Plasma and Fusion Research

Volume 4, S1007 (2009)

Rapid Communications

A Proposed Procedure for Temperature Control of the Cryogenic Target for the FIREX Project
Akifumi IWAMOTO, Takeshi FUJIMURA1), Mitsuo NAKAI1), Takayoshi NORIMATSU1), Keiji NAGAI1), Ryuji MAEKAWA and Hitoshi SAKAGAMI
National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
(Received 16 December 2008 / Accepted 29 May 2009 / Published 9 September 2009)


One of the techniques to produce a uniform solid fuel layer for the Fast Ignition Realization EXperiment (FIREX) target is applying a solid fuel redistribution process. During the redistribution process, temperature control is essential for the FIREX target, because a cone guide, also called a conical laser guide, causes temperature non-uniformity. To minimize its temperature distribution, one possible procedure is temperature control at the cone guide. A radiation plate for indirect temperature control, installed next to the cone guide, is proposed. As the heat input to the radiation plate was varied, the temperature profile of the target was calculated using the ANSYS code. The optimal heat input was evaluated. The feasibility of using a radiation plate is discussed.


cryogenic target for FIREX project, fast ignition, layering process, fuel redistribution, temperature control by radiation plate

DOI: 10.1585/pfr.4.S1007


  • [1] L.R. Foreman and J.K. Hoffer, Nucl. Fusion 28, 1609 (1988).
  • [2] J.K. Hoffer and L.R. Foreman, Phys. Rev. Lett. 60 (13), 1310-13 (1988).
  • [3] G.W. Collins, D.N. Bittner, E. Monsler, S. Letts, E.R. Mapoles and T.P. Bernat, J. Vac. Sci. Technol. A 14, 2897 (1996).
  • [4] A. Iwamoto, R. Maekawa, T. Mito, H. Sakagami, O. Motojima, M. Nakai et al., Fusion Sci. Technol. 51, 735 (2007).
  • [5] A. Iwamoto, T. Fujimura, M. Nakai, T. Norimatsu, K. Nagai, R. Maekawa et al., “Temperature control in a cryogenic target with a conical laser guide for fuel layering”, to be published in Proceedings of 18th TOFE.

This paper should be cited as follows:

Akifumi IWAMOTO, Takeshi FUJIMURA, Mitsuo NAKAI, Takayoshi NORIMATSU, Keiji NAGAI, Ryuji MAEKAWA and Hitoshi SAKAGAMI, Plasma Fusion Res. 4, S1007 (2009).