JINR Dubna, KIREE and PGPI RAS Moskow
IAP RAS N. Novgorod,KPNPI RAS Gatchina
Helium Cryostat With Helium-3 Sorption Refrigerator for cooling to 0.3K
A two-stage refrigerator with sorption evacuation of 4He and 3He is proposed. The apparatus needs no external pumps or gas lines. The refrigerator is constructed in the form of an insert 80 mm in diameter immersed in a helium cryostat by sorption pumps 3Не pot being placed inside vacuum vessel of the cryostat. End temperature 0.33 K is kept during 30 h after condensation of 3He at a useful heat load of 10-6W. The recycling time is 0.5 h.
Production of cryostats for research and applied sciences.