JINR Dubna, KIREE and PGPI RAS Moskow
IAP RAS N. Novgorod,KPNPI RAS Gatchina
An Optical Cryostat with helium-3 Sorption Refrigerator.
An optical cryostat with 3Не sorption refrigerator is proposed. The refrigerator is mounted on a copper plate cooled by pulse tube cryorefrigerator SUMITOMO SRP-052A. It has both sorption steps: the first one with working gas 4Не is intended for condensation of 3Не, the second one with 3Не for cooling down to 0.3K. The cryostat is an independent device that does not contain the external gas communications aimed at reaching low temperatures, and working gases are stored in cans integrated with the cryostat at 50atm. Lowest temperature 0.3K is kept during 30 hours. Time of recondensation is about 0.5 hour.
Production of cryostats for research and applied sciences.