Cooling apparatus

Abstract

A cooling apparatus has a liquid helium container for containing liquid helium, a vacuum chamber for providing heat insulation to external air, and a cooling head disposed in the vacuum chamber and capable of cooling down to a temperature region corresponding to the melting point of the liquid helium in the liquid helium container. An inlet port is disposed in the vacuum chamber for introducing thereinto the liquid helium stored in the liquid helium container. A vacuum heat insulation piping transfers liquid helium from the liquid helium container to the inlet port. A first piping is disposed in the vacuum chamber for transferring the liquid helium from the inlet port to the cooling head. A pump pumps liquid helium from the liquid helium container to the cooling head via the vacuum heat insulation piping, the inlet port and the first piping. A second piping transfers the liquid helium from the cooling head to the pump. At least part of the second piping is disposed in the vacuum chamber.

Dependencies are inferred from the claim text.