Alcator C-Mod 2004 Ideas Forum

September 10-12, 2003

Agenda

Wednesday, September 10 Session #1: Advanced Tokamak Physics, Internal Transport Barriers, Transport

Session #2: Edge Turbulence, Edge Fueling, Edge Flows, Impurities

Session #3: Transport - Similarity Expts., Rotation, H-mode

Session #4: Transport - H-mode Edge, long pulse DNB - and AT Physics -MSE

Thursday, September 11 Session #5: Burning Plasma Support and Basic Science

Session #6: Transport and the DNB

Session #7: RF Physics

Session #8: MHD Physics and Operation Issues

Friday, September 12

Session #9: Task Force Summaries and Discussion


9/10/03 - 9:15 am
Welcome
Jim Terry

9/10/03 Session 1   Advanced Tokamak Physics, ITBs, Transport   
       
9:15-11:00   Session Chair: Steve Wolfe  
Presenter First Author Topic Time
N. Basse  N. Basse Interplay between confinement, turbulence and magnetic topology 9:30
G. Sips G. Sips (IPP-Garching) (Access to) the Hybrid scenario in C-Mod 9:37
B. LaBombard B. LaBombard Upper divertor pressures in AT target plasmas with cryopump baffle 9:44
J. Terry J. Terry Divertor Power Handling for LSN, DN, and AT Plasmas 9:51
P. Bonoli P. Bonoli Measurements of Current Profile Modification Due to Driven LH Waves in Alcator C-Mod 9:58
P. Bonoli P. Bonoli Parametric Studies of LH Current Profile Modification in Alcator C-Mod: Comparisons Between Simulation and Experiment 10:05
A. Hubbard
A. Hubbard
Influence of j(r) on ITBs 10:12
D. Ernst D. Ernst Feedback control of ITB's 10:19
J. Rice J. Rice Large Volume ITBs at 2.8 T with 50 MHz ICRF 10:26
N. Basse
N. Basse
Core turbulence studies in ITB plasmas
10:33
J. Terry J. Terry Further Studies of the QC mode 10:40
S. Scott
S. Scott (PPPL)
Transient Momentum Transport Studies with Pellet Injection
10:47
M. Porkolab
M. Porkolab
AT Target Plasma Studies: Alfven Wave Cascades and Evolution of Reversed Shear Discharges During ICRF Heated Current Ramp Experiments
10:54




    Coffee Break (10 Minutes) 11:01
       
9/10/03 Session 2   Edge Turbulence, Edge Fueling, Edge Flows, Impurities  
11:10 - 12:35   Session Chair: D. Mossessian  
Presenter First Author Topic Time
S. Zweben S. Zweben (PPPL)
Gas puff imaging with 312 frame PSI camera (density limit, small Li pellet, limiter plasmas) 11:11
S. Zweben S. Zweben (PPPL) Parallel Velocity Fluctuations in SOL 11:18
LaBombard, B. LaBombard, B. Edge plasma flow experiments in upper/lower x-point geometries 11:25
Terry, J. Terry, J. Piggyback Experiments in Edge Turbulence using 312 frame-1MHz camera 11:32
Terry, J. Terry, J. "Neutral Wind" effect on radial motion of blobs 11:39
Lipschultz, B. Lipschultz, B. Measurement of core impurity levels using CXRS 11:46
W.L. Rowan M. Valisa
Search for CX lines from partially stripped ions for Edge/Sol characterization 11:53
J. Terry J. Terry Preliminary study of edge impurity penetration via "holes" 12:00
Lipschultz, B. D. Whyte (U. Wisc) Measurement of wall pumping rate and mechanism on Alcator C-Mod 12:07
J. Terry G. Wurden (LANL) Infrared spectroscopy of the divertor region 12:14
B. Lipschultz
B. Lipschultz
Why is there Enhanced Screening of Impurities at the Inner Wall
12:21
R. Granetz
R. Granetz
Detection of dust particles using Mie scattering of laser light
12:28
       
  12:35 - 13:45     Lunch (not provided) 12:35
       
9/10/03 Session 3
 Transport - Similarity Expts., Rotation, H-mode  
13:45 - 15:15
 Session Chair: B. LaBombard  
Presenter First Author  Topic Time
 D. Mossessian  C. Petty (GA) Similarity Comparisons Between C-Mod, DIII-D, and JET at Fixed NU* or Fixed Greenwald Density Fraction 13:45
 A. Leonard (GA)  A. Leonard (GA) Some ELM experiments for Alcator C-Mod 13:52
 A. Hubbard  A. Hubbard Edge Parameters at L-H thresholds in LSN, DN and USN plasmas 13:59
 J. Rice  J. Rice Rotation and H-mode Power Thresholds in LSN, DN, USN and Limited Configurations 14:06
 A.Hubbard  A.Hubbard Further comparison of thresholds and pedestals with ASDEX Upgrade 14:13
 A.Hubbard  A.Hubbard Comparison of EDA H-mode with HRS H-Mode on JFT-2M 14:20
 P. Catto  P. Catto Toroidal Rotation via Neutral Viscosity 14:27
 D. Ernst
 D. Ernst Intrinsic rotation in C-Mod plasmas 14:33
 W.L. Rowan  W.L. Rowan Ion temperature and rotation at the top of the EDA H-Mode pedestal 14:40
 J. Rice
M. May (LLNL)
Edge Toroidal Rotation Measurements with Fast Time Resolution
14:47
 W.L. Rowan  M. Valisa (RFX) Evaluate impurity transport coefficients and flow at the edge of an EDA H-Mode plasma 14:54
 W.L. Rowan  M. Valisa (RFX) Evaluate the effect of D2 puffing on impurity transport at the edge 15:01
 J. Rice  R. Dux (IPP-Garching) Relation of Impurity Transport and Main Ion Transport in Discharges with Density Peaking 15:08
       
  
 Coffee Break (10 Minutes) 15:15
       
9/10/03 Session 4
 Transport - H-mode Edge, long pulse DNB - and AT Physics - MSE   
15:25 - 17:00
 Session Chair:  W.L. Rowan  
Presenter First Author  Topic Time
J. Hughes
J. Hughes
Experimental Measurement of Neutral Penetration in H-mode Plasmas
15:25
D. Mossessian
D. Mossessian
Measurements of poloidal distribution of neutral sources at the edge with a series of D-alpha arrays
15:32
D. Mossessian
D. Mossessian
Mapping H-mode regime boundaries in local edge parameter space
15:39
M. Porkolab
W. Nevins (LLNL)
Nonlinear Mode Coupling in Saturated QC Spectrum: Search with the  PCI Diagnostic
15:46
A. Hubbard
B Carreras (ORNL)
Variation of Important Dimensionless Parameters Controlling L-H Dynamics
15:53
D. Mossessian
D. Mossessian
Evaluation of edge MHD stability based on CXRS and MSE data and access to type I ELMy regime on C-Mod
16:00
R. Granetz
R. Granetz
Plasma heating and confinement using the long-pulse, modulated DNB
16:07
R. Granetz
R. Granetz
Energetic deuteron confinement using the long-pulse, modulated DNB
16:14
L. Lin
L. Lin
Search for Short Wavelength ETG Modes and Streamers with the PCI Diagnostic
16:21
S. Scott
S. Scott
Plasma-Jog MSE calibration 16:28
S. Scott
S. Scott
MSE Measurement using Helium 16:35
H. Yuh
H. Yuh
MSE Calibration III 16:42


 


 Adjourn for day 16:49
       
9/11/03 Session 5
 Burning Plasma Support, Basic Science  
 9:30 - 10:30
 Session Chair: S. Wukitch  
Presenter First Author  Topic Time
E. Marmar E. Marmar
Operate with nearly balanced double-null to evaluate global confinement and compare with existing single-null and inner-wall-limited database 9:30
S. Wolfe S. Wolfe
Shaping and Control development for high elongation, high I_n equilibria for ITER/FIRE-relevant experiments 9:37
S. Wolfe
S. Wolfe
5.3 Tesla 'Demonstration Discharges' at ITER-relevant beta and collisionality 9:44
J. Snipes
J. Snipes
Approaching Burning Plasma Conditions on C-Mod
9:51
D. Meade
D. Meade (PPPL)
Assess Potential of a Double Null Configuration for Next Step Burning Plasma Experiment
9:58
W.L. Rowan W.L. Rowan
CXRS emission cross sections at high plasma density 10:05
W.L. Rowan W.L. Rowan
Resolution of discrepancies in interpretation of beam-neutral spectra 10:12
B. Brock
B. Brock
Improved Li pellet imaging 10:19


 
  
 Coffee Break (10 Minutes) 10:26
       
9/11/03 Session 6
 Transport and the DNB (continued)  
 10:45 - 11:55
 Session Chair: R. Granetz  
Presenter First Author  Topic Time
P. Phillips P. Phillips
Electron temperature scale lengths during ITBs 10:38
A. Lynn A. Lynn
ECE measurement of density fluctuations:  sensitivity to density gradients 10:45
W. Horton 
W. Horton (UTx)
Confinement with Fast Current Ramping in High Field Tokamaks as a Path to Ignition
10:52
W.L. Rowan
R. Bravenec
Gyrokinetic Simulations Utilizing CXRS and MSE data 10:59
W.L. Rowan W.L. Rowan
Local measurement of the deuteron density in C-Mod 11:06
M. Sampsell M. Sampsell
Core fluctuation studies 11:13
M. Sampsell M. Sampsell
Ohmic EDA Studies Using the A-Coil 11:20
W.L. Rowan M. Valisa (RFX)
Evaluate the beam composition at several energies to find the most efficient operating point for the DNB diagnostics 11:27
W.L. Rowan
M. Valisa (RFX)
Evaluate beam composition at different distances from the residual-ion deflector 11:34
W.L. Rowan M. Valisa (RFX)
Evaluate beam divergence for the three beam energy species 11:41
M. Greenwald
M. Greenwald
Test theories for anomalous particle transport in the absence of particle source or Ware pinch 11:48
 M. Greenwald M. Greenwald  Obtain low (normalized) density H-modes by current ramping 11:55




    
 Lunch (not provided) 11:55
       
9/11/03 Session 7
 RF Physics  
 13:30 - 15:08
 Session Chair: S. Scott  
Presenter First Author  Topic Time
S. Bernabei
S. Bernabei (PPPL)
Commissioning of the LHCD system: coupling vs. phase, vs. coupler position and vs. density gradient
13:30
M. Greenwald
M. Greenwald
Test role of ne and Te on RF power absorption 13:37
Y. Lin
Y. Lin
Controlled Experiments on the influence of ne, Te, RF power density and H concentration on ICRF absorption in both D(H) and He4(H) plasmas 13:44
S. Wukitch
S. Wukitch
Assess MCCD using D(3He) and application to sawtooth stabilization and high li operation 13:51
Y. Lin
Y. Lin
Investigate MC poloidal flow drive at D(He3) plasmas using J-port antenna at 50 MHz 13:58
S. Wukitch
S. Wukitch
Investigate influence of antenna phasing on sawtooth behavior in minority heating scenario during current ramp and flat-top 14:05
S. Zweben
S. Zweben (PPPL)
Edge minority heating (MP330...cont...) 14:12
T. Biewer
T. Biewer (PPPL)
Investigation of RF heating of the edge plasma
14:19
V. Tang
V. Tang
Characterization of Alcator C-Mod ICRF Minority Tails via Neutral Particle Detection 14:26
S. Zweben
S. Zweben (PPPL)
RF beatwaves at the plasma edge 14:33
S. Wukitch
S. Wukitch
Investigate Dependence of D(3He) minority heating and transition to mode conversion on 3He concentration, Te, ne, and phasing 14:40
M. Porkolab
M. Porkolab
Investigate role of IBW and ICW in D(H), D(3He), and H(3He) ICRF mode conversion using PCI
14:47
A. Parisot
A. Parisot
Initial test of a load tolerant ICRF matching network on E-Antenna 14:54
S. Wukitch
S. Wukitch
Evaluate Antenna Operation without Faraday Screen  15:01
       
  
 Coffee Break (10 Minutes) 15:08
       
9/11/03 Session 8


 MHD Physics and Operations Issues  
 15:25 - 16:45
 Session Chair: W. Rowan  
Presenter First Author  Topic Time
J. Snipes
C. Boswell
TAE Damping in Alcator C-Mod ITB Discharges 15:20
R. Granetz
R. Granetz
Modifying tearing mode stability by application of LHCD at resonant surfaces.
15:27
J. Snipes
J. Snipes
Real-time TAE Frequency Feedback 15:34
J. Snipes
J. Snipes
Active Low Frequency MHD  15:41
R. Granetz
D. Whyte (U. Wisc)
Disruption mitigation using a high-pressure gas jet 15:48
J. Snipes
A. Fasoli (CRPP)
Study of AE Damping Rate vs. Plasma Shape, Beta, and rotation
15:55
S. Wolfe
S. Wolfe
Error field effects on Neoclassical Tearing Modes
16:02
J. Snipes
A. Fasoli (CRPP)
Active Excitation of Alfven Cascades
16:09
J. Snipes
J. Snipes
Alfven Cascades in the Current Rise  16:16
J. Snipes
A. Fasoli (CRPP)
Measurement of ICRH drive of AEs During Active Excitation
16:23
J. Stillerman
J. Stillerman
Digital Plasma Control System Testing and Commissioning 16:30
D. Schissel
D. Schissel (GA)
Enhanced Capabilities for Actively Participating in C-Mod and DIII-D 16:37


 


 Adjourn for day 16:44


 
9/12/03 Session 9

  Forum Summaries and Discussion
9:30 - 10:30

 Session Chair: J. Terry


 Topic Time
 S. Scott

  9:30
 S. Wolfe   Burning Plasma Support Task Force Summary 9:35
D. Mossessian

Transport Task Force Summary
9:40
R. Granetz

MHD Task Force Summary
9:45
S. Wukitch

RF Task Force Summary
9:50
B. LaBombard

Edge/Divertor Task Force Summary
9:55
W.L. Rowan

Basic Science Task Force Summay
10:00
 J. Terry

Charge to Task Forces and Discussion about Forum Structure
10:05






Adjourn Forum
 10:30

 


Agenda

Session #1: Advanced Tokamak Physics, Internal Transport Barriers, Transport

Session #2: Edge Turbulence, Edge Fueling, Edge Flows, Impurities

Session #3: Transport - Similarity Expts., Rotation, H-mode

Session #4: Transport - H-mode Edge, long pulse DNB - and AT Physics -MSE

Session #5: Burning Plasma Support and Basic Science

Session #6: Transport and the DNB

Session #7: RF Physics

Session #8: MHD Physics and Operation Issues


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This page last updated  9/5/03 by Jim Terry