Abstract: In a magnet system: —a superconducting main field magnet (7) generates a magnetic field in a first sample volume (16), —a superconducting additional field magnet (22) generates another field in a second sample volume (24), —a cryostat (2) has a cooled main coil container (6), an evacuated RT (room temperature) covering (4), and an RT bore (14) which extends through the main and the additional field magnets, and —a cooled additional coil container (21) in a vacuum. The RT covering has a flange connection (17) with an opening (19) through which the RT bore extends, a front end of the additional coil container protrudes through the opening into the RT covering such that the additional field magnet also protrudes through the opening into the RT covering, and a closure structure (20) seals the RT covering between the flange connection and the RT bore.

Abstract: In a magnet system: —a superconducting main field magnet (7) generates a magnetic field in a first sample volume (16), —a superconducting additional field magnet (22) generates another field in a second sample volume (24), —a cryostat (2) has a cooled main coil container (6), an evacuated RT (room temperature) covering (4), and an RT bore (14) which extends through the main and the additional field magnets, and —a cooled additional coil container (21) in a vacuum. The RT covering has a flange connection (17) with an opening (19) through which the RT bore extends, a front end of the additional coil container protrudes through the opening into the RT covering such that the additional field magnet also protrudes through the opening into the RT covering, and a closure structure (20) seals the RT covering between the flange connection and the RT bore.

Abstract: A cryostat configuration with a vacuum vessel (1) and a cryogen vessel (2) built into it, and a sleeve (8), into which a cryocooler (7) is built, wherein the upper, warm end of the sleeve is connected to the outer jacket and the lower, cold end facing the cryogen vessel is hermetically sealed by a sleeve base (9) is characterized in that the cryogen vessel is hermetically sealed except for a gas capillary (13) and filled with gaseous fluid (12) at a pressure below the vapor pressure of the liquid phase of the fluid at the corresponding operating temperature and the coldest stage of the cryocooler is connected to the heat exchanger (11) disposed inside the cryogen vessel in a manner that ensures good thermal conduction.