J. Phys. IV France
Volume 133, June 2006
Page(s) 899 - 901
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 899-901

DOI: 10.1051/jp4:2006133181

Preliminary results on the cryogenic target for FIREX project

A. Iwamoto1, R. Maekawa1, T. Mito1, M. Okamoto1, O. Motojima1, M. Nakai2, T. Norimatsu2 and K. Nagai2

1  National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
2  Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan

Preliminary tests on the cryogenic target for the fast ignition realization experiment (FIREX) project has been conducted. A foam shell method is proposed to realize its target design. A foam target consists of three parts: a foam shell, a conical laser guide and a liquid or gas feeder made of glass. The shell is a hollow sphere (500 ${\rm\mu}$m in diameter) with a uniform and thin foam layer ($\sim 20 $ ${\rm\mu}$m in thickness). Epoxy resin is utilized to assemble the parts into the target. Regarding target fabrication, one of the concerns is the influence on various thermal contractions from the different materials when it is cooled down to cryogenic environment. This paper describes the result on the validity check at cryogenic environment and the demonstration of H2 liquefaction using a dummy target instead of the foam target.

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