JPH05182828A - Superconducting magnet for nmr analysis - Google Patents
Superconducting magnet for nmr analysisInfo
- Publication number
- JPH05182828A JPH05182828A JP15692A JP15692A JPH05182828A JP H05182828 A JPH05182828 A JP H05182828A JP 15692 A JP15692 A JP 15692A JP 15692 A JP15692 A JP 15692A JP H05182828 A JPH05182828 A JP H05182828A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- superconductor wire
- magnetic field
- superconducting wire
- main
- 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.)
- Pending
Links
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＮＭＲ（核磁気共鳴）
分析用超電導マグネットに関するものである。The present invention relates to NMR (nuclear magnetic resonance).
The present invention relates to a superconducting magnet for analysis.
【０００２】[0002]
【従来の技術】従来のＮＭＲ分析用超電導マグネットは
主コイルには金属系超電導体、具体的はＮｂＴｉ系超電
導線あるいはＮｂ3Ｓｎ系超電導線が使用されている。2. Description of the Related Art In a conventional superconducting magnet for NMR analysis, a metal superconductor, specifically, an NbTi superconducting wire or an Nb 3 Sn superconducting wire is used as a main coil.
【０００３】[0003]
【発明が解決しようとする課題】材料の臨界磁場の制約
からＮｂＴｉ超電導線コイルでは９Ｔ（テスラ）が、Ｎ
ｂ3Ｓｎ超電導線コイルでは１５〜１６Ｔがそれぞれ発
生磁場の限界になっている。Due to the restriction of the critical magnetic field of the material, NbTi superconducting wire coil has N of 9T (Tesla).
In the b 3 Sn superconducting wire coil, 15 to 16 T is the limit of the generated magnetic field.
【０００４】本発明は以上の点に鑑みなされたものであ
り、発生磁場を大幅に引き上げることを可能としたＮＭ
Ｒ分析用超電導マグネットを提供することを目的とする
ものである。The present invention has been made in view of the above points, and it is possible to significantly increase the generated magnetic field.
It is intended to provide a superconducting magnet for R analysis.
【０００５】[0005]
【課題を解決するための手段】上記目的は、酸化物超電
導線を使用した主コイルと、この主コイルの外周に金属
系超電導線を使用したシムコイルとを持ち、これら主コ
イルおよびシムコイルを液体ヘリウムを収納したクライ
オスタット内に配置することにより、達成される。The above object is to have a main coil using an oxide superconducting wire and a shim coil using a metal superconducting wire on the outer periphery of the main coil, and the main coil and the shim coil are liquid helium. This is achieved by placing the inside of the cryostat.
【０００６】[0006]
【作用】上記手段を設けたので、金属系超電体では容易
に発生できない１５Ｔ以上の高磁界が発生できるように
なる。Since the above-mentioned means is provided, it becomes possible to generate a high magnetic field of 15 T or more, which cannot be easily generated by the metal-based superconductor.
【０００７】すなわち磁場発生のための主コイルの超電
導線としてＢｉ−Ｓｒ−Ｃａ−Ｃｕ−Ｏ、Ｙ−Ｂａ−Ｃ
ｕ−Ｏ等の酸化物超電導線を使用する。これらの材料は
臨界磁界が１００Ｔ程度であるので、液体ヘリウム
（４．２Ｋ）温度において２０Ｔの磁場発生が可能にな
る。ＮＭＲ分析装置の分解能は用いる磁場が高くなるほ
ど上がる。That is, Bi-Sr-Ca-Cu-O and Y-Ba-C are used as the superconducting wire of the main coil for generating a magnetic field.
An oxide superconducting wire such as u-O is used. Since these materials have a critical magnetic field of about 100T, it is possible to generate a magnetic field of 20T at a liquid helium (4.2K) temperature. The resolution of the NMR analyzer increases as the magnetic field used increases.
【０００８】ところで酸化物超電導線はセラミックスな
ので、くら型コイルを含む複雑な形状のシムコイルを形
成するのは難しい。幸いにしてコイル外周では磁場は比
較的低くなっているので従来のＮｂＴｉ超電導線を使用
することができる。By the way, since the oxide superconducting wire is a ceramic, it is difficult to form a shim coil having a complicated shape including a paddle coil. Fortunately, since the magnetic field is relatively low on the outer circumference of the coil, the conventional NbTi superconducting wire can be used.
【０００９】そこで本発明ではシムコイルには金属系の
ＮｂＴｉ超電導線を使用する。また、主コイルは必要に
応じて内層、外層の２ケ以上のコイルに分けてもよく、
その場合は内層に酸化物超電導線を用い、外層にはＮｂ
Ｔｉ超電導線を使用する。Therefore, in the present invention, a metallic NbTi superconducting wire is used for the shim coil. Further, the main coil may be divided into two or more coils of an inner layer and an outer layer, if necessary,
In that case, an oxide superconducting wire is used for the inner layer and Nb is used for the outer layer.
A Ti superconducting wire is used.
【００１０】[0010]
【実施例】次に本発明を実施例により具体的に説明す
る。EXAMPLES Next, the present invention will be specifically described by way of examples.
【００１１】〔実施例１〕図１には本発明の一実施例が
示されている。本実施例では酸化物超電導線を使用した
主コイル１と、この主コイル１の外周に金属系超電導線
を使用したシムコイル２とを持ち、これら主コイル１お
よびシムコイル２を液体ヘリウムを収納したクライオス
タット内に配置した。このようにすることにより、金属
系超電線では容易に発生できない１５Ｔ以上の高磁界が
発生できるようになって、発生磁場を大幅に引き上げる
ことを可能としたＮＭＲ分析用超電導マグネットを得る
ことができる。[Embodiment 1] FIG. 1 shows an embodiment of the present invention. In the present embodiment, a cryostat having a main coil 1 using an oxide superconducting wire and a shim coil 2 using a metal superconducting wire on the outer periphery of the main coil 1 and storing the main coil 1 and the shim coil 2 with liquid helium Placed inside. By doing so, it is possible to generate a high magnetic field of 15 T or more, which cannot be easily generated by a metal-based super electric wire, and it is possible to obtain a superconducting magnet for NMR analysis capable of significantly increasing the generated magnetic field. .
【００１２】すなわち同図で１ａ、１ｂ、１ｃは磁場発
生用の主コイル１であり、２が磁場変歪矯正用のシムコ
イル群である。That is, in the figure, reference numerals 1a, 1b, and 1c are main coils 1 for generating a magnetic field, and 2 is a shim coil group for correcting magnetic field distortion.
【００１３】本実施例で１ａは高磁場発生用のＢｉＳｒ
ＣａＣｕＯ酸化物超電導線を使用した内層コイルの酸化
物超電導線コイル、１ｂは金属系超電導体であるＮｂＴ
ｉ超電導線を用い、７Ｔを発生する外層コイルのＮｂＴ
ｉ超電導線コイル、１ｃは磁場分布を平坦化するための
ＮｂＴｉ超電導線を用いたサブコイルのＮｂＴｉ超電導
線サブコイルである。In this embodiment, 1a is BiSr for generating a high magnetic field.
Inner layer coil oxide superconducting wire coil using CaCuO oxide superconducting wire, 1b is NbT which is a metal-based superconductor
NbT of outer layer coil that generates 7T using i superconducting wire
i superconducting wire coil 1c is an NbTi superconducting wire subcoil of a subcoil using an NbTi superconducting wire for flattening the magnetic field distribution.
【００１４】２はシムコイル群であるが、くら型コイル
を含み、コイル形状が複雑であるため巻線自在なＮｂＴ
ｉ超電導線を用いている。Reference numeral 2 denotes a shim coil group, which includes a paddle-shaped coil and has a complicated coil shape, so that it can be freely wound.
i Superconducting wire is used.
【００１５】３は主コイル１とは逆向きの電流を通じ、
コイル外部空間の磁場強度を低減させるシールド用の自
己シールドコイルであり、ＮｂＴｉ超電導線を使用する
こともできるし、ＢｉＳｒＣａＣｕＯ等の酸化物超電導
線を使用することもできる。3 passes a current in the direction opposite to that of the main coil 1,
It is a self-shielding coil for shielding that reduces the magnetic field strength in the space outside the coil, and can use NbTi superconducting wire or oxide superconducting wire such as BiSrCaCuO.
【００１６】以上のコイル１、２、３全体を一括して液
体ヘリウム槽４の中に収容し、全体を液体ヘリウム温度
４．２ｋで動作させる。このようにすことにより金属系
超電導体では容易に発生できない１５Ｔ以上の高磁界を
発生させることができる。All of the above coils 1, 2, and 3 are housed together in a liquid helium bath 4, and the whole is operated at a liquid helium temperature of 4.2k. By doing so, it is possible to generate a high magnetic field of 15 T or more, which cannot be easily generated by the metal-based superconductor.
【００１７】このように本実施例によればＢｉＳｒＣａ
ＣｕＯ、ＹＢａＣｕＯ等は１００Ｔ以上の上部磁界磁場
ＨC2を有するため、１５Ｔ以上の高磁界を発生すること
ができる。Thus, according to this embodiment, BiSrCa is
Since CuO, YBaCuO, and the like have an upper magnetic field H C2 of 100 T or more, a high magnetic field of 15 T or more can be generated.
【００１８】[0018]
【発明の効果】上述のように本発明は、酸化物超電導線
を使用した主コイルと、この主コイルの外周に金属系超
電導線を使用したシムコイルとを持ち、これら主コイル
およびシムコイルを液体ヘリウムを収納したクライオス
タット内に配置したので、金属系超電体では容易に発生
できない１５Ｔ以上の高磁界が発生できるようになっ
て、発生磁場を大幅に引き上げることを可能としたＮＭ
Ｒ分析用超電導マグネットを得ることができる。As described above, the present invention has a main coil using an oxide superconducting wire and a shim coil using a metal superconducting wire on the outer periphery of this main coil, and these main coil and shim coil are liquid helium. Since it was placed in the cryostat that housed it, it became possible to generate a high magnetic field of 15T or more, which could not be easily generated by a metal-based superconductor, and it was possible to significantly raise the generated magnetic field.
A superconducting magnet for R analysis can be obtained.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明のＮＭＲ分析用超電導マグネットの一実
施例の縦断側面図である。FIG. 1 is a vertical side view of an embodiment of a superconducting magnet for NMR analysis of the present invention.
１ 主コイル １ａ 酸化物超電導線コイル １ｂ ＮｂＴｉ超電導線コイル １ｃ ＮｂＴｉ超電導線サブコイル ２ ＮｂＴｉ超電導線シムコイル ３ 自己シールドコイル ４ 液体ヘリウム槽 1 Main coil 1a Oxide superconducting wire coil 1b NbTi superconducting wire coil 1c NbTi superconducting wire sub-coil 2 NbTi superconducting wire shim coil 3 Self-shielding coil 4 Liquid helium tank
Claims (3)
の主コイルの外周に金属系超電導線を使用したシムコイ
ルとを持ち、これら主コイルおよびシムコイルが液体ヘ
リウムを収納したクライオスタット内に配置されたもの
であることを特徴とするＮＭＲ分析用超電導マグネッ
ト。1. A main coil using an oxide superconducting wire and a shim coil using a metal superconducting wire on the outer periphery of the main coil, the main coil and the shim coil being arranged in a cryostat containing liquid helium. A superconducting magnet for NMR analysis, characterized in that
タット外空間に対して自己シールド機能を有する自己シ
ールドコイルを備えたものである請求項１記載のＮＭＲ
分析用超電導マグネット。2. The NMR according to claim 1, wherein the superconducting magnet has a self-shielding coil having a self-shielding function with respect to the space outside the cryostat.
Superconducting magnet for analysis.
超電導線を使用した超電導コイルと、この外側に配置さ
れた金属系超電導線を使用した超電導コイルとで構成さ
れたものである請求項１記載のＮＭＲ分析用超電導マグ
ネット。3. The main coil is composed of a superconducting coil using an oxide superconducting wire arranged inside and a superconducting coil using a metallic superconducting wire arranged outside this. Item 1. A superconducting magnet for NMR analysis according to Item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15692A JPH05182828A (en) | 1992-01-06 | 1992-01-06 | Superconducting magnet for nmr analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15692A JPH05182828A (en) | 1992-01-06 | 1992-01-06 | Superconducting magnet for nmr analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05182828A true JPH05182828A (en) | 1993-07-23 |
Family
ID=11466182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15692A Pending JPH05182828A (en) | 1992-01-06 | 1992-01-06 | Superconducting magnet for nmr analysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05182828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09153408A (en) * | 1995-11-30 | 1997-06-10 | Hitachi Medical Corp | Superconducting magnet device |
| JP2014068001A (en) * | 2012-08-31 | 2014-04-17 | Bruker Biospin Gmbh | Magnet system for generating highly stable magnetic field |
-
1992
- 1992-01-06 JP JP15692A patent/JPH05182828A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09153408A (en) * | 1995-11-30 | 1997-06-10 | Hitachi Medical Corp | Superconducting magnet device |
| JP2014068001A (en) * | 2012-08-31 | 2014-04-17 | Bruker Biospin Gmbh | Magnet system for generating highly stable magnetic field |
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