Gain Factor of the Pelletized Cold Neutron Moderator at 22 K

The current results of operation of the first CM1 cryogenic moderator in the direction of neutron beams 7, 8, 10, and 11 at the power of IBR-2 with a new cryogenic system are presented in the paper. A new cryogenic system allowed to reduce the temperature of the working mixture in the chamber of the CM1 moderator when operating at a reactor power of 2 MW by 10 K to ~22–23 K which made possible to acquire gain in the intensity of cold neutrons ~15–20%.