A new approach to kinetic full wave analysis in plasmas

Atsushi Fukuyama

Kyoto University

Friday, March 3, 2017

3:00pm

NW17-218

PSFC Seminars

Abstract: In a homogeneous plasma, the behavior of a plane wave with a frequency and a wave number is described by a dispersion relation including the response of a plasma, the dielectric tensor. The kinetic response of a plasma with a finite temperature is usually expressed in terms of the plasma dispersion function. In an inhomogeneous plasma, a convolution integral in wave number space leads to the coupling of modes with different wave number and requires large computational resources for full wave analysis. An alternative approach is to introduce an integral form of the dielectric tensor derived by integrating the perturbed distribution function over velocity space. We apply this approach to three examples. The first is the resonant laser plasma interaction in unmagnetized nonuniform hot plasmas. The second example is the cyclotron damping by magnetic beach heating and the third is  finite a gyroradius effect. Finally, we discuss two-dimensional kinetic full wave analysis, and quasi-linear velocity diffusion.

Bio:

Professor, Department of Nuclear Engineering, Graduate School of Engineering, Kyoto University.
Graduated from Department of Electronics, Kyoto University in 1974; MC in 1976; PhD in 1980.  
Research and education at Okayama University from 1977 to 1998, at Kyoto University from 1998 until now.  
Research subject: wave physics and modelling in plasmas, transport modelling in toroidal plasmas,integrated simulation of magnetic fusion plasmas.