Author: Viktorov, M.
Paper Title Page
WEOBMH04
 Theory of Cyclotron Instability of Hot Electrons in ECRIS: Origin, Manifestation, and Influence on Plasma Confinement  
 
  • D. Mansfeld, I. Izotov, V. Skalyga, M. Viktorov
    IAP/RAS, Nizhny Novgorod, Russia
  • O.A. Tarvainen
    JYFL, Jyväskylä, Finland
  
  Interaction between electromagnetic waves and particles in magnetoactive plasma under cyclotron resonance conditions can result in the growth of cyclotron instabilities of various kinds. Electron cyclotron instability (ECI) is a kinetic type instability, which is driven by the anisotropy of the energetic electrons distribution function traps with the transverse kinetic energy relative to the magnetic field dominating over the longitudinal one. One of the most interesting manifestations of ECI is the generation of bursts of electromagnetic radiation accompanied by hot electron precipitations from the trap. Such phenomena are observed in a wide range of plasma parameters: in the magnetospheres of the Earth and planets, in solar coronal loops, and in laboratory magnetic traps. Recently ECI were experimentally observed in ECR ion sources and it was shown that bursts of hot electrons escaping from the trap can destruct plasma confinement affecting highly charged ions beams current [1]. In this report we discuss basic mechanisms of cyclotron instability growth in non-equilibrium plasma of ECR discharge, main features of instability manifestation and its influence on ECRIS parameters.
* O Tarvainen et al 2014 Plasma Sources Sci. Technol. 23 025020 		 
slides icon Slides WEOBMH04 [1.123 MB]