JP4117372B2 - Superconducting coil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a superconducting coil .
[0002]
[Prior art]
Realization of a large-scale strong magnetic field space in space is an indispensable technology especially for the observation of cosmic ray charged particles and the future of science and engineering experiments using various space environments. Superconducting technology is used to realize the above-mentioned strong magnetic field space, and establishment of a superconducting magnet that can generate a strong magnetic field is required.
[0003]
FIG. 1 is a perspective view schematically showing an entire conventional superconducting magnet, and FIG. 2 is an enlarged cross-sectional view showing a surrounding portion of the superconducting magnet shown in FIG. As shown in FIGS. 1 and 2, the conventional superconducting magnet is configured so that the outside of the superconducting coil 10 is held by a support cylinder 20.
[0004]
As is clear from FIG. 2, the superconducting coil 10 is constituted by winding a superconducting member 11 in four layers in the circumferential direction, and a tape-like electric insulating member 13 is inserted between each layer. Has been. The entire superconducting coil 10 shown in FIGS. 1 and 2 is covered with an epoxy resin (not shown), and the superconducting member 11 is integrated by curing the epoxy resin.
[0005]
[Problems to be solved by the invention]
In the conventional superconducting magnet shown in FIGS. 1 and 2, the strength of the superconducting coil 10 is not sufficient, and the form cannot be maintained by the electromagnetic force generated by itself. Therefore, it is essential to hold the superconducting coil 10 with the support cylinder 20 described above. For this reason, a lightweight and thin superconducting magnet could not be manufactured, and a superconducting magnet that could still be used to generate a large-scale strong magnetic field space in the space described above could not be realized.
[0006]
An object of the present invention is to provide a lightweight and thin superconducting magnet that can be used to generate a large-scale strong magnetic field space in outer space or the like.
[0007]
[Means for solving the problems]
In order to achieve the above object, the present invention provides:
A superconducting member composed of a superconducting element and an aluminum alloy stabilizing material arranged so as to surround the superconducting element in the cross-sectional direction is wound over multiple layers, and a thin shell is provided between each layer. The present invention relates to a superconducting coil.
[0008]
The superconducting strands can be preferably composed of NbTi / Cu superconducting strands, MgB ₂ superconducting strands, or bismuth-based high temperature superconducting strands. The NbTi / Cu superconducting wire may have a structure in which NbTi filaments are embedded in a copper matrix. Examples of the bismuth-based high-temperature superconducting wire include a superconducting wire having a composition of BiSrCaCuO.
[0009]
The superconducting coil of the present invention is composed of a composite superconducting member formed by surrounding a superconducting wire such as a NbTi / Cu superconducting wire with an aluminum alloy stabilizing material. In this case, a strong magnetic field is generated by the current flowing through the superconducting wire. However, since the superconducting wire is covered with an aluminum alloy stabilizing material, electromagnetic waves caused by the magnetic field generated by itself are generated. It does not deform beyond the elastic range due to the influence of force. As a result, the entire superconducting coil can be maintained in its own form without being deformed by the influence of the electromagnetic force.
[0010]
Accordingly, since the support cylinder for holding the superconducting coil as described above is not required, the superconducting coil of the present invention can be directly used as a superconducting magnet. The magnet can be reduced in weight and thickness. Therefore, the superconducting coil of the present invention can be used as a superconducting magnet for generating a large-scale strong magnetic field space in outer space.
[0011]
A plurality of superconducting coils formed by winding the superconducting member into a solenoid type are used, and the plurality of superconducting coils are arranged in pairs with each other, and the polarity of a pair of opposing superconducting coils is reversed. It is possible to form a superconducting coil structure in such a manner that the magnetic flux generated from the plurality of coils penetrates through the plurality of superconducting coils to form a closed loop.
[0012]
In this case , since the magnetic flux generated from the superconducting coil structure forms a closed loop, no magnetic dipole moment is formed in the entire superconducting coil structure. Therefore, even when the superconducting coil structure is arranged in outer space to generate a large-scale strong magnetic field space, interaction with geomagnetism can be eliminated, and the superconducting coil can be affected by torque. Absent. Therefore, according to the superconducting coil of the present invention, it is possible to stably generate a strong magnetic field space by arranging the superconducting coil in outer space without requiring special equipment. .
[0013]
Further, in at least one of the above-described superconducting coil structures, a superconducting spectrometer can be configured by arranging a particle detector therein. According to the superconducting coil structure , a strong magnetic field space can be formed without being affected by torque due to interaction with geomagnetism. Therefore, the charged particles can be deflected using this strong magnetic field, and the momentum can be measured using the particle detector.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail according to embodiments of the invention.
FIG. 3 is a perspective view schematically showing the whole superconducting coil of the present invention, and FIG. 4 is an enlarged cross-sectional view showing a surrounding portion of the superconducting coil shown in FIG. As can be seen from FIG. 4, the superconducting coil of the present invention comprises a solenoid type superconducting coil in which a superconducting member 31 is wound in two layers. A thin plate shell 32 is inserted between the superconductive members 31. By providing the thin plate shell 32, the superconducting member 31 can be reliably aligned, and the mechanical stability can be improved. Further, heat conduction in the axial direction X is facilitated, and conduction cooling of the entire superconducting coil by a cooling device (not shown) can be easily performed.
[0015]
The thin plate shell 32 is preferably made of at least one of aluminum, an aluminum alloy, and a composite plastic, for example.
[0016]
In addition, a tape-shaped electrical insulating member 33 is provided between the superconductive member 31 and the thin plate shell 32, and electrical insulation between the superconductive members 31 and between the superconductive member 31 and the thin plate shell 32 is provided. It is comprised so that it may hold | maintain reliably.
[0017]
As shown in FIG. 5, the superconducting member 31 is composed of a superconducting element wire 310 and an aluminum alloy stabilizing material 311 formed so as to surround the superconducting element wire 310. The superconducting strand 310 exhibits good superconducting properties, and generates a huge magnetic field by passing a current. On the other hand, the periphery of the superconducting wire 310 is covered with a high-strength aluminum alloy stabilizing material 311. Accordingly, the superconducting wire 310, that is, the superconducting member 31, can maintain its own form without being deformed by the aluminum alloy stabilizing material 311 even if it receives electromagnetic force due to the magnetic field generated by itself. become able to.
[0018]
Accordingly, as shown in FIGS. 3 and 4, the superconducting coil itself can be maintained without providing a conventional support cylinder. A superconducting magnet capable of generating a space can be configured.
[0019]
As described above, the superconducting element 310 is a bismuth-based high-temperature superconducting element having a composition of NbTi / Cu superconducting element, MgB ₂ superconducting element, or BiSrCaCuO in which an NbTi filament is embedded in a copper matrix. It can consist of lines etc. When the superconducting strand 310 is composed of an NbTi / Cu superconducting strand, specifically, it is preferable to adopt a configuration in which thousands of NbTi superconducting filaments are embedded in a copper matrix.
[0020]
The aluminum alloy stabilizing material 311 preferably contains at least 95% or more of Al, and more preferably contains 99% or more. And it is preferable to contain at least 1 type chosen from Ni, Zn, Si, Cu, and Mg besides Al. As a result, the strength of the aluminum alloy stabilizing material 311 can be easily increased, and even when a huge magnetic field is generated from the superconducting coil shown in FIGS. 3 and 4, the form can be easily maintained. It becomes like this.
[0021]
The diameter d of the superconducting wire 310 is preferably 2 mm or less, and more preferably 0.8 mm or less. Similarly, the diameter D of the superconductive member 31 is preferably 3 mm or less, and more preferably 1.2 mm or less. In addition, the diameter d of the superconducting wire 310 is preferably 0.2 mm or more, and more preferably 0.4 mm or more. Further, the diameter D of the superconductive member 31 is preferably 0.4 mm or more, and more preferably 0.6 mm or more. The superconducting member 31 may have a rectangular cross section with one side having the same dimensions as the diameter D. Accordingly, a huge magnetic field can be generated from the superconducting wire 310, that is, the superconducting member 31, and the strength of the superconducting member 31 can be maintained sufficiently high to prevent deformation of the superconducting coil. , Will be able to maintain its form.
[0022]
Figure 6 is a schematic diagram showing an example of a superconducting coil structure using the superconducting coil of the present invention, FIG. 7 is a schematic showing another example of the superconducting coil structure using the superconducting coil of the present invention FIG. The superconducting coil structure shown in FIG. 6 is configured so that two superconducting coils 30 shown in FIGS. 3 and 4 are prepared and the polarities of the superconducting coils 30 are opposite to each other. Similarly, in the superconducting coil structure shown in FIG. 7, four superconducting coils 30 shown in FIG. 3 and FIG. 4 are prepared, and these are separated into two pairs, and the polarities of each pair are opposite to each other. It is configured to make
[0023]
Therefore, in the superconducting coil structure shown in FIGS. 6 and 7, the magnetic fluxes generated by the superconducting coils 30 arranged vertically and horizontally form a closed loop as shown by arrows in the drawing, The magnetic dipole moment is not formed or canceled for the entire system. Therefore, even when the superconducting coil structure is arranged in outer space to generate a large-scale strong magnetic field space, it is possible to eliminate the interaction with the geomagnetism, and the superconducting coil has a torque generated by the interaction with the geomagnetism. Will not be affected. Therefore, according to the superconducting coil of the present invention, it is possible to stably generate a strong magnetic field space by arranging the superconducting coil in outer space without requiring special equipment. .
[0024]
FIG. 8 is a schematic view showing an example of a superconducting spectrometer using the superconducting coil structure . The superconducting spectrometer shown in FIG. 8 includes the superconducting coil structure shown in FIG. And the particle | grain detection system 40 is arrange | positioned inside the two superconducting coils 30 which make a pair mutually. As described above, Oite superconducting spectrometer shown in FIG. 8, magnetic fluxes each superconducting coil 30 is generated is as to form a closed loop in the direction indicated by the arrow. Therefore, the superconducting spectrometer shown in FIG. 8 does not form a magnetic dipole, and as a result, a strong magnetic field space can be formed without being affected by torque due to interaction with geomagnetism. Therefore, the charged particles can be deflected using this strong magnetic field, and the momentum can be measured using the particle detector.
[0025]
The particle detection system is appropriately designed and manufactured according to the type of charged particle to be measured.
[0026]
As mentioned above, the present invention has been described according to the embodiments of the present invention by showing specific examples. However, the present invention is not limited to the above contents, and all modifications and changes can be made without departing from the scope of the present invention. It can be changed.
[0027]
【The invention's effect】
As described above, according to the present invention, there is provided a superconducting coil that can be used as a lightweight and thin superconducting magnet that can be used to generate a large-scale strong magnetic field space in outer space. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an entire conventional superconducting magnet.
FIG. 2 is an enlarged cross-sectional view showing a surrounding portion of the superconducting magnet shown in FIG.
FIG. 3 is a perspective view schematically showing the entire superconducting coil of the present invention.
4 is an enlarged cross-sectional view showing a surrounding portion of the superconducting coil shown in FIG. 3. FIG.
FIG. 5 is a cross-sectional view of a superconductive member.
FIG. 6 is a schematic view showing an example of a superconducting coil structure using the superconducting coil of the present invention.
FIG. 7 is a schematic view showing another example of a superconducting coil structure using the superconducting coil of the present invention.
FIG. 8 is a schematic view showing an example of a superconducting spectrometer using the superconducting coil of the present invention.
[Explanation of symbols]
10, 30 Superconducting coil 11, 31 Superconducting member 13, 33 Electrical insulating member 20 Support cylinder 32 Thin shell 310 Superconducting wire 311 Aluminum alloy stabilizing material 40 Particle detection system

Claims (8)

A superconducting wire, wound over the superconducting member Te sectional direction odor consisting of an aluminum alloy stabilizing material disposed so as to surround the periphery of the superconducting wire to a multilayer,
Between each layer, provided the thin shell to improve the mechanical stability, characterized in that to be able to self-hold to the generated electromagnetic force, the superconducting coil.   The superconducting coil according to claim 1, wherein the superconducting wire is a NbTi / Cu superconducting wire in which a NbTi filament is embedded in a copper matrix. The superconducting coil according to claim 1, wherein the superconducting wire is an MgB ₂ superconducting wire.   The superconducting coil according to claim 1, wherein the superconducting wire is a bismuth-based high-temperature superconducting wire.   The superconducting coil according to any one of claims 1 to 4, wherein an Al content in the aluminum alloy stabilizing material is 95% or more.   The superconducting coil according to claim 5, wherein the aluminum alloy stabilizing material includes at least one selected from Ni, Zn, Si, Cu and Mg. The superconducting coil according to claim 1, wherein the thin plate shell is made of at least one of aluminum, an aluminum alloy, and a composite plastic.   The superconducting coil according to any one of claims 1 to 7, wherein the superconducting member is wound into a solenoid type.

Images