Alcator C-Mod Run 1001012 Information

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Miniproposals
Miniproposal:267
Date Filed: 4/4/2000
Title:Dependence of SOL Fluctuations and Particle Transport on Collisionality
First Author:Brian Labombard
Session Leader:Brian Labombard (shots 1-22)

Operators
Session leader(s):Brian Labombard
Physics operator(s):Jim Irby
Engineering operator(s):Bill Parkin,Ed Fitzgerald

Engineering Operator Run Comment
MP267 SOL Fluctuations (Ohmic) PO:Irby SL:LaBombard EO:Fitzgerald/Parkin

Session Leader Plans

Physics Operators Plans

Session Leader Summaries
Entered: Jul 7 2004 03:49:25:070PM
Author: To Be Determined
MP#267
Redo of "Dependence of SOL Fluctuations and Particle Transport on Collisionality" - Day 1

Session Leader - B. LaBombard
Phys Op - J. Irby

==============================================================================
Overall objectives of MP#267:

"The purpose of these experiments is to explore the dependence of
SOL fluctuation characteristics and attendant cross-field particle
transport on the collisionality of the SOL."

Reason for today's run:

The purpose of today's run was to redo the first run day outlined in MP#267.
The last time we ran this MP, the Lyman-alpha array was not operating. Also
we did not get a lot of good plasmas. The goal was to complete a fine density
scan with ASP and FSP probes reaching the separatrix and with the Lyman-alpha
array working.

Today's result:

We were very successful today. We got the fine density scan we were looking for,
with ASP,FSP & Ly-alpha systems operating. As a bonus, we also got a lot of
CII and CIII plume images from the 'burping' FSP probe (see Sanjay's entries under
the EDGE topic in the logbook). From these, we hope to infer the magnitude of Er
and perhaps its variation across the SOL under a variety of collisionalities.

We even got a couple of ohmic H-modes at Bt=5.2 tesla and Ip=0.8 MA! (see shots 12
and 13). The first time this happened the ASP got toasted because the targeting changed
during th H-mode. This resulting in a disruption - oops! On shot 13, we eliminated the
third probe scan (at 1.2 seconds) and the Ohmic H-mode occurred again, this time evolving
from Elm-free to a dithering mode without a disruption. By the way, the ohmic H-modes
occurred despite the fact that we were injecting C2D4 from the burping probe on
every shot, beginning with shot 3. (Those who worry about the amount of C2D4 that we
inject from the burping probe and its impact on the plasma, please take note.)

We were hoping that we might find evidence of a negative Er near the separatrix
in low density ohmic L-mode plasmas. But, even with the probe inserted as deep
as we dared, no negative Er was detected.

Analysis of data from this set of discharges should allow us to compute Deff
profiles across the SOL for a variety of collisionalities and to relate changes in
particle transport to fluctuation characteristics. On this run day, the ASP probe
head had a North-South probe spacing of 6 mm, while on the previous attempt (100517)
the probe spacing was 4 mm. A comparison of fluctuation spectra obtained by
the two probe arrangements could be enlightening.

Shot notes:

Shot 1 - 0.8 MA, 5.2 tesla, NL04 around 1, no probes firing.

Shot 2 - NL04 around .85
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
No C2D4 injected on this shot.
ASP and FSP make it to LCFS

Shot 3 - NL04 around .85
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on for this shot and the rest of the run
Plasma disrupts at .72 seconds, probably from ASP being over-inserted.

Shot 4 - NL04 around .8
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
ASP still over-inserted on first and third scans.

Shot 5 - NL04 around .8
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
Nice data on both probes for all three scans.

Shot 6 - NL04 around .75 and ramping
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
Some arcing on ASP on the third scan.

Shot 7 - NL04 around .6
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
Nice data on all scans.

Shot 8 - NL04 around .51
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.
Nice data on all scans.

Shot 9 - NL04 around .51
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP pulled out by 4 mm to 'base' of sharp density gradient to look for Er shear with plumes
Nice data on all scans.

Shot 10 - NL04 around .61
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP pulled out by 4 mm to 'base' of sharp density gradient to look for Er shear with plumes
Again, nice data on all scans.

Shot 11 - NL04 around .61
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile
Nice data on all scans.

Shot 12 - NL04 around .75
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile
Goes into H-mode at 1.1 seconds!!
H-mode ends up toasting the ASP during the third scan and causing a disruption!

Shot 13 - NL04 around .75
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5 seconds
FSP at 'bottom' of steep density profile
Goes into H-mode at 1.03 seconds!!
Good data on two probe scans.

Shot 14 - NL04 around .75
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'bottom' of steep density profile
First ASP scan a little toasty.
FSP data look good.

Shot 15 - NL04 around .84
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile
Nice data on all scans.

Shot 16 - NL04 around .91
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile
Nice data on all scans.

Shot 17 - NL04 around 1.0
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile
Nice data on all scans.

Shot 18 - NL04 around 1.05 ramping to 1.1
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile on first scan.
Nice data on all scans.

Shot 20 - NL04 around 1.1 ramping to 1.25
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile on first scan.
Nice data on all scans.

Shot 21 - NL04 around 1.2 ramping to 1.38
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile on first scan.
Nice data on all scans.

Shot 22 - NL04 around 1.04 ramping to 1.12
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
FSP at 'top' of steep density profile on first scan.
Nice data on all scans.

- An excellent run!

Physics Operator Summaries
Entered: Jul 7 2004 04:37:12:270PM
Author: To Be Determined
Engineering Setup for Thursday, 12 October, Run 1001012

MP267---SOL Fluctuations (Ohmic)

SL: LaBombard
EO: Fitzgerald
PO: Irby

Engineering setup:
-------------------

Overnight ECDC in D2, stopping 1-2 hours before run.

Run begins 9:00 and ends at 17:00

Power System Setup: Same as on 1001011020

Gas setup

fill B-top with 6 psi of D2 Hybrid enabled
fill B-side lower with 1 psi of Ar Hybrid DISABLED
fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC
fill C-side with 30 psi of D2 Hybrid enabled

Prepare for the possibility of probe injections of C2D4

The following gate valves should be enabled: The BEAST, ECE, VUV



Summary

It was a fine day to be a PhysOp. Every shot did pretty much
what the SL wanted except when the IGT fault prevented a HV
gas enable. No fizzles.

We began with some tweaks to ZXL and the outer gap to prepare
for the probes.

Several H-modes (shot 13 for example) were produced during the day,
also several shots dithered strongly.

Problems

Lost shot 3 early because of an A-port probe over-insertion.

Lost IGT.

Score

plasmas : 21
fizzles : 00
duds : 01 --- no gas HV enable, no IGT
tests : 00

Details

----------------------------------------------------------------------------
1001012xxx irby PHYSICS_OPERATOR Oct 12 2000 5:31:26:436PM
. . . . . . . . . . . . . . . . . . . .
Engineering Setup for Thursday, 12 October, Run 1001012

MP267---SOL Fluctuations (Ohmic)

SL: LaBombard
EO: Fitzgerald/Parkin
PO: Irby

Engineering setup:
-------------------

Overnight ECDC in D2, stopping 1-2 hours before run.

Run begins 9:00 and ends at 17:00

Power System Setup: Same as on 1001011020

Gas setup

fill B-top with 6 psi of D2 Hybrid enabled
fill B-side lower with 1 psi of Ar Hybrid DISABLED
fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC
fill C-side with 30 psi of D2 Hybrid enabled

Prepare for the possibility of probe injections of C2D4

The following gate valves should be enabled: The BEAST, ECE, VUV


Cold Start Done:

rtnode -- data loaded, A matrix responds
rtnode -- data loaded, M matrix responds
rtnode -- data loaded, PID matrix responds
RT_NODE Done
12-OCT-2000 07:27:32.76
----------------------------------------------------------------------------
1001012001 irby PHYSICS_OPERATOR Oct 12 2000 9:07:48:093AM
. . . . . . . . . . . . . . . . . . . .
Plasma into rampdown, H/D 5%
----------------------------------------------------------------------------
1001012002 irby PHYSICS_OPERATOR Oct 12 2000 9:32:51:013AM
. . . . . . . . . . . . . . . . . . . .
Fixed ZXL at -.00626 at 0.8 s, and ramped it down to
-.08 by 1.48 s.

Ramped RCUR out by 1.5 mm from .5 to 1.0 s to try and keep
right gap constant for probe.

Plasma to rampdown
----------------------------------------------------------------------------
1001012003 irby PHYSICS_OPERATOR Oct 12 2000 9:54:44:170AM
. . . . . . . . . . . . . . . . . . . .
Increased RCUR by 1 mm. Last adjustment to extreme for
probe.


Plasma to 0.71 s, looks like A-port probe did us in
----------------------------------------------------------------------------
1001012004 irby PHYSICS_OPERATOR Oct 12 2000 10:11:02:746AM
. . . . . . . . . . . . . . . . . . . .
Repeat shot 3 w/o probe induced disruption

Plasma to rampdown

Brian seems happy with plasma
----------------------------------------------------------------------------
1001012005 irby PHYSICS_OPERATOR Oct 12 2000 10:32:48:466AM
. . . . . . . . . . . . . . . . . . . .
Repeat

Plasma into rampdown
----------------------------------------------------------------------------
1001012006 irby PHYSICS_OPERATOR Oct 12 2000 11:19:49:730AM
. . . . . . . . . . . . . . . . . . . .
Starting Brian's density scan --- NL04 from 8e19 to 7e19 /m^2

Plasma to rampdown, density lower but ramping up a little, gas was off
by 1.0 s

H/D about 6%

Note that we have dithering on the h-alpha signal
----------------------------------------------------------------------------
1001012007 irby PHYSICS_OPERATOR Oct 12 2000 11:18:45:480AM
. . . . . . . . . . . . . . . . . . . .
NL04 to 6e19 /m^2

Plasma to rampdown, density lower and flatter, H/D 5-6%
----------------------------------------------------------------------------
1001012008 irby PHYSICS_OPERATOR Oct 12 2000 11:53:44:500AM
. . . . . . . . . . . . . . . . . . . .
NL04 to 5e19 /m^2

BP 2.2e-6 Torr at init

Plasma to rampdown, lower NL
----------------------------------------------------------------------------
1001012009 irby PHYSICS_OPERATOR Oct 12 2000 12:02:54:903PM
. . . . . . . . . . . . . . . . . . . .
Repeat --- Brian liked last shot

Plasma to rampdown
----------------------------------------------------------------------------
1001012010 irby PHYSICS_OPERATOR Oct 12 2000 12:30:53:780PM
. . . . . . . . . . . . . . . . . . . .
NL04 back to 6e19 /m^2

Plasma to rampdown, H/D 5-6%
----------------------------------------------------------------------------
1001012011 irby PHYSICS_OPERATOR Oct 12 2000 12:45:28:890PM
. . . . . . . . . . . . . . . . . . . .
Repeat

Plasma to rampdown
----------------------------------------------------------------------------
1001012012 irby PHYSICS_OPERATOR Oct 12 2000 1:12:50:060PM
. . . . . . . . . . . . . . . . . . . .
NL04 to 7e19 / m^2

Lost plasma at 1.2 s or so... blame the probe

We went into H-Mode making ASP very unhappy
----------------------------------------------------------------------------
1001012013 irby PHYSICS_OPERATOR Oct 12 2000 1:39:42:140PM
. . . . . . . . . . . . . . . . . . . .
Repeat

Plasma to rampdown

Nice H-mode at 1 s
----------------------------------------------------------------------------
1001012014 irby PHYSICS_OPERATOR Oct 12 2000 1:57:34:780PM
. . . . . . . . . . . . . . . . . . . .
NL04 up to 8e19 / m^3

Plasma into rampdown, no H-mode
----------------------------------------------------------------------------
1001012015 irby PHYSICS_OPERATOR Oct 12 2000 2:21:26:716PM
. . . . . . . . . . . . . . . . . . . .
Repeat

Plasma to rampdown
----------------------------------------------------------------------------
1001012016 irby PHYSICS_OPERATOR Oct 12 2000 2:48:43:843PM
. . . . . . . . . . . . . . . . . . . .
NL04 to 9e19 / m^2

plasma to rampdown
----------------------------------------------------------------------------
1001012017 irby PHYSICS_OPERATOR Oct 12 2000 3:11:25:780PM
. . . . . . . . . . . . . . . . . . . .
NL04 to 1.0e20 / m^2

Plasma into rampdown
----------------------------------------------------------------------------
1001012018 irby PHYSICS_OPERATOR Oct 12 2000 3:36:07:593PM
. . . . . . . . . . . . . . . . . . . .
NL04 to 1.1e20 / m^2

Plasma into rampdown

Marfe at 0.18 s --- too much early gas?

Lost IGT gauge filament
----------------------------------------------------------------------------
1001012019 irby PHYSICS_OPERATOR Oct 12 2000 3:54:17:623PM
. . . . . . . . . . . . . . . . . . . .
NL04 to 1.2e20 / m^2 --- reduced early (<.2 s) density rise

TORVAC bit bypassed to allow shot

No gas enable!!!!!!!!!!
----------------------------------------------------------------------------
1001012020 irby PHYSICS_OPERATOR Oct 12 2000 4:24:21:653PM
. . . . . . . . . . . . . . . . . . . .
John Rice enters cell and brings IGT back online

Try again for plasma

Plasma into rampdown. Strange increase in density after 1 s.
----------------------------------------------------------------------------
1001012021 irby PHYSICS_OPERATOR Oct 12 2000 4:48:57:343PM
. . . . . . . . . . . . . . . . . . . .
NL04 request to 1.3e20 / m^2

Plasma into rampdown, density looks good
----------------------------------------------------------------------------
1001012022 irby PHYSICS_OPERATOR Oct 12 2000 5:08:13:436PM
. . . . . . . . . . . . . . . . . . . .
NL04 back to 1.1e20 / m^2

Plasma to rampdown --- that's it.

Session Leader Comments
Oct 12 2000 09:21:43:980AM1001012001Brian LabombardShot 1 - 0.8 MA, 5.2 tesla, NL04 around 1, no probes firing.

Next shot, adjust target position (ZXL, right gap) and fire probes.
Oct 12 2000 01:58:56:733PM1001012002Brian LabombardShot 2 - 0.8 MA, 5.2 tesla, NL04 around .85
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
No C2D4 injected on this shot.
ASP and FSP make it to LCFS

Next shot, repeat with C2D4 turned on.
Oct 12 2000 02:00:00:700PM1001012003Brian LabombardShot 3 - 0.8 MA, 5.2 tesla, NL04 around .85
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Plasma disrupts at .72 seconds, probably from ASP being over-inserted.


Next shot, repeat with ASP pulled back 2 mm.
Oct 12 2000 02:00:25:543PM1001012004Brian LabombardShot 4 - 0.8 MA, 5.2 tesla, NL04 around .8
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

ASP still over-inserted on first and third scans.

Next shot, repeat with ASP pulled back another 1 mm and FSP pushed in by 1 mm to look for ExB shear on plumes.
Oct 12 2000 02:00:51:577PM1001012005Brian LabombardShot 5 - 0.8 MA, 5.2 tesla, NL04 around .8
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on both probes for all three scans.

Next shot, go to NL04 = 0.7
Oct 12 2000 02:01:08:967PM1001012006Brian LabombardShot 6 - 0.8 MA, 5.2 tesla, NL04 around .75 and ramping
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Some arcing on ASP on the third scan.

Next shot, go to NL04 = 0.6
Oct 12 2000 02:01:36:750PM1001012007Brian LabombardShot 7 - 0.8 MA, 5.2 tesla, NL04 around .6
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04 = 0.5
Oct 12 2000 02:01:51:950PM1001012008Brian LabombardShot 8 - 0.8 MA, 5.2 tesla, NL04 around .51
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, repeat with FSP pulled out by 4 mm to 'base' of sharp density gradient to look for Er shear with plumes
Oct 12 2000 02:02:13:390PM1001012009Brian LabombardShot 9 - 0.8 MA, 5.2 tesla, NL04 around .51
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go back to NL04=0.6 with FSP still at 'base' of sharp density profile.
Oct 12 2000 02:02:36:123PM1001012010Brian LabombardShot 10 - 0.8 MA, 5.2 tesla, NL04 around .61
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Again, nice data on all scans.

Next shot, repeat with FSP at 'top' of steep density profile (5 mm deeper).
Oct 12 2000 02:03:02:827PM1001012011Brian LabombardShot 11 - 0.8 MA, 5.2 tesla, NL04 around .61
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04=0.7 with FSP at 'top' of steep density profile
Oct 12 2000 02:03:13:513PM1001012012Brian LabombardShot 12 - 0.8 MA, 5.2 tesla, NL04 around .75
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Goes into H-mode at 1.1 seconds!!
H-mode ends up toasting the ASP during the third scan and causing a disruption!

Next shot, repeat with FSP at 'bottom' of steep density profile also eliminating the last scans.
Oct 12 2000 01:54:48:437PM1001012013Brian LabombardShot 13 - 0.8 MA, 5.2 tesla, NL04 around .75
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5 seconds
C2D4 turned on.

Goes into H-mode at 1.03 seconds!!
Good data on two probe scans.

Next shot, go to NL04=0.8 with FSP at 'bottom' of steep density profile and bring back three probe scans.
Oct 12 2000 01:58:23:780PM1001012014Brian LabombardShot 14 - 0.8 MA, 5.2 tesla, NL04 around .75
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

First ASP scan a little toasty.
FSP data look good.

Next shot, repeat with FSP at 'top' of steep density profile
Oct 12 2000 02:28:35:047PM1001012015Brian LabombardShot 15 - 0.8 MA, 5.2 tesla, NL04 around .84
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04=0.9 with FSP at 'top' of steep density profile
Oct 12 2000 02:47:59:750PM1001012016Brian LabombardShot 16 - 0.8 MA, 5.2 tesla, NL04 around .91
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04=1.0 with FSP at 'top' of steep density profile
Oct 12 2000 03:11:19:250PM1001012017Brian LabombardShot 17 - 0.8 MA, 5.2 tesla, NL04 around 1.0
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04=1.1 with FSP at 'top' of steep density profile on first scan.
Oct 12 2000 03:45:29:717PM1001012018Brian LabombardShot 18 - 0.8 MA, 5.2 tesla, NL04 around 1.05 ramping to 1.1
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04=1.2 with FSP at 'top' of steep density profile on first scan.
Oct 12 2000 04:25:12:403PM1001012020Brian LabombardShot 20 - 0.8 MA, 5.2 tesla, NL04 around 1.1 ramping to 1.25
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go to NL04=1.3 with FSP at 'top' of steep density profile on first scan.
Oct 12 2000 04:52:25:747PM1001012021Brian LabombardShot 21 - 0.8 MA, 5.2 tesla, NL04 around 1.2 ramping to 1.38
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

Next shot, go back to NL04=1.1 with FSP at 'top' of steep density profile on first scan.
Oct 12 2000 05:17:40:873PM1001012022Brian LabombardShot 22 - 0.8 MA, 5.2 tesla, NL04 around 1.04 ramping to 1.12
ASP N,S in Vf mode, E,W in single sweep mode
FSP N,S in VF mode, E,W in swept double probe mode.
Probes firing at .7, 9.5, 1.2 seconds
C2D4 turned on.

Nice data on all scans.

- An excellent run!

Physics Operator Comments
Oct 12 2000 05:31:26:437PMJim IrbyEngineering Setup for Thursday, 12 October, Run 1001012

MP267---SOL Fluctuations (Ohmic)

SL: LaBombard
EO: Fitzgerald/Parkin
PO: Irby

Engineering setup:
-------------------

Overnight ECDC in D2, stopping 1-2 hours before run.

Run begins 9:00 and ends at 17:00

Power System Setup: Same as on 1001011020

Gas setup

fill B-top with 6 psi of D2 Hybrid enabled
fill B-side lower with 1 psi of Ar Hybrid DISABLED
fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC
fill C-side with 30 psi of D2 Hybrid enabled

Prepare for the possibility of probe injections of C2D4

The following gate valves should be enabled: The BEAST, ECE, VUV


Cold Start Done:

rtnode -- data loaded, A matrix responds
rtnode -- data loaded, M matrix responds
rtnode -- data loaded, PID matrix responds
RT_NODE Done
12-OCT-2000 07:27:32.76
Oct 12 2000 09:07:48:093AM1001012001Jim IrbyPlasma into rampdown, H/D 5%

Oct 12 2000 09:32:51:013AM1001012002Jim IrbyFixed ZXL at -.00626 at 0.8 s, and ramped it down to
-.08 by 1.48 s.

Ramped RCUR out by 1.5 mm from .5 to 1.0 s to try and keep
right gap constant for probe.

Plasma to rampdown



Oct 12 2000 09:54:44:170AM1001012003Jim IrbyIncreased RCUR by 1 mm. Last adjustment to extreme for
probe.


Plasma to 0.71 s, looks like A-port probe did us in
Oct 12 2000 10:11:02:747AM1001012004Jim IrbyRepeat shot 3 w/o probe induced disruption

Plasma to rampdown

Brian seems happy with plasma
Oct 12 2000 10:32:48:467AM1001012005Jim IrbyRepeat

Plasma into rampdown




Oct 12 2000 11:19:49:730AM1001012006Jim IrbyStarting Brian's density scan --- NL04 from 8e19 to 7e19 /m^2

Plasma to rampdown, density lower but ramping up a little, gas was off
by 1.0 s

H/D about 6%

Note that we have dithering on the h-alpha signal
Oct 12 2000 11:18:45:480AM1001012007Jim IrbyNL04 to 6e19 /m^2

Plasma to rampdown, density lower and flatter, H/D 5-6%
Oct 12 2000 11:53:44:500AM1001012008Jim IrbyNL04 to 5e19 /m^2

BP 2.2e-6 Torr at init


Plasma to rampdown, lower NL
Oct 12 2000 12:02:54:903PM1001012009Jim IrbyRepeat --- Brian liked last shot

Plasma to rampdown
Oct 12 2000 12:30:53:780PM1001012010Jim IrbyNL04 back to 6e19 /m^2

Plasma to rampdown, H/D 5-6%

Oct 12 2000 12:45:28:890PM1001012011Jim IrbyRepeat

Plasma to rampdown
Oct 12 2000 01:12:50:060PM1001012012Jim IrbyNL04 to 7e19 / m^2

Lost plasma at 1.2 s or so... blame the probe

We went into H-Mode making ASP very unhappy
Oct 12 2000 01:39:42:140PM1001012013Jim IrbyRepeat

Plasma to rampdown

Nice H-mode at 1 s


Oct 12 2000 01:57:34:780PM1001012014Jim IrbyNL04 up to 8e19 / m^3

Plasma into rampdown, no H-mode
Oct 12 2000 02:21:26:717PM1001012015Jim IrbyRepeat

Plasma to rampdown
Oct 12 2000 02:48:43:843PM1001012016Jim IrbyNL04 to 9e19 / m^2

plasma to rampdown
Oct 12 2000 03:11:25:780PM1001012017Jim IrbyNL04 to 1.0e20 / m^2

Plasma into rampdown
Oct 12 2000 03:36:07:593PM1001012018Jim IrbyNL04 to 1.1e20 / m^2

Plasma into rampdown

Marfe at 0.18 s --- too much early gas?

Lost IGT gauge filament
Oct 12 2000 03:54:17:623PM1001012019Jim IrbyNL04 to 1.2e20 / m^2 --- reduced early (<.2 s) density rise

TORVAC bit bypassed to allow shot

No gas enable!!!!!!!!!!

Oct 12 2000 04:24:21:653PM1001012020Jim IrbyJohn Rice enters cell and brings IGT back online

Try again for plasma

Plasma into rampdown. Strange increase in density after 1 s.


Oct 12 2000 04:48:57:343PM1001012021Jim IrbyNL04 request to 1.3e20 / m^2

Plasma into rampdown, density looks good
Oct 12 2000 05:08:13:437PM1001012022Jim IrbyNL04 back to 1.1e20 / m^2

Plasma to rampdown --- that's it.

Engineering Operator Comments
ShotTimeTypeStatusComment
108:57:54:030AMPlasmaOk
209:23:52:140AMPlasmaOk
309:45:55:153AMPlasmaOk
410:00:46:670AMPlasmaOk
510:22:48:810AMPlasmaOk
610:46:37:797AMPlasmaOk
711:07:29:030AMPlasmaOk
811:30:04:280AMPlasmaOk
911:51:21:450AMPlasmaOk
1012:15:00:263PMPlasmaOk
1112:37:40:547PMPlasmaOk
1201:03:22:293PMPlasmaOk
1301:25:19:077PMPlasmaOk
1401:49:28:873PMPlasmaOk
1502:12:48:200PMPlasmaOk
1602:38:11:123PMPlasmaOk
1703:01:20:687PMPlasmaOk
1803:25:20:437PMPlasmaOk
1903:51:54:060PMPlasmaOk
2004:14:16:827PMPlasmaOk
2104:40:20:750PMPlasmaOk
2205:04:44:560PMPlasmaOk