Alcator C-Mod Campaign 2004 Experiments

The following table is based on the tabulation of high priority Physics experiments generated following the C-Mod Ideas Forum and subsequent submissions.


 

Topic/Experiment

MP#

Proposer(s)

Dates

Complete FY04
Priority

Run Days

ITPA/
ITER


RF

BT

DNB

Edge/Divertor

 

B. Labombard (coordinator)


 
 
     
 Turbulence Imaging near density limit. Experiment/Theory Comparison 319
Terry, Zweben
1020919
1031204(1/2d)
1040115
  1
1

none -5.4
 
Edge plasma flows in upper vs lower x-point discharges
335
LaBombard
1030619
1030630(1/2d)
1031114
1031118(1/2d)
1031124(1/2d)

1
1
ITPA
(DSOL6)
none
-5.3

New approach to study of turbulent edge plasma fluctuations
332
Grulke
1030603
1030604(1/2d)
1030613(1/2d)
1031113
1031204(1/2d)

1

.5

c)>2MW
-5.4

Edge Turbulence Statistics
(piggyback-
Inner/outer SOL comparison
Effect of Inner Divertor mod.
Poloidal flows in SOL
311
LaBombard,Carreras, et al.
1020809
1030522
  2
1

none
-5.4  
Fiducials to characterize boronization

Lipschultz



(0.7)

78/80 MHz
-5.4

Instrumented Divertor Leakage Experiments
313
LaBombard
1020725

0
1

none
-5.3

Inner Wall screening of impurities
365 Lipschultz


1
0.5




Preliminary study of edge impurity "holes"

Terry


1
0.5




Measurement of wall pumping rate
364 Lipschultz
1031104
1031106
1031107

1
0.5




Neutral Wind Effect on GPI

Terry/Zweben


2
1




Drift-Alfven RBM Scaling of near-SOL State

LaBombard


3
1




Turbulence with limiter discharges

Terry/Zweben


3
1




Turbulence imaging of L/H trans and ELMs

Terry,Zweben



pb




Search for CX lines from ...

Valisa



pb




Magnetic Fluctuations associated with edge plasma turbulence
393 LaBombard
1040414(3/4d)







Transport

 

  D. Mossessian

(coordinator)


 
 
     
Interplay between confinement, turbulence, and magnetic topology
367A Basse
1031203
1040319(1/2d)

1
1




Toroidal rotation via neutral viscosity

Catto


2
.5




Further studies of QC mode
372 Terry
1040122

3
1




Ohmic EDA studies using the A-coil
368 Sampsell
1031121(1/2d)

4
1




Phase Space for ELMy/EDA regimes
304
Mossessian
1020930
1021008(1/2d)
1021009
1021031
1031218
  5
2

78/80 MHz -5.4  
LH Thresholds in LSN,DN,USN plasmas
363 Hubbard
1031124(1/2d)
1031125
1040106(1/2d)

6
1
(ITPA)



Variation of Important Dimensionless Parameters controlling L-H Dynamics

Carrerras,Hubbard


7
1




Edge Minority Heating
330A Zweben
1040220(1/2d)

8
1




Transient momentum transport studies with pellet injection

Scott


(2004)





Evaluate impurity transport coefficients and flow at the edge of an EDA H-Mode plasma

Granetz



pb




Evaluate the effect of D2 puffing on impurity transport at the edge

Granetz



pb




QC Mode-Radial Extent and High frequency companions
334A
Greenwald
1030703
1031121(1/2d)

(2004)


none
-5:-2.5

Measurements of poloidal distribution of neutral sources at the edge with a series of D-alpha arrays

Mossessian


(2004)





Comparison of EDA H-mode with HRS H-Mode on JFT-2M

Hubbard




ITPA



Test theories for anomalous particle transport in the absence of particle source or Ware pinch

Greenwald


(2004)





Similarity comparisons between C-Mod, JET, (DIII-D) at fixed nu* and fixed n/n_g

Cordey, Snipes,Petty,
Mossessian


(2004)

ITPA



Neutral/Plasma effects on pedestal widths
320 321
Mossessian
1021030
 
2

78/80 MHz
-5.4  
Triggering ELMs with current ramps
282
Mossessian
1030612(1/2d)
1030613(1/2d)




78/80 MHz
-5.4












Density Limits, Transport and Turbulence
306 Greenwald, Labombard
1021107(1/2d)







Local L-H threshold study using new diagnostics 137B or Rev. Hubbard
 
1

 78/80 MHz  -5.4  
Faraday Rotation Diagnostic development

Tejero, Irby
1021112(1/2d)




none
-5.4

Ohmic H-modes (rotation profile)
312
Lee
1020801
1020815
1021016


1

none
-4.3

Developing shape for C-Mod/JET identity experiment
315
Mossessian
(1020719)
1020904
1021104
1030606


1

1-3MW
80MHz
-5.4

MSE Calibration
259, 322
Yuh
1020627
1021004
1021107(.5pb)
1030521
1040115(1h)
1040121
1040304


1

none
-5.4
x
CXRS Commissioning
265
Rowan
1021017


1

none
-5.3
x
TF Scan rotation profile
325
Lee
1021105


1

80MHz
-4 : -6.1

Edge Minority Heating for H-mode Control
330
Zweben,Terry
1030604(1/2d)


1+

78-80MHz
2MW
-3.4:-6.8

Density Limits and Turbulence
333
Greenwald
1030523


1+

none
-6












Measurements of 80 kHz mode observed during off-axis RF ITB's
336
Lynn



1(pb?)

70,80MHz
-5.5
x
Temperature scale length measurements using Btor sweeps
337
P. Phillips



1

none
-5.4

Lots of Measurements of the QC mode
338
Sampsell



2

1 ohmic
1-5MW 78-80MHz
-5.2
-5.6:5.7
x
Investigation of fast edge response at the L-H transition
340
Hubbard
1030620


1

<4MW
-6.2

Density pedestals in L- and H-mode plasmas
342
Hughes
1030630(1/2d)


.5

1-3MW
-5.4

L-Mode Performance Evaluation
347
Greenwald
1030701


   1

3-4MW
-5.4

Measurements of ECE Broadband fluctuations
352
Lynn
1030702(.5pb)


3shots




Study of striations in Li pellet ablation clouds 353 Bose
1030709(pb)


.5+pb

3MW
-5.4

Hydrogen tail studies using deuterium DNB
354
Scott
1030715


1

?
-5.4,-4.1
x
Experimental Measurement of Neutral Penetration in H-mode Plasmas
369 Hughes 1040122(pb)

?
1+pb




Rotation and H-mode Threshold vs SSEP
375 Rice
1040123
1040220(1/2d)
1040409

?
(ITPA)



Shape development for joint EDA experiments with JFT2-M 381 Hubbard
1040128(1/2d)


1
ITPA
0
-5.4

C-Mod/JET dimensionless identity experiment at high field/current
382 Mossessian




ITPA
3-6MW
-8

Evaluation of edge MHD stability based on CXRS and MSE data and access to type I ELMy regime on C-Mod 383 Mossessian





6MW
-5.4
x
Experiments on Plasma Flows and the L-H Threshold: low density discharges, limited versus diverted topologies and the role of neutrals 384 LaBombard
1040213
1040325(1/4d)
1040326



ITPA
(DSOL6)
4MW
-5.7

Edge rotation and the L/H threshold - dependence on known scaling parameters 385 Greenwald
1040219
1040507(1/2d)


2
(ITPA)
6MW@78

50MHz
-5.4,-5.7,-3.4

Edge pedestal scalings at lower fields 396 Hughes
1040507(1/2d)




50 MHz


Comparison of C-Mod EDA and JFT2M HRS regimes
397 Hubbard
1040416







RF Heating & Current Drive Physics

 

  S. Wukitch

(coordinator)


 
 
     

Engineering & Operations (as long as it takes)

   
 
 
     
RF Conditioning
355
Wukitch
1031112
1031205
1031216(1/2d)
1040212(1/2d)
1040301
1040302(3sh)
1040309(1/4d)

high
5




D(He3) Heating at 8T
 203 Wukitch
1040331
1040407
1040421(1/2d)
1040423

high


78MHz


Initial test of load tolerant ICRF matching network on E-antenna
360 Parisot
1040129


0.5

50 or 78MHz


Evaluate Pre-matching network
349 Parisot
1031104
1031106
X

0.5




Influence of ne and Te, RF power density, and H concentration on ICRF absorption
376 Lin
1031209
1031210
1040107
1040108

1
2

78MHz


Investigate dependence of D(3He) minority heating and transition to mode conversion on 3He concentration, plasma temperature and density, and antenna phasing
390 Wukitch
1040504(1/2d)
1040505

2
1+1

50MHz

Mode Conversion Current Drive Experiments
356 Wukitch


3a
1+1

50MHz


Investigate MC poloidal flow drive at D(He3) Plasmas
378 Lin


3b
1+1

50MHz


Antenna Loading Characterization
350 Parisot
1031120

4 1
78 MHz


D, E, and J-port Antenna Evaluation and Comparison
High Power RF
326
Wukitch
1021029(1/2d)
1021107(1/2d)
1030528
1030605


?

70/80 MHz
78/80 MHz
-5.2?

High Power ICRF Experiment 379 Wukitch


?


78/80MHz


Influence of ICRF on sawtooth behavior 380 Wukitch
1040218
1040330

?


78/80MHz


ICRF Mode Conversion Poloidal Flow Drive
343A Lin
1030711
1040427(3/4d)


1

78/80MHz
1-4MW
-5.1,-7.3

Initial MCCD Experiments
345
Wukitch
1030710(1/2d)
1030716
1040427(3/4d)


1

3MW
-5.7,-8

Plasma performance optimization by impurity control 388 Lin
1040211
1040212(1/2d)







MHD

  R. Granetz (coordinator)
 
 
     
JET/C-Mod locked mode dimensionless comparison (ITPA) 361 Hender,Wolfe
1031219
1040408
1040413
1040429(1/2d)
1040430(1/2d)


1
ITPA



Active low frequency MHD 357 Snipes
1040305


1




C-Mod/DIII-D/Jet Comparison of Neoclassical Tearing Modes
LaHaye, Granetz



1
ITPA



Study of AE Damping Rate vs. Plasma Shape, Beta,and rotation 359 Fasoli/Snipes
1040209


1
ITPA?



Error field effects on Neoclassical Tearing Modes
Wolfe



1




Digital Plasma Control System Testing and Commissioning
Stillerman



1




TAE Damping in Alcator C-Mod ITB Discharges 366 Boswell



pb




Locked Mode Threshold in Upper Null Con-
figurations
386 Hutchinson
1040317
1040414(1/4d)
1040430(1/2d)




0


Dependence of locked mode thresholds on q95 387 Wolfe
1040210
x



0


Initial Active MHD TAE Experiments
316
Snipes
1021003
1021107(.5pb)
1030520

0
1

none
-3.5:-6

Plasma Initiation without commutation
329
Hutchinson
1030515

0
1+

none
-5.4

Disruption Mitigation with gas jets

Whyte, Granetz



(2004)
ITPA



Alfven Cascades
391 Porkolab,Snipes
1040406




78MHz














Burning Plasma Support

 

S. Wolfe (coordinator)


 
 
     
Operate with nearly balanced DN to evaluate global confinement and compare with existing SN and inner-limited database 377 Meade/Marmar
1031211
1031216(1/2d)
1031217

1
2+1




2MA Operation (8 tesla) 371 Granetz/Irby
1040401(1/2d)
1040405
1040428
x
2
1


-8

Further comparison of thresholds and pedestals with ASDEX Upgrade
Hubbard


3
1




Shaping and Control Development for high elongation, high I_N equilibria for ITER/FIRE relevant experiments 362 Wolfe
1031126
1040127(1/2d)

4
1
ITER



Approaching  Burning Plasma Conditions on C-Mod 358 Snipes


4
1




5.3 Tesla 'Demonstration Dicharges' at ITER-relevant beta and collisionality
Wolfe


5
1(backup)
ITER

-5.3












High Performance Operations at 5.0T
318
Marmar
1020903
1030529
1030611
1030617


1+

70/80 MHz
-5.0

FIRE-relevant DN assessment

Meade



1.5

78/80 MHz
-5.4?

Current Rise optimization

(combined with Hi-performance ohmic 8T plasma)
247b Snipes, Sugiyama.et al.
 
1.5

78/80MHz 

4-7MW

-5.4, 8T  











Advanced Tokamak

  S.Scott (coordinator)
 
 
     
Divertor Power Handling for AT Plasmas, combined with Extended
Pulse Length Operation at Moderate Density with Increased RF Power

Terry/Wolfe


1
1+1




ITB Behavior during Ip ramping + Re-establish good ITBs
Rice


2
1+1




MSE Calibration III 394 Yuh
1040422
1040504(1h)

3
1




Upper Divertor Pressures in AT Target Plasmas with Cryopump
Baffle.

Labombard


4
0-0.5




Large Volume ITBs at 2.8 Tesla with 50 MHz ICRF 370 Rice
1040506

5
1

50MHz


Plasma-Jog MSE Calibration
Scott


6
.5




ITB - Access Conditions and Hysteresis
305
Greenwald
1020828
1040324

7
1

70/80 MHz
-4.5?

Ip Ramp Experiments(combine
MP324,MP351,and Alfven cascades)

Porkolab


8
1




Power Absorption in ITBs
341
Fiore
1040309(3/4d)
1040315(1/2d)
1040316(1/2d)
1040323

9
1

70/80 MHz
-5.4 ?

Develop Low Density H-modes
Hubbard


10
1




High Bootstrap Fraction Regimes
307
Parker
1021101
1040325(3/4d)

11
1

70/80 MHz
-5.4

5.4 Tesla ITB with small BT ramps 309 Lynn


12 1
70MHz?


ITB Current Scan Revisited
373 Fiore
1040310

?

70MHz?


ITB Dependence on Triangularity
374 Fiore
1031202
1031212

?





H-mode fueling/pumping unbalanced DN
323
Labombard/ Whyte
1021002


1

78/80 MHz
-5.4

ITB Barrier location - Ip scan
301
Rice
1020823
1020827
1020925
1020927
1021001
1021010


1

78/80 MHz
-4.5?

ITB Barrier location - RF into ohmic ITB
299
Fiore
1020816
1020926


1

70/80 MHz
-4?












ITB threshold/trigger via Bt ramps
300
Rice, Lee
(greenwald)
1040311(1/2d)
1030318(1/4d)


1

78/80 MHz
?

High power off-axis ITB
303
Rice
1030610
1030702(1/2d)


0.5

78/80 MHz
-6.1

Density Control via Hi-power L-mode

Hubbard



0.5

78/80 MHz
-5.4

Current profile modification using Ip startup &
via Ip ramp after ITB formation
302
Porkolab

Rice



1.5

78/80 MHz
-4.5?

ITB Formation with 2 freq ICRF in Optimized shear plasmas with Ip ramp (startup)
324a
Porkolab
1021022
1021023
1021025
1040318(3/4d)


 1-2

70/80MHz
-4.5












ITB Study with Expanded Diagnostic Set
317
Fiore
1021011
1021018
1021024


1

70/80 MHz
-4.3: -6.3

Developing low ne EDA H-mode targets for LHCD
327
Hubbard
1021106
1030530


1 or 2

80MHz
-5.4












100% bootstrap fraction plasmas
344
Politzer,Perkins
1030702(1/2d)


3x1/2+1

80, 70/80 >4MW
-4:-7

q-profile control nd ELMy H-mode studies with Ip ramp and ICRF Heating
351
Porkolab
1030709


1

>4MW
-5.4,-4.5

J-profile modification by off-axis heating of PEP mode

Marmar



0.5

78/80 MHz
?

CNPA Testing and Calibration 389 Tang
1040213(pb)
1040415
1040429(1/2d)






x
Long pulse with High power RF

Wolfe



1

78/80 MHz


Access to Hybrid Scenario in C-Mod

Sips (IPP-Garching)


(2004)

ITPA



Basic Science



W. Rowan
/coordinator









Li Pellet Imaging

Brock Bose


1
1




CXRS Emission Crossections at High Plasma Density

Rowan, M.Valisa


2
1




Resolution of Discrepancies in Interpretation of Beam-Neutral Spectra

Rowan


3
pb




Operations












Initial tests of the Boron Injector
348
Irby, Rosati
1030715(pb)


1

none
any

Notes:

  1. Experiments shown in Green were submitted in FY03
Last Updated  6/16/2004

Please sent comments and corrections regarding this page to Steve Wolfe