Plasma Physics seminar

Date
Fri, Oct 20, 2017 3:30 pm - 4:30 pm
Location
Energy Research Facility, Room 1207

Description

Title : Quasilinear velocity diffusion in a tokamak
Speaker Name: Dr. Jungypo Lee
Speaker Institution : MIT
Abstract : RF waves are injected in a tokamak to heat plasmas or generate a plasma current. Addition to the main purposes, it can be a good tool to control some MHD and transport phenomena in the fusion reactor. In this talk, I will present the recently developed theory of the quasilinear velocity diffusion due to the RF waves. The quasilinear diffusion is used to describe the RF wave model in a kinetic theory. This talk has two parts. In the first part, I will
mention the modification of the Kennel Engelmann diffusion coefficients for the toroidal geometry. In the second part, the change of the radial electric field and ion toroidal rotation due to the quasilinear diffusion will be explored, as an application of the quasilinear theory.


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