Alcator C-Mod Run 1070802 Information

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Miniproposals
Miniproposal:498
Date Filed: 7/10/2007
Title:Density Peaking at Low Collisionality
First Author:Martin Greenwald
Session Leader:Martin Greenwald (shots 20-28)
Miniproposal:515
Date Filed: 7/27/2007
Title:Effect of launched LH wave nll spectrum on current profile
First Author:Ron Parker
Session Leader:Ron Parker (shots 1-19)

Operators
Session leader(s):Ron Parker,Martin Greenwald
Physics operator(s):Ian Hutchinson
Engineering operator(s):Andy Pfeiffer,Ed Fitzgerald,Bill Parkin

Engineering Operator Run Comment
MP 515: Effect of launched LH wave n_par spectrum on current profile Ses

Session Leader Plans
Entered: Aug 2 2007 03:10:48:803PM
Author: Martin Greenwald
MP 498 Density peaking at low collisionality

The goal is to extend the range of low density H-modes in the nu_eff, q95 plane, That will require Line-AVERAGE densities below 2e20 and current below 1 MA.

We're trying to get an early start on tomorrow's run. The plan will be:

We will try to follow the approach from 1070614 (which was H-mode cryopump studies.) Shot 13 is a good example of what we're look for. In that run, ssep was scanned from slightly negative to slightly positive - hysteresis and a healthy amount of RF power was sufficient to maintain the H-mode. However we want to avoid control problems associated with the ssep control. An option - to be discussed by operators - is to hold the xpoints fixed and move Zcur.

0. Start with
The machine should be boronized.
The cryopump should be available
Ip = 0.7MA
Bt = 5.4 T
target nl_04 = 0.6e20

1. Once we have established an approach, try to find the lowest density where H-mode is accessible.

2. Drop Ip to 0.5 MA - scan down in density

3. Drop Ip to 0.4 MA - scan down in density

4. At 0.4 MA - raise density in steps until H-mode is lost

5. Raise Ip to 0.85 MA - scan to lowest density

We will want some Argon for HIREX, gas puff for IW CXR, DNB for other CXR

Physics Operators Plans

Session Leader Summaries
Entered: Aug 2 2007 02:31:29:913PM
Author: Ron Parker
The run was troubled by two problems, one the outside temperature which caused the temperature in the LH HV power supply to exceed its trip set point (preventing the breaker from going in), the other a hot spot on the moly limiter protecting the LH grill. The latter prevented the net LH power to be raised over 400 kW without disruption. Changing n_par to 2.3 did not help, as disruptions still occured due to the hot spot on the moly limiter. The hot spot looked like it was also connected to the other limiter, following field lines. No hot spot occurred without LH power. This is new for the LH and may have been a consequence of the specific plasma shape. During periods of LHRF, decreses in loop voltage were observed at levels consistent with earlier observations. Unfortunately due to the above problems, very little useful data were obtained.
Entered: Aug 2 2007 05:21:35:983PM
Author: Martin Greenwald
We made a good start on tomorrow's run. We can start tomorrow, with the last shot from today. We had 9 shots (20-28), there were a couple of fizzles

The equilibrium was adjusted to scan from slightly LSN to DN/USN. We did not run the cryopump - which we will do tomorrow. The target density was then gradually lowered, nebar reaching 0.8e20 on shot 28

There were problems with radiated power, boronization tonight should help with this as well.

Shots of interest were:
nebar_target nebar_hmode
1070802021 1.3 1.7
1070802022 1.3 1.8
1070802025 1.2 1.8
1070802026 1.0 1.7
1070802027 1.0 1.5
1070802028 0.8 1.5

Physics Operator Summaries
Entered: Aug 2 2007 05:03:43:400PM
Author: Ian Hutchinson
Summary

We had some PS problems early. Then LH had a problem with overheating
of its power supply. After struggling for some time, it was decided to
move in the afternoon to the ssep scan with low collisionality. The
problem of control and notably loss of control because of EF2 railing
was solved by drastically reducing the ICEF4 gain and setting its
level to zero. This allows EF2byEF4 to do its job.


Scorecard

  Shot,Duration(s),Ipmax(MA),Result  Shot,Duration(s),Ipmax,Result
  |   01   0.000   0.028   Dud     |   02   1.987   0.838   Plasma  |
  |   03   1.137   0.835   Plasma  |   04   0.000   0.006   Dud     |
  |   05   0.000   0.002   Dud     |   06   1.991   0.838   Plasma  |
  |   07   1.991   0.836   Plasma  |   08   1.019   0.837   Plasma  |
  |   09   0.000   0.041   Fizzle  |   10   1.010   0.839   Plasma  |
  |   11   0.000   0.043   Fizzle  |   12   1.994   0.843   Plasma  |
  |   13   1.064   0.838   Plasma  |   14   1.993   0.843   Plasma  |
  |   15   1.994   0.824   Plasma  |   16   1.993   0.841   Plasma  |
  |   17   1.992   0.828   Plasma  |   18   1.992   0.841   Plasma  |
  |   19   1.994   0.834   Plasma  |   20   1.980   0.634   Plasma  |
  |   21   1.977   0.646   Plasma  |   22   1.974   0.653   Plasma  |
  |   23   0.000   0.055   Fizzle  |   24   0.000   0.047   Fizzle  |
  |   25   1.981   0.674   Plasma  |   26   1.986   0.680   Plasma  |
  |   27   1.990   0.676   Plasma  |   28   1.987   0.680   Plasma  |
 
Date 1070802:  28 shots.  21 plasmas.   4 fizzles.   3 duds.   0 System Error.
        (Plasma = Ip gt 60.0 kA   Dud = H_alpha lt  0.40 V)
Total plasma duration: 38.03 s (exceeding -100 kA)


Session Leader Comments
Aug 1 2007 03:20:20:010PMRon ParkerSession Leader Plan for Run 1070802

MP 515: Effect of launched LH wave n_par spectrum on current profile

Session Leader: R. Parker
Physop: I. Hutchinson

The purpose of these experiments is to investigate the effect of varying the launched n|| spectrum on the LH-perturbed current distribution in C-Mod plasmas. The measurements will be carried out in both Ohmic and ICRF-heated L-Mode plasmas, as well as in H-Mode plasmas providing suitable low density H-Modes can be produced.

Overnight ECDC, usual formula.

Power systems as on 1070619

A-coil configuration: normal [Dtop -Dbot -Jtop +Jbot] and 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)
leave NINJA as is DISABLED

Enable the following gate valves and shutters: ECE, VUV, Z-bolo shutters, NB

Torvac setup: Gate valves open during pulse.

ICRF: E-port ready at beginning of run; also J-port if feasible

Starting shot: 1070619008

Following the advice of the EPC, we'll concentrate on n|| scans in the run:

Shots 1-5: Establish 800 kA, 5.4 T, 5e19 m-3 discharge. Couple â?¥500 kW LHCD @ n|| = 1.6. Ensure plasma stays in L-Mode with available ICRF power (J-port preferred but if not, E-port is OK), Optimize shape for coupling.

Shots 6-10: No ICRH. Obtain good quality MSE and IXS data on shot established in shots 1-5.

Shots 11-15: Repeat shots 6-10 with ICRH = 1 MW and higher if available.

Shots 16-20: Couple â?¥500 kW LHCD @ n|| = 2.3. No ICRH. Obtain good quality MSE and IXS data.

Shots 21-25: Repeat shots 16-20 with 1 MW and higher if available, avoiding H-Mode.

Shots 25 - end of run: Repeat above shot sequence beginning with shot 16, with n|| = 3.1.

Note: If ICRF part of plan is unproductive, stick with Ohmic and increase n to 8e19 m-3.





Aug 2 2007 09:00:25:350AM1070802001Ron ParkerFirst shot: Dud, no EF2
Aug 2 2007 10:07:26:147AM1070802002Ron ParkerShot 2 ran, but LH tripped due to filament fault. Problem was in the "readback" circuit. The fault sensor will be bypassed.
Aug 2 2007 11:00:42:100AM1070802006Ron ParkerShot 6 ran well with LH, delta V ~ 0.4 V.
Aug 2 2007 11:01:19:740AM1070802007Ron ParkerShot 7 OK, full length LH w/o fault.
Aug 2 2007 11:29:55:007AM1070802008Ron ParkerShot 8 disrupted.
Aug 2 2007 12:09:41:600PM1070802012Ron ParkerWe are having temperature problems in the LH power supply -- T has reached 120 deg and this prevents closing the breaker. Shot 12 was a shot w/o LH. George is trying to cool things down by installing additional fans.
Aug 2 2007 03:07:37:110PM1070802021Martin GreenwaldWe're getting an early start on tomorrow's run - mostly discharge development.

First shot in the series had a short H-mode, ssep probably went more positive than we want for the available power.

The density drooped appropriately...
Aug 2 2007 03:23:28:240PM1070802021Martin GreenwaldH-mode was longer, but temperatures and stored energy are still quite low.

Ip ~ 0.6 MA
nebar ~ 1.8-1.6 in H-mode



Aug 2 2007 03:31:21:530PM1070802022Martin GreenwaldICRF moved to 0.5 seconds to provide heating while topology is still LSN.

A fairly weak h-mode from 0.53 to 0.9 seconds
Aug 2 2007 03:41:03:197PM1070802023Martin Greenwaldfizzle
Aug 2 2007 03:52:14:850PM1070802024Martin Greenwaldfizzle - leak?
Aug 2 2007 04:39:44:890PM1070802026Martin GreenwaldH-mode, with a dropout early



Aug 2 2007 04:41:32:640PM1070802027Martin GreenwaldMultiple h-modes and RF trips
Aug 2 2007 05:04:28:260PM1070802028Martin GreenwaldMultiple H-modes again, but probably the best performance today.

Physics Operator Comments
Aug 2 2007 08:55:53:423AMIan HutchinsonLoad from 1070619008.

Need to call all predictors.

Load got wolfe's new complaint.

Import segment 1 from 1070801032. Call zeroed ssep, wire 11.
Not obviously broken.
Loaded
Aug 2 2007 09:02:18:773AM1070802001Ian HutchinsonDud. No EF2 operator error.
Aug 2 2007 10:28:19:140AM1070802003Ian HutchinsonRaised plasma zcur by 0.5cm and zxl by 0.5cm at LH request.

Disrupts at 1.1s. Not obvious why. There is a position problem but there's a lot else going on too. A-coil is misbehaving. Apparently there's a locked mode.
Also EF2U appears to single-phase, forcing strange currents in other coils.
Power supply checks and tests.

Add 100ms to Bt and Ip flat top.
Move zxu up to 6cm from 5cm.
Fill puff to 20ms.
Load
Aug 2 2007 10:28:27:297AM1070802004Ian HutchinsonPS test
Aug 2 2007 10:28:37:077AM1070802005Ian HutchinsonPS test.
Aug 2 2007 11:00:15:943AM1070802006Ian HutchinsonPlasma.
Aug 2 2007 11:14:50:723AM1070802007Ian HutchinsonPlasma.

Extend TF pulse to 2.2 sec because of coax worries.
Increase Rcur offset to 1400 from 1200 to increase Bz ramp rate.
Aug 2 2007 11:28:08:863AM1070802008Ian HutchinsonPlasma disrupts at 1s following a big injection at 0.98s.


Aug 2 2007 11:43:21:850AM1070802009Ian HutchinsonFizzle.

Rcur offset returned to 1200.
Aug 2 2007 11:53:59:677AM1070802010Ian HutchinsonPlasma disrupts at about 1s. Very similar to shot 8. Impurity injection.

Reduce Rcur by .15cm to increase the right gap by 3mm.
Aug 2 2007 12:07:13:863PM1070802011Ian HutchinsonFizzle.

Rcur offset to 1000.
Fill puff to 18ms.
Aug 2 2007 12:22:40:007PM1070802012Ian HutchinsonPlasma to rampdown. No LH.
Aug 2 2007 12:39:42:137PM1070802013Ian HutchinsonPlasma disrupts at 1.05s with LH.

This is a circumstantial demonstration that the disruption is caused by LH.
The wide-angle camera sees a bright spot that correlates with the LH.
Aug 2 2007 01:01:48:443PM1070802014Ian HutchinsonPlasma to rampdown. NO LH.

Move rcur an additional 1.5mm in.
Set zxu to +7cm.
Aug 2 2007 01:39:51:290PM1070802015Ian HutchinsonPlasma to rampdown. LH tripped (new phasing).

Noticed that the segment 1 current demand on Ip is very low .25MA.
Imported segment again to prove I did not make an error.
Imported 15 segment to get back to where we were.
Turn off gain on IP in segment 1.

Add back 1.5mm to rcur.
RXu to 4cm from 4.5cm.
Aug 2 2007 02:08:29:903PM1070802016Ian HutchinsonPlasma to rampdown. Very nearly killed by LH radiative event.

Move plasma in by 2.5mm after 1.2s.
Lower rxu to 3cm from 4cm.
Change of plans. Move plasm in by 5mm for the whole flat top for ICRF.
Aug 2 2007 02:23:02:433PM1070802017Ian HutchinsonPlasma. Made a mistake and moved out. Seems to be on the limiter.

Put correct rcur setting in.
Aug 2 2007 02:32:20:650PM1070802018Ian HutchinsonPlasma. ICRF test.

Move plasma out to give LH-suitable gap. Leave in after 1.2s.
Aug 2 2007 03:01:03:213PM1070802019Ian HutchinsonPlasma to rampdown. LH ran.

Load from Wolfe's DN shot 1070803305.
Fill puff to 20ms from 27ms.
Aug 2 2007 03:06:34:657PM1070802020Ian HutchinsonPlasma.Successfully got the swing from lower to upper null.


Zxu to +.5 from 1.cm decrease the ssep upper null.
Aug 2 2007 03:26:34:197PM1070802021Ian HutchinsonPlasma.


Lengthen TF pulse to avoid downward glitch.
Aug 2 2007 03:40:26:493PM1070802022Ian HutchinsonPlasma. RF at .5s.

Tweak x-point positions.
Lower NL04 early to try to get better H-modes.
Lower zcur to .003 during upper null, SL request.
Aug 2 2007 03:54:11:057PM1070802023Ian HutchinsonFizzle.

Fill puff to 18ms.
Aug 2 2007 04:06:50:180PM1070802024Ian HutchinsonFizzle. The leak is reported to be worse at present.

Rcur offset to 700 from 900.
Aug 2 2007 04:22:06:980PM1070802025Ian HutchinsonPlasma to rampdown. Some injections.

Lower nl05 to 5e19.
Lower fill puff to 16ms.
Set Ar puff to 50ms from 100ms.
Aug 2 2007 04:39:17:280PM1070802026Ian HutchinsonPlasma to rampdown.

Actually Ar was not enabled.
Lower the gas V during the shot to keep the nl04 a bit lower.
Aug 2 2007 05:00:46:150PM1070802027Ian HutchinsonPlasma to rampdown.

Lower nl04 to 4e19
Aug 2 2007 05:03:12:730PM1070802028Ian HutchinsonPlasma to rampdown.

Engineering Operator Comments
ShotTimeTypeStatusComment
108:58:38:817AMPlasmaBadNo TMX
209:11:16:880AMPlasmaOk
309:33:19:763AMPlasmaOk
410:14:22:797AMTestOkEF2U PLC Test
510:25:57:607AMTestOkEFC 800 volts 1000 Amps
610:36:50:710AMPlasmaOk
710:54:03:340AMPlasmaOk
811:11:49:520AMPlasmaOk
911:24:31:593AMPlasmaOk
1011:37:07:797AMPlasmaOk
1111:50:58:297AMPlasmaOk
1212:05:18:970PMPlasmaOk
1312:20:08:987PMPlasmaOk
1412:41:03:120PMPlasmaOk
1512:55:15:980PMPlasmaOk
1601:30:51:830PMPlasmaOk
1702:04:35:773PMPlasmaOk
1802:17:14:693PMPlasmaOk
1902:29:46:350PMPlasmaOk
2002:48:41:057PMPlasmaOk
2103:05:42:313PMPlasmaOk
2203:21:19:750PMPlasmaOk
2303:35:33:800PMPlasmaOk
2403:49:27:770PMPlasmaOk
2504:04:53:943PMPlasmaOk
2604:20:26:100PMPlasmaOk
2704:36:52:777PMPlasmaOk
2804:55:54:750PMPlasmaOk

System Availability
Aug 2 2007 08:58:16:397AM
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-ECEnoOnly high frequency channels now working (17 to 32). Ch 22 has bad video amp. LO is OK. Problem looks to be in mixer amp unit.Jul 11 2007 10:52AM (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 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 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
Reflectometeryes50, 60, 75 88, 88l,88u and 110 are operational. 60GHz is a little noisy. Variable frequency channel has just been modified (on 1070731) and is being tested.Aug 01 2007 09:15AM (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, 10 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.Jul 11 2007 09:18AM (jwhughes)Jerry HughesCore Thomson scatteringjwhughes
TS - Edgeyes2 lasers, 20 spatial channels. Fiber holder position is -120.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015.Jul 24 2007 06:49PM (jwhughes)Jerry HughesMillimeter resolution edge Thomson scatteringjwhughes
Vispecyes350 and 670 nm, 4 spatial channelsMay 04 2007 01:02PM (agraf)Alex GrafVisible Spectrometeragraf


Aug 2 2007 09:10:59:630AM
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-ECEnoOnly high frequency channels now working (17 to 32). Ch 22 has bad video amp. LO is OK. Problem looks to be in mixer amp unit.Jul 11 2007 10:52AM (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 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 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
Reflectometeryes50, 60, 75 88, 88l,88u and 110 are operational. 60GHz is a little noisy. Variable frequency channel has just been modified (on 1070731) and is being tested.Aug 01 2007 09:15AM (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, 10 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.Jul 11 2007 09:18AM (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 02 2007 09:02AM (jwhughes)Jerry HughesMillimeter resolution edge Thomson scatteringjwhughes,yma
Vispecyes350 and 670 nm, 4 spatial channelsMay 04 2007 01:02PM (agraf)Alex GrafVisible Spectrometeragraf