CRYOSTAT WITH PRECOOLING PART OF PULSE-TUBE TYPE REFRIGERATOR

摘要

PURPOSE: To reduce a heat flowing into a cold head by thermal conduction and thermal radiation from a virtually ordinary temperature and thereby to attain a high efficiency in a cryostat of a pulse tube type refrigerating machine constructed of a pulse tube, the cold head, a cold accumulator, etc. ;CONSTITUTION: A pulse tube 107 is disposed at the axial center of a cold accumulator 105 joined to a cold head 106, while a directional part 119 giving directionality to a flow of a working fluid is provided in a part from a low- temperature part to an ordinary-temperature part in the pulse tube 107, and a precooling part 117 provided in an outer tube of the cold accumulator in the circumferential direction of the directional part 119 is cooled from inside by the working fluid.;COPYRIGHT: (C)1994,JPO