JP3356459B2 - Superconducting coil - Google Patents
Superconducting coilInfo
- Publication number
- JP3356459B2 JP3356459B2 JP13237892A JP13237892A JP3356459B2 JP 3356459 B2 JP3356459 B2 JP 3356459B2 JP 13237892 A JP13237892 A JP 13237892A JP 13237892 A JP13237892 A JP 13237892A JP 3356459 B2 JP3356459 B2 JP 3356459B2
- Authority
- JP
- Japan
- Prior art keywords
- purity aluminum
- composite
- superconducting
- copper
- specific resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は超電導コイルに係り、特
に安定化材として高純度アルミニウム材を使用し、高磁
界で優れた安定性を維持することのできる超電導コイル
の改良に関する。The present invention relates relates to a superconducting coil, particularly using high-purity aluminum material as a stabilizing material, to be that the improvement of superconducting coils of maintaining excellent stability at high fields.
【０００２】[0002]
【従来の技術】従来、大型の超電導機器、例えば核融
合、エネルギー貯蔵、加速器等の大型超電導マグネット
に使用される超電導々体として、多芯構造の超電導線と
安定化材を半田で接合した複合超電導々体が知られてい
る。2. Description of the Related Art Conventionally, as a superconducting body used in large superconducting magnets such as large superconducting equipment such as nuclear fusion, energy storage, and accelerators, a composite in which a multi-core superconducting wire and a stabilizing material are joined by soldering. Superconductors are known.
【０００３】上記の複合超電導々体の安定化材として
は、銅またはアルミニウムが一般的に使用されている
が、銅はアルミニウムに比較して強度が大きく、また超
電導フィラメントとの強度差が小さいために加工性に優
れ、かつ半田付け性が良好である反面、極低温下での比
抵抗が大きく、これに対してアルミニウムは、銅に比べ
て極低温下での比抵抗が小さい利点を有するものの、強
度が小さく、かつ超電導フィラメントとの強度差が大き
いために加工し難い上、半田付け性が悪く超電導線と複
合化するのに問題があった。[0003] Copper or aluminum is generally used as a stabilizing material for the above composite superconductor, but copper has a higher strength than aluminum and a small difference in strength from the superconducting filament. Although it has excellent workability and good solderability, it has a large specific resistance at cryogenic temperatures, whereas aluminum has the advantage of low specific resistance at cryogenic temperatures compared to copper. In addition, since the strength is small and the difference in strength from the superconducting filament is large, it is difficult to process, and the solderability is poor, so that there is a problem in combining with the superconducting wire.
【０００４】しかしながら、高純度のアルミニウムは、
高磁界での磁気抵抗効果の増加が銅に比較して小さく、
従って高磁界下での比抵抗が小さくなり安定性に優れる
利点を有するため、高磁界用の導体として、超電導特性
の上からは安定化材としてアルミニウムを使用すること
が有利である。However, high-purity aluminum is
The increase in magnetoresistance effect in high magnetic fields is small compared to copper,
Therefore, it has an advantage that the specific resistance under a high magnetic field is reduced and the stability is excellent. Therefore, it is advantageous to use aluminum as a stabilizing material from the viewpoint of superconducting properties as a conductor for a high magnetic field.
【０００５】上述のアルミニウムの難点を克服するため
に、一般にはアルミニウムを銅で被覆した複合体として
超電導線と複合化することが行われている。[0005] In order to overcome the above-mentioned difficulties of aluminum, it has been common practice to combine aluminum with a superconducting wire as a composite coated with copper.
【０００６】このようなアルミニウム安定化超電導々体
としては、モノリス型、ハウジング型、撚線型あるいは
複合型の複合超電導々体が種々検討されてきている。As such an aluminum-stabilized superconductor, various composite superconductors of a monolith type, a housing type, a stranded wire type or a composite type have been studied.
【０００７】上記のモノリス型の超電導々体は、銅マト
リックスを有する超電導線の内部に銅被覆アルミニウム
材を配置した構造を有するものであり、ハウジング型の
超電導々体は、断面凹状の２つの銅ハウジングを対向さ
せて配置し、この内部に銅マトリックスを有する超電導
線と銅被覆アルミニウム材を配置した構造を有し、また
撚線型の超電導々体は、銅マトリックスを有する超電導
線と銅被覆アルミニウム線を撚り合わせた構造を有す
る。さらに複合型の超電導々体は、銅マトリックスを有
する超電導線を撚り合わせ、これを圧縮成型した線材と
銅被覆アルミニウム材を複合化したものである。The above-mentioned monolithic superconductor has a structure in which a copper-coated aluminum material is disposed inside a superconducting wire having a copper matrix. The housing-type superconductor has two copper conductors having a concave cross section. A superconducting wire having a copper matrix and a copper-coated aluminum material are disposed inside the housing, and a superconducting wire having a copper matrix and a copper-coated aluminum wire are used for the stranded wire superconductor. Have a twisted structure. Further, the composite superconductor is obtained by twisting a superconducting wire having a copper matrix, and compressing and molding the resulting wire into a copper-coated aluminum material.
【０００８】以上の複合超電導々体においては、超電導
線と銅被覆アルミニウム材とは一般に半田で接合される
ことにより一体化されている。In the above composite superconductor, the superconducting wire and the copper-coated aluminum material are generally integrated by being joined with solder.
【０００９】高純度アルミニウムの比抵抗は、本発明者
等の実験結果によれば、ゼロ磁場で銅の比抵抗に比較し
て著しく小さく、かつ２〜６Ｔ（テスラ）の範囲でほぼ
一定の値を有しており、これに対して銅の比抵抗は、ゼ
ロ磁場でアルミニウムの比抵抗に比較して著しく大きい
上、２〜６Ｔ（テスラ）の範囲でその値が急激に上昇
し、高磁場、例えば６Ｔ（４．２Ｋ）で高純度アルミニ
ウムの約１０倍以上の比抵抗を示す（特願平３−３９８
５２号）。According to the experimental results of the present inventors, the specific resistance of high-purity aluminum is significantly smaller than the specific resistance of copper at zero magnetic field, and has a substantially constant value in the range of 2 to 6 T (tesla). On the other hand, the specific resistance of copper is significantly larger than the specific resistance of aluminum at zero magnetic field, and its value rises rapidly in the range of 2 to 6 T (tesla). For example, at 6T (4.2K), the specific resistance is about 10 times or more higher than that of high-purity aluminum (Japanese Patent Application No. 3-398).
No. 52).
【００１０】従って、安定化材として銅の一部を銅被覆
アルミニウム材に置き換えることにより、複合超電導々
体の合成比抵抗を著しく低下させることが可能となるこ
とが予測される。Therefore, it is expected that by replacing a part of copper with a copper-coated aluminum material as a stabilizing material, it will be possible to remarkably reduce the composite specific resistance of the composite superconductor.
【００１１】[0011]
【発明が解決しようとする課題】しかしながら、高純度
アルミニウム材を銅で被覆し、これを超電導線と単に複
合化した状態、あるいは超電導線の内部に単に配置した
だけでは、それぞれ単独の比抵抗から計算した合成比抵
抗よりもその値が著しく大きくなるという現象が測定さ
れている。例えば、円形断面の高純度アルミニウム線の
外側にニオブの拡散バリアを配置し、さらに多芯超電導
線および安定化銅を順次配置した構造の複合超電導々体
においては、極低温で高純度アルミニウム本来の比抵抗
特性が得られず、高純度アルミニウムと銅の中間の比抵
抗特性を示すことが判明している（第３７回低温工学発
表会Ｂ１−４）。However, if a high-purity aluminum material is coated with copper and this is simply combined with a superconducting wire or simply placed inside a superconducting wire, each of them has a single specific resistance. A phenomenon has been measured in which the value is significantly larger than the calculated combined specific resistance. For example, in a composite superconductor having a structure in which a diffusion barrier of niobium is arranged outside a high-purity aluminum wire having a circular cross-section, and a multi-core superconducting wire and stabilizing copper are sequentially arranged, the original high-purity aluminum at cryogenic temperature is used. It has been found that a specific resistance characteristic cannot be obtained and a specific resistance characteristic intermediate between high-purity aluminum and copper is exhibited (37th Low Temperature Engineering Conference B1-4).
【００１２】従って、高純度アルミニウム材を用いた効
果が発揮できないという問題があった。本発明は上記の
問題を解決するためになされたもので、安定化材として
高純度アルミニウムを用いた場合の極低温下での比抵抗
特性を著しく向上させ、特に高磁界で優れた安定性を維
持することのできる超電導コイルを提供することをその
目的とする。Therefore, there is a problem that the effect of using the high-purity aluminum material cannot be exhibited. The present invention has been made in order to solve the above-described problem, and when using high-purity aluminum as a stabilizing material, significantly improves the specific resistance characteristics at extremely low temperatures, and in particular, provides excellent stability at high magnetic fields. to provide a superconducting coil that can of maintaining its intended.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、多芯構造の超電導線と安定化材とを接合
した複合超電導々体において、高純度アルミニウム材と
同符号のホール係数を有する材料で高純度アルミニウム
材を被覆した複合材を安定化材として用いるものであ
る。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a composite superconductor in which a multi-core superconducting wire and a stabilizing material are joined to each other in a hole having the same sign as that of a high-purity aluminum material. A composite material obtained by coating a high-purity aluminum material with a material having a coefficient is used as a stabilizing material.
【００１４】上記発明における高純度アルミニウム材と
同符号のホール係数を有する材料としては、ベリリウ
ム、インジウム、マグネシウム、カドミウム、鉄、モリ
ブデン、鉛、タンタル、タングステン、錫、亜鉛および
これ等の合金があり、特にベリリウム、インジウム、マ
グネシウムおよびこれ等の合金は極低温、高磁界下で高
純度アルミニウムと同じ正のホール係数を有するため、
これを用いることが好ましい。Examples of the material having a Hall coefficient having the same sign as the high-purity aluminum material in the above invention include beryllium, indium, magnesium, cadmium, iron, molybdenum, lead, tantalum, tungsten, tin, zinc and alloys thereof. In particular, beryllium, indium, magnesium and their alloys have the same positive Hall coefficient as high-purity aluminum at cryogenic temperatures and high magnetic fields,
It is preferable to use this.
【００１５】上記の複合超電導々体においては、安定化
材を矩形断面を有する高純度アルミニウム材の外側に高
純度アルミニウムと同じ正のホール係数を有する材料を
被覆して形成することが好ましい。この場合、安定化材
の幅広面が磁場の方向と平行となるようにして使用する
ことにより、合成比抵抗をより低下させることができ
る。In the above composite superconductor, the stabilizing material is preferably formed by coating a material having the same positive hole coefficient as high-purity aluminum on the outside of a high-purity aluminum material having a rectangular cross section. In this case, the combined specific resistance can be further reduced by using the stabilizer such that the wide surface is parallel to the direction of the magnetic field.
【００１６】以上から本発明の超電導コイルは、矩形状
に成形された多芯構造の超電導線と、矩形状の断面を有
する高純度アルミニウム材の外周面にベリリウム、イン
ジウム、マグネシウムまたはこれ等の合金を被覆した複
合材とを接合し、高純度アルミニウム材の幅広面がコイ
ルの軸方向あるいはコイルによって形成される磁場の方
向に平行になるように配置し、かつ超電導線を高純度ア
ルミニウム材に対してコイルの軸方向あるいはコイルに
よって形成される磁場の方向に垂直になる位置に配置し
て巻回したものである。As described above, the superconducting coil of the present invention has a rectangular shape.
And the superconducting wire of the molded multi-core structure, the outer peripheral surface of the high-purity aluminum material with a rectangular cross section beryllium, indium, and a composite material coated with magnesium or this like alloy bonded to a high purity aluminum The superconducting wire shall be arranged so that the wide surface of the material is parallel to the axial direction of the coil or the direction of the magnetic field formed by the coil , and
To the axial direction of the coil or to the coil
So that it is positioned perpendicular to the direction of the magnetic field
It is wound.
【００１７】特に、矩形断面を有する高純度アルミニウ
ム材や高純度アルミニウムテープを安定化材として使用
する場合には、幅方向のみに高純度アルミニウム材と同
符号のホール係数を有する材料を接合した複合材を用い
てコイルを形成することにより著しくその合成比抵抗を
低下させることが可能となる。In particular, when a high-purity aluminum material or a high-purity aluminum tape having a rectangular cross section is used as a stabilizing material, a composite material in which a material having the same sign as the high-purity aluminum material in the width direction is joined. By forming a coil using a material, the combined specific resistance can be significantly reduced.
【００１８】[0018]
【作用】上記構成の複合超電導々体および超電導コイル
においては、高純度アルミニウム材の外側に高純度アル
ミニウム材と同符号のホール係数を有する材料で被覆し
た複合材からなる安定化材を用いることにより、超電導
々体の合成比抵抗を著しく低下させることができるが、
この現象は、超電導々体の合成比抵抗が高純度アルミニ
ウム材と被覆材のホール係数および外部磁界に対する配
置に依存するという本発明者等の知見に基づいている。In the composite superconducting body and the superconducting coil having the above construction, a stabilizing material comprising a composite material coated with a material having the same sign as the high-purity aluminum material on the outside of the high-purity aluminum material is used. , Can greatly reduce the combined specific resistance of the superconductors,
This phenomenon is based on the knowledge of the present inventors that the combined specific resistance of the superconductor depends on the Hall coefficient of the high-purity aluminum material and the coating material and the arrangement with respect to an external magnetic field.
【００１９】図５は高純度アルミニウム材と銅被覆高純
度アルミニウム材の極低温（４．２Ｋ）における比抵抗
の外部磁界に対する依存性を示したもので、同図におい
てＡは外径φ１．４４６mmの円形断面の高純度アルミニ
ウム材を、またＢは外径φ１．６１mmで面積比Ａｌ：Ｃ
ｕ＝１：０．２３９の円形断面の銅被覆高純度アルミニ
ウム材を示し、ともに通電電流１００Ａで測定した結果
である。この場合、線径による比抵抗の変動が小さい結
果も得られている。即ち、高純度アルミニウム材に銅を
被覆することにより、その合成比抵抗は理論値より著し
く増大する。FIG. 5 shows the dependence of the specific resistance of a high-purity aluminum material and a copper-coated high-purity aluminum material at an extremely low temperature (4.2 K) on an external magnetic field. In FIG. 5, A denotes an outer diameter of 1.446 mm. B is a high-purity aluminum material with a circular cross section, and B has an outer diameter of 1.61 mm and an area ratio of Al: C.
The figure shows a copper-coated high-purity aluminum material having a circular cross section of u = 1: 0.239, both of which are results measured at a current of 100 A. In this case, a result in which the variation of the specific resistance due to the wire diameter is small is also obtained. That is, by coating a high-purity aluminum material with copper, the combined specific resistance is significantly increased from the theoretical value.
【００２０】一方、図６は矩形断面の複合材についての
極低温（４．２Ｋ）における比抵抗の外部磁界に対する
依存性を示したもので、同図中のＣおよびＣ´は断面
０．４×１．９（mm）の高純度アルミニウム材１の幅広
面に厚さ０．０５mmの銅２、２´を接合した場合を示
し、また同図中のＤおよびＤ´は断面０．５×２．０
（mm）の高純度アルミニウム材３に厚さ０．０５mmの銅
４を被覆した場合を示している。これらの測定値の外部
磁界に対する試料の位置関係を、それぞれ図７（ａ）、
（ｂ）および図８（ａ）、（ｂ）に示した。この結果か
ら矩形断面の複合材の場合、高純度アルミニウム材の幅
広面が外部磁界の方向に平行になるように配置すること
により、その合成比抵抗が低下し、特に外部磁界に対し
て垂直方向に銅が配置されていない試料Ｃ´の合成比抵
抗は高純度アルミニウムの比抵抗に近い値を示すことが
明らかである。On the other hand, FIG. 6 shows the dependence of the specific resistance of the rectangular cross-section composite material at an extremely low temperature (4.2 K) on the external magnetic field. C and C 'in FIG. A case in which copper 2, 2 'having a thickness of 0.05 mm is joined to a wide surface of a high-purity aluminum material 1 having a size of 1.9 (mm), and D and D' in FIG. 2.0
(Mm) shows a case where the high-purity aluminum material 3 is coated with copper 4 having a thickness of 0.05 mm. The positional relationship of the sample to an external magnetic field of these measurements, each view 7 (a),
(B) and FIGS. 8 (a) and 8 (b). From this result, in the case of a composite material having a rectangular cross section, by arranging the wide surface of the high-purity aluminum material so as to be parallel to the direction of the external magnetic field, the combined specific resistance is reduced, and particularly in the direction perpendicular to the external magnetic field. It is clear that the composite specific resistance of the sample C ′ in which no copper is disposed shows a value close to the specific resistance of high-purity aluminum.
【００２１】以上の結果は、高純度アルミニウムと銅の
ホール係数が極低温で前者が正、かつ後者が負であるこ
とに基いている。The above results are based on the fact that the hole coefficients of high-purity aluminum and copper are extremely low and the former is positive and the latter is negative.
【００２２】上記のホール係数とは、ホール効果に基く
定数であって、即ち、電流の流れている導体に垂直な磁
場を加えると、両者に垂直な方向に電場を生じて起電力
を生じ、直交座標で電流をＩX 、磁束密度をＢZ 、ホー
ル電場をＥY とすると、Ｒ＝ＥY ／ＩX ・ＢZ で表さ
れ、ここでＲ（ホール係数）は、電流の担体が電子なら
ば負、正孔ならば正となる。The above-mentioned Hall coefficient is a constant based on the Hall effect, that is, when a perpendicular magnetic field is applied to a current-carrying conductor, an electric field is generated in a direction perpendicular to both conductors to generate an electromotive force, Assuming that the current is I X , the magnetic flux density is B Z , and the Hall electric field is E Y in the rectangular coordinates, R = E Y / I X · B Z , where R (Hall coefficient) is the current carrier If it is negative, it is positive if it is a hole.
【００２３】図９（ａ）、（ｂ）に示すように、高純度
アルミニウム材５、５´の外側に銅６、６′を被覆した
円形断面または矩形断面の複合材７、７′においては、
極低温で高純度アルミニウム材と銅のホール係数の符号
が反対であるために、互いに逆の起電力を生じ、この起
電力により複合材７、７′の断面内で電荷のドリフトを
生ずるため合成比抵抗が増大する。As shown in FIGS. 9 (a) and 9 (b), in a composite material 7, 7 'having a circular or rectangular cross section in which copper 6, 6' is coated on the outside of high purity aluminum material 5, 5 '. ,
Since the signs of the Hall coefficients of high-purity aluminum material and copper are opposite at cryogenic temperatures, electromotive forces opposite to each other are generated. This electromotive force causes a charge drift in the cross section of the composite materials 7 and 7 '. The specific resistance increases.
【００２４】従って、上記の矩形断面の複合材の外側の
銅を、正のホール係数を有するベリリウム、インジウム
等と置換した複合材と超電導線とを接合した複合超電導
々体を用いて超電導コイルを製作した場合に、図７
（ｂ）または図８（ｂ）に示すように幅広面がコイルの
軸方向あるいはコイルによって形成される磁場の方向に
平行になるように配置することにより、その合成比抵抗
が著しく低下し、耐クエンチ特性を向上させることがで
きる。Therefore, the outside of the composite material having the rectangular cross section
Copper, beryllium, indium with positive Hall coefficient
Superconducting by joining superconducting wire with composite material substituted with
When a superconducting coil is manufactured using7
(B) or figure8As shown in (b), the wide surface is
Axially or in the direction of the magnetic field formed by the coil
By arranging them in parallel, their combined specific resistance
Is significantly reduced, and the quench resistance can be improved.
Wear.
【００２５】[0025]
【実施例】以下本発明の実施例について説明する。Embodiments of the present invention will be described below.
【００２６】図１は本発明に用いられる複合超電導々体
の一実施例の断面図を示したもので、１０は超電導線、
１１は高純度アルミニウム材、１２はベリリウム、イン
ジウム等からなる被覆材を示す。FIG. 1 is a cross-sectional view of an embodiment of a composite superconductor used in the present invention.
Reference numeral 11 denotes a high-purity aluminum material, and reference numeral 12 denotes a coating material made of beryllium, indium, or the like.
【００２７】超電導線１０は、銅マトリックス１３中に
多数本のＮｂ3 ＳｎやＮｂ−Ｔｉ合金等のフィラメント
１４を配置したもので、例えば銅被覆Ｎｂ−Ｔｉ線を断
面六角形に成形したシングル線の多数本を銅管中に収容
し、これに減面加工を施して矩形状に成形したものであ
る。The superconducting wire 10 is composed of a copper matrix 13 in which a number of filaments 14 such as Nb 3 Sn or Nb-Ti alloy are arranged. For example, a single wire formed by forming a copper-coated Nb-Ti wire into a hexagonal cross section Are housed in a copper tube, which is subjected to a surface reduction process to be formed into a rectangular shape.
【００２８】複合超電導々体２０は，この超電導線１０
と矩形断面の高純度アルミニウム材１１のの外側に被覆
材１２を接合した複合材２１と半田１５で接合されてい
る。上記の複合材２１は、円形断面の高純度アルミニウ
ムロッドをベリリウム、インジウム等からなる円筒状部
材中に収容し、これに静水圧押出加工および引抜加工を
施して矩形断面に成形することにより得られる。The composite superconductor 20 is formed of the superconducting wire 10
And a composite material 21 in which a covering material 12 is bonded to the outside of a high-purity aluminum material 11 having a rectangular cross section and a solder 15. The composite material 21 is obtained by accommodating a high-purity aluminum rod having a circular cross section in a cylindrical member made of beryllium, indium, or the like, and subjecting the same to hydrostatic extrusion and drawing to form a rectangular cross section. .
【００２９】同図に示すように、この複合超電導々体２
０は外部磁場Ｈに対して高純度アルミニウム材１１の幅
広面が平行になるように配置して用いられる。即ち、図
２に示すように、絶縁被覆を施した複合超電導々体２
０′をコイル２２の軸方向と高純度アルミニウム材１１
の幅広面が平行になるように巻枠２３上に巻回してマグ
ネットを形成する。このように複合超電導々体２０´を
配置することにより、複合材２１の比抵抗を著しく低減
することができ、導体全体の比抵抗を高純度アルニウム
材の比抵抗に近付けることが可能となる。As shown in the figure, the composite superconductor 2
Numeral 0 is used such that the wide surface of the high-purity aluminum material 11 is parallel to the external magnetic field H. That is, as shown in FIG.
0 ′ is the axial direction of the coil 22 and the high-purity aluminum material 11
Are wound on the winding frame 23 so that the wide surfaces of the magnets become parallel to form a magnet. By arranging the composite superconducting body 20 'in this manner, the specific resistance of the composite material 21 can be significantly reduced, and the specific resistance of the entire conductor can be made closer to the specific resistance of the high-purity aluminum material.
【００３０】図３は本発明に用いられる複合超電導々体
３０の他の実施例を示したもので、矩形断面の高純度ア
ルミニウム材１１の外側に被覆材１２を接合した複合材
２１の両側に、矩形断面の多芯構造の超電導線１０、１
０を配置し、半田１５で接合した構造を有する。FIG. 3 shows another embodiment of the composite superconductor 30 used in the present invention. The composite superconductor 30 has a rectangular cross section of a high purity aluminum material 11 and a coating material 12 bonded to the outside of the composite material 21 on both sides. , Superconducting wires 10 having a rectangular cross section and a multi-core structure
0 is arranged and joined by solder 15.
【００３１】また、図４は本発明に用いられる複合超電
導々体３１の他の実施例を示したもので、断面凹状の銅
ハウジング部材３２、３２′の凹状部を対向させて配置
し、この内部に超電導線１０を収容して半田１５で接合
したハウジング構造の超電導線３３の両側に複合材２
１′、２１′を配置して、半田１５で接合したものであ
る。この場合、複合材２１′は矩形断面の高純度アルミ
ニウム材１１の幅広面に被覆材１２が接合されている。FIG. 4 shows another embodiment of the composite superconductor 31 used in the present invention. The concave portions of the copper housing members 32 and 32 'having a concave cross section are arranged so as to face each other. The composite material 2 is provided on both sides of a superconducting wire 33 having a housing structure in which the superconducting wire 10 is housed and joined with solder 15.
1 'and 21' are arranged and joined with solder 15. In this case, the covering material 12 is bonded to the wide surface of the high-purity aluminum material 11 having a rectangular cross section in the composite material 21 '.
【００３２】[0032]
【００３３】[0033]
【００３４】上記の複合超電導々体３０、３１も外部磁
場Ｈに対して高純度アルミニウム材１１の幅広面が平行
になるように配置して用いられる。The above-described composite superconductors 30, 31 are also used in such a manner that the wide surface of the high-purity aluminum material 11 is parallel to the external magnetic field H.
【００３５】尚、上記の実施例において同一の部分は同
符号で示した。[0035] Incidentally, Oite same parts in the above examples are shown by the same reference numerals.
【００３６】[0036]
【発明の効果】以上述べたように、本発明によれば、高
純度アルミニウム材とこの高純度アルミニウム材と同符
号のホール係数を有する材料で形成した被覆材からなる
複合材を安定化材として用いることにより、極低温下で
の合成比抵抗を低下させることができるため、高磁界で
の安定性が向上し、耐クエンチ性に優れた複合超電導々
体および超電導コイルが得られる。As described above, according to the present invention, a composite material comprising a high-purity aluminum material and a coating material formed of a material having the same sign as the high-purity aluminum material is used as a stabilizing material. By using this, the combined specific resistance at extremely low temperatures can be reduced, so that stability in a high magnetic field is improved, and a composite superconductor and a superconducting coil having excellent quench resistance are obtained.
【図１】本発明の複合超電導々体の一実施例を示す断面
図。FIG. 1 is a sectional view showing an embodiment of a composite superconductor according to the present invention.
【図２】本発明の超電導コイルの一実施例を示す断面
図。FIG. 2 is a sectional view showing an embodiment of the superconducting coil of the present invention.
【図３】本発明の複合超電導々体の他の実施例を示す断
面図。FIG. 3 is a cross-sectional view showing another embodiment of the composite superconductor according to the present invention.
【図４】本発明の複合超電導々体の他の実施例を示す断
面図。FIG. 4 is a sectional view showing another embodiment of the composite superconductor according to the present invention.
【図５】高純度アルミニウム材と銅被覆高純度アルミニ
ウム材の極低温における比抵抗の外部磁界に対する依存
性を示すグラフ。FIG. 5 is a graph showing the dependence of the specific resistance of a high-purity aluminum material and a copper-coated high-purity aluminum material at an extremely low temperature on an external magnetic field.
【図６】矩形断面の複合材についての極低温における比
抵抗の外部磁界に対する依存性を示すグラフ。FIG. 6 is a graph showing the dependence of the specific resistance at extremely low temperatures on the external magnetic field for a composite material having a rectangular cross section.
【図７】（ａ），（ｂ）はそれぞれ図６の試料Ｃ、Ｃ´
の外部磁界に対する位置関係を示す断面断面図。FIGS. 7A and 7B are samples C and C 'of FIG. 6 , respectively.
Sectional drawing which shows the positional relationship with respect to the external magnetic field of FIG.
【図８】（ａ），（ｂ）はそれぞれ図６の試料Ｄ、Ｄ´
の外部磁界に対する位置関係を示す断面図。8 (a) and (b) are samples D and D 'of FIG. 6 , respectively.
Sectional drawing which shows the positional relationship with respect to an external magnetic field.
【図９】（ａ），（ｂ）はそれぞれ本発明の複合超電導
々体の作用を説明する断面図。FIGS. 9A and 9B are cross-sectional views illustrating the operation of the composite superconductor according to the present invention.
１，３，５，５′，１１…高純度アルミニウム材、 ２，２′，４，６，６′…銅 １０…超電導線 １２………被覆材 １５………半田 ２０、２０′、３０、３１…複合超電導々体 ２１，２１′…複合材 ２２………コイル ２３………巻枠 Ａ………高純度アルミニウム材 Ｂ………銅被覆高純度アルミニウム材 Ｃ、Ｃ′…矩形断面の高純度アルミニウム材の幅広面に
銅を接合した試料。 Ｄ、Ｄ′…矩形断面の高純度アルミニウム材に銅を被覆
した試料。1, 3, 5, 5 ', 11: high-purity aluminum material; 2, 2', 4, 6, 6 ': copper 10 : superconducting wire 12: coating material 15: solder 20, 20'; 30, 31 1: Composite superconducting body 21, 21 '... Composite material 22: Coil 23: Winding frame A: High-purity aluminum material B: Copper-coated high-purity aluminum material C, C' ... A sample in which copper is bonded to a wide surface of a high-purity aluminum material with a rectangular cross section. D, D ': A sample in which a high-purity aluminum material having a rectangular cross section is coated with copper.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 袴田 真志 神奈川県川崎市川崎区小田栄２丁目１番 １号 昭和電線電纜株式会社内 (72)発明者 花井 哲 神奈川県横浜市鶴見区末広町２の４ 株 式会社東芝 京浜事業所内 (72)発明者 和智 良裕 神奈川県横浜市鶴見区末広町２の４ 株 式会社東芝 京浜事業所内 (72)発明者 村瀬 曉 神奈川県川崎市幸区小向東芝町１番地 株式会社東芝 総合研究所内 (72)発明者 藤岡 勉 東京都千代田区内幸町１丁目１番６号 株式会社東芝内 (56)参考文献 特開 平３−192611（ＪＰ，Ａ) 特開 昭60−100305（ＪＰ，Ａ) 特開 昭64−10529（ＪＰ，Ａ) 特開 昭61−224214（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01B 12/10 ZAA H01F 6/06 ZAA ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masashi Hakamada 2-1, 1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Showa Electric Wire & Cable Co., Ltd. (72) Inventor Tetsu Hanai 2 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa In the Toshiba Keihin Works, (72) Inventor Yoshihiro Wachi In the 2nd Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Toshiba Corporation In the Keihin Works, (72) The inventor Satoshi Murase Komukai, Sachi-ku, Kawasaki-shi, Kanagawa No. 1, Toshiba-cho, Toshiba Research Institute, Inc. (72) Inventor, Tsutomu Fujioka 1-1-6, Uchisaiwai-cho, Chiyoda-ku, Tokyo Toshiba, Inc. (56) References JP-A-3-192611 (JP, A) JP-A-60-100305 (JP, A) JP-A-64-10529 (JP, A) JP-A-61-224214 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01B 12 / 10 ZAA H01F 6/06 Z AA
Claims (1)
と、これに接合された安定化材とからなる複合超電導々
体を巻回した超電導コイルにおいて、前記安定化材を、
矩形断面を有する高純度アルミニウム材の外周面にベリ
リウム、インジウム、マグネシウムまたはこれ等の合金
を被覆した複合材により形成するとともに、前記高純度
アルミニウム材の幅広面がコイルの軸方向あるいはコイ
ルによって形成される磁場の方向に平行になるように配
置し、かつ前記超電導線を前記安定化材に対してコイル
の軸方向あるいはコイルによって形成される磁場の方向
に垂直になる位置に配置して巻回して形成することを特
徴とする超電導コイル。1. A superconducting coil formed by winding a composite superconducting body composed of a superconducting wire having a multi-core structure formed into a rectangular shape and a stabilizing material joined thereto, wherein the stabilizing material is
Beryllium outside circumferential surface of the high purity aluminum material having a rectangular cross-section, indium, and forming a composite material coated with magnesium or this like an alloy, formed by the high-purity wide surface axial or coils of the coil of aluminum material And the superconducting wire is coiled with respect to the stabilizing material.
Axis direction or direction of magnetic field formed by coil
A superconducting coil characterized by being wound at a position perpendicular to the superconducting coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13237892A JP3356459B2 (en) | 1992-05-25 | 1992-05-25 | Superconducting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13237892A JP3356459B2 (en) | 1992-05-25 | 1992-05-25 | Superconducting coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06162837A JPH06162837A (en) | 1994-06-10 |
| JP3356459B2 true JP3356459B2 (en) | 2002-12-16 |
Family
ID=15079985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13237892A Expired - Lifetime JP3356459B2 (en) | 1992-05-25 | 1992-05-25 | Superconducting coil |
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| Country | Link |
|---|---|
| JP (1) | JP3356459B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000277322A (en) * | 1999-03-26 | 2000-10-06 | Toshiba Corp | High-temperature superconducting coil, high-temperature superconducting magnet using the same, and high-temperature superconducting magnet system |
-
1992
- 1992-05-25 JP JP13237892A patent/JP3356459B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06162837A (en) | 1994-06-10 |
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