Alcator C-Mod Run 990818 Information

Miniproposals

Miniproposal:

Date Filed:

Title:

First Author:

Session Leader: Ian Hutchinson (shots 1-21)

Miniproposal: 214

Date Filed: 1/5/1999

Title: D and E-port RF System Commissioning

First Author: Steve Wukitch

Session Leader: Steve Wukitch (shots 1-21)

Operators
Session leader(s):	Ian Hutchinson,Steve Wukitch
Physics operator(s):	Ian Hutchinson
Engineering operator(s):	Frank Silva

Engineering Operator Run Comment
MP #214 RF Conditioning/Hutch, Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Entered: Jul 7 2004 04:37:08:240PM

Author: To Be Determined

Physop Report 990818
SL Wukitch/Hutch
PO Hutch

Nominally MP 214 -- RF conditioning
However, did some ohmic H-modes as well for several other science programs:
Edge Fluctuation imaging, Puffing probe plumes, Omegatron, with RF using
the end of the shot.

Summary
_______
Started late at 1pm because of RF work and ran till 6pm.

Shots 1-5 similar to previous runs this week. After fixing fizzle problems
possibly associated with the controller updates, got 2.3MW into
plasma. Saw an H-mode apparantly induced by RF.

Shots 6-21 ohmic H-modes from 1.03MA (shot 7) to 1.129MA
(16-21). There were still numerous injections, which did not seem
necessarily to be related to RF, since RF was only allowed from .9s to
1.25s. Iron was present, although it is not clear how bad that is.

EDA behaviour of density and radiation could not be obtained even when the
RF was on. ELM-free accumulation was occuring.

H-modes were recovered even with Bt up to 5.1T, q=3.5 in the later parts of
some shots even without RF. This seems to indicate that once you have got
an H-mode by running the field down, it is easier to get it later in the
same shot even at higher field.

Some shots had peculiar MHD behaviour after the reversion to L-mode which
would bear investigation.

Also the "internal barrier" behaviour induced by H-L transitions was observed
on some shots.

Scorecard
_________

Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax
1 0.000 0.027 2 1.769 0.983
3 0.000 0.037 4 0.000 0.034
5 1.052 0.988 6 0.000 0.034
7 1.632 1.035 8 0.495 1.106
9 1.647 1.030 10 0.261 0.728
11 1.645 1.030 12 1.646 1.036
13 1.745 1.030 14 1.740 1.082
15 0.162 0.615 16 0.913 1.228
17 0.000 0.037 18 1.746 1.126
19 1.741 1.129 20 1.461 1.129
21 1.350 1.128
Finished summary for 990818 Total of 21 shots.
21 shots. 16 plasmas. 4 fizzles. 1 duds.
Fizzle = gt 27.0 lt 50kA

Details
_______
----------------------------------------------------------------------------
990818xxx hutch PHYSICS_OPERATOR Aug 18 1999 9:17:16:640AM
. . . . . . . . . . . . . . . . . . . .
Did cold start.
Set fluxihh f16dead to zero.
Engineering set up same as yesterday.

Plan
MP 214 -- RF conditioning
Start from yesterday's shot. Continue RF conditioning.

Setup power supplies from last shot. (1 MA, 5.4 T, flattop to 1.4 s)

Two hours of ECDC in D2 prior to the run.

Gas setup - fill B-top with 6 psi of D2 Hybrid enabled
fill B-side lower with 1 psi of Ar Hybrid enabled
fill B-side upper with 6 psi of H2 Hybrid DISABLED
fill C-side with 30 psi of D2 Hybrid enabled
leave J-bottom as is Hybrid DISABLED

The following gate valves should be enabled, assuming no vacuum problems:
ECE, VUV

----------------------------------------------------------------------------
990818xxx hutch PHYSICS_OPERATOR Aug 18 1999 9:22:29:890AM
. . . . . . . . . . . . . . . . . . . .
Br offset is .002 from previous shot.

Called Br controller. Diagnostics:

% Compiled module: MAKE_PREDICTOR.
MAKE PREDICTOR
% Compiled module: MDS$SET_DEF.
INPUT_NAMES STRING = Array[78]
P_NAMES STRING = Array[23]
input_names = F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F16 F17 F18A F19
F21 F22 F23 F24A F25 F26 F08 F13 F14 F15 F20 F27 F28 F29 BP01_BC BP02_BC
BP03_BC BP04_BC BP05_BC BP06_BC BP07_BC BP08_BC BP09_BC BP10_BC BP11_BC
BP12_BC BP13_BC BP14_BC BP15_BC BP16_DE BP17_JK BP18_JK BP19_JK BP20_BC
BP21_BC BP22_BC BP23_BC BP24_BC BP25_BC BP26_GH ROG_CD BTOR TF:BUS_R_CUR
OH1:BUS_R_CUR OH2_U:BUS_R_CUR OH2_L:BUS_R_CUR EF1_U:BUS_R_CUR EF1_L:BUS_R_CUR
EF2_U:BUS_R_CUR EF2_L:BUS_R_CUR EF3:U_BUS_R_CUR EF3:L_BUS_R_CUR
EF4:U_BUS_R_CUR EF4:L_BUS_R_CUR EFC:U_BUS_R_CUR EFC:L_BUS_R_CUR
CHOPPER:CURRENT NL_04 RF_LOAD_E Z_METER DIVBOLO1 DIVBOLO2 MINUS_1_VOLT
p_names= F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F16 F17 F18A F19 F21 F22
F23 F24A F25 F26 F28 F15
% Compiled module: INTERSECT.
max p_to_v*weight on input F02
max,min of scaled_pred 2.50000 -2.46450

Reset the offset to the same .002. Note this algorithm is "Vacuum".
----------------------------------------------------------------------------
990818xxx hutch PHYSICS_OPERATOR Aug 18 1999 9:42:28:200AM
. . . . . . . . . . . . . . . . . . . .
Rcur offset is 6300
zcur offsets are 0, 0
Called rcur. It retrieves an old shot. 93.....
We get an error.
% Compiled module: ASSEMBLE_PREDICTOR.
Assembling predictor
% Compiled module: GET_FACTOR.
% XMANAGER: The MODAL keyword to the XMANAGER procedure is obsolete. It is
superseded by the MODAL keyword to the WIDGET_BASE function.
\PCS::TOP.SEG_01:P_07
Unwinding answer is:
\HYBRID::TOP.PCS.SEG_01:P_07
About to link waveforms
Write whole wire done
% Compiled module: WRITE_P_OUTPUT.
% Compiled module: FLUXIHH.
Flux data retrieved for shot 930817004
PSILOOP FLOAT = Array[3072, 26]
Bp data retrieved for shot: 930817004
BPVAL FLOAT = Array[3072, 26]
% Compiled module: MDS$VMS_ERROR.
% Error occurred at: MDS$VMS_ERROR 41 MDS$ROOT:[IDL]MDS$VMS_ERROR.PRO;5
% MDS$OPEN 47 MDS$ROOT:[IDL]MDS$OPEN.PRO;6
% FBUP 49
CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FBUP.PRO;21
% FLUXIHH 273
CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FLUXIHH.PRO;27
% CALL_ALG 1
CMOD$MODELS:[HYBRID.IDL.PCS]CALL_ALG.PRO;7
% EDIT_WIRE_EVENT 759
CMOD$MODELS:[HYBRID.IDL.PCS]EDIT_WIRE.PRO;182
% WIDGET_EVENT
% XMANAGER_EVLOOP_STANDARD 472
@IDL_DIR:[LIB]LIB.TLB(XMANAGER)
% XMANAGER 698 @IDL_DIR:[LIB]LIB.TLB(XMANAGER)
% PCS 391
CMOD$MODELS:[HYBRID.IDL.PCS]PCS.PRO;82
% $MAIN$
% Execution halted at: FBUP 49
CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FBUP.PRO;21

PCS widget hangs. Error seems to be in the lines that open the RF limiter
for the old shot.

if(curshot le 940000000) then begin
; RFlimiter code.
mds$open,'RF',curshot <-----This is line 49.
rrfpos=mds$value('\RF::TOP.ANTENNA:RF_POS:ANALOG["LIMPOS"]',/quiet,status=sts)
mds$close,'RF',curshot

Doing these commands by hand in the pcs idl window seems to work ok.
Crash out of pcs.
----------------------------------------------------------------------------
990818xxx hutch PHYSICS_OPERATOR Aug 18 1999 9:57:56:466AM
. . . . . . . . . . . . . . . . . . . .
Restart pcs.
Call rcur. It works fine. Must have been an mds bug due to retrieval
from the juke-box. Wolfe reports this type of problem has occurred before.

Noticed that the algorithm string was not updated. Did that and made over
the version.

Call again. No, that does not work, probably it's already compiled.

Restart PCS. Call rcur. ok.

Call Br. ok. Load.

Now we have called the two segment one controllers that are changed by
the f29dead problem. I am leaving segment 2 because the changes ought to
be tiny there and I don't want to do too much at once.
----------------------------------------------------------------------------
990818001 hutch PHYSICS_OPERATOR Aug 18 1999 1:10:40:576PM
. . . . . . . . . . . . . . . . . . . .
First shot is a repeat with the PCS updates of yesterday.
Argon disabled.
Fizzle. Very late breakdown. Br too high by about 2 mT.

Br offset to 0mT from 2mT.
----------------------------------------------------------------------------
990818002 hutch PHYSICS_OPERATOR Aug 18 1999 1:33:45:200PM
. . . . . . . . . . . . . . . . . . . .
Plasma. First with zero offset setting on Br!
Hmode at 1s. First with J-port. 1.3MW max. Some signs of heating.
Density doubles during H-mode. The neutral gas pressure is about
40mtorr in the divertor cf about 20 for the Ohmic H-modes. This implies
that lower target density might be more conducive to H-mode.

Repeat.
----------------------------------------------------------------------------
990818003 hutch PHYSICS_OPERATOR Aug 18 1999 1:50:57:873PM
. . . . . . . . . . . . . . . . . . . .
Fizzle

rcur offset to 6500 from 6300
ef4 to -1250A from -1260A.
----------------------------------------------------------------------------
990818003 hutch PHYSICS_OPERATOR Aug 18 1999 1:52:52:716PM
. . . . . . . . . . . . . . . . . . . .
PCS error.
Crashed pcs when changing the offset in a predictor.
Change the offset. OK the controller. When the factor box pops up,
iconize PCS. OK the factor pop-up. The wire window does not close and
then cannot be closed thereafter without quiting PCS altogether.
----------------------------------------------------------------------------
990818004 hutch PHYSICS_OPERATOR Aug 18 1999 2:06:55:123PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Very late breakdown. 9ms.

EF4 to -1270A. Fill pulse to 22ms from 20ms.
----------------------------------------------------------------------------
990818005 hutch PHYSICS_OPERATOR Aug 18 1999 2:23:42:250PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Massive injections cause a disruption at 1s.
2.3 MW RF. H-mode at .91s but terminated by the injection.

Load segment 2 from 990521010.
----------------------------------------------------------------------------
990818006 hutch PHYSICS_OPERATOR Aug 18 1999 2:36:48:013PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Slightly late breakdown .6+. Carbon rises.

Rcur offset to 6000 in segment 1.
ICEF4 to -1275A
Br offset to -.0005T
----------------------------------------------------------------------------
990818007 hutch PHYSICS_OPERATOR Aug 18 1999 2:51:51:436PM
. . . . . . . . . . . . . . . . . . . .
Plasma. ELM-free OHHmode from .73 to 1.1s.

Extend Ip flat-top to 1.2s
Increase the level of the B_tor to 142kA (5.1T) in the re-ramped state.
Extend B_tor top to 1.25s.
----------------------------------------------------------------------------
990818008 hutch PHYSICS_OPERATOR Aug 18 1999 3:04:52:263PM
. . . . . . . . . . . . . . . . . . . .
Disruption at .48s. Two big injections occur a few ms before it.

rcur offset to 5500 in seg 1.
clearin point delayed from .3 to .35s.
----------------------------------------------------------------------------
990818009 hutch PHYSICS_OPERATOR Aug 18 1999 3:22:10:123PM
. . . . . . . . . . . . . . . . . . . .
Plasma. RF fires at end. OHHmode. At end an OHH at q nearly 4.
Core barrier signs at H-L transition.

nl04 to 1e20 at .3s.
Ip to .85MA at .27s.
----------------------------------------------------------------------------
990818010 hutch PHYSICS_OPERATOR Aug 18 1999 3:51:43:856PM
. . . . . . . . . . . . . . . . . . . .
Disrupts due to a brick at .25s.

Repeat

----------------------------------------------------------------------------
990818011 hutch PHYSICS_OPERATOR Aug 18 1999 3:53:00:420PM
. . . . . . . . . . . . . . . . . . . .
Plasma H-mode

Repeat
----------------------------------------------------------------------------
990818012 hutch PHYSICS_OPERATOR Aug 18 1999 4:17:04:606PM
. . . . . . . . . . . . . . . . . . . .
Plasma 2 H-modes. Over 2 MW RF. But some injections.

Extend Ip to 1.25s. And rcur and various others.
Lower nl04 to .8 at .63s.
----------------------------------------------------------------------------
990818013 hutch PHYSICS_OPERATOR Aug 18 1999 4:27:32:750PM
. . . . . . . . . . . . . . . . . . . .
Plasma

Ip to 1.1MA.
----------------------------------------------------------------------------
990818014 hutch PHYSICS_OPERATOR Aug 18 1999 4:32:22:920PM
. . . . . . . . . . . . . . . . . . . .
Plasma Multiple H-modes.

Ip to 1.2MA.
----------------------------------------------------------------------------
990818015 hutch PHYSICS_OPERATOR Aug 18 1999 4:53:11:216PM
. . . . . . . . . . . . . . . . . . . .
Plasma disrupts at .15s because of a brick.

Repeat
----------------------------------------------------------------------------
990818016 hutch PHYSICS_OPERATOR Aug 18 1999 5:08:30:420PM
. . . . . . . . . . . . . . . . . . . .
Plasma disrupts at .9s because of another brick, although the plasma is
going bad before then at about .8s.

Load to make sure the changes are in.
----------------------------------------------------------------------------
990818017 hutch PHYSICS_OPERATOR Aug 18 1999 5:08:56:326PM
. . . . . . . . . . . . . . . . . . . .
Fizzle. Bz has drifted up on this and the previous shot.
----------------------------------------------------------------------------
990818018 hutch PHYSICS_OPERATOR Aug 18 1999 5:34:03:950PM
. . . . . . . . . . . . . . . . . . . .
ICEF4 to -1285A.
Plasma. Multiple H-modes and multiple (survivable) injections.

Repeat
----------------------------------------------------------------------------
990818019 hutch PHYSICS_OPERATOR Aug 18 1999 5:44:13:826PM
. . . . . . . . . . . . . . . . . . . .
Plasma. 3 H-modes. Injections not too bad.

Repeat.
----------------------------------------------------------------------------
990818020 hutch PHYSICS_OPERATOR Aug 18 1999 6:00:25:623PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupts at 1.45s. 2 long H-modes.

Add a 100V gas puff from .65s to .8s.
----------------------------------------------------------------------------
990818021 hutch PHYSICS_OPERATOR Aug 18 1999 6:10:15:810PM
. . . . . . . . . . . . . . . . . . . .
Plasma. Disrupts at 1.35s. Gas puff of 100V did not overcome the feedback.
I guess I should have turned of the feedback as well.

RF stays on nicely at about 1.5MW. Seems as if it might be heating
but does not send the plasma back into H-mode.

Session Leader Comments

Aug 18 1999 01:37:20:293PM 990818001 Steve Wukitch 001 fizzle

comment: Checked RF tree status --- everything is ON
next shot: RF enabled, same programming (up to 0.8 MW)
as test shots

Aug 18 1999 01:37:33:200PM 990818002 Steve Wukitch 002 plasma
late H-mode (1 sec)

next shot: raise power and retune

Aug 18 1999 01:38:21:000PM 990818003 Steve Wukitch 003 fizzle

Physics Operator Comments

Aug 18 1999 09:17:16:640AM Ian Hutchinson Did cold start.
Set fluxihh f16dead to zero.
Engineering set up same as yesterday.

Plan
MP 214 -- RF conditioning
Start from yesterday's shot. Continue RF conditioning.

Setup power supplies from last shot. (1 MA, 5.4 T, flattop to 1.4 s)

Two hours of ECDC in D2 prior to the run.

Gas setup - fill B-top with 6 psi of D2 Hybrid enabled
fill B-side lower with 1 psi of Ar Hybrid enabled
fill B-side upper with 6 psi of H2 Hybrid DISABLED
fill C-side with 30 psi of D2 Hybrid enabled
leave J-bottom as is Hybrid DISABLED

The following gate valves should be enabled, assuming no vacuum problems:
ECE, VUV

Aug 18 1999 09:22:29:890AM Ian Hutchinson Br offset is .002 from previous shot.

Called Br controller. Diagnostics:

% Compiled module: MAKE_PREDICTOR.
MAKE PREDICTOR
% Compiled module: MDS$SET_DEF.
INPUT_NAMES STRING = Array[78]
P_NAMES STRING = Array[23]
input_names = F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F16 F17 F18A F19
F21 F22 F23 F24A F25 F26 F08 F13 F14 F15 F20 F27 F28 F29 BP01_BC BP02_BC
BP03_BC BP04_BC BP05_BC BP06_BC BP07_BC BP08_BC BP09_BC BP10_BC BP11_BC
BP12_BC BP13_BC BP14_BC BP15_BC BP16_DE BP17_JK BP18_JK BP19_JK BP20_BC
BP21_BC BP22_BC BP23_BC BP24_BC BP25_BC BP26_GH ROG_CD BTOR TF:BUS_R_CUR
OH1:BUS_R_CUR OH2_U:BUS_R_CUR OH2_L:BUS_R_CUR EF1_U:BUS_R_CUR EF1_L:BUS_R_CUR
EF2_U:BUS_R_CUR EF2_L:BUS_R_CUR EF3:U_BUS_R_CUR EF3:L_BUS_R_CUR
EF4:U_BUS_R_CUR EF4:L_BUS_R_CUR EFC:U_BUS_R_CUR EFC:L_BUS_R_CUR
CHOPPER:CURRENT NL_04 RF_LOAD_E Z_METER DIVBOLO1 DIVBOLO2 MINUS_1_VOLT
p_names= F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F16 F17 F18A F19 F21 F22
F23 F24A F25 F26 F28 F15
% Compiled module: INTERSECT.
max p_to_v*weight on input F02
max,min of scaled_pred 2.50000 -2.46450

Reset the offset to the same .002. Note this algorithm is "Vacuum".

Aug 18 1999 09:42:28:200AM Ian Hutchinson Rcur offset is 6300
zcur offsets are 0, 0
Called rcur. It retrieves an old shot. 93.....
We get an error.
% Compiled module: ASSEMBLE_PREDICTOR.
Assembling predictor
% Compiled module: GET_FACTOR.
% XMANAGER: The MODAL keyword to the XMANAGER procedure is obsolete. It is
superseded by the MODAL keyword to the WIDGET_BASE function.
\PCS::TOP.SEG_01:P_07
Unwinding answer is:
\HYBRID::TOP.PCS.SEG_01:P_07
About to link waveforms
Write whole wire done
% Compiled module: WRITE_P_OUTPUT.
% Compiled module: FLUXIHH.
Flux data retrieved for shot 930817004
PSILOOP FLOAT = Array[3072, 26]
Bp data retrieved for shot: 930817004
BPVAL FLOAT = Array[3072, 26]
% Compiled module: MDS$VMS_ERROR.
% Error occurred at: MDS$VMS_ERROR 41 MDS$ROOT:[IDL]MDS$VMS_ERROR.PRO;5
% MDS$OPEN 47 MDS$ROOT:[IDL]MDS$OPEN.PRO;6
% FBUP 49
CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FBUP.PRO;21
% FLUXIHH 273
CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FLUXIHH.PRO;27
% CALL_ALG 1
CMOD$MODELS:[HYBRID.IDL.PCS]CALL_ALG.PRO;7
% EDIT_WIRE_EVENT 759
CMOD$MODELS:[HYBRID.IDL.PCS]EDIT_WIRE.PRO;182
% WIDGET_EVENT
% XMANAGER_EVLOOP_STANDARD 472
@IDL_DIR:[LIB]LIB.TLB(XMANAGER)
% XMANAGER 698 @IDL_DIR:[LIB]LIB.TLB(XMANAGER)
% PCS 391
CMOD$MODELS:[HYBRID.IDL.PCS]PCS.PRO;82
% $MAIN$
% Execution halted at: FBUP 49
CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FBUP.PRO;21

PCS widget hangs. Error seems to be in the lines that open the RF limiter
for the old shot.

if(curshot le 940000000) then begin
; RFlimiter code.
mds$open,'RF',curshot <-----This is line 49.
rrfpos=mds$value('\RF::TOP.ANTENNA:RF_POS:ANALOG["LIMPOS"]',/quiet,status=sts)
mds$close,'RF',curshot

Doing these commands by hand in the pcs idl window seems to work ok.
Crash out of pcs.

Aug 18 1999 09:57:56:467AM Ian Hutchinson Restart pcs.
Call rcur. It works fine. Must have been an mds bug due to retrieval
from the juke-box. Wolfe reports this type of problem has occurred before.

Noticed that the algorithm string was not updated. Did that and made over
the version.

Call again. No, that does not work, probably it's already compiled.

Restart PCS. Call rcur. ok.

Call Br. ok. Load.

Now we have called the two segment one controllers that are changed by
the f29dead problem. I am leaving segment 2 because the changes ought to
be tiny there and I don't want to do too much at once.

Aug 18 1999 01:10:40:577PM 990818001 Ian Hutchinson First shot is a repeat with the PCS updates of yesterday.
Argon disabled.
Fizzle. Very late breakdown. Br too high by about 2 mT.

Br offset to 0mT from 2mT.

Aug 18 1999 01:33:45:200PM 990818002 Ian Hutchinson Plasma. First with zero offset setting on Br!
Hmode at 1s. First with J-port. 1.3MW max. Some signs of heating.
Density doubles during H-mode. The neutral gas pressure is about
40mtorr in the divertor cf about 20 for the Ohmic H-modes. This implies
that lower target density might be more conducive to H-mode.

Repeat.

Aug 18 1999 01:50:57:873PM 990818003 Ian Hutchinson Fizzle

rcur offset to 6500 from 6300
ef4 to -1250A from -1260A.

Aug 18 1999 01:52:52:717PM 990818003 Ian Hutchinson PCS error.
Crashed pcs when changing the offset in a predictor.
Change the offset. OK the controller. When the factor box pops up,
iconize PCS. OK the factor pop-up. The wire window does not close and
then cannot be closed thereafter without quiting PCS altogether.

Aug 18 1999 02:06:55:123PM 990818004 Ian Hutchinson Fizzle. Very late breakdown. 9ms.

EF4 to -1270A. Fill pulse to 22ms from 20ms.

Aug 18 1999 02:23:42:250PM 990818005 Ian Hutchinson Plasma. Massive injections cause a disruption at 1s.
2.3 MW RF. H-mode at .91s but terminated by the injection.

Load segment 2 from 990521010.

Aug 18 1999 02:36:48:013PM 990818006 Ian Hutchinson Fizzle. Slightly late breakdown .6+. Carbon rises.

Rcur offset to 6000 in segment 1.
ICEF4 to -1275A
Br offset to -.0005T

Aug 18 1999 02:51:51:437PM 990818007 Ian Hutchinson Plasma. ELM-free OHHmode from .73 to 1.1s.

Extend Ip flat-top to 1.2s
Increase the level of the B_tor to 142kA (5.1T) in the re-ramped state.
Extend B_tor top to 1.25s.

Aug 18 1999 03:04:52:263PM 990818008 Ian Hutchinson Disruption at .48s. Two big injections occur a few ms before it.

rcur offset to 5500 in seg 1.
clearin point delayed from .3 to .35s.

Aug 18 1999 03:22:10:123PM 990818009 Ian Hutchinson Plasma. RF fires at end. OHHmode. At end an OHH at q nearly 4.
Core barrier signs at H-L transition.

nl04 to 1e20 at .3s.
Ip to .85MA at .27s.

Aug 18 1999 03:51:43:857PM 990818010 Ian Hutchinson Disrupts due to a brick at .25s.

Repeat

Aug 18 1999 03:53:00:420PM 990818011 Ian Hutchinson Plasma H-mode

Repeat

Aug 18 1999 04:17:04:607PM 990818012 Ian Hutchinson Plasma 2 H-modes. Over 2 MW RF. But some injections.

Extend Ip to 1.25s. And rcur and various others.
Lower nl04 to .8 at .63s.

Aug 18 1999 04:27:32:750PM 990818013 Ian Hutchinson Plasma

Ip to 1.1MA.

Aug 18 1999 04:32:22:920PM 990818014 Ian Hutchinson Plasma Multiple H-modes.

Ip to 1.2MA.

Aug 18 1999 04:53:11:217PM 990818015 Ian Hutchinson Plasma disrupts at .15s because of a brick.

Repeat

Aug 18 1999 05:08:30:420PM 990818016 Ian Hutchinson Plasma disrupts at .9s because of another brick, although the plasma is
going bad before then at about .8s.

Load to make sure the changes are in.

Aug 18 1999 05:08:56:327PM 990818017 Ian Hutchinson Fizzle. Bz has drifted up on this and the previous shot.

Aug 18 1999 05:34:03:950PM 990818018 Ian Hutchinson ICEF4 to -1285A.
Plasma. Multiple H-modes and multiple (survivable) injections.

Repeat

Aug 18 1999 05:44:13:827PM 990818019 Ian Hutchinson Plasma. 3 H-modes. Injections not too bad.

Repeat.

Aug 18 1999 06:00:25:623PM 990818020 Ian Hutchinson Plasma. Disrupts at 1.45s. 2 long H-modes.

Add a 100V gas puff from .65s to .8s.

Aug 18 1999 06:10:15:810PM 990818021 Ian Hutchinson Plasma. Disrupts at 1.35s. Gas puff of 100V did not overcome the feedback.
I guess I should have turned of the feedback as well.

RF stays on nicely at about 1.5MW. Seems as if it might be heating
but does not send the plasma back into H-mode.

Engineering Operator Comments

Shot Time Type Status Comment

1 01:03:57:420PM Plasma Ok no faults

2 01:16:46:013PM Plasma Ok no faults/plasma

3 01:36:25:233PM Plasma Ok no faults

4 01:52:27:373PM Plasma Ok no faul;ts

5 02:05:20:340PM Plasma Ok no faults

6 02:21:57:920PM Plasma Ok no faults

7 02:35:00:687PM Plasma Ok no faults

8 02:50:05:153PM Plasma Ok (null)

9 03:03:00:810PM Plasma Ok (null)

10 03:20:12:013PM Plasma Ok (null)

11 03:38:00:607PM Plasma Ok (null)

12 03:53:34:030PM Plasma Ok (null)

13 04:06:58:450PM Plasma Ok (null)

14 04:21:37:937PM Plasma Ok (null)

15 04:36:01:810PM Plasma Ok (null)

16 04:48:54:340PM Plasma Ok (null)

17 05:04:27:717PM Plasma Ok (null)

18 05:17:20:140PM Plasma Ok (null)

19 05:32:02:170PM Plasma Ok (null)

20 05:45:08:200PM Plasma Ok (null)

21 05:58:09:750PM Plasma Ok (null)

Session Leader Comments
Aug 18 1999 01:37:20:293PM	990818001	Steve Wukitch	001 fizzle comment: Checked RF tree status --- everything is ON next shot: RF enabled, same programming (up to 0.8 MW) as test shots
Aug 18 1999 01:37:33:200PM	990818002	Steve Wukitch	002 plasma late H-mode (1 sec) next shot: raise power and retune
Aug 18 1999 01:38:21:000PM	990818003	Steve Wukitch	003 fizzle

Physics Operator Comments
Aug 18 1999 09:17:16:640AM		Ian Hutchinson	Did cold start. Set fluxihh f16dead to zero. Engineering set up same as yesterday. Plan MP 214 -- RF conditioning Start from yesterday's shot. Continue RF conditioning. Setup power supplies from last shot. (1 MA, 5.4 T, flattop to 1.4 s) Two hours of ECDC in D2 prior to the run. Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 6 psi of H2 Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV
Aug 18 1999 09:22:29:890AM		Ian Hutchinson	Br offset is .002 from previous shot. Called Br controller. Diagnostics: % Compiled module: MAKE_PREDICTOR. MAKE PREDICTOR % Compiled module: MDS$SET_DEF. INPUT_NAMES STRING = Array[78] P_NAMES STRING = Array[23] input_names = F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F16 F17 F18A F19 F21 F22 F23 F24A F25 F26 F08 F13 F14 F15 F20 F27 F28 F29 BP01_BC BP02_BC BP03_BC BP04_BC BP05_BC BP06_BC BP07_BC BP08_BC BP09_BC BP10_BC BP11_BC BP12_BC BP13_BC BP14_BC BP15_BC BP16_DE BP17_JK BP18_JK BP19_JK BP20_BC BP21_BC BP22_BC BP23_BC BP24_BC BP25_BC BP26_GH ROG_CD BTOR TF:BUS_R_CUR OH1:BUS_R_CUR OH2_U:BUS_R_CUR OH2_L:BUS_R_CUR EF1_U:BUS_R_CUR EF1_L:BUS_R_CUR EF2_U:BUS_R_CUR EF2_L:BUS_R_CUR EF3:U_BUS_R_CUR EF3:L_BUS_R_CUR EF4:U_BUS_R_CUR EF4:L_BUS_R_CUR EFC:U_BUS_R_CUR EFC:L_BUS_R_CUR CHOPPER:CURRENT NL_04 RF_LOAD_E Z_METER DIVBOLO1 DIVBOLO2 MINUS_1_VOLT p_names= F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F16 F17 F18A F19 F21 F22 F23 F24A F25 F26 F28 F15 % Compiled module: INTERSECT. max p_to_v*weight on input F02 max,min of scaled_pred 2.50000 -2.46450 Reset the offset to the same .002. Note this algorithm is "Vacuum".
Aug 18 1999 09:42:28:200AM		Ian Hutchinson	Rcur offset is 6300 zcur offsets are 0, 0 Called rcur. It retrieves an old shot. 93..... We get an error. % Compiled module: ASSEMBLE_PREDICTOR. Assembling predictor % Compiled module: GET_FACTOR. % XMANAGER: The MODAL keyword to the XMANAGER procedure is obsolete. It is superseded by the MODAL keyword to the WIDGET_BASE function. \PCS::TOP.SEG_01:P_07 Unwinding answer is: \HYBRID::TOP.PCS.SEG_01:P_07 About to link waveforms Write whole wire done % Compiled module: WRITE_P_OUTPUT. % Compiled module: FLUXIHH. Flux data retrieved for shot 930817004 PSILOOP FLOAT = Array[3072, 26] Bp data retrieved for shot: 930817004 BPVAL FLOAT = Array[3072, 26] % Compiled module: MDS$VMS_ERROR. % Error occurred at: MDS$VMS_ERROR 41 MDS$ROOT:[IDL]MDS$VMS_ERROR.PRO;5 % MDS$OPEN 47 MDS$ROOT:[IDL]MDS$OPEN.PRO;6 % FBUP 49 CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FBUP.PRO;21 % FLUXIHH 273 CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FLUXIHH.PRO;27 % CALL_ALG 1 CMOD$MODELS:[HYBRID.IDL.PCS]CALL_ALG.PRO;7 % EDIT_WIRE_EVENT 759 CMOD$MODELS:[HYBRID.IDL.PCS]EDIT_WIRE.PRO;182 % WIDGET_EVENT % XMANAGER_EVLOOP_STANDARD 472 @IDL_DIR:[LIB]LIB.TLB(XMANAGER) % XMANAGER 698 @IDL_DIR:[LIB]LIB.TLB(XMANAGER) % PCS 391 CMOD$MODELS:[HYBRID.IDL.PCS]PCS.PRO;82 % $MAIN$ % Execution halted at: FBUP 49 CMOD$MODELS:[HYBRID.IDL.USER_ALGS.CONTIHH]FBUP.PRO;21 PCS widget hangs. Error seems to be in the lines that open the RF limiter for the old shot. if(curshot le 940000000) then begin ; RFlimiter code. mds$open,'RF',curshot <-----This is line 49. rrfpos=mds$value('\RF::TOP.ANTENNA:RF_POS:ANALOG["LIMPOS"]',/quiet,status=sts) mds$close,'RF',curshot Doing these commands by hand in the pcs idl window seems to work ok. Crash out of pcs.
Aug 18 1999 09:57:56:467AM		Ian Hutchinson	Restart pcs. Call rcur. It works fine. Must have been an mds bug due to retrieval from the juke-box. Wolfe reports this type of problem has occurred before. Noticed that the algorithm string was not updated. Did that and made over the version. Call again. No, that does not work, probably it's already compiled. Restart PCS. Call rcur. ok. Call Br. ok. Load. Now we have called the two segment one controllers that are changed by the f29dead problem. I am leaving segment 2 because the changes ought to be tiny there and I don't want to do too much at once.
Aug 18 1999 01:10:40:577PM	990818001	Ian Hutchinson	First shot is a repeat with the PCS updates of yesterday. Argon disabled. Fizzle. Very late breakdown. Br too high by about 2 mT. Br offset to 0mT from 2mT.
Aug 18 1999 01:33:45:200PM	990818002	Ian Hutchinson	Plasma. First with zero offset setting on Br! Hmode at 1s. First with J-port. 1.3MW max. Some signs of heating. Density doubles during H-mode. The neutral gas pressure is about 40mtorr in the divertor cf about 20 for the Ohmic H-modes. This implies that lower target density might be more conducive to H-mode. Repeat.
Aug 18 1999 01:50:57:873PM	990818003	Ian Hutchinson	Fizzle rcur offset to 6500 from 6300 ef4 to -1250A from -1260A.
Aug 18 1999 01:52:52:717PM	990818003	Ian Hutchinson	PCS error. Crashed pcs when changing the offset in a predictor. Change the offset. OK the controller. When the factor box pops up, iconize PCS. OK the factor pop-up. The wire window does not close and then cannot be closed thereafter without quiting PCS altogether.
Aug 18 1999 02:06:55:123PM	990818004	Ian Hutchinson	Fizzle. Very late breakdown. 9ms. EF4 to -1270A. Fill pulse to 22ms from 20ms.
Aug 18 1999 02:23:42:250PM	990818005	Ian Hutchinson	Plasma. Massive injections cause a disruption at 1s. 2.3 MW RF. H-mode at .91s but terminated by the injection. Load segment 2 from 990521010.
Aug 18 1999 02:36:48:013PM	990818006	Ian Hutchinson	Fizzle. Slightly late breakdown .6+. Carbon rises. Rcur offset to 6000 in segment 1. ICEF4 to -1275A Br offset to -.0005T
Aug 18 1999 02:51:51:437PM	990818007	Ian Hutchinson	Plasma. ELM-free OHHmode from .73 to 1.1s. Extend Ip flat-top to 1.2s Increase the level of the B_tor to 142kA (5.1T) in the re-ramped state. Extend B_tor top to 1.25s.
Aug 18 1999 03:04:52:263PM	990818008	Ian Hutchinson	Disruption at .48s. Two big injections occur a few ms before it. rcur offset to 5500 in seg 1. clearin point delayed from .3 to .35s.
Aug 18 1999 03:22:10:123PM	990818009	Ian Hutchinson	Plasma. RF fires at end. OHHmode. At end an OHH at q nearly 4. Core barrier signs at H-L transition. nl04 to 1e20 at .3s. Ip to .85MA at .27s.
Aug 18 1999 03:51:43:857PM	990818010	Ian Hutchinson	Disrupts due to a brick at .25s. Repeat
Aug 18 1999 03:53:00:420PM	990818011	Ian Hutchinson	Plasma H-mode Repeat
Aug 18 1999 04:17:04:607PM	990818012	Ian Hutchinson	Plasma 2 H-modes. Over 2 MW RF. But some injections. Extend Ip to 1.25s. And rcur and various others. Lower nl04 to .8 at .63s.
Aug 18 1999 04:27:32:750PM	990818013	Ian Hutchinson	Plasma Ip to 1.1MA.
Aug 18 1999 04:32:22:920PM	990818014	Ian Hutchinson	Plasma Multiple H-modes. Ip to 1.2MA.
Aug 18 1999 04:53:11:217PM	990818015	Ian Hutchinson	Plasma disrupts at .15s because of a brick. Repeat
Aug 18 1999 05:08:30:420PM	990818016	Ian Hutchinson	Plasma disrupts at .9s because of another brick, although the plasma is going bad before then at about .8s. Load to make sure the changes are in.
Aug 18 1999 05:08:56:327PM	990818017	Ian Hutchinson	Fizzle. Bz has drifted up on this and the previous shot.
Aug 18 1999 05:34:03:950PM	990818018	Ian Hutchinson	ICEF4 to -1285A. Plasma. Multiple H-modes and multiple (survivable) injections. Repeat
Aug 18 1999 05:44:13:827PM	990818019	Ian Hutchinson	Plasma. 3 H-modes. Injections not too bad. Repeat.
Aug 18 1999 06:00:25:623PM	990818020	Ian Hutchinson	Plasma. Disrupts at 1.45s. 2 long H-modes. Add a 100V gas puff from .65s to .8s.
Aug 18 1999 06:10:15:810PM	990818021	Ian Hutchinson	Plasma. Disrupts at 1.35s. Gas puff of 100V did not overcome the feedback. I guess I should have turned of the feedback as well. RF stays on nicely at about 1.5MW. Seems as if it might be heating but does not send the plasma back into H-mode.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	01:03:57:420PM	Plasma	Ok	no faults
2	01:16:46:013PM	Plasma	Ok	no faults/plasma
3	01:36:25:233PM	Plasma	Ok	no faults
4	01:52:27:373PM	Plasma	Ok	no faul;ts
5	02:05:20:340PM	Plasma	Ok	no faults
6	02:21:57:920PM	Plasma	Ok	no faults
7	02:35:00:687PM	Plasma	Ok	no faults
8	02:50:05:153PM	Plasma	Ok	(null)
9	03:03:00:810PM	Plasma	Ok	(null)
10	03:20:12:013PM	Plasma	Ok	(null)
11	03:38:00:607PM	Plasma	Ok	(null)
12	03:53:34:030PM	Plasma	Ok	(null)
13	04:06:58:450PM	Plasma	Ok	(null)
14	04:21:37:937PM	Plasma	Ok	(null)
15	04:36:01:810PM	Plasma	Ok	(null)
16	04:48:54:340PM	Plasma	Ok	(null)
17	05:04:27:717PM	Plasma	Ok	(null)
18	05:17:20:140PM	Plasma	Ok	(null)
19	05:32:02:170PM	Plasma	Ok	(null)
20	05:45:08:200PM	Plasma	Ok	(null)
21	05:58:09:750PM	Plasma	Ok	(null)