Alcator C-Mod Run 1010724 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: Steve Wukitch (shots 1-18)

Miniproposal: 298a

Date Filed: 5/20/2002

Title: C-Mod Plasma Startup

First Author: Jim Irby

Session Leader: John Rice (shots 1-18)

Operators
Session leader(s):	Steve Wukitch,John Rice
Physics operator(s):	Joseph Snipes
Engineering operator(s):	Bill Cochran

Engineering Operator Run Comment
Continuing MP289A Double Barrier. Wukitch/Snipes/Cochran.

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:27:790PM

Author: To Be Determined

Session Leader Run Summary for 1010724 MP289A Double Barrier Studies

All plasmas had double barriers from D and E antennas, with J antenna
available with a variety of delay times and power levels. Several
discharges demonstrated barrier arrest: 7, 10, 11, 17 and 18, but all
at a similar density/delay time with respect to D and E timing.
Unfortunatley the run ended early due to temperature related CAMAC problems.
Again, several plasmas suffered H-L transitions which destroyed the ITBs.
Shot 10 looked very promising, with 1.5 MW from J-port, and substantial core
heating and rotation.

Entered: Jul 7 2004 03:49:27:803PM

Author: To Be Determined

Run Plan and ENGINEERING SETUP FOR Tuesday 1010724

Continuing MP289A Double Barrier
SL: Rice, Wukitch
PO: Snipes

ECDC in D2 overnight stopping two hours before the run

RUN BEGINS AT 9:00 AND ENDS AT 5:00

Power systems the same as for shot 1010718004

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)
fill J-Bottom with 6 psi He Hybrid DISABLED(PG5)
Enable the following gate valves, assuming no vacuum problems:
ECE, DNB, VUV

RF STATUS:

XMTR 1 AND 2, RUN-ON STARTED AT 8:00 AM
XMTR 3 AND 4, RUN-ON STARTED AT 8:00 AM

RUN PLAN:

MP289A ITB studies starting from 1010718004 and running constant
discharges varying only the timing and power level of the J-port 70
MHz ICRF to attempt to arrest the peaking due to the ITB and determine
how best to control it. In the event of J-port RF problems, we will
do an Ip scan down to 0.6 MA and then up to 1.0 MA to determine the
effects on the foot of the ITB.

001
request:
reload from 1010718004
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.25,1.5]

result:
nice shot
target nl_04~0.95
clean RF

next shot: repeat

002
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.25,1.5]

result: good shot
multiple H-mode transitions
target nl_04~0.95
late RF trips

next shot: repeat with 70 MHz @ [1.1,1.5]002

003
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.1,1.5]

result: non-starter

004
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.1,1.5]

result: good shot
multiple H-modes
clean RF

next shot: repeat with 70 MHz @[0.9,1.5]

005
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [0.9,1.5]

result: good shot
multiple H-modes
fault at H->L , nice H->L EN-mode

next shot: repeat with 70 MHz higher power (0.9 MW)

006
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.9 MW [0.9,1.5]

result: -

007
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.9 MW [0.9,1.5]

result: good shot
multiple H-modes
late fault on E otherwise clean

next shot: repeat with 70 MHz higher power (1.5 MW)

008
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.5 MW [0.9,1.5]

result: -

next shot: repeat with Ip~0.7 MA

009 no power pulse

010

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.5 MW [0.9,1.5]

result: plasma early disruption
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.1]
70 MHz power: 1.5 MW [0.9,1.1]
injection from J killed the plasma

next shot: repeat 70 MHz power: 1. MW [0.9,1.5]

011

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.5]

result: plasma
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.4] faults

next shot: repeat 70 MHz power: 1. MW [1.1,1.5]

012

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.1,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
multiple transitions
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.1,1.35] faults

next shot: repeat with less faults from J

013

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
multiple transitions
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.3] faults

next shot: repeat

014

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
multiple transitions
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.5]

next shot: repeat with 70 MHz @1.0 MW [.7,1.5]

015

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.7,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA - no itb
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.7,1.5]

next shot: repeat with 70 MHz @1.0 MW [.8,1.5]

016

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.8,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA w/o ITB
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.8,1.5]

next shot: repeat with 70 MHz @1.0 MW [.9,1.5]

017

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA+ITB
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.9,1.5]

next shot: repeat

018

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA+ITB
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.9,1.5]

next shot: repeat with 70 MHz power: 1.0 MW [.95,1.5]

Summary

All plasmas had double barriers from D and E antennas, with J antenna
available with a variety of delay times and power levels. Several
discharges demonstrated barrier arrest: 7, 10, 11, 17 and 18, but all
at a similar density/delay time with respect to D and E timing.
Unfortunatley the run ended early due to temperature related CAMAC
problems. Again, several plasmas suffered H-L transitions which
destroyed the ITBs. Shot 10 looked very promising, with 1.5 MW from
J-port, and substantial core heating and rotation.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:14:130PM

Author: To Be Determined

Run Plan and ENGINEERING SETUP FOR Tuesday 1010724

Continuing MP289A Double Barrier
SL: Rice, Wukitch
PO: Snipes

ECDC in D2 overnight stopping two hours before the run

RUN BEGINS AT 9:00 AND ENDS AT 5:00

Power systems the same as for shot 1010718004

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)
fill J-Bottom with 6 psi He Hybrid DISABLED(PG5)
Enable the following gate valves, assuming no vacuum problems:
ECE, DNB, VUV

RF STATUS:

XMTR 1 AND 2, RUN-ON STARTED AT 8:00 AM
XMTR 3 AND 4, RUN-ON STARTED AT 8:00 AM

RUN PLAN:

MP289A ITB studies starting from 1010718004 and running constant discharges
varying only the timing and power level of the J-port 70 MHz ICRF to attempt to
arrest the peaking due to the ITB and determine how best to control it.
In the event of J-port RF problems, we will do an Ip scan down to 0.6 MA and
then up to 1.0 MA to determine the effects on the foot of the ITB.

Summary:
Out of 18 attempts, we got 14 good plasmas, 2 fizzles and one dud. All of the
good plasmas had EDA H-modes with varying degrees of ITB's. Some were quite
long EDA's with strong density peaking (shots 1, 15 - 18). The ICRF ran well
with combined power from D, E and J up to 3 MW steady for up to 0.8 s long.
However, we were plagued with a series of small problems requiring cell access
throughout the morning including D alpha, TCI, and TF scanner problems. There
were also a number of CAMAC failures and data system failures. Shot 1010724018
failed to take all of the data and hung the data system. An attempt at another
shot hung the data system in INIT and at that point we ended the run. The 90
degree temperatures outside and inside the cell may have been the cause of some
of these failures.

Shot 1: Copied shot 1010718004. Changed prepuff from 23 to 25 ms duration, but
left Br0 at +2 mT and EF4 at -1300 A. Copied EFC waveform from Segment
2 of shot 1010723024 into both segments 1 and 2 as suggested in an
e-mail from Wolfe yesterday. Good shot. Long EDA.
Shot 2: Startup on shot 1 did not look good. Increased prepuff to 28 ms
duration, decreased Br0 by 0.25 mT to 1.75 mT. Increased EF4 current
back to its more typical -1290 A. Loaded into model. Good shot.
Shot 3: Startup was worse on shot 2! Try reducing prepuff again to 26 ms and
once again increase EF4 to -1280 A. Br0 looked O.K. on shot 2. Dud!
Shot 4: It seems that Bz0 is still too negative. Increase EF4 current to
-1270 A. Increase Br0 to 2.5 mT. Try again. Good shot.
Shot 5: Br0 and Bz0 were higher than on previous days, but the current rise
looks good, so I'll leave it for now. Good shot.
Shot 6: Started ECDC for 10 minutes just before shot 6 to help bring down the
H/(H+D) ratio. Fizzle! Too much gas after ECDC.
Shot 7: Try again with 2 ms less prepuff to 24 ms duration. Good shot.
Shot 8: Fizzle. Seems the pressure was still too high at 3 x 10^-6 Torr
before the shot.
Shot 9: Rice wants to go to 0.7 MA. No other change except waiting for the
gas to pump out. Data system hang in INIT. Tom's working on it.
No power test shot.
Shot 10: Try again. Good shot until it disrupted at 1.1 s. Prad increases
sharply at 1.065 s.
Shot 11: Trying to improve the startup again. Decreased EF4 current to -1280 A
and decreased Br0 to 2.25 mT. Good shot.
Shot 12: Repeat. Good shot.
Shot 13: ECDC for 10 minutes before shot 13. Good shot.
Shot 14: No ECDC before shot 14. Good shot.
Shot 15: ECDC before shot 15. Good shot. Long EDA with 3 MW combined ICRF.
Shot 16: ECDC before shot 16. Good shot. Long EDA with 3 MW combined ICRF.
Shot 17: ECDC before shot 17. Good shot. Long EDA with 3 MW combined ICRF.
Shot 18: No ECDC before shot 18. Good shot. Long EDA with 3 MW combined ICRF.
Data system hang after the shot before all of the data were taken.

Session Leader Comments

Jul 24 2001 09:12:52:747AM 1010724001 John Rice very late ITB formation, preceeded by giant sawteeth
H/D maximum .06

Jul 24 2001 09:12:57:277AM 1010724001 Steve Wukitch 001
request:
reload from 1010718004
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.25,1.5]

result:
nice shot
target nl_04~0.95
clean RF

next shot: repeat

Jul 24 2001 09:23:23:357AM 1010724002 John Rice great ITB formation
stabilized by J=port

Jul 24 2001 09:26:16:200AM 1010724002 Steve Wukitch 002
request:
reload from 1010718004
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.25,1.5]

result: good shot
multiple H-mode transitions
target nl_04~0.95
late RF trips

next shot: repeat with 70 MHz @ [1.1,1.5] sec

Jul 24 2001 09:41:10:747AM 1010724003 Steve Wukitch 003
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.1,1.5]

result: -

Jul 24 2001 09:48:19:690AM 1010724003 John Rice fiz

Jul 24 2001 09:54:53:767AM 1010724004 John Rice ITB, but H-L transition confuses whether J port
stabilized the barrier

Jul 24 2001 09:58:43:847AM 1010724004 Steve Wukitch 004
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [1.1,1.5]

result: good shot
multiple H-modes
clean RF

next shot: repeat with 70 MHz @[0.9,1.5]

Jul 24 2001 10:12:34:347AM 1010724005 John Rice ITB, but H-L transition at 1.0 s
at 500 kW, J-port doesn't seem to arrest the barrier

Jul 24 2001 10:19:36:533AM 1010724005 Steve Wukitch 005
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.6 MW [0.9,1.5]

result: good shot
multiple H-modes
fault at H->L , nice H->L EN-mode

next shot: repeat with 70 MHz higher power (0.9 MW)

Jul 24 2001 10:29:12:830AM 1010724006 John Rice fiz

Jul 24 2001 11:23:36:377AM 1010724006 Steve Wukitch 006
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.9 MW [0.9,1.5]

result: -

Jul 24 2001 11:12:50:720AM 1010724007 John Rice ITB, H-L at 1.05 s
J seems to arrest barrier

Jul 24 2001 11:23:58:440AM 1010724007 Steve Wukitch 007
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 0.9 MW [0.9,1.5]

result: good shot
multiple H-modes
late fault on E otherwise clean

next shot: repeat with 70 MHz higher power (1.5 MW)

Jul 24 2001 11:13:00:237AM 1010724008 John Rice fiz

Jul 24 2001 11:24:23:720AM 1010724008 Steve Wukitch 008
request:
nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.5 MW [0.9,1.5]

result: -

next shot: repeat with Ip~0.7 MA

Jul 24 2001 12:00:44:050PM 1010724009 John Rice no power

Jul 24 2001 12:02:30:533PM 1010724010 John Rice ITB
J port at 1.5 MW arrests barrier and heats core nicely
rotation spins way up

Jul 24 2001 12:15:01:487PM 1010724010 Steve Wukitch 010

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.5 MW [0.9,1.5]

result: plasma early disruption
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.1]
70 MHz power: 1.5 MW [0.9,1.1]
injection from J killed the plasma

next shot: repeat 70 MHz power: 1. MW [0.9,1.5]

Jul 24 2001 12:24:52:237PM 1010724011 Steve Wukitch 011

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.5]

result: plasma
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.4] faults

next shot: repeat 70 MHz power: 1. MW [01.1,1.5]

Jul 24 2001 12:27:53:347PM 1010724011 John Rice ITB
J port at 1.5 MW arrests barrier
rotation spins way up

Jul 24 2001 12:40:33:610PM 1010724012 Steve Wukitch 012

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.1,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
multiple transitions
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.1,1.35] faults

next shot: repeat with less faults from J

Jul 24 2001 12:46:37:190PM 1010724012 John Rice ITB
J port at 1 MW and 1.1 s perhaps too late to arrest barrier

Jul 24 2001 01:08:57:470PM 1010724013 John Rice ITB
J port at 1 MW and 1.0 s
H-L at 0.9 s

Jul 24 2001 01:09:32:143PM 1010724013 Steve Wukitch 013

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
multiple transitions
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.3] faults

next shot: repeat

Jul 24 2001 01:26:01:563PM 1010724014 Steve Wukitch 014

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
multiple transitions
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [1.0,1.5]

next shot: repeat with 70 MHz @1.0 MW [.7,1.5]

Jul 24 2001 01:32:53:783PM 1010724014 John Rice ITB
J port at 1 MW and 1.0 s
H-L at 0.9 s

Jul 24 2001 01:56:58:300PM 1010724015 John Rice no ITB
J port at 1 MW on at 0.7 s

Jul 24 2001 02:20:16:000PM 1010724015 Steve Wukitch 015

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.7,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA - no itb
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.7,1.5]

next shot: repeat with 70 MHz @1.0 MW [.8,1.5]

Jul 24 2001 02:22:59:190PM 1010724016 John Rice no ITB
J port at 1 MW on at 0.8 s

Jul 24 2001 02:24:49:953PM 1010724016 Steve Wukitch 016

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.8,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA w/o ITB
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.8,1.5]

next shot: repeat with 70 MHz @1.0 MW [.9,1.5]

Jul 24 2001 02:55:36:283PM 1010724016 John Rice ITB
J port at 1 MW on at 0.9 s

Jul 24 2001 02:55:46:080PM 1010724017 John Rice ITB
J port at 1 MW on at 0.9 s

Jul 24 2001 03:10:56:283PM 1010724017 Steve Wukitch 017

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA+ITB but no HIREX data
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.9,1.5]

next shot: repeat

Jul 24 2001 03:12:11:220PM 1010724018 Steve Wukitch 018

request:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [0.9,1.5]

result:
nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T
EDA+ITB
80 MHz power: 2 MW [0.7,1.5]
70 MHz power: 1.0 MW [.9,1.5]

next shot: repeat with 70 MHz power: 1.0 MW [.95,1.5]

Jul 24 2001 03:27:27:987PM 1010724018 John Rice ITB
J port at 1 MW on at 0.9 s

Physics Operator Comments

Jul 24 2001 08:19:30:713AM Joseph Snipes Run Plan and ENGINEERING SETUP FOR Tuesday 1010724

Continuing MP289A Double Barrier
SL: Rice, Wukitch
PO: Snipes

ECDC in D2 overnight stopping two hours before the run

RUN BEGINS AT 9:00 AND ENDS AT 5:00

Power systems the same as for shot 1010718004

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)
fill J-Bottom with 6 psi He Hybrid DISABLED(PG5)
Enable the following gate valves, assuming no vacuum problems:
ECE, DNB, VUV

RF STATUS:

XMTR 1 AND 2, RUN-ON STARTED AT 8:00 AM
XMTR 3 AND 4, RUN-ON STARTED AT 8:00 AM

RUN PLAN:

MP289A ITB studies starting from 1010718004 and running constant discharges
varying only the timing and power level of the J-port 70 MHz ICRF to attempt to
arrest the peaking due to the ITB and determine how best to control it.
In the event of J-port RF problems, we will do an Ip scan down to 0.6 MA and
then up to 1.0 MA to determine the effects on the foot of the ITB.

Jul 24 2001 08:20:50:700AM Joseph Snipes 24-JUL-2001 08:15:47.35 doing TCL command TYPE *************** BEGIN C
*************** BEGIN COLDSTART ******************
rtnode -- data loaded, A matrix responds
rtnode -- data loaded, M matrix responds
rtnode -- data loaded, PID matrix responds
RT_NODE Done
24-JUL-2001 08:17:19.40 doing TCL command TYPE *************** END COL
*************** END COLDSTART ******************

Jul 24 2001 08:58:45:357AM 1010724001 Joseph Snipes Shot 1: Copied shot 1010718004. Changed prepuff from 23 to 25 ms duration, but
left Br0 at +2 mT and EF4 at -1300 A. Copied EFC waveform from Segment
2 of shot 1010723024 into both segments 1 and 2 as suggested in an
e-mail from Wolfe yesterday. Loaded into model. Good shot.

Jul 24 2001 09:14:30:450AM 1010724002 Joseph Snipes Shot 2: Startup on shot 1 did not look good. Increased prepuff to 28 ms
duration, decreased Br0 by 0.25 mT to 1.75 mT. Increased EF4 current
back to its more typical -1290 A. Loaded into model. Good shot.

Jul 24 2001 09:32:23:107AM 1010724003 Joseph Snipes Shot 3: Startup was worse on shot 2! Try reducing prepuff again to 26 ms and
once again increase EF4 to -1280 A. Br0 looked O.K. on shot 2. Dud!

Jul 24 2001 09:47:39:923AM 1010724004 Joseph Snipes Shot 4: It seems that Bz0 is still too negative. Increase EF4 current to
-1270 A. Increase Br0 to 2.5 mT. Try again. Good shot.

Jul 24 2001 10:06:37:203AM 1010724005 Joseph Snipes Shot 5: Br0 and Bz0 were higher than on previous days, but the current rise
looks good, so I'll leave it for now. Good shot.

Jul 24 2001 10:33:13:033AM 1010724006 Joseph Snipes Shot 6: Started ECDC for 10 minutes just before shot 6 to help bring down the
H/(H+D) ratio. Fizzle! Too much gas after ECDC.

Jul 24 2001 10:44:56:063AM 1010724007 Joseph Snipes Shot 7: Try again with 2 ms less prepuff to 24 ms duration. Good shot.

Jul 24 2001 11:11:11:720AM 1010724008 Joseph Snipes Shot 8: Fizzle. Seems the pressure was still too high at 3 x 10^-6 Torr
before the shot.

Jul 24 2001 11:31:26:563AM 1010724008 Joseph Snipes Shot 9: Rice wants to go to 0.7 MA. No other change except waiting for the gas
to pump out. Data system hang in INIT. Tom's working on it. No
power test shot.

Jul 24 2001 11:52:48:080AM 1010724010 Joseph Snipes Shot 10: Try again. Good shot until it disrupted at 1.1 s. Prad increases
sharply at 1.065 s.

Jul 24 2001 12:32:17:470PM 1010724012 Joseph Snipes Shot 11: Trying to improve the startup again. Decreased EF4 current to -1280 A
and decreased Br0 to 2.25 mT. Good shot.

Jul 24 2001 12:32:38:813PM 1010724012 Joseph Snipes Shot 12: Repeat. Good shot.

Jul 24 2001 01:02:46:660PM 1010724013 Joseph Snipes Shot 13: ECDC for 10 minutes before shot 13. Good shot.

Jul 24 2001 01:19:28:313PM 1010724014 Joseph Snipes Shot 14: No ECDC before shot 14. Good shot.

Jul 24 2001 01:58:45:250PM 1010724015 Joseph Snipes Shot 15: ECDC before shot 15. Good shot. Long EDA with 3 MW combined ICRF.

Jul 24 2001 02:41:21:347PM 1010724016 Joseph Snipes Shot 16: ECDC before shot 16. Good shot. Long EDA with 3 MW combined ICRF.

Jul 24 2001 02:49:26:737PM 1010724017 Joseph Snipes Shot 17: ECDC before shot 17. Good shot. Long EDA with 3 MW combined ICRF.

Jul 24 2001 03:25:36:660PM 1010724018 Joseph Snipes Shot 18: No ECDC before shot 18. Good shot. Long EDA with 3 MW combined ICRF.
Data system hang after the shot before all of the data were taken.
Stuart is looking into it.

Jul 24 2001 05:34:10:533PM 1010724018 Joseph Snipes Data system meltdown probably due to overheating of the computers on this
90 degree day. Much of the data from shot 1010724018 was lost. An attempt at
another shot failed in INIT, so we punted the rest of the run.

Engineering Operator Comments

Shot Time Type Status Comment

1 08:56:47:543AM Plasma Ok

2 09:12:50:637AM Plasma Ok

3 09:30:17:777AM Plasma Ok

4 09:44:14:247AM Plasma Ok

5 10:03:06:017AM Plasma Ok

6 10:27:46:597AM Plasma Ok

7 10:43:01:160AM Plasma Ok

8 11:09:14:800AM Plasma Ok

9 11:30:19:500AM Plasma Bad Hung up in Init, continued shot without power

10 11:44:40:360AM Plasma Ok

11 12:11:00:843PM Plasma Ok

12 12:30:56:517PM Plasma Ok

13 12:58:06:097PM Plasma Ok

14 01:18:08:800PM Plasma Ok

15 01:44:45:690PM Plasma Ok

16 02:13:04:250PM Plasma Ok

17 02:44:13:923PM Plasma Ok

18 03:07:03:500PM Plasma Ok

Session Leader Comments
Jul 24 2001 09:12:52:747AM	1010724001	John Rice	very late ITB formation, preceeded by giant sawteeth H/D maximum .06
Jul 24 2001 09:12:57:277AM	1010724001	Steve Wukitch	001 request: reload from 1010718004 nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.6 MW [1.25,1.5] result: nice shot target nl_04~0.95 clean RF next shot: repeat
Jul 24 2001 09:23:23:357AM	1010724002	John Rice	great ITB formation stabilized by J=port
Jul 24 2001 09:26:16:200AM	1010724002	Steve Wukitch	002 request: reload from 1010718004 nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.6 MW [1.25,1.5] result: good shot multiple H-mode transitions target nl_04~0.95 late RF trips next shot: repeat with 70 MHz @ [1.1,1.5] sec
Jul 24 2001 09:41:10:747AM	1010724003	Steve Wukitch	003 request: nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.6 MW [1.1,1.5] result: -
Jul 24 2001 09:48:19:690AM	1010724003	John Rice	fiz
Jul 24 2001 09:54:53:767AM	1010724004	John Rice	ITB, but H-L transition confuses whether J port stabilized the barrier
Jul 24 2001 09:58:43:847AM	1010724004	Steve Wukitch	004 request: nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.6 MW [1.1,1.5] result: good shot multiple H-modes clean RF next shot: repeat with 70 MHz @[0.9,1.5]
Jul 24 2001 10:12:34:347AM	1010724005	John Rice	ITB, but H-L transition at 1.0 s at 500 kW, J-port doesn't seem to arrest the barrier
Jul 24 2001 10:19:36:533AM	1010724005	Steve Wukitch	005 request: nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.6 MW [0.9,1.5] result: good shot multiple H-modes fault at H->L , nice H->L EN-mode next shot: repeat with 70 MHz higher power (0.9 MW)
Jul 24 2001 10:29:12:830AM	1010724006	John Rice	fiz
Jul 24 2001 11:23:36:377AM	1010724006	Steve Wukitch	006 request: nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.9 MW [0.9,1.5] result: -
Jul 24 2001 11:12:50:720AM	1010724007	John Rice	ITB, H-L at 1.05 s J seems to arrest barrier
Jul 24 2001 11:23:58:440AM	1010724007	Steve Wukitch	007 request: nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 0.9 MW [0.9,1.5] result: good shot multiple H-modes late fault on E otherwise clean next shot: repeat with 70 MHz higher power (1.5 MW)
Jul 24 2001 11:13:00:237AM	1010724008	John Rice	fiz
Jul 24 2001 11:24:23:720AM	1010724008	Steve Wukitch	008 request: nl_04~1x10^20, Ip~0.8 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.5 MW [0.9,1.5] result: - next shot: repeat with Ip~0.7 MA
Jul 24 2001 12:00:44:050PM	1010724009	John Rice	no power
Jul 24 2001 12:02:30:533PM	1010724010	John Rice	ITB J port at 1.5 MW arrests barrier and heats core nicely rotation spins way up
Jul 24 2001 12:15:01:487PM	1010724010	Steve Wukitch	010 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.5 MW [0.9,1.5] result: plasma early disruption nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.1] 70 MHz power: 1.5 MW [0.9,1.1] injection from J killed the plasma next shot: repeat 70 MHz power: 1. MW [0.9,1.5]
Jul 24 2001 12:24:52:237PM	1010724011	Steve Wukitch	011 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [0.9,1.5] result: plasma nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [0.9,1.4] faults next shot: repeat 70 MHz power: 1. MW [01.1,1.5]
Jul 24 2001 12:27:53:347PM	1010724011	John Rice	ITB J port at 1.5 MW arrests barrier rotation spins way up
Jul 24 2001 12:40:33:610PM	1010724012	Steve Wukitch	012 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [1.1,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T multiple transitions 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [1.1,1.35] faults next shot: repeat with less faults from J
Jul 24 2001 12:46:37:190PM	1010724012	John Rice	ITB J port at 1 MW and 1.1 s perhaps too late to arrest barrier
Jul 24 2001 01:08:57:470PM	1010724013	John Rice	ITB J port at 1 MW and 1.0 s H-L at 0.9 s
Jul 24 2001 01:09:32:143PM	1010724013	Steve Wukitch	013 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [1.0,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T multiple transitions 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [1.0,1.3] faults next shot: repeat
Jul 24 2001 01:26:01:563PM	1010724014	Steve Wukitch	014 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [1.0,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T multiple transitions 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [1.0,1.5] next shot: repeat with 70 MHz @1.0 MW [.7,1.5]
Jul 24 2001 01:32:53:783PM	1010724014	John Rice	ITB J port at 1 MW and 1.0 s H-L at 0.9 s
Jul 24 2001 01:56:58:300PM	1010724015	John Rice	no ITB J port at 1 MW on at 0.7 s
Jul 24 2001 02:20:16:000PM	1010724015	Steve Wukitch	015 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [0.7,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T EDA - no itb 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [.7,1.5] next shot: repeat with 70 MHz @1.0 MW [.8,1.5]
Jul 24 2001 02:22:59:190PM	1010724016	John Rice	no ITB J port at 1 MW on at 0.8 s
Jul 24 2001 02:24:49:953PM	1010724016	Steve Wukitch	016 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [0.8,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T EDA w/o ITB 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [.8,1.5] next shot: repeat with 70 MHz @1.0 MW [.9,1.5]
Jul 24 2001 02:55:36:283PM	1010724016	John Rice	ITB J port at 1 MW on at 0.9 s
Jul 24 2001 02:55:46:080PM	1010724017	John Rice	ITB J port at 1 MW on at 0.9 s
Jul 24 2001 03:10:56:283PM	1010724017	Steve Wukitch	017 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [0.9,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T EDA+ITB but no HIREX data 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [.9,1.5] next shot: repeat
Jul 24 2001 03:12:11:220PM	1010724018	Steve Wukitch	018 request: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [0.9,1.5] result: nl_04~1x10^20, Ip~0.7 MA, BT=4.5 T EDA+ITB 80 MHz power: 2 MW [0.7,1.5] 70 MHz power: 1.0 MW [.9,1.5] next shot: repeat with 70 MHz power: 1.0 MW [.95,1.5]
Jul 24 2001 03:27:27:987PM	1010724018	John Rice	ITB J port at 1 MW on at 0.9 s

Physics Operator Comments
Jul 24 2001 08:19:30:713AM		Joseph Snipes	Run Plan and ENGINEERING SETUP FOR Tuesday 1010724 Continuing MP289A Double Barrier SL: Rice, Wukitch PO: Snipes ECDC in D2 overnight stopping two hours before the run RUN BEGINS AT 9:00 AND ENDS AT 5:00 Power systems the same as for shot 1010718004 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) fill J-Bottom with 6 psi He Hybrid DISABLED(PG5) Enable the following gate valves, assuming no vacuum problems: ECE, DNB, VUV RF STATUS: XMTR 1 AND 2, RUN-ON STARTED AT 8:00 AM XMTR 3 AND 4, RUN-ON STARTED AT 8:00 AM RUN PLAN: MP289A ITB studies starting from 1010718004 and running constant discharges varying only the timing and power level of the J-port 70 MHz ICRF to attempt to arrest the peaking due to the ITB and determine how best to control it. In the event of J-port RF problems, we will do an Ip scan down to 0.6 MA and then up to 1.0 MA to determine the effects on the foot of the ITB.
Jul 24 2001 08:20:50:700AM		Joseph Snipes	24-JUL-2001 08:15:47.35 doing TCL command TYPE ************* BEGIN C *********** BEGIN COLDSTART ************** rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 24-JUL-2001 08:17:19.40 doing TCL command TYPE *********** END COL *********** END COLDSTART ****************
Jul 24 2001 08:58:45:357AM	1010724001	Joseph Snipes	Shot 1: Copied shot 1010718004. Changed prepuff from 23 to 25 ms duration, but left Br0 at +2 mT and EF4 at -1300 A. Copied EFC waveform from Segment 2 of shot 1010723024 into both segments 1 and 2 as suggested in an e-mail from Wolfe yesterday. Loaded into model. Good shot.
Jul 24 2001 09:14:30:450AM	1010724002	Joseph Snipes	Shot 2: Startup on shot 1 did not look good. Increased prepuff to 28 ms duration, decreased Br0 by 0.25 mT to 1.75 mT. Increased EF4 current back to its more typical -1290 A. Loaded into model. Good shot.
Jul 24 2001 09:32:23:107AM	1010724003	Joseph Snipes	Shot 3: Startup was worse on shot 2! Try reducing prepuff again to 26 ms and once again increase EF4 to -1280 A. Br0 looked O.K. on shot 2. Dud!
Jul 24 2001 09:47:39:923AM	1010724004	Joseph Snipes	Shot 4: It seems that Bz0 is still too negative. Increase EF4 current to -1270 A. Increase Br0 to 2.5 mT. Try again. Good shot.
Jul 24 2001 10:06:37:203AM	1010724005	Joseph Snipes	Shot 5: Br0 and Bz0 were higher than on previous days, but the current rise looks good, so I'll leave it for now. Good shot.
Jul 24 2001 10:33:13:033AM	1010724006	Joseph Snipes	Shot 6: Started ECDC for 10 minutes just before shot 6 to help bring down the H/(H+D) ratio. Fizzle! Too much gas after ECDC.
Jul 24 2001 10:44:56:063AM	1010724007	Joseph Snipes	Shot 7: Try again with 2 ms less prepuff to 24 ms duration. Good shot.
Jul 24 2001 11:11:11:720AM	1010724008	Joseph Snipes	Shot 8: Fizzle. Seems the pressure was still too high at 3 x 10^-6 Torr before the shot.
Jul 24 2001 11:31:26:563AM	1010724008	Joseph Snipes	Shot 9: Rice wants to go to 0.7 MA. No other change except waiting for the gas to pump out. Data system hang in INIT. Tom's working on it. No power test shot.
Jul 24 2001 11:52:48:080AM	1010724010	Joseph Snipes	Shot 10: Try again. Good shot until it disrupted at 1.1 s. Prad increases sharply at 1.065 s.
Jul 24 2001 12:32:17:470PM	1010724012	Joseph Snipes	Shot 11: Trying to improve the startup again. Decreased EF4 current to -1280 A and decreased Br0 to 2.25 mT. Good shot.
Jul 24 2001 12:32:38:813PM	1010724012	Joseph Snipes	Shot 12: Repeat. Good shot.
Jul 24 2001 01:02:46:660PM	1010724013	Joseph Snipes	Shot 13: ECDC for 10 minutes before shot 13. Good shot.
Jul 24 2001 01:19:28:313PM	1010724014	Joseph Snipes	Shot 14: No ECDC before shot 14. Good shot.
Jul 24 2001 01:58:45:250PM	1010724015	Joseph Snipes	Shot 15: ECDC before shot 15. Good shot. Long EDA with 3 MW combined ICRF.
Jul 24 2001 02:41:21:347PM	1010724016	Joseph Snipes	Shot 16: ECDC before shot 16. Good shot. Long EDA with 3 MW combined ICRF.
Jul 24 2001 02:49:26:737PM	1010724017	Joseph Snipes	Shot 17: ECDC before shot 17. Good shot. Long EDA with 3 MW combined ICRF.
Jul 24 2001 03:25:36:660PM	1010724018	Joseph Snipes	Shot 18: No ECDC before shot 18. Good shot. Long EDA with 3 MW combined ICRF. Data system hang after the shot before all of the data were taken. Stuart is looking into it.
Jul 24 2001 05:34:10:533PM	1010724018	Joseph Snipes	Data system meltdown probably due to overheating of the computers on this 90 degree day. Much of the data from shot 1010724018 was lost. An attempt at another shot failed in INIT, so we punted the rest of the run.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:56:47:543AM	Plasma	Ok
2	09:12:50:637AM	Plasma	Ok
3	09:30:17:777AM	Plasma	Ok
4	09:44:14:247AM	Plasma	Ok
5	10:03:06:017AM	Plasma	Ok
6	10:27:46:597AM	Plasma	Ok
7	10:43:01:160AM	Plasma	Ok
8	11:09:14:800AM	Plasma	Ok
9	11:30:19:500AM	Plasma	Bad	Hung up in Init, continued shot without power
10	11:44:40:360AM	Plasma	Ok
11	12:11:00:843PM	Plasma	Ok
12	12:30:56:517PM	Plasma	Ok
13	12:58:06:097PM	Plasma	Ok
14	01:18:08:800PM	Plasma	Ok
15	01:44:45:690PM	Plasma	Ok
16	02:13:04:250PM	Plasma	Ok
17	02:44:13:923PM	Plasma	Ok
18	03:07:03:500PM	Plasma	Ok