Self-similar motion of laser half-space plasmas. I. Deflagration regime

Sanmartín Losada, Juan Ramón and Barrero, A. (1978). Self-similar motion of laser half-space plasmas. I. Deflagration regime. "The Physics of Fluids", v. 21 ; pp. 1957-1966. ISSN 0031-9171.

Description

Title: Self-similar motion of laser half-space plasmas. I. Deflagration regime
Author/s:
  • Sanmartín Losada, Juan Ramón
  • Barrero, A.
Item Type: Article
Título de Revista/Publicación: The Physics of Fluids
Date: 1978
ISSN: 0031-9171
Volume: 21
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The one-dimensional self-similar motion of an initially cold, half-space plasma of electron density 0,produced by the (anomalous) absorption of a laser pulse of irradiation <j> = (j>0f/T(0< (< T) at the critical density nc(«c/«0=e<l), is considered. The analysis allows for electron heat conduction and ion-electron energy exchange and retains three dimensionless numbers: e, Zt (ion charge number), and a = (9/c/4m,) (T/C 2n l/4>oKe)213, where k, m, are Boltzmann's constant and the ion mass, and Ke X (electron temperature)5'2 = heat conductivity. If a >e- 4 ' 3 , a deflagration wave separates an isentropic compression with a shock bounding the undisturbed plasma, and an isentropic expansion flow to the vacuum. The structures of these three regions are completely determined; in particular, the Chapman-Jouguet condition is proved and the density behind the deflagration is found. The deflagration-compression thickness ratio is large (small) for a^e- 5 ' 3(a>e- 5 ' 3 ) . The compression to expansion ratio for both energy and thickness is 0(e"2). For Z,- large, a deflagration exists even if a~e~413. Condition a>e~4'3 may be applied to pulses that are not linear.

More information

Item ID: 21384
DC Identifier: http://oa.upm.es/21384/
OAI Identifier: oai:oa.upm.es:21384
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 19 Oct 2013 05:05
Last Modified: 21 Apr 2016 11:58
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