J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 899-901
Preliminary results on the cryogenic target for FIREX projectA. 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 m in diameter) with a uniform and thin foam layer ( 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.
© EDP Sciences 2006