Regenerative cryocooler, cylinder used for the regenerative cryocooler, cryopump, recondensing apparatus, superconducting magnet apparatus, and semiconductor detecting apparatus

摘要

A cylinder used for a cold head of a regenerative cryocooler, the cylinder includes an inside having a hollow-shaped configuration for a regenerative material, wherein the thickness of the cylinder at a high temperature end is greater than the thickness of the cylinder at a low temperature end.