Alcator C-Mod Run 1070710 Information

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Miniproposals
Miniproposal:493
Date Filed: 6/18/2007
Title:Ohmic L-H Threshold Experiments
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 Cochran,Bill Parkin,Gary Dekow

Engineering Operator Run Comment
MP#493 Ohmic L-H Threshold Experiments

Session Leader Plans
Entered: Jul 9 2007 01:31:12:167PM
Author: Brian Labombard
MP#493 ""Ohmic L-H Threshold Experiments""

Goal
Investigate in detail the plasma conditions near the last-closed flux surface
(pressure gradients, collisionality, plasma flows, ...) that are associated
with ohmic L-H transitions.

Approach
We will ""dial-up"" some ohmic H-modes by the usual method of ramping the
toroidal field down and then back up slightly after L-H transition. We will look
at edge plasma flows and gradients just before and after transition with all available
edge diagnositcs. In particular, we will be taking the time to optimize scanning probe
insertion depths and times.

Plan
Load from shot#1070627008. Program a TF ramp-down, starting at 5.4 tesla at
0.3s, ramping down to 3.2 tesla by 1.0s and then back up to 3.5 tesla - this TF
ramp would be the same as on shot #1000915019, but delayed by 0.2 seconds.
Program NL04 ~ 0.65 x10^20 m^-2. Optimize ohmic H-mode (start time, transition from
ELM-free to EDA) by adjusting TF ramp and starting density.

A. 0.8 MA, LSN - 8 shots
i. Optimize scanning probe plunge depths and scan times to record conditions just
before (1 scan) and during H-mode (2 scans).
ii. Scan probes to record conditions well before the L-H transition, while q95 is
ramping down.

B. 0.8 MA, USN - 2 shots
Reload from shot #1070627018. Program same plasma current, TF ramp and target
density as in ""A"".
i. Optimize scanning probe plunge depths and scan times to record conditions as q95
is ramping down (0.5, 0.75, 1.0 s) - make sure that the probes scan deep enough to
resolve shear layer.

C. 0.6 MA, LSN - 8 shots
Go back to LSN discharge. Reprogram for 0.6 MA. Start the TF ramp-down
earlier at 0.1s, ramping down to 2.4 tesla by 1.0s and then back up to 2.7 tesla.
Program NL04 ~ 0.6 x10^20 m^-2. Optimize ohmic H-mode (start time, transition from
ELM-free to EDA) by adjusting TF ramp and starting density.
i. Optimize scanning probe plunge depths and scan times to record conditions just
before (1 scan) and during H-mode (2 scans).
ii. Optimize scanning probe plunge depths and scan times to record conditions well
before the L-H transition, while q95 is ramping down.

D. 0.8 MA, USN - 2 shots
Reload a shot from ""B"" above. Program same plasma current, TF ramp and target
density as in ""C"".
i. Optimize scanning probe plunge depths and scan times to record conditions as q95
is ramping down (0.5, 0.75, 1.0 s) - make sure that the probes scan deep enough to
resolve shear layer.

E. 1.2 MA, LSN - 6 shots
Back to LSN discharge, but with plasma current of 1.2 MA and toroidal field
of 6 tesla. Program TF ramp-down from 6 tesla at 0.5s, to 4.8 tesla by 0.9s and then
back up to 5.4 tesla. Program NL04 ~ 0.7 x10^20 m^-2. Optimize ohmic H-mode (start
time, transition from ELM-free to EDA) by adjusting TF ramp and starting density.
i. Optimize scanning probe plunge depths and scan times to record conditions just
before (1 scan) and during H-mode (2 scans).

F. 1.2 MA, USN - 2 shots
Reload a shot from ""D"" above. Program same plasma current, TF ramp and target
density as in ""E"".

Physics Operators Plans
Entered: Jul 10 2007 07:36:31:967AM
Author: Jim Irby
Physop plan for Friday, July 10, 2007

MP#493 Ohmic L-H Threshold Experiments

Session leaders: B. Labombard
Physics operator: J. Irby

Engineering Setup as for 1070627008

Alternator and Machine cooldown for a 9:00AM Start
Lockup no earlier than 8:30 AM. Run will end at 5:00PM.

Boronize overnight using 90%He/10%B2D6
Foreline pressure 35 mtorr
ECDC resonance scan from 75 to 85 cm, dwell at 80 cm (20 second dwell, 120 second scan) with vertical field (EF4 at 200 A)

Boronize for a total of 5 hours.

Also request 2 hours of ECDC in helium after boronization before the run:
rmin/rdwell/rmax 44/45/103 cm
tdwell/period 20/60 s
helium pressure 5e-5 Torr

Power Systems as on 1070627008

Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid enabled

Gas setup:
----------
Fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
NINJA backfill with 10 PSI of D2.

Enable the following gate valves and shutters: ECE, VUV, Z-bolo shutters
Enable DNB gatevalve when requested by DNB operator.

ICRF: not required
LH: not required

Physop plan:
------------

Setup for first plasma:

Load from shot#1070627008. Program a TF ramp-down, starting at 5.4 tesla at
0.3s, ramping down to 3.2 tesla by 1.0s and then back up to 3.5 tesla - this TF
ramp would be the same as on shot #1000915019, but delayed by 0.2 seconds.
Program NL04 ~ 0.65 x1020 m-2. Then optimize ohmic H-mode (start time,
transition from ELM-free to EDA) by adjusting TF ramp and starting density.

See session leader plan for remaining shots.

Session Leader Summaries
Entered: Jul 10 2007 10:10:46:177PM
Author: Brian Labombard
Run Summary for 1070710

MP#493 ""Ohmic L-H Threshold Experiments""

This was a painful run. There were numerous delays - cell entry, cooling requirements and a long
break to diagnose an apparent problem with the TF power supplies. By noon time we had taken only 5 shots,
4 with plasma. Ohmic H-mode did show up on shot#3, but very late, completely ignoring our programmed TF
rampdown phase. Then we had trouble (at first) programming a rampdown to a lower field, costing a
few shots. Finally, for no know reason, the H-modes did start showing up at the desired time (~1 s on shot#8, 1pm).
For added annoyance, the spectroscopy tree files began disappearing on some shots. Josh fixed this from
time-to-time with further delays. On shot #11 we finally got the desired probe scans with one in
H-mode. On shot #13 we attempted some deep probe scans (ASP, FSP, WASP all firing) into the H-mode phase.
This was a mistake. One or more of the probes caused a disruption, sending the plasma into the WASP probe
and toasting it. Post-mortem analysis revealed that we shorted two 'east' probes together and two 'west'
probes together. We then switched to running the A-port WASP but found out that we had also killed the
probe bias power supplies. Then the news got even worse. We found that the ASP got completed wasted (all
electrodes shorted together) by the disruption as well. The ASP probably caused the disruption.
So there we were, left with only one operating scanning probe, FSP, which was actually working pretty
well, hitting with a good H-mode scan - until shot#17 when the plasma also took careful aim at the
FSP with an early disruption. This disruption occured just as the probe was nearing its full insertion
(I don't think the probe caused that one). The result is that the south-east and south-west probes
are shorted together. (We cannot replace this probe.) With our spirits and probes completely broken, we limped
along for the last few shots, giving Bruce and Kenny an opportunity to pick over the carrion, scan the
gaps and puff NINJA at the H-modes.

Looking at the scattered bones, I think we only managed to complete section ""A"" of MP#493. Hopefully
we can patch up our probes and get another run day to try sections ""B"" though ""F"". Meanwhile, don't
look for me over the next few days. You will only find me hunkered down in the clean room with my
diamond file trying to build a replacement A-port scanning probe head or two - if I'm not in the Edge
Lab with Noah fixing the dead power supplies...
___________________________________________________________________________________
Quick shot log
1- data system test
2-LSN, Ip=0.8, Bt=5.4-3.3, no H-modes, NL04=0.62, SP @ 0.7, 0.9, 1.1s -in silos, ASP(+0), FSP(-15)
3-LSN, Ip=0.8, Bt=5.4-3.2, L-H @ 1.38, NL04=0.62, SP @ 0.7, 0.9, 1.1s, ASP(+8), FSP(-3)
4-LSN, Ip=0.8, Bt=5.4-3.2, L-H @ 1.33, NL04=0.66, SP @ 0.7, 0.9, 1.1s, ASP(+11)-cleaning up, FSP(-1)-good
5-LSN, Ip=0.8, Bt=5.4-3.2, L-H @ 1.34, NL04=0.67, SP @ 0.6, 0.8, 1.0s, ASP(+11), FSP(-1)
6-LSN, Ip=0.8, Bt=5.4-3.2, no H-modes, NL04=0.68, SP @ 0.6, 0.8, 1.0s, ASP(+12), FSP(-1)
7-LSN, Ip=0.8, Bt=5.4-2.8, no H-modes, NL04=0.72, SP @ 0.6, 0.8, 1.1s, ASP(+12), FSP(-1)
8-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.09, NL04=0.70, no SP
9-fizzle
10-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.25, NL04=0.72, SP @ 0.6, 1.0, 1.2s, ASP(+13), FSP(-1)
11-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.08, NL04=0.72, SP @ 0.6, 1.0, 1.2s, ASP(+13), FSP(-1)
12-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.0, NL04=0.78, SP @ 0.6, 1.0, 1.2s, ASP(+14), FSP(0)
13-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.1, NL04=0.72, SP @ 1.2s - disrupts plasma, ASP(+16), FSP(+3)
14-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.06, NL04=0.68, SP @ 0.6, 1.0, 1.2s, ASP(+14), FSP(0)
FSP is ok. WASP got toasted. ASP looks different - probably damaged.
15-LSN, Ip=0.8, Bt=5.4-2.8, L-H @1.04, NL04=0.68, SP @ 0.6, 1.0, 1.2s, ASP(+12), FSP(0)
WASP-A is not getting voltage waveforms. Looks like power supplies are damaged.
Looks like ASP is shorted.
Excellent targeting on FSP.
16-LSN, Ip=0.8, Bt=5.4-2.8, L-H @1.06, NL04=0.68, SP @ 0.6, 1.0, 1.2s, ASP(+12), FSP(0)
ASP NE, SE floating yet they have the voltage waveforms of the SW and NW probes.
WASP and ASP are off-line. FSP only now.
17-LSN, Ip=0.8, Bt=5.4-2.8, NL04=0.72, SP @ 0.6, 0.9, 1.1s, FSP(0)
Disrupted right at first probe scan.
18-fizzle
19-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.05, NL04=0.69, SP @ 0.6, 0.9, 1.1s, FSP(-3) - good FSP data
20-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.05, NL04=0.67, SP @ 0.6, 0.9, 1.1s, FSP(-2) - good FSP data
Looks like SE and SW electrodes are shorted together.

Physics Operator Summaries
Entered: Jul 10 2007 05:26:39:790PM
Author: Jim Irby
We began by loading shot 1070624008 which was a shot that had been nicely tuned up for the scanning probes. We ramped the TF down to generate the ohmic h-mode and then back up to sustain it. It took several shots to get the TF ramped down to the proper value and some time was spent investigating a problem with the TF control system that was not actually a problem. So we didn't really get good h-modes until shot 8. It is not clear why earlier shots did not go into h-mode as early as on shot 8. Shot 7 and shot 8 were from the DCPS point-of-view identical. Shot 8 did have less radiation before the h-mode. From shot 8 onward we had no problem generating useful h-modes.


problems:

faux tf issue

data system problems --- spectroscopy tree lost on 3 or 4 shots

cooling problem --- we need to cool machine down more aggressively starting on Monday.

score:

tests 01
fizzles 09,18
plasmas 02,03,04,05,06,07,08,10,11,12
13,14,15,16,17,19,20

pellet induced disruptions 04,05
probe induced disruption 13,15,17
clearin/rcur adjustment may have caused disruptions 19,20

Session Leader Comments
Jul 10 2007 09:33:34:993AM1070710002Brian Labombard2-LSN, Ip=0.8, Bt=5.4-3.3, no H-modes, NL04=0.62, SP @ 0.7, 0.9, 1.1s -in silos, ASP(+0), FSP(-15)

Next: repeat with faster and deeper TF rampdown.
Jul 10 2007 09:48:55:193AM1070710003Brian Labombard3-LSN, Ip=0.8, Bt=5.4-3.2, L-H @ 1.38, NL04=0.62, SP @ 0.7, 0.9, 1.1s, ASP(+8), FSP(-3)

Next: Ramp TF to lower values; try to get L-H sooner.
Jul 10 2007 10:45:44:503AM1070710004Brian Labombard4-LSN, Ip=0.8, Bt=5.4-3.2, L-H @ 1.33, NL04=0.66, SP @ 0.7, 0.9, 1.1s, ASP(+11)-cleaning up, FSP(-1)-good
Jul 10 2007 12:00:15:460PM1070710005Brian Labombard5-LSN, Ip=0.8, Bt=5.4-3.2, L-H @ 1.34, NL04=0.67, SP @ 0.6, 0.8, 1.0s, ASP(+11), FSP(-1)
Jul 10 2007 12:29:45:233PM1070710006Brian Labombard6-LSN, Ip=0.8, Bt=5.4-3.2, no H-modes, NL04=0.68, SP @ 0.6, 0.8, 1.0s, ASP(+12), FSP(-1)

next: dip TF more
Jul 10 2007 12:41:05:633PM1070710007Brian Labombard7-LSN, Ip=0.8, Bt=5.4-2.8, no H-modes, NL04=0.72, SP @ 0.6, 0.8, 1.1s, ASP(+12), FSP(-1)


Next: reload 1070628022
Jul 10 2007 01:14:16:330PM1070710008Brian Labombard8-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.09, NL04=0.70, no SP

This was supposed to be a reload of shot#1070628022 but instead ended up being a repeat of shot#7.

Next: repeat with probes scanning.
Jul 10 2007 02:07:59:137PM1070710010Brian Labombard10-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.25, NL04=0.72, SP @ 0.6, 1.0, 1.2s, ASP(+13), FSP(-1)
Jul 10 2007 02:09:23:060PM1070710011Brian Labombard11-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.08, NL04=0.72, SP @ 0.6, 1.0, 1.2s, ASP(+13), FSP(-1)
Last scan in H-mode (first H-mode data this campaign)

Next: repeat with jog in outer gap
Jul 10 2007 02:44:22:587PM1070710012Brian Labombard12-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.0, NL04=0.78, SP @ 0.6, 1.0, 1.2s, ASP(+14), FSP(0)

next: repeat with probes deep at 1.2s
Jul 10 2007 03:50:41:683PM1070710014Brian Labombard14-LSN, Ip=0.8, Bt=5.4-2.8, L-H @1.06 , NL04=0.68, SP @ 0.6, 1.0, 1.2s, ASP(+14), FSP(0)
FSP is ok. WASP got toasted. ASP looks different - probably damaged.

Next: Change to A-port wasp. Repeat.
Jul 10 2007 04:06:35:960PM1070710015Brian Labombard15-LSN, Ip=0.8, Bt=5.4-2.8, L-H @1.04, NL04=0.68, SP @ 0.6, 1.0, 1.2s, ASP(+12), FSP(0)
WASP-A is not getting voltage waveforms. Looks like power supplies are damaged.
Looks like all electrodes on ASP are shorted.

Repeat
Jul 10 2007 04:21:30:333PM1070710016Brian Labombard16-LSN, Ip=0.8, Bt=5.4-2.8, L-H @1.06, NL04=0.68, SP @ 0.6, 1.0, 1.2s, ASP(+12), FSP(0)
ASP NE, SE floating yet they have the voltage waveforms of the SW and NW probes.
WASP and ASP are now off-line. Only FSP remaining.
Jul 10 2007 04:45:58:820PM1070710017Brian Labombard17-LSN, Ip=0.8, Bt=5.4-2.8, NL04=0.68, SP @ 0.6, 0.9, 1.1s, FSP(0)
Disrupted right at first probe scan. FSP NE probe may be damaged.
Jul 10 2007 05:02:11:397PM1070710019Brian Labombard19-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.05, NL04=0.69, SP @ 0.6, 0.9, 1.1s, FSP(-3)
FSP is still ok. Good FSP data.
Jul 10 2007 05:15:33:517PM1070710020Brian Labombard20-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.05, NL04=0.67, SP @ 0.6, 0.9, 1.1s, FSP(-2) - good FSP data
Looks like FSP SE and SW electrodes are shorted together.

Physics Operator Comments
Jul 9 2007 02:14:26:260PMJim IrbyLoaded shot 1070627008 into DPCS --- LSN startup shot
Jul 10 2007 09:04:18:720AMJim Irbyprogrammed ramp for first shot:

copied seg 2 from 1000915019 into seg 4
copied seg 4 TF ramp into seg 2 TF ramp
delayed TF ramps in seg 2 by 0.2 s
copied seg 4 from 1070627008 into seg 4

prepuff to 16 ms from 18 ms

nl_04 request to 0.65e20/m^2

loaded into DPCS


Jul 10 2007 09:10:54:430AM1070710001Jim Irbytest shot for data system, bus Rogowskis, gas puff, etc

Rogowskis ok
gas puff ok
h-alpha detector still bit level noise

Jul 10 2007 09:33:55:667AM1070710002Jim Irbydelay for 5 minutes to cool H-Right Top

plasma into rampdown --- no h-modes

Bt did not reach 3.2 T


Jul 10 2007 09:50:27:397AM1070710003Jim Irbydropped Bt faster and a little lower

prepuff from 16 to 17 ms

plasma into rampdown --- h-mode late

Bt still too high?
Jul 10 2007 10:46:01:613AM1070710004Jim IrbyLong pause as we recovered cooling following cell entry.

Dropped Bt again (70 kA min)

plasma into rampdown --- field too high!

may be a problem with the TF supply: cabinet 3 & 4 following demand well, but 1 and 2 follow with a lag time. May explain why we have had difficulty reaching the 3.2 T level.




Jul 10 2007 11:53:49:300AM1070710005Jim IrbyLong break to diagnose TF issue and add instrumentation on cosine board inputs

Dropped Bt again also ramping down faster:
ramp from 0.3 s to 0.5 s from 0.3 s to 0.6 s
Minimum in current now 70 kA

plasma --- pellet induced disruption
Jul 10 2007 12:12:20:800PM1070710006Jim Irbytried to modify triangularity and elongation to be closer to programming from shot 1000915019. Inner gap is much smaller today than on the earlier shot too, but that's needed for the probes.

plasma into rampdown --- no h-modes



Jul 10 2007 12:37:43:833PM1070710007Jim IrbyExtended flat-top following ramp another 100 ms and keep current request at about 65 kA.

plasma into rampdown --- lower field, but no h-modes


Jul 10 2007 12:52:05:330PM1070710008Jim Irbyloaded shot 1070628022 to see if we can get h-modes again

plasma into rampdown with h-modes starting at 1.08 s

***** BUT I FORGOT TO LOAD THE SHOT ****
***** H-MODES BECAUSE?? ****************


Jul 10 2007 01:27:45:747PM1070710009Jim Irbyno DPCS changes

fizzle

nothing wrong with fields; or gas; looks like we bumped something..

**** lost tree files for shot 9 ***********
**** Josh is checking it out **************
Jul 10 2007 01:39:06:020PM1070710010Jim Irbylong delay to check on data system: spectroscopy tree files disappeared. Josh restored.

prepuff from 17 to 18 ms

plasma into rampdown

Jul 10 2007 02:07:34:760PM1070710011Jim Irbyrxl from 0 to .01 m from 1 to 1.5 s
zxl ramping one more cm negative from 1 to 1.5 s

plasma into rampdown --- earliest h-mode yet -- NINJA was turned off


Jul 10 2007 02:17:14:113PM1070710012Jim IrbyMoved rcur out 0.0015 m after 1 s.

IGT at 1.1e-6 at CHECK

plasma into rampdown --- h-modes a little earlier

plenty of fluctuations


Jul 10 2007 02:36:55:020PM1070710013Jim Irbyno DPCS changes

disruption at 1.2 s : too many probes too deep


Jul 10 2007 03:31:13:513PM1070710014Jim IrbyLong wait to get highway 5 back on-line

plasma into rampdown --- nice h-modes --- probe got in



Jul 10 2007 03:58:57:520PM1070710015Jim IrbyCell entry to switch inner wall probes (toasted for untoasted)
Took approx 15 minutes to clear out GN2
About 35 minutes to init

DPCS repeat

disruption at 1.54 s



Jul 10 2007 04:13:52:797PM1070710016Jim Irbyrepeat

plasma into rampdown
Jul 10 2007 04:29:21:387PM1070710017Jim Irbyrcur between 1.4 and 1.5 s ramped inward 6 mm
clearin between 1.4 and 1.5 s ramped inward 6 mm

disruption at 0.6 s --- probe


Jul 10 2007 04:40:29:113PM1070710018Jim Irbyrepeat

fizzle --- should have dropped gas a little (probably)


Jul 10 2007 05:01:36:647PM1070710019Jim Irbyno changes

IGT 9.5e-7 Torr at CHECK

disruption at 1.46 s

spectroscopy tree gone again --- Josh notified


Jul 10 2007 05:07:15:837PM1070710020Jim Irbyprepuff from 18 to 17 ms

plasma into rampdown

disruption at 1.47 s --- ramp in rcur and clearin probable cause




Engineering Operator Comments
ShotTimeTypeStatusComment
109:00:56:890AMTestOkShot cycle test
209:21:35:720AMPlasmaOk
309:40:03:547AMPlasmaOk
410:21:45:313AMPlasmaOk
511:31:33:110AMPlasmaOk
611:54:29:753AMPlasmaOk
712:21:24:010PMPlasmaOk
812:39:31:430PMPlasmaOk
901:03:07:930PMPlasmaOk
1001:27:38:120PMPlasmaOk
1101:42:23:850PMPlasmaOk
1202:08:37:903PMPlasmaOk
1302:26:31:400PMPlasmaOk
1403:14:04:407PMPlasmaOk
1503:48:28:793PMPlasmaOk
1604:08:01:683PMPlasmaOk
1704:22:40:177PMPlasmaOk
1804:35:26:280PMPlasmaOk
1904:48:30:933PMPlasmaOk
2005:01:41:660PMPlasmaOk
2205:22:36:350PMTestOk

System Availability
Jul 10 2007 09:00:28:280AM
SystemAvailableCommentAvailability
Changed
OwnerDescriptionWho Can
Change
Active MHDyesFully operationalMar 28 2007 09:19PM (sears)Joe SnipesActive MHD Antennasears,snipes
BESyesvertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm.Feb 06 2007 10:00AM (bravenec)Ron BravenecBeam Emission Spectroscopybravenec
Bolometersyes2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated for senstivity, still need better time constants. Midplane and divertor AXUV being digitized, processing calibration data.May 29 2007 11:22AM (mlreinke)Matt ReinkeBolometershutch,mlreinke
BoronizationyesFirst Boronization 5/9/07May 10 2007 04:55PM (irby)Jim IrbyBoronizationdekow,irby
CNPAno Jan 14 2007 02:06PM Ron ParkerCompact Neutral Analyzerparker
Cryopump - Upper DivertoryesThe cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation.May 30 2007 07:58PM (labombard)Brian LaBombardUpper Divertor Cryopumpirby,labombard
CXRSyesThe pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm.Jun 20 2007 05:35PM (bespam)Bill RowanCharge Exchange Spectroscopybespam,blip,rachmcd,rowan
D Alphayes\ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are availableMar 11 2007 10:28PM (terry)Jim TerryBalmer Alpha Monitorirby,terry,wolfe
Dalsayescamera is re-installed, and view has been calibratedFeb 26 2007 03:28PM (marmar)Earl MarmarVisible Bremsstrahlungmarmar
Disruption Mitigationno Jan 14 2007 02:02PM Bob GranetzGas Jetgranetz,whyte
Divertor IRno Mar 06 2007 10:50AM Glen WurdenDivertor IR Digital Videogwurden,terry
Divertor IR Spectroscopyno Mar 06 2007 10:51AM Glen WurdenDivertor IR Spectroscopygwurden,ldorf,terry
DNByesAll systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shotsMar 28 2007 09:36AM (beals)Bob GranetzDiagnostic Beambeals,granetz
FRC-ECEnoOnly high frequency channels now working (17 to 32). LO is OK. Problem looks to be in mixer amp unit.Jun 29 2007 05:42PM (phillips)Perry PhillipsHeterodyne ECE-32 channelsphillips
G-Side RatiomaticyesThe gauge is operational.Mar 30 2007 10:54AM (labombard)Brian LaBombardG-side ratiomatic ionization gaugelabombard,toland
GPCyesChs 1-8 operational. May 24 2007 08:40AM (hubbard)Amanda HubbardECE Polychromaterhubbard,schmidt
GPC2yesMost channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard)Amanda HubbardECE Polychromaterhubbard,schmidt
GPIyesNew view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational.Mar 27 2007 01:59PM (terry)Jim TerryGas Puff Imagingterry,zweben
H/Dyesspectral calibration needs to be checked, but system should be ready for the runFeb 26 2007 03:28PM (marmar)Earl MarmarH/D Ratiomarmar
Hirex Jryes Mar 06 2007 08:59AM (rice)John RiceHigh Resolution X-Rayince,rice
Hirex SryesStoring Data, but profiles not yet availableApr 27 2007 01:20PM (ince)John RiceHigh Resolution X-Rayince,rice
HXRyesSomething might be wrong with channel 26; all others working fine.Mar 23 2007 10:43AM (schmidt)Ron ParkerHard X-Ray Arrayparker,schmidt
ICRF D-Antennayes80.5 MHz. Max power is about 1.5 MWJun 20 2007 09:23AM (ylin)Steve WukitchD-port antennawukitch,ylin
ICRF E-Antennayes80 MHz. Maxc power is about 1.5 MWJun 20 2007 09:23AM (ylin)Steve WukitchE-port antennawukitch,ylin
ICRF J-Antennayes78 MHz. dipole configuration. Using #4 transmitter only. Max power about 1.5 MW instead of 3 MW.Jun 20 2007 09:22AM (ylin)Steve WukitchJ-port antennawukitch,ylin
Lower Hybridno6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry)Ron ParkerLower Hybriddterry,parker
LPIyes Apr 26 2007 08:35PM (bose)Earl MarmarLithium Pellet Injectorbose,marmar
Ly-alphayesMidplane data being digitized, processing calibration data. Divertor views showing significant noise, and not available. Upper view being debugged.May 29 2007 11:23AM (mlreinke)Matt ReinkeLyman alpha cameraslabombard,mlreinke
McPhersonyesWorking normally.Apr 19 2007 09:52AM (mlreinke)Jim TerryVUV Spectrometermlreinke,terry
MichelsonyesOperational. Mar 28 2007 08:33AM (hubbard)Amanda HubbardECE Te Profileshubbard,schmidt
MKSyesE-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box.Mar 20 2007 06:42PM (g)Brian LaBombardBaratron pressure gaugeslabombard
MLPnoInitial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard)Brian LaBombardMirror Langmuir Probe Electronics Systemlabombard
MSEno(1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott)Steve ScottMotional Stark Effectjinseok,sscott
NeutronsyesBoth neutron systems are fully operationalApr 05 2007 11:19AM (fiore)Catherine FioreNeutron Detectorsfiore
Neuts and HardsyesoperationalMar 21 2007 04:29PM (irby)Jim IrbyX-Ray/Neutron Detector at K-Horirby
NINJAyesAll capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter).Mar 29 2007 11:47AM (terry)Brian LaBombardNINJA gas pufflabombard,terry
PCIyesThe system is to be optimized.May 30 2007 01:12PM (lianglin)Miklos PorkolabPhase Contrast Imagingedlund,lianglin,ntsujii,porkolab
Penning Gaugesyes8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'.Mar 13 2007 10:01PM (labombard)Brian LaBombardPenning Ionization Gaugeslabombard
Plasma TVyesWIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational.Mar 27 2007 01:53PM (terry)Jim TerryVideo of plasma via several camerasdekow,irby,terry,wolfe
PolarimeternoRetro shutter closedMar 15 2007 11:00AM (irby)Jim IrbyC-Mod Polarimeterirby
Probe Array - ISDyesProbes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms.Mar 13 2007 09:47PM (labombard)Brian LabombardInner Lower Divertor Probe Arraylabombard
Probe Array - LHyesAll 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard)Brian LaBombardLower Hybrid Probe Arraylabombard
Probe Array - OSDyesProbes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard)Brian LaBombardOuter Lower Divertor Probe Arraylabombard
Probe Array - UDIVyes14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis.Mar 13 2007 12:46PM (labombard)Brian LaBombardUpper Divertor Probe Arraylabombard
ReflectometeryesTemporarily out of serviceJul 10 2007 07:05AM (dominguez)Earl MarmarReflectometerdominguez,marmar
Scanning Probe - ASPyesPerpendicular Mach probe head is installed. The drive is operational.Mar 15 2007 09:09PM (labombard)Brian LaBombardA-Port Scanning Probelabombard
Scanning Probe - FSPyesPerpendicular Mach probe head is installed. The probe drive is now operational.Mar 13 2007 09:51PM (labombard)Brian LaBombardF-Port Scanning Probelabombard
Scanning Probe - WASPyesA-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed.Apr 12 2007 04:18PM (nsmick)Brian LaBombardInner Wall Scanning Probelabombard,nsmick
TCIyesNL_04 at 71.04 cm from 3/9/07 calibrationMay 23 2007 07:38AM (irby)Jim IrbyTwo-Color Interferometerirby,murray
TS - Coreyes2 lasers, 11 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Additional spatial channels will be added over the next several weeks.May 10 2007 10:37AM (jwhughes)Jerry HughesCore Thomson scatteringjwhughes
TS - Edgeyes2 lasers, 20 spatial channels. Fiber holder position is -124.5mm (standard). Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015.Jun 14 2007 06:21PM (jwhughes)Jerry HughesMillimeter resolution edge Thomson scatteringjwhughes
Vispecyes350 and 670 nm, 4 spatial channelsMay 04 2007 01:02PM (agraf)Alex GrafVisible Spectrometeragraf


Jul 10 2007 02:08:19:683PM
SystemAvailableCommentAvailability
Changed
OwnerDescriptionWho Can
Change
Active MHDyesFully operationalMar 28 2007 09:19PM (sears)Joe SnipesActive MHD Antennasears,snipes
BESyesvertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm.Feb 06 2007 10:00AM (bravenec)Ron BravenecBeam Emission Spectroscopybravenec
Bolometersyes2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated for senstivity, still need better time constants. Midplane and divertor AXUV being digitized, processing calibration data.May 29 2007 11:22AM (mlreinke)Matt ReinkeBolometershutch,mlreinke
BoronizationyesFirst Boronization 5/9/07May 10 2007 04:55PM (irby)Jim IrbyBoronizationdekow,irby
CNPAno Jan 14 2007 02:06PM Ron ParkerCompact Neutral Analyzerparker
Cryopump - Upper DivertoryesThe cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation.May 30 2007 07:58PM (labombard)Brian LaBombardUpper Divertor Cryopumpirby,labombard
CXRSyesThe pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm.Jun 20 2007 05:35PM (bespam)Bill RowanCharge Exchange Spectroscopybespam,blip,rachmcd,rowan
D Alphayes\ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are availableMar 11 2007 10:28PM (terry)Jim TerryBalmer Alpha Monitorirby,terry,wolfe
Dalsayescamera is re-installed, and view has been calibratedFeb 26 2007 03:28PM (marmar)Earl MarmarVisible Bremsstrahlungmarmar
Disruption Mitigationno Jan 14 2007 02:02PM Bob GranetzGas Jetgranetz,whyte
Divertor IRno Mar 06 2007 10:50AM Glen WurdenDivertor IR Digital Videogwurden,terry
Divertor IR Spectroscopyno Mar 06 2007 10:51AM Glen WurdenDivertor IR Spectroscopygwurden,ldorf,terry
DNByesAll systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shotsMar 28 2007 09:36AM (beals)Bob GranetzDiagnostic Beambeals,granetz
FRC-ECEnoOnly high frequency channels now working (17 to 32). LO is OK. Problem looks to be in mixer amp unit.Jun 29 2007 05:42PM (phillips)Perry PhillipsHeterodyne ECE-32 channelsphillips
G-Side RatiomaticyesThe gauge is operational.Mar 30 2007 10:54AM (labombard)Brian LaBombardG-side ratiomatic ionization gaugelabombard,toland
GPCyesChs 1-8 operational. May 24 2007 08:40AM (hubbard)Amanda HubbardECE Polychromaterhubbard,schmidt
GPC2yesMost channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard)Amanda HubbardECE Polychromaterhubbard,schmidt
GPIyesNew view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational.Mar 27 2007 01:59PM (terry)Jim TerryGas Puff Imagingterry,zweben
H/Dyesspectral calibration needs to be checked, but system should be ready for the runFeb 26 2007 03:28PM (marmar)Earl MarmarH/D Ratiomarmar
Hirex Jryes Mar 06 2007 08:59AM (rice)John RiceHigh Resolution X-Rayince,rice
Hirex SryesStoring Data, but profiles not yet availableApr 27 2007 01:20PM (ince)John RiceHigh Resolution X-Rayince,rice
HXRyesSomething might be wrong with channel 26; all others working fine.Mar 23 2007 10:43AM (schmidt)Ron ParkerHard X-Ray Arrayparker,schmidt
ICRF D-Antennayes80.5 MHz. Max power is about 1.5 MWJun 20 2007 09:23AM (ylin)Steve WukitchD-port antennawukitch,ylin
ICRF E-Antennayes80 MHz. Maxc power is about 1.5 MWJun 20 2007 09:23AM (ylin)Steve WukitchE-port antennawukitch,ylin
ICRF J-Antennayes78 MHz. dipole configuration. Using #4 transmitter only. Max power about 1.5 MW instead of 3 MW.Jun 20 2007 09:22AM (ylin)Steve WukitchJ-port antennawukitch,ylin
Lower Hybridno6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry)Ron ParkerLower Hybriddterry,parker
LPIyes Apr 26 2007 08:35PM (bose)Earl MarmarLithium Pellet Injectorbose,marmar
Ly-alphayesMidplane data being digitized, processing calibration data. Divertor views showing significant noise, and not available. Upper view being debugged.May 29 2007 11:23AM (mlreinke)Matt ReinkeLyman alpha cameraslabombard,mlreinke
McPhersonyesWorking normally.Apr 19 2007 09:52AM (mlreinke)Jim TerryVUV Spectrometermlreinke,terry
MichelsonyesOperational. Mar 28 2007 08:33AM (hubbard)Amanda HubbardECE Te Profileshubbard,schmidt
MKSyesE-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box.Mar 20 2007 06:42PM (g)Brian LaBombardBaratron pressure gaugeslabombard
MLPnoInitial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard)Brian LaBombardMirror Langmuir Probe Electronics Systemlabombard
MSEno(1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott)Steve ScottMotional Stark Effectjinseok,sscott
NeutronsyesBoth neutron systems are fully operationalApr 05 2007 11:19AM (fiore)Catherine FioreNeutron Detectorsfiore
Neuts and HardsyesoperationalMar 21 2007 04:29PM (irby)Jim IrbyX-Ray/Neutron Detector at K-Horirby
NINJAyesAll capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter).Mar 29 2007 11:47AM (terry)Brian LaBombardNINJA gas pufflabombard,terry
PCIyesThe system is to be optimized.May 30 2007 01:12PM (lianglin)Miklos PorkolabPhase Contrast Imagingedlund,lianglin,ntsujii,porkolab
Penning Gaugesyes8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'.Mar 13 2007 10:01PM (labombard)Brian LaBombardPenning Ionization Gaugeslabombard
Plasma TVyesWIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational.Mar 27 2007 01:53PM (terry)Jim TerryVideo of plasma via several camerasdekow,irby,terry,wolfe
PolarimeternoRetro shutter closedMar 15 2007 11:00AM (irby)Jim IrbyC-Mod Polarimeterirby
Probe Array - ISDyesProbes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms.Mar 13 2007 09:47PM (labombard)Brian LabombardInner Lower Divertor Probe Arraylabombard
Probe Array - LHyesAll 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard)Brian LaBombardLower Hybrid Probe Arraylabombard
Probe Array - OSDyesProbes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard)Brian LaBombardOuter Lower Divertor Probe Arraylabombard
Probe Array - UDIVyes14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis.Mar 13 2007 12:46PM (labombard)Brian LaBombardUpper Divertor Probe Arraylabombard
ReflectometernoTemporarily out of serviceJul 10 2007 01:44PM (dominguez)Earl MarmarReflectometerdominguez,marmar
Scanning Probe - ASPyesPerpendicular Mach probe head is installed. The drive is operational.Mar 15 2007 09:09PM (labombard)Brian LaBombardA-Port Scanning Probelabombard
Scanning Probe - FSPyesPerpendicular Mach probe head is installed. The probe drive is now operational.Mar 13 2007 09:51PM (labombard)Brian LaBombardF-Port Scanning Probelabombard
Scanning Probe - WASPyesA-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed.Apr 12 2007 04:18PM (nsmick)Brian LaBombardInner Wall Scanning Probelabombard,nsmick
TCIyesNL_04 at 71.04 cm from 3/9/07 calibrationMay 23 2007 07:38AM (irby)Jim IrbyTwo-Color Interferometerirby,murray
TS - Coreyes2 lasers, 11 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Additional spatial channels will be added over the next several weeks.May 10 2007 10:37AM (jwhughes)Jerry HughesCore Thomson scatteringjwhughes
TS - Edgeyes2 lasers, 20 spatial channels. Fiber holder position is -124.5mm (standard). Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015.Jun 14 2007 06:21PM (jwhughes)Jerry HughesMillimeter resolution edge Thomson scatteringjwhughes
Vispecyes350 and 670 nm, 4 spatial channelsMay 04 2007 01:02PM (agraf)Alex GrafVisible Spectrometeragraf