Parametric Instabilities of Electron Cyclotron Waves in Plasmas.

Abstract

We have studied the parametric instabilities of electron cyclotron waves in the Elmo Bumpy Torus (EBT) ring and the large tokamaks eg. PLT. In the EBT, the electron cyclotron pump of finite wavenumber k sub o decays into two Bernstein modes at the second harmonic cyclotron layer and can account for the heating of the ring in the intitial phase. The coupling coefficient for this decay vanishes for a dipole pump, whereas the convective threshold with finite k sub o is about 200 W/sq cm. For large tokamaks, the convective threshold for various decay channels turns out to be about or > 200 KW/sq cm at 3mm wavelength. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1980
Accession Number
ADA087742

Entities

People

  • C. S. Liu
  • V. K. Tripathi

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplification
  • Bessel Functions
  • Couplings
  • Cyclotron Waves
  • Cyclotrons
  • Dispersion Relations
  • Dispersions
  • Electrons
  • Equations
  • Frequency
  • Group Velocity
  • Instability
  • Long Wavelengths
  • Magnetic Fields
  • Maryland
  • Parametric Instability
  • Phase Velocity

Fields of Study

  • Physics

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Microelectronics