WO2021014959A1 - Aimant supraconducteur du type à refroidissement par conduction - Google Patents

Aimant supraconducteur du type à refroidissement par conduction Download PDF

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Publication number
WO2021014959A1
WO2021014959A1 PCT/JP2020/026506 JP2020026506W WO2021014959A1 WO 2021014959 A1 WO2021014959 A1 WO 2021014959A1 JP 2020026506 W JP2020026506 W JP 2020026506W WO 2021014959 A1 WO2021014959 A1 WO 2021014959A1
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Prior art keywords
superconducting
cooling
cooling plate
conduction
coil
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PCT/JP2020/026506
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English (en)
Japanese (ja)
Inventor
古賀　智之
洋之 渡邊
伸夫 岩城
翔太郎 中島
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株式会社日立製作所
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Publication of WO2021014959A1 publication Critical patent/WO2021014959A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/04—Cooling
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/80—Constructional details
    • H10N60/81—Containers; Mountings

Definitions

  • the present invention relates to a conduction-cooled superconducting magnet.
  • Superconducting magnets are used in a variety of applications, such as accelerators and magnetic resonance imaging (MRI).
  • the cooling method of the superconducting magnet includes immersion cooling in which a body to be cooled such as a superconducting coil is immersed in a refrigerant to cool it, and a refrigerator or the like attached to the body to be cooled via a heat transfer body.
  • conduction cooling There is conduction cooling.
  • conduction cooling it is important to efficiently cool the superconducting coil and the coil outlet whose connection portion becomes a heat generation source when energized.
  • the contact surface is made of a thermally conductive insulator, and the cooling block connected to the refrigerator and the coil outlet are thermally contacted to generate heat at the connection portion.
  • the contact surface is made of a thermally conductive insulator, and the cooling block connected to the refrigerator and the coil outlet are thermally contacted to generate heat at the connection portion.
  • Patent Document 1 a structure in which a heat transfer plate thermally connected to the cooling stage of the refrigerator is attached to the outer peripheral surface of the superconducting coil via a flange
  • Patent Document 2 A structure is known in which a cooling plate thermally connected to a cooling stage of a refrigerator is attached to an end surface of a superconducting coil via a heat transfer body (see Patent Document 3).
  • Patent Document 1 Patent Document 2, and Patent Document 3 independently disclose a structure in which a coil outlet and a superconducting coil are cooled by conduction cooling.
  • the superconducting coil is usually arranged in the Crystat, which is an adiabatic vacuum vessel, it is difficult to realize two or more of the structures shown in the patent documents at the same time due to spatial restrictions (problem). ).
  • the superconducting wire drawn from the coil outlet of the superconducting coil is routed to the power lead as a crossover wire and wired. In order to ensure the thermal stability of the superconducting magnet, this crossover has a problem that it is preferable to be cooled as in the case of the superconducting coil and the coil opening.
  • the length of the cooling path to the refrigerator differs between one coil and the other coil. Therefore, when this structure is used, there is a problem (problem) that a temperature difference may occur between the two superconducting coils.
  • the present invention has been made in view of such a conventional situation, and provides a conduction-cooled superconducting magnet capable of stable operation by eliminating a temperature difference between two paired superconducting coils.
  • the task (purpose) is to do.
  • the present invention was configured as follows. That is, in the conduction cooling type superconducting magnet of the present invention, two superconducting coils arranged coaxially to form a pair, a first cooling plate for cooling the superconducting coil, and two superconducting coils.
  • a second cooling plate for cooling the crossover and a cooling stage for cooling the second cooling plate are provided, and the first cooling plate is evenly distributed in the middle portion of the two paired superconducting coils. It is characterized by being arranged.
  • the superconducting coil, the coil outlet, and the crossover can be cooled at the same time, and the cooling from the cooling stage thermally connected to the refrigerator to the two superconducting coils can be cooled.
  • the lengths of the paths are almost equivalent. Therefore, it is possible to provide a conduction-cooled superconducting magnet that operates stably by eliminating the temperature difference between the superconducting coils.
  • FIG. 1 is a diagram showing an example of a cross-sectional structure on a cut surface including a central axis Z of a conduction-cooled superconducting magnet 1 according to the first embodiment of the present invention.
  • the conduction-cooled superconducting magnet 1 has two superconducting coils 11A and 11B, a first cooling plate 12A, a second cooling plate 12B, a coil outlet 13, a crossover 14, a power lead 15, and a cooling stage 16. , A refrigerator or a heat exchanger 17 connected to the refrigerator.
  • the heat exchanger is provided in the refrigerator and is a part of the refrigerator (17), and the heat exchanger (17) is a device different from the refrigerator and is in contact with the refrigerator. There are cases where it is.
  • the two superconducting coils 11A and 11B are wound around the same axis (central axis Z) of the cylindrical winding frame (bobbin) 18.
  • the first cooling plate 12A is provided in contact with the superconducting coil 11A and the superconducting coil 11B, and cools both the superconducting coil 11A and the superconducting coil 11B. Further, the first cooling plate 12A is evenly provided in the intermediate portion between the two paired superconducting coils 11A and the superconducting coil 11B.
  • the first cooling plate 12A is wound on the same axis (central axis Z) of the winding frame 18 via the superconducting coils 11A and 11B. That is, the first cooling plate 12A is composed of a cylindrical structure that surrounds the two superconducting coils 11A and 11B from the outer peripheral side.
  • the superconducting coil 11A and the superconducting coil 11B are composed of a solenoid coil in which a superconducting wire (31: FIG. 2) is wound around a cylindrical winding frame 18 to form a winding.
  • a superconducting wire 31: FIG. 2
  • FIG. 1 since the superconducting wire at the beginning of winding and the superconducting wire at the end of winding are shown with respect to one coil outlet 13, they are schematically shown as two conducting wires.
  • the coil outlets 13 of the two superconducting coils 11A and 11B are substantially the same position in the circumferential direction of the central axis Z, and the two coils are in the axial direction. It is located at the end on the plane of symmetry. Since the coil outlets 13 of the two superconducting coils 11A and 11B are located at close distances in this way, the crossover wire 14 and the second cooling plate 12B are located at the same location on the two coil outlets 13. You can connect all at once with. The details of the structure in the vicinity of the coil outlet 13 will be described later with reference to FIG.
  • the first cooling plate 12A contacts the second cooling plate 12B and exchanges heat.
  • the second cooling plate 12B is in contact with the cooling stage 16 via a curved L-shaped plate-like structure in the region 100, and is thermally connected.
  • the cooling stage 16 is in contact with the refrigerator or the heat exchanger 17 connected to the refrigerator and is thermally connected.
  • the superconducting coils 11A and 11B are cooled from the refrigerator or the heat exchanger 17 connected to the refrigerator via the cooling stage 16, the second cooling plate 12B, and the first cooling plate 12A.
  • the crossover line 14 is also cooled by the second cooling plate 12B via insulation (electrical insulation).
  • crossover wire 14 connects the lead wires drawn from the superconducting coils 11A and 11B at the coil outlet 13 to the power lead 15. With this configuration, current is supplied to and controlled from the superconducting coils 11A and 11B from an external device (not shown) arranged at the tip of the power lead 15.
  • an external device not shown
  • FIG. 2 is a diagram showing an example of a structure of the coil outlet 13 and its vicinity in the conduction-cooled superconducting magnet 1 according to the first embodiment of the present invention.
  • the coil outlet 13 includes a superconducting wire 31, stabilized copper 32, and a support structure 33.
  • the superconducting coils 11A and 11B, the winding frame 18, and the central axis Z in FIG. 2 correspond to those in FIG.
  • the superconducting wire 31 is drawn from the superconducting coil 11A and the superconducting coil 11B, respectively.
  • the superconducting wires 31 drawn from the superconducting coil 11A and the superconducting coil 11B are shown as one for convenience of the notation in the figure, but in reality, FIG. As shown in the two thick lines in the vicinity of the coil opening 13 of the above, there are two each.
  • the stabilized copper 32 is produced by passing the current flowing through the superconducting wire 31 through the stabilized copper 32 when the superconducting wire 31 undergoes a quench (phase transition from the superconductor to the normal conductor). It is provided to reduce sudden current changes and temperature changes. Further, the stabilized copper 32 has a plate shape and is provided with a groove (not shown) for routing the superconducting wire 31.
  • the support structure 33 is for supporting the superconducting wire 31 and the stabilized copper 32 from the winding frame 18.
  • the superconducting wire 31 is connected to the superconducting wire 41 (FIG. 3) described later. Further, the stabilized copper 32 is connected to the stabilized copper 42 (FIG. 3) described later.
  • the superconducting wire 31 is wired in a groove provided in the stabilized copper 32 and is mechanically and electrically connected to the stabilized copper 32 by soldering. Further, the anti-coil side end portion of the stabilized copper 32 has a terminal structure provided with a bolt hole for making an electrical connection with the crossover wire 14. Further, an insulating plate (not shown) having sufficient thermal conductivity is sandwiched between the stabilized copper 32 and the support structure 33, and bolted (near the indicator line 201). At this time, an insulating cylindrical collar (not shown) is inserted between the bolt and the bolt hole so that the stabilized copper 32 and the support structure 33 do not electrically conduct with each other through the bolt. Further, for the same reason, an insulating washer (not shown) is inserted in the contact surface between the stabilized copper 32 and the head of the bolt. Further, the support structure 33 is bolted to the winding frame 18 (near the indicator line 202).
  • the coil outlet 13 shown in FIG. 2 heat is generated due to electric resistance at the solder connection portion of the stabilized copper 32 and the superconducting wire 31 and the stabilized copper 32 when energized.
  • one end of the support structure 33 is connected to the second cooling plate 12B of FIG. Further, the second cooling plate 12B is connected to the cooling stage 16 (FIG. 1).
  • the coil outlet 13 is cooled by the refrigerator or the heat exchanger 17 connected to the refrigerator via the second cooling plate 12B and further via the cooling stage 16, and the heat generated by the above-mentioned electric resistance is generated. However, the heat is efficiently removed (removed).
  • FIG. 3 is a diagram showing an example of the structure of the crossover line 14 in the conduction-cooled superconducting magnet 1 according to the first embodiment of the present invention.
  • the crossover wire 14 includes a superconducting wire (lead wire) 41 and a stabilized copper 42.
  • the superconducting wire 41 in FIG. 3 electrically connects between the superconducting coils 11A and 11B shown in FIG. 1 and the power lead 15.
  • the stabilized copper 42 in FIG. 3 is provided with a groove for routing the superconducting wire 41, and is formed in a plate shape and an L shape.
  • the superconducting wire 41 is wired in the groove provided in the stabilized copper 42 and is mechanically and electrically connected to the stabilized copper 42 by soldering.
  • the stabilized copper 42 and the second cooling plate 12B are bolted together with an insulating material having sufficient thermal conductivity sandwiched between them.
  • an insulating cylindrical collar 44 is inserted between the bolt 43 and the bolt hole 46 so that the stabilized copper 42 and the second cooling plate 12B do not electrically conduct with each other through the bolt 43. ..
  • an insulating washer 45 is inserted into the contact surface between the stabilized copper 42 and the head of the bolt 43.
  • the crossover line 14 is electrically connected to the coil outlet 13 at one end on the superconducting coil (11A, 11B) side. Further, the crossover line 14 is electrically connected to the power lead 15 at the other end. Therefore, when the superconducting coils 11A and 11B are energized, heat is generated due to the electric resistance at the connection portion at the end of the crossover wire 14. Further, when the superconducting wire 41 (FIG. 3) wired to the crossover wire 14 is damaged due to distortion or a defect inside the wire rod, the current diverges to the stabilized copper 42 (FIG. 3) at the damaged portion. Therefore, resistance heat generation is generated by this bypass current. However, as shown in FIG.
  • the second cooling plate 12B is thermally connected to the refrigerator or the heat exchanger 17 connected to the refrigerator via the cooling stage 16. Therefore, the crossover line 14 thermally connected to the second cooling plate 12B is cooled via the second cooling plate 12B, and the resistance of the contact portion and the heat generated by the bypass current are efficiently removed. Be heated.
  • the superconducting wire 41 shown in FIG. 3 is bent at a bent portion of the L-shaped stabilized copper 42 with a radius equal to or larger than an appropriate minimum bending radius so as not to be damaged by bending strain.
  • the bending radius of the bent portion of the stabilized copper 42 also has a structure that follows the bending radius of the superconducting wire 41.
  • the superconducting wire 41 is uniformly cooled through the stabilized copper 42 without the superconducting wire 41 being separated from the stabilized copper 42 at the bent portion (region 100: FIG. 3).
  • the superconducting wire 41 receives an electromagnetic force when energized by the magnetic field created by the superconducting coils (11A, 11B).
  • the structure becomes strong against the electromagnetic force generated by the magnetic field. There is.
  • the number of crossovers 14 and the number of power leads 15 are, for example, three each. Is.
  • Two superconducting wires 31 (FIGS. 2 and 1) are drawn from both ends of the superconducting coils 11A and 11B shown in FIG. 1, for a total of four (2 ⁇ 2). Of the total of four superconducting wires 31, one (two in total) that is one end of each coil in the superconducting coils 11A and 11B is connected to each of the two crossover wires 14. Then, the two power leads 15 are pulled out as they are through the two crossovers 14.
  • a total of two superconducting wires 31 which are the other ends of the respective coils in the superconducting coils 11A and 11B are electrically connected to each other and are shared by one. This common one is connected to the remaining one crossover wire 14, and is led out to the remaining one power lead 15 via the crossover wire 14.
  • Cylindrical structure of the first cooling plate 12A The cylindrical structure of the first cooling plate 12A shown in FIG. 1 is installed so as to be in thermal contact with the outer periphery of the superconducting coils 11A and 11B, and is bolted to the winding frame (bobbin) 18 of the superconducting coils 11A and 11B. Has been done. With this structure, the superconducting coils 11A and 11B are in contact with the first cooling plate 12A over one round of the cylindrical shape, and the second cooling plate 12B, the cooling stage 16 and the refrigerator are refrigerated from the outer peripheral surface via the first cooling plate 12A. It is cooled by the path of the heat exchanger 17 connected to the machine or the refrigerator.
  • the superconducting coils 11A and 11B generate heat by quenching (phase transition from the superconductor to the normal conductor) due to various factors, and this heat generation is also generated by the first cooling plate 12A, the second cooling plate 12B, and the like.
  • the heat is efficiently removed by the refrigerator or the heat exchanger 17 connected to the refrigerator via the cooling stage 16.
  • the superconducting coils 11A and 11B are housed in a cryostat (not shown) which is an adiabatic vacuum container.
  • the power lead 15 shown in FIG. 1 is for electrically connecting the low temperature vacuum in the cryostat in which the superconducting coils 11A and 11B are installed and the normal temperature atmosphere outside the cryostat, and from the normal temperature side to the low temperature side.
  • Superconductors high-temperature superconductors are partially used in order to reduce the amount of heat invading the surface.
  • the crossover wire 14 has a sufficient length so that the superconducting coils 11A and 11B and the power lead 15 can be installed apart from each other. Further, although not clearly shown in FIG. 1, the power lead 15 is also cooled by the refrigerator or the heat exchanger 17 connected to the refrigerator via the second cooling plate 12B or the cooling stage 16. It has become.
  • a motor of the refrigerator is usually used in the upper part of the refrigerator or the heat exchanger 17 connected to the refrigerator in FIG. 1, and there is a possibility that the motor may operate abnormally due to the influence of the magnetic field. Therefore, the refrigerator or the heat exchanger 17 connected to the refrigerator is sufficiently far from the superconducting coils 11A and 11B so as not to be affected by the magnetic field created by the superconducting coils 11A and 11B, like the power lead 15. It is installed with a place. Second cooling made of a material with sufficiently high thermal conductivity in order to transfer heat over a long distance between the refrigerator or the heat exchanger 17 connected to the refrigerator and the superconducting coils 11A and 11B. Plate 12B is used. The second cooling plate 12B has a necessary cross-sectional area so that the temperature difference between the cooling stage 16 and the superconducting coils 11A and 11B can be appropriately suppressed.
  • the two superconducting coils 11A and 11B, the coil outlet 13, and the crossover 14 are all the first cooling plate 12A, the first. 2 It is thermally connected to the cooling stage 16 connected to the refrigerator or the heat exchanger 17 connected to the refrigerator via the cooling plate 12B, and these parts (11A, 11B, 13, 14) are simultaneously connected. It is possible to cool. Further, in the coil outlet 13, since the conducting wire (superconducting wire 31) drawn from the superconducting coils 11A and 11B and the crossing wire 14 are electrically connected, heat is generated (heat generation part) due to the connection resistance when energized. ..
  • the heat generating portion is cooled by conduction cooling. This is possible, and the superconducting magnet (conducting cooling type superconducting magnet 1) can be stably operated (operated).
  • the crossover wire 14 is a lead wire that electrically connects the coil outlet 13 to the vicinity of the cooling stage 16 connected to the refrigerator or the heat exchanger 17 connected to the refrigerator.
  • the crossover wire 14 and the cooling stage 16 are thermally connected by the second cooling plate 12B via insulation to conduct the crossover wire 14. It has a structure that can be cooled by cooling.
  • the crossover line 14 may be a superconductor, a normal conductor, or both. When the crossover wire 14 is a superconductor, the thermal stability of the superconductor wire 41 can be maintained by cooling. When the crossover wire 14 is a normal conductor, heat cannot be transferred to the superconducting wire 31 or the superconducting coils 11A and 11B by removing the heat generated by the resistance generated when the power is applied.
  • the crossover wire 14 and the superconducting coils 11A and 11B Therefore, there is heat intrusion due to heat transfer. However, since the crossover wire 14 is cooled by the structure, heat intrusion into the superconducting coils 11A and 11B can be suppressed.
  • the first cooling plate 12A is in contact with the superconducting coils 11A and 11B, and is evenly arranged in the intermediate portion between the two paired superconducting coils 11A and 11B. Therefore, the lengths of the cooling paths from the cooling stage 16 thermally connected to the refrigerator or the heat exchanger 17 connected to the refrigerator to the superconducting coil 11A and the superconducting coil 11B are almost equal. The temperature difference between the two superconducting coils 11A and 11B can be suppressed to a very small size.
  • the superconducting magnet (conducting cooling type superconducting magnet 1) provided with the two paired superconducting coils 11A and 11B can be stably operated. That is, it is possible to provide a conduction-cooled superconducting magnet 1 capable of stable operation.
  • the superconducting coils 11A and 11B have been described as having the shape of a solenoid coil, but the superconducting coils 11A and 11B are not limited to the solenoid coil. For example, it may be an ellipse, a rectangle, or a race track shape.
  • the material of the superconducting wire used for the superconducting coils 11A and 11B has not been described, but either a low-temperature superconductor or a high-temperature superconductor may be used.
  • low-temperature superconductors include NbTi and Nb 3 Sn.
  • high-temperature superconductors include MgB 2 , or bismuth-based superconductors such as Bi 2 Sr 2 CaCu 2 O 8+ ⁇ (Bi2212) and Bi 2 Sr 2 Ca 2 Cu 3 O 10+ ⁇ (Bi2223).
  • rare earth-based superconductors such as REBa 2 Cu 3 O 7- ⁇ (RE123, RE: rare earth element).
  • RE123, RE rare earth element
  • the shape of the superconducting wire may be any of a round wire, a square wire, a flat wire, and a tape wire.
  • the power lead 15 and the crossover line 14 are directly connected to each other.
  • a conductive flexible lead (not shown) for absorbing (relaxing) mechanical displacement may be used between the connection between the power lead 15 and the crossover line 14 in FIG. 1.
  • the superconducting coils 11A and 11B, the first cooling plate 12A, the second cooling plate 12B, the coil outlet 13, and the crossover line 14 are integrally displaced by cooling shrinkage.
  • the power lead 15 is connected to a structure having a temperature higher than that of each of the above-mentioned parts (11A, 11B, 12A, 12B, 13, 14). Therefore, a mechanical variation (displacement difference) occurs between the power lead 15 and each of the above-mentioned parts (11A, 11B, 12A, 12B, 13, 14).
  • the superconducting coils 11A and 11B, the first cooling plate 12A, the second cooling plate 12B, the coil outlet 13, the crossover wire 14, and the power lead are generated by the acceleration applied from the outside.
  • a displacement different from that of 15 will occur and a displacement difference will occur.
  • the above-mentioned displacement difference is absorbed by the conductive flexible lead, and the crossover wire 14 or the power
  • the flexible lead for conductivity one having high electric conductivity and good flexibility is used. For example, copper braid is used.
  • the crossover wire 14 shown in FIG. 3 is provided with a superconducting wire (lead wire) 41, and the electrical conducting wire is described as the superconducting wire 41.
  • the electrical conducting wire is described as the superconducting wire 41.
  • the resistance value of the conducting wire is set to be a sufficiently low value.
  • the crossover line 14 shows an example in which the crossover line 14 is bent. However, depending on the arrangement of the magnets, the bent portion of the crossover line 14 shown in FIGS. 1 and 3 may be eliminated. Further, two or more places may be provided.
  • the superconducting wire 41 and the stabilized copper 42 are divided and connected between them by a flexible lead for conduction. There is also a configuration to do.
  • the number of the crossovers 14 and the number of the power leads 15 are each three. Then, the superconducting wires 31 of each coil (superconducting coils 11A and 11B) are electrically connected to each other and shared into one, and then are drawn out to the power lead 15 via the crossover wire 14.
  • the number of crossovers and power leads is not limited to the above number.
  • the lead wires (superconducting wires 31) of the superconducting coils 11A and 11B may be shared by two, and the number of crossover wires 14 and the number of power leads 15 may be two each. Good.
  • the number of crossover wires 14 and the number of power leads 15 may be 4 each without sharing all the leader wires.
  • the first cooling plate 12A is composed of a cylindrical structure that surrounds the two superconducting coils 11A and 11B from the outer peripheral side with reference to FIG.
  • the cylindrical structure of the first cooling plate 12A may be a divided structure. In this case, the split portions are thermally connected by a flexible lead for heat transfer.
  • ⁇ Structure of the second cooling plate 12B In the first embodiment, in the conduction-cooled superconducting magnet 1 of FIG. 1, two superconducting plates 12B and one refrigerator or a heat exchanger 17 connected to the refrigerator 17 are used.
  • the set of the conducting coils 11A and 11B is cooled as one set, but the structure is not necessarily limited to this. For example, by modifying a part of the structure of the second cooling plate 12B, a plurality of sets of superconductivity are provided by one second cooling plate 12B and one refrigerator or a heat exchanger 17 connected to the refrigerator.
  • the coils (11A, 11B) may be cooled at the same time.
  • one or more sets of superconducting coils (11A, 11B) may be cooled by one second cooling plate 12B and a plurality of refrigerators or heat exchangers 17 connected to the refrigerators.
  • a plurality of first cooling plates (12A) evenly provided in the middle portion between the two superconducting coils (11A) forming a plurality of pairs and the superconducting coil (11B) are common. They are connected to each other and shared (shared) via a second cooling plate (12B). Further, a plurality of coil outlets 13 are provided so that the superconducting wire (31) is drawn from each of the plurality of sets of the two superconducting coils (11A, 11B).
  • a plurality of or common power leads (15) for supplying a current to a plurality of sets of superconducting coils (11A, 11B) are provided.
  • a plurality of crossover wires (14) are provided, each of which is wired from the superconducting wire (31) of the plurality of coil outlets (13) to the plurality of or common power leads (15).
  • a common second cooling plate (12B) for cooling the plurality of first cooling plates (12A) and the plurality of crossovers (14) is provided.
  • a cooling stage (16) for cooling the second cooling plate (12B) is provided.
  • the plurality of crossovers (14) are wired while being cooled by a common second cooling plate (12B) via insulation.
  • a plurality of sets of two paired superconducting coils (11A, 11B) can be cooled together.
  • Refrigerator and conduction-cooled superconducting magnet >>
  • the refrigerator may not be provided in the conduction-cooled superconducting magnet 1.
  • the conduction cooling type superconducting magnet may be provided with a refrigerator. That is, there is also a configuration in which a refrigerator including a heat exchanger (17) is provided in a conduction cooling type superconducting magnet, and the refrigerator (heat exchanger) and the cooling stage (16: FIG. 1) are thermally directly connected. ..

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Abstract

La présente invention comprend : deux bobines supraconductrices 11A, 11B qui forment une paire en étant positionnées coaxiales, une première plaque de refroidissement 12A qui refroidit les bobines supraconductrices, des sorties de bobine 13 jusqu'auxquelles un fil supraconducteur est tiré depuis chacune des deux bobines supraconductrices, un conducteur d'alimentation 15 qui fournit du courant aux bobines supraconductrices, un fil de raccordement 14 qui est routé depuis les fils supraconducteurs des sorties de bobine jusqu'au conducteur d'alimentation, une seconde plaque de refroidissement 12B qui refroidit la première plaque de refroidissement et le fil de raccordement, et un étage de refroidissement 16 qui refroidit la seconde plaque de refroidissement. La première plaque de refroidissement est positionnée de manière uniforme dans une partie intermédiaire de la paire de bobines supraconductrices.
PCT/JP2020/026506 2019-07-22 2020-07-07 Aimant supraconducteur du type à refroidissement par conduction WO2021014959A1 (fr)

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JP2019134239A JP2021019106A (ja) 2019-07-22 2019-07-22 伝導冷却型超伝導磁石
JP2019-134239 2019-07-22

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JP2016058608A (ja) * 2014-09-11 2016-04-21 公益財団法人鉄道総合技術研究所 高温超電導電流リード

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07142237A (ja) * 1993-11-22 1995-06-02 Toshiba Corp 超電導磁石装置
JPH0878737A (ja) * 1994-08-31 1996-03-22 Mitsubishi Electric Corp 超電導マグネット
JPH10189328A (ja) * 1996-12-27 1998-07-21 Mitsubishi Electric Corp 超電導マグネット
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JP2016058608A (ja) * 2014-09-11 2016-04-21 公益財団法人鉄道総合技術研究所 高温超電導電流リード

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