Distinctive features of photoionized plasma from short x-ray-pulse interaction with gaseous medium
- 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)
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.
- OSTI ID:
- 20782464
- Journal Information:
- Physics of Plasmas, Vol. 13, Issue 1; Other Information: DOI: 10.1063/1.2150429; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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