Abstract: A cryopreservation device of the present invention includes: a cryopreservation vessel; a house which houses the cryopreservation vessel; and a handling robot provided on the house, wherein the cryopreservation vessel comprises a vessel body which holds a low-temperature liquefied gas, a cap which closes an opening section of the vessel body and has a plurality of insertion holes formed to pass through in a vertical direction, and ampoule storing tools which are housed so as to be able to pass through the insertion holes of the cap, in which the ampoule storing tools are each comprised of a support pillar and a plurality of ampoule storing sections which are attached to the support pillar so as to be arrayed in a vertical direction of the support pillar, and an ampoule-putting-in/out work hole is formed in the cap so as to pass through in a vertical direction.

Abstract: In a pressurized superfluid helium cryostat, a first flow rate control valve and a preliminary cooler are installed between a liquid helium inlet at a bottom portion of a 4.2K liquid helium bath and a J-T valve which is a second flow rate control valve. The preliminary cooler is cooled by depressurization by a vacuum pump. The liquid taken in from the 4.2K liquid helium bath is cooled to a temperature of the preliminary cooler by J-T expansion in the first flow rate control valve, and stored in the preliminary cooler. The liquid helium in the preliminary cooler can be cooled below 2.2K, and further subjected to J-T expansion in the J-T valve. By installation of the preliminary cooler, the efficiency of the superfluid cooler can be increased as compared to a conventional type.

Abstract: A cryogenic system for a superconducting magnet comprises a closed-loop cooling path. The closed-loop cooling path comprises a magnet cooling tube thermally coupled to the superconducting magnet. The magnet cooling tube comprises a cryogen flow passage. The closed-loop cooling tube further comprises a re-condenser is fluidly coupled to the magnet cooling tube through tube sections and a liquid cryogen container fluidly coupled between the magnet cooling tube and the re-condenser. At least one gas tank is fluidly coupled to the magnet cooling tube through a connection tube.

Abstract: A cryo probe head for the transmission/reception of RF signals for NMR measurements with a heat exchanger (1) for cooling heat sources (5), the heat exchanger having a contact element (4.2) for thermal connection between a cryogenic fluid and the heat source, is characterized in that the heat exchanger comprises a container having an interior volume VB into which a first cryogenic fluid F1 that has a liquid component F1L and a gaseous component F1G flows through an inflow conduit (8) and from which a second cryogenic fluid F2 that has liquid component F2L and a gaseous component F2G flows out through an outflow conduit (9). The inflow conduit has a flow cross-section QZ and a circumference UZ from which a characteristic conduit volume VZ=4·Q2Z/UZ results, wherein VB>10·VZ, and the outflow conduit has a flow diameter QA wherein QA?QZ. The contact element is in close thermal contact with both the liquid volume component VL of the cryogenic fluid and with the heat source.

Abstract: In a superconducting magnet, including a vacuum vessel, a coil vessel inside the vacuum vessel, and a superconducting coil inside the coil vessel for generating a magnetic field, has a magnetic member, disposed inside the vacuum vessel, supported with thermal insulation, for compensating the magnetic field; a heat exchange device disposed outside the vacuum vessel for supplying to or absorbing heat from the vacuum vessel; and thermal conducting members thermally connecting the heat exchange device via the vacuum vessel to the magnetic member. An MRI including the superconducting magnet is also disclosed.

Abstract: The present disclosure provides various methods and systems for manufacture, transport and delivery of material including highly polarized nuclei that is in a hyperpolarized state.

Abstract: An energy dissipation arrangement for a cryogenically cooled superconductive magnet comprising a plurality of superconductive coils (10) connected in series and housed within a cryostat (24), comprising a superconducting switch (25) having a superconductive current path (28) in series with the superconductive coils (10); and a resistor (38), external to the cryostat, electrically connected in parallel with the superconductive current path (28) of the superconducting switch (25).

Abstract: An inventive cryostat for use in a biomagnetic measurement system. The cryostat comprises at least one inner vessel and at least one outer vessel, and at least one cavity arranged between the inner vessel and the outer vessel, wherein negative pressure can be applied to the cavity. At least one radiation shield for shielding the cryostat from electromagnetic radiation is housed in the cavity. The cryostat furthermore comprises at least one ground lead for connecting the radiation shield to an electrical ground or earth. The ground lead is connected to the radiation shield in the cavity. The cryostat has at least one electrical feed-through, by means of which the ground lead can be contacted electrically from an outer side of the cryostat through the outer vessel.

Abstract: A quench line and exit plenum configuration for a mobile MRI system housed in a transportable trailer includes an exit plenum with deflector plates that direct the quench flow of cold gases upward and away from surrounding objects. In addition, the plenum also includes dual vents to facilitate optimum gas flow and water drainage. The deflector plates are configured to utilize the Venturi effect to create an auxiliary flow of the ambient air to help deflect the flow of cold gases away from nearby pedestrians, when the magnet is quenching, and to enable service personnel to fill the magnet safely while in the vicinity of the exit plenum.

Abstract: A superconducting magnet system comprises an annular cryogenic vessel (1) having an outer vacuum container (2) and containing a superconducting magnet (3) within an annular reservoir (4) containing liquid helium. A cryocooler (5) has a first stage (7) linked by a thermal link (9) to a thermal shield (6) within the vacuum space surrounding the reservoir (4) and a second stage (8) that serves to recondense evaporating helium gas from the reservoir (4). In the absence of special measures, such a cryocooled shield (6) would warm up quickly in the event of a power failure and would radiate heat onto the reservoir (4) causing all of the liquid helium to evaporate. However an inertial shield (11) is provided between the reservoir (4) and the thermal shield (6) in such a position that the outgoing helium gas from the reservoir (4) carries away the heat being transferred to the inertial shield (11) from the thermal shield (6) and thus slows down the rate at which the thermal inertial shield (11) warms up.

Abstract: A cryostat (110) for use in a biomagnetic measurement system is proposed. The cryostat (110) comprises at least one inner vessel (112) and at least one outer vessel (114), and at least one cavity (126) arranged between the inner vessel (112) and the outer vessel (114), in which negative pressure can be applied to the cavity (126). The inner vessel (112) has a base part (136) and a sidewall (134) connected to the base part (136) in a circumferential connection region (140). The inner vessel (112) has a circumferential strengthening element (142) in the connection region (140), with the strengthening element (142) having a first fiber composite material with a first fibrous material (158) with an anisotropic orientation and with a local preferred orientation, the local preferred orientation being oriented substantially in the circumferential direction of the cryostat (110).

Abstract: A pre-assembled, pre-tested quench path outlet assembly for providing a cryogen egress path from a cryogen vessel. A quench valve (26) is mounted within a flange (28). A cryogen egress tube (32) is sealed in leak-tight manner to the flange, to define a cryogen egress path (40) extending through the cryogen egress tube, the flange and the quench valve. The cryogen egress path is closed by a burst disc (34). In use, the pre-assembled, pre-tested quench path outlet assembly is mounted onto the cryogen vessel such that thermal stratification of gas within the cryogen vessel under normal conditions causes a lower end of the cryogen egress tube to be at a temperature below the freezing points of common air components.

Abstract: A cryogenically-cooled superconducting RF head-coil array which may be used in whole-body MRI scanners and/or in dedicated, head-only MRI systems. An RF head-coil array module may comprise a vacuum thermal isolation housing comprising a double wall hermetically sealed jacket that (i) encloses a hermetically sealed interior space under a vacuum condition, and (ii) substantially encloses an interior chamber region that is separate from the hermetically sealed interior space and is configured to be evacuated to a vacuum condition. A plurality of superconductor radiofrequency coils are disposed in the interior chamber region, and each radiofrequency coil is configured for at least one of generating and receiving a radiofrequency signal for at least one of magnetic resonance imaging and magnetic resonance spectroscopy. At least one thermal sink member may be disposed in the interior chamber region and in thermal contact with the superconductor radiofrequency coils.

Abstract: A cryostat includes a thermal interface located at a first end and a cryocooler located at a second end. A thermal link has a thermal connector thermally linking the thermal interface and the cryocooler below a critical temperature. The thermal link is separated from one of the thermal interface and the cryocooler above the critical temperature. A method of operating the cryostat is also disclosed.

Abstract: A Dewar apparatus includes a focal plane array (FPA) component coupled to an FPA carrier, and a cold bridge coupled to the FPA carrier. A cold shield is aligned with the optical axis and coupled to the cold bridge (e.g., via a direct-metal bond), and at least one cryostat enclosure is similarly coupled to the cold bridge such that it has an axis that is noncollinear with the optical axis.

Abstract: A method of removing heat due to compression of a working gas from a linear cryocooler is disclosed. The cryocooler includes a sealed housing, a displacer including a displacer piston and a displacer cylinder, and a compressor all arranged within the housing. The compressor includes a compressor piston that is movable within a compression chamber. The method includes providing a port in the compression chamber to remove heat from the compression chamber due to the compression of the working gas to the housing prior to entering the displacer piston.

Abstract: According to one embodiment, there is provided a superconducting magnetic apparatus that conductively cools a superconducting coil contained in a vacuum container with a cryogenic refrigerator. The superconducting magnetic apparatus includes a thermal conductor thermally connecting a cooling stage of the cryogenic refrigerator to the superconducting coil, a radiation blocking layer provided around the superconducting coil, and a coil supporting body supporting the superconducting coil by partial or entire contact with a surface of the superconducting coil.

Abstract: The present invention relates to a system, and to a method for installation of the system, for whole-body cryotherapy applicable to humans or animals at a temperature of the order of ?110° C. According to the invention, the treatment chamber and the refrigerating elements, or at least one of these two elements, are mounted on at least one mobile or transportable self-supporting structure, in a way that permits use from the self-supporting structure. It also relates to a whole-body cryotherapy system equipped with pre-chambers at intermediate temperatures, defining a modifiable or removable two-way path between the treatment chamber and the outside, and including elements for local cryotherapy. It also relates to such a system divided into several separable modules.

Abstract: A suspension device mounts a superconducting magnet heat shield enclosure that encompasses a low-temperature container, that encompasses a superconducting magnet and holds coolant for cooling the superconducting magnet. The low-temperature container has an outer heat shield layer and an inner heat shield layer. A vacuum jacket encompasses the heat shield enclosure and has an outer vacuum shell and an inner vacuum shell. A first set of suspension parts connects the outer vacuum shell with the low-temperature container, and a second set of suspension parts connects the outer heat shield shell with the low-temperature container. Since the second set of suspension parts connect the heat shield enclosure directly with the low-temperature container, this reduces the relative movement between the two parts, thus alleviating the streaking phenomenon in a magnetic resonance image, if the superconducting magnet is part of a magnetic resonance imaging system.

Abstract: An automatic temperature regulating device for controlling the flow of a cooling gas through a conduit. The device consists of a plurality of flaps connected to the conduit and made of a shape memory alloy, whereby when in the austenite phase said flaps are in a relatively open state and when in the martensite phase said flaps are in a relatively closed state.

Abstract: An automatic filling termination device and a cryogenic vessel are provided including a body with a chamber, defined in the cryogenic vessel and provided with an inlet, communicated with the inlet for filling cryogenic medium into the chamber, and an outlet, arranged on the top wall of the body for discharging the cryogenic medium in the chamber into the cryogenic vessel; a flow termination member blocking the outlet, defined in the chamber of the body and has a predetermined weight to not be floated in the cryogenic medium; a floater, located outside the body and moving up and down when the liquid level of the cryogenic medium as filled into the cryogenic vessel is changed; and a connection, penetrated through the outlet to connect the flow termination member with the floater, wherein the outlet internal diameter is greater than the connection outer diameter by a predetermined dimension.

Abstract: Apparatus for cooling a cooled equipment, comprising: a cryogen vessel (10) housing the cooled equipment; a gaseous cryogen filling the cryogen vessel; a refrigerator (12) having a cooling surface exposed to the interior of the cryogen vessel (10) so as to cool the gaseous cryogen; and a gas current generator arranged to cause circulation of the gaseous cryogen freely within the cryogen vessel, such that the gaseous cryogen is cooled by the refrigerator, and is warmed by heat from the cooled equipment, thereby cooling the cooled equipment.

Abstract: Cryogenic refrigeration employs a pulse tube cryo-cooler and a dilution refrigerator to provide very low temperature cooling, for example, to cool superconducting processors. Continuous cryogenic cycle refrigeration may be achieved using multiple adsorption pumps. Various improvements may include multiple distinct thermal-linking points, evaporation pots with cooling structures, and/or one or more gas-gap heat switches which may be integral to an adsorption pump. A reservoir volume may provide pressure relief when the system is warmed above cryogenic temperature, reducing the mass of the system. Additional heat exchangers and/or separate paths for condensation and evaporation may be provided. Multi-channel connectors may be used, and/or connectors formed of a regenerative material with a high specific heat capacity at cryogenic temperature. Flexible PCBs may provide thermal links to components that embody temperature gradients.

Abstract: There are provided a system and a method for cryopreserving a liquid biological material disposed in a bag having a longitudinal axis. The system comprises a bag holder for holding the bag, so that the biological material therein has a surface area S, and a volume V, a tank containing a cryogenic fluid, a mechanism for the immersion of the bag holder into the tank along the longitudinal axis, an opening in the tank for insertion therethrough of the bag holder, and a guide member extending from the opening into the tank. There are further provided a system and a method for warming a cryopreserved liquid biological material disposed in a bag.

Abstract: Provided is an apparatus and method for introducing a sample into a cryogenic system comprising, an airlock chamber, a sample path having a first end connected to the airlock chamber and a second end connected to a cryogenic helium bath, an equilibrator, inserted into the sample path and positioned between the airlock and the cryogenic bath and which allows for passage of a sample to the cryogenic helium bath, and a cooling unit to coupled to the equilibration to control the temperature of the equilibrator. A machine-readable medium, comprising instructions which when executed by a controller causes a sample to be positioned within the cryogenic system, is also provided.

Abstract: An energy efficient cooling system that employs liquid air in order to eliminate potentially harmful effects associated with some refrigerants with regard to both humans and the environment. The system includes an insulated container configured to contain liquid air at the appropriate low temperature so that it can remain in its liquefied state. The system further includes at least one air flow device, which may be a compressor and/or a fan. The system also includes a valve-controlled piping system for moving the cool air to an outlet, such as a duct system. Thereafter, the cool air may be distributed throughout a room, building or other area for which cooling is desired.

Abstract: A method of rotating a sample for use in a cryocooler, having the steps of mounting a sample in a sample mounting apparatus, the apparatus comprising a housing having an outer wall surface, an inner wall surface, a mount attached to the inner wall surface for supporting the sample, and a motor for rotating the sample, and an exchange gas to provide thermal communication between the moving sample and the inner housing surfaces; sealing the housing by applying a sealant to adjoining parts of the housing such that the joints are air tight; evacuating the housing; adding an inert gas to the housing; sealing the inert gas in the housing; attaching the outer wall surface of the housing to a cryocooler; and rotating the sample by engaging the motor. Also disclosed is a cryogenic apparatus having a sample holder; a cryo-cooler; a thermal link connecting the sample holder and the cryo-cooler; and a motor attached to the sample holder for rotating a sample.

Abstract: The present invention provides an apparatus and method for automatically disconnecting a cryocooler from a cold mass reservoir of a MR system. A cryocooler thermal link includes a first end plate configured to be thermally connected to a cryocooler and a second end plate configured to be thermally connected to a cold mass. A wall encloses a space between the first and the second end plates, the wall having a first end attached to the first end plate and a second end attached to the second end plate. A working fluid is positioned in the space.

Abstract: A superconducting magnet assembly and method of cooling a superconducting magnet assembly includes thermally connecting a pulsating heat pipe to the superconducting magnet assembly and adding a liquid cryogen to the pulsating heat pipe. The superconducting magnet assembly also includes a coil former, at least one superconducting solenoid magnet comprising at least one superconducting winding wrapped about the coil former and configured to generate a magnetic field, and at least one pulsating heat pipe thermally connected to the at least one superconducting solenoid magnet. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

Abstract: A apparatus for low AC loss thermal shielding includes a plurality of thermally conducting fibers positioned along a desired direction of heat conduction. The fibers are electrically insulated from each other. The fibers are bonded together with a matrix, and a thermal link connects the bonded fibers to a cryogenic cold head.

Abstract: A cryostat configuration has a magnet coil system (2) disposed in a helium tank (1), and a horizontal room temperature bore (3) which provides access to a volume under investigation in the center of the magnet coil system (2). The helium tank (1) contains undercooled liquid helium at a temperature of less than 3.5 K, in particular of approximately 2 K, and the cryostat configuration has at least one vertical tower structure (4) on its upper side for filling in and evaporating helium. The tower structure (4) contains a container (5) with liquid helium of 4.2 K which is separated from the helium tank (1) by a thermal barrier (7), and the helium tank (1) contains an undercooling unit (9). This yields a compact cryostat configuration which achieves continuous, stable long-term operation with an undercooled high-field magnet coil.

Abstract: Apparatus and methods for freezing a tissue sample in preparation of sectioning. Generally, the apparatus comprises a chuck and a tissue heat sink that are adapted to rapidly freeze a tissue sample before being sectioned in a cryostat. While the chuck and heat sink may be made of any suitable material, in some cases, the chuck and heat sink include copper, a copper alloy, bronze, or a bronze alloy. To keep the chuck and heat sink from tarnishing, they can be covered with a non-tarnishing coating material, such as tetrafluoroethylene. Additionally, in order to secure the tissue sample that is embedded in a cutting medium to the chuck, the chuck preferably includes one or more dovetail-shaped apertures, such as a dovetail-shaped groove.

Abstract: A device and method suitable for the cryopreservation of all types of biological cells is described. In this method, an ultra-fast cooling/warming device system is used to achieve vitrification of individual cells or cell suspensions without cryoprotectant agents (CPA) or with a low concentration of CPAs (<1M), to attenuate the formation of intracellular ice crystal formation during cooling, and to minimize devitrification during subsequent warming. The device system applies oscillating heat pipe (OHP) and nanofluid techniques, and is built through microfabrication. Several devices may be networked to increase the total volume of cell samples that the cryopreservation system can process simultaneously.

Abstract: A cryostat of a superconducting cable disclosed herein includes an inner metallic tube filled with liquid nitrogen and extended along the circumference of a core, an outer metallic tube surrounding the circumference of the inner metallic tube at a distance, a cooling vessel of a terminal connecting box connected to the inner metallic tube and filled with liquid nitrogen, an insulation tube surrounding the circumference of the cooling vessel at a distance, an inner bellows tube connecting an end of the outer metallic tube to the cooling vessel, and an outer bellows tube spaced apart from the inner bellows tube and connecting the end of the outer metallic tube to the insulation tube.

Abstract: The present invention provides a thermal radiation shield (1) for a cryostat, formed of a plastic-metal hybrid material, which comprises a plastic component (23) and a conductive filler material (21) comprising a metal. The thermal radiation shield may be formed by injection moulding.

Abstract: A cryogen vessel (12) connected to a refrigerator chamber (15) arranged to house a cryogenic refrigerator (17). A controlled valve (32) is provided between the cryogen vessel (12) and the refrigerator chamber (15), and may be used to isolate the refrigerator chamber from the cryogen vessel.

Abstract: The present invention provides a sensor for detecting the build up of frozen deposits in a cryogen vessel housing a superconducting magnet, comprising a tensioned wire, a source of variable frequency alternating current and a voltage sensor. The tensioned wire is oriented perpendicular to the direction of the stray magnetic field produced by the superconducting magnet. By varying the frequency of the applied current, the resonant frequency of the tensioned wire may be detected as the frequency at which the voltage across the wire is a maximum. Any variation in the frequency or magnitude of the resonant peak may be interpreted as an indication of a frozen deposit hampering the free oscillation of the tensioned wire.

Abstract: In an apparatus and a method for detecting deposition of solid frost caused by air ingress into a cryogen vessel, a quartz crystal microbalance, that includes a crystal sensor, is placed within the cryogen vessel, and an actuating circuit actuates resonance of the crystal sensor, and detection equipment detects a change in the resonant characteristics of the crystal sensor caused by frost deposition on the crystal sensor, and signaling equipment indicates the detected change.

Abstract: A cryogenic propellant depot and sunshield are provided for operation in earth orbit to fuel or refuel other space vehicles. The sunshield is deployed to effectively mitigate solar radiation emanating from the earth and the sun thereby providing a long term storage solution for cryogenic fluids prone to boil-off. The depot has supporting subsystems to include station keeping equipment and communication equipment so that the depot can be independently controlled. Inflatable booms are used to deploy the sunshield in a desired pattern around the depot.

Abstract: A closed cycle Stirling cryogenic cooler, typically utilizing a noble gas (He or like) as a working fluid and containing a pneumatically driven expander interconnected with a low frequency pressure wave generator using a flexible transfer line or conduit, wherein the pressure wave generator includes a sealed gas discharge cavity containing the pressurised working fluid and a plurality of discharge electrodes which are electrically isolated, protrude through the walls of the cavity and are electrically connected to the high frequency pulse voltage supply, thus producing the glow discharge resulting in a cloud of cold plasma, making a so-called “plasmanized gas piston”.

Abstract: Cryogenic cooling apparatus comprises a chamber for containing coolant and a neck which opens into the chamber. A sleeve is provided which is located, when in use, within the neck. The apparatus includes a cooling element which is located exterior to the sleeve when the sleeve is in use. The sleeve comprises a heat transfer member adapted to cause the cooling element to remove heat from the interior of the sleeve through the use of heat transfer member.

Abstract: A cooling system employs a single-acting positive displacement bellows pump to transfer a cryogenic liquid such as liquid nitrogen from a storage dewar to a heat exchanger coupled to a measurement chamber of an instrument, wherein cooling takes place by vaporizing the liquid. Preferably, the capacity of the pump is greater than the maximum cooling requirement of the instrument, wherein both vapor resulting from vaporizing of the cryogenic liquid circulated through the heat exchanger and liquid that does not vaporize when circulated through the heat exchanger are returned to the storage dewar, wherein the vapor is subsequently vented from the dewar. Preferably, with the aid of a weir in a return line, the level of liquid in the heat exchanger is maintained full and constant, and the cooling demands are automatically met without the need for other control of the flow rate or level of the liquid.

Abstract: A vessel storing or transporting a low temperature fluid includes an insulating material disposed between an inner tank and an outer shell. The insulating material is volumetrically compressed so that it exerts a reaction force that is equal to or exceeds an ambient pressure at the outer shell and/or supports at least some of the weight of the inner tank. Manufacturing processes and methods of using the vessel also are described.

Abstract: A sample mounting apparatus for a cryo-cooler is provided having a housing with an outer wall surface for connecting to the cryo-cooler, and an inner wall surface. An inert gas is sealed inside the housing for thermal transfer, and a delicate mount is attached to the inner wall surface of the housing for supporting the sample and substantially preventing vibrations from being transferred to the sample from the cryo-cooler.

Abstract: A valve for controlling cryogen egress from a cryogen vessel has a housing having a low pressure side and a high pressure side with a fluid path defined between. A valve element is interposed between the low pressure side and the high pressure side of the housing. A mechanism is provided for holding the valve element against a valve seat. The mechanism has a cam shaft that is rotatable to displace the valve element from its seat to open the fluid path.

Abstract: A low temperature device has a low temperature container with an investigational opening. A material sample to that is to be examiner is mounted on a sample-holding device in the low temperature container. A sample that is fastened to the sample holding device can be cooled to the desired temperature using a cooling device, such as a pulse tube cooler, with a cold head that is inside the low temperature container. The sample holder is disposed in the low temperature container in such a way that the sample can be seen through the investigational opening. Because the investigational opening is flexible and not rigidly connected to the low temperature container, vibrations produced by the mechanical cooling device are prevented from being transferred to the investigational opening. Thus, a vibration-sensitive investigating and manipulating device can be coupled to the investigational opening without vibrations being transferred to the investigating and manipulating device.

Abstract: A high temperature superconducting (HTS) magnet coil disposed within a cryostat is configured with a thermo-siphon cooling system containing a liquid cryogen. The cooling system is configured to indirectly conduction cool the HTS magnet coil by nucleate boiling of the liquid cryogen that is circulated by the thermo-siphon in a cooling tube attached to a heat exchanger bonded to the outside surface of the HTS magnet coil. A supply dewar is configured with a re-condenser cryocooler coldhead to recondense boiloff vapors generated during the nucleate boiling process.

Abstract: A cryogenic medical device for delivery of subcooled liquid cryogen to various configurations of cryoprobes is designed for the treatment of damaged, diseased, cancerous or other unwanted tissues. The device is a closed or semi-closed system in which the liquid cryogen is contained in both the supply and return stages. The device is capable of generating cryogen to a supercritical state and may be utilized in any rapid cooling systems. As designed, the device comprises a number of parts including a vacuum insulated outer dewar, submersible cryogen pump, baffled linear heat exchanger, multiple pressurization cartridges, a return chamber, and a series of valves to control the flow of the liquid cryogen. The cryogenic medical device promotes the subcooling to any external cryogenic instrument.

Abstract: A cryogenic apparatus is provided having a nested thermally insulating structure, thermal links, a vacuum shroud, and a cryo-cooler. The nested thermally insulated structure holds a sample to be cooled while dampening the external vibrations caused by the cryo-cooler, the surrounding environment or cryo-cooler mounting surface. The thermal link is made of thermally conductive wires which connect the nested thermally insulated structure and the cryo-cooler thereby allowing the apparatus to reduce vibrations inherent in the operation of the cryo-cooler.

Abstract: A turret subassembly for use as part of a cryostat, the turret subassembly comprising a vent tube (32) housing an auxiliary vent (40); a refrigerator sock (34) for housing a refrigerator; a termination box (30) linking the vent tube and the refrigerator sock, and having an opening (52) in one wall (54); and means (38) for attachment of the turret subassembly to a cryogen vessel (12).