CRYOGENIC RECEIVING FOCAL UNIT FOR TELESCOPES OF RADIOINTERFEROMETRIC COMPLEX OF NEW GENERATION von Ipatov, A. B., Chmil, V. M., Skresanov, V. M., Ivanov, D. V., Mardyshkin, V. V., Chernov, V. K., Pylypenko, O. M., Kirilenko, A. A.