Quasi-linear analysis of the extraordinary electron wave destabilized by runaway electrons
Artikel i vetenskaplig tidskrift, 2014

Runaway electrons with strongly anisotropic distributions present in post-disruption tokamak plasmas can destabilize the extraordinary electron (EXEL) wave. The present work investigates the dynamics of the quasi-linear evolution of the EXEL instability for a range of different plasma parameters using a model runaway distribution function valid for highly relativistic runaway electron beams produced primarily by the avalanche process. Simulations show a rapid pitch-angle scattering of the runaway electrons in the high energy tail on the 100–1000 μs time scale. Due to the wave-particle interaction, a modification to the synchrotron radiation spectrum emitted by the runaway electron population is foreseen, exposing a possible experimental detection method for such an interaction.

Författare

Gergö Pokol

Budapesti Muszaki es Gazdasagtudomanyi Egyetem

A Kómár

Budapesti Muszaki es Gazdasagtudomanyi Egyetem

Adam Budai

Budapesti Muszaki es Gazdasagtudomanyi Egyetem

Adam Stahl

Chalmers, Teknisk fysik, Nukleär teknik

Tünde Fülöp

Chalmers, Teknisk fysik, Nukleär teknik

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 21 102503- 102503

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Fundament

Grundläggande vetenskaper

Ämneskategorier

Fusion, plasma och rymdfysik

DOI

10.1063/1.4895513