JP2001264402A - High magnetic field and high homogeneous superconducting magnet device - Google Patents
High magnetic field and high homogeneous superconducting magnet deviceInfo
- Publication number
- JP2001264402A JP2001264402A JP2000076788A JP2000076788A JP2001264402A JP 2001264402 A JP2001264402 A JP 2001264402A JP 2000076788 A JP2000076788 A JP 2000076788A JP 2000076788 A JP2000076788 A JP 2000076788A JP 2001264402 A JP2001264402 A JP 2001264402A
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- Prior art keywords
- superconducting
- magnetic field
- coil group
- magnet device
- space
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、永久電流を利用し
た核磁気共鳴（ＮＭＲ）装置に用いられる超電導マグネ
ット等の様に、高磁場で且つ磁場均一度が高いことが要
求される超電導磁石装置（永久電流磁石装置）に関する
ものである。The present invention relates to a superconducting magnet device which is required to have a high magnetic field and a high magnetic field uniformity, such as a superconducting magnet used for a nuclear magnetic resonance (NMR) device utilizing a permanent current. (Permanent current magnet device).
【０００２】[0002]
【従来の技術】近年、ＮＭＲ装置用超電導マグネットで
は、発生する磁場をより高くすることが要求されてい
る。従来から使用されてきた超電導材料であるＮｂＴｉ
を主材料とするいわゆる合金系材料や、Ｎｂ3Ｓｎに代
表される化合物系材料では、液体ヘリウムの沸点である
約４．２Ｋにおける上部臨界磁場が、夫々約１１．５
Ｔ、約２２Tである。そして、こうした超電導材料を用
いて、上記の臨界磁場よりも更に高い磁場を発生するＮ
ＭＲ装置用超電導マグネットを実現しようとする場合に
は、それらを冷却する液体ヘリウムを減圧して液体へリ
ウムの温度を低下させる（膨張冷却）ことによって、超
電導材料の上部臨界磁場を上昇させ、その結果としてマ
グネットが発生する磁場を高める方法が採用される。2. Description of the Related Art In recent years, a superconducting magnet for an NMR apparatus has been required to generate a higher magnetic field. NbTi, a superconducting material that has been used
In the case of a so-called alloy material whose main material is a compound material or a compound material represented by Nb 3 Sn, the upper critical magnetic field at about 4.2 K, which is the boiling point of liquid helium, is about 11.5 K, respectively.
T, about 22T. Then, by using such a superconducting material, N is used to generate a magnetic field even higher than the critical magnetic field.
In the case of realizing superconducting magnets for MR devices, the upper critical magnetic field of the superconducting material is raised by reducing the temperature of the liquid helium by reducing the pressure of the liquid helium that cools them (expansion cooling). As a result, a method of increasing the magnetic field generated by the magnet is adopted.
【０００３】一方、１９８９年に発見された酸化物超電
導材料は、臨界磁場が上記合金系材料や化合物系材料に
比べて遥かに高い１００〜７００Ｔ程度であることが知
られている。そして、こうした材料をＮＭＲ用超電導マ
グネットの巻線部材に用いることによって、ＮＭＲ用超
電導マグネットの発生する磁場を高めることができるこ
とは容易に推測できる。On the other hand, oxide superconducting materials discovered in 1989 are known to have a critical magnetic field of about 100 to 700 T, which is much higher than that of the above-mentioned alloy materials and compound materials. Then, it can be easily presumed that by using such a material for the winding member of the superconducting magnet for NMR, the magnetic field generated by the superconducting magnet for NMR can be increased.
【０００４】しかしながら酸化物超電導材料は、長尺で
均一な特性を有する線材を作製することが現時点では困
難である。また、ＮＭＲ用超電導マグネットには、それ
が発生する磁場を時間的に極めて安定に発生することが
要求され、線材間の接続抵抗を極めて少なくする接続技
術が必要であるが、酸化物超電導線材においては、線材
間の接続抵抗を極めて少なくして永久電流を維持する為
の技術は確立されていないのが実状である。[0004] However, it is difficult at present to produce a wire having a long and uniform property as the oxide superconducting material. In addition, the superconducting magnet for NMR is required to generate the magnetic field generated by the magnet very stably with respect to time, and a connection technique for extremely reducing the connection resistance between the wires is required. In fact, there is no established technique for maintaining a permanent current by making the connection resistance between wires extremely small.
【０００５】ところで、上記ＮＭＲ装置用超電導マグネ
ット等の様に磁場の均一度が高いことが要求されている
超電導磁石装置においては、主磁場を発生するメインコ
イル群、このメインコイル群が超電導マグネットの軸芯
部分に発生する磁場の空間的な分布を概略均一に補正す
る補正コイル群、および前記２つのコイル群で超電導マ
グネットの軸芯付近に発生する磁場の空間的な分布を精
密に調整するシムコイル群が同芯状に配列されて構成さ
れるのが一般的である。また上記シムコイル群は、メイ
ンコイル群、補正コイル群および超電導シムコイル群を
包含する低温容器の径方向の内側で超電導マグネット群
の軸芯付近に設置される常電導シムコイル群と、低温容
器の径方向の最も外側に配置され超電導線材を部材とす
る超電導シムコイル群とで構成されることが多い。Incidentally, in a superconducting magnet apparatus which requires a high degree of uniformity of the magnetic field, such as the above-described superconducting magnet for an NMR apparatus, a main coil group for generating a main magnetic field, and the main coil group is formed of a superconducting magnet. A correction coil group for substantially uniformly correcting the spatial distribution of a magnetic field generated in the shaft core portion, and a shim coil for precisely adjusting the spatial distribution of the magnetic field generated near the shaft core of the superconducting magnet by the two coil groups In general, the groups are arranged concentrically. The shim coil group includes a normal conductive shim coil group installed near the axis of the superconducting magnet group inside the radial direction of the low temperature container including the main coil group, the correction coil group, and the superconducting shim coil group, and a radial direction of the low temperature container. And a superconducting shim coil group composed of a superconducting wire as a member.
【０００６】上記の様な状況の下で、高磁場ＮＭＲ装置
用超電導マグネットを作製する場合には、該マグネット
の中央部付近に存在するメインコイル群の一部を、酸化
物超電導コイル群に入れ替えることで、磁場を更に高め
得ることが期待される。従って、この様な将来の技術開
発成果に備えて、超電導マグネットをその成果に対応で
きる様な構成にしておくことが必要である。In the case of manufacturing a superconducting magnet for a high-field NMR apparatus under the above-mentioned situation, a part of a main coil group near the center of the magnet is replaced with an oxide superconducting coil group. Thus, it is expected that the magnetic field can be further increased. Therefore, it is necessary to prepare the superconducting magnet so as to be able to cope with the result of such future technological development.
【０００７】一般に、中央部付近に存在するメインコイ
ル群の一部を交換した場合には、磁場の分布が大きく変
化し、既存の超電導コイル群や常電導シムコイル群では
磁場を均一にすることができず、補正コイル群を作製し
なおす必要がある。しかしながら、補正コイル群を作製
し直すとその幾何学的寸法が変化し、当該補正コイル群
の外側に設置される超電導シムコイル群を設置すること
ができなくなる。こうしたことから、超電導シムコイル
群をも作製し直す必要がある。更には、超電導コイル群
を包含する低温容器をも作製し直す必要が出てくる。In general, when a part of the main coil group located near the center is replaced, the distribution of the magnetic field changes greatly, and the magnetic field of the existing superconducting coil group or the normal conducting shim coil group must be made uniform. It is not possible, and it is necessary to re-make the correction coil group. However, when the correction coil group is re-manufactured, its geometric dimension changes, and it becomes impossible to install a superconducting shim coil group installed outside the correction coil group. For this reason, it is necessary to recreate the superconducting shim coil group. Further, it is necessary to re-create a low-temperature container including a superconducting coil group.
【０００８】[0008]
【発明が解決しようとする課題】本発明はこうした状況
の下でなされたものであって、その目的は、将来の酸化
物超電導材料の開発成果を取り込める様にしながら、現
時点で作製できる超電導線材を使用した高磁場で且つ均
一度の高い超電導磁石装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made under such a circumstance, and an object of the present invention is to provide a superconducting wire that can be manufactured at the present time while incorporating future development results of oxide superconducting materials. It is an object of the present invention to provide a used superconducting magnet device having a high magnetic field and a high degree of uniformity.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成し得た本
発明の超電導磁石装置とは、主磁場を発生する超電導メ
インコイル群と、前記超電導コイル群の中心付近の空間
における磁場の均一度を維持する様に磁場の空間分布を
調整するための超電導補正コイル群および超電導シムコ
イル群が同芯状に配列された高磁場均一度超電導磁石装
置において、前記超電導メインコイル群と超電導シムコ
イル群の間に補正コイル追加用の円筒状予備空間を設け
たものである点に要旨を有するものである。A superconducting magnet device according to the present invention which has achieved the above object comprises a superconducting main coil group for generating a main magnetic field, and a uniformity of a magnetic field in a space near the center of the superconducting coil group. The superconducting correction coil group and the superconducting shim coil group for adjusting the spatial distribution of the magnetic field so as to maintain the superconducting shim coil group are arranged concentrically. Is provided with a cylindrical spare space for adding a correction coil.
【００１０】上記本発明の超電導磁石装置においては、
前記円筒状予備空間に空間占拠部材を配置したものであ
ることが好ましい。また、前記空間占拠部材としては、
アルミニウム若しくはアルミニウム合金、または鉄若し
くは鉄合金、または銅若しくは銅合金、またはガラス繊
維強化樹脂からなるもの、等を挙げることができる。In the superconducting magnet device of the present invention,
It is preferable that a space occupying member is arranged in the cylindrical spare space. Further, as the space occupying member,
Examples thereof include aluminum, an aluminum alloy, iron, an iron alloy, copper, a copper alloy, and a glass fiber reinforced resin.
【００１１】[0011]
【発明の実施の形態】以下図面に基づき、従来の装置構
成と対比しつつ、本発明装置の作用効果についてより具
体的に説明する。図１は、従来の永久電流磁石装置（超
電導磁石装置）の一構成例を示す概略断面図であり、図
２は従来技術における永久電流磁石装置においてメイン
コイルの一部を酸化物超電導材料からなるコイルに置き
換えた場合を想定した概略断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, the operation and effect of the apparatus of the present invention will be more specifically described in comparison with a conventional apparatus configuration. FIG. 1 is a schematic cross-sectional view showing an example of the configuration of a conventional permanent current magnet device (superconducting magnet device). FIG. 2 shows a conventional permanent current magnet device in which a part of a main coil is made of an oxide superconducting material. It is a schematic sectional view assuming the case where it replaced with the coil.
【００１２】図１に示した装置構成において、主磁場を
発生する超電導メインコイル群は、Ｎｂ3Ｓｎ超電導線
材が巻回された超電導メインコイル１と、ＮｂＴｉ超電
導線材が巻回された超電導メインコイル２から構成され
ている。超電導メインコイル２の径方向外側には、Ｎｂ
Ｔｉ超電導超電導線材が巻回された超電導補正コイル群
３ａ〜３ｂが設けられている。また、超電導補正コイル
群３ａ〜３ｂの径方向外側には、ＮｂＴｉ超電導超電導
線材が巻回された超電導シムコイル群４ａ〜４ｆが設け
られている。即ち、この永久電流磁石装置においては、
超電導メインコイル１，２からなる超電導メインコイル
群、超電導補正コイル群３ａ〜３ｂ、および超電導シム
コイル群４ａ〜４ｆが同芯状に配列されて構成されてい
る。In the apparatus configuration shown in FIG. 1, a superconducting main coil group for generating a main magnetic field includes a superconducting main coil 1 on which an Nb 3 Sn superconducting wire is wound, and a superconducting main coil on which an NbTi superconducting wire is wound. 2 is comprised. Nb is provided radially outside the superconducting main coil 2.
Superconducting correction coil groups 3a to 3b around which a Ti superconducting superconducting wire is wound are provided. Further, superconducting shim coil groups 4a to 4f around which NbTi superconducting superconducting wires are wound are provided radially outside the superconducting correction coil groups 3a to 3b. That is, in this permanent current magnet device,
A superconducting main coil group including superconducting main coils 1 and 2, superconducting correction coil groups 3a to 3b, and superconducting shim coil groups 4a to 4f are arranged concentrically.
【００１３】そして以上の超電導コイル群は、低温容器
（クライオスタット）６の中に収納され、この低温容器
６内は液体窒素および液体ヘリウムによって低温に維持
されている。また、この低温容器６の中央付近の室温空
間部分には、常電導シムコイル５が設けられている。ま
た、この室温空間はサンプル挿入孔となっており、高周
波プローブを入れることによって、サンプルの測定を行
なう様にされる。The above-described superconducting coil group is housed in a low-temperature container (cryostat) 6, and the inside of the low-temperature container 6 is maintained at a low temperature by liquid nitrogen and liquid helium. A normal conductive shim coil 5 is provided in the room temperature space near the center of the low-temperature container 6. The room temperature space is a sample insertion hole, and a sample is measured by inserting a high-frequency probe.
【００１４】こうした装置構成において、超電導メイン
コイル１の一部を酸化物超電導材料からなるコイルに置
き換える場合を想定したのが、図２に示した装置構成で
ある。そして図２に示した装置においては、超電導メイ
ンコイル１ａは、酸化物超電導材料およびＮｂ3Ｓｎ超
電導線材が巻回されて構成されることになる。また、超
電導メインコイル２がＮｂＴｉ超電導線材で構成される
こと、および超電導メインコイル２の外側に、ＮｂＴｉ
超電導線材が巻回された超電導線材が巻回された超電導
補正コイル群３ａ〜３ｃが設けられることは前記図１の
場合と同様である。In such an apparatus configuration, the case where a part of the superconducting main coil 1 is replaced by a coil made of an oxide superconducting material is assumed in the apparatus configuration shown in FIG. In the apparatus shown in FIG. 2, the superconducting main coil 1a is formed by winding an oxide superconducting material and an Nb 3 Sn superconducting wire. Further, superconducting main coil 2 is made of NbTi superconducting wire, and NbTi
The superconducting correction coil groups 3a to 3c in which the superconducting wire is wound are provided as in the case of FIG.
【００１５】そして、図２に示した装置においては、前
記図１に示した装置構成に比べて超電導メインコイル１
ａの一部が酸化物超電導材料に変更されているので、超
電導メインコイル群１ａ，２、超電導補正コイル群３ａ
〜３ｃによって合成して発生される磁場の均一度に変化
が生じることになり、こうした変化に対応する為に、超
電導補正コイル群３ａ〜３ｃの外側に、超電導補正コイ
ル群７ａ〜７ｃが新たに追加して設けられることにな
る。またこうした設計変更に応じて、超電導補正コイル
群７ａ〜７ｃの外側には、上記超電導シムコイル群４ａ
〜４ｆよりも更に大きなものに作製し直された超電導シ
ムコイル９ａ〜９ｆが設けらることになる。In the device shown in FIG. 2, the superconducting main coil 1 is different from the device shown in FIG.
a is changed to an oxide superconducting material, the superconducting main coil groups 1a and 2 and the superconducting correction coil group 3a
To 3c, a change occurs in the uniformity of the magnetic field generated and synthesized. In order to cope with such a change, superconducting correction coil groups 7a to 7c are newly provided outside the superconducting correction coil groups 3a to 3c. It will be additionally provided. In response to such a design change, the superconducting shim coil group 4a is provided outside the superconducting correction coil groups 7a to 7c.
The superconducting shim coils 9a to 9f that are re-fabricated to have a size larger than that of the superconducting shim coils 9a to 9f are provided.
【００１６】そして以上の超電導コイル群は、低温容器
６ａ内に収納されることになるが、図２に示した装置は
前記図１に示した装置と比べて、超電導補正コイル７ａ
〜７ｃを新たに設置し、また前記超電導シムコイル群４
ａ〜４ｆよりも更に大きくした超電導シムコイル９ａ〜
９ｆが設けられることになるので、これらを収納する低
温容器６ａにおいても、図１に示した前記低温容器６に
比べて直径が大きくならざるを得ない。尚、こうした低
温容器６ａにおいても、その中央付近には、磁場の不均
一性をより精密に補正する為の常電導シムコイル５が設
けられるのは、前記図１に示した装置構成の場合と同様
である。The above-mentioned superconducting coil group is housed in the low-temperature container 6a. The apparatus shown in FIG. 2 is different from the apparatus shown in FIG.
To 7c are newly installed, and the superconducting shim coil group 4
superconducting shim coils 9a to
Since 9f is provided, the diameter of the low-temperature container 6a for accommodating them is inevitably larger than that of the low-temperature container 6 shown in FIG. In this low-temperature vessel 6a, the normal conducting shim coil 5 for correcting the non-uniformity of the magnetic field more precisely is provided near the center of the low-temperature vessel 6a, similarly to the case of the apparatus configuration shown in FIG. It is.
【００１７】上述した様に、従来の永久電流超電導磁石
装置においては、将来的にメインコイルの一部を酸化物
超電導材料に置き換えた場合には、超電導補正コイル群
７ａ〜７ｃ、超電導シムコイル群９ａ〜９ｆ、および低
温容器６ａを新たに作製し直す必要がある。As described above, in the conventional permanent current superconducting magnet device, if a part of the main coil is replaced by an oxide superconducting material in the future, the superconducting correction coil groups 7a to 7c and the superconducting shim coil group 9a To 9f and the low-temperature container 6a need to be newly prepared.
【００１８】図３は本発明に係る永久電流磁石装置の一
構成例を示す概略断面図であり、前記図１、２と対応す
る部分には同一の参照符号を付すことによって重複説明
を回避する。尚、本発明に係る超電導磁石装置は、図３
に示した構成に限定されるものではなく、例えば図３で
は超電導補正コイル群３ａ〜３ｃが、３つのコイルから
構成されており、その長さも夫々異なるのが通常である
が、このコイルの個数や長さは装置の様式によって適宜
変更されるものである。FIG. 3 is a schematic sectional view showing an example of the configuration of a permanent current magnet apparatus according to the present invention. The same reference numerals are given to portions corresponding to those in FIGS. . The superconducting magnet device according to the present invention is shown in FIG.
However, for example, in FIG. 3, the superconducting correction coil groups 3a to 3c are composed of three coils, each of which usually has a different length. The length and length are appropriately changed depending on the type of the device.
【００１９】本発明の装置においては、上記超電導補正
コイル群３ａ〜３ｃと超電導シムコイル９ａ〜９ｆ群の
間に、円筒状予備空間８が設けられている。そして、こ
の予備空間８は、超電導メインコイル１の一部が将来的
に酸化物超電導線材で巻回された超電導コイルとされる
ときに、前記図２に示した様な超電導補正コイル群７ａ
〜７ｃが追加して設置されることになる。また、上記の
様に円筒状予備空間８を設けることによって、前記図１
に示した超電導シムコイル４ａ〜４ｆと比べて予め大き
くした超電導シムコイル９ａ〜９ｆが配置される。更
に、これに応じて、低温容器６ａも、前記各コイル群が
収納できる様に、その直径が比較的大きく設定されてい
る。即ち、図３に示した本発明の装置構成では、図２に
示した様な超電導補正コイル７ａ〜７ｃの代りに、予備
空間８を設けたものである。In the apparatus of the present invention, a cylindrical spare space 8 is provided between the superconducting correction coil groups 3a to 3c and the superconducting shim coils 9a to 9f. When a part of the superconducting main coil 1 is to be formed as a superconducting coil wound with an oxide superconducting wire in the future, the spare space 8 has a superconducting correction coil group 7a as shown in FIG.
To 7c are additionally provided. In addition, by providing the cylindrical preliminary space 8 as described above,
The superconducting shim coils 9a to 9f which are larger than the superconducting shim coils 4a to 4f shown in FIG. In addition, the diameter of the low-temperature container 6a is set to be relatively large so that the coil groups can be stored. That is, in the apparatus configuration of the present invention shown in FIG. 3, a spare space 8 is provided instead of the superconducting correction coils 7a to 7c as shown in FIG.
【００２０】従って、図３に示した本発明の超電導磁石
装置では、超電導メインコイル１の一部が酸化物超電導
材料でされた場合に、新たに作製する必要があるのは、
超電導補正コイル群７ａ〜７ｃだけで良いことになる。Therefore, in the superconducting magnet device of the present invention shown in FIG. 3, when a part of the superconducting main coil 1 is made of an oxide superconducting material, it is necessary to newly produce it.
Only the superconducting correction coil groups 7a to 7c are required.
【００２１】尚、図３に示した構成では、超電導補正コ
イル群３ａ〜３ｃと超電導シムコイル９ａ〜９ｆ群の間
に円筒状予備空間８を設ける構成としたけれども、円筒
状予備空間８が設けられる位置は、超電導メインコイル
群１，２と超電導補正コイル群３ａ〜３ｃの間とするこ
ともでき、要するに超電導メインコイル群１，２と超電
導シムコイル９ａ〜９ｆ群の間であれば良い。また、こ
の予備空間８の大きさは、その幅が少なくとも１ｍｍ以
上である必要があるが、通常５〜２０ｍｍ程度に設定す
れば良い。In the configuration shown in FIG. 3, although the cylindrical preliminary space 8 is provided between the superconducting correction coil groups 3a to 3c and the superconducting shim coils 9a to 9f, the cylindrical preliminary space 8 is provided. The position may be between the superconducting main coil groups 1 and 2 and the superconducting correction coil groups 3a to 3c. In short, the position may be between the superconducting main coil groups 1 and 2 and the superconducting shim coils 9a to 9f group. In addition, the size of the spare space 8 needs to be at least 1 mm or more, but may be usually set to about 5 to 20 mm.
【００２２】ところで、図３に示した様な超電導磁石装
置の全体を冷却する場合には、前記予備空間８にも液体
ヘリウム等の液体が充満されることになる。そして、こ
の磁石装置を冷却する液体ヘリウムを減圧して液体ヘリ
ウムの温度を低下させ、そのことにより超電導材料の上
部臨界磁場を上昇させ、その結果としてマグネットが発
生する磁場を高める方法を採用したときには、予備空間
８に存在する液体ヘリウムをも温度を低下させる必要が
る。When the entire superconducting magnet device as shown in FIG. 3 is cooled, the spare space 8 is also filled with liquid such as liquid helium. And when the method of increasing the magnetic field generated by the magnet by adopting a method of reducing the temperature of the liquid helium by decompressing the liquid helium that cools the magnet device and thereby increasing the upper critical magnetic field of the superconducting material, Also, the temperature of the liquid helium existing in the preliminary space 8 needs to be lowered.
【００２３】例えば、予備空間８の大きさが、内直径：
９２７ｍｍ，外直径：９６０ｍｍ，長さ：１６０４ｍｍ
であるとすると、その容積は約７８リットルとなる。そ
してこうした容積に相当する液体ヘリウムを４．２Ｋか
ら１．８Ｋに冷却するに必要な電力は約２５ＫＷｈ程度
となる。即ち、上記の様な予備空間８を設けた場合に
は、それだけ冷却の為の電力を消費して不経済となる事
態を招くことになる。For example, the size of the preliminary space 8 is determined by the inner diameter:
927mm, outer diameter: 960mm, length: 1604mm
, The volume is about 78 liters. The electric power required to cool the liquid helium corresponding to such a volume from 4.2K to 1.8K is about 25 KWh. That is, when the spare space 8 as described above is provided, power for cooling is consumed correspondingly, which leads to uneconomical situation.
【００２４】こうした事態を回避する手段として、上記
予備空間８内に当該予備空間８に対応した形状の空間占
拠部材をアルミニウムやアルミニウム合金等によって作
製し、前記超電導補正コイル７ａ〜７ｃを追加して設置
するまでは、この空間占拠部材を配置しておくことも好
ましい実施形態として挙げられる。こうした構成を採用
して、予備空間８内に充填される液体ヘリウムを排除す
ることによって、無駄な電力消費の発生をなくすことが
できる。As means for avoiding such a situation, a space occupying member having a shape corresponding to the spare space 8 is made of aluminum or an aluminum alloy in the spare space 8, and the superconducting correction coils 7a to 7c are added. Until the installation, the space occupying member may be arranged as a preferred embodiment. By adopting such a configuration and eliminating liquid helium filled in the spare space 8, it is possible to eliminate wasteful power consumption.
【００２５】尚、予備空間８内に配置される円筒状部材
としては、上記したアルミニウムやアルミニウム合金か
らなるものに限らず、鉄若しくは鉄合金からなるもの
や、銅若しくは銅合金からなるもの、更にはガラス繊維
強化樹脂からなるもの、等も使用できるが、特に鉄また
は鉄合金からなるもので非磁性のものを採用すること
は、磁場の均一度を達成するという観点および円筒部部
材に電磁力が作用しないという観点から好ましい。The cylindrical members arranged in the preliminary space 8 are not limited to those made of aluminum or aluminum alloy, but those made of iron or iron alloy, those made of copper or copper alloy, and those made of copper or copper alloy. Can be made of glass fiber reinforced resin, etc.In particular, the use of non-magnetic materials made of iron or iron alloy is effective in achieving the uniformity of the magnetic field and the electromagnetic force applied to the cylindrical member. Is preferred from the viewpoint that the compound does not act.
【００２６】[0026]
【発明の効果】本発明は以上の様に構成されており、将
来の酸化物超電導材料の開発成果を取り込める様にしな
がら、現時点で作製できる超電導線材を使用した高磁場
で且つ均一度の高い超電導磁石装置が実現できた。The present invention is constructed as described above, and uses a superconducting wire material that can be produced at the present time in a high magnetic field and a high degree of uniformity while incorporating the development results of oxide superconducting materials in the future. A magnet device was realized.
【図１】従来の永久電流磁石装置の一構成例を示す概略
断面図である。FIG. 1 is a schematic cross-sectional view showing one configuration example of a conventional permanent current magnet device.
【図２】従来技術における永久電流磁石装置においてメ
インコイルの一部を酸化物超電導材料からなるコイルに
置き換えた場合を想定した概略断面図である。FIG. 2 is a schematic cross-sectional view assuming that a part of a main coil is replaced with a coil made of an oxide superconducting material in a permanent current magnet device according to a conventional technique.
【図３】本発明に係る永久電流磁石装置の一構成例を示
す概略断面図である。FIG. 3 is a schematic sectional view showing a configuration example of a permanent current magnet device according to the present invention.
１，１ａ，２ 超電導メインコイル ３ａ〜３ｃ，７ａ〜７ｃ 超電導補正コイル ４ａ〜４ｆ，９ａ〜９ｆ 超電導シムコイル ５ 常電導シムコイル ６，６ａ 低温容器 ８ 円筒状予備空間 1, 1a, 2 Superconducting main coil 3a to 3c, 7a to 7c Superconducting correction coil 4a to 4f, 9a to 9f Superconducting shim coil 5 Normal conducting shim coil 6, 6a Cryogenic vessel 8 Cylindrical spare space
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松本 真治 茨城県つくば市千現１丁目２番１号 科学 技術庁金属材料技術研究所内 (72)発明者 伴野 信哉 茨城県つくば市千現１丁目２番１号 科学 技術庁金属材料技術研究所内 (72)発明者 佐藤 明男 茨城県つくば市千現１丁目２番１号 科学 技術庁金属材料技術研究所内 (72)発明者 和田 仁 茨城県つくば市千現１丁目２番１号 科学 技術庁金属材料技術研究所内 (72)発明者 濱田 衛 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 (72)発明者 林 征治 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 (72)発明者 伊藤 聡 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 (72)発明者 吉川 正敏 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 (72)発明者 神門 剛 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 (72)発明者 尾崎 修 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 Ｆターム(参考） 4C096 AB32 CA02 CA22 CA32 CA35 CA36 CA70 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Matsumoto 1-2-1, Sengen, Tsukuba-shi, Ibaraki Prefectural Institute of Science and Technology (72) Inventor Shinya Banno 1-2-1, Sengen, Tsukuba-shi, Ibaraki No. 72, Metallurgical Research Institute, Science and Technology Agency (72) Inventor Akio Sato 1-2-1, Sengen, Tsukuba City, Ibaraki Pref. No. 1 Science and Technology Agency Metal Materials Research Laboratory (72) Inventor Mamoru Hamada 1-5-5 Takatsukadai, Nishi-ku, Kobe City Kobe Steel Works, Ltd.Kobe Research Institute (72) Inventor Seiji Hayashi Nishi-ku, Kobe City 1-5-5 Takatsukadai Inside Kobe Research Institute, Kobe Steel Ltd. (72) Inventor Satoshi Ito 1 Takatsukadai, Nishi-ku, Kobe Go 5-5 Kobe Steel, Ltd.Kobe Research Institute (72) Inventor Masatoshi Yoshikawa 1-5-5 Takatsukadai, Nishi-ku, Kobe City Kobe Steel, Kobe Research Institute (72) Inventor Takeshi Komon 1-5-5 Takatsukadai, Nishi-ku, Kobe Kobe Steel Works, Ltd.Kobe Research Institute (72) Inventor Osamu Ozaki 1-5-5 Takatsukadai, Nishi-ku, Kobe Kobe Steel Corporation Kobe General Co., Ltd. F-term in Technical Research Institute (reference) 4C096 AB32 CA02 CA22 CA32 CA35 CA36 CA70
Claims (3)
と、前記超電導コイル群の中心付近の空間における磁場
の均一度を維持する様に磁場の空間分布を調整するため
の超電導補正コイル群および超電導シムコイル群が同芯
状に配列された高磁場均一度超電導磁石装置において、
前記超電導メインコイル群と超電導シムコイル群の間に
補正コイル追加用の円筒状予備空間を設けたものである
ことを特徴とする高磁場均一度超電導磁石装置。A superconducting main coil group for generating a main magnetic field, a superconducting correction coil group for adjusting a spatial distribution of a magnetic field so as to maintain a uniform magnetic field in a space near the center of the superconducting coil group, and a superconducting coil. In a high magnetic field uniformity superconducting magnet device in which shim coils are arranged concentrically,
A high magnetic field uniformity superconducting magnet device, wherein a cylindrical preliminary space for adding a correction coil is provided between the superconducting main coil group and the superconducting shim coil group.
置したものである請求項１に記載の高磁場均一度超電導
磁石装置。2. The superconducting magnet device having a high magnetic field homogeneity according to claim 1, wherein a space occupying member is arranged in the cylindrical preliminary space.
くはアルミニウム合金、または鉄若しくは鉄合金、また
は銅若しくは銅合金、またはガラス繊維強化樹脂からな
るものである請求項２に記載の超電導磁石装置。3. The superconducting magnet device according to claim 2, wherein the space occupying member is made of aluminum, an aluminum alloy, iron, an iron alloy, copper, a copper alloy, or a glass fiber reinforced resin.
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| JP2000076788A JP4074042B2 (en) | 2000-03-17 | 2000-03-17 | Superconducting magnet device with high magnetic field and high magnetic field uniformity |
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|---|---|---|---|
| JP2000076788A JP4074042B2 (en) | 2000-03-17 | 2000-03-17 | Superconducting magnet device with high magnetic field and high magnetic field uniformity |
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| US7090478B2 (en) | 2003-02-24 | 2006-08-15 | Independent Administrative Institution National Institute For Materials Science | Apparatus and method for manufacturing an anisotropic formed body |
| WO2004095047A1 (en) * | 2003-04-24 | 2004-11-04 | Hitachi, Ltd. | Uniform magnetic field generation device and nuclear magnetic resonance device using the same |
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