Gravitational Wave Group

CLIK Refrigerator Cooling Ability

Cryostat

The cryostat in CLIK is cooled by only thermal conduction with a GM refrigerator. The 1st head and the 2nd of GM are connected with a 40K and a 4 K radiation shield, respectively. Each radiation shield is covered with aluminized multi-layer film. To isolate the vibration from the GM head, the soft structure is used between the 4K shield inside the chamber and the 2nd head.



Cryostat Structure

Cooling Speed

Cryostat is cooled to about 9 K for 3.5 days and to 7 K for 9 days if there is nothing inside. The designed max heat load inside is 700 [mW].