Cryogenic cooling apparatus

A cryogenic cooling apparatus comprising:

• a vacuum container configured to form an airtight space capable of forming a vacuum and accommodate a first cooling object;
• a first bellows connected to a peripheral portion of an opening provided in the vacuum container and configured to form an expandable and contractible communication space, which is in contact with an atmosphere at an outer periphery and spatially connected to the airtight space at an inner periphery;
• a flange provided at a tip of the first bellows on a side opposite to the opening of the vacuum container and configured to fix a refrigerator;
• a first sleeve connected to a peripheral edge portion of an opening of the flange, into which the refrigerator is inserted, and configured to form a first accommodation space, which is in contact with the airtight space at an outer periphery and accommodates the refrigerator;
• a first heat-transfer block provided at a tip of the first sleeve on a side opposite to the flange and thermally connected to the first cooling object by being brought into contact with a first cooling block of the refrigerator;
• and
• a second bellows formed in a part of the first sleeve and configured to expand or contract the accommodation space depending on the refrigerator inserted into the accommodation space.