Non-Maxwellian electron distributions in time-dependent simulations of low-Z materials illuminated by a high-intensity X-ray laser

García de La Varga, Alberto and Velarde Mayol, Pedro and Gaufridy, François de and Portillo Garcia, David and Cotelo Ferreiro, Manuel and Barbas, A. and González Fernández, Agustín and Zeitoun, Philippe (2013). Non-Maxwellian electron distributions in time-dependent simulations of low-Z materials illuminated by a high-intensity X-ray laser. "High Energy Density Physics", v. 9 (n. 3); pp. 542-547. ISSN 1574-1818. https://doi.org/10.1016/j.hedp.2013.05.010.

Description

Title: Non-Maxwellian electron distributions in time-dependent simulations of low-Z materials illuminated by a high-intensity X-ray laser
Author/s:
  • García de La Varga, Alberto
  • Velarde Mayol, Pedro
  • Gaufridy, François de
  • Portillo Garcia, David
  • Cotelo Ferreiro, Manuel
  • Barbas, A.
  • González Fernández, Agustín
  • Zeitoun, Philippe
Item Type: Article
Título de Revista/Publicación: High Energy Density Physics
Date: September 2013
ISSN: 1574-1818
Volume: 9
Subjects:
Freetext Keywords: Non-Maxwellian electron distribution; Non-LTE; Time-dependent atomic kinetics
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The interaction of high intensity X-ray lasers with matter is modeled. A collisional-radiative timedependent module is implemented to study radiation transport in matter from ultrashort and ultraintense X-ray bursts. Inverse bremsstrahlung absorption by free electrons, electron conduction or hydrodynamic effects are not considered. The collisional-radiative system is coupled with the electron distribution evolution treated with a Fokker-Planck approach with additional inelastic terms. The model includes spontaneous emission, resonant photoabsorption, collisional excitation and de-excitation, radiative recombination, photoionization, collisional ionization, three-body recombination, autoionization and dielectronic capture. It is found that for high densities, but still below solid, collisions play an important role and thermalization times are not short enough to ensure a thermal electron distribution. At these densities Maxwellian and non-Maxwellian electron distribution models yield substantial differences in collisional rates, modifying the atomic population dynamics.

More information

Item ID: 25701
DC Identifier: http://oa.upm.es/25701/
OAI Identifier: oai:oa.upm.es:25701
DOI: 10.1016/j.hedp.2013.05.010
Official URL: http://www.sciencedirect.com/science/article/pii/S1574181813000712
Deposited by: Memoria Investigacion
Deposited on: 05 May 2014 18:53
Last Modified: 01 Oct 2015 22:56
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