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Proceedings Paper

Imagery Of Laser Imploded Targets In The X-Ray Domain
Author(s): J. Launspach; C. Bayer; D. Billon; M. Decroisette; D. Juraszek; D. Meynial
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Paper Abstract

In laser implosion studies, the data collected from X-ray radiation of the target itself provide information on density and temperature as well as on the implosion mechanism. The radiography of the imploding target with an external X-ray source is a diagnostic tool who can complete or replace this more conventional technique, particularly to analyze the relatively cold and dense core of a target imploded in the ablative scheme. In the introduction we present the experimental device currently used at Limeil and we recall the main phenomena and mechanisms involved in implosion of spherical target by intense lasers. The main characteristics of the laser bear facilities OCTAL are given : λ = 1.06 μm Eight beams with a total power of : 1 TW - 50 ps (E = 50 J) 500 GW - 600 ps (E = 300 J) The targets are glass spherical microballoons with radius from 30 to 150 pm and thickness from .6 to 3 μm. Targets are pressurized until few tens of bars with an equimolecular compo-sition of D-T. With some results obtained in typical experiments we discuss the different possibilities of imagery in the X-ray domain : . Imagery by emission of the target . Radiography of the target with an external X-Ray source obtained by a laser beam (backliahting) . A device is described who combine these two possibilities used simultaneously in the same experiment. . Imagery by self-emission or backlighting with time resolution. Some results are given which are in agreement with numerical modelization.

Paper Details

Date Published: 9 August 1983
PDF: 9 pages
Proc. SPIE 0312, 1st European Conf on Cineradiography with Photons or Particles, (9 August 1983); doi: 10.1117/12.932919
Show Author Affiliations
J. Launspach, Centre d'Etudes de Limeil (France)
C. Bayer, Centre d'Etudes de Limeil (France)
D. Billon, Centre d'Etudes de Limeil (France)
M. Decroisette, Centre d'Etudes de Limeil (France)
D. Juraszek, Centre d'Etudes de Limeil (France)
D. Meynial, Centre d'Etudes de Limeil (France)

Published in SPIE Proceedings Vol. 0312:
1st European Conf on Cineradiography with Photons or Particles
Jacques J. Marilleau, Editor(s)

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