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Abstract

The wave kinetic equation (WKE) describes the propagation and absorption of short wavelength modes and can be an effective method to treat multi-pass absorption and wave chaos, which is important in lower-hybrid current drive. In the WKE, action density (or energy density in a stationary medium) is convected along ray trajectories in the (k,x) phase space, where k is the wave vector and x the position vector. The cylindrical tokamak model, for which the exact wave equation is separable was considered first. For a mode launched at the plasma edge (with given poloidal and toroidal mode numbers), solutions of the WKE give the radial profile of the energy density and absorbed power. These were found to be in good agreement with numerical solutions obtained from a full wave code. In toroidal geometry, however, the poloidal number is not conserved and stochastic layers develop in ray phase space.

Additional information

Authors: KUPFER K, General Atomics, San Diego (US);MOREAU D, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);LITAUDON X, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Paper presented: 1993 International Sherwood Fusion Theory Conference, Newport, Rhode Island (US), March 28-31, 1993
Availability: Text not available
Record Number: 199310618 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en