Computational study of x-ray radiation effects on hydrodynamic instability

Naofumi Ohnishi; Hideo Nagatomo; Hideaki Takabe; Hiroaki Nishimura; Masaharu Nishikino; Hiroyuki Shiraga; Tatsuhiko Yamanaka

doi:10.1117/12.375141

11 January 2000 Computational study of x-ray radiation effects on hydrodynamic instability

Naofumi Ohnishi, Hideo Nagatomo, Hideaki Takabe, Hiroaki Nishimura, Masaharu Nishikino, Hiroyuki Shiraga, Tatsuhiko Yamanaka

Author Affiliations +

Proceedings Volume 3886, High-Power Lasers in Energy Engineering; (2000) https://doi.org/10.1117/12.375141
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

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.

Citation Download Citation

Naofumi Ohnishi, Hideo Nagatomo, Hideaki Takabe, Hiroaki Nishimura, Masaharu Nishikino, Hiroyuki Shiraga, and Tatsuhiko Yamanaka "Computational study of x-ray radiation effects on hydrodynamic instability", Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); https://doi.org/10.1117/12.375141

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