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Fast ignition is a new scheme in láser fusión, in which higher energy gain with a smaller láser pulse energy is expected. A cone target has been introduced for realizing higher coupling efficiency. At ILE, Osaka University, a láser with four beams and a total output of lOUps -1 , láser for fast ignition experiment (LFEX), has been constructed and we have carried out an integrated experiment with one beam of the LFEX. Through experiments it was found that the coupling efficiency is degraded whendoi:10.1063/1.3526161 fatcat:wz2vhc7zonb2fexyyxs62arbfa