Alcator C-Mod Run 1030610 Information

Miniproposals

Miniproposal: 303

Date Filed: 6/21/2002

Title: High Performance ITBs

First Author: John Rice

Session Leader: John Rice (shots 1-28)

Operators
Session leader(s):	John Rice
Physics operator(s):	Robert Granetz
Engineering operator(s):	Unknown

Engineering Operator Run Comment
Purpose: MP 303 - High Performance ITB's/Rice/Granetz

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:33:117PM

Author: John Rice

Session Leader Run Summary for 1030610 MP303 High Performance ITBs

Precious few ITBs were obtained, shots 14, 16, 18 and 24, and none
would qualify as high performance. The discharges were plagued by
repeated H-L transitions which prevented the ITBs from developing.
The RF performed very well with many shots over 3.5 MW. The H/D
ratio was not too bad, but Mo levels were somewhat high. The best
ITB was on shot 14 at 4.5T, but was it high performance? Not with
an H-factor of .82 it wasn't. The other decent ITB was on shot 24
at 6.4T, which exhibited a very narrow density and x-ray peaking,
as was seen last year. Was shot 24 high performance? Not with an
H-factor of .85 it wasn't. We were barely able to produce any
ITBs, let alone decent ones, let alone high performance ones.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:18:177PM

Author: Robert Granetz

Physics operator summary for run 1030610 (Tuesday):

MP 303 - High Performance ITB's

Session leader: J. Rice
Physics operator: R. Granetz
Engineers in charge:

Summary: We got some short H-mode ITB's with inboard-side resonance on
shots 14, 16, 17, and 18 (4.5 T, 0.8 MA, Prf=3.4 MW). We then
switched to 6.4 T to do outboard-side resonance on shots 20 and
24. We got full-length plasmas on both shots, but the TF
crowbarred both times, necessitating long delays and multiple
TF-only test shots. Nevertheless, I think shot 24 had a long
ITB (t=1.3-1.5 s). The x-ray profile was very narrow, and the
Thomson profiles were peaked, but over a very small radius
(consistent with John Rice's previous observations.)

Other than the crowbars, the machine ran well. There were no
fizzles or duds, and all shots had full rampdowns. There were no
disruptions. After shot 20, the network server for the paragon
stations crashed, necessitating a reboot of all the paragon
stations.

Scorecard: 21 plasmas
0 fizzles
0 duds
6 test or no-power shot cycle
0 aborted and/or screwed up by computer problems
----------
27 total

-------------------------------------------------------------------------------
Engineering setup for Tuesday, 10 June 2003

Purpose: MP 303 - High Performance ITB's

Session leader: J. Rice
Physics operator: R. Granetz

ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00.
Bake at 60 C overnight as well, if possible.

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

If RF has fired into the vacuum chamber prior to the start of the run, then
we will need to do 10 minutes of ECDC before the first shot.

Power systems the same as on 1030605028 (0.8 MA, 5.4 T, lower single null)

A-coils should be hooked up as on 1030507027 (+Dtop -Dbot -Jtop +Jbot), but
the power supply should NOT be enabled.

Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC)
fill C-side with 30 psi D2 Hybrid enabled (PG3)

Enable the following gate valves, assuming no vacuum problems:
ECE, DNB

-------------------------------------------------------------------------------
RF Setup: All 4 transmitters in Run On by 08:00. We want 5 MW today.

-------------------------------------------------------------------------------
Run Plan: Start by getting good ITB's at 4.5 T, 0.8 MA, and 5 MW of ICRF
(off-axis on inboard side) At some point we will switch to 6.1 T,
1.2 MA, and 5 MW (off-axis on outboard side) to get high
performance ITB's. (A-coils will be needed for the 1.2 MA
discharges.) Obtain high quality Te, Ti, ne, and Vtor profiles.
Vary DNB timing relative to the ITB evolution.

-------------------------------------------------------------------------------

ECDC was done overnight, as well as a 60 C bake.

Hybrid coldstart done by the engineering group; no errors found

Loaded PCS segment 2 from shot 1030605028 (0.8 MA, 5.4 T, single
null lower), segment 1 from shot 1030606035 (last shot from last
Friday). Changed BT to be 4.5 T (125 kA) in segment 2.

-------------------------------------------------------------------------------

Shot 01 -- Plasma. Good shot. Prf=0.5+1.5+0=2 MW (D+E+J). Btor=4.58 T.
Ip=0.8 MA. Target nl_04=0.9e20 m-2. Great startup, even though
Br0=-2.6 mT ! No early hard x-rays. John thinks there was an
ITB (inboard resonance), but the core Thomson was not on for the
first shot. It will be on for the 2nd shot. GPC2 needs to be
recalibrated.

Next shot: increase argon puff by 10 ms. More RF power.

Shot 02 -- Plasma. Good shot. Prf=0.5+1.5+0=2 MW. Horrible startup, huge
Br0, some hard x-rays, almost lost it. H/D=4-8%.

Next shot: increase Br0 by 0.25 mT (to 0.000 T)

Shot 03 -- Plasma. Good shot. Good startup. Prf=0.6+1.4+1.6=3.1 MW.
No ITB's except at H-L back transitions. Now have my peaking
scope working with both ne0/nebar and xray_width.

Next shot: no PCS changes. More RF power.

Shot 04 -- Plasma. Good shot. Good startup. Prf=0.7+1.4+1.1=3.2 MW.
Still no ITB's except at H-L back transitions.

Next shot: raise density by 10% (0.8e20 --> 0.9e20 m-2)

Shot 05 -- No-power cycle. TCI failed before the shot, so I opted to turn
off the supplies rather than a wide open gas valve.

Shot 06 -- Plasma. Good Shot. Startup was not as good as shot 04.
Target nl_04=1.0e20 m-2. Some hard x-rays. Still no ITB's
except for H-L back transitions.

Next shot: no PCS changes

Shot 07 -- Plasma. Good shot. Prf=0.8+1.7+~0 = 2.5 MW. Still only have
the H-L back transition ITB's. Startup is not great, with some
hard x-rays.

Next shot: reduce Btor by 2% (from 4.58 to 4.50 T)

Shot 08 -- Plasma. Good shot. Btor=4.50 T. No TCI data (camac problem), so
no ne peaking, but x-ray width indicates that ITB's formed before
the H-L back transitions, finally! Prf=0.9+1.5+~0=2.4 MW.
One of the TF joints is showing a high temperature.

Next shot: TF-only test shot (5.4 T) to check joint temperature.

Shot 09 -- Test. 5.4 tesla TF-only shot to check joint resistance. Seems
to be okay on the TF scanner.

Next shot: back to plasma operation

Shot 10 -- Plasma. Good shot. Btor=4.51 T. No H-mode ITB's.
Prf=0.9+1.4+1.1=3.4 MW. H/D=4-6%.

Next shot: no PCS changes.

Shot 11 -- Plasma. Good shot. Prf=3.3 MW. No H-mode ITB's. H/D=6%.

Next shot: raise density another 10%.

Shot 12 -- Plasma. Good shot. nl_04=1.1e20 m-2. Prf=0+1.5+0=1.5 MW, so
only got one H-mode. Great startup; no hard x-rays.

Next shot: no PCS changes.

Shot 13 -- Plasma. Good shot. Prf=1.0+1.5+0=2.5 MW. H/D=4-6%. Good startup.
No H-mode ITB's.

Next shot: no PCS changes.

Shot 14 -- Plasma. Good shot. Got a good ITB on the 2nd H-mode! Good
startup. Prf=0.9+1.4+1.1=3.4 MW. H/D=4-5%.

Next shot: reduce Btor by another 1% (I_TF=121500 A). Increase
argon puff by another 10 ms.

Shot 15 -- Plasma. Good shot. No H-mode ITB's Prf=0.9+1.4+1.1=3.4 MW.
H/D=4-6%. Good startup.

Next shot: add the 1% back to Btor.

Shot 16 -- Plasma. Good shot. Got another ITB on the final H-mode!
Prf=1.0+1.4+1.0=3.4 MW. H/D=4-6%. Good startup.

Next shot: no PCS changes.

Shot 17 -- Plasma. Good shot. Got another ITB on the final H-mode.
Prf=1.0+1.4+1.0=3.4 MW. H/D=4-6%. Good startup.

Next shot: no PCS changes.

Shot 18 -- Plasma. Good shot. Another H-mode ITB, but not as clear as the
previous ones today. Prf=1.0+1.4+1.0=3.4 MW. H/D=6%.

Next shot: no PCS changes. The DNB is firing at t=1.35 s.

Shot 19 -- Plasma. Good shot. Bad startup, lots of hard x-rays. TCI failed
on channel 4. Density feedback failed. J-port RF dropped out
early. No ITBs.

Next shot: go to other half of the MP. Raise Bt to 6.4 T, Ip
to 0.9 MA. Decrease density to nl_04=0.8e20 m-2.

Shot 20 -- Plasma. Full-length shot, but TF crowbarred. Bt=6.4 T, Ip=0.9 MA.
TCI failed again -- no feedback, so density was too high.
Prf=3.3 --> 2 --> 1 MW. Multiple H-modes, but no ITB's. The
paragon server node crashed, so all of the paragon PC's will have
to be rebooted before the next shot. The DNB suddenly developed
a problem with the beam current signal.

Next shot: TF-only test.

Shot 21 -- Test. TF-only, 50 kA. OK

Next shot: 150 kA TF-only test.

Shot 22 -- No power. Should have been a 150 kA TF-only test.

Next shot: 150 kA TF-only test.

Shot 23 -- Test. TF-only, 150 kA. OK

Next shot: back to 6.4 T plasma operation

Shot 24 -- Plasma. Good shot, but the TF crowbarred again. BT=6.4 T,
Ip=0.9 MA, Prf=~0 + 1.4+1.1=2.5 MW. H/D=7%. I think this
had a long ITB (from 1.3 to 1.5 s) during the H-mode, judging
from the x-ray peaking. Dmitri reports that the Thomson shows
a very small diameter peaked region.

Next shot: 50 kA TF-only test.

Shot 25 -- Test. 50 kA TF-only test. OK

Next shot: plasma, with Bt=5.4 T, Ip=0.8 MA

Shot 26 -- Plasma. Good shot. Btor=5.4 T, Ip=0.8 MA, nl (target) = 0.9e20 m-2
Prf=0.5+1.4+1.1=3.0 MW. H/D=6-8%. H-modes, no ITBs.

Next shot: get a start on tomorrow's run. Load segment 2 from
1030529016, except reduce nl_04 to 1.0e20 m-2, and turn on the
A-coils in the normal suppression configuration. Bt=5.4 T,
Ip=1.0 MA.

Shot 27 -- Plasma. Good shot. Bt=5.4, Ip=1.0 MA, nl(target)=1.1e20 m-2, and
Prf=3.0-3.6 MW. Lots of short (ELM-free?) H-modes. Startup was
bad though.

End of run.

Session Leader Comments

Jun 10 2003 09:08:20:540AM 1030610001 John Rice 4.6 T, 2 MW ICRF w/ some trips
some indication of an ITB at 1.1 s

Jun 10 2003 09:27:35:563AM 1030610002 John Rice 4.6 T, 2 MW ICRF
ITB? who knows?

Jun 10 2003 09:52:38:313AM 1030610003 John Rice 4.6 T, 3 MW ICRF
ITB? H-L transition at .95 s spoiled it

Jun 10 2003 10:05:57:697AM 1030610004 John Rice 4.6 T, 3 MW ICRF
no ITB, too many H-L transitions

Jun 10 2003 10:51:39:317AM 1030610005 John Rice no power shot

Jun 10 2003 10:51:25:753AM 1030610006 John Rice ugly

Jun 10 2003 11:06:22:893AM 1030610007 John Rice 4.58 T, 1.5 MW RF
ITB at 1.3 s

Jun 10 2003 11:25:18:897AM 1030610008 John Rice 4.5 T, 2 MW RF
ITB? no

Jun 10 2003 11:36:47:967AM 1030610009 John Rice 0 T, 0 MW RF
no ITB

Jun 10 2003 11:49:15:507AM 1030610010 John Rice 4.5 T, 3.5 MW RF
ITB at 1.4 s

Jun 10 2003 12:00:11:200PM 1030610011 John Rice 4.5 T, 3.5 MW RF
ITB late

Jun 10 2003 12:16:55:310PM 1030610012 John Rice 4.5 T, 1.5 MW RF
late H-mode, no ITB

Jun 10 2003 12:28:14:863PM 1030610013 John Rice 4.5 T, 2.5 MW RF
couple of ITBs

Jun 10 2003 12:46:44:507PM 1030610014 John Rice 4.5 T, 3.5 MW RF
good ITB

Jun 10 2003 12:55:38:057PM 1030610015 John Rice 4.5 T, 3.5 MW RF
late ITBs, many trips

Jun 10 2003 01:11:38:337PM 1030610016 John Rice 4.5 T, 3.5 MW RF
late ITB, many H-L transitions

Jun 10 2003 01:27:15:290PM 1030610017 John Rice 4.5 T, 2.5 MW RF
late ITB, many H-L transitions

Jun 10 2003 01:34:59:960PM 1030610018 John Rice 4.5 T, 3.5 MW RF
late ITB, many H-L transitions

Jun 10 2003 02:11:52:280PM 1030610019 John Rice 4.5 T, 3.5 MW RF
?

Jun 10 2003 02:12:07:700PM 1030610020 John Rice 6.5 T, 3.5 MW RF
many trips

Jun 10 2003 03:04:05:677PM 1030610021 John Rice test

Jun 10 2003 03:48:26:700PM 1030610022 John Rice test

Jun 10 2003 03:48:32:810PM 1030610023 John Rice test

Jun 10 2003 03:53:56:663PM 1030610024 John Rice 6.4 T, 2.5 MW
trips, no ITB

Jun 10 2003 04:07:06:563PM 1030610024 John Rice 6.4 T, 2.5 MW
trips, late, narrow ITB

Jun 10 2003 04:34:07:817PM 1030610025 John Rice 0 T, 0 MW
test

Jun 10 2003 04:48:57:567PM 1030610026 John Rice 5.4 T, 3 MW
no ITB

Jun 10 2003 04:59:17:977PM 1030610027 John Rice 5.4 T, 3 MW
no ITB

Jun 11 2003 10:25:51:883AM 1030610028 Earl Marmar This was really the first shot of June 11, 2003, but because of a data system quirk, is stored as 1030610028.

Decent plasma; got the decreased upper triangularity. Multiple H-modes, looking pretty ELM-free.

H/(H+D) = 0.6

~3.5 MW RF

Physics Operator Comments

Jun 10 2003 07:57:34:983AM Robert Granetz Engineering setup for Tuesday, 10 June 2003

Purpose: MP 303 - High Performance ITB's

Session leader: J. Rice
Physics operator: R. Granetz

ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00.
Bake at 60 C overnight as well, if possible.

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

If RF has fired into the vacuum chamber prior to the start of the run, then
we will need to do 10 minutes of ECDC before the first shot.

Power systems the same as on 1030605028 (0.8 MA, 5.4 T, lower single null)

A-coils should be hooked up as on 1030507027 (+Dtop -Dbot -Jtop +Jbot), but
the power supply should NOT be enabled.

Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid enabled (PG1)
fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC)
fill C-side with 30 psi D2 Hybrid enabled (PG3)

Enable the following gate valves, assuming no vacuum problems:
ECE, DNB

-------------------------------------------------------------------------------
RF Setup: All 4 transmitters in Run On by 08:00. We want 5 MW today.

-------------------------------------------------------------------------------
Run Plan: Start by getting good ITB's at 4.5 T, 0.8 MA, and 5 MW of ICRF
(off-axis on inboard side) At some point we will switch to 6.1 T,
1.2 MA, and 5 MW (off-axis on outboard side) to get high
performance ITB's. (A-coils will be needed for the 1.2 MA
discharges.) Obtain high quality Te, Ti, ne, and Vtor profiles.
Vary DNB timing relative to the ITB evolution.

Jun 10 2003 07:57:53:483AM Robert Granetz ECDC was done overnight, as well as a 60 C bake.

Hybrid coldstart done by the engineering group; no errors found

Loaded PCS segment 2 from shot 1030605028 (0.8 MA, 5.4 T, single
null lower), segment 1 from shot 1030606035 (last shot from last
Friday). Changed BT to be 4.5 T (125 kA) in segment 2.

Jun 10 2003 09:13:14:847AM 1030610001 Robert Granetz Shot 01 -- Plasma. Good shot. Prf=0.5+1.5+0=2 MW (D+E+J). Btor=4.58 T.
Ip=0.8 MA. Target nl_04=0.9e20 m-2. Great startup, even though
Br0=-2.6 mT ! No early hard x-rays. John thinks there was an
ITB (inboard resonance), but the core Thomson was not on for the
first shot. It will be on for the 2nd shot. GPC2 needs to be
recalibrated.

Next shot: increase argon puff by 10 ms. More RF power.

Jun 10 2003 09:25:32:137AM 1030610002 Robert Granetz Shot 02 -- Plasma. Good shot. Prf=0.5+1.5+0=2 MW. Horrible startup, huge
Br0, some hard x-rays, almost lost it. H/D=4-8%.

Next shot: increase Br0 by 0.25 mT (to 0.000 T)

Jun 10 2003 09:52:18:407AM 1030610003 Robert Granetz Shot 03 -- Plasma. Good shot. Good startup. Prf=0.6+1.4+1.6=3.1 MW.
No ITB's except at H-L back transitions. Now have my peaking
scope working with both ne0/nebar and xray_width.

Next shot: no PCS changes. More RF power.

Jun 10 2003 10:15:38:000AM 1030610004 Robert Granetz Shot 04 -- Plasma. Good shot. Good startup. Prf=0.7+1.4+1.1=3.2 MW.
Still no ITB's except at H-L back transitions.

Next shot: raise density by 10% (0.8e20 --> 0.9e20 m-2)

Jun 10 2003 10:29:30:947AM 1030610005 Robert Granetz Shot 05 -- No-power cycle. TCI failed before the shot, so I opted to turn
off the supplies rather than a wide open gas valve.

Jun 10 2003 10:59:04:470AM 1030610006 Robert Granetz Shot 06 -- Plasma. Good Shot. Startup was not as good as shot 04.
Target nl_04=1.0e20 m-2. Some hard x-rays. Still no ITB's
except for H-L back transitions.

Next shot: no PCS changes

Jun 10 2003 11:07:35:490AM 1030610007 Robert Granetz Shot 07 -- Plasma. Good shot. Prf=0.8+1.7+~0 = 2.5 MW. Still only have
the H-L back transition ITB's. Startup is not great, with some
hard x-rays.

Next shot: reduce Btor by 2% (from 4.58 to 4.50 T)

Jun 10 2003 11:27:41:213AM 1030610008 Robert Granetz Shot 08 -- Plasma. Good shot. Btor=4.50 T. No TCI data (camac problem), so
no ne peaking, but x-ray width indicates that ITB's formed before
the H-L back transitions, finally! Prf=0.9+1.5+~0=2.4 MW.
One of the TF joints is showing a high temperature.

Next shot: TF-only test shot (5.4 T) to check joint temperature.

Jun 10 2003 11:34:20:447AM 1030610009 Robert Granetz Shot 09 -- Test. 5.4 tesla TF-only shot to check joint resistance. Seems
to be okay on the TF scanner.

Next shot: back to plasma operation

Jun 10 2003 11:52:52:780AM 1030610010 Robert Granetz Shot 10 -- Plasma. Good shot. Btor=4.51 T. No H-mode ITB's.
Prf=0.9+1.4+1.1=3.4 MW. H/D=4-6%.

Next shot: no PCS changes.

Jun 10 2003 12:06:49:727PM 1030610011 Robert Granetz Shot 11 -- Plasma. Good shot. Prf=3.3 MW. No H-mode ITB's. H/D=6%.

Next shot: raise density another 10%.

Jun 10 2003 12:27:20:610PM 1030610012 Robert Granetz Shot 12 -- Plasma. Good shot. nl_04=1.1e20 m-2. Prf=0+1.5+0=1.5 MW, so
only got one H-mode. Great startup; no hard x-rays.

Next shot: no PCS changes.

Jun 10 2003 12:36:05:283PM 1030610013 Robert Granetz Shot 13 -- Plasma. Good shot. Prf=1.0+1.5+0=2.5 MW. H/D=4-6%. Good startup.
Nl H-mode ITB's.

Next shot: no PCS changes.

Jun 10 2003 12:48:49:743PM 1030610014 Robert Granetz Shot 14 -- Plasma. Good shot. Got a good ITB on the 2nd H-mode! Good
startup. Prf=0.9+1.4+1.1=3.4 MW. H/D=4-5%.

Next shot: reduce Btor by another 1% (I_TF=121500 A)). Increase
argon puff by another 10 ms.

Jun 10 2003 12:58:59:983PM 1030610015 Robert Granetz Shot 15 -- Plasma. Good shot. No H-mode ITB's Prf=0.9+1.4+1.1=3.4 MW.
H/D=4-6%. Good startup.

Next shot: add the 1% back to Btor.

Jun 10 2003 01:12:11:197PM 1030610016 Robert Granetz Shot 16 -- Plasma. Good shot. Got another ITB on the final H-mode!
Prf=1.0+1.4+1.0=3.4 MW. H/D=4-6%. Good startup.

Next shot: no PCS changes.

Jun 10 2003 01:29:24:290PM 1030610018 Robert Granetz Shot 17 -- Plasma. Good shot. Got another ITB on the final H-mode.
Prf=1.0+1.4+1.0=3.4 MW. H/D=4-6%. Good startup.

Next shot: no PCS changes.

Jun 10 2003 01:42:48:083PM 1030610018 Robert Granetz Shot 18 -- Plasma. Good shot. Another H-mode ITB, but not as clear as the
previous ones today. Prf=1.0+1.4+1.0=3.4 MW. H/D=6%.

Next shot: no PCS changes. The DNB is firing at t=1.35 s.

Jun 10 2003 01:59:47:460PM 1030610019 Robert Granetz Shot 19 -- Plasma. Good shot. Bad startup, lots of hard x-rays. TCI failed
on channel 4. Density feedback failed. J-port RF dropped out
early. No ITBs.

Next shot: go to other half of the MP. Raise Bt to 6.4 T, Ip
to 0.9 MA. Decrease density to nl_04=0.8e20 m-2.

Jun 10 2003 02:29:31:500PM 1030610020 Robert Granetz Shot 20 -- Plasma. Full-length shot, but TF crowbarred. Bt=6.4 T, Ip=0.9 MA.
TCI failed again -- no feedback, so density was too high.
Prf=3.3 --> 2 --> 1 MW. Multiple H-modes, but no ITB's. The
paragon server node crashed, so all of the paragon PC's will have
to be rebooted before the next shot. The DNB suddenly developed
a problem with the beam current signal.

Next shot: TF-only test.

Jun 10 2003 03:03:31:863PM 1030610021 Robert Granetz Shot 21 -- Test. TF-only, 50 kA. OK

Next shot: 150 kA TF-only test.

Jun 10 2003 03:33:25:360PM 1030610022 Robert Granetz Shot 22 -- No power. Should have been a 150 kA TF-only test.

Next shot: 150 kA TF-only test.

Jun 10 2003 03:39:43:603PM 1030610023 Robert Granetz Shot 23 -- Test. TF-only, 150 kA. OK

Next shot: back to 6.4 T plasma operation

Jun 10 2003 04:33:20:363PM 1030610024 Robert Granetz Shot 24 -- Plasma. Good shot, but the TF crowbarred again. BT=6.4 T,
Ip=0.9 MA, Prf=~0 + 1.4+1.1=2.5 MW. H/D=7%. I think this
had a long ITB (from 1.3 to 1.5 s) during the H-mode, judging
from the x-ray peaking. Dmitri reports that the Thomson shows
a very small diameter peaked region.

Next shot: 50 kA TF-only test.

Jun 10 2003 04:34:27:977PM 1030610025 Robert Granetz Shot 25 -- Test. 50 kA TF-only test. OK

Next shot: plasma, with Bt=5.4 T, Ip=0.8 MA

Jun 10 2003 04:51:03:773PM 1030610026 Robert Granetz Shot 26 -- Plasma. Good shot. Btor=5.4 T, Ip=0.8 MA, nl (target) = 0.9e20 m-2
Prf=0.5+1.4+1.1=3.0 MW. H/D=6-8%. H-modes, no ITBs.

Next shot: get a start on tomorrow's run. Load segment 2 from
1030529016, except reduce nl_04 to 1.0e20 m-2, and turn on the
A-coils in the normal suppression configuration. Bt=5.4 T,
Ip=1.0 MA.

Jun 10 2003 05:14:29:317PM 1030610027 Robert Granetz Shot 27 -- Plasma. Good shot. Bt=5.4, Ip=1.0 MA, nl(target)=1.1e20 m-2, and
Prf=3.0-3.6 MW. Lots of short (ELM-free?) H-modes. Startup was
bad though.

End of run.

Jun 10 2003 05:15:18:130PM 1030610027 Robert Granetz Physics operator summary for run 1030610 (Tuesday):

MP 303 - High Performance ITB's

Session leader: J. Rice
Physics operator: R. Granetz
Engineers in charge:

Summary: We got some short H-mode ITB's with inboard-side resonance on
shots 14, 16, 17, and 18 (4.5 T, 0.8 MA, Prf=3.4 MW). We then
switched to 6.4 T to do outboard-side resonance on shots 20 and
24. We got full-length plasmas on both shots, but the TF
crowbarred both times, necessitating long delays and multiple
TF-only test shots. Nevertheless, I think shot 24 had a long
ITB (t=1.3-1.5 s). The x-ray profile was very narrow, and the
Thomson profiles were peaked, but over a very small radius
(consistent with John Rice's previous observations.)

Other than the crowbars, the machine ran well. There were no
fizzles or duds, and all shots had full rampdowns. There were no
disruptions. After shot 20, the network server for the paragon
stations crashed, necessitating a reboot of all the paragon
stations.

Scorecard: 21 plasmas
0 fizzles
0 duds
6 test or no-power shot cycle
0 aborted and/or screwed up by computer problems
----------
27 total

Jun 11 2003 10:19:22:023AM 1030610028 Joseph Snipes Shot 28: Copied shot 1030610027 but changed ZXU and RXU to reproduce 1001013002, which had lower upper
triangularity. Also increased CLEARIN by 0.005 m at 0.43 s to attempt to avoid touching the
inner wall at crossover. Good shot with several H-modes.

Jun 11 2003 10:21:15:853AM 1030610028 Joseph Snipes Shot 28: Copied shot 1030610027 but changed ZXU and RXU to reproduce 1001013002, which had lower upper
triangularity. Also increased CLEARIN by 0.005 m at 0.43 s to attempt to avoid touching the
inner wall at crossover. Good shot with several H-modes. Due to a Josh error, the first shot
of 1030611 was written as 1030610028.

Engineering Operator Comments

Shot Time Type Status Comment

1 08:58:31:303AM Plasma Ok

2 09:17:16:810AM Plasma Ok

3 09:41:24:980AM Plasma Ok

4 09:55:26:850AM Plasma Ok

5 10:22:34:323AM Plasma Ok

6 10:45:45:917AM Plasma Ok

7 10:59:59:410AM Plasma Ok

8 11:13:21:390AM Plasma Ok

9 11:27:45:353AM Test Ok TF Joint Resistance Test

10 11:41:55:100AM Plasma Ok

11 11:55:09:877AM Plasma Ok

12 12:09:49:263PM Plasma Ok

13 12:23:22:383PM Plasma Ok

14 12:36:48:283PM Plasma Ok

15 12:49:48:370PM Plasma Ok

16 01:03:08:133PM Plasma Ok

17 01:16:17:080PM Plasma Ok

18 01:29:16:963PM Plasma Ok

19 01:46:10:790PM Plasma Ok

20 02:04:05:000PM Plasma Bad TF type 1

21 02:58:27:103PM Test Ok TF 50ka test

22 03:15:47:073PM Test Ok NO TF

23 03:35:25:160PM Test Ok TF 150kA

24 03:48:14:853PM Plasma Bad TF self powered circuit fired

25 04:28:27:103PM Test Ok

26 04:39:47:750PM Plasma Ok

27 04:54:38:123PM Plasma Ok

28 10:15:40:603AM Plasma Ok

Session Leader Comments
Jun 10 2003 09:08:20:540AM	1030610001	John Rice	4.6 T, 2 MW ICRF w/ some trips some indication of an ITB at 1.1 s
Jun 10 2003 09:27:35:563AM	1030610002	John Rice	4.6 T, 2 MW ICRF ITB? who knows?
Jun 10 2003 09:52:38:313AM	1030610003	John Rice	4.6 T, 3 MW ICRF ITB? H-L transition at .95 s spoiled it
Jun 10 2003 10:05:57:697AM	1030610004	John Rice	4.6 T, 3 MW ICRF no ITB, too many H-L transitions
Jun 10 2003 10:51:39:317AM	1030610005	John Rice	no power shot
Jun 10 2003 10:51:25:753AM	1030610006	John Rice	ugly
Jun 10 2003 11:06:22:893AM	1030610007	John Rice	4.58 T, 1.5 MW RF ITB at 1.3 s
Jun 10 2003 11:25:18:897AM	1030610008	John Rice	4.5 T, 2 MW RF ITB? no
Jun 10 2003 11:36:47:967AM	1030610009	John Rice	0 T, 0 MW RF no ITB
Jun 10 2003 11:49:15:507AM	1030610010	John Rice	4.5 T, 3.5 MW RF ITB at 1.4 s
Jun 10 2003 12:00:11:200PM	1030610011	John Rice	4.5 T, 3.5 MW RF ITB late
Jun 10 2003 12:16:55:310PM	1030610012	John Rice	4.5 T, 1.5 MW RF late H-mode, no ITB
Jun 10 2003 12:28:14:863PM	1030610013	John Rice	4.5 T, 2.5 MW RF couple of ITBs
Jun 10 2003 12:46:44:507PM	1030610014	John Rice	4.5 T, 3.5 MW RF good ITB
Jun 10 2003 12:55:38:057PM	1030610015	John Rice	4.5 T, 3.5 MW RF late ITBs, many trips
Jun 10 2003 01:11:38:337PM	1030610016	John Rice	4.5 T, 3.5 MW RF late ITB, many H-L transitions
Jun 10 2003 01:27:15:290PM	1030610017	John Rice	4.5 T, 2.5 MW RF late ITB, many H-L transitions
Jun 10 2003 01:34:59:960PM	1030610018	John Rice	4.5 T, 3.5 MW RF late ITB, many H-L transitions
Jun 10 2003 02:11:52:280PM	1030610019	John Rice	4.5 T, 3.5 MW RF ?
Jun 10 2003 02:12:07:700PM	1030610020	John Rice	6.5 T, 3.5 MW RF many trips
Jun 10 2003 03:04:05:677PM	1030610021	John Rice	test
Jun 10 2003 03:48:26:700PM	1030610022	John Rice	test
Jun 10 2003 03:48:32:810PM	1030610023	John Rice	test
Jun 10 2003 03:53:56:663PM	1030610024	John Rice	6.4 T, 2.5 MW trips, no ITB
Jun 10 2003 04:07:06:563PM	1030610024	John Rice	6.4 T, 2.5 MW trips, late, narrow ITB
Jun 10 2003 04:34:07:817PM	1030610025	John Rice	0 T, 0 MW test
Jun 10 2003 04:48:57:567PM	1030610026	John Rice	5.4 T, 3 MW no ITB
Jun 10 2003 04:59:17:977PM	1030610027	John Rice	5.4 T, 3 MW no ITB
Jun 11 2003 10:25:51:883AM	1030610028	Earl Marmar	This was really the first shot of June 11, 2003, but because of a data system quirk, is stored as 1030610028. Decent plasma; got the decreased upper triangularity. Multiple H-modes, looking pretty ELM-free. H/(H+D) = 0.6 ~3.5 MW RF

Physics Operator Comments
Jun 10 2003 07:57:34:983AM		Robert Granetz	Engineering setup for Tuesday, 10 June 2003 Purpose: MP 303 - High Performance ITB's Session leader: J. Rice Physics operator: R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well, if possible. Run begins at 09:00 and ends at 17:00. If RF has fired into the vacuum chamber prior to the start of the run, then we will need to do 10 minutes of ECDC before the first shot. Power systems the same as on 1030605028 (0.8 MA, 5.4 T, lower single null) A-coils should be hooked up as on 1030507027 (+Dtop -Dbot -Jtop +Jbot), but the power supply should NOT be enabled. Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB ------------------------------------------------------------------------------- RF Setup: All 4 transmitters in Run On by 08:00. We want 5 MW today. ------------------------------------------------------------------------------- Run Plan: Start by getting good ITB's at 4.5 T, 0.8 MA, and 5 MW of ICRF (off-axis on inboard side) At some point we will switch to 6.1 T, 1.2 MA, and 5 MW (off-axis on outboard side) to get high performance ITB's. (A-coils will be needed for the 1.2 MA discharges.) Obtain high quality Te, Ti, ne, and Vtor profiles. Vary DNB timing relative to the ITB evolution.
Jun 10 2003 07:57:53:483AM		Robert Granetz	ECDC was done overnight, as well as a 60 C bake. Hybrid coldstart done by the engineering group; no errors found Loaded PCS segment 2 from shot 1030605028 (0.8 MA, 5.4 T, single null lower), segment 1 from shot 1030606035 (last shot from last Friday). Changed BT to be 4.5 T (125 kA) in segment 2.
Jun 10 2003 09:13:14:847AM	1030610001	Robert Granetz	Shot 01 -- Plasma. Good shot. Prf=0.5+1.5+0=2 MW (D+E+J). Btor=4.58 T. Ip=0.8 MA. Target nl_04=0.9e20 m-2. Great startup, even though Br0=-2.6 mT ! No early hard x-rays. John thinks there was an ITB (inboard resonance), but the core Thomson was not on for the first shot. It will be on for the 2nd shot. GPC2 needs to be recalibrated. Next shot: increase argon puff by 10 ms. More RF power.
Jun 10 2003 09:25:32:137AM	1030610002	Robert Granetz	Shot 02 -- Plasma. Good shot. Prf=0.5+1.5+0=2 MW. Horrible startup, huge Br0, some hard x-rays, almost lost it. H/D=4-8%. Next shot: increase Br0 by 0.25 mT (to 0.000 T)
Jun 10 2003 09:52:18:407AM	1030610003	Robert Granetz	Shot 03 -- Plasma. Good shot. Good startup. Prf=0.6+1.4+1.6=3.1 MW. No ITB's except at H-L back transitions. Now have my peaking scope working with both ne0/nebar and xray_width. Next shot: no PCS changes. More RF power.
Jun 10 2003 10:15:38:000AM	1030610004	Robert Granetz	Shot 04 -- Plasma. Good shot. Good startup. Prf=0.7+1.4+1.1=3.2 MW. Still no ITB's except at H-L back transitions. Next shot: raise density by 10% (0.8e20 --> 0.9e20 m-2)
Jun 10 2003 10:29:30:947AM	1030610005	Robert Granetz	Shot 05 -- No-power cycle. TCI failed before the shot, so I opted to turn off the supplies rather than a wide open gas valve.
Jun 10 2003 10:59:04:470AM	1030610006	Robert Granetz	Shot 06 -- Plasma. Good Shot. Startup was not as good as shot 04. Target nl_04=1.0e20 m-2. Some hard x-rays. Still no ITB's except for H-L back transitions. Next shot: no PCS changes
Jun 10 2003 11:07:35:490AM	1030610007	Robert Granetz	Shot 07 -- Plasma. Good shot. Prf=0.8+1.7+~0 = 2.5 MW. Still only have the H-L back transition ITB's. Startup is not great, with some hard x-rays. Next shot: reduce Btor by 2% (from 4.58 to 4.50 T)
Jun 10 2003 11:27:41:213AM	1030610008	Robert Granetz	Shot 08 -- Plasma. Good shot. Btor=4.50 T. No TCI data (camac problem), so no ne peaking, but x-ray width indicates that ITB's formed before the H-L back transitions, finally! Prf=0.9+1.5+~0=2.4 MW. One of the TF joints is showing a high temperature. Next shot: TF-only test shot (5.4 T) to check joint temperature.
Jun 10 2003 11:34:20:447AM	1030610009	Robert Granetz	Shot 09 -- Test. 5.4 tesla TF-only shot to check joint resistance. Seems to be okay on the TF scanner. Next shot: back to plasma operation
Jun 10 2003 11:52:52:780AM	1030610010	Robert Granetz	Shot 10 -- Plasma. Good shot. Btor=4.51 T. No H-mode ITB's. Prf=0.9+1.4+1.1=3.4 MW. H/D=4-6%. Next shot: no PCS changes.
Jun 10 2003 12:06:49:727PM	1030610011	Robert Granetz	Shot 11 -- Plasma. Good shot. Prf=3.3 MW. No H-mode ITB's. H/D=6%. Next shot: raise density another 10%.
Jun 10 2003 12:27:20:610PM	1030610012	Robert Granetz	Shot 12 -- Plasma. Good shot. nl_04=1.1e20 m-2. Prf=0+1.5+0=1.5 MW, so only got one H-mode. Great startup; no hard x-rays. Next shot: no PCS changes.
Jun 10 2003 12:36:05:283PM	1030610013	Robert Granetz	Shot 13 -- Plasma. Good shot. Prf=1.0+1.5+0=2.5 MW. H/D=4-6%. Good startup. Nl H-mode ITB's. Next shot: no PCS changes.
Jun 10 2003 12:48:49:743PM	1030610014	Robert Granetz	Shot 14 -- Plasma. Good shot. Got a good ITB on the 2nd H-mode! Good startup. Prf=0.9+1.4+1.1=3.4 MW. H/D=4-5%. Next shot: reduce Btor by another 1% (I_TF=121500 A)). Increase argon puff by another 10 ms.
Jun 10 2003 12:58:59:983PM	1030610015	Robert Granetz	Shot 15 -- Plasma. Good shot. No H-mode ITB's Prf=0.9+1.4+1.1=3.4 MW. H/D=4-6%. Good startup. Next shot: add the 1% back to Btor.
Jun 10 2003 01:12:11:197PM	1030610016	Robert Granetz	Shot 16 -- Plasma. Good shot. Got another ITB on the final H-mode! Prf=1.0+1.4+1.0=3.4 MW. H/D=4-6%. Good startup. Next shot: no PCS changes.
Jun 10 2003 01:29:24:290PM	1030610018	Robert Granetz	Shot 17 -- Plasma. Good shot. Got another ITB on the final H-mode. Prf=1.0+1.4+1.0=3.4 MW. H/D=4-6%. Good startup. Next shot: no PCS changes.
Jun 10 2003 01:42:48:083PM	1030610018	Robert Granetz	Shot 18 -- Plasma. Good shot. Another H-mode ITB, but not as clear as the previous ones today. Prf=1.0+1.4+1.0=3.4 MW. H/D=6%. Next shot: no PCS changes. The DNB is firing at t=1.35 s.
Jun 10 2003 01:59:47:460PM	1030610019	Robert Granetz	Shot 19 -- Plasma. Good shot. Bad startup, lots of hard x-rays. TCI failed on channel 4. Density feedback failed. J-port RF dropped out early. No ITBs. Next shot: go to other half of the MP. Raise Bt to 6.4 T, Ip to 0.9 MA. Decrease density to nl_04=0.8e20 m-2.
Jun 10 2003 02:29:31:500PM	1030610020	Robert Granetz	Shot 20 -- Plasma. Full-length shot, but TF crowbarred. Bt=6.4 T, Ip=0.9 MA. TCI failed again -- no feedback, so density was too high. Prf=3.3 --> 2 --> 1 MW. Multiple H-modes, but no ITB's. The paragon server node crashed, so all of the paragon PC's will have to be rebooted before the next shot. The DNB suddenly developed a problem with the beam current signal. Next shot: TF-only test.
Jun 10 2003 03:03:31:863PM	1030610021	Robert Granetz	Shot 21 -- Test. TF-only, 50 kA. OK Next shot: 150 kA TF-only test.
Jun 10 2003 03:33:25:360PM	1030610022	Robert Granetz	Shot 22 -- No power. Should have been a 150 kA TF-only test. Next shot: 150 kA TF-only test.
Jun 10 2003 03:39:43:603PM	1030610023	Robert Granetz	Shot 23 -- Test. TF-only, 150 kA. OK Next shot: back to 6.4 T plasma operation
Jun 10 2003 04:33:20:363PM	1030610024	Robert Granetz	Shot 24 -- Plasma. Good shot, but the TF crowbarred again. BT=6.4 T, Ip=0.9 MA, Prf=~0 + 1.4+1.1=2.5 MW. H/D=7%. I think this had a long ITB (from 1.3 to 1.5 s) during the H-mode, judging from the x-ray peaking. Dmitri reports that the Thomson shows a very small diameter peaked region. Next shot: 50 kA TF-only test.
Jun 10 2003 04:34:27:977PM	1030610025	Robert Granetz	Shot 25 -- Test. 50 kA TF-only test. OK Next shot: plasma, with Bt=5.4 T, Ip=0.8 MA
Jun 10 2003 04:51:03:773PM	1030610026	Robert Granetz	Shot 26 -- Plasma. Good shot. Btor=5.4 T, Ip=0.8 MA, nl (target) = 0.9e20 m-2 Prf=0.5+1.4+1.1=3.0 MW. H/D=6-8%. H-modes, no ITBs. Next shot: get a start on tomorrow's run. Load segment 2 from 1030529016, except reduce nl_04 to 1.0e20 m-2, and turn on the A-coils in the normal suppression configuration. Bt=5.4 T, Ip=1.0 MA.
Jun 10 2003 05:14:29:317PM	1030610027	Robert Granetz	Shot 27 -- Plasma. Good shot. Bt=5.4, Ip=1.0 MA, nl(target)=1.1e20 m-2, and Prf=3.0-3.6 MW. Lots of short (ELM-free?) H-modes. Startup was bad though. End of run.
Jun 10 2003 05:15:18:130PM	1030610027	Robert Granetz	Physics operator summary for run 1030610 (Tuesday): MP 303 - High Performance ITB's Session leader: J. Rice Physics operator: R. Granetz Engineers in charge: Summary: We got some short H-mode ITB's with inboard-side resonance on shots 14, 16, 17, and 18 (4.5 T, 0.8 MA, Prf=3.4 MW). We then switched to 6.4 T to do outboard-side resonance on shots 20 and 24. We got full-length plasmas on both shots, but the TF crowbarred both times, necessitating long delays and multiple TF-only test shots. Nevertheless, I think shot 24 had a long ITB (t=1.3-1.5 s). The x-ray profile was very narrow, and the Thomson profiles were peaked, but over a very small radius (consistent with John Rice's previous observations.) Other than the crowbars, the machine ran well. There were no fizzles or duds, and all shots had full rampdowns. There were no disruptions. After shot 20, the network server for the paragon stations crashed, necessitating a reboot of all the paragon stations. Scorecard: 21 plasmas 0 fizzles 0 duds 6 test or no-power shot cycle 0 aborted and/or screwed up by computer problems ---------- 27 total
Jun 11 2003 10:19:22:023AM	1030610028	Joseph Snipes	Shot 28: Copied shot 1030610027 but changed ZXU and RXU to reproduce 1001013002, which had lower upper triangularity. Also increased CLEARIN by 0.005 m at 0.43 s to attempt to avoid touching the inner wall at crossover. Good shot with several H-modes.
Jun 11 2003 10:21:15:853AM	1030610028	Joseph Snipes	Shot 28: Copied shot 1030610027 but changed ZXU and RXU to reproduce 1001013002, which had lower upper triangularity. Also increased CLEARIN by 0.005 m at 0.43 s to attempt to avoid touching the inner wall at crossover. Good shot with several H-modes. Due to a Josh error, the first shot of 1030611 was written as 1030610028.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:58:31:303AM	Plasma	Ok
2	09:17:16:810AM	Plasma	Ok
3	09:41:24:980AM	Plasma	Ok
4	09:55:26:850AM	Plasma	Ok
5	10:22:34:323AM	Plasma	Ok
6	10:45:45:917AM	Plasma	Ok
7	10:59:59:410AM	Plasma	Ok
8	11:13:21:390AM	Plasma	Ok
9	11:27:45:353AM	Test	Ok	TF Joint Resistance Test
10	11:41:55:100AM	Plasma	Ok
11	11:55:09:877AM	Plasma	Ok
12	12:09:49:263PM	Plasma	Ok
13	12:23:22:383PM	Plasma	Ok
14	12:36:48:283PM	Plasma	Ok
15	12:49:48:370PM	Plasma	Ok
16	01:03:08:133PM	Plasma	Ok
17	01:16:17:080PM	Plasma	Ok
18	01:29:16:963PM	Plasma	Ok
19	01:46:10:790PM	Plasma	Ok
20	02:04:05:000PM	Plasma	Bad	TF type 1
21	02:58:27:103PM	Test	Ok	TF 50ka test
22	03:15:47:073PM	Test	Ok	NO TF
23	03:35:25:160PM	Test	Ok	TF 150kA
24	03:48:14:853PM	Plasma	Bad	TF self powered circuit fired
25	04:28:27:103PM	Test	Ok
26	04:39:47:750PM	Plasma	Ok
27	04:54:38:123PM	Plasma	Ok
28	10:15:40:603AM	Plasma	Ok