An NMR apparatus comprising an NMR magnet system disposed in a first
cryocontainer (2) of a cryostat (9), and an NMR probe head (1), wherein
the first cryocontainer (2) is installed in an evacuated outer jacket and
is surrounded by a radiation shield (24) and/or a further cryocontainer
(3), wherein a cooling device is provided for cooling the NMR probe head
(1) and a cryocontainer (2, 3), which comprises a cold head (4, 4a, 4b,
4c) with several cold stages (12a, 12b, 12c, 18a, 18b, 18c, 19a), wherein
one cold stage (12a, 12b, 12c, 18a, 18b, 18c, 19a) is connected to a
heat-transferring device, and wherein a cooling circuit is provided
between the cooling device and the NMR probe head (1), is characterized
in that the cooling device is disposed in a separate, evacuated housing
(6) which is positioned directly above the cryostat (9), wherein the
heat-transferring device is inserted directly into suspension tubes (29a,
29c) of the cryocontainer (2, 3) and/or is in contact with the radiation
shield (24). This effects a simple construction that is efficient for
cooling an NMR apparatus.