Lithium ion beam experiments on PBFA II

Abstract

We present the results of particle-in-cell numerical simulations of one-dimensional, time dependent, fully relativistic double layers. We extend the scaling law for the layor width to relativistic potential drops and plasma temperatures. We also discuss quantitatively the layer creation and disruption cyclcs, as well as the beam-plasma instabilities driven by the layer. Relativistic double layers may be a mechanism to produce inknse radiation as observed in active galactic nuclei and pulsars, primarily by collective bremsstrahlung involving the charge-bunched electron beam and background plasma electrons. We will discuss the radiation spectrum and total power emitted by this process based on the degree of beam-plasma bunching observed by the numerical simulations. Tuesday Morning, 23 nay 1989 Poster Session 3P12-18: DIODES; ION, ELECTRON AND PLASMA SOURCES-I1