Accession Number : ADA329230

Title :   Propagation and Stability of Intense Laser Pulses in Partially-Stripped Plasmas.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC BEAM PHYSICS BRANCH

Personal Author(s) : Sprangle, P. ; Esarey, E. ; Hafizi, B.

PDF Url : ADA329230

Report Date : 21 JUL 1997

Pagination or Media Count : 62

Abstract : The propagation and stability of intense laser pulses in a partially-stripped plasma, i.e., in the presence of free and bound electrons, is analyzed. The presence of bound electrons is shown to significantly alter the propagation and stability of intense laser pulses. The bound electrons are represented by a linear and nonlinear susceptibility, while the free electrons, which can support plasma waves, are treated nonlinearly. In the presence of both free and bound electrons, an atomic modulation instability develops that can have a growth rate substantially higher than either the conventional relativistic modulational instability or the forward Raman instability. Bound electrons can also greatly enhance the filamentation instability. The backward Raman instability, however, is unaffected by bound electrons.

Descriptors :   *PLASMAS(PHYSICS), *PULSED LASERS, FREE ELECTRONS, GROUP VELOCITY, MODULATION, INSTABILITY, RAMAN SPECTRA, PLASMA WAVES.

Subject Categories : Lasers and Masers
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE