JPH05190326A - Permanent current coil - Google Patents
Permanent current coilInfo
- Publication number
- JPH05190326A JPH05190326A JP628992A JP628992A JPH05190326A JP H05190326 A JPH05190326 A JP H05190326A JP 628992 A JP628992 A JP 628992A JP 628992 A JP628992 A JP 628992A JP H05190326 A JPH05190326 A JP H05190326A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- current
- permanent current
- magnetic field
- superconducting
- 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.)
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Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、酸化物超電導材料を
用いた永久電流コイルに関し、特に超電導マグネットと
して有用なものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent current coil using an oxide superconducting material, and more particularly to a coil useful as a superconducting magnet.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】一般
的に超電導マグネットにおいて永久電流コイルを励磁す
るためには、コイルを形成する超電導体の接合部または
その付近を一旦超電導状態から常電導状態ににする必要
がある。2. Description of the Related Art Generally, in order to excite a permanent current coil in a superconducting magnet, a superconducting joint forming a coil or its vicinity is temporarily changed from a superconducting state to a normal conducting state. Need to
【０００３】このため、従来の合金系または化合物系超
電導線材を用いた超電導マグネットでは、超電導体の接
合部またはその付近にヒータまたは磁気スイッチを用い
た永久電流スイッチを取付け、その部分について加熱す
るかまたは磁場をかけるかして通電前からその部分を一
旦常電導状態にしておき、永久電流コイルに電流を流し
ていた。Therefore, in a conventional superconducting magnet using an alloy-based or compound-based superconducting wire, a heater or a permanent current switch using a magnetic switch is attached at or near the junction of the superconductors to heat the portion. Alternatively, by applying a magnetic field, the part was once brought into the normal conducting state before energization, and a current was passed through the permanent current coil.
【０００４】このような永久電流スイッチは、超電導線
材の急激な超電導−常電導転移を防ぐとともに、磁場の
昇降および永久電流モードのオン・オフに使用される。Such a persistent current switch is used for preventing abrupt superconducting-normal conducting transition of a superconducting wire and for raising and lowering a magnetic field and turning on and off a persistent current mode.
【０００５】しかしながら、従来の超電導マグネットに
おいて、必要とされる永久電流スイッチは、使用される
ヒータまたは磁気スイッチのためマグネットの構造を複
雑にしていたとともに、スイッチ部がクエンチするなど
の電磁気的不安定性等の問題を有していた。また、スイ
ッチ部を常電導状態にするための加熱により、液体ヘリ
ウムを大巾に消費するという欠点も存在した。However, in the conventional superconducting magnet, the required permanent current switch complicates the structure of the magnet due to the heater or magnetic switch used, and also causes electromagnetic instability such as quenching of the switch section. Had problems such as. In addition, there is a drawback that liquid helium is consumed extensively by heating to bring the switch part to the normal conducting state.
【０００６】それゆえに、この発明の目的は、より簡単
な構造で、しかも運転が安定し、さらに低コストの超電
導マグネットを実現することができる永久電流コイルを
提供することにある。Therefore, an object of the present invention is to provide a permanent current coil which has a simpler structure, is stable in operation, and can realize a low-cost superconducting magnet.
【０００７】また、この発明のさらなる目的は、液体ヘ
リウムよりも沸点が高い寒材を用いても使用が可能であ
る永久電流コイルを作製することができる技術を提供す
ることにある。A further object of the present invention is to provide a technique capable of producing a permanent current coil which can be used even with a cold material having a boiling point higher than that of liquid helium.
【０００８】[0008]
【課題を解決するための手段】酸化物超電導体は、従来
の超電導体よりも超電導転移温度が高く、しかもより大
きな比熱を有する。このような酸化物超電導体について
その常電導転移現象を詳細に検討した結果、磁場や通電
による超電導−常電導転移は、同温度で比較すると他の
合金系超電導体などよりも実質的に緩やかであることが
判った。Oxide superconductors have a higher superconducting transition temperature and a higher specific heat than conventional superconductors. As a result of a detailed examination of the normal transition phenomenon of such an oxide superconductor, the superconducting-normal conduction transition due to a magnetic field or energization is substantially slower than that of other alloy-based superconductors at the same temperature. I knew it was.
【０００９】本発明者らは、このような性質に着目し、
酸化物超電導線材を用いてより簡単な構造の永久電流コ
イルを実現させるに至った。The present inventors have paid attention to such a property,
Using an oxide superconducting wire, we have realized a permanent current coil with a simpler structure.
【００１０】すなわち、この発明に従う永久電流コイル
は、酸化物超電導線材で形成されるコイル部と、コイル
部を形成する酸化物超電導線材が接合される接合部と、
コイル部および接合部に同時に電流を流すことができる
よう、酸化物超電導線材上においてコイル部と接合部の
間に設けられる１対の端子部とを備え、１対の端子部を
介して流す電流の制御により、コイル部における永久電
流モードおよび発生磁場が制御されることを特徴とす
る。That is, the permanent current coil according to the present invention comprises a coil portion formed of an oxide superconducting wire and a joint portion to which the oxide superconducting wire forming the coil portion is joined.
In order to allow a current to flow through the coil portion and the joint portion at the same time, a pair of terminal portions provided between the coil portion and the joint portion on the oxide superconducting wire is provided, and a current flowing through the pair of terminal portions. Is controlled to control the permanent current mode and the generated magnetic field in the coil section.
【００１１】この発明に従う酸化物超電導線材は、たと
えば、金属により被覆された酸化物超電導体よりなる線
材等を含むが、酸化物超電導体を導体として用いた線材
であれば、いかなるものにも限定されない。酸化物超電
導体としては、たとえば、イットリウム系、ビスマス系
およびタリウム系のものを好ましく用いることができ
る。また、臨界電流密度、低毒性および希土類元素を必
要としないことでビスマス系がより好ましく、さらにビ
スマス系においては、特に高温相がより好ましい。The oxide superconducting wire according to the present invention includes, for example, a wire made of an oxide superconductor coated with a metal, but is not limited to any wire as long as the oxide superconductor is used as a conductor. Not done. As the oxide superconductor, for example, yttrium-based, bismuth-based, and thallium-based ones can be preferably used. In addition, a bismuth-based material is more preferable because a critical current density, low toxicity and a rare earth element are not required, and in the bismuth-based material, a high temperature phase is particularly preferable.
【００１２】この発明に従う接合部は、酸化物超電導線
材の超電導体同士が直接接合されているか、または酸化
物超電導体のみを介して線材の超電導体同士が接続され
ているものであれば、特に限定されるものではない。The joining portion according to the present invention is particularly preferable as long as the superconductors of the oxide superconducting wires are directly joined to each other or the superconductors of the wires are connected only through the oxide superconductors. It is not limited.
【００１３】上記接合部として、たとえば金属被覆され
た酸化物超電導線材を用いる場合、接合されるべき線材
の金属被覆をはがし、かつ露出した超電導体同士を重ね
合わせて接合したもの、並びに金属被覆がはがされ露出
した超電導体間に別の酸化物超電導体を介在させて線材
の超電導体同士を接続したもの等を挙げることができ
る。本発明者らの検討では、後者の方が大きな超電導電
流が得られ、かつ安定した接続が得られるのでより好ま
しい。このような接合には、たとえば、材料が重ね合わ
せられた部分に圧力を加えた後、加熱処理する方法等を
用いることができる。When, for example, a metal-coated oxide superconducting wire is used as the above-mentioned joining portion, the metal coating of the wire to be joined is peeled off, and the exposed superconductors are superposed and joined together, as well as the metal coating. The superconductors of the wire may be connected to each other by interposing another oxide superconductor between the stripped and exposed superconductors. According to the study by the present inventors, the latter is more preferable because a larger superconducting current can be obtained and a stable connection can be obtained. For such joining, for example, a method of applying heat to the portions where the materials are superposed and then performing heat treatment can be used.
【００１４】[0014]
【作用】図１は、この発明に従う永久電流コイルを駆動
させるための簡単な回路を示している。図において、点
線で囲まれる永久電流コイル１０は、酸化物超電導線材
で形成されたコイル部１１、およびコイル部１１を形成
する線材が接合された接合部１２を有する。また、コイ
ル部１１と接合部１２の間には、それぞれ端子部１３ａ
および１３ｂが設けられている。そして、端子部１３ａ
と１３ｂの間に可変抵抗１４を介して電源１５より電圧
が印加されるようになっている。FIG. 1 shows a simple circuit for driving a persistent current coil according to the present invention. In the figure, a permanent current coil 10 surrounded by a dotted line has a coil portion 11 formed of an oxide superconducting wire and a joining portion 12 to which the wires forming the coil portion 11 are joined. Further, between the coil portion 11 and the joint portion 12, the terminal portion 13a is provided.
And 13b are provided. And the terminal portion 13a
And 13b, a voltage is applied from the power source 15 via the variable resistor 14.
【００１５】図を参照しながら、本発明に従う永久電流
コイルの動作機構について以下に説明する。まず、超電
導状態にされた永久電流コイル１０に、端子部１３ａ、
１３ｂを介して電流を流し始める。このとき、可変抵抗
を用いて電流値を０から徐々に上げていくと、始めはコ
イル部１１のインダクタンスのため、電流は超電導状態
の接合部１２の方に流れ続け、コイル部１１に磁場は発
生しない。しかし、電流値がある値を越えると、接合部
１２およびその付近の超電導状態が破れ、常電導状態に
転移する。その結果、コイル部１１に電流が流れ始め、
コイル部１１の励磁が始まる。ある程度磁場が発生した
状態で電源をオフにすると、永久電流によりコイル内に
強い磁界が保たれる。このように、本発明では、接合部
の酸化物超電導体自身に流す電流値を変化させること
で、超電導−常電導転移を行ない、永久電流モードを制
御することができる。The operation mechanism of the persistent current coil according to the present invention will be described below with reference to the drawings. First, in the persistent current coil 10 in the superconducting state, the terminal portion 13a,
Begin to pass current through 13b. At this time, when the current value is gradually increased from 0 using the variable resistance, the current continues to flow toward the superconducting junction 12 due to the inductance of the coil 11, and the magnetic field is generated in the coil 11. Does not occur. However, when the current value exceeds a certain value, the superconducting state of the junction 12 and its vicinity is broken, and the state changes to the normal conducting state. As a result, a current starts to flow in the coil portion 11,
Excitation of the coil portion 11 starts. When the power supply is turned off with a magnetic field generated to some extent, a strong magnetic field is maintained in the coil due to the permanent current. As described above, in the present invention, by changing the value of the current flowing through the oxide superconductor itself at the junction, the superconducting-normal conducting transition can be performed and the persistent current mode can be controlled.
【００１６】一方、コイル部で磁界を発生させた状態に
おいて、磁場を発生させたときと反対の電流を端子部か
ら通電していくと、永久電流モードをオフにすることが
できるとともに、磁場を変化させることができる。On the other hand, in the state where the magnetic field is generated in the coil portion, if a current opposite to that when the magnetic field is generated is supplied from the terminal portion, the permanent current mode can be turned off and the magnetic field can be reduced. Can be changed.
【００１７】[0017]
実施例１ Ｂｉ：Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８０：０．４１：
２．０１：２．１８：３．０２の組成を持つように、酸
化物または炭酸塩を混合し、熱処理により、主に２２１
２相と非超電導相からなる粉末を準備した。Example 1 Bi: Pb: Sr: Ca: Cu = 1.80: 0.41:
The oxide or carbonate is mixed so as to have a composition of 2.01: 2.18: 3.02, and mainly 221 is obtained by heat treatment.
A powder consisting of two phases and a non-superconducting phase was prepared.
【００１８】この粉末に対して、大気中８００℃、２時
間の脱ガス処理を施した。次に、この粉末を外径１２ｍ
ｍ、内径８ｍｍの銀パイプで被覆し、直径１．８ｍｍま
で伸線加工した後、０．２９ｍｍの厚みまで圧延加工し
た。このようにして得られた幅約６ｍｍのテープ状の線
材を８４５℃、５０時間熱処理して焼結を行なった。得
られたビスマス系酸化物超電導線材の超電導転移温度は
１１０Ｋであった。この線材を冷間圧延により、厚み
０．２６ｍｍ、幅４ｍｍに一パスで圧延した。The powder was degassed at 800 ° C. for 2 hours in the air. Next, this powder is 12m in outer diameter
It was covered with a silver pipe having an inner diameter of 8 mm and an inner diameter of 8 mm, drawn to a diameter of 1.8 mm, and then rolled to a thickness of 0.29 mm. The tape-shaped wire rod having a width of about 6 mm thus obtained was heat-treated at 845 ° C. for 50 hours to be sintered. The superconducting transition temperature of the obtained bismuth oxide superconducting wire was 110K. This wire rod was cold-rolled to a thickness of 0.26 mm and a width of 4 mm in one pass.
【００１９】上記銀被覆超電導テープ線材を２枚重ね
て、２０ターン、内径３０ｍｍ、外径５０ｍｍのダブル
パンケーキコイルを作成した。次に、コイルを形成した
線材の端末部分５ｍｍについて、１本づつ個別に銀被覆
をそれぞれ半分ぐらいずつはがして超電導体を露出させ
た後、超電導体同士を重ね合わせて３０トンの押圧処理
により接合させた。コイル形成後、接合させた線材を８
４０℃で５０時間熱処理した後、コイル部と接合部との
間に１対の端子を設けた。Two pieces of the above silver-coated superconducting tape wire were stacked to form a double pancake coil having 20 turns, an inner diameter of 30 mm and an outer diameter of 50 mm. Next, about 5 mm of the terminal portion of the wire material on which the coil was formed, about half each of the silver coatings were individually peeled off to expose the superconductors, and then the superconductors were overlapped with each other and joined by a pressing treatment of 30 tons. Let After forming the coil,
After heat treatment at 40 ° C. for 50 hours, a pair of terminals was provided between the coil portion and the joint portion.
【００２０】このようにして得られた永久電流コイルを
図２に示す。永久電流コイル２０は、ビスマス系酸化物
超電導線材２４で形成されたコイル部２１、および線材
の接合部２２を有し、コイル部２１と接合部２２の間に
は、１対の端子部２３ａおよび２３ｂが設けられてい
る。The permanent current coil thus obtained is shown in FIG. The persistent current coil 20 has a coil portion 21 formed of a bismuth-based oxide superconducting wire 24, and a joint portion 22 of the wire material, and a pair of terminal portions 23 a and a joint portion 22 are provided between the coil portion 21 and the joint portion 22. 23b is provided.
【００２１】図２に示す永久電流コイルについて、以下
のとおり超電導マグネットとしての特性を調べた。ま
た、コイルの発生磁場は、コイル中心にホール素子を埋
め込んで測定した。With respect to the permanent current coil shown in FIG. 2, the characteristics as a superconducting magnet were examined as follows. The magnetic field generated by the coil was measured by embedding a Hall element in the center of the coil.
【００２２】まず、永久電流スイッチを使用せずにコイ
ルを永久電流モードにする実験を行なった。実験にあた
り、永久電流コイルを液体窒素に漬け、端子部２３ａ、
２３ｂを介して電流を流した。電流値は図３の一点鎖線
に示すように０から直線的に増加させていった。図に示
すように、通電電流が６Ａになるまでは電流は接合部側
に流れ続け、コイル部に磁場は発生しなかった。電流が
６Ａを越えて接合部側の超電導状態が破れると、コイル
部にも電流が流れ始め、図３の実線に示すようにコイル
部の励磁が始まった。ある程度磁場が発生した状態で電
源をオフにすると、永久電流により１．６ガウスの磁場
が保持された。この過程が永久電流モードのオンに相当
する。 実施例２ 実施例１と同一の永久電流コイルを用い、永久電流モー
ドからコイル部の磁場を変化させる実験を行なった。コ
イルを液体ヘリウムに漬けて行った実験結果を図４に示
す。図４に示すように、時間０の点において、永久電流
コイルは永久電流モードであり、−１１ガウスの磁場を
保持している。次に、磁場を発生させたときと反対の方
向に電流を通電し始めると、図の実線に示すように磁場
が変化し始める。この過程が永久電流スイッチを用いず
に永久電流モードをオフにした状態に相当する。１５Ａ
まで直線的に電流値を増加させていった結果、図に示す
ように逆方向に磁場が発生するようになった。次に電源
をオフにすると、今度は逆向きの永久電流によって約１
６ガウスの磁場が保持された。この過程により、永久電
流コイルの発生磁場を変化させることができた。First, an experiment was conducted in which the coil was placed in the persistent current mode without using the persistent current switch. In the experiment, the permanent current coil was immersed in liquid nitrogen, and the terminal portion 23a,
An electric current was passed through 23b. The current value was linearly increased from 0 as shown by the alternate long and short dash line in FIG. As shown in the figure, the current continued to flow to the joint side until the energizing current reached 6 A, and no magnetic field was generated in the coil portion. When the current exceeded 6 A and the superconducting state on the junction side was broken, the current also started to flow in the coil section, and excitation of the coil section started as shown by the solid line in FIG. When the power supply was turned off with a magnetic field generated to some extent, a 1.6 Gauss magnetic field was retained by the permanent current. This process corresponds to turning on the persistent current mode. Example 2 Using the same permanent current coil as in Example 1, an experiment was conducted to change the magnetic field of the coil part from the permanent current mode. FIG. 4 shows the result of an experiment conducted by immersing the coil in liquid helium. As shown in FIG. 4, at the point of time 0, the permanent current coil is in the permanent current mode and holds the magnetic field of −11 gauss. Next, when a current is started to flow in the direction opposite to that when the magnetic field is generated, the magnetic field starts to change as shown by the solid line in the figure. This process corresponds to a state in which the persistent current mode is turned off without using the persistent current switch. 15A
As a result of linearly increasing the current value up to, a magnetic field was generated in the opposite direction as shown in the figure. Next, when the power is turned off, the reverse permanent current causes about 1
A magnetic field of 6 Gauss was maintained. By this process, the magnetic field generated by the permanent current coil could be changed.
【００２３】なお、上記実施例において、接合部はテー
プ状線材の銀被覆をはがして接合させたものとしたが、
これに限定されることなく、超電導体同士が接合されて
いる構造であれば、種々の形態のものを用いることがで
きる。In the above embodiment, the joining portion is formed by peeling off the silver coating of the tape-shaped wire and joining it.
Without being limited to this, as long as the superconductors are joined to each other, various structures can be used.
【００２４】[0024]
【発明の効果】以上説明したように、この発明に従え
ば、端子部を介して流す電流の制御によりコイル部にお
ける永久電流モードおよび発生磁場を制御する機構を採
用したため、従来の永久電流スイッチを用いずに発生磁
場および永久電流モードのオン・オフが制御できる永久
電流コイルを提供することができる。As described above, according to the present invention, since the mechanism for controlling the permanent current mode and the generated magnetic field in the coil portion is adopted by controlling the current flowing through the terminal portion, the conventional permanent current switch is used. It is possible to provide a permanent current coil in which the generated magnetic field and the on / off of the permanent current mode can be controlled without using it.
【００２５】このように、従来、ヒータまたは磁気スイ
ッチ等を必要とした永久電流スイッチが不要なため、構
造上単純な永久電流コイルを製造することができる。ま
た、この発明の永久電流コイルでは、磁場の昇降時に永
久電流スイッチのオン・オフの操作を行なう必要がな
く、より短時間での永久電流モードのオン・オフが可能
となる。これは、実際に永久電流コイルを超電導マグネ
ットとして製造した場合に、構造上、および取扱い上、
いずれをとっても非常に有益である。As described above, since a permanent current switch, which has conventionally required a heater or a magnetic switch, is not required, it is possible to manufacture a permanent current coil having a simple structure. Further, in the permanent current coil of the present invention, it is not necessary to turn on / off the permanent current switch when moving up and down the magnetic field, and it is possible to turn on / off the permanent current mode in a shorter time. This is because of the structure and handling when the permanent current coil is actually manufactured as a superconducting magnet.
Both are very useful.
【００２６】また、臨界温度が窒素温度を超えるビスマ
ス系などの酸化物超電導体を用いた線材でこの発明のコ
イルを作製すれば、寒材として液体窒素を使用するだけ
で永久電流コイルの使用が可能となる。Further, if the coil of the present invention is made of a wire using an oxide superconductor such as a bismuth oxide whose critical temperature exceeds the nitrogen temperature, the use of a permanent current coil is possible only by using liquid nitrogen as a cold material. It will be possible.
【００２７】なお、以上述べてきたように本発明は特に
超電導マグネットとして有用なものであるが、その他、
電力貯蔵装置および超電導電池等にも応用することがで
きる。As described above, the present invention is particularly useful as a superconducting magnet.
It can also be applied to power storage devices and superconducting batteries.
【図１】この発明に従う永久電流コイルの作用機構を示
すための回路図である。FIG. 1 is a circuit diagram showing an operating mechanism of a persistent current coil according to the present invention.
【図２】この発明に従う永久電流コイルの１具体例を示
す概略斜視図である。FIG. 2 is a schematic perspective view showing a specific example of a permanent current coil according to the present invention.
【図３】この発明に従う永久電流コイルの１具体例にお
いて、コイルを永久電流モードにする実験結果を示す図
である。FIG. 3 is a diagram showing an experimental result of putting a coil into a persistent current mode in one specific example of the persistent current coil according to the present invention.
【図４】この発明に従う永久電流コイルの１具体例にお
いて、コイルの磁場を変化させる実験結果を示す図であ
る。FIG. 4 is a diagram showing an experimental result of changing the magnetic field of the coil in one specific example of the persistent current coil according to the present invention.
１０、２０ 永久電流コイル １１、２１ コイル部 １２、２２ 接合部 １３ａ、１３ｂ、２３ａ、２３ｂ 端子部 ２４ 酸化物超電導線材 10, 20 Permanent current coil 11, 21 Coil part 12, 22 Joint part 13a, 13b, 23a, 23b Terminal part 24 Oxide superconducting wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 向井 英仁 大阪市此花区島屋一丁目１番３号 住友電 気工業株式会社大阪製作所内 (72)発明者 加藤 武志 大阪市此花区島屋一丁目１番３号 住友電 気工業株式会社大阪製作所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hidehito Mukai, 1-3, Shimaya, Konohana-ku, Osaka City, Sumitomo Electric Industries, Ltd. (72) Takeshi Kato, 1-1, Shimaya, Konohana-ku, Osaka No. 3 Sumitomo Electric Industries, Ltd. Osaka Works
Claims (1)
と、 前記コイル部を形成する酸化物超電導線材が接合される
接合部と、 前記コイル部および前記接合部に同時に電流を流すこと
ができるよう、前記酸化物超電導線材上において前記コ
イル部と前記接合部の間に設けられる１対の端子部とを
備え、 前記１対の端子部を介して流す電流の制御により、前記
コイル部における電流モードおよび発生磁場が制御され
ることを特徴とする、永久電流コイル。1. A coil part formed of an oxide superconducting wire, a joint part to which the oxide superconducting wire forming the coil part is joined, and a current can be simultaneously applied to the coil part and the joint part. As described above, the oxide superconducting wire is provided with a pair of terminal portions provided between the coil portion and the joint portion, and a current in the coil portion is controlled by controlling a current flowing through the pair of terminal portions. A persistent current coil, characterized in that the mode and the magnetic field generated are controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP628992A JP2871260B2 (en) | 1992-01-17 | 1992-01-17 | Permanent current coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP628992A JP2871260B2 (en) | 1992-01-17 | 1992-01-17 | Permanent current coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05190326A true JPH05190326A (en) | 1993-07-30 |
| JP2871260B2 JP2871260B2 (en) | 1999-03-17 |
Family
ID=11634233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP628992A Expired - Fee Related JP2871260B2 (en) | 1992-01-17 | 1992-01-17 | Permanent current coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2871260B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007004787A3 (en) * | 2005-07-06 | 2007-03-22 | Univ Korea Polytechnic | Superconductive magnet for persistent current and method for manufacturing the same |
| WO2018211797A1 (en) * | 2017-05-15 | 2018-11-22 | 国立研究開発法人理化学研究所 | Superconducting magnet |
-
1992
- 1992-01-17 JP JP628992A patent/JP2871260B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007004787A3 (en) * | 2005-07-06 | 2007-03-22 | Univ Korea Polytechnic | Superconductive magnet for persistent current and method for manufacturing the same |
| US20080207458A1 (en) * | 2005-07-06 | 2008-08-28 | Gye-Won Hong | Superconductive Magnet for Persistent Current and Method for Manufacturing the Same |
| JP2009500843A (en) * | 2005-07-06 | 2009-01-08 | コリアポリテクニック大学 | Superconducting magnet for permanent current and manufacturing method thereof |
| JP4677032B2 (en) * | 2005-07-06 | 2011-04-27 | コリアポリテクニック大学 | Superconducting magnet for permanent current and manufacturing method thereof |
| US8178473B2 (en) * | 2005-07-06 | 2012-05-15 | Gye-Won Hong | Superconductive magnet for persistent current and method for manufacturing the same |
| WO2018211797A1 (en) * | 2017-05-15 | 2018-11-22 | 国立研究開発法人理化学研究所 | Superconducting magnet |
| CN110637347A (en) * | 2017-05-15 | 2019-12-31 | 国立研究开发法人理化学研究所 | Superconducting magnet |
| KR20200004813A (en) * | 2017-05-15 | 2020-01-14 | 고쿠리쓰 겐큐 가이하쓰 호징 리가가쿠 겐큐소 | Superconducting magnet |
| JPWO2018211797A1 (en) * | 2017-05-15 | 2020-03-19 | 国立研究開発法人理化学研究所 | Superconducting magnet |
| CN110637347B (en) * | 2017-05-15 | 2021-05-25 | 国立研究开发法人理化学研究所 | Superconducting magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2871260B2 (en) | 1999-03-17 |
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