[en] The description of the main systems of the modified heavy ion accelerator U-400 of the Flerov Laboratory of Nuclear Reactions is presented including the ECR ion source, system of external injection of low energy ions onto median plane. The characteristic parameters for obtaining of accelerated heavy ions from krypton ions to more heavier ones are also presented. The structure and parameters of a new beam line and vacuum chamber for irradiation of polymeric and other materials on the modified cyclotron U-400 are presented too. The new possibilities for the production of a unique track membrane are discussed