A shield for a cryogenic chamber and a cryogenic chamber comprising a shield are described. In an example embodiment, a cryogenic chamber comprises an interior housing comprising housing walls that define an action chamber. The action chamber is configured to be cryogenically cooled to an action temperature. The cryogenic chamber further comprises an interior shield at least partially sandwiched within the housing walls. The interior shield is made of a first material that acts as a superconductor at the action temperature.

A refrigerated food service counter includes a case having sidewalls that define an interior space. A refrigeration unit is in thermal communication with the sidewalls of the case. A bracket is disposed within the interior space, and a food service pan is supported by the bracket. A cooling bar is movably attached to the bracket. The cooling bar is positioned proximate the food service pan and in thermal communication with a select sidewall of the case. The refrigeration unit draws heat from the sidewalls. The select sidewall in turn draws heat from the cooling bar, and the cooling bar in turn draws heat from the food service pan.

A portable refrigerator includes a main housing, a refrigerator cover, a cooling mechanism, a rechargeable battery pack and a control unit. The cooling mechanism includes heat exchanging tubes, a compressor, an evaporator and a condenser connected to the evaporator and the compressor. The rechargeable battery pack is detachably attached on a power compartment of the main housing. The control unit is supported in the main housing and electrically connected to the rechargeable battery pack and the cooling mechanism for centrally controlling an operation of the cooling mechanism. A predetermined amount of refrigerant is arranged to controllably pass through the heat exchanging tubes, the condenser, the evaporator and the compressor for extracting heat from the accommodating cavity.

A remote cooling system of super-conducting magnets uses a closed cycle auxiliary flow circuit in a cryogenic cooling system. The super-conducting magnet is connected to the cryogenic cooling system via a flexible interface. This flexible interface has a rigid insert on its distal end and may be connected to a cryostat on its proximal side. The rigid end may be inserted in a mating cryogenic interface at the super-conducting magnet. The closed cycle auxiliary flow circuit allows the cryogenic cooled magnet to operate at its designed magnetic field strength and can keep the magnet operational at cryogenic temperatures for extended periods of time since no cryogenic fluid needs to be replenished. Such a system can have test samples raised to room temperature to make sample changes without any need to warm up the magnet. This makes sample change time and experiment turnaround time significantly shorter, and significantly increases productivity.

A remote cooling system of super-conducting magnets uses a closed cycle auxiliary flow circuit in a cryogenic cooling system. The super-conducting magnet is connected to the cryogenic cooling system via a flexible interface. This flexible interface has a rigid insert on its distal end and may be connected to a cryostat on its proximal side. The rigid end may be inserted in a mating cryogenic interface at the super-conducting magnet. The closed cycle auxiliary flow circuit allows the cryogenic cooled magnet to operate at its designed magnetic field strength and can keep the magnet operational at cryogenic temperatures for extended periods of time since no cryogenic fluid needs to be replenished. Such a system can have test samples raised to room temperature to make sample changes without any need to warm up the magnet. This makes sample change time and experiment turnaround time significantly shorter, and significantly increases productivity.

A vacuum adiabatic body includes a first plate; a second plate; a seal; a support; a heat resistance unit; and an exhaust port, wherein the heat resistance unit includes a conductive resistance sheet connected to at least one of the first and second plates, the conductive resistance sheet resisting heat conduction flowing along a wall for the third space, the conductive resistance sheet includes a mounting part mounted on the first or second plate and a curved part having at least one portion depressed into the third space, a coupler that fixes the conductive resistance sheet to the first or second plate is formed on the mounting part, and the curved part includes a first curved part depressed toward the third space and a second curved part extending from the first curved part, the second curved part surrounding an edge portion of the first or second plate.

A system (100) for controlling temperature of a persistent current switch (120) operating in a background magnetic field includes a heat exchanger (138), a loop tube (135), a ball valve (245) and multiple electromagnets (251, 252). The heat exchanger disperses heat to a cryocooler (106). The loop tube enables flow of coolant to convectively transfer thermal energy generated by the persistent current switch to the heat exchanger. The ball valve is integrated with the loop tube between the persistent current switch and the heat exchanger, and contains a ferromagnetic ball (250). The electromagnets are positioned outside the loop tube adjacent to the ball valve, where energizing a first electromagnet of the multiple electromagnets magnetically moves the ferromagnetic ball to a first position opening the loop tube and enabling the flow of the coolant, and energizing a second electromagnets magnetically moves the ferromagnetic ball to a second position closing the loop tube and blocking the flow of the coolant.

A system (100) for controlling temperature of a persistent current switch (120) operating in a background magnetic field includes a heat exchanger (138), a loop tube (135), a ball valve (245) and multiple electromagnets (251, 252). The heat exchanger disperses heat to a cryocooler (106). The loop tube enables flow of coolant to convectively transfer thermal energy generated by the persistent current switch to the heat exchanger. The ball valve is integrated with the loop tube between the persistent current switch and the heat exchanger, and contains a ferromagnetic ball (250). The electromagnets are positioned outside the loop tube adjacent to the ball valve, where energizing a first electromagnet of the multiple electromagnets magnetically moves the ferromagnetic ball to a first position opening the loop tube and enabling the flow of the coolant, and energizing a second electromagnets magnetically moves the ferromagnetic ball to a second position closing the loop tube and blocking the flow of the coolant.

The present disclosure relates to using an integrated cooling circuit to provide both forced-flow pre-cooling functionality and closed-loop thermosiphon cooling for persistent mode operation of a superconducting magnet. In one embodiment, the integrated cooling circuit shares a single set of cooling tubes for use with both the forced-flow pre-cooling circuit as well as the closed-loop operating-state cooling circuit.

The present disclosure relates to using an integrated cooling circuit to provide both forced-flow pre-cooling functionality and closed-loop thermosiphon cooling for persistent mode operation of a superconducting magnet. In one embodiment, the integrated cooling circuit shares a single set of cooling tubes for use with both the forced-flow pre-cooling circuit as well as the closed-loop operating-state cooling circuit.