessian	Fizzle. Next shot - no changes
Dec 17 2003 01:46:47:927PM	1031217021	Dmitri Mossessian	Plasma. Upper delta 0.28 Next shot - go back to double null. Turn segment 4 on, change target nl to 1e20
Dec 17 2003 02:02:30:950PM	1031217022	Dmitri Mossessian	Plasma. Next shot - nl 1e20 -> 0.7e2
Dec 17 2003 02:27:11:450PM	1031217023	Dmitri Mossessian	Plasma. Next shot - add gas puff into H-mode from 0.71 sec. Turned off nl04 gain @ 0.71 s, change PG_3 to be 40 V from .71 to 1.1 sec
Dec 17 2003 02:29:09:403PM	1031217024	Dmitri Mossessian	Plasma. Next shot - raise gas puff into H-mode - PG_3 40 -> 65 V between .71 and 1.1 sec
Dec 17 2003 02:42:37:957PM	1031217025	Dmitri Mossessian	Plasma. Next shot - raise gas puff into H-mode - PG_3 65 -> 90 V between .71 and 1.1 sec
Dec 17 2003 02:51:56:413PM	1031217026	Dmitri Mossessian	Plasma. Next shot - turn gas puff off, nl feedback gain back on, nl target to 8e19
Dec 17 2003 03:06:55:357PM	1031217027	Dmitri Mossessian	Plasma. Next shot - repeat
Dec 17 2003 03:45:02:310PM	1031217028	Dmitri Mossessian	Plasma. TCI has problems - target nl is only 5e19. No RF data - CAMAC decoder problems. Next shot - repeat
Dec 17 2003 04:17:23:133PM	1031217028	Dmitri Mossessian	Action monitor problem in INIT phase led to no power shot. RF E-port is not working - motor drice problems.
Dec 17 2003 04:32:38:890PM	1031217030	Dmitri Mossessian	Plasma Next shot - no change
Dec 17 2003 04:42:06:423PM	1031217031	Dmitri Mossessian	Plasma Next shot - go to single null - turn on segment 2, nl -> 0.8e20
Dec 17 2003 04:53:06:567PM	1031217032	Dmitri Mossessian	Plasma Next shot - load segment 2 from shot 19, adjust TF current to 147500, target nl to 0.8e19
Dec 17 2003 05:02:27:650PM	1031217033	Dmitri Mossessian	Plasma

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:04:02:520AM	Plasma	Ok
2	09:17:21:653AM	Plasma	Ok
3	09:31:53:367AM	Plasma	Ok
4	09:52:06:717AM	Plasma	Ok
5	10:10:01:570AM	Plasma	Ok
6	10:23:07:923AM	Plasma	Ok
7	10:36:41:060AM	Plasma	Ok
8	10:50:49:070AM	Plasma	Ok
9	11:03:45:363AM	Plasma	Ok
10	11:16:13:310AM	Plasma	Ok
11	11:29:01:070AM	Plasma	Ok
12	11:42:36:503AM	Plasma	Ok
13	11:55:16:937AM	Plasma	Ok
14	12:07:41:963PM	Plasma	Ok
15	12:20:29:303PM	Plasma	Ok
16	12:33:00:487PM	Plasma	Ok
17	12:45:29:213PM	Plasma	Ok
18	12:58:53:380PM	Plasma	Ok
19	01:11:27:673PM	Plasma	Ok
20	01:26:11:527PM	Plasma	Ok
21	01:38:32:087PM	Plasma	Ok
22	01:51:11:267PM	Plasma	Ok
23	02:05:46:260PM	Plasma	Ok
24	02:19:26:117PM	Plasma	Ok
25	02:32:03:983PM	Plasma	Ok
26	02:44:54:253PM	Plasma	Ok
27	02:57:16:227PM	Plasma	Ok
28	03:26:45:600PM	Plasma	Ok
30	04:21:50:510PM	Plasma	Ok
31	04:34:12:873PM	Plasma	Ok
32	04:47:20:490PM	Plasma	Ok
33	05:00:08:930PM	Plasma	Ok