Patent ID: 7279900

Claim:
A magnetic resonance apparatus having a superconducting magnet coil disposed in a cryostat, the apparatus comprising: a refrigerator cold head for cooling the magnet coil; a control valve for periodically supplying a working gas to said cold head, said control valve being rigidly mechanically connected to the cryostat; a compressor for compressing the working gas; a high-pressure line disposed between and connecting said compressor and said control valve to pass the working gas; a low-pressure line disposed between and connecting said control valve and said compressor to pass the working gas; a supply line disposed between and connecting said control valve and said cold head to periodically pass the working gas, thereby generating pressure pulses in the working gas; and at least one pressure reservoir disposed in at least one of said high-pressure line and said low-pressure line, said at least one pressure reservoir being mechanically rigidly connected to the cryostat and being connected to said compressor via a mechanically flexible line section.