Cooling device with cryostat and cold head having reduced mechanical coupling

摘要

A cooling device (20) has a cryostat (23) and a cold head (1), in particular, the cold head (1) of a pulse tube cooler. The cryostat (23) has a vacuum container (4) with a vacuum container wall (4a), wherein the vacuum container wall (4a) seals off a vacuum inside the vacuum container (4) from the environment. A flexible sealing section (6) connects the vacuum container wall (4a) directly or indirectly to the room temperature part (1a) of the cold head (1). The flexible sealing section (6) seals off the inside of the cryocontainer (2) from the environment. The cooling device further reduces mechanical coupling between the cold head and the cryostat, in particular, in order to enable performance of NMR measurements with fewer disturbances due to external vibrations.

主权项

1. A cooling device comprising:
a cold head or a cold head of a pulse tube cooler, said cold head having a room temperature part and a cooling arm; and a cryostat having an access opening, said cryostat comprising:
a vacuum container having a vacuum container wall, wherein said vacuum container wall seals off a vacuum inside said vacuum container from an environment;a cryocontainer disposed within said vacuum container, said cryocontainer structured to keep a cryogenic liquid and/or a cryogenic gas, said cryocontainer having a cryocontainer wall, wherein said cryocontainer wall seals off an inside of said cryocontainer from said vacuum of said vacuum container;decoupling elements disposed between said room temperature part of said cold head and said vacuum container wall, thereby mounting said room temperature part to said vacuum container wall in a vibration-damped fashion, wherein said cooling arm of said cold head projects along a longitudinal axis through said access opening of said cryostat and into said cryocontainer; anda flexible sealing section disposed between said vacuum container wall and said room temperature part, thereby directly or indirectly connecting said vacuum container wall to said room temperature part of said cold head, wherein said flexible sealing section seals off said inside of the cryocontainer from the environment.