FIELD: cryogenic engineering. SUBSTANCE: cryostat includes heat-insulated helium reservoir with superconducting solenoid arranged inside it; helium reservoir is provided with filling neck and helium pipe line whose inlet is connected with heat exchanger arranged in this reservoir. Heat exchanger is fitted with throttling device at its inlet made in form of capillary tube secured on framework at thermal contact. Framework is mounted on surface of superconducting solenoid. The above-mentioned reservoir is also provided with capillary intake device made in form of tubular framework located coaxially relative to inner surface of reservoir at space relation. Tubes of framework are located at similar angular pitch; tubes are provided with slots and their outer surfaces are enclosed in material made from fine cellular capillary structure. Ends of tubes are connected to bushes located on opposite poles of helium reservoir and cavity of one of these bushes is connected with inlet end of capillary tube. Proposed cryostat ensures storage of helium during preset period of time at reduced gravitation within temperature range required for normal operation of superconducting solenoid; cryostat excludes rise of temperature and pressure in helium reservoir to levels at which solenoid may be brought out of superconducting state and helium may be discharged to surrounding medium; this is achieved due to continuous supply of liquid phase of helium stored in two-phase state to throttling device. EFFECT: enhanced efficiency. 2 cl, 2 dwg
