JP5583501B2 - Simple superconducting magnet and manufacturing method thereof - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000011347 resin Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000009826 distribution Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 13
- 230000004907 flux Effects 0.000 description 6
- 239000013590 bulk material Substances 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 1
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Description
本発明は、簡易型超電導マグネット及びその製造方法に係り、特に、直線的で均一な磁場を発生することができる簡易型超電導マグネット及びその作製方法に関するものである。 The present invention relates to a simple superconducting magnet and a manufacturing method thereof, and more particularly to a simple superconducting magnet capable of generating a linear and uniform magnetic field and a manufacturing method thereof.
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）。 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).
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が達成されている（下記特許文献２参照）。 In addition, research on heat removal measures in a high magnetic field has been conducted, and the world's highest record in high-temperature superconductivity has been achieved by metal impregnation (see Patent Document 2 below).
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）が開示され、マイクロＮＭＲ用永久マグネットとしての適用が開示されている。 In addition, the present inventors have disclosed a “cyclic YBCO permanent mode magnet” (see Non-Patent Document 1 below), and its application as a permanent magnet for micro NMR.
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準じると考えられていたが、本発明は、個々の高温超電導バルク体の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簡易型超電導マグネット及びその作製方法を提供することを目的とする。 Until now, it was thought that the trapping of the magnetic field was based on the number of layers by using a thin layered annular magnet consisting of a high-temperature superconducting bulk material or a plate-shaped high-temperature superconducting magnet. It is an object of the present invention to provide a simple superconducting magnet capable of dramatically improving the generated magnetic field by determining both the JcB (characteristic critical magnetic field characteristics under magnetic field) and the arrangement thereof, and a method for producing the same. .
本発明は、上記目的を達成するために、
〔１〕簡易型超電導マグネットにおいて、超電導マグネットによりそれぞれ個別に着磁された、３個の樹脂を含浸した外径８７ｍｍ、内径４８ｍｍ、高さが２２ｍｍの環状の積層した高温超電導バルク体を、大気圧下の液体窒素冷却により、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小口径の簡易型の永久マグネットであることを特徴とする。
In order to achieve the above object, the present invention provides
[1] In a simple superconducting magnet, an annular laminated high-temperature superconducting bulk body with an outer diameter of 87 mm, an inner diameter of 48 mm, and a height of 22 mm impregnated with three resins individually magnetized by the superconducting magnet It is a simple permanent magnet with a small diameter that generates a linear and uniform magnetic field of 2 Tesla level by liquid nitrogen cooling under atmospheric pressure.
〔２〕上記〔１〕記載の簡易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。 [2] The simplified superconducting magnet according to [1], wherein the permanent magnet is used as a permanent magnet for micro NMR.
〔３〕簡易型超電導マグネットの作製方法において、３個の環状の高温超電導バルク体を用意し、この３個の環状の高温超電導バルク体のそれぞれを個別に超電導マグネットにより着磁し、前記個別に着磁された、外径８７ｍｍ、内径４８ｍｍ、高さが２２ｍｍの環状の積層した高温超電導バルク体を大気圧下の液体窒素冷却により、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小口径の簡易型の永久マグネットを作製することを特徴とする。 [3] In a method for producing a simple superconducting magnet, three annular high-temperature superconducting bulk bodies are prepared, and each of the three annular high-temperature superconducting bulk bodies is individually magnetized by the superconducting magnet, A magnetized, annular, high-temperature superconducting bulk body having an outer diameter of 87 mm, an inner diameter of 48 mm, and a height of 22 mm is cooled by liquid nitrogen under atmospheric pressure to generate a linear and uniform magnetic field space of 2 Tesla level. A simple permanent magnet having a caliber is produced.
ここで、個別に着磁する意味は、着磁手段として用いる超電導マグネットは磁場分布が存在する。最も磁場分布が均一な中心部においてそれぞれの超電導バルク体を着磁し併せ持つことで、均一な磁場を持つ超電導マグネットが製作できる。Here, the meaning of individually magnetizing is that a superconducting magnet used as a magnetizing means has a magnetic field distribution. A superconducting magnet having a uniform magnetic field can be manufactured by magnetizing and holding each superconducting bulk body in the central portion where the magnetic field distribution is most uniform.
〔４〕上記〔３〕記載の簡易型超電導マグネットの作製方法において、前記超電導マグネットが同一の超電導マグネットであり、この同一の超電導マグネットで前記高温超電導バルク体を個別に着磁することを特徴とする。 [4] The method for producing a simplified superconducting magnet according to [3], wherein the superconducting magnet is the same superconducting magnet, and the high-temperature superconducting bulk body is individually magnetized by the same superconducting magnet. To do.
本発明によれば、少ない３個の積層された高温超電導バルク体で、高品質の磁場、つまり直線的で均一な磁場を空間的に発生させることができ、簡易輸送が可能であって、その使用温度に適した小型で強い磁場を低温下で発生させることができる。 According to the present invention, it is possible to spatially generate a high-quality magnetic field, that is, a linear and uniform magnetic field, with a small number of three stacked high-temperature superconducting bulk bodies, and simple transportation is possible. A small and strong magnetic field suitable for the operating temperature can be generated at low temperatures.
本発明の簡易型超電導マグネットは、超電導マグネットによりそれぞれ個別に着磁された、３個の樹脂を含浸した外径８７ｍｍ、内径４８ｍｍ、高さが２２ｍｍの環状の積層した高温超電導バルク体を、大気圧下の液体窒素冷却により、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小口径の簡易型の永久マグネットである。 The simplified superconducting magnet of the present invention is a large-sized high-temperature superconducting bulk body with an outer diameter of 87 mm, an inner diameter of 48 mm, and a height of 22 mm impregnated with three resins individually magnetized by the superconducting magnet. It is a simple permanent magnet with a small diameter that generates a linear and uniform magnetic field of 2 Tesla level by liquid nitrogen cooling under atmospheric pressure.
以下、本発明の実施の形態について詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail.
図１は本発明の実施例を示す高温超電導バルク体の超電導マグネットによる着磁を用いた簡易型超電導マグネットの作製方法を示す模式図である。 FIG. 1 is a schematic view showing a method for producing a simplified superconducting magnet using magnetization of a high-temperature superconducting bulk body by a superconducting magnet according to an embodiment of the present invention.
まず、図１（ａ）に示すように、第１の環状の高温超電導バルク体１を超電導マグネット１１により着磁する。次に、図１（ｂ）に示すように、第２の環状の高温超電導バルク体２を超電導マグネット１１により着磁する。次に、図１（ｃ）に示すように、第３の環状の高温超電導バルク体３を超電導マグネット１１により着磁する。このように、超電導マグネット１１により個々の高温超電導バルク体１〜３を順次着磁する。 First, as shown in FIG. 1A, the first annular high-temperature superconducting bulk body 1 is magnetized by a superconducting magnet 11. Next, as shown in FIG. 1B, the second annular high-temperature superconducting bulk body 2 is magnetized by the superconducting magnet 11. Next, as shown in FIG. 1C, the third annular high-temperature superconducting bulk body 3 is magnetized by the superconducting magnet 11. In this way, the individual high-temperature superconducting bulk bodies 1 to 3 are sequentially magnetized by the superconducting magnet 11.
このようにして着磁された個々の高温超電導バルク体１〜３を用いて、図１（ｄ）に示すように、積層状に一体化した高温超電導バルク体１〜３による簡易型超電導マグネットを作製することができる。 Using the individual high-temperature superconducting bulk bodies 1 to 3 magnetized in this way, as shown in FIG. 1 (d), a simplified superconducting magnet made up of the high-temperature superconducting bulk bodies 1 to 3 integrated in a laminated form is used. Can be produced.
上記実施例では、第３の環状の高温超電導バルク体３まで示したが、これに限定されるものではなく、第ｎの環状の高温超電導バルク体までを着磁し積層してもよい。 In the above embodiment, the third annular high-temperature superconducting bulk body 3 is shown, but the present invention is not limited to this, and the n-th annular high-temperature superconducting bulk body may be magnetized and laminated.
この作製された簡易型超電導マグネットでは、一般の超電導マグネットでは得られない直線的で均一な磁場空間４を発生させることができる。 With the simple superconducting magnet thus produced, it is possible to generate a linear and uniform magnetic field space 4 that cannot be obtained with a general superconducting magnet.
図２は本発明の比較例を示す高温超電導バルク体の超電導マグネットによる着磁方法を示す模式図である。 FIG. 2 is a schematic diagram showing a method of magnetizing a high-temperature superconducting bulk body with a superconducting magnet according to a comparative example of the present invention.
図２（ａ）に示すように、あらかじめ高温超電導バルク体１０１〜１０３を積層状にしておき、これに対して、超電導マグネット１１１により着磁する。この場合、図２（ｂ）に示すように、超電導マグネット１１１によって着磁した積層状の高温超電導バルク体１０１〜１０３の磁場１０４は、均一にならず、また直線的にもならない。 As shown in FIG. 2A, the high-temperature superconducting bulk bodies 101 to 103 are laminated in advance, and are magnetized by the superconducting magnet 111. In this case, as shown in FIG. 2B, the magnetic field 104 of the stacked high-temperature superconducting bulk bodies 101 to 103 magnetized by the superconducting magnet 111 is not uniform or linear.
次に、環状の高温超電導バルク体の積層による簡易型超電導マグネットについて説明する。 Next, a simple superconducting magnet by laminating an annular high temperature superconducting bulk body will be described.
図３は本発明の実施例を示す高温超電導バルク体を示す図であり、図３（ａ）は樹脂を含浸した高温超電導バルク体の平面を示す図面代用写真、図３（ｂ）は樹脂を剥がした高温超電導バルク体の斜視図である。図４はその高温超電導バルク体の積層数とその中心磁場の測定値及び解析値を示す図である。 FIG. 3 is a diagram showing a high-temperature superconducting bulk body according to an embodiment of the present invention. FIG. 3 (a) is a drawing-substituting photograph showing the plane of the high-temperature superconducting body impregnated with resin, and FIG. It is a perspective view of the peeled high temperature superconducting bulk material. FIG. 4 is a diagram showing the number of stacked high-temperature superconducting bulk bodies and the measured and analyzed values of the central magnetic field.
樹脂を含浸した高温超電導バルク体２１は、内径４８ｍｍ，外径８７ｍｍ，高さが２２ｍｍであり、その高温超電導バルク体が１個又は２個のみの場合は、中心磁場の測定値は解析値から外れているが、高温超電導バルク体を３個以上積層すると、中心磁場の測定値は解析値と略一致するような特性を示す。図４から明らかなように、リング内部の磁場は単体では０．７５Ｔ（テスラ）であったが、環状の高温超電導バルク体を４個まで積層すると１．８Ｔ以上にすることができる。 The high-temperature superconducting bulk body 21 impregnated with resin has an inner diameter of 48 mm, an outer diameter of 87 mm, and a height of 22 mm. When the number of high-temperature superconducting bulk bodies is only one or two, the measured value of the central magnetic field is calculated from the analytical value. However, when three or more high-temperature superconducting bulk bodies are stacked, the measured value of the central magnetic field exhibits characteristics that substantially match the analytical values. As is apparent from FIG. 4, the magnetic field inside the ring was 0.75 T (Tesla) alone, but it can be increased to 1.8 T or more by stacking up to four annular high-temperature superconducting bulk bodies.
図５は本発明の実施例を示す樹脂を含浸した高温超電導バルク体が１個の場合の磁場分布の実測値を示す図であり、図５（ａ）は高温超電導バルク体の上端部（高さ２２ｍｍ）の磁場分布、図５（ｂ）は高温超電導バルク体の中心部（高さ１１ｍｍ）の磁場分布である。図６はその樹脂を含浸した高温超電導バルク体の下面から高さ方向の磁場分布を示す図、図７は樹脂を含浸した高温超電導バルク体の中心からの半径方向の磁場分布を示す模式図である。 FIG. 5 is a diagram showing measured values of the magnetic field distribution in the case where there is one high-temperature superconducting bulk body impregnated with a resin according to an embodiment of the present invention. FIG. The magnetic field distribution at 22 mm), FIG. 5B shows the magnetic field distribution at the center (height 11 mm) of the high-temperature superconducting bulk material. 6 is a diagram showing a magnetic field distribution in the height direction from the lower surface of the high-temperature superconducting bulk body impregnated with the resin, and FIG. 7 is a schematic diagram showing a magnetic field distribution in the radial direction from the center of the high-temperature superconducting bulk body impregnated with the resin. is there.
これらの図から明らかなように、１個の高温超電導バルク体２１を着磁して得られる磁場は、直線的で均一な磁場空間とはいえない。 As is clear from these figures, the magnetic field obtained by magnetizing one high-temperature superconducting bulk body 21 cannot be said to be a linear and uniform magnetic field space.
図８は本発明の実施例を示す樹脂を含浸した高温超電導バルク体の積層数が３個の場合の中心磁場の解析値を示す図であり、図８（ａ）はその高さ方向の寸法を示し、図８（ｂ）は３個の積層状の樹脂を含浸した高温超電導バルク体３１の上端部（高さ６６ｍｍ）の磁場分布、図８（ｃ）は３個の積層状の樹脂を含浸した高温超電導バルク体３１の中心部（高さ３３ｍｍ）の磁場分布である。 FIG. 8 is a diagram showing an analysis value of the central magnetic field when the number of stacked high-temperature superconducting bulk bodies impregnated with a resin according to an embodiment of the present invention is 3, and FIG. FIG. 8B shows the magnetic field distribution at the upper end (height 66 mm) of the high-temperature superconducting bulk body 31 impregnated with three laminated resins, and FIG. 8C shows the three laminated resins. This is a magnetic field distribution in the center (height 33 mm) of the impregnated high-temperature superconducting bulk body 31.
図９は本発明の実施例を示す３個の積層状の樹脂を含浸した高温超電導バルク体３１の下面からの高さ方向の磁場分布を示す図、図１０はその３個の積層状の樹脂を含浸した高温超電導バルク体３１の半径方向の磁場分布を示す模式図である。 FIG. 9 is a diagram showing the magnetic field distribution in the height direction from the lower surface of the high-temperature superconducting bulk body 31 impregnated with three laminated resins showing an embodiment of the present invention, and FIG. 10 is the three laminated resins. It is a schematic diagram which shows the magnetic field distribution of the radial direction of the high-temperature superconducting bulk body 31 impregnated with.
これらの図から明らかなように、上記した１個の樹脂を含浸した高温超電導バルク体２１の場合に比べて、３個の積層状の高温超電導バルク体３１を着磁して得られる磁場は、直線的で均一な磁場空間に近くなってきている。 As is clear from these figures, compared to the case of the high-temperature superconducting bulk body 21 impregnated with one resin as described above, the magnetic field obtained by magnetizing the three high-temperature superconducting bulk bodies 31 is: It is getting closer to a linear and uniform magnetic field space.
環状に加工した外径８７ｍｍの超電導バルク体を積層し、４８ｍｍ径の空間に大気圧下の液体窒素（ＬＮ2 ）冷却によって着磁することで、２．０２Ｔの安定した磁場空間が得られることが実証された。したがって、超電導バルクマグネットによる、ボア径が４０ｍｍ以上で発生磁場２Ｔ程度である小口径の簡易型超電導マグネットが実現できた。 A superconducting bulk body with an outer diameter of 87 mm processed into an annular shape is laminated and magnetized by cooling with liquid nitrogen (LN 2 ) under atmospheric pressure in a 48 mm diameter space, so that a stable magnetic field space of 2.02 T can be obtained. Has been demonstrated. Therefore, a simple superconducting magnet with a small diameter having a bore diameter of 40 mm or more and a generated magnetic field of about 2T by a superconducting bulk magnet could be realized.
従来の大型の高温超電導マクネットで着磁した場合と本発明の簡易型超電導マグネット着磁した場合の磁束の等高線プロットを具体的に対比すると以下のようになる。 The contour plots of the magnetic flux when magnetized with the conventional large-scale high-temperature superconducting macnet and the simplified superconducting magnet of the present invention are specifically compared as follows.
図１１は従来の大型の高温超電導マグネットで着磁した冷却システム〔液体窒素（ＬＮ2 ）冷却システム〕雰囲気での磁束Ｂの等高線プロット図、図１２は本発明の実施例を示す簡易型超電導マグネットの使用で高温超電導バルク体を冷却システム〔液体窒素（ＬＮ2 ）冷却システム〕雰囲気で着磁した磁束Ｂの等高線プロット図である。これらの図において、ｘ軸はｍｍ、ｙ軸はｍｍ、ｚ軸は磁束Ｂ（Ｔ：テスラ）である。 FIG. 11 is a contour plot of the magnetic flux B in a cooling system [liquid nitrogen (LN 2 ) cooling system] atmosphere magnetized by a conventional large high-temperature superconducting magnet, and FIG. 12 is a simplified superconducting magnet showing an embodiment of the present invention. 2 is a contour plot of magnetic flux B obtained by magnetizing a high-temperature superconducting bulk body in a cooling system [liquid nitrogen (LN 2 ) cooling system] atmosphere. In these drawings, the x-axis is mm, the y-axis is mm, and the z-axis is a magnetic flux B (T: Tesla).
これらの図から明らかなように、本発明の着磁された積層された複数個の環状の高温超電導バルク体は、大型の高温超電導マグネットで着磁したものと同等の着磁に成功している。したがって、本発明の簡易型超電導マグネットは、小型化され持ち運びが容易で、モバイル型であり、ＬＮ2 のみの冷却でコスト低減を図ることができる。 As is clear from these figures, the plurality of magnetized stacked annular high temperature superconducting bulk bodies of the present invention succeeded in magnetization equivalent to that magnetized by a large high temperature superconducting magnet. . Therefore, the simplified superconducting magnet of the present invention is downsized and easy to carry, is mobile, and can be reduced in cost only by cooling with LN 2 .
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.
本発明の簡易型超電導マグネット及びその作製方法は、３個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、簡易輸送が可能であって、その使用温度に適した小型で強い磁場を低温下で発生させることができるので、マイクロＮＭＲなどに利用可能でである。 The simple superconducting magnet of the present invention and the manufacturing method thereof can generate a linear and uniform magnetic field by three high-temperature superconducting bulk bodies, can be easily transported, and are small in size suitable for the use temperature. Since a strong magnetic field can be generated at a low temperature, it can be used for micro NMR and the like.
１ 第１の環状の高温超電導バルク体
２ 第２の環状の高温超電導バルク体
３ 第３の環状の高温超電導バルク体
４ 直線的で均一な磁場空間
１１ 超電導マグネット
２１ 樹脂を含浸した高温超電導バルク体
３１ ３個の積層状の樹脂を含浸した高温超電導バルク体
DESCRIPTION OF SYMBOLS 1 1st ring high temperature superconducting bulk body 2 2nd ring high temperature superconducting bulk body 3 3rd ring high temperature superconducting bulk body 4 Linear and uniform magnetic field space 11 Superconducting magnet 21 High temperature superconducting bulk body impregnated with resin 31 High-temperature superconducting bulk material impregnated with three laminated resins
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010159225A JP5583501B2 (en) | 2010-07-14 | 2010-07-14 | Simple superconducting magnet and manufacturing method thereof |
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