JPH01239902A - Superconducting apparatus - Google Patents
Superconducting apparatusInfo
- Publication number
- JPH01239902A JPH01239902A JP63067618A JP6761888A JPH01239902A JP H01239902 A JPH01239902 A JP H01239902A JP 63067618 A JP63067618 A JP 63067618A JP 6761888 A JP6761888 A JP 6761888A JP H01239902 A JPH01239902 A JP H01239902A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- layer
- superconducting coil
- liquid nitrogen
- magnetic field
- 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.)
- Granted
Links
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は超電導装置、特に核磁気共鳴を利用した分析計
の超電導装置に適した超電導装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a superconducting device, particularly a superconducting device suitable for a superconducting device of an analyzer using nuclear magnetic resonance.
［従 来 技 術］
核磁気共鳴（Ｎｕｃｌｅａｒ Ｍａｇｎｅｔｉｃ Ｒｅ
５ｏｎａｎｃｅ）を利用した装置としては、医療用の画
像診断装置である！ｖｌ ＲＩ （Ｍａｇｎｅｔｉｃ
Ｒｅ５ｏｎａｎｃｅ Ｉｍａｇｉｎｇ）やＮＭ Ｒ分析
計が知られている。これらの装置では磁場を発生させる
磁石として永久磁石、常電導磁石、超電導磁石が使用さ
れているが、分解能が優れていることから超電導磁石を
用いたものの比率が高まってきている。[Conventional technology] Nuclear magnetic resonance
5onance) is a medical image diagnostic device! vl RI (Magnetic
Re5onance Imaging) and NMR analyzers are known. These devices use permanent magnets, normal conducting magnets, and superconducting magnets as magnets to generate magnetic fields, but the proportion of devices using superconducting magnets is increasing because of their superior resolution.
本発明を説明する好適な例として、超電導磁石を用いた
ＮＭＲ分析計を取り上げる。As a preferred example for explaining the present invention, an NMR analyzer using a superconducting magnet will be taken up.
Ｎ Ｍ Ｒ分析計の超電導装置は、中心軸周りに円孔を
有する超電導コイル、それを包むようにように配置され
た寒剤容器であるＬＨｅ （液体ヘリウム）槽、輻射シ
ールド層となるＬＮ２ （液体窒素）槽及び最外層と
なる真空容器からなっている。装置の中心には常温ボア
と称する大気に開放されている空間が設けられていて、
超電導コイルを励磁することにより常温ボア内のコイル
の中心部分ては４〜１５Ｔ （テスラ）程度の極めて強
い磁界が発生するようになっている。この磁界内に生体
高分子等のサンプルを挿入し、該磁気共鳴現象を（り用
した分析を行う。The superconducting device of the NMR analyzer consists of a superconducting coil with a circular hole around its central axis, an LHe (liquid helium) tank that is a cryogen container placed around the superconducting coil, and an LN2 (liquid nitrogen) tank that serves as a radiation shield layer. ) tank and a vacuum container as the outermost layer. At the center of the device is a space open to the atmosphere called the normal temperature bore.
By exciting the superconducting coil, an extremely strong magnetic field of about 4 to 15 T (Tesla) is generated at the center of the coil in the room-temperature bore. A sample such as a biopolymer is inserted into this magnetic field and analyzed using the magnetic resonance phenomenon.
この場合、超電導コイルが発生する磁界は極めて大きく
、装置周辺の漏洩磁界も１０〜１００ガウス程度になる
ため注意が必要で、使用に当たっては超電導装置周囲の
半径１〜４ｍ以内に分析用の操作巾や他の機器を置くこ
とができず、また人間もサンプルをセットするとき以外
は立入基土にしており、極めてスペース効率が悪いもの
になっている。In this case, the magnetic field generated by the superconducting coil is extremely large, and the leakage magnetic field around the device is around 10 to 100 Gauss, so care must be taken. It is not possible to place the equipment or other equipment, and humans have to enter the base except when setting samples, making it extremely inefficient in terms of space.
漏洩磁界を小さくする方法として、従来から磁性体であ
る鋼板で周囲を覆う方法が提案されてはいるが、かなり
厚い調成を必要とするため全重量が数倍に増加し、あま
り実用的であるとはいえない。As a method to reduce the leakage magnetic field, it has been proposed to cover the surrounding area with a magnetic steel plate, but this requires a considerably thicker material, which increases the total weight several times, making it not very practical. I can't say that there is.
［発明が解決しようとしている課題］
本発明の目的は、前記した従来技術の欠点を解消し、装
置周辺のスペース効率を大幅に高めることのできる超電
導装置を提供することにある。[Problems to be Solved by the Invention] An object of the present invention is to provide a superconducting device that can eliminate the drawbacks of the prior art described above and can significantly improve the space efficiency around the device.
［課題を解決するための手段］
本発明の要旨は、漏洩磁場を小さくする手段として酸化
物超電導体を用いると共に、超電導コイルをその中心に
もってきたことにあり、それによって他の性能を損わず
に漏洩磁場を小さくしたことにある。[Means for Solving the Problems] The gist of the present invention is to use an oxide superconductor as a means to reduce leakage magnetic fields, and to place a superconducting coil in the center of the superconductor, thereby reducing other performances. The reason is that the leakage magnetic field has been reduced without any problems.
［実 施 例］ 本発明の実施例を第１図に示す。[Example] An embodiment of the invention is shown in FIG.
超電導コイル１を収納するクライオスタット（極低温容
器）は、ＬＨｅ槽２、ＬＮ２槽３．７７にシールド３−
１真空容器４からなり、ＬＨｅ槽２、ＬＮ２１６３には
それぞれ液を注入したり、ガスを排出するための導管７
．８が設けられている。The cryostat (cryogenic container) that houses the superconducting coil 1 has an LHe tank 2, an LN2 tank 3.77, and a shield 3-
1 vacuum container 4, and a conduit 7 for injecting liquid and discharging gas into the LHe tank 2 and LN2163, respectively.
．． 8 is provided.
ＬＮ２槽３と７７にシールド３″の周囲には７７ Ｋ（
液体窒素温度）で超電導特性を示す酸化物超電導体、例
えばＹ −Ｉ３ａ −Ｃｕ −０系、８１− Ｓｒ −
Ｃａ −ＣＬＩ−〇系等の超電導体の層１４が付されて
おり、その外側にはスーパーインシュレーション等と称
される多層断熱材の層１０が設けられている。77 K (
Oxide superconductors exhibiting superconducting properties at liquid nitrogen temperature), such as Y-I3a-Cu-0 series, 81-Sr-
A layer 14 of a superconductor such as Ca-CLI-0 is attached, and a layer 10 of a multilayer heat insulating material called super insulation is provided on the outside thereof.
超電導コイル１は酸化物超電導体層１４に対して半径方
向の中心（同心円状）にあるばかりでなく、軸方向でも
ほぼ中央に位置している。従って、磁界分布は上下対称
になり、ＮＭＲ分析計の超電導マグネットの性能として
重要な、磁場の均一度が低下することはない。The superconducting coil 1 is not only located at the center in the radial direction (concentrically) with respect to the oxide superconductor layer 14, but also approximately at the center in the axial direction. Therefore, the magnetic field distribution becomes vertically symmetrical, and the uniformity of the magnetic field, which is important for the performance of a superconducting magnet in an NMR analyzer, does not deteriorate.
励磁スイッチ類１１は、第１図では超電導コイル１の上
下に位置しているが、上か下の一方のみや、周囲に配置
させてもよい。励磁スイッチ１１とコネクタ１２との間
はリード線１３で結ばれている。Although the excitation switches 11 are located above and below the superconducting coil 1 in FIG. 1, they may be located only on either the top or the bottom or around the superconducting coil 1. A lead wire 13 connects the excitation switch 11 and the connector 12.
槽２には寒剤である液体ヘリウム５が、また槽３には液
体窒素６が適当量充填されており、これにより超電導コ
イル１と励磁スイッチ１１は４．２〜５に程度の超電導
を実現できるように維持されている。The tank 2 is filled with liquid helium 5, which is a cryogen, and the tank 3 is filled with an appropriate amount of liquid nitrogen 6, so that the superconducting coil 1 and the excitation switch 11 can achieve superconductivity of about 4.2 to 5. It is maintained as such.
超電導コイル１に電流を流して励磁するには、図示はし
ないが、パワーリードと称している電源線を導管７から
挿入し、その先端に着いているコネクタとクライオスタ
ット内にあるコネクタ１２とを結合し、超電導コイル１
に所定の電流を流して励磁する。ついて励磁スイッチ１
２を使用してループ７１Ｓ流にすることにより、超電導
コイル１はそこに永久電流が流れて超電導マグネットに
なると共に、常温ボア９内に′は均一度の高い（磁界強
度がほぼ一定）強い磁場が発生する。To excite the superconducting coil 1 by passing a current through it, a power wire called a power lead (not shown) is inserted from the conduit 7, and the connector attached to its tip is connected to the connector 12 inside the cryostat. and superconducting coil 1
A predetermined current is applied to the magnet to excite it. Excitation switch 1
2 to form a loop 71S flow, a persistent current flows through the superconducting coil 1 and it becomes a superconducting magnet. At the same time, a strong magnetic field with high uniformity (magnetic field strength is almost constant) is created in the room temperature bore 9. occurs.
超電導体は、良く知られているように磁力線を全く通さ
ない完全反磁性（マイスナー効果とも称される）の性質
がある。このため超電導コイル１から発生する磁力線は
常温ボア９の部分を除き、酸化物超電導体の層１４で見
掛上反射して閉じ込められることになる。この結果、ク
ライオスタ・ソト周囲の漏洩磁場の強さも大幅に減少し
、周辺のスペース効率が大幅に向上する。As is well known, superconductors have a completely diamagnetic property (also known as the Meissner effect) that does not allow any lines of magnetic force to pass through them. Therefore, the magnetic lines of force generated from the superconducting coil 1 are apparently reflected and confined by the oxide superconductor layer 14, except for the portion of the room-temperature bore 9. As a result, the strength of the leakage magnetic field around Cryostor Soto will also be significantly reduced, greatly improving the surrounding space efficiency.
こうして常温ボア９内に、図示はしないが、分析すべき
サンプルを内蔵したプローブを挿入することにより容易
に分析計として使用することができる。In this way, by inserting a probe containing a sample to be analyzed (not shown) into the normal temperature bore 9, it can be easily used as an analyzer.
この例では酸化物超電導体層１４をＬＮ２ｔ６６の外側
に配置したが、これはＬＮ２槽６の内側やＬＨｅＨＢＯ
２側ないしは内側に付けてもよい。In this example, the oxide superconductor layer 14 is placed outside the LN2t66, but it is placed inside the LN2 tank 6 or on the LHeHBO
It may be attached to the second side or inside.
また、図示はしないが、ＬＨｅｔｆ１５とＬＮ２冶６の
間に更に熱のシールド層を設置し、その熱シールド層に
酸化物超電導体の層１４を磁気シールドとして付加して
もよい。Although not shown, a heat shield layer may be further provided between the LHetf 15 and the LN2 layer 6, and an oxide superconductor layer 14 may be added to the heat shield layer as a magnetic shield.
［発明の効果］
以上の説明から明らかなように、本発明の装置は磁気シ
ールドに酸化物超電導体を用いてクライオスタット周囲
の漏洩磁場の強さを減少させているため、重量を殆んど
増加させることなく周囲のスペース効率を大幅に向上さ
せることができ、その実用価値は大なるものがある。[Effects of the Invention] As is clear from the above explanation, the device of the present invention uses an oxide superconductor for the magnetic shield to reduce the strength of the leakage magnetic field around the cryostat, so the weight is almost increased. It is possible to greatly improve the efficiency of the surrounding space without causing any problems, and its practical value is great.
第１図は本発明に係る超電導装置の一実施例を示す縦断
面図である。
１：超電導コイル、 ２：液体ヘリウム槽、３：液体窒
素槽、 ３゛：熱シールド、４：真空容器、 ５：液体
ヘリウム、
６：液 体 窒 素、 ９：常 温 ボ ア、１０：多
層断熱材層、 １４二酸化物超電導体層。
第１図
１：超電導コイル、 ２：液式ヘリウム層、
３．液体窒素層、３：熱シールド、 ４．真 空
容 器、 ５：液体ヘリウム、６：液体窒素、
７及び８：導 管、 ９：常温ボア、ｌＯ：多層断
熱材層、 １１・励磁スイッチ類、 １２：コ
ネ り タ、１３：リ − ド締、 １４二酸化物超
電導体層。FIG. 1 is a longitudinal sectional view showing an embodiment of a superconducting device according to the present invention. 1: Superconducting coil, 2: Liquid helium tank, 3: Liquid nitrogen tank, 3゛: Heat shield, 4: Vacuum container, 5: Liquid helium, 6: Liquid nitrogen, 9: Room temperature bore, 10: Multilayer insulation layer, 14 dioxide superconductor layer. Figure 1 1: Superconducting coil, 2: Liquid helium layer,
3. Liquid nitrogen layer, 3: Heat shield, 4. Vacuum container, 5: Liquid helium, 6: Liquid nitrogen,
7 and 8: Conduit, 9: Room temperature bore, lO: Multilayer insulation material layer, 11. Excitation switches, 12: Ko
13: Lead tightening, 14: Dioxide superconductor layer.
Claims (2)
その寒剤容器を包み輻射シールド層となる液体窒素容器
及びそれらを納めた真空容器からなる超電導装置におい
て、寒剤容器ないしは輻射シールド層に液体窒素温度で
超電導特性を示す酸化物超電導体の層を設けたことを特
徴とする超電導装置。(1) A cryogen container containing a superconducting coil and liquid helium,
In a superconducting device consisting of a liquid nitrogen container that encloses the cryogen container and serves as a radiation shield layer, and a vacuum container containing them, a layer of an oxide superconductor that exhibits superconducting properties at liquid nitrogen temperature is provided in the cryogen container or radiation shield layer. A superconducting device characterized by:
れた円孔を有し、かつ酸化物超電導体層の中心軸方向の
中心が超電導コイルの中心軸とほぼ一致していることを
特徴とする前記第１項記載の超電導装置。(2) The superconducting coil has a circular hole around the central axis that is open to the atmosphere at the top and bottom, and the center of the oxide superconductor layer in the central axis direction almost coincides with the central axis of the superconducting coil. The superconducting device according to item 1 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63067618A JP2596961B2 (en) | 1988-03-22 | 1988-03-22 | Superconducting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63067618A JP2596961B2 (en) | 1988-03-22 | 1988-03-22 | Superconducting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01239902A true JPH01239902A (en) | 1989-09-25 |
| JP2596961B2 JP2596961B2 (en) | 1997-04-02 |
Family
ID=13350139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63067618A Expired - Fee Related JP2596961B2 (en) | 1988-03-22 | 1988-03-22 | Superconducting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596961B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112509779A (en) * | 2020-10-29 | 2021-03-16 | 中国科学院合肥物质科学研究院 | Superconducting magnet system for space magnetic plasma thruster |
| CN114974790A (en) * | 2021-02-19 | 2022-08-30 | 住友重机械工业株式会社 | Superconducting magnet device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6289308A (en) * | 1985-10-15 | 1987-04-23 | Sumitomo Electric Ind Ltd | superconducting magnet |
| JPS6270499U (en) * | 1985-10-21 | 1987-05-02 |
-
1988
- 1988-03-22 JP JP63067618A patent/JP2596961B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6289308A (en) * | 1985-10-15 | 1987-04-23 | Sumitomo Electric Ind Ltd | superconducting magnet |
| JPS6270499U (en) * | 1985-10-21 | 1987-05-02 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112509779A (en) * | 2020-10-29 | 2021-03-16 | 中国科学院合肥物质科学研究院 | Superconducting magnet system for space magnetic plasma thruster |
| CN114974790A (en) * | 2021-02-19 | 2022-08-30 | 住友重机械工业株式会社 | Superconducting magnet device |
| JP2022127372A (en) * | 2021-02-19 | 2022-08-31 | 住友重機械工業株式会社 | Superconducting magnet device |
| US12169146B2 (en) | 2021-02-19 | 2024-12-17 | Sumitomo Heavy Industries, Ltd. | Superconducting magnet device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2596961B2 (en) | 1997-04-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |