JP2012023160A - Strong magnetic field small superconducting magnet - Google Patents

Strong magnetic field small superconducting magnet Download PDF

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JP2012023160A
JP2012023160A JP2010159226A JP2010159226A JP2012023160A JP 2012023160 A JP2012023160 A JP 2012023160A JP 2010159226 A JP2010159226 A JP 2010159226A JP 2010159226 A JP2010159226 A JP 2010159226A JP 2012023160 A JP2012023160 A JP 2012023160A
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magnetic field
temperature superconducting
superconducting bulk
bulk body
gadolinium
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JP5583502B2 (en
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Masaru Tomita
優 富田
Yusuke Fukumoto
祐介 福本
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Railway Technical Research Institute
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Abstract

PROBLEM TO BE SOLVED: To provide a strong magnetic field small superconducting magnet which can enhance a generated magnetic field significantly by determining both the JcB (characteristic critical magnetic field characteristics under magnetic field) of each superconducting material and the arrangement thereof.SOLUTION: The strong magnetic field small superconducting magnet comprises a first high temperature superconducting bulk body 31, a gadolinium based second high temperature superconducting bulk body 32 laminated on the first high temperature superconducting bulk body 31, a gadolinium based third high temperature superconducting bulk body 33 laminated on the gadolinium based second high temperature superconducting bulk body 32, and a fourth high temperature superconducting bulk body 34 laminated on the gadolinium based third high temperature superconducting bulk body 33.

Description

本発明は、強磁場小型超電導マグネットに係り、特に、直線的で均一な強い磁場を発生できる強磁場小型超電導マグネットに関するものである。   The present invention relates to a strong magnetic field small superconducting magnet, and more particularly to a strong magnetic field small superconducting magnet capable of generating a linear and uniform strong magnetic field.

従来、高温超電導バルク体の機械的特性向上の研究が行われており、樹脂含侵により発生磁場の安定化を図るようにしている（下記特許文献１参照）。
また、高磁場における発熱除去対策の研究が行われており、金属含侵により高温超電導で世界最高記録を達成している（下記特許文献２参照）。
また、本発明者らにより、「環状ＹＢＣＯの永久モードマグネット」（下記非特許文献１参照）について開示され、マイクロＮＭＲ用永久マグネットとしての適用が行われている。 Conventionally, studies have been made on improving the mechanical properties of a high-temperature superconducting bulk body, and the generated magnetic field is stabilized by resin impregnation (see Patent Document 1 below).
Also, research on heat removal measures in a high magnetic field has been conducted, and the world's highest record has been achieved in high-temperature superconductivity due to metal impregnation (see Patent Document 2 below).
In addition, the present inventors have disclosed a “cyclic YBCO permanent mode magnet” (see Non-Patent Document 1 below), which is applied as a permanent magnet for micro NMR.

特許第３１４４６７５号公報Japanese Patent No. 3144675 特許第３８５８２２１号公報Japanese Patent No. 3858221

ＩＥＥＥ ＴＲＡＮＳＡＣＴＩＯＮＳ ＯＮ ＡＰＰＬＩＥＤ ＳＵＰＥＲＣＯＮＤＵＣＴＩＶＩＴＹ，ＶＯＬ．１５，ＮＯ．２ ＪＵＮＥ ２００５，ｐｐ．２３５２〜２３５５IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, VOL. 15, NO. 2 JUNE 2005, pp. 2352-2355

これまで、高温超電導バルク体やプレート状の高温超電導マグネットからなる薄い層状の環状マグネットを使うことによって、磁場の捕捉は積層数に応じて変わると考えられていた。
本発明は、個々の超電導材料のＪｃＢ（磁場下における特性臨界磁場特性）とその配置の双方を決定することによって、発生磁場を飛躍的に向上させることができる強磁場小型超電導マグネットを提供することを目的とする。 Until now, it was thought that the capture of a magnetic field changed according to the number of layers by using a thin layered annular magnet made of a high-temperature superconducting bulk material or a plate-like high-temperature superconducting magnet.
The present invention provides a high magnetic field small superconducting magnet capable of dramatically improving the generated magnetic field by determining both the JcB (characteristic critical magnetic field characteristics under magnetic field) of each superconducting material and its arrangement. With the goal.

本発明は、上記目的を達成するために、
〔１〕強磁場小型超電導マグネットにおいて、第１の高温超電導バルク体と、この第１の高温超電導バルク体上に積層されるガドリニウム系の第２の高温超電導バルク体と、このガドリニウム系の第２の高温超電導バルク体上に積層されるガドリニウム系の第３の高温超電導バルク体と、このガドリニウム系の第３の高温超電導バルク体上に積層される第４の高温超電導バルク体とを具備することを特徴とする。 In order to achieve the above object, the present invention provides
[1] In a high magnetic field small superconducting magnet, a first high-temperature superconducting bulk body, a gadolinium-based second high-temperature superconducting body stacked on the first high-temperature superconducting bulk body, and a second gadolinium-based superconducting magnet. A gadolinium-based third high-temperature superconducting bulk body laminated on the high-temperature superconducting bulk body, and a fourth high-temperature superconducting bulk body laminated on the gadolinium-based third high-temperature superconducting bulk body. It is characterized by.

〔２〕上記〔１〕記載の強磁場小型超電導マグネットにおいて、前記第１乃至第４の高温超電導バルク体は、積層後の寸法が外径８７ｍｍ、内径４８ｍｍ、高さ２２ｍｍである、樹脂含浸を施した環状の高温超電導バルク体であることを特徴とする。
〔３〕上記〔１〕又は〔２〕記載の強磁場小型超電導マグネットにおいて、前記積層した高温超電導バルク体を大気圧下で液体窒素冷却することにより、直線的で均一な２テスラレベルの磁場空間を発生させる永久マグネットとすることを特徴とする。 [2] In the strong magnetic field small superconducting magnet according to [1], the first to fourth high-temperature superconducting bulk bodies are impregnated with a resin having dimensions of an outer diameter of 87 mm, an inner diameter of 48 mm, and a height of 22 mm. It is characterized by being an annular high temperature superconducting bulk body.
[3] In the strong magnetic field small superconducting magnet according to the above [1] or [2], the laminated high-temperature superconducting bulk body is cooled with liquid nitrogen under atmospheric pressure, whereby a linear and uniform magnetic field space of 2 Tesla level is obtained. It is characterized by making it a permanent magnet which generates.

〔４〕上記〔３〕記載の強磁場小型超電導マグネットにおいて、前記永久マグネットをマイクロＮＭＲ用永久マグネットとして用いることを特徴とする。   [4] The strong magnetic field small superconducting magnet according to [3], wherein the permanent magnet is used as a permanent magnet for micro NMR.

本発明によれば、少ない個数の積層された高温超電導バルク体で空間に高品質の磁場、つまり、直線的で均一な磁場を発生することができる。また、小型で簡易輸送が可能であり、低温下での使用に適した、強い磁場を発生させることができる。   According to the present invention, a high-quality magnetic field, that is, a linear and uniform magnetic field can be generated in a space with a small number of stacked high-temperature superconducting bulk bodies. In addition, it is small and can be easily transported, and can generate a strong magnetic field suitable for use at low temperatures.

本発明にかかる樹脂含浸を施した高温超電導バルク体の磁場測定の様子を示す模式図である。It is a schematic diagram which shows the mode of the magnetic field measurement of the high-temperature superconducting bulk body which gave resin impregnation concerning this invention. 本発明に係る高温超電導バルク体の積層数（１〜３）と半径方向距離に対する磁場値を示す図である。It is a figure which shows the magnetic field value with respect to the lamination | stacking number (1-3) and radial direction distance of the high-temperature superconducting bulk body which concerns on this invention. 本発明に係る高温超電導バルク体の積層数（１〜１０）と高さ方向距離に対する磁場値を示す図である。It is a figure which shows the magnetic field value with respect to the lamination | stacking number (1-10) and height direction distance of the high-temperature superconducting bulk body which concerns on this invention. 本発明の４個積層された高温超電導バルク体による強磁場小型超電導マグネットを示す図である。It is a figure which shows the strong magnetic field small-sized superconducting magnet by the four high-temperature superconducting bulk body of this invention laminated | stacked. 本発明の４個積層された高温超電導バルク体による強磁場小型超電導マグネットの高さ方向距離に対する磁場値を示す図である。It is a figure which shows the magnetic field value with respect to the height direction distance of the strong magnetic field small superconducting magnet by the four-layered high-temperature superconducting bulk body of this invention. 本発明の４個積層された高温超電導バルク体による強磁場小型超電導マグネットの半径方向距離に対する磁場値を示す図である。It is a figure which shows the magnetic field value with respect to the radial direction distance of the strong magnetic field small superconducting magnet by the four-layered high-temperature superconducting bulk body of this invention.

本発明の強磁場小型超電導マグネットは、第１の高温超電導バルク体と、この第１の高温超電導バルク体上に積層されるガドリニウム系の第２の高温超電導バルク体と、このガドリニウム系の第２の高温超電導バルク体上に積層されるガドリニウム系の第３の高温超電導バルク体と、このガドリニウム系の第３の高温超電導バルク体上に積層される第４の高温超電導バルク体とを具備する。   The high magnetic field small superconducting magnet of the present invention includes a first high-temperature superconducting bulk body, a gadolinium-based second high-temperature superconducting bulk laminated on the first high-temperature superconducting bulk body, and a second gadolinium-based superconducting magnet. A gadolinium-based third high-temperature superconducting bulk body laminated on the high-temperature superconducting bulk body, and a fourth high-temperature superconducting bulk body laminated on the gadolinium-based third high-temperature superconducting bulk body.

以下、本発明の実施の形態について詳細に説明する。
図１は本発明にかかる樹脂含浸を施した高温超電導バルク体の磁場測定の様子を示す模式図である。
複数個の樹脂含浸を施した高温超電導バルク体１（ここでは２個）を積層し、その内径ｒの中心位置にホール素子２を配置して、磁場の測定を行うようにしている。なお、この測定では、内径ｒの中心位置を０として半径方向の距離を示し、高温超電導バルク体１を積層した高さの１／２の位置を０として高さ方向の距離を示している。 Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a schematic diagram showing a state of magnetic field measurement of a high-temperature superconducting bulk body impregnated with resin according to the present invention.
A plurality of high-temperature superconducting bulk bodies 1 (two in this case) subjected to resin impregnation are stacked, and a Hall element 2 is arranged at the center position of the inner diameter r to measure the magnetic field. In this measurement, the distance in the radial direction is shown with the center position of the inner diameter r being 0, and the distance in the height direction is shown with 0 being the position of half the height at which the high-temperature superconducting bulk material 1 is stacked.

図２は本発明に係る高温超電導バルク体の積層数（１〜３）と半径方向距離に対する磁場値を示す図、図３は高温超電導バルク体の積層数（１〜１０）と高さ方向距離に対する磁場値を示す図である。
図２に示すように、高温超電導バルク体を複数個積層することによって、より均一な磁場を得られることがわかる。 FIG. 2 is a diagram showing the number of stacked high-temperature superconducting bodies (1-3) and the magnetic field value with respect to the radial distance according to the present invention, and FIG. 3 is the number of stacked high-temperature superconducting bodies (1-10) and the distance in the height direction. It is a figure which shows the magnetic field value with respect to.
As shown in FIG. 2, it can be seen that a more uniform magnetic field can be obtained by stacking a plurality of high-temperature superconducting bulk bodies.

また、図３において、１１〜２０は高さ方向の磁場分布の解析値を示しており、１１は環状の高温超電導バルク体が１層の場合、以下、環状の高温超電導バルク体がそれぞれ、１２は２層の場合、１３は３層の場合、１４は４層の場合、１５は５層の場合、１６は６層の場合、１７は７層の場合、１８は８層の場合、１９は９層の場合、２０は１０層の場合を示している。また、２１〜２３は１層〜３層の場合の実測値である。図３に示すように、高温超電導バルク体の積層数を増やすことによって、より強い磁場を発生させることできることがわかる。   In addition, in FIG. 3, 11 to 20 indicate analytical values of the magnetic field distribution in the height direction, and 11 is an annular high-temperature superconducting bulk body having one layer. Is 2 layers, 13 is 3 layers, 14 is 4 layers, 15 is 5 layers, 16 is 6 layers, 17 is 7 layers, 18 is 8 layers, 19 is In the case of 9 layers, 20 indicates the case of 10 layers. 21 to 23 are actually measured values in the case of 1 to 3 layers. As shown in FIG. 3, it can be seen that a stronger magnetic field can be generated by increasing the number of stacked high-temperature superconducting bulk bodies.

このように、高温超電導バルク体を複数個積層することによって、均一で強い磁場を得られることがわかった。
図４は本発明の４個積層された高温超電導バルク体による強磁場小型超電導マグネットを示す図、図５はその強磁場小型超電導マグネットの高さ方向距離に対する磁場値を示す図、図６はその強磁場小型超電導マグネットの半径方向距離に対する磁場値を示す図である。 Thus, it was found that a uniform and strong magnetic field can be obtained by stacking a plurality of high-temperature superconducting bulk bodies.
FIG. 4 is a diagram showing a high magnetic field small superconducting magnet using four stacked high-temperature superconducting bulk bodies according to the present invention, FIG. 5 is a diagram showing magnetic field values with respect to the height direction distance of the strong magnetic field small superconducting magnet, and FIG. It is a figure which shows the magnetic field value with respect to the radial direction distance of a strong magnetic field small superconducting magnet.

図４に示すように、第１の高温超電導バルク体３１、ガドリニウム系（Ｇａ−Ｂ−Ｃｕ−Ｏ）の第２の高温超電導バルク体３２、ガドリニウム系（Ｇａ−Ｂ−Ｃｕ−Ｏ）の第３の高温超電導バルク体３３、第４の高温超電導バルク体３４を積層した。ここでは、内径は４８ｍｍ（樹脂層を除くと５０ｍｍ）、外径は８７ｍｍ（８０ｍｍ）、高さは２２ｍｍ（２０ｍｍ）である。   As shown in FIG. 4, the first high-temperature superconducting bulk body 31, the gadolinium-based (Ga—B—Cu—O) second high-temperature superconducting bulk body 32, and the gadolinium-based (Ga—B—Cu—O) second 3 high temperature superconducting bulk body 33 and a fourth high temperature superconducting bulk body 34 were laminated. Here, the inner diameter is 48 mm (50 mm excluding the resin layer), the outer diameter is 87 mm (80 mm), and the height is 22 mm (20 mm).

図５及び図６から明らかなように、中心の２個にガドリニウム系高温超電導バルク体を用いた本発明の強磁場小型超電導マグネットによって、直線的で均一な強い磁場空間３５を少数の高温超電導バルク体で発生させることができる。
上記したように、環状に加工した外径８７ｍｍの超電導バルク体を積層し、大気圧下で液体窒素冷却することによって、４８ｍｍ径の空間に２．０２テスラの安定した磁場空間が得られることを実証した。なお、本発明によれば、少数の高温超電導バルク体の積層により、ボア径４０ｍｍ以上で発生磁場強度が２テスラ以上の小口径の強磁場小型超電導マグネットが実現できた。 As apparent from FIG. 5 and FIG. 6, the strong and small magnetic field superconducting magnet of the present invention using the gadolinium-based high temperature superconducting bulk body at the two centers makes a linear and uniform strong magnetic field space 35 a small number of high temperature superconducting bulks. Can be generated in the body.
As described above, a superconducting bulk body with an outer diameter of 87 mm processed into an annular shape is stacked and cooled with liquid nitrogen under atmospheric pressure, so that a stable magnetic field space of 2.02 Tesla can be obtained in a 48 mm diameter space. Demonstrated. According to the present invention, by stacking a small number of high-temperature superconducting bulk bodies, a small magnetic field superconducting magnet with a bore diameter of 40 mm or more and a generated magnetic field strength of 2 Tesla or more can be realized.

なお、本発明は上記実施例に限定されるものではなく、本発明の趣旨に基づき種々の変形が可能であり、これらを本発明の範囲から排除するものではない。   In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

本発明の強磁場小型超電導マグネットは、少数の高温超電導バルク体により、直線的で均一な磁場を発生させることができるので、マイクロＮＭＲなどに利用可能である。   The strong magnetic field small superconducting magnet of the present invention can generate a linear and uniform magnetic field with a small number of high-temperature superconducting bulk bodies, and thus can be used for micro NMR and the like.

１ 高温超電導バルク体
２ ホール素子
１１〜２０ 環状の高温超電導バルク体の積層数１〜１０の場合の磁場分布の解析値
２１〜２３ 環状の高温超電導バルク体の積層数１〜３の場合の磁場分布の実測値
３１ 第１の高温超電導バルク体
３２ ガドリニウム系（Ｇａ−Ｂ−Ｃｕ−Ｏ）の第２の高温超電導バルク体
３３ ガドリニウム系（Ｇａ−Ｂ−Ｃｕ−Ｏ）の第３の高温超電導バルク体
３４ 第４の高温超電導バルク体
３５ 磁場空間 DESCRIPTION OF SYMBOLS 1 High-temperature superconducting bulk body 2 Hall element 11-20 Analytical value of magnetic field distribution in the case of the number of stacks of the annular high-temperature superconducting bulk body 1-10 21-23 Measured value of distribution 31 First high-temperature superconducting bulk material 32 Gadolinium-based (Ga—B—Cu—O) second high-temperature superconducting bulk material 33 Gadolinium-based (Ga—B—Cu—O) third high-temperature superconducting material Bulk body 34 Fourth high-temperature superconducting bulk body 35 Magnetic field space

Claims (4)

（ａ）第１の高温超電導バルク体と、
（ｂ）該第１の高温超電導バルク体上に積層されるガドリニウム系の第２の高温超電導バルク体と、
（ｃ）該ガドリニウム系の第２の高温超電導バルク体上に積層されるガドリニウム系の第３の高温超電導バルク体と、
（ｄ）該ガドリニウム系の第３の高温超電導バルク体上に積層される第４の高温超電導バルク体とを具備することを特徴とする強磁場小型超電導マグネット。 (A) a first high-temperature superconducting bulk body;
(B) a gadolinium-based second high-temperature superconducting bulk body laminated on the first high-temperature superconducting bulk body;
(C) a gadolinium-based third high-temperature superconducting bulk body laminated on the gadolinium-based second high-temperature superconducting bulk body;
(D) A high-field small-sized superconducting magnet comprising a fourth high-temperature superconducting bulk body laminated on the gadolinium-based third high-temperature superconducting bulk body. 請求項１記載の強磁場小型超電導マグネットにおいて、前記第１乃至第４の高温超電導バルク体は、積層後の寸法が外径８７ｍｍ、内径４８ｍｍ、高さ２２ｍｍである、樹脂含浸を施した環状の高温超電導バルク体であることを特徴とする強磁場小型超電導マグネット。   2. The high-field small superconducting magnet according to claim 1, wherein the first to fourth high-temperature superconducting bulk bodies are annularly impregnated with a resin having dimensions of an outer diameter of 87 mm, an inner diameter of 48 mm, and a height of 22 mm after lamination. A high magnetic field small superconducting magnet characterized by being a high-temperature superconducting bulk material. 請求項１又は２記載の強磁場小型超電導マグネットにおいて、前記積層した高温超電導バルク体を大気圧下で液体窒素冷却することにより、直線的で均一な２テスラレベルの磁場空間を発生させる永久マグネットとすることを特徴とする強磁場小型超電導マグネット。   3. A high-field small superconducting magnet according to claim 1 or 2, wherein the laminated high-temperature superconducting bulk body is cooled with liquid nitrogen under atmospheric pressure, thereby generating a linear and uniform 2-Tesla level magnetic field space. A strong magnetic field compact superconducting magnet. 請求項３記載の強磁場小型超電導マグネットにおいて、前記永久マグネットをマイクロＮＭＲ用永久マグネットとして用いることを特徴とする強磁場小型超電導マグネット。   4. The strong magnetic field small superconducting magnet according to claim 3, wherein the permanent magnet is used as a permanent magnet for micro NMR.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102820116A (en) * 2012-05-04 2012-12-12 清华大学 High-temperature superconducting film magnet
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JPWO2018021507A1 (en) * 2016-07-27 2019-06-27 日本製鉄株式会社 Bulk magnet structure, NMR magnet system using the same, and magnetizing method of bulk magnet structure

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