Electron Bernstein Wave Research on CDXU and NSTX

1
Plans for Wave-Particle Experimental Task Group
DiscussionGary TaylorJoel Hosea
NSTX Research Forum December 5, 2006
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Plans for HHFW Research

• Continue RF edge studies investigating causes of
  parasitic absorption (FY07-08)
• Surface wave excitation damping parametric
  decay instability ion heating (3 RF probes for
  FY07)
• Current drive at high Bt
• Additional RF probes to measure waves in plasma
  periphery
• UCLA reflectometer upgrade to measure higher edge
  densities for RF studies
• HHFW antenna modification to launch directed
  spectra at 11 m-1 for improved CD (FY09)
• High power operation capable of heating Te 50eV
  plasma with 28 m-1

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Plans for EBW Research

• Test EBW coupling models for L H-mode plasmas
  (FY07)
• Experiments to understand poor coupling in
  H-modes
• Gas puffing to modify collisionality
• Add wide acceptance angle antenna
• Enhanced understanding through modeling
  collaboration (FY07-08)
• MAST collaboration 28GHz start-up/ramp-up (Jan
  2007)
• Include EBW mode conversion in GENRAY, optimize
  EBWCD scenarios CompX/MIT
• EBE simulation Prague IPP
• Implement 200kW 15.3-28GHz EBW system w/ ORNL
  gyrotrons (FY08)
• ECH pre-ionization ECH/EBWH for CHI PF-only
  start-up
• EBW coupling studies initial heating
  experiments

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Waves ET Discussion AgendaLSB 252 100 - 500
PM, Today

• 100 Introduction Agenda for the Discussion -
  G. Taylor
• 110 HHFW Power Balance Optimization at High Bt -
  J. Hosea
• 125 HHFW Current Drive at High Bt - J. Hosea
• 140 Proposed HHFW Antenna Feed Changes - P. Ryan
• 145 Absorption of HHFW on Beam Ions - R. Pinsker
• 200 CAE/GAE Stochastic Heating AE Excitation
  - E. Fredrickson
• 215 Effect of HHFW on 'Angelfish' Chirping - B.
  Heidbrink
• 230 Analysis of ICRH-Driven Rotation in NSTX
  with XGC-RF Code - J. Kwon
• 245 -Break-
• 255 EBW Coupling at 8-40 GHz for L- H-Mode
  Plasmas - S. Diem
• 325 Strategy Priorities for 2007 Run
  (Discussion)