Parametric Lower-Hybrid Instability Driven by Modulated Electron-Beam Injection

G. R. Allen; D. K. Owens; S. W. Seiler; M. Yamada; H. Ikezi; M. Porkolab

doi:10.1103/PhysRevLett.41.1045

Parametric Lower-Hybrid Instability Driven by Modulated Electron-Beam Injection

G. R. Allen, D. K. Owens, S. W. Seiler, M. Yamada, H. Ikezi, and M. Porkolab

Phys. Rev. Lett. 41, 1045 – Published 9 October 1978

Abstract

A modulated electron beam is injected into a low- $β$ plasma parallel to the confining field to investigate the energy-transfer rate from the electron beam to the plasma. Parametric excitation of electrostatic lower-hybrid waves and ion-cyclotron quasimodes is experimentally identified. The temperature of both ions and electrons is observed to increase significantly concomitant with the growth of the instability.