Experimental test of the quasilinear theory of the interaction between a weak warm electron beam and a spectrum of waves

Journal Article · Mon Mar 16 04:00:00 EST 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.58.1112· OSTI ID:6919072

Tsunoda, S I; Doveil, F; Malmberg, J H

Recent theoretical work has suggested that the quasilinear description of the weak-warm-beam--plasma instability is incomplete. It has been argued that beam-mediated mode-coupling effects neglected in standard quasilinear theory play an important role, and that their average effect is a zeroth-order increase in the growth rate. We have experimentally observed strong mode-coupling effects when a weak warm beam interacts with waves on a slow wave structure. However, when we average the effects of the mode coupling we do not observe the predicted zeroth-order increase in the growth rate.

• Research Organization: Department of Physics, University of California, San Diego, La Jolla, California 92093
• OSTI ID: 6919072
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 58:11; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
BEAMS
ELECTRON BEAMS
ENERGY
INSTABILITY
INSTABILITY GROWTH RATES
INTERACTIONS
KINETIC ENERGY
LEPTON BEAMS
OSCILLATIONS
PARTICLE BEAMS
PLASMA
PLASMA INSTABILITY
TURBULENCE