Positioning device for body in cryogenic fluid, maintains body in position by friction without dissipating energy into surrounding environment

摘要

The body (1) is maintained in its position by friction (3) without any dissipation of energy into the surrounding cryogenic environment. The body is held in position using one or more means chosen from tilt bearings, magnetic bearings, gas bearings, fluid bearings, glide bearings or elastic hinges. Movement of the body is carried out using at least one actuator (5) for each displacement device, e.g. a magnetically movable component, especially an immersion coil, or a ceramic component which changes shape as a result of electrical and/or magnetic stimulus.