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; Velarde Mayol, Pedro; Gaufridy, François de; Portillo Garcia, David; Cotelo Ferreiro, Manuel; Barbas, A.; González Fernández, Agustín y 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.

Descripción

Título: Non-Maxwellian electron distributions in time-dependent simulations of low-Z materials illuminated by a high-intensity X-ray laser
Autor/es:
  • García de La Varga, Alberto
  • Velarde Mayol, Pedro
  • Gaufridy, François de
  • Portillo Garcia, David
  • Cotelo Ferreiro, Manuel
  • Barbas, A.
  • González Fernández, Agustín
  • Zeitoun, Philippe
Tipo de Documento: Artículo
Título de Revista/Publicación: High Energy Density Physics
Fecha: Septiembre 2013
Volumen: 9
Materias:
Palabras Clave Informales: Non-Maxwellian electron distribution; Non-LTE; Time-dependent atomic kinetics
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería Nuclear [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 25701
Identificador DC: http://oa.upm.es/25701/
Identificador OAI: oai:oa.upm.es:25701
Identificador DOI: 10.1016/j.hedp.2013.05.010
URL Oficial: http://www.sciencedirect.com/science/article/pii/S1574181813000712
Depositado por: Memoria Investigacion
Depositado el: 05 May 2014 18:53
Ultima Modificación: 01 Oct 2015 22:56
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