Recent progress of fuel layering study for FIREX cryogenic targetA. Iwamoto, T. Fujimura, M. Nakai, T. Norimatsu, H. Shiraga, H. Azechi, Y. Fujimoto, S. Machi and H. SakagamiEPJ Web of Conferences, 59 (2013) 12002DOI: https://doi.org/10.1051/epjconf/20135912002