  The problem of creation of high energy neutrino beams on the basis of modern
and future circular proton accelerators with the help of traditional technology
seems to be expensive and difficult. Because of this, we propose the solution
of this problem based on the usage of focusing bend single crystals. In the
paper we demonstrate the possibilities of acceptance and focusing of a pion
beam with the help of a crystal optical lens system. As an illustration of
these features the calculated neutrino fluxes for energy of circulating proton
beam equal to 6.5 TeV are presented.
