Alcator C-Mod Run 1020924 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: Steve Wukitch (shots 2-33)

Operators
Session leader(s):	Steve Wukitch
Physics operator(s):	Dmitri Mossessian
Engineering operator(s):	Unknown

Engineering Operator Run Comment
ICRF Studies. Wukitch/Mossessian

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:30:570PM

Author: To Be Determined

Engineering setup for 1020924

ICRF studies

Session leader: S. Wukitch
PO D. Mossessian

Power systems the same as shot 1020920020 Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC)
fill C-side with 30 psi D2 Hybrid enabled (PG3)
leave J-Bottom as is Hybrid DISABLED (PG5)

Enable the following gate valves, assuming no vacuum problems:
ECE, VUV, DNB
------------------------------------------------------------------
Shotnumbers not listed are either duds, fizzles or tests

009 BT~5.4T, I~1 MA, nl04~1
D: 0.75 MW [0.5,0.9]sec
E: 0.75 MW [0.9,1.3]sec
J: 1.0 MW [0.9,1.3]sec
result: plasma - H-modes
D: 0.8 MW clean
E: no gate
J: 0.8 MW poor match
note: tested E-port into dummy load and it was fine
010 BT~5.4T, I~1 MA, nl04~1
D: 1.0 MW [0.5,0.9]sec
E: 0.75 MW [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 1.0 MW clean
E: no gate - transmitter node is off in the tree
J: 1.4 MW faulting
011 BT~5.4T, I~1 MA, nl04~1
D: 1.25 MW [0.5,0.9]sec
E: 0.75 MW [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 1.2 MW clean
E: no gate - bira node is off in the tree
J: 1.4 MW faulting
013 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW [0.5,0.9]sec
E: 1.0 MW ramp [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 1.4 MW couple of faults
E: 1.0 MW 1 fault
J: 1.4 MW 1 fault
014 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW [0.5,0.9]sec
E: 1.4 MW ramp [0.9,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-modes
D: 1.4 MW 1 fault
E: 1.4 MW 1 fault
J: 1.4 MW 1 fault
016 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW ramp [0.6,1.3]sec
E: 1.4 MW ramp [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode -early disruption ~1 sec
D: 1.0 MW clean
E: 1.0 MW clean
J: 0
019 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW ramp [0.6,1.3]sec
E: 1.4 MW ramp [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode -early disruption ~1 sec
D: 1.2 MW clean
E: 1.2 MW 1 fault
J: 0
021 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW ramp [0.6,1.3]sec
E: 1.4 MW ramp [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode -early disruption ~1 sec
D: 1.2 MW clean
E: 1.2 MW 1 fault
J: 0
023 BT~5.4T, I~1 MA, nl04~1
D: 0.75 MW [0.6,1.3]sec
E: 0.75 MW [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - L-mode
D: 0.75 MW clean
E: 0.75 MW clean
J: 1.5 MW 1 fault
025 BT~5.4T, I~1 MA, nl04~1
D: 1.1 MW ramp [0.6,1.3]sec
E: 1.1 MW ramp [0.6,1.3]sec
J: 1.5 MW ramp [1.3,1.5]sec
result: plasma - H-mode late
D: 1.1 MW clean
E: 1.1 MW clean
J: 1.5 MW 3 faults
026 BT~5.4T, I~1 MA, nl04~1
D: 1.3 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.3 MW clean
E: 1.3 MW 4 faults
J: 1.5 MW 5 faults
027 BT~5.4T, I~1 MA, nl04~1
D: 1.3 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.3 MW 3 faults
E: 1.3 MW 6 faults
J: 1.2 MW 3 faults
029 BT~5.4T, I~1 MA, nl04~1
D: 1.3 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.3 MW 3 faults
E: 1.3 MW 8 faults
J: 1.2 MW 3 faults
031 BT~5.4T, I~1 MA, nl04~1
D: 1.5 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.5 MW 3 faults
E: 1.3 MW 9 faults
J: 1.2 MW 3 faults
032 BT~5.4T, I~1 MA, nl04~1
D: 1.5 MW [0.6,1.3]sec
E: 1.0 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.5 MW clean
E: 1.0 MW 4 faults
J: 1.2 MW 4 faults

Summary:

Plasma performance changed during the run. Discharges went into
H-mode at low RF power levels in the early discharges (see 009 and
010). Later in the day, Pth was ~1.8 MW. The radiation according to
both the twopi_diode and twopi_foil were about the same. The target
densities and plasma current were the same. The only shape change was
the lower triangularity was lowered from 0.6 for discharges before
1020924021 and <0.5 for the later discharges. The H/H+D rose from 3%
early in the day to 6-8% by the end of the day. The D and E antennas
had difficulty operating at high power when overlapped late the day
026-032. Analysis of the unfiltered DC1 power did reveal any
particular insight into the suspected interaction.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:16:240PM

Author: To Be Determined

Physop summary for 1020924.

ICRF studies.

SL. S. Wukitch

PO D. Mossessian

Summary:

Run started with a series of test shots. The first three plasma attempts (shots 6,7,8) resulted in duds.
Doing ECDC between shots and moving sparker breakdown 200 ms earlier helped, and the following run was
an endless and rather fruitless battle with fizzles. None of the field tweaks produced a desirable result.
When RF was ramped up to 2 MW a series of disruptions followed. It was suspected that the broken
tile in the divertor was causing the disruptions and we tryed to move the strike point farther out
to avoid hitting the tile. It seemed to work - we had no disruptions after shot 22 when we moved lower
triangularity to 0.5.

Total:

33 shots

4 tests
2 init failure
9 fizzles
3 duds
15 plasmas

Details:

---------------------------------------------------------------------------
1020924003 mossessian PHYSICS_OPERATOR Sep 24 2002 9:01:29:263AM
. . . . . . . . . . . . . . . . . . . .
First three shots are tests
----------------------------------------------------------------------------
1020924004 mossessian PHYSICS_OPERATOR Sep 24 2002 9:21:36:913AM
. . . . . . . . . . . . . . . . . . . .
Test again
----------------------------------------------------------------------------
1020924007 mossessian PHYSICS_OPERATOR Sep 24 2002 10:24:59:860AM
. . . . . . . . . . . . . . . . . . . .
Dud.

For next shot - fill to 20 ms, Br offset 0.5 mT down to 1.5 mT
----------------------------------------------------------------------------
1020924006 mossessian PHYSICS_OPERATOR Sep 24 2002 10:25:07:770AM
. . . . . . . . . . . . . . . . . . . .
Dud.

For next shot - IC_EF4 -1330 -> -1320, fill 23 -> 28 ms
----------------------------------------------------------------------------
1020924005 mossessian PHYSICS_OPERATOR Sep 24 2002 10:25:23:270AM
. . . . . . . . . . . . . . . . . . . .
Init failure. No power cycle
----------------------------------------------------------------------------
1020924008 mossessian PHYSICS_OPERATOR Sep 24 2002 10:42:00:910AM
. . . . . . . . . . . . . . . . . . . .
Dud.

Next shot - Br offset back to 2 mT. TRy ECDC between shots.
----------------------------------------------------------------------------
1020924009 mossessian PHYSICS_OPERATOR Sep 24 2002 11:01:58:776AM
. . . . . . . . . . . . . . . . . . . .
PLasma. The sparker was started 200 ms earlier for higher voltage. ECDC ran for 5 min between shots.

Next shot - keep ECDCing for 5 min between shots. Drop gas to 18 ms.
----------------------------------------------------------------------------
1020924010 mossessian PHYSICS_OPERATOR Sep 24 2002 11:20:01:170AM
. . . . . . . . . . . . . . . . . . . .
PLasma. Current rise is still low.

Next shot - drop fill to 16 ms.
----------------------------------------------------------------------------
1020924011 mossessian PHYSICS_OPERATOR Sep 24 2002 11:48:47:273AM
. . . . . . . . . . . . . . . . . . . .
PLasma.

Next shot - no changes
----------------------------------------------------------------------------
1020924012 mossessian PHYSICS_OPERATOR Sep 24 2002 12:18:07:626PM
. . . . . . . . . . . . . . . . . . . .
No power shot.
----------------------------------------------------------------------------
1020924013 mossessian PHYSICS_OPERATOR Sep 24 2002 12:29:41:350PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - no ECDC between. Fill to 22 ms.
----------------------------------------------------------------------------
1020924014 mossessian PHYSICS_OPERATOR Sep 24 2002 12:34:58:610PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Nice startup.

Next shot - no changes
----------------------------------------------------------------------------
1020924015 mossessian PHYSICS_OPERATOR Sep 24 2002 12:52:08:490PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. No enough gas.

Next shot- fill to 27 ms.
----------------------------------------------------------------------------
1020924016 mossessian PHYSICS_OPERATOR Sep 24 2002 1:09:47:273PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - IC_EF4 -1320 -> -1310.
----------------------------------------------------------------------------
1020924017 mossessian PHYSICS_OPERATOR Sep 24 2002 1:18:58:620PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Next shot - IC_EF4 -back to -1320. Fill up to 29 ms
----------------------------------------------------------------------------
1020924018 mossessian PHYSICS_OPERATOR Sep 24 2002 1:39:10:186PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Next shot - IC_EF4 -down to -1330.
----------------------------------------------------------------------------
1020924019 mossessian PHYSICS_OPERATOR Sep 24 2002 1:58:24:913PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupts at 1s. Looks like lower outer strike point is too far in - too close to the tile, perhaps.

Next shot - RXL from -0.012 to 0. in segment 2.
----------------------------------------------------------------------------
1020924020 mossessian PHYSICS_OPERATOR Sep 24 2002 2:06:46:116PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Next shot - RCUR @ 0.001 s 0.66 -> 0.67
----------------------------------------------------------------------------
1020924021 mossessian PHYSICS_OPERATOR Sep 24 2002 2:23:18:896PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupts badly at ~ 1s.

Next shot - RXL 0 -> 0.01 in segment 2
----------------------------------------------------------------------------
1020924022 mossessian PHYSICS_OPERATOR Sep 24 2002 2:31:57:103PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Next shot - no changes
----------------------------------------------------------------------------
1020924023 mossessian PHYSICS_OPERATOR Sep 24 2002 2:46:17:880PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - no changes
----------------------------------------------------------------------------
1020924024 mossessian PHYSICS_OPERATOR Sep 24 2002 3:28:32:256PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Next shot - Br offset down to 1.5 mT
----------------------------------------------------------------------------
1020924025 mossessian PHYSICS_OPERATOR Sep 24 2002 3:29:38:650PM
. . . . . . . . . . . . . . . . . . . .
Plasma

Next shot - no changes
----------------------------------------------------------------------------
1020924026 mossessian PHYSICS_OPERATOR Sep 24 2002 3:29:42:773PM
. . . . . . . . . . . . . . . . . . . .
Plasma

Next shot - no changes
----------------------------------------------------------------------------
1020924027 mossessian PHYSICS_OPERATOR Sep 24 2002 3:40:48:670PM
. . . . . . . . . . . . . . . . . . . .
Plasma

Next shot - no changes
----------------------------------------------------------------------------
1020924028 mossessian PHYSICS_OPERATOR Sep 24 2002 3:56:24:530PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

Next shot - pull RCUR in segment 1 out.
----------------------------------------------------------------------------
1020924029 mossessian PHYSICS_OPERATOR Sep 24 2002 4:06:52:066PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - ICEF4 down -1330 -> -1335
----------------------------------------------------------------------------
1020924030 mossessian PHYSICS_OPERATOR Sep 24 2002 4:27:55:760PM
. . . . . . . . . . . . . . . . . . . .
Fizzle..

Next shot - ICEF4 back to -1325. Br offset down to 1 mT
----------------------------------------------------------------------------
1020924032 mossessian PHYSICS_OPERATOR Sep 24 2002 4:47:56:676PM
. . . . . . . . . . . . . . . . . . . .
Plasma.

Next shot - fill 23 -> 28 ms
----------------------------------------------------------------------------
1020924031 mossessian PHYSICS_OPERATOR Sep 24 2002 4:48:09:283PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Very bad startup.

Next shot - load segment 1 from 1020920020
----------------------------------------------------------------------------
1020924033 mossessian PHYSICS_OPERATOR Sep 24 2002 5:01:12:200PM
. . . . . . . . . . . . . . . . . . . .
Fizzle.

----------------------------------------------------------------------------
1020924xxx mossessian PHYSICS_OPERATOR Sep 24 2002 9:01:15:263AM
. . . . . . . . . . . . . . . . . . . .
Run 1020924

ICRF studies

Session leader: S. Wukitch
PO D. Mossessian

Power systems the same as shot 1020920020 Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC)
fill C-side with 30 psi D2 Hybrid enabled (PG3)
leave J-Bottom as is Hybrid DISABLED (PG5)

Coldstart at 8:50 - OK

Load shot 1020920020

Session Leader Comments

Sep 24 2002 11:17:27:713AM 1020924009 Steve Wukitch 009 BT~5.4T, I~1 MA, nl04~1
D: 0.75 MW [0.5,0.9]sec
E: 0.75 MW [0.9,1.3]sec
J: 1.0 MW [0.9,1.3]sec
result: plasma - H-modes
D: 0.8 MW clean
E: no gate
J: 0.8 MW poor match

Sep 24 2002 11:18:25:137AM 1020924010 Steve Wukitch 010 BT~5.4T, I~1 MA, nl04~1
D: 1.0 MW [0.5,0.9]sec
E: 0.75 MW [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 0.8 MW clean
E: no gate - node is off in the tree
J: 1.4 MW faulting

Sep 24 2002 12:29:56:697PM 1020924011 Steve Wukitch 011 BT~5.4T, I~1 MA, nl04~1
D: 1.25 MW [0.5,0.9]sec
E: 0.75 MW [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 1.2 MW clean
E: no gate - bira node is off in the tree
J: 1.4 MW faulting

Sep 24 2002 12:29:43:117PM 1020924013 Steve Wukitch 013 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW [0.5,0.9]sec
E: 1.0 MW ramp [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 1.4 MW couple of faults
E: 1.0 MW 1 fault
J: 1.4 MW 1 fault

Sep 24 2002 01:42:33:943PM 1020924013 Steve Wukitch 013 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW [0.5,0.9]sec
E: 1.0 MW ramp [0.9,1.3]sec
J: 1.4 MW [0.9,1.3]sec
result: plasma - H-modes
D: 1.4 MW couple of faults
E: 1.0 MW 1 fault
J: 1.4 MW 1 fault

Sep 24 2002 01:42:43:087PM 1020924014 Steve Wukitch 014 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW [0.5,0.9]sec
E: 1.4 MW ramp [0.9,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-modes
D: 1.4 MW 1 fault
E: 1.4 MW 1 fault
J: 1.4 MW 1 fault

Sep 24 2002 01:43:01:693PM 1020924016 Steve Wukitch 016 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW ramp [0.6,1.3]sec
E: 1.4 MW ramp [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode -early disruption ~1 sec
D: 1.0 MW clean
E: 1.0 MW clean
J: 0

Sep 24 2002 02:46:19:240PM 1020924019 Steve Wukitch 019 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW ramp [0.6,1.3]sec
E: 1.4 MW ramp [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode -early disruption ~1 sec
D: 1.2 MW clean
E: 1.2 MW 1 fault
J: 0

Sep 24 2002 02:50:54:263PM 1020924021 Steve Wukitch 021 BT~5.4T, I~1 MA, nl04~1
D: 1.4 MW ramp [0.6,1.3]sec
E: 1.4 MW ramp [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode -early disruption ~1 sec
D: 1.2 MW clean
E: 1.2 MW 1 fault
J: 0

Sep 24 2002 02:51:18:780PM 1020924023 Steve Wukitch 023 BT~5.4T, I~1 MA, nl04~1
D: 0.75 MW [0.6,1.3]sec
E: 0.75 MW [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - L-mode
D: 0.75 MW clean
E: 0.75 MW clean
J: 1.5 MW 1 fault

Sep 24 2002 03:18:52:473PM 1020924025 Steve Wukitch 025 BT~5.4T, I~1 MA, nl04~1
D: 1.1 MW ramp [0.6,1.3]sec
E: 1.1 MW ramp [0.6,1.3]sec
J: 1.5 MW ramp [1.3,1.5]sec
result: plasma - H-mode late
D: 1.1 MW clean
E: 1.1 MW clean
J: 1.5 MW 3 faults

Sep 24 2002 03:24:38:703PM 1020924026 Steve Wukitch 026 BT~5.4T, I~1 MA, nl04~1
D: 1.3 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.5 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.3 MW clean
E: 1.3 MW 4 faults
J: 1.5 MW 5 faults

Sep 24 2002 03:52:23:943PM 1020924027 Steve Wukitch 027 BT~5.4T, I~1 MA, nl04~1
D: 1.3 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.3 MW 3 faults
E: 1.3 MW 6 faults
J: 1.2 MW 3 faults

Sep 24 2002 04:51:04:260PM 1020924029 Steve Wukitch 029 BT~5.4T, I~1 MA, nl04~1
D: 1.3 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.3 MW 3 faults
E: 1.3 MW 8 faults
J: 1.2 MW 3 faults

Sep 24 2002 04:51:42:057PM 1020924031 Steve Wukitch 031 BT~5.4T, I~1 MA, nl04~1
D: 1.5 MW [0.6,1.3]sec
E: 1.3 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode late
D: 1.5 MW 3 faults
E: 1.3 MW 9 faults
J: 1.2 MW 3 faults

Sep 24 2002 04:52:11:120PM 1020924032 Steve Wukitch 032 BT~5.4T, I~1 MA, nl04~1
D: 1.5 MW [0.6,1.3]sec
E: 1.0 MW [0.6,1.3]sec
J: 1.2 MW [1.3,1.5]sec
result: plasma - H-mode
D: 1.5 MW clean
E: 1.0 MW 4 faults
J: 1.2 MW 4 faults

Physics Operator Comments

Sep 24 2002 09:01:15:263AM Dmitri Mossessian Run 1020924

ICRF studies

Session leader: S. Wukitch
PO D. Mossessian

Power systems the same as shot 1020920020 Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC)
fill C-side with 30 psi D2 Hybrid enabled (PG3)
leave J-Bottom as is Hybrid DISABLED (PG5)

Coldstart at 8:50 - OK

Load shot 1020920020

Sep 24 2002 09:01:29:263AM 1020924003 Dmitri Mossessian First three shots are tests

Sep 24 2002 09:21:36:913AM 1020924004 Dmitri Mossessian Test again

Sep 24 2002 10:25:23:270AM 1020924005 Dmitri Mossessian Init failure. No power cycle

Sep 24 2002 10:25:07:770AM 1020924006 Dmitri Mossessian Dud.

For next shot - IC_EF4 -1330 -> -1320, fill 23 -> 28 ms

Sep 24 2002 10:24:59:860AM 1020924007 Dmitri Mossessian Dud.

For next shot - fill to 20 ms, Br offset 0.5 mT down to 1.5 mT

Sep 24 2002 10:42:00:910AM 1020924008 Dmitri Mossessian Dud.

Next shot - Br offset back to 2 mT. TRy ECDC between shots.

Sep 24 2002 11:01:58:777AM 1020924009 Dmitri Mossessian PLasma. The sparker was started 200 ms earlier for higher voltage. ECDC ran for 5 min between shots.

Next shot - keep ECDCing for 5 min between shots. Drop gas to 18 ms.

Sep 24 2002 11:20:01:170AM 1020924010 Dmitri Mossessian PLasma. Current rise is still low.

Next shot - drop fill to 16 ms.

Sep 24 2002 11:48:47:273AM 1020924011 Dmitri Mossessian PLasma.

Next shot - no changes

Sep 24 2002 12:18:07:627PM 1020924012 Dmitri Mossessian No power shot.

Sep 24 2002 12:29:41:350PM 1020924013 Dmitri Mossessian Plasma.

Next shot - no ECDC between. Fill to 22 ms.

Sep 24 2002 12:34:58:610PM 1020924014 Dmitri Mossessian Plasma. Nice startup.

Next shot - no changes

Sep 24 2002 12:52:08:490PM 1020924015 Dmitri Mossessian Fizzle. No enough gas.

Next shot- fill to 27 ms.

Sep 24 2002 01:09:47:273PM 1020924016 Dmitri Mossessian Plasma.

Next shot - IC_EF4 -1320 -> -1310.

Sep 24 2002 01:18:58:620PM 1020924017 Dmitri Mossessian Fizzle.

Next shot - IC_EF4 -back to -1320. Fill up to 29 ms

Sep 24 2002 01:39:10:187PM 1020924018 Dmitri Mossessian Fizzle.

Next shot - IC_EF4 -down to -1330.

Sep 24 2002 01:58:24:913PM 1020924019 Dmitri Mossessian Plasma. Disrupts at 1s. Looks like lower outer strike point is too far in - too close to the tile, perhaps.

Next shot - RXL from -0.012 to 0. in segment 2.

Sep 24 2002 02:06:46:117PM 1020924020 Dmitri Mossessian Fizzle.

Next shot - RCUR @ 0.001 s 0.66 -> 0.67

Sep 24 2002 02:23:18:897PM 1020924021 Dmitri Mossessian Plasma. Disrupts badly at ~ 1s.

Next shot - RXL 0 -> 0.01 in segment 2

Sep 24 2002 02:31:57:103PM 1020924022 Dmitri Mossessian Fizzle.

Next shot - no changes

Sep 24 2002 02:46:17:880PM 1020924023 Dmitri Mossessian Plasma.

Next shot - no changes

Sep 24 2002 03:28:32:257PM 1020924024 Dmitri Mossessian Fizzle.

Next shot - Br offset down to 1.5 mT

Sep 24 2002 03:29:38:650PM 1020924025 Dmitri Mossessian Plasma

Next shot - no changes

Sep 24 2002 03:29:42:773PM 1020924026 Dmitri Mossessian Plasma

Next shot - no changes

Sep 24 2002 03:40:48:670PM 1020924027 Dmitri Mossessian Plasma

Next shot - no changes

Sep 24 2002 03:56:24:530PM 1020924028 Dmitri Mossessian Fizzle.

Next shot - pull RCUR in segment 1 out.

Sep 24 2002 04:06:52:067PM 1020924029 Dmitri Mossessian Plasma.

Next shot - ICEF4 down -1330 -> -1335

Sep 24 2002 04:27:55:760PM 1020924030 Dmitri Mossessian Fizzle..

Next shot - ICEF4 back to -1325. Br offset down to 1 mT

Sep 24 2002 04:48:09:283PM 1020924031 Dmitri Mossessian Plasma. Very bad startup.

Next shot - load segment 1 from 1020920020

Sep 24 2002 04:47:56:677PM 1020924032 Dmitri Mossessian Plasma.

Next shot - fill 23 -> 28 ms

Sep 24 2002 05:01:12:200PM 1020924033 Dmitri Mossessian Fizzle.

Engineering Operator Comments

Shot Time Type Status Comment

2 08:41:34:897AM Test Ok Test Shot "MHD Antenna Test"

3 08:57:09:427AM Test Ok

4 09:10:52:407AM Test Ok

6 09:57:41:717AM Plasma Ok

7 10:14:52:403AM Plasma Ok

8 10:27:46:587AM Plasma Ok

9 10:50:13:427AM Plasma Ok

10 11:10:45:090AM Plasma Ok

11 11:40:15:163AM Plasma Ok

12 12:02:16:720PM Plasma Bad I2T FAult

13 12:18:47:690PM Plasma Ok

14 12:32:10:077PM Plasma Ok

15 12:46:35:633PM Plasma Ok

16 12:59:48:347PM Plasma Ok

17 01:13:02:793PM Plasma Ok

18 01:28:14:400PM Plasma Ok

19 01:41:26:333PM Plasma Ok

20 01:58:15:113PM Plasma Ok

21 02:11:16:813PM Plasma Ok

22 02:24:45:243PM Plasma Ok

23 02:37:46:940PM Plasma Ok

24 02:50:39:950PM Plasma Ok

25 03:03:42:427PM Plasma Ok

26 03:17:24:627PM Plasma Ok

27 03:34:22:940PM Plasma Ok

28 03:48:08:543PM Plasma Ok

29 04:01:06:477PM Plasma Ok

30 04:14:26:283PM Plasma Ok

31 04:29:45:763PM Plasma Ok

32 04:42:55:023PM Plasma Ok

33 04:58:46:603PM Plasma Ok

Session Leader Comments
Sep 24 2002 11:17:27:713AM	1020924009	Steve Wukitch	009 BT~5.4T, I~1 MA, nl04~1 D: 0.75 MW [0.5,0.9]sec E: 0.75 MW [0.9,1.3]sec J: 1.0 MW [0.9,1.3]sec result: plasma - H-modes D: 0.8 MW clean E: no gate J: 0.8 MW poor match
Sep 24 2002 11:18:25:137AM	1020924010	Steve Wukitch	010 BT~5.4T, I~1 MA, nl04~1 D: 1.0 MW [0.5,0.9]sec E: 0.75 MW [0.9,1.3]sec J: 1.4 MW [0.9,1.3]sec result: plasma - H-modes D: 0.8 MW clean E: no gate - node is off in the tree J: 1.4 MW faulting
Sep 24 2002 12:29:56:697PM	1020924011	Steve Wukitch	011 BT~5.4T, I~1 MA, nl04~1 D: 1.25 MW [0.5,0.9]sec E: 0.75 MW [0.9,1.3]sec J: 1.4 MW [0.9,1.3]sec result: plasma - H-modes D: 1.2 MW clean E: no gate - bira node is off in the tree J: 1.4 MW faulting
Sep 24 2002 12:29:43:117PM	1020924013	Steve Wukitch	013 BT~5.4T, I~1 MA, nl04~1 D: 1.4 MW [0.5,0.9]sec E: 1.0 MW ramp [0.9,1.3]sec J: 1.4 MW [0.9,1.3]sec result: plasma - H-modes D: 1.4 MW couple of faults E: 1.0 MW 1 fault J: 1.4 MW 1 fault
Sep 24 2002 01:42:33:943PM	1020924013	Steve Wukitch	013 BT~5.4T, I~1 MA, nl04~1 D: 1.4 MW [0.5,0.9]sec E: 1.0 MW ramp [0.9,1.3]sec J: 1.4 MW [0.9,1.3]sec result: plasma - H-modes D: 1.4 MW couple of faults E: 1.0 MW 1 fault J: 1.4 MW 1 fault
Sep 24 2002 01:42:43:087PM	1020924014	Steve Wukitch	014 BT~5.4T, I~1 MA, nl04~1 D: 1.4 MW [0.5,0.9]sec E: 1.4 MW ramp [0.9,1.3]sec J: 1.5 MW [1.3,1.5]sec result: plasma - H-modes D: 1.4 MW 1 fault E: 1.4 MW 1 fault J: 1.4 MW 1 fault
Sep 24 2002 01:43:01:693PM	1020924016	Steve Wukitch	016 BT~5.4T, I~1 MA, nl04~1 D: 1.4 MW ramp [0.6,1.3]sec E: 1.4 MW ramp [0.6,1.3]sec J: 1.5 MW [1.3,1.5]sec result: plasma - H-mode -early disruption ~1 sec D: 1.0 MW clean E: 1.0 MW clean J: 0
Sep 24 2002 02:46:19:240PM	1020924019	Steve Wukitch	019 BT~5.4T, I~1 MA, nl04~1 D: 1.4 MW ramp [0.6,1.3]sec E: 1.4 MW ramp [0.6,1.3]sec J: 1.5 MW [1.3,1.5]sec result: plasma - H-mode -early disruption ~1 sec D: 1.2 MW clean E: 1.2 MW 1 fault J: 0
Sep 24 2002 02:50:54:263PM	1020924021	Steve Wukitch	021 BT~5.4T, I~1 MA, nl04~1 D: 1.4 MW ramp [0.6,1.3]sec E: 1.4 MW ramp [0.6,1.3]sec J: 1.5 MW [1.3,1.5]sec result: plasma - H-mode -early disruption ~1 sec D: 1.2 MW clean E: 1.2 MW 1 fault J: 0
Sep 24 2002 02:51:18:780PM	1020924023	Steve Wukitch	023 BT~5.4T, I~1 MA, nl04~1 D: 0.75 MW [0.6,1.3]sec E: 0.75 MW [0.6,1.3]sec J: 1.5 MW [1.3,1.5]sec result: plasma - L-mode D: 0.75 MW clean E: 0.75 MW clean J: 1.5 MW 1 fault
Sep 24 2002 03:18:52:473PM	1020924025	Steve Wukitch	025 BT~5.4T, I~1 MA, nl04~1 D: 1.1 MW ramp [0.6,1.3]sec E: 1.1 MW ramp [0.6,1.3]sec J: 1.5 MW ramp [1.3,1.5]sec result: plasma - H-mode late D: 1.1 MW clean E: 1.1 MW clean J: 1.5 MW 3 faults
Sep 24 2002 03:24:38:703PM	1020924026	Steve Wukitch	026 BT~5.4T, I~1 MA, nl04~1 D: 1.3 MW [0.6,1.3]sec E: 1.3 MW [0.6,1.3]sec J: 1.5 MW [1.3,1.5]sec result: plasma - H-mode late D: 1.3 MW clean E: 1.3 MW 4 faults J: 1.5 MW 5 faults
Sep 24 2002 03:52:23:943PM	1020924027	Steve Wukitch	027 BT~5.4T, I~1 MA, nl04~1 D: 1.3 MW [0.6,1.3]sec E: 1.3 MW [0.6,1.3]sec J: 1.2 MW [1.3,1.5]sec result: plasma - H-mode late D: 1.3 MW 3 faults E: 1.3 MW 6 faults J: 1.2 MW 3 faults
Sep 24 2002 04:51:04:260PM	1020924029	Steve Wukitch	029 BT~5.4T, I~1 MA, nl04~1 D: 1.3 MW [0.6,1.3]sec E: 1.3 MW [0.6,1.3]sec J: 1.2 MW [1.3,1.5]sec result: plasma - H-mode late D: 1.3 MW 3 faults E: 1.3 MW 8 faults J: 1.2 MW 3 faults
Sep 24 2002 04:51:42:057PM	1020924031	Steve Wukitch	031 BT~5.4T, I~1 MA, nl04~1 D: 1.5 MW [0.6,1.3]sec E: 1.3 MW [0.6,1.3]sec J: 1.2 MW [1.3,1.5]sec result: plasma - H-mode late D: 1.5 MW 3 faults E: 1.3 MW 9 faults J: 1.2 MW 3 faults
Sep 24 2002 04:52:11:120PM	1020924032	Steve Wukitch	032 BT~5.4T, I~1 MA, nl04~1 D: 1.5 MW [0.6,1.3]sec E: 1.0 MW [0.6,1.3]sec J: 1.2 MW [1.3,1.5]sec result: plasma - H-mode D: 1.5 MW clean E: 1.0 MW 4 faults J: 1.2 MW 4 faults

Physics Operator Comments
Sep 24 2002 09:01:15:263AM		Dmitri Mossessian	Run 1020924 ICRF studies Session leader: S. Wukitch PO D. Mossessian Power systems the same as shot 1020920020 Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Coldstart at 8:50 - OK Load shot 1020920020
Sep 24 2002 09:01:29:263AM	1020924003	Dmitri Mossessian	First three shots are tests
Sep 24 2002 09:21:36:913AM	1020924004	Dmitri Mossessian	Test again
Sep 24 2002 10:25:23:270AM	1020924005	Dmitri Mossessian	Init failure. No power cycle
Sep 24 2002 10:25:07:770AM	1020924006	Dmitri Mossessian	Dud. For next shot - IC_EF4 -1330 -> -1320, fill 23 -> 28 ms
Sep 24 2002 10:24:59:860AM	1020924007	Dmitri Mossessian	Dud. For next shot - fill to 20 ms, Br offset 0.5 mT down to 1.5 mT
Sep 24 2002 10:42:00:910AM	1020924008	Dmitri Mossessian	Dud. Next shot - Br offset back to 2 mT. TRy ECDC between shots.
Sep 24 2002 11:01:58:777AM	1020924009	Dmitri Mossessian	PLasma. The sparker was started 200 ms earlier for higher voltage. ECDC ran for 5 min between shots. Next shot - keep ECDCing for 5 min between shots. Drop gas to 18 ms.
Sep 24 2002 11:20:01:170AM	1020924010	Dmitri Mossessian	PLasma. Current rise is still low. Next shot - drop fill to 16 ms.
Sep 24 2002 11:48:47:273AM	1020924011	Dmitri Mossessian	PLasma. Next shot - no changes
Sep 24 2002 12:18:07:627PM	1020924012	Dmitri Mossessian	No power shot.
Sep 24 2002 12:29:41:350PM	1020924013	Dmitri Mossessian	Plasma. Next shot - no ECDC between. Fill to 22 ms.
Sep 24 2002 12:34:58:610PM	1020924014	Dmitri Mossessian	Plasma. Nice startup. Next shot - no changes
Sep 24 2002 12:52:08:490PM	1020924015	Dmitri Mossessian	Fizzle. No enough gas. Next shot- fill to 27 ms.
Sep 24 2002 01:09:47:273PM	1020924016	Dmitri Mossessian	Plasma. Next shot - IC_EF4 -1320 -> -1310.
Sep 24 2002 01:18:58:620PM	1020924017	Dmitri Mossessian	Fizzle. Next shot - IC_EF4 -back to -1320. Fill up to 29 ms
Sep 24 2002 01:39:10:187PM	1020924018	Dmitri Mossessian	Fizzle. Next shot - IC_EF4 -down to -1330.
Sep 24 2002 01:58:24:913PM	1020924019	Dmitri Mossessian	Plasma. Disrupts at 1s. Looks like lower outer strike point is too far in - too close to the tile, perhaps. Next shot - RXL from -0.012 to 0. in segment 2.
Sep 24 2002 02:06:46:117PM	1020924020	Dmitri Mossessian	Fizzle. Next shot - RCUR @ 0.001 s 0.66 -> 0.67
Sep 24 2002 02:23:18:897PM	1020924021	Dmitri Mossessian	Plasma. Disrupts badly at ~ 1s. Next shot - RXL 0 -> 0.01 in segment 2
Sep 24 2002 02:31:57:103PM	1020924022	Dmitri Mossessian	Fizzle. Next shot - no changes
Sep 24 2002 02:46:17:880PM	1020924023	Dmitri Mossessian	Plasma. Next shot - no changes
Sep 24 2002 03:28:32:257PM	1020924024	Dmitri Mossessian	Fizzle. Next shot - Br offset down to 1.5 mT
Sep 24 2002 03:29:38:650PM	1020924025	Dmitri Mossessian	Plasma Next shot - no changes
Sep 24 2002 03:29:42:773PM	1020924026	Dmitri Mossessian	Plasma Next shot - no changes
Sep 24 2002 03:40:48:670PM	1020924027	Dmitri Mossessian	Plasma Next shot - no changes
Sep 24 2002 03:56:24:530PM	1020924028	Dmitri Mossessian	Fizzle. Next shot - pull RCUR in segment 1 out.
Sep 24 2002 04:06:52:067PM	1020924029	Dmitri Mossessian	Plasma. Next shot - ICEF4 down -1330 -> -1335
Sep 24 2002 04:27:55:760PM	1020924030	Dmitri Mossessian	Fizzle.. Next shot - ICEF4 back to -1325. Br offset down to 1 mT
Sep 24 2002 04:48:09:283PM	1020924031	Dmitri Mossessian	Plasma. Very bad startup. Next shot - load segment 1 from 1020920020
Sep 24 2002 04:47:56:677PM	1020924032	Dmitri Mossessian	Plasma. Next shot - fill 23 -> 28 ms
Sep 24 2002 05:01:12:200PM	1020924033	Dmitri Mossessian	Fizzle.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
2	08:41:34:897AM	Test	Ok	Test Shot "MHD Antenna Test"
3	08:57:09:427AM	Test	Ok
4	09:10:52:407AM	Test	Ok
6	09:57:41:717AM	Plasma	Ok
7	10:14:52:403AM	Plasma	Ok
8	10:27:46:587AM	Plasma	Ok
9	10:50:13:427AM	Plasma	Ok
10	11:10:45:090AM	Plasma	Ok
11	11:40:15:163AM	Plasma	Ok
12	12:02:16:720PM	Plasma	Bad	I2T FAult
13	12:18:47:690PM	Plasma	Ok
14	12:32:10:077PM	Plasma	Ok
15	12:46:35:633PM	Plasma	Ok
16	12:59:48:347PM	Plasma	Ok
17	01:13:02:793PM	Plasma	Ok
18	01:28:14:400PM	Plasma	Ok
19	01:41:26:333PM	Plasma	Ok
20	01:58:15:113PM	Plasma	Ok
21	02:11:16:813PM	Plasma	Ok
22	02:24:45:243PM	Plasma	Ok
23	02:37:46:940PM	Plasma	Ok
24	02:50:39:950PM	Plasma	Ok
25	03:03:42:427PM	Plasma	Ok
26	03:17:24:627PM	Plasma	Ok
27	03:34:22:940PM	Plasma	Ok
28	03:48:08:543PM	Plasma	Ok
29	04:01:06:477PM	Plasma	Ok
30	04:14:26:283PM	Plasma	Ok
31	04:29:45:763PM	Plasma	Ok
32	04:42:55:023PM	Plasma	Ok
33	04:58:46:603PM	Plasma	Ok