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Title: Distinctive features of photoionized plasma from short x-ray-pulse interaction with gaseous medium

The study of a photoionized plasma created through the interaction of a short linearly polarized x-ray pulse with a gaseous medium is presented in the context of the future design of experiments involving femtosecond free-electron laser pulses. The dispersion properties and instabilities of such x-ray-produced plasma are studied. It is shown that a two-stream type of instability can be obtained with a growth rate comparable to the plasma frequency. This is expected to have a dramatic effect on the evolution of an x-ray laser-produced plasma. A model for describing electromagnetic-field generation and emission resulting from the interaction of a short x-ray laser pulse with a gas jet is proposed. Issues addressed include the effect of the thermal electromotive force at the edge of a plasma driven by the anisotropic electron energy distribution that arises from the photoionization of a gas. Terahertz pulse emission from these photoionized plasma is also predicted.
Authors:
; ; ; ;  [1] ;  [2] ;  [2]
  1. Theoretical Physics Institute, University of Alberta, Edmonton T6G 2J1, Alberta (Canada) and P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991 (Russian Federation)
  2. (Canada)
Publication Date:
OSTI Identifier:
20782464
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 1; Other Information: DOI: 10.1063/1.2150429; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; BOUNDARY LAYERS; CHARGED-PARTICLE TRANSPORT; ELECTROMAGNETIC FIELDS; ELECTROMOTIVE FORCE; ELECTRONS; EMISSION; ENERGY SPECTRA; FREE ELECTRON LASERS; LANGMUIR FREQUENCY; PHOTOIONIZATION; PLASMA; PLASMA DIAGNOSTICS; PLASMA INSTABILITY; PLASMA JETS; PLASMA PRODUCTION; PULSES; X RADIATION; X-RAY LASERS