Abstract: Techniques for improving reliability of a superconducting fault current limiting system (SCFCL) are provided. In one particular exemplary embodiment, the techniques may be realized with a superconducting fault current limiting system (SCFCL) comprising: an input current lead and an output current lead, each current lead coupled to a power distribution/transmission network; a container; a superconductor contained in the container; a shunt disposed outside the container and in parallel with the superconductor; a cryogenic system configured to provide coolant into the container; and at least one sensor disposed near and configured to monitor at least one operating condition of at least one of the input current lead and the output current lead, the superconductor, and the shunt.

Abstract: A cryocooler system and a superconducting magnet apparatus having the cryocooler system include a cryocooler having a cool stage that cools a heat shielding unit and a thermal inertia that thermally contacts the cool stage of the cryocooler and has a high heat capacity. The cryocooler system reduces a temperature-increasing rate in a current lead by using the thermal inertia member when the temperature in the current lead is increased due to heat generated when an electrical current applied to a superconducting coil is ramped-up or ramped-down.

Abstract: An arrangement with a superconductive electrical direct current cable system is specified which includes at least one direct current transmission element (4) composed of two phase conductors which are insulated relative to each other, and a cryostat suitable for conducting a cooling agent, in which the direct current cable system is arranged. The cryostat is composed of at least one metal pipe which is surrounded by a circumferentially closed layer with thermally insulating properties. Each of the two phase conductors (5, 6) is composed of several superconductive elements (9) which are combined into a unit. Between the two phase conductors (5, 6) is mounted a separating layer (7) of insulating material, and the two phase conductors (5, 6), including the separating layer (7) are surrounded by a sheath (8) of insulating material for forming a direct current transmission element (4).

Abstract: A superconducting machine for supporting a coolant feed line for superconducting machines includes a hollow shaft that can be connected to the superconducting machine in a first region, the coolant feed line being disposed in the interior thereof for feeding the coolant from the refrigeration unit to the superconducting machine. A magnetic support is disposed in the first region of the hollow shaft so that a radial and thus motion-damping, centering force is exerted on the coolant feed line. The magnetic support has a first and a second magnetic cylinder, wherein the first magnetic cylinder is disposed on the outer jacket of the coolant feed line and the second magnetic cylinder is disposed on the inner face of the hollow shaft. The first magnetic cylinder is a cylinder made of highly electrically conductive material having ohmic resistance.

Abstract: An apparatus 2 comprising a cryogenic chamber 4 and a galvanic input interface 6 to the cryogenic chamber 4 configured to receive a lower amplitude electric current 8. A converter 10 is located within the cryogenic chamber 4 and configured to convert the lower amplitude electric current 8, provided by the galvanic input interface 6, to a higher amplitude electric current 12 for supply to a load 14 within the cryogenic chamber 4. A controller 16 is configured to control the converter 10 and to detect the onset of quench by comparing the duration of the charge/discharge cycle of the convertor with a stored value. The controller 16 may also compare an instantaneous value of load current with a stored value of load current.

Abstract: An apparatus and a method for cooling a super conducting machine are disclosed, in which at least two condenser areas each make thermal contact with a cold head, and in which the at least two condenser areas each have a connecting line, via which the at least two condenser areas are connected fluidically to an evaporator area. A liquid cooling fluid can be moved or pumped from at least one condenser area into the evaporator area by way of a temperature difference, and a pressure difference associated therewith, in the at least two condenser areas.

Abstract: A superconducting cable is provided. The superconducting cable includes a core part including a former disposed at the center of the core part, one or more superconducting conductive layers with each electric phase disposed at the outside of the former in a radial directions, a insulating layer disposed at the outside of each the conductive layer in a radial direction and a shielding layer disposed at the outermost of the insulating layer; and a cryostat disposed at the outside of the core part in a radial direction with first space being interposed therebetween, having a vacuum part disposed therein and electrically wired to neutral pole (N pole).

Abstract: The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system.

Abstract: A demountable current lead unit and a superconducting magnet apparatus employing the same include an inserting module that is demountably inserted into a superconducting magnet apparatus and electrode leads electrically connected to a superconducting coil and cooling pipes disposed in the respective electrode leads; a service module including a power supply source for supplying a current to the electrode leads, a refrigerant storage tank for supplying a refrigerant to the cooling pipe, and a controller for controlling a flow of the refrigerant to the cooling pipe; and a transmission pipe line for connecting the inserting module and the service module.

Abstract: Superconductor cable having a plurality of flat, tape-shaped ribbon superconductor wires assembled to form a stack having a rectangular cross section, the stack having a twist about a longitudinal axis of the stack. Multiple superconductor cables including twisted stacked-cables of the flat-tape-shaped superconductor wires, and power cable comprising the twisted flat-tape stacked cables are disclosed. Superconducting power cable disposed within and separated from an electrical insulator with a space passing cryo-coolant between the superconducting cable and insulator is also disclosed.

Abstract: A persistent current switch is presented. One embodiment of the persistent current switch includes a vacuum chamber. The persistent current switch also includes a cooling unit disposed within the vacuum chamber and configured to circulate a coolant between a first layer and a second layer of the cooling unit. Further, the persistent current switch includes a winding unit disposed on at least one of the first layer and the second layer of the cooling unit and configured to switch the persistent current switch from the first mode to the second mode when a temperature associated with the winding unit is below a threshold temperature. In addition, the persistent current switch includes a heating unit thermally coupled to the winding unit and configured to enhance the temperature of the winding unit above the threshold temperature to transition the persistent current switch from the second mode to the first mode.

Abstract: A Mössbauer spectroscopy system for applying an external magnetic field at cryogenic temperature using a refrigerator is provided. A Mössbauer spectrum can be obtained by applying the external magnetic field while changing the temperature of a superconducting magnet and a sample from a cryogenic temperature using the refrigerator, the external magnetic field can be applied while cooling the superconducting magnet using the refrigerator without the need for use of a liquid helium, thereby saving the operation cost according to consumption of the liquid helium, the mounting of a sample which it is desired to measure is easy, thereby minimizing a possibility that a worker will be exposed to gamma rays, and a convenience in use of a user can be improved.

Abstract: A magnetic resonance imaging apparatus has a plurality of cooling pipes disposed while being spaced apart from each other along a longitudinal length of the coil assembly, a first manifold connected to a lower end of the plurality of cooling pipes to distribute and supply a coolant to the plurality of cooling pipes, and a second manifold connected to an upper end of the plurality of cooling pipes to be supplied with the coolant from the plurality of cooling pipes, thereby able to evenly cool off the coil assembly in a longitudinal direction thereof.

Abstract: An energy efficient data center incorporating superconducting power transmission cables coupled with cryogenically cooled semiconductor inverters and converters, used to supply power to cryogenically operated or room-temperature computers and servers. Other options and features include a lighting system whose performance is enhanced by the cold temperatures, fiber optic connections operated at cryogenic temperatures, integrated renewable energy power sources, advanced energy storage technologies, cryogenically operated computers, and a number of other cryogenic hardware. The operating temperature of the cryogenic components can be anywhere in the range between 0 K and 200 K, with other components operating above 200 K.

Abstract: A superconductive electromagnet apparatus and a magnetic resonance imaging apparatus including the superconductive electromagnet apparatus are provided. The superconductive electromagnet apparatus includes a thermal anchor, a cryogenic cooling device which cools the thermal anchor, and at least one connecting ring into which the thermal anchor is inserted and a plurality of wires which are connected to the connecting ring.

Abstract: Techniques for sub-cooling in a superconducting (SC) system is disclosed. The techniques may be realized as a method and superconducting (SC) system comprising at least one insulated enclosure configured to enclose at least a first fluid or gas and a second fluid or gas, and at least one superconducting circuit within the at least one insulated enclosure. The superconducting (SC) system may be sub-cooled using at least the first fluid or gas.

Abstract: This invention relates to a superconducting fault current limiter, including: an input segment of an input transformer core and an output segment of an output transformer, each segment having a first end and a second end; a length of superconductor which forms a winding around the input segment and a winding around output segment, wherein the windings are connected in series to form a closed loop; a cryostat in which the superconductor is housed; wherein each end of the input and output segments are exposed to the exterior of the cryostat.

Abstract: A cryostat (1) with a magnet coil system including superconductors for the production of a magnet field B0 in a measuring volume (3) has a plurality of radically nested solenoid-shaped coil sections (4, 5, 6) and which are electrically connected in series, at least one of which being an LTS section (5, 6) with a conventional low temperature superconductor (LTS) and at least one of which being an HTS section (4) including a high temperature superconductor (HTS), wherein the magnet coil system is located in a helium tank (9) of the cryostat (1) along with liquid helium at a helium temperature TL<4 K. The apparatus is characterized in that heating means are provided which always keep the HTS at an increased temperature TH>TL and TH>2.2 K. The cryostat in accordance with the invention can maintain the HTS section over a long period of time in a reliable manner.

Abstract: A cooling system includes a first section of high temperature superconducting (HTS) cable configured to receive a first flow of coolant and to permit the first flow of coolant to flow therethrough. The system may further include a second section of high temperature superconducting (HTS) cable configured to receive a second flow of coolant and to permit the second flow of coolant to flow therethrough. The system may further include a cable joint configured to couple the first section of HTS cable and the second section of HTS cable. The cable joint may be in fluid communication with at least one refrigeration module and may include at least one conduit configured to permit a third flow of coolant between said cable joint and said at least one refrigeration module through a coolant line separate from said first and second sections of HTS cable.

Abstract: An International Organization for Standardization (ISO) shipping container 10 includes a cryogenic refrigeration system 14 for cryogenically cooling superconducting magnet(s) 12A, 12B during transit. The cryogenic refrigeration system 14 monitors the temperature and/or pressure of the superconducting magnet(s) and circulates a refrigerant to the superconducting magnet(s) to maintain cryogenic temperatures in superconducting coils. A power supply 16, provided by a transportation vehicle, connects to the cryogenic refrigeration system via a power inlet 20 which is accessible from the exterior of the shipping container. The superconducting magnet(s) are suspended within the shipping container which is then loaded onto the transportation vehicle. The external power supply is connected to the cryogenic refrigeration system such that refrigerant is circulated to a cold head 22A, 22B of each superconducting magnet.

Abstract: A cooling system and method for cooling superconducting magnet coils are provided. One magnet system for a superconducting magnet device includes a cooling system having at least one coil support shell, a plurality of superconducting magnet coils supported by the at least one coil support shell and a plurality of cooling tubes thermally coupled to the at least one coil support shell. The magnet system also includes a cryorefrigerator system fluidly coupled with the plurality of cooling tubes forming a closed circulation cooling system.

Abstract: The invention offers a container for a superconducting apparatus and a superconducting apparatus. The container mounts in it a superconducting coil as a member including a superconductor. The container is provided with a vacuum insulated container 20 as a housing case made of resin and provided with an opening, a lead electrode 50 as a metal member positioned such that it passes through the opening, and a combination of connecting members 63 and 65 that covers the opening, that connects the lead electrode 50 to the vacuum insulated container 20, and that is provided with a curved portion as a thermal-stress-alleviating portion. Having the foregoing structure, the container can suppress the development of separation and cracks at the portion where the metal member passes though and is fixed to the wall of the container that mounts in it a superconductor such as a superconducting coil.

Abstract: When cooling a superconducting magnet for use in a magnetic resonance imaging (MRI) device, a two-stage cryocooler (42) employs a first stage cooler (52) to cool a working gas (e.g., Helium, Hydrogen, etc.) to approximately 25 K. The working gas moves through a tubing system by convection until the magnet (20) is at approximately 25K. Once the magnet (20) reaches 25 K, gas flow stops, and a second stage cooler (54) cools the magnet (20) further, to about 4 K.

Abstract: The present invention is an apparatus to confine a plurality of charged particles that include a plurality of coil heads that includes a plurality of superconducting coils, a bobbin and a plurality of insulation material and a plurality of support legs that include 2 support legs that are in conductive contact with each coil head and 2 support legs that are in physical contact with each coil head. The apparatus includes a base with a cryocooler inlet and a vacuum flange and a conductive cold element that is in the interior of the base, the conductive cold element is attached to the conductive rods of the 2 support legs that are in conductive contact with each coil head and the superconducting coils.

Abstract: A superconductor cooling system has: a first superconductor; a first cooling conductor used for cooling the first superconductor; a first cooling unit configured to cool the first cooling conductor to a first temperature; and a current lead configured to supply a current to the first superconductor. Here, a part of a path of the current is formed of a second superconductor. The superconductor cooling system further has: a second cooling conductor used for cooling the second superconductor; a second cooling unit configured to cool the second cooling conductor to a second temperature; and a first thermal conduction switch connected between the first cooling conductor and the second cooling conductor to ON and OFF heat transfer between the first cooling conductor and the second cooling conductor.

Abstract: A transformer including: a transformer housing having an interior, a superconducting wire winding disposed within the housing interior, a dry dielectric medium in contact with a superconducting wire winding, and a temperature control device in heat exchange communication with the dry dielectric medium, adapted to utilize a gaseous medium for controlling the temperature of the superconducting wire winding.

Abstract: A superconducting fault current limiter (SCFCL) includes a cryogenic tank defining an interior volume, a superconductor disposed in the interior volume, and a voltage detector configured to detect a voltage drop across the superconductor and provide a voltage signal representative of the voltage drop. This voltage detector enables real time monitoring of a condition of the superconductor during steady state operation of the SCFCL. If the voltage drop exceeds an acceptable voltage drop, corrective action such as maintenance, repair, and/or replacement may be taken.

Abstract: A system for cooling superconducting materials used for magnetization of magnets disposed within a cylindrical structure, the system including a first tubing system for allowing a cooling gas to interact with a high-field strength superconducting material to thermosiphon-cool the high-field strength superconducting material, a second tubing system for allowing a cooling gas to interact with a low-field strength superconducting material to thermosiphon-cool the low-field strength superconducting material, and a cooling gas in liquefied form configured to flow through the first tubing system and/or the second tubing system. An outlet of the first tubing system and an outlet of the second tubing system are located at a same location on a surface of the cylindrical structure. A method for cool superconducting materials used for magnetization of magnets disposed within a cylindrical structure is also disclosed.

Abstract: A superconducting electrical cable is specified, which is surrounded by a cryostat (3), which comprises two concentric metallic tubes (4, 5) which enclose thermal insulation between them and is used to carry a cooling medium. The cable has at least one superconductor (1), which is composed of superconducting material, as well as a normal electrical conductor (7), which is composed of normally conductive material and is electrically conductively connected to the superconductor. The normal conductor (7) is arranged outside of but resting on the cryostat (3).

Abstract: An arrangement for electrically conductively connecting two electrical units by means of a bipolar high voltage direct current transmission, in which between the units are arranged at least two electrical direct current cables constructed as superconductive cables. The superconductive cables are mounted separately from each other in a cryostat (1,2) suitable for conducting a cooling agent which has at least one metal pipe provided with a thermal insulation. The cryostats (1,2) are connected with at least one of their ends to a cooling plant (7) supplying the cooling agent and a pipeline (3) is placed parallel to the two cryostats (1,2). The pipeline (3) is connected at both its ends to the two cryostats (1,2) through valves (15,16,17) which are closed during uninterrupted operation and, in the case of an interruption at one of the superconductive cables, the pipeline (3) serves with the then open valves for conducting the cooling agent intended for the cryostat of the impaired cable.

Abstract: A contact element (4) provided with an electrical connection element (4A), and intended for a superconducting cable unit arranged in a refrigerant, has an electrically conductive plate intended to be borne mechanically by the unit and to be electrically connected to the cable. The plate has through slots (4E, 4E?, 4E?) intended to form thermal conduction chicanes.

Abstract: A superconducting magnet system for high power microwave source focusing and cyclotron electronic apparatus is provided, wherein, the superconducting magnet comprises an inner superconducting main coil, an outer superconducting main coil, two end compensation coils, a regulating coil and a central regulating coil. These coils are formed by coiling Nb3Sn/Cu superconducting wire. The superconducting magnet can operate off-line through solid nitrogen formed by a cryocooler and high-pressure nitrogen. The superconducting magnet and the superconducting switch constitute a closed loop, thereby achieving magnetic field stability, without outside electromagnetic interference. The superconducting magnet system can provide a magnetic field having special spatial distribution and high stability.

Abstract: Provided is a natural gas processing facility for the liquefaction or regasification of natural gas. The facility includes a primary processing unit, e.g., refrigeration unit, for warming natural gas or chilling natural gas to at least a temperature of liquefaction. The facility also has superconducting electrical components integrated into the facility. The superconducting electrical components incorporate superconducting material so as to improve electrical efficiency of the facility by at least one percent over what would be experienced through the use of conventional electrical components. The superconducting electrical components may be one or more motors, one or more generators, one or more transfonners, switch gears, one or more electrical transmission conductors, variable speed drives, or combinations thereof.

Abstract: A terminal apparatus for a superconducting cable system connects an overhead transmission cable or power appliance such as a breaker in an ambient temperature state to a superconducting cable through which power is transmitted at a cryogenic temperature. The terminal apparatus has: a refrigerant tub which is connected to the end of a superconducting cable and is filled with a refrigerant; a vacuum heat insulating container that surrounds the exterior of the refrigerant tub; a current lead having one end connected to the end portion of the superconducting cable and the other end connected to the overhead transmission cable or power appliance through the refrigerant tub and the vacuum heat insulating container; and a superconducting fault current limiter installed at a center portion of the current lead in the interior of the refrigerant tub to limit fault current.

Abstract: A cryostat has a tank for accommodation of a coolant and at least one superconducting magnet coil to generate a magnetic field. The tank has on a top side at least one tower pipe for filling the coolant and/or for venting vaporized coolant. In order to immediately indicate if and when sealing of filling pipes and discharging pipes with (for example) ice has occurred, a pressure sensor is connected via a pressure sensor pipe with the inside of the tank.

Abstract: A superconductive electric cable is provided in which a cable core is arranged in a cryostat, where the cable core is composed of three phase conductors arranged concentrically around an inner cooling duct, with an electric insulation arranged between the phase conductors, and where the cryostat is surrounded by an electric insulation, which is surrounded by a neutral conductor of normally conductive materials. In this cable, a neutral conductor or a screening is arranged only outside of the cryostat, and is formed by normally conductive material which surrounds the cryostat as a common neutral conductor, where an insulating material is arranged between this neutral conductor and the cryostat.

Abstract: A low-noise cooling apparatus is provided. The cooling apparatus includes an outer container and an inner container. A thermal insulation layer in a vacuum state is disposed between the outer container and the inner container. The inner container includes a Dewar containing a liquid refrigerant, a prepolarization coil arranged inside the inner container and immersed in the liquid refrigerant, a pick-up coil immersed in the liquid refrigerant, and a superconducting quantum interference device (SQUID) electrically connected to the pick-up coil and immersed in the liquid refrigerant. The prepolarization coil is made of a superconductor.

Abstract: A cooling system includes a first section of high temperature superconducting (HTS) cable configured to receive a first flow of coolant and to permit the first flow of coolant to flow therethrough. The system may further include a second section of high temperature superconducting (HTS) cable configured to receive a second flow of coolant and to permit the second flow of coolant to flow therethrough. The system may further include a cable joint configured to couple the first section of HTS cable and the second section of HTS cable. The cable joint may be in fluid communication with at least one refrigeration module and may include at least one conduit configured to permit a third flow of coolant between said cable joint and said at least one refrigeration module through a coolant line separate from said first and second sections of HTS cable. Other embodiments and implementations are also within the scope of the present disclosure.

Abstract: A supported superconducting magnet includes a superconducting magnet arranged within an outer vacuum container and a support structure bearing the weight of the superconducting magnet against a support surface. The support structure includes a tubular suspension element located between the magnet and the support surface, the tubular suspension element retaining the magnet in a fixed relative position with reference to the outer vacuum container by means of complementary interface surfaces arranged to transmit the weight of the superconducting magnet to the support structure. The tubular suspension element is arranged about a generally vertical axis, and supports a solenoidal magnet structure which is arranged about a generally horizontal axis.

Abstract: A connection arrangement for connecting together two superconductor cables, each having a central conductor comprising at least one superconductive part, a dielectric layer surrounding said central conductor, a shield surrounding said dielectric layer and a cryogenic enclosure surrounding said shield, the connection arrangement has an electrical splicing device for splicing together the central conductors and stripped dielectric layers of the corresponding shields. This connection arrangement has a covering made of semi-conductive material that is placed between the two shield ends and an electrical connection device for connecting together the two shield ends, the connection device surrounding the covering, being contained in the cryogenic enclosure, and comprising two junction elements each electrically and mechanically joined to a respective one of the shield ends, and an electrical splicing arrangement for splicing together the two junction elements.

Abstract: A cryostat (1) with a magnet coil system including superconductors for the production of a magnet field B0 in a measuring volume (3) has a plurality of radially nested solenoid-shaped coil sections (4, 5, 6) and which are electrically connected in series, at least one of which being an LTS section (5, 6) with a conventional low temperature superconductor (LTS) and at least one of which being an HTS section (4) including a high temperature superconductor (HTS), wherein the magnet coil system is located in a helium tank (9) of the cryostat (1) along with liquid helium at a helium temperature TL. The apparatus is characterized in that a chamber (11) is provided within which the HTS sections (4) are held having an internal portion with a sufficiently low pressure such that helium located therein at a temperature of TL is gaseous. The cryostat in accordance with the invention can be utilized to maintain HTS coil sections over a long period of time in a reliable fashion.

Abstract: A cryostat (1) with a magnet coil system including superconductors for the production of a magnet field B0 in a measuring volume (3) has a plurality of radially nested solenoid-shaped coil sections (4, 5, 6) which are electrically connected in series, at least one of which being an LTS section (5, 6) with a conventional low temperature superconductor (LTS) and at least one of which being an HTS section (4) including a high temperature superconductor (HTS), wherein the LTS section (5, 6) is located in a first helium tank (9) of the cryostat (1) along with liquid helium at a helium temperature TL<4 K. The apparatus is characterized in that the HTS section (4) is disposed radially within the LTS section (5, 6) in a separate helium tank (19) of the cryostat (1) having normal liquid helium and is separated from the LTS section (5, 6) by means of at least one wall disposed between the two helium tanks.

Abstract: The arrangement method of superconducting wires of a superconducting cable, includes: in a case where a refrigerator is installed at one of terminal structures provided on both sides of a superconducting cable, and a cooling fluid is passed through the superconducting cable by a pump for cooling, setting the numbers of superconducting wires of sections of the superconducting cable installed between the terminal structures on both the sides to be different depending to temperatures of the sections, wherein the numbers of superconducting wires are increased from the section of the superconducting cable having the lowest temperature to the section thereof having the highest temperature while maintaining a current-carrying capability.

Abstract: In a cylindrical superconducting magnet system for magnetic resonance imaging, primary superconducting coils are positioned within an outer vacuum chamber. A thermal radiation shield surrounds the primary superconducting coils. A gradient coil assembly is axially aligned with the primary superconducting coils. A mechanical support assembly is radially positioned outside of the primary superconducting coils and is mechanically attached to the gradient coil assembly by mechanical attachments which pass through through-holes through the outer vacuum chamber and the thermal radiation shield.

Abstract: A superconducting magnet assembly and method of cooling a superconducting magnet assembly.

Abstract: An arrangement is specified for current limiting having a superconducting cable (SK) which is arranged in a cryostat (KR) which has an outer wall which comprises two metallic tubes (1, 2) which are arranged concentrically with respect to one another and between which vacuum insulation (3) is incorporated. The cryostat (KR) surrounds a free space (FR) for a coolant to pass through, in which free space (FR) the superconducting cable (SK) is arranged. It also has an inner wall (IW) which surrounds a cylindrical cavity (HR) and likewise comprises two metallic tubes (4, 5) which are arranged concentrically with respect to one another, between which vacuum insulation (6) is incorporated, and which is located within the outer wall (AW) and is separated therefrom by the free space (FR). The superconducting cable (SK) which has a superconducting conductor, a dielectric surrounding the same and a superconducting screen which is arranged above the same, is wound in a helical shape around the inner wall (IW).

Abstract: A cooling system and method for cooling superconducting magnet coils are provided. One magnet system for a superconducting magnet device includes a cooling system having at least one coil support shell, a plurality of superconducting magnet coils supported by the at least one coil support shell and a plurality of cooling tubes thermally coupled to the at least one coil support shell. The magnet system also includes a cryorefrigerator system fluidly coupled with the plurality of cooling tubes forming a closed circulation cooling system.

Abstract: A precooling device for a thermal radiation shield of a superconducting magnet has a mechanical heat conductive member in contact with the thermal radiation shield of a superconducting magnet, for cooling the thermal radiation shield down to a second temperature before the second stage of precooling of the superconducting magnet, this second temperature being below the temperature of the thermal radiation shield after a first stage of precooling of the superconducting magnet. A superconducting magnet and magnetic resonance imaging equipment embody such a precooling device. The precooling device reduces the external radiation heat onto a cryogen vessel, thereby reducing the consumption of cryogen.

Abstract: In a cold superconducting joint, a joint cup is provided. Lengths of superconducting filaments are placed in the joint cup. A superconducting material fills the joint cup in contact with the superconducting filaments and in thermal and mechanical contact with a pipe carrying a cryogen. The pipe extends into the joint cup and the superconducting material extends around the pipe within the joint cup.

Abstract: An annular end piece for a cylindrical vacuum vessel, comprising a metal end piece (42); an outer decorative shell (44) spaced away from a surface of the metal end piece; and a layer of solid foam filling the space between the metal end piece and the outer decorative shell.