NMR apparatus with probe head and cryogenic container cooled together

摘要

A cooling device includes a thermally insulated housing (6) arranged directly above a cryostat (9). Heat transfer devices in suspended pipes (29a,29c) are directly inserted into cryogenic containers (2,3) and contact a radiation shield. The cryogenic containers are enclosed in an outer casing in the cryostat. An NMR magnet system is provided in the cryogenic container (2) in the cryostat on which is arranged an NMR test head (1) having a high frequency resonator (16) that receives NMR signals and a preamplifier (17). The cooling device cools the NMR test head and cryogenic containers and includes a cold head (4a) comprised of cryogenic coolers of varying cooling stages (12a,18a,19a) with different temperature levels. At least one of the cooling stages is connected to a heat transfer device. Thermally insulated transfer lines (7) and a compressor (5) of a cryogenic cooler or a pump comprise a cooling circuit with a cooling carrier between the cooling device and the NMR test head. An independent claim is also included for an NMR apparatus drive method.