Alcator C-Mod Run 1070831 Information

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Miniproposals
Miniproposal:491
Date Filed: 5/25/2007
Title:MSE Calibrations
First Author:Steve Scott
Session Leader:Steve Scott (shots 1-7)
Session Leader:Steve Scott (shots 31-33)
Miniproposal:501
Date Filed: 7/12/2007
Title:Fluctuations in ITB Plasmas
First Author:Catherine Fiore
Session Leader:Catherine Fiore (shots 8-30)

Operators
Session leader(s):Steve Scott,Catherine Fiore,Steve Scott
Physics operator(s):Steve Wolfe,Ron Parker,Robert Granetz,Ron Parker
Engineering operator(s):Bill Cochran,Ed Fitzgerald,Gary Dekow

Engineering Operator Run Comment
MP 501: Fluctuations in ITB Plasmas MP 491: MSE Calibrations Session Lea

Session Leader Plans
Entered: Aug 30 2007 04:20:46:600PM
Author: Catherine Fiore
The primary purpose of this experiment is to study the instabilities that are associated with ITB development and saturation in Alcator C-MOD. This is MP501, Fluctuations in ITB plasmas.

Overnight boronization is scheduled, followed by 2 hours ecdc in He, 1 hour in D2.

Set up as in shot 1040310010, TF 6.4T, Ip 1 MA, nl04 1 x 1019, D2. Attempt to get reproducible EDA H-modes with 2-3 MW ICRF, which will produce ITBs. Argon will be required for HIREX, but must be used sparingly and discontinued if ITBs don't form. PCI group needs 2-3 similar shots to answer the critical question on the instability propagation and location. It may take 10-20 shots to get 3 good ones.

Caution, at high field care must be taken to make sure the resonance does not intersect the antenna, because higher plasma current pushes the resonance further. There is a fine line between having the resonance far enough off axis to get the ITB and having it too far and touching the antenna.

All standard core diagnostics, Reflectometry, TS (Edge and Core), VB, ECE (GPC1 and GPC2), FRCECE, magnetics, MSE, PCI, TCI, Da, HIREX, CXRS are required. PCI is of prime importance.
Entered: Aug 31 2007 08:46:24:157AM
Author: Jin-Seok Ko


MP#491 MSE calibrations

Purpose: Shot-to-shot variability observation in the beam-into-gas calibration

Run plan:

At the beginning of the run, 6 shots
At the end of the run, 2 shots

1. The first five shots in the morning

(1) Gas: 1070529026 with some modification

D2, 0.5 mTorr in G-side MKS. This is 0.29 in G-side rat. Also note that it was He4
in 1070529026.

Also the gas pressure decreased in the middle of the shot so ~ 7% (0.29 x 0.07 =
0.02 in G-side rat) puffiing may be required at 0.5 sec.

(2) Power system: 1070529026 with some modification.

EF3 ramps to 10.0kA at 1.35 sec and remains at 10.0kA until 1.5 sec, then ramps down.
EF4 same as 1070529026.

(3) DNB: 0.1 ~ 1.5 sec long pulse

2. The last shot in the morning

(1) Gas: Same as 1

(2) Power system: 1070529008 with some modification.

TF and EF3 flattop extended by 100 msec.

(3) DNB: 0.2 ~ 1.7 sec long pulse

3. The 2 shots in the evening : Same as 1


Physics Operators Plans
Entered: Aug 30 2007 05:55:50:203PM
Author: Ron Parker
Engineering setup for Friday, 31 Aug 2007

MP 501: Fluctuations in ITB Plasmas
MP 491: MSE Calibrations

Session Leader: C. Fiore (MP 501)
J-S Ko (MP 491)
Physop: R. Parker
Run is scheduled to begin at 9:00 am and end at 5:00 pm (EDT)

Overnight boronization required before this run

-------------------------------------
Boronization Parameters
--------------------------------------
foreline(TC6) pressure request: 70 mTorr
sweep (rmin/rdwell/rmax): 60/75/80 cm
scan: 60/120 s ** NOTE - 50% dwell; this is unusual **
Run for 10 hours or change in bottle pressure of 120psi, whichever comes first EF4: 200 A

------------------------------
Post-boronization ECDC Parameters
------------------------------
Two hours in He
gas and pressure: He at 5e-5 Torr
sweep: 44/45/103 cm
scan: 20/120 s
Followed by One hour in D2
gas and pressure: D2 at 2e-4
sweep: 44/45/103
scan: 20/120 s

Engineering Setup:
------------------
Begin with 6 shots, beam into gas

Power systems as on:1070529026

Acoil: +Dtop -Dbot -Jtop +Jbot (standard) **Hybrid Disabled until MP 501 begins**

Acoil start time set to 0.2sec

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)
fill NINJA with 10 psi D2 DISABLED



Enable the following gate valves and shutters:DNB for MP 491

Enable the following gate valves and shutters: ECE, VUV, Z-bolo shutters, DNB
for MP 501

Torvac setup: Gate valves open during pulse.

ICRF: All operating ICRF ready for MP 501, ~shot 7

LHRF: No

Starting shot: 1070529026 for MP 491, then 1040310010 for MP 501

Session Leader Summaries
Entered: Aug 31 2007 04:57:01:233PM
Author: Catherine Fiore
The run was initially frustrating, but we finally obtained the data on ITB fluctuations that we needed. Shots 21-30 all had ITBs and will be useful for analysis. HIREX data was obtained after shot 25. We were unable to run low field side ITBs, because of repeated disruptions so we completed the run with high field side off axis ICRF. Once we got them, which required moving the strike point, they were reproducible.

Begin run at shot 8, which was a no power shot, as was shot 9.

Shot 10 was a good plasma, but there was not enough rf power and the H-mode did not last very long.

Shot 11 had a good EDA h-mode, but the power was still low and there was no ITB.

Shot 12 began a long series of disruptions with the rf power: Shots 12-15 disrupted just after the rf turned on, despite tweaking the resonance location.

Shot 16 was fine with no RF.

Shot 17 disrupted after the RF came on.

Shot 18 was at 5.4 T, RF resonance on center, and was fine.

Shot 19 was at 5.9 T and disrupted with the RF turn on.

Shot 20 was at 4.5T and disrupted with the RF turn on, indicating that is not the resonance location that is causing the problem.

ITBs with PCI masked to the upper half of the plasma:

Shot 21 was sucessful with ITB (the lower x-point was moved out.) The PCI window was set a little too early.

Shot 22 was successful with ITB and fluctuation data.

Shot 23, successful with ITB and good fluctuation data.


ITBs with PCI masked to the lower part of the plasma:

Shot 24 was successful with ITB

Shot 25 was successful with ITB

Shot 26 was successful with ITB

ITBs with PCI unmasked:

Shot 27 was successful with a weak ITB

Shot 28 was successful with a stronger ITB, possibly the best one of the day.

Shot 29 was similar to shot 28.

Shot 30 had a lower magnetic field and consequently higher rate of rise on the ITB with stronger peaking. There was a back transition which recovered to a 2nd stron ITB.

Entered: Aug 31 2007 07:32:32:130PM
Author: Jin-Seok Ko



MP#491 MSE calibration

Purpose: Shot-to-shot variability observation in the beam-into-gas calibration

This run is divided by two parts: 6 shots at the beginning of the run and
3 shots at the end. All are the beam-into-D2 gas.

1. Shots 2,3,4,5,6, and 31, 32

These shots have the same gas & power setting - 0.5 mTorr & EF3/EF4 ramp.
There are many plasmas (from the other run) between shots 6 and 31.
We see the shot-to-shot variation up to 2 degrees between the first 5 shot
group and the last 2 shot group. Each group's shot-to-shot variation is
less than 1 degree. Inner channels are a little better than outer channels.

2. Shots 7 and 33

These two shots have the same gas & power setting - 0.5 mTorr & constant
EF3/EF4 which gives constant pitch angle during the entire shot. Many
plasma shots in between. The variation is up to 1 degree. There is a
small reduction in Bt in shot 33 and this causes a pitch angle changes
by 0.1 degree, so the shot-to-shot variability is much larger than that.

3. Also, there is some sort of 'roll over' in the pitch angle in time
when the beam pulse starts. To test this, between shots 31 and 32 we moved
the beam starting time from 0.05 sec to 0.4 sec. In both shots, the
roll-over effect is observed.


Physics Operator Summaries
Entered: Aug 31 2007 04:50:45:223PM
Author: Ron Parker
The run was divided into two parts, one on MP 491, Beam into gas shots for MSE calibration, the other on MP 501, fluctuations in ITB discharges.

The beam into gas shots went very well and the first part of the Plan was carried out in the first 7 shots of the run. To facilitate reaching a constant fill pressure, the gate valve was closed during the shot. The TF and vertical vields reproduced extremely well, and the shot-to-shot variation in pressure was acceptable.

The MP 501 shots were more difficult, as it was found that moving the ICRH resonance to the outside resulted in early disruptions once the ICRH turned on. After a number of tries, it was decided to try inside resonance (lowering the field to ~ 4.4 T.) These were successful after moving the x-point up 1 cm, although after a few full length shots the ITB discharges disrupted near the end of the current flat-top. But these shots were useful for getting the PCI data that the run was designed for.

After a strongly peaked ITB shot at 4.3 T, namely shot 30, the ITB part of the run was terminated and the rest of MP 491 was carried out. During these last 3 shots, cooling of the magnet was suspended in order to begin the warmup of the machine as this was the last run of the 2007 campaign.

Scorecard: 33 shots, 10 "beam into gas", 2 no-power shots, 21 plasmas of which there were no fizzles even though most of them disrupted. The last 10 plasma shots all featured ITB's and while most disrupted near rampdown, they were of sufficient length to get the data which the MP called for.

Session Leader Comments
Aug 31 2007 09:32:04:757AM1070831001Jin-Seok Koratiometic was off, but mks gave ~ 1.5 (too high)

will try again with a lower value

MSE signal is good.

We are going to control the gas (maintain the constant gas)
not by the secondary puffing in the middle of the pulse,
but by closing the gatevalves after the first puffing.
Aug 31 2007 09:26:16:060AM1070831002Steve ScottThis shot is good. Pressure = 0.6 mTorr. good DNB, good fields.

This is shot #1 of the reproducibility scan.
Aug 31 2007 09:30:42:257AM1070831002Jin-Seok Koratiometic was on, mks shows ~ 0.5 mTorr : good enough

MSE signal is good.
Aug 31 2007 09:54:56:497AM1070831003Steve Scottgood, but torus pressure is about 0.1 mTorr lower (20%). Wolfe suggests that maybe we're getting less and
less gas evolved off the inner wall. So we will ask for 7% more gas on the next shot.
Aug 31 2007 10:00:39:317AM1070831003Jin-Seok Komks decreased by about 10% (0.1 mTorr) from the previous value.

The deviation from the first pressure value starts at the beginning of
the dnb pulse. Maybe the DNB is pumping the gas.

In the worst case (pitch angle ~ 10 deg) , pitch angle error is

2.5 deg / 2.5 mTorr = 1 deg/mTorr

from Fig 7 in memo 68b.

So we will have an error, at maximum, of

1 deg/mTorr x 0.1 mTorr = 0.1 deg

which should be much smaller than what we are seeking for to study
the reproducibility (1 ~ 2 degrees)

MSE signal is good.

For the next shot, gas puffing will be increased by 7%.
Aug 31 2007 09:58:04:593AM1070831004Steve Scottgood. pressure is about like previous shot: a little larger at the start of the shot, and about the
same at the end. next shot: increase gas by 5%, hoping to maintain these conditions approximately.
Aug 31 2007 10:01:46:053AM1070831004Jin-Seok KoGas pressue was constant.

Next shot, puffing will be increased by another 5%.
Aug 31 2007 10:09:50:550AM1070831005Steve ScottGood shot. Number 4 of the scan. DNB current is a little higher, and it suffered a small glitch near
the end. Torus pressure just a little higher than before.
Aug 31 2007 10:11:24:020AM1070831005Jin-Seok KoGas pressue was constant. Actually, a little bit increasing.
So no additional gas puffing increase for the next shot
Aug 31 2007 10:24:17:697AM1070831006Steve Scottgood shot. Number 5 and last member of this reproducibility scan.
Pressure is just a little higher than previous shots, but still less than
shot #2.
Aug 31 2007 10:39:12:330AM1070831007Steve ScottNew beam-into-gas configuration: constant BT, EF3 and EF4 and torus pressure.
We got what we asked for: EF3=9.5, EF4=4. very constant torus pressure
this ends MP491 for the morning.
---------------------------------------------
Aug 31 2007 11:40:45:530AM1070831010Catherine FioreGood plasma, but short rf pulse, h-mode at limited power. No ITB.
Aug 31 2007 11:59:59:323AM1070831011Catherine FioreGood plasma, rf power dropped just past 1 s. No ITB.
Aug 31 2007 12:12:19:093PM1070831012Catherine FioreDisruption at 0.8s. We are going to lower the current slightly to try and move the resonance a little bit further away from the antenna.
Aug 31 2007 12:19:22:777PM1070831013Catherine FioreDisruption at 0.8s.
Aug 31 2007 12:30:03:683PM1070831014Catherine FioreDisruption again. We are going to try turning off j-port and getting 2 MW total out of D & E.
Aug 31 2007 12:42:28:140PM1070831015Catherine FioreDisruption again. We are going to try turning off the rf.
Aug 31 2007 01:01:22:780PM1070831016Catherine FioreOhmic shot, ran fine. We are going to turn the rf on at 0.8 instead of 0.6.
Aug 31 2007 01:14:38:300PM1070831017Catherine FioreThe plasma disrupted with the rf. We are going to lower the field to 5.4 T and see if it will run.
Aug 31 2007 01:25:01:410PM1070831018Catherine FioreGood plasma, good h-mode. We'll try 6.2 T in two steps, 5.9 T then 6.2 T.

We are missing Thomson on shots 17 and 18. I have turned the laser back on.
Aug 31 2007 01:34:48:907PM1070831019Catherine FioreDisrupt again at 5.9 T. I don't think the resonance is close to the antenna at all. We have decided to go to 4.5 T.

Aug 31 2007 01:48:28:303PM1070831020Catherine FioreDisrupt again at 4.5 T.

Aug 31 2007 02:05:03:563PM1070831021Catherine FioreFinally, a weak ITB. The PCI window was a little too early. We are going to re do the shot at slightly lower field, 4.4 T.
Aug 31 2007 02:18:47:397PM1070831022Catherine FioreITB which ended prematurely with a back transition. We'll try and repeat the settings.
Aug 31 2007 02:53:03:543PM1070831023Catherine FioreGood ITB, good data. The fluctuations are there, although not as strong as we have seen with LFS ITB's. The PCI masking has now been changed to see the lower half of the plasma.
Aug 31 2007 03:11:22:197PM1070831024Catherine FioreGood ITB, good data. Some fluctuations are showing up on the PCI. We'll repeat with earlier RF input.
Aug 31 2007 03:25:55:670PM1070831025Catherine FioreGood ITB, good data with fluctuations. Back transition at 1.2 s followed by a terminal disruption. Repeat. Note, Ar was increased to 60 ms on this shot.
Aug 31 2007 03:38:26:283PM1070831026Catherine FioreGood ITB, good data with fluctuations. The PCI masking is being changed on the next shot.
Aug 31 2007 03:57:50:300PM1070831027Catherine FioreWeak ITB, good data with fluctuations. Repeat.
Aug 31 2007 04:09:32:723PM1070831028Catherine FioreGood ITB although it ended early. Maybe the best of the day. Good data with fluctuations. Repeat.
Aug 31 2007 04:21:53:650PM1070831029Catherine FioreGood ITB although it ended early. We believe we have our data set. We will lower the field slightly for the last shot to see if we can get a stronger ITB.
Aug 31 2007 04:33:23:400PM1070831030Catherine FioreThe ITB peaked much more quickly with the lower field. Most peaked shot of the day.
Aug 31 2007 04:56:57:560PM1070831031Steve Scottresume MP491: beam-into-gas
This is a repeat of shot 6. Good repeat. DNB timing is same as shot 6.
Aug 31 2007 05:16:10:997PM1070831032Steve ScottRepeat shot 31, but move dnb to start at 0.4 sec.
Good shot. Pressure just a little lower.
Aug 31 2007 05:19:39:377PM1070831033Steve Scottrepeat shot 007: constant Bt, EF3 and EF4, but move dnb to start at 0.4 sec.
result: good. Pressure just a little lower, and TF is just a little lower,
possibly due to the higher resistance (we have operated with no TF cooling on shots
31, 32, and 33).

END of FY07 run campaign!

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


Physics Operator Comments
Aug 31 2007 08:55:04:560AMSteve Wolfe
load from 1070529026, which is beam into gas
gas puff on pg4 is from [-.6,-.1] 
we will try running this with gv closed in pulse
Need to increase the gain on ef3 to get to flattop and hold it. 
EF3 P gain from 6 to 9.9, start flattop at 1.3 to give it some time
Zero wires 4 and 6 (not used)

Load seg2 from 1070529008 and extend tf pulse to 1.7sec


Aug 31 2007 09:07:26:923AM1070831001Ron ParkerReady for first beam into gas shot. Thanks to Steve W. for setting it up.
Aug 31 2007 09:20:07:677AM1070831001Ron ParkerFirst shot went well, but pressure was too high by afactor of 3. Also, Ratiomatic was off for this shot. EF3 and TF fields were fine.
Pulse gas was set to 0.5 s, for next shot it will be 1.67 s.
Aug 31 2007 09:26:56:563AM1070831002Ron ParkerShot 2 was on the money regarding fields and fill pressure.

Next 4 shots will be carbon copies (hopefully).
Aug 31 2007 09:50:24:300AM1070831003Ron ParkerShot 3 had about 7% less pressure than the preceeding one, therefore we will increase the pulse gas pulse width by 7% for next shot, from .167 to ,179 s
Aug 31 2007 10:01:14:850AM1070831004Ron ParkerPressure did increase early in pulse but was still not high enough.

For next pulse, the gas pulse width will be 0.188 s
Aug 31 2007 10:17:18:203AM1070831005Ron ParkerShot 5 was OK, one more like this, then the last shot called for in Jin-Seok's plan.
Aug 31 2007 10:28:32:767AM1070831006Ron ParkerShot 6 was fine, now we'll take the last shot in Jin-Seok's run plan.


Aug 31 2007 10:57:27:687AM1070831007Ron Parkershot 7 ran as programmed, completing the first part of the beam into gas miniproposal.
Aug 31 2007 10:57:40:463AM1070831008Ron ParkerNow we start Catherine's run. Hopefully a 1 MA, ITB shot coming up.
Aug 31 2007 11:01:49:173AM1070831008Ron ParkerOoops, a no power shot.
Aug 31 2007 11:20:34:077AM1070831009Ron ParkerOh-Oh, another problem on the way to pulse. Stay tuned.


Aug 31 2007 11:40:34:420AM1070831010Robert GranetzGranetz substituting as physics operator for Ron for about an hour. Ron has
already loaded DPCS for shot 10.
Aug 31 2007 11:47:34:727AM1070831010Robert GranetzShot 10 -- Plasma. Good shot. ICRF not so good.

Next shot: repeat for ICRF. No DPCS changes.
Aug 31 2007 11:57:48:430AM1070831011Robert GranetzShot 11 -- Plasma. Good shot. Better H-mode, but still no ITB. D-port ICRF ran well
at 0.75 MW, but E and J are still faulting a lot.

Next shot: no DPCS changes
Aug 31 2007 12:08:59:493PM1070831012Robert GranetzShot 12 -- Plasma. Disrupted at t=0.85 s. H-mode; no ITB.

Next shot: drop Ip to 0.9 MA.
Aug 31 2007 12:22:18:327PM1070831013Robert GranetzShot 13 -- Plasma. Disrupted at t=0.79 s. Looks like an impurity injection at t=0.76 s.

Next shot: increase outer gap by 2 mm (move RCUR in by 1 mm)
Aug 31 2007 12:27:53:743PM1070831014Robert GranetzShot 14 -- Plasma. Early disruption again.

Ron has returned as physics operator just after this shot.
Aug 31 2007 12:43:06:830PM1070831015Ron ParkerShot 15 disrupted again. For next shot, we'll turn off all Rf.

(Last shot had J off)
Aug 31 2007 01:02:11:793PM1070831016Ron ParkerThat shot was Ohmic only, to see if it is in fact the RF that leads to the disruption, which is apparently the case since the shot ran full length. So now we'll put D&E on, and move the RF to 0.8 s, where the stike point is on the side wall of the divertor, at least according to EFIT.
Aug 31 2007 01:19:31:917PM1070831017Ron ParkerDscharge again disrupts, shortly after RF turns on.

Is it the fact that the resonance is too close to antenna? To see, we'll keep BT at 5.4 T on next shot.
Aug 31 2007 01:34:46:800PM1070831018Ron ParkerAt 5.4 T, a full length plasma with H-Mode and 2 MW from D&E
Aug 31 2007 01:35:40:783PM1070831019Ron ParkerThis shot had Bt = 5.9 and it disrupted.

So now we'll see if we can get a high field ITB.
Aug 31 2007 01:54:09:233PM1070831020Ron ParkerAgain, it disrupted even though the resonance was on the inside! So apparently it is not the resonance position that is the cause of the disruption.

Next, we'll move the lower X-point out by 1 cm.
Aug 31 2007 02:05:00:907PM1070831021Ron ParkerSuccess! Full length discharge with ~2.2 MW, devolving into ITB toward end of shot. Next: Lower field to 4.4 T
Aug 31 2007 02:24:43:767PM1070831022Ron ParkerAgain, a full length shot. Shot went into H-Mode but came out at 1.25 s, at whch time it reformed. Next: try again.
Aug 31 2007 02:34:06:153PM1070831023Ron ParkerShot 23 ran OK, full length, full length with ITB formation.

Short break coming up for cell access.
Aug 31 2007 03:11:32:353PM1070831024Ron ParkerPlasmas resume, shots appear reproducible.

This shot went full length, similar to the last several shots.

Next: same shot, a little more RF power and earlier RF turnon.
We are turning Argon on for this shot, 60 ms. Be prepared for disruption!
Aug 31 2007 03:19:32:630PM1070831025Ron ParkerShot disrupted at ~ 1.4 s, as anticipated.

Try 50 ms worth of Ar on next shot.
Aug 31 2007 03:32:56:900PM1070831026Ron ParkerShot 26 ran well, until disrupting beginning at ~ 1.3 s. RF power or Ar lvel?

Meanwhile, cell access to change PCI mask.


Aug 31 2007 03:50:30:537PM1070831027Ron ParkerShot 27 ran OK, disrupting toward rampdown,
Aug 31 2007 04:21:19:803PM1070831028Ron ParkerSame thing on shot 28. ITB forms, plasma disrupts.
Aug 31 2007 04:22:09:947PM1070831029Ron ParkerThe shots continue, disrupting near end of ITB.

"One more shot" coming up.

Engineering Operator Comments
ShotTimeTypeStatusComment
109:06:43:080AMTestOkBeam into Gas
209:21:57:100AMTestOk
309:37:33:970AMTestOk
409:52:57:477AMTestOk
510:05:36:480AMTestOk
610:19:40:720AMTestOk
710:33:55:180AMTestOk
810:56:20:397AMPlasmaBad Igor hung
911:17:01:323AMPlasmaBadEF1 did not charge
1011:33:32:910AMPlasmaOk
1111:47:39:117AMPlasmaOk
1212:00:13:340PMPlasmaOk
1312:12:49:203PMPlasmaOk
1412:25:25:130PMPlasmaOk
1512:37:57:040PMPlasmaOk
1612:50:24:790PMPlasmaOk
1701:02:47:780PMPlasmaOk
1801:15:12:110PMPlasmaOk
1901:28:07:663PMPlasmaOk
2001:44:10:720PMPlasmaOk
2101:56:39:190PMPlasmaOk
2202:09:00:490PMPlasmaOk
2302:21:44:417PMPlasmaOk
2402:57:08:033PMPlasmaOk
2503:13:52:090PMPlasmaOk
2603:27:57:410PMPlasmaOk
2703:47:10:377PMPlasmaOk
2803:59:58:553PMPlasmaOk
2904:15:48:093PMPlasmaOk
3004:28:15:720PMPlasmaOk
3104:51:31:663PMTestBadMSE Calibration
3205:01:13:270PMTestBad
3305:11:25:257PMTestBadMSE Calibration LAST SHOT

System Availability
Aug 31 2007 09:06:22:733AM
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 and operational, data in the tree. Outboard midplane AXUV calibrated and operational, data in the tree. Full midplane and divertor views being digitized.Jul 19 2007 04:48PM (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-ECEyesChs 17-32 workingAug 27 2007 01:11PM (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. 4-strap configuration. Max ~ 3 MW.Jul 17 2007 03:52PM (ylin)Steve WukitchJ-port antennawukitch,ylin
Lower HybridyesLH is available with transmitters 2-11 working.Aug 24 2007 11:36AM (dterry)Ron ParkerLower Hybriddterry,parker
LPIyes Apr 26 2007 08:35PM (bose)Earl MarmarLithium Pellet Injectorbose,marmar
Ly-alphayesMidplane calibrated and operational, data being stored in tree. Divertor views showing significant noise, and not available. Upper view being digitized and analyzed.Jul 19 2007 04:49PM (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
ReflectometeryesThe 50, 60, 75 and 88 (u,l and center) are installed. The variable frequency channel is being tested. 110 is not functioningAug 16 2007 01:45PM (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, 8 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Old spectrometers have been removed. Additional spatial channels have been added, but are not yet calibrated. Aug 07 2007 10:08AM (jwhughes)Jerry HughesCore Thomson scatteringjwhughes,yma
TS - Edgeyes2 lasers, 20 spatial channels. Fiber holder position is -121.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015.Aug 07 2007 10:08AM (jwhughes)Jerry HughesMillimeter resolution edge Thomson scatteringjwhughes,yma
Vispecyes350 and 670 nm, 4 spatial channelsMay 04 2007 01:02PM (agraf)Alex GrafVisible Spectrometeragraf