Full wave effects on the lower hybrid wave spectrum and driven current profile in tokamak plasmas

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3609835· OSTI ID:22043372

Shiraiwa, S; Ko, J; Meneghini, O; Parker, R; Schmidt, A E; Greenwald, M; Hubbard, A E; Hughes, J; Ma, Y; Podpaly, Y; Rice, J E; Wallace, G; Wolfe, S M; Scott, S; Wilson, J R ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton University, Princeton New Jersey 08543 (United States)

A numerical modeling of current profile modification by lower hybrid current drive (LHCD) using a fullwave/Fokker-Planck simulation code is presented. A MHD stable LHCD discharge on Alcator C-Mod was analyzed, and the current profile from full wave simulations was found to show better agreement with the experiment than a ray-tracing code. Comparison of full wave and ray-tracing simulation shows that, although ray-tracing can reproduce the stochastic wave spectrum broadening, the full wave calculation predicts even wider spectrum broadening, and the wave spectrum fills all of the kinematically allowed domain. This is the first demonstration of LHCD current profile modeling using a full wave simulation code in a multi-pass absorption regime, showing the clear impact of full wave effects on the LHCD driven current profile.

• OSTI ID: 22043372
• Journal Information: Physics of Plasmas, Vol. 18, Issue 8; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
ALCATOR DEVICE
CONFINEMENT
FOKKER-PLANCK EQUATION
LOWER HYBRID CURRENT DRIVE
LOWER HYBRID HEATING
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA SIMULATION
PLASMA WAVES
SPECTRA
STOCHASTIC PROCESSES