JPH0786643A - Conduction cooling superconducting magnet device - Google Patents
Conduction cooling superconducting magnet deviceInfo
- Publication number
- JPH0786643A JPH0786643A JP5225702A JP22570293A JPH0786643A JP H0786643 A JPH0786643 A JP H0786643A JP 5225702 A JP5225702 A JP 5225702A JP 22570293 A JP22570293 A JP 22570293A JP H0786643 A JPH0786643 A JP H0786643A
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- Prior art keywords
- superconducting
- magnetic shield
- shield member
- superconducting coil
- cooling
- Prior art date
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は,伝導冷却型超電導電磁
石装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduction cooling type superconducting electromagnet device.
【0002】[0002]
【従来の技術】図4は従来例に係る伝導冷却型超電導電
磁石装置の一部縦断面図である。図4で示すように,伝
導冷却型超電導電磁石装置50は,基台2と,クライオ
スタットと呼ばれる真空容器3と,熱シールド板4と,
超電導コイル5´と,正負極一対の高温超電導電流リー
ド6と,蓄冷式冷凍機7と,外部電源8とを備えてい
る。2. Description of the Related Art FIG. 4 is a partial longitudinal sectional view of a conduction cooling type superconducting electromagnet apparatus according to a conventional example. As shown in FIG. 4, the conduction cooling type superconducting electromagnet apparatus 50 includes a base 2, a vacuum container 3 called a cryostat, a heat shield plate 4,
It is provided with a superconducting coil 5 ', a pair of positive and negative electrode high temperature superconducting current leads 6, a regenerator 7, and an external power source 8.
【0003】高温超電導電流リード6は,高温側端部を
蓄冷式冷凍機7の第1段冷却ステージ7Aに低温側端部
を第2段冷却ステージ7Bにそれぞれ取り付けてあり,
真空容器3内の常電導電流リードワイヤ13及び真空容
器3の底部に設けられた電流リード端子12を介して外
部電源8に接続されている。この超電導コイル5は冷却
促進材としての外周冷却用銅ブロック11に覆われてい
る。The high temperature superconducting current lead 6 has its high temperature side end attached to the first stage cooling stage 7A of the regenerator 7 and its low temperature side end attached to the second stage cooling stage 7B, respectively.
It is connected to an external power source 8 via a normal conducting current lead wire 13 in the vacuum vessel 3 and a current lead terminal 12 provided at the bottom of the vacuum vessel 3. The superconducting coil 5 is covered with a copper block 11 for cooling the outer periphery as a cooling promoting material.
【0004】蓄冷式冷凍機7は,その第1段冷却ステー
ジ7Aは液体窒素温度77K付近まで冷却可能であり,
第2段冷却ステージ7Bは極低温4〜10Kまで冷却可
能に構成されている。In the regenerator 7, the first cooling stage 7A can cool the liquid nitrogen temperature to around 77K,
The second cooling stage 7B is configured to be able to cool to an extremely low temperature of 4 to 10K.
【0005】したがって,常電導電流リード13が真空
容器3の常温(300K)部分から蓄冷式冷凍機7の第
1段冷却ステージ7Aの温度(70K)付近までの範囲
で給電を行い,高温超電導電流リード6が第1段冷却ス
テージ7Aの部分から第2段冷却ステージ7Bの温度範
囲での給電を行う。Therefore, the normal-current conductive current lead 13 supplies power in the range from the room temperature (300K) portion of the vacuum container 3 to the temperature (70K) of the first cooling stage 7A of the regenerator 7, and the high-temperature superconducting current flows. The lead 6 supplies power in the temperature range of the first cooling stage 7A to the second cooling stage 7B.
【0006】こうした構成の伝導冷却型超電導電磁石装
置50において,外部電源8からの正極電流は,最初に
電流リード端子12を経て,常電導電流リードワイヤ1
3に導かれ,ついで順次,高温側電極14,高温度超電
導電流リード6,低温側電極20に導かれ,超電導コイ
ル5が励磁される。尚,負電流は上述と逆コースで外部
電源8まで戻る。In the conduction cooling type superconducting electromagnet apparatus 50 having such a structure, the positive electrode current from the external power source 8 first passes through the current lead terminal 12 and then the normal conducting current lead wire 1.
3 to the high temperature side electrode 14, the high temperature superconducting current lead 6 and the low temperature side electrode 20, and the superconducting coil 5 is excited. Incidentally, the negative current returns to the external power source 8 in the course opposite to the above.
【0007】[0007]
【発明が解決しようとする課題】しかしながら,超電導
コイル5に給電する高温度超電導電流リード6を酸化物
高温超電導体により構成しているが,この酸化物超電導
体の臨界電流は,外部磁場により大幅に低下することが
知られている。However, the high temperature superconducting current lead 6 feeding the superconducting coil 5 is composed of an oxide high temperature superconductor, and the critical current of this oxide superconductor is greatly affected by an external magnetic field. It is known to decline.
【0008】従って,各種超電導コイルの電流リードと
して,酸化物高温超電導体を用いる場合には,超電導磁
石からの漏れ磁場に対して,何等かの磁気シールドを施
すことにより,臨界電流の低下を防ぐ必要がある。Therefore, when an oxide high-temperature superconductor is used as a current lead of various superconducting coils, a certain magnetic shield is applied to the leakage magnetic field from the superconducting magnet to prevent a decrease in the critical current. There is a need.
【0009】そこで,本発明の第1の技術的課題は,酸
化物超電導電流リードにおける超電導コイルからの漏れ
磁場を減少させ,酸化物高温超電導電流リードの臨界電
流の低下を防止することができる伝導冷却型超電導電磁
石装置を提供することにある。Therefore, the first technical problem of the present invention is to reduce the leakage magnetic field from the superconducting coil in the oxide superconducting current lead, and to prevent the decrease of the critical current of the oxide high temperature superconducting current lead. It is to provide a cooling type superconducting electromagnet device.
【0010】さらに,本発明の第2の技術的課題は,伝
導冷却のための冷却ステージと超電導コイルとの熱的接
触が充分に確保できない場合においても,伝導による超
電導コイルの冷却が可能である伝導冷却型超電導電磁石
装置を提供することにある。Further, the second technical problem of the present invention is that the superconducting coil can be cooled by conduction even when sufficient thermal contact between the cooling stage for conduction cooling and the superconducting coil cannot be ensured. It is to provide a conduction cooling type superconducting electromagnet device.
【0011】[0011]
【課題を解決するための手段】本発明によれば,超電導
コイルを蓄冷式冷凍機の冷却ステージ上に固定した伝導
冷却型超電導電磁石装置において,前記超電導コイルの
周囲を透磁率の大きな鉄系の金属製の磁気シールド部材
によって取り囲んだことを特徴とする伝導冷却型超電導
電磁石装置が得られる。According to the present invention, in a conduction cooling type superconducting electromagnet apparatus in which a superconducting coil is fixed on a cooling stage of a regenerator, an iron system having a large magnetic permeability is provided around the superconducting coil. A conduction cooling type superconducting electromagnet device is obtained which is characterized by being surrounded by a metal magnetic shield member.
【0012】本発明によれば,前記伝導冷却型超電導電
磁石装置において,前記磁気シールド部材は,前記冷却
ステージと前記超電導コイルの間に少なくとも設けら
れ,前記超電導コイルは,周囲に熱伝導率の大きな冷却
促進部材が設けられていることを特徴とする伝導冷却型
超電導電磁石装置が得られる。According to the present invention, in the conduction cooling type superconducting electromagnet apparatus, the magnetic shield member is provided at least between the cooling stage and the superconducting coil, and the superconducting coil has a large thermal conductivity in the surroundings. A conduction cooling type superconducting electromagnet device is obtained which is provided with a cooling promoting member.
【0013】[0013]
【作用】本発明においては,超電導コイルの周囲を鉄系
の金属製の磁気シールド部材によって取り囲むことによ
って,酸化物超電導電流リード部における超電導コイル
からの漏れ磁場を減少させ,酸化物高温超電導電流リー
ドの臨界電流の低下を防止する。In the present invention, by surrounding the superconducting coil with a magnetic shield member made of an iron-based metal, the leakage magnetic field from the superconducting coil in the oxide superconducting current lead portion can be reduced, and the oxide high temperature superconducting current lead can be reduced. To prevent a decrease in the critical current.
【0014】[0014]
【実施例】以下,本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【0015】図1は本発明の実施例に係る伝導冷却型超
電導電磁石装置の一部縦断面図である。図1で示すよう
に,伝導冷却型超電導電磁石装置1は,真空容器3と,
第1段冷却ステージ7A及び第2段冷却ステージ7Bを
備えた蓄冷式冷凍機7と,第2段冷却ステージ7Bに載
置された超電導コイル5と,この超電導コイル5に電極
20を介して接続され,第1段冷却ステージ7Aを貫通
して設けられた一対の低温側電極14に接続される高温
超電導電流リード6と,第1段冷却ステージ7Aを底部
として超電導コイル5を覆う熱シールド板4と,高温側
電極14と真空容器3の底部に設けられた電流リード端
子12との間を接続する常電導電流リード13とを備え
ている。この電流リード端子12は,図示しない外部電
源に接続されている。FIG. 1 is a partial longitudinal sectional view of a conduction cooling type superconducting electromagnet apparatus according to an embodiment of the present invention. As shown in FIG. 1, the conduction cooling type superconducting electromagnet apparatus 1 includes a vacuum container 3,
The regenerative refrigerator 7 including the first cooling stage 7A and the second cooling stage 7B, the superconducting coil 5 placed on the second cooling stage 7B, and the superconducting coil 5 are connected to the superconducting coil 5 via electrodes 20. And a high temperature superconducting current lead 6 connected to a pair of low temperature side electrodes 14 provided penetrating the first cooling stage 7A, and a heat shield plate 4 covering the superconducting coil 5 with the first cooling stage 7A as the bottom. And a high-temperature side electrode 14 and a current conducting terminal 13 connected between the current lead terminal 12 provided at the bottom of the vacuum chamber 3. The current lead terminal 12 is connected to an external power source (not shown).
【0016】蓄冷式冷凍機7は,液体ヘリウム温度の冷
却を行う第2段冷却ステージ7B及び液体窒素温度77
Kまでの冷却を行う第1段冷却ステージ7Aと,その間
に設けられた第2冷却部Dと,真空容器3の底部に当接
するための固定板7Cと,第1段冷却ステージ7Aと固
定板7Cとの間に設けられた第1冷却部Eと,固定板7
Cから外部の導入部7Fとを備えて構成されている。The regenerator 7 includes a second cooling stage 7B for cooling the liquid helium temperature and a liquid nitrogen temperature 77.
First stage cooling stage 7A for cooling up to K, second cooling section D provided therebetween, fixing plate 7C for contacting the bottom of vacuum container 3, first stage cooling stage 7A and fixing plate 7C, the 1st cooling part E provided between 7C, and the fixed plate 7
It is configured by including an external introduction portion 7F from C.
【0017】超電導コイル5は,コイル巻き枠9と,こ
のコイル巻き枠9に巻回された超電導線材からなる巻線
部10と,それらの外周を締め付けて固定された冷却促
進部材として外周冷却用銅ブロック11とを備え,さら
に,その両端及び外周に磁気シールド部材19が取り付
けてある。コイル巻き枠9は,巻き芯9Aとこの巻き芯
9Aの上下両端部に一体形成した端部フランジ9B,9
Cとから構成されている。The superconducting coil 5 is a coil winding frame 9, a winding portion 10 made of a superconducting wire wound around the coil winding frame 9, and a cooling accelerating member fixed by tightening the outer circumferences thereof for cooling the outer circumference. A copper block 11 is provided, and magnetic shield members 19 are attached to both ends and the outer periphery of the copper block 11. The coil winding frame 9 includes a winding core 9A and end flanges 9B and 9B integrally formed at upper and lower ends of the winding core 9A.
It is composed of C and.
【0018】磁気シールド部材19は,超電導コイル5
の外周冷却用銅ブロック11のさらに外側に配置してい
る円筒形状の側部磁気シールド部材19Aと,コイル巻
き枠端部フランジ9B,9Cの外側にそれぞれ配置され
た円盤形状の上部磁気シールド部材19B及び下部磁気
シールド部材19Cとから構成されている。The magnetic shield member 19 is the superconducting coil 5
Of the cylindrical side magnetic shield member 19A arranged further outside the outer peripheral cooling copper block 11 and the disk-shaped upper magnetic shield member 19B arranged outside the coil winding frame end flanges 9B and 9C. And a lower magnetic shield member 19C.
【0019】磁気シールド部材19には,高透磁率の材
料,例えば,純鉄,パーマロイなどが用いられる。The magnetic shield member 19 is made of a material having a high magnetic permeability, such as pure iron or permalloy.
【0020】高温超電導電流リード6は,高温絶縁体1
7を介して固定された低温度側電極20と高温側電極1
4間に固定されている。高温側電極14の下端には,熱
アンカー銅線18が設けられており,一端部は高温絶縁
体17に接合されている。The high temperature superconducting current lead 6 is composed of the high temperature insulator 1
Low temperature side electrode 20 and high temperature side electrode 1 fixed via 7
It is fixed between four. A thermal anchor copper wire 18 is provided at the lower end of the high temperature side electrode 14, and one end thereof is joined to a high temperature insulator 17.
【0021】このように,磁気シールド部材19で超電
導コイルの周囲を取り囲むことによって,高温超電導電
流リード6における超電導コイル5からの漏れ磁場を減
少させ,酸高温超電導電流リード6の臨界電流の低下を
防止することができる。By thus surrounding the superconducting coil with the magnetic shield member 19, the leakage magnetic field from the superconducting coil 5 in the high temperature superconducting current lead 6 is reduced, and the critical current of the acid high temperature superconducting current lead 6 is reduced. Can be prevented.
【0022】熱シールド板4は,蓄冷式冷凍機の7の第
2段冷却ステージ7Bに接触固定するとともに,その内
部の超電導コイル5,及び高温超電導電流リード6への
熱侵入を低減している。このように,冷凍機の第2段冷
却ステージ7Bと超電導コイル5の間に磁気シールド部
材19を設け,伝導冷却のための第1段冷却ステージ7
Aと超電導コイル5との熱的接触が充分に確保できない
場合においても,冷却促進部材としての外部冷却用銅ブ
ロック11を設けることによって,伝導による超電導コ
イルの冷却が可能である。尚,図中符号3Bは磁場利用
空間である。The heat shield plate 4 is fixed in contact with the second stage cooling stage 7B of the regenerator 7 and reduces heat invasion into the superconducting coil 5 and the high-temperature superconducting current lead 6 inside thereof. . As described above, the magnetic shield member 19 is provided between the second cooling stage 7B of the refrigerator and the superconducting coil 5, and the first cooling stage 7 for conduction cooling is provided.
Even when the thermal contact between A and the superconducting coil 5 cannot be sufficiently secured, the superconducting coil can be cooled by conduction by providing the external cooling copper block 11 as the cooling promoting member. Reference numeral 3B in the figure is a magnetic field utilization space.
【0023】図2は,この磁気シールド部材19の具体
的構成を示す要部縦断面図,図3は図2のI−I線断面
図であって,側部磁気シールド部材19は円周方向に等
角度間隔で分割することにより,任意の数,例えば,2
つの円弧状部材19A1,19A2からこれを構成する。ま
た,同様に外部冷却用銅ブロック11も2つの分割片1
1A,11Bを渦電流防止用絶縁板22,銅シート23
を介在させて端部を接合することにより構成されてい
る。FIG. 2 is a longitudinal sectional view of a main part showing a concrete structure of the magnetic shield member 19, and FIG. 3 is a sectional view taken along the line I--I of FIG. By dividing it into equiangular intervals,
This is composed of two arc-shaped members 19A1 and 19A2. Similarly, the external cooling copper block 11 is also divided into two pieces 1.
Insulating plate 22 for preventing eddy current, copper sheet 23 for 1A and 11B
It is configured by joining the end portions with interposing.
【0024】図3に示すように,各円弧状部材19A1,
19A2の各対向端面間には,クエンチ時の渦電流防止用
の電気絶縁材20を介在させている。上部及び下部の磁
気シールド部材19B,19Cは共にドーナツ型の円盤
形状の全く同一の形状を有している。超電導コイル5の
磁場分布の均一性を乱さないようにするために,同一形
状の磁気シールド部材5を超電導コイルの上下に対称的
に配置している。As shown in FIG. 3, each arcuate member 19A1,
An electrical insulating material 20 for preventing an eddy current at the time of quenching is interposed between the opposite end surfaces of 19A2. Both the upper and lower magnetic shield members 19B and 19C have the same donut-shaped disk shape. In order not to disturb the uniformity of the magnetic field distribution of the superconducting coil 5, the magnetic shield members 5 having the same shape are symmetrically arranged above and below the superconducting coil.
【0025】[0025]
【発明の効果】以上,説明したように,本発明によれ
ば,超電導コイルの周囲を鉄系の金属製の磁気シールド
部材によって取り囲むことによって,高温超電導電流リ
ードにおける超電導コイルからの漏れ磁場を減少させ,
高温超電導電流リードの臨界電流の低下を防止すること
ができる伝導冷却型超電導電磁石装置を提供することが
できる。As described above, according to the present invention, the leakage magnetic field from the superconducting coil in the high temperature superconducting current lead is reduced by surrounding the superconducting coil with the magnetic shield member made of iron-based metal. Let
It is possible to provide a conduction cooling type superconducting electromagnet device capable of preventing a decrease in the critical current of a high temperature superconducting current lead.
【0026】さらに,本発明によれば,冷凍機の冷却ス
テージと超電導コイルの間に磁気シールド部材が有っ
て,伝導冷却のための冷却ステージと超電導コイルとの
熱的接触が充分に確保できない場合においても,冷却促
進部材を設けることによって,伝導による超電導コイル
の冷却が可能である伝導冷却型超電導電磁石装置を提供
することができる。Further, according to the present invention, since there is a magnetic shield member between the cooling stage of the refrigerator and the superconducting coil, sufficient thermal contact between the cooling stage for conduction cooling and the superconducting coil cannot be ensured. Even in such a case, it is possible to provide a conduction cooling type superconducting electromagnet device capable of cooling the superconducting coil by conduction by providing the cooling promoting member.
【図1】本発明の実施例に係る伝導冷却型超電導電磁石
装置の一部縦断面図である。FIG. 1 is a partial vertical cross-sectional view of a conduction cooling type superconducting electromagnet apparatus according to an embodiment of the present invention.
【図2】図1の磁気シールド部材19の具体的構成を示
す要部縦断面図である。FIG. 2 is a longitudinal sectional view of an essential part showing a specific configuration of a magnetic shield member 19 of FIG.
【図3】図2のI−I線断面図である。3 is a cross-sectional view taken along the line I-I of FIG.
【図4】従来例に係る伝導冷却型超電導電磁石装置の一
部縦断面図である。FIG. 4 is a partial vertical cross-sectional view of a conduction cooling type superconducting electromagnet device according to a conventional example.
1 伝導冷却型超電導電磁石装置 4 熱シールド板 5 超電導コイル 6 高温超電導電流リード 7A 第1段冷却ステージ 7B 第2段冷却ステージ 9 コイル巻き枠 9A 巻き芯 9B 端部フランジ 10 巻線部 11 外周冷却用銅ブロック 13 常電導電流リード 19 磁気シールド部材 19A 側部磁気シールド部材 19B 上部磁気シールド部材 19C 下部磁気シールド部材 19A1,19A2 円弧状部材 20 低温側電極 21 電気絶縁材 DESCRIPTION OF SYMBOLS 1 Conduction cooling type superconducting electromagnet device 4 Heat shield plate 5 Superconducting coil 6 High temperature superconducting current lead 7A First stage cooling stage 7B Second stage cooling stage 9 Coil reel 9A Winding core 9B End flange 10 Winding part 11 For outer circumference cooling Copper block 13 Normal electric current flow lead 19 Magnetic shield member 19A Side magnetic shield member 19B Upper magnetic shield member 19C Lower magnetic shield member 19A1, 19A2 Arc member 20 Low temperature side electrode 21 Electrical insulating material
Claims (2)
ージ上に固定した伝導冷却型超電導電磁石装置におい
て, 前記超電導コイルの周囲を透磁率の大きな鉄系の金属製
の磁気シールド部材によって取り囲んだことを特徴とす
る伝導冷却型超電導電磁石装置。1. A conduction cooling type superconducting electromagnet apparatus in which a superconducting coil is fixed on a cooling stage of a regenerator, wherein the superconducting coil is surrounded by an iron-based metal magnetic shield member having a high magnetic permeability. A conduction cooling type superconducting electromagnet device characterized by:
装置において,前記磁気シールド部材は,前記冷却ステ
ージと前記超電導コイルの間に少なくとも設けられ,前
記超電導コイルは,周囲に熱伝導率の大きな冷却促進部
材が設けられていることを特徴とする伝導冷却型超電導
電磁石装置。2. The conduction cooling type superconducting electromagnet apparatus according to claim 1, wherein the magnetic shield member is provided at least between the cooling stage and the superconducting coil, and the superconducting coil has a large thermal conductivity in the surroundings. A conduction cooling type superconducting electromagnet device, which is provided with a cooling promoting member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5225702A JPH0786643A (en) | 1993-09-10 | 1993-09-10 | Conduction cooling superconducting magnet device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5225702A JPH0786643A (en) | 1993-09-10 | 1993-09-10 | Conduction cooling superconducting magnet device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0786643A true JPH0786643A (en) | 1995-03-31 |
Family
ID=16833465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5225702A Pending JPH0786643A (en) | 1993-09-10 | 1993-09-10 | Conduction cooling superconducting magnet device |
Country Status (1)
Country | Link |
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JP (1) | JPH0786643A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006261335A (en) * | 2005-03-16 | 2006-09-28 | Kobe Steel Ltd | Superconducting magnet apparatus |
JP2016032039A (en) * | 2014-07-29 | 2016-03-07 | 株式会社神戸製鋼所 | Superconducting magnet, superconducting magnet device, manufacturing method of superconducting magnet, and manufacturing method of superconducting magnet device |
JP2019087563A (en) * | 2017-11-02 | 2019-06-06 | 株式会社日立製作所 | Electromagnet device |
-
1993
- 1993-09-10 JP JP5225702A patent/JPH0786643A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006261335A (en) * | 2005-03-16 | 2006-09-28 | Kobe Steel Ltd | Superconducting magnet apparatus |
JP2016032039A (en) * | 2014-07-29 | 2016-03-07 | 株式会社神戸製鋼所 | Superconducting magnet, superconducting magnet device, manufacturing method of superconducting magnet, and manufacturing method of superconducting magnet device |
JP2019087563A (en) * | 2017-11-02 | 2019-06-06 | 株式会社日立製作所 | Electromagnet device |
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