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Proceedings Paper

Computational study of x-ray radiation effects on hydrodynamic instability
Author(s): Naofumi Ohnishi; Hideo Nagatomo; Hideaki Takabe; Hiroaki Nishimura; Masaharu Nishikino; Hiroyuki Shiraga; Tatsuhiko Yamanaka
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Paper Abstract

The initial imprint of density perturbation due to spatial nonuniformity of laser intensity is one of the most important issues in laser fusion research. Several imprint mitigation scheme by means of soft x-ray radiation have been proposed to reduce the induced perturbation through the thermal conduction region. One of the schemes uses an external x-ray source prior to laser incidence to produce preformed plasma. Another has a low-density foam layer and high-Z material to heat the foam radiatively and make it uniform. We present the dynamics of these schemes and the perturbation growth with nonuniform laser from the results of 2D simulation using our integrated code.

Paper Details

Date Published: 11 January 2000
PDF: 8 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375141
Show Author Affiliations
Naofumi Ohnishi, Institute of Laser Engineering/Osaka Univ. (Japan)
Hideo Nagatomo, Institute of Laser Engineering/Osaka Univ. (Japan)
Hideaki Takabe, Institute of Laser Engineering/Osaka Univ. (Japan)
Hiroaki Nishimura, Institute of Laser Engineering/Osaka Univ. (Japan)
Masaharu Nishikino, Institute of Laser Engineering/Osaka Univ. (Japan)
Hiroyuki Shiraga, Institute of Laser Engineering/Osaka Univ. (Japan)
Tatsuhiko Yamanaka, Institute of Laser Engineering/Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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