JP2569466Y2 - Conduction-cooled superconducting magnet device - Google Patents
Conduction-cooled superconducting magnet deviceInfo
- Publication number
- JP2569466Y2 JP2569466Y2 JP7375392U JP7375392U JP2569466Y2 JP 2569466 Y2 JP2569466 Y2 JP 2569466Y2 JP 7375392 U JP7375392 U JP 7375392U JP 7375392 U JP7375392 U JP 7375392U JP 2569466 Y2 JP2569466 Y2 JP 2569466Y2
- Authority
- JP
- Japan
- Prior art keywords
- stage
- electromagnet
- shield
- conduction
- 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.)
- Expired - Lifetime
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は，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 cooled superconducting magnet device.
【０００２】[0002]
【従来の技術】従来，図２で示される伝導冷却型超電導
電磁石装置が提案されている。2. Description of the Related Art Conventionally, a conduction cooling type superconducting magnet device shown in FIG. 2 has been proposed.
【０００３】図２で示すように，伝導冷却型超電導電磁
石装置は，超電導コイル１及びこの超電導コイル１を巻
回した円筒状の巻枠２を有する電磁石部１０と，この電
磁石部１０を収容した磁気シールド部３とを備えてい
る。この電磁石部１０の下方には，冷凍機２０が設けら
れている。冷凍機２０は，蓄冷２段式冷凍機と呼ばれ，
第１段ステージ１１の下部に設けられこの第１段ステー
ジ１１を伝熱冷却する第１段部２１と，第２段ステージ
１２の下部に設けられ，この第２段ステージ２２を伝熱
冷却するに第２段部２２とを備えている。As shown in FIG. 2, the conduction cooling type superconducting electromagnet apparatus includes an electromagnet section 10 having a superconducting coil 1, a cylindrical winding frame 2 around which the superconducting coil 1 is wound, and the electromagnet section 10. And a magnetic shield part 3. A refrigerator 20 is provided below the electromagnet unit 10. The refrigerator 20 is called a regenerative two-stage refrigerator.
A first stage portion 21 provided below the first stage 11 for heat transfer cooling of the first stage 11 and a lower portion of the second stage 12 provided for heat transfer cooling of the second stage 22. And a second step portion 22.
【０００４】第２段ステージ１２上には，電磁石部１０
からの磁束を捕捉する磁気シールド部３が固定されてい
る。また，第２段ステージ１２の下部には，電磁石部１
０の超電導コイル１の端部に夫々接続された金属酸化物
超電導体による電流リード１３が設けられている。第１
段ステージ１１よりも上の部分全体は，電磁石部１０か
らの輻射熱を遮断する円筒キャップ状の輻射シールド部
４で覆われ，その輻射シールド部４の下部開口端は，第
１段ステージ１１の上面に固定され，内部が密閉されて
いる。On the second stage 12, an electromagnet unit 10 is provided.
The magnetic shield part 3 which captures the magnetic flux from the magnetic field is fixed. The electromagnet unit 1 is located below the second stage 12.
A current lead 13 made of a metal oxide superconductor connected to each end of the superconducting coil 1 is provided. First
The entire portion above the stage 11 is covered with a cylindrical cap-shaped radiation shield portion 4 that blocks radiant heat from the electromagnet portion 10, and the lower opening end of the radiation shield portion 4 is on the upper surface of the first stage 11. , And the inside is sealed.
【０００５】第１段ステージ１１の下方の冷凍機２０の
第１段部２１は，容器底部３１上に固定されており，こ
の第１段部２１の周囲に，この第１段部２１に平行に銅
電流リード１４が延びており，第１段ステージ１１に設
けられた貫通孔１１ａをとおして電流リード１３に接続
されている。容器底部３１よりも上の部分は，円筒キャ
ップ状の真空容器３０に覆われている。このような伝導
冷却型超電導電磁石装置の磁気シールド部３は，電磁石
部１０の周囲を，これに接近して囲んだ形である。この
磁気シールド部３は，電磁石部１０と一緒に絶対温度で
１０Ｋのレベルまで冷却される。[0005] The first stage 21 of the refrigerator 20 below the first stage 11 is fixed on the container bottom 31, and is arranged around and parallel to the first stage 21. A copper current lead 14 extends through the through hole 11 a provided in the first stage 11 and is connected to the current lead 13. The portion above the container bottom 31 is covered with a cylindrical cap-shaped vacuum container 30. The magnetic shield part 3 of such a conduction cooling type superconducting electromagnet apparatus has a shape surrounding the electromagnet part 10 in close proximity thereto. This magnetic shield part 3 is cooled together with the electromagnet part 10 to a level of 10K in absolute temperature.
【０００６】[0006]
【考案が解決しようとする課題】しかしながら，図２で
示す従来例においては，磁気シールド部３は，電磁石部
１０に接近しているので，高い磁場を形成する磁束４０
によって，磁気シールド部３が磁気飽和してしまい，シ
ールド効果が悪い。さらに，電磁石部１０のみならず，
磁気シールド部３までも１０Ｋ程度の低温にすること
は，無駄であるばかりか，冷凍機への負荷を増大するの
で，このタイプの超電導電磁石装置１２が，電磁石部１
０を所望する温度まで冷却するために必要な時間が長く
なるという欠点を生じた。However, in the conventional example shown in FIG. 2, since the magnetic shield 3 is close to the electromagnet 10, the magnetic flux 40 which forms a high magnetic field is used.
As a result, the magnetic shield portion 3 is magnetically saturated, and the shielding effect is poor. Furthermore, not only the electromagnet section 10 but also
Making the temperature of the magnetic shield part 3 as low as about 10K is not only wasteful but also increases the load on the refrigerator, so that the superconducting electromagnet device 12 of this type is
The disadvantage was that the time required to cool 0 to the desired temperature was lengthened.
【０００７】そこで，本考案の技術的課題は，装置全体
が小型化できるとともに，電磁石部の磁気シールド効果
を高め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。[0007] Therefore, a technical problem of the present invention is to provide a conduction-cooled superconducting electromagnet apparatus capable of reducing the size of the entire apparatus and enhancing the magnetic shielding effect of the electromagnet section.
【０００８】[0008]
【課題を解決するための手段】本考案によれば，第１段
ステージを冷却する第１段部と前記第１段部より上部の
第２段ステージを冷却する第２段部とを備えた冷凍機
と，前記第２段ステージ上に配置され，超電導コイルを
備えた電磁石部と，前記電磁石部に電気的に接続され，
前記第２段ステージ下端から前記第１段ステージを介し
て延在する電流リードと，前記電磁石部を磁気的に遮蔽
する磁気シールド部とを備えた伝導冷却型超電導電磁石
装置において，磁気シールドと輻射シールドとを兼ねる
シールド部によって前記第２段ステージとともに前記電
磁石部を覆った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, there is provided a first stage for cooling a first stage and a second stage for cooling a second stage above the first stage. A refrigerator, an electromagnet unit provided on the second stage and having a superconducting coil, and electrically connected to the electromagnet unit;
In a conduction-cooled superconducting electromagnet apparatus comprising a current lead extending from a lower end of the second stage through the first stage and a magnetic shield portion for magnetically shielding the electromagnet portion, a magnetic shield and radiation are provided. A conduction-cooled superconducting electromagnet device characterized in that the electromagnet portion is covered together with the second stage by a shield portion also serving as a shield.
【０００９】本考案によれば，前記伝導冷却型超電導電
磁石装置において，前記シールド部は前記第１段ステー
ジ上に設けられた伝熱性支持棒によって支持されている
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 cooled superconducting electromagnet apparatus, the shield portion is supported by a heat conductive support rod provided on the first stage. An electromagnet device is obtained.
【００１０】[0010]
【作用】本考案の伝導冷却型超電導電磁石装置において
は，シールド部によって第２段ステージとともに電磁石
部をこれより離れた位置で覆っているので，低磁場の位
置にて電磁石部の磁場に飽和されることなくシールドす
ることができ，シールド効果を高めるとともに，このシ
ールド部については，電熱用支持棒を介して第１段ステ
ージで１０Ｋよりも高い温度レベルに冷却することで，
冷却効率を高める。また，シールド部に磁気シールドと
輻射シールドとの２つの機能を持たせることによって，
コンパクト化することができる。In the conduction-cooled superconducting electromagnet apparatus of the present invention, since the shield section covers the electromagnet section together with the second stage at a position further away from the section, the section is saturated with the magnetic field of the electromagnet section at a low magnetic field. It can be shielded without the need to increase the shielding effect, and this shield part is cooled to a temperature level higher than 10K in the first stage through the support rod for electric heating.
Increase cooling efficiency. Also, by giving the shield part two functions, a magnetic shield and a radiation shield,
It can be made compact.
【００１１】[0011]
【実施例】以下，本考案の実施例について，図面を参照
して説明する。図１は本考案の実施例に係る伝導冷却型
超電導電磁石装置を示す断面図である。図１で示すよう
に，伝導冷却型超電導電磁石装置は，超電導コイル１
と，この超電導コイル１が巻回された巻枠２とを備えた
電磁石部１０を備えている。この巻枠２の下方には，第
２段ステージ１２を冷却する第２段部２２及び第１段ス
テージ１１を冷却する第１段部２１を備えた冷凍機２０
が設けられている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing 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 comprises a superconducting coil 1
And an electromagnet section 10 having a winding frame 2 around which the superconducting coil 1 is wound. A refrigerator 20 having a second stage 22 for cooling the second stage 12 and a first stage 21 for cooling the first stage 11 is provided below the bobbin 2.
Is provided.
【００１２】図１で示す本考案の実施例と図２で示す従
来例との相違点は，磁気シールドと輻射シールドとを兼
ねた一体のシールド部５を形成している点にある。この
シールド部５は，電磁石部１０の上部から第２段ステー
ジ１２の下部まで覆うように延在している。特に，シー
ルド部５の側壁は，電磁石部１０の外周から十分離れる
ようにしている。The difference between the embodiment of the present invention shown in FIG. 1 and the conventional example shown in FIG. 2 is that an integrated shield portion 5 which serves both as a magnetic shield and a radiation shield is formed. The shield part 5 extends so as to cover from the upper part of the electromagnet part 10 to the lower part of the second stage 12. In particular, the side wall of the shield part 5 is sufficiently separated from the outer periphery of the electromagnet part 10.
【００１３】第２段ステージ１２の両側の電流リード１
３及び中央部に設けられた冷凍機の第２段部２２は第２
段ステージ１２から，このシールド部５の底壁に設けら
れた貫通穴７を夫々貫通して，第１段ステージ１１に至
っている。シールド部５の底壁の縁端部と，第１段ステ
ージ１１の縁端部との間には，複数の伝熱支持棒８が設
けられ，この周囲を円筒状の断熱部９で覆っている。第
１段ステージ１１と真空容器３０の底部３１との間に
は，従来例と同様に，冷凍機２０の第１段部２１及び銅
電流リード１４が配置される。以上の装置全体をカップ
状の真空容器３０で覆っている。The current leads 1 on both sides of the second stage 12
3 and the second stage portion 22 of the refrigerator provided in the center portion is the second stage portion.
The first stage 11 extends from the stage 12 through the through holes 7 provided in the bottom wall of the shield portion 5. A plurality of heat transfer support rods 8 are provided between the edge of the bottom wall of the shield part 5 and the edge of the first stage 11, and the periphery thereof is covered with a cylindrical heat insulating part 9. I have. Between the first stage 11 and the bottom 31 of the vacuum vessel 30, the first stage 21 of the refrigerator 20 and the copper current lead 14 are arranged as in the conventional example. The entire apparatus described above is covered with a cup-shaped vacuum vessel 30.
【００１４】超電導コイル１の両端は，電流リード１３
に夫々接続され，銅電流リード１４を介して，真空容器
３０の底部３１に設けられた端子２３に夫々接続され
る。Both ends of the superconducting coil 1 are connected to current leads 13
Are connected to terminals 23 provided on the bottom 31 of the vacuum vessel 30 via the copper current leads 14, respectively.
【００１５】ここで，シールド部５の冷却は，シールド
部５を支持する伝熱支持棒８を介して，冷凍機の第１段
ステージ１１によって，１０Ｋよりも高い液体窒素温度
レベルまで冷却される。Here, the shield 5 is cooled to a liquid nitrogen temperature level higher than 10 K by the first stage 11 of the refrigerator through the heat transfer support rod 8 supporting the shield 5. .
【００１６】尚，このシールド部５の主な役割は，電流
リード１３への磁束を遮断することにあるので，電流リ
ード１３の低温端（冷凍機の第二段ステージ１２側）に
シールド部５を設けるが，従来のシールド位置と違っ
て，より電磁石部１０側から離れる。シールド部５の底
部の磁場は従来の磁気シールド３の底部より低いため，
磁気飽和し難く，磁気の遮蔽が容易になり，電流リード
１３への漏れ磁束をより減少させることができる。電磁
石部１０は，第２段ステージより１０Ｋレベルまで冷却
されるが，シールド部５の冷却は，冷凍機の第１段ステ
ージにより行われ液体窒素温度レベルに止められる。こ
うすると，第２段ステージ（１０Ｋレベル）の冷却ロス
が減ぜられる。更に，電磁石部１０の冷却時間を短縮
し，第１段ステージ１１の冷凍能力を有効に利用できる
他，磁気シールド効果も上昇させることができる。Since the main role of the shield part 5 is to cut off the magnetic flux to the current lead 13, the shield part 5 is connected to the low-temperature end of the current lead 13 (to the second stage 12 of the refrigerator). However, unlike the conventional shield position, it is further away from the electromagnet section 10 side. Since the magnetic field at the bottom of the shield 5 is lower than the bottom of the conventional magnetic shield 3,
Magnetic saturation is less likely to occur, magnetic shielding is facilitated, and magnetic flux leakage to the current lead 13 can be further reduced. The electromagnet unit 10 is cooled down to a level of 10 K from the second stage, but the shield unit 5 is cooled by the first stage of the refrigerator and is stopped at the liquid nitrogen temperature level. This reduces the cooling loss of the second stage (10K level). Further, the cooling time of the electromagnet unit 10 can be shortened, the refrigeration capacity of the first stage 11 can be effectively used, and the magnetic shielding effect can be increased.
【００１７】[0017]
【考案の効果】以上，説明したように，本考案において
は，シールド部が電磁石部より離れた所のより低磁場部
分に設置されているので，磁気シールド効果の高い伝導
冷却型超電導電磁石装置を提供することができる。[Effects of the Invention] As described above, in the present invention, since the shield portion is installed in a lower magnetic field portion away from the electromagnet portion, a conductive cooling type superconducting electromagnet device having a high magnetic shield effect can be provided. Can be provided.
【００１８】また，本考案によれば，シールド部が磁気
シールドと輻射シールドとの２つの機能を有することに
よって，コンパクトな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, a compact conduction-cooled superconducting electromagnet apparatus can be provided because the shield portion has two functions of a magnetic shield and a radiation shield.
【００１９】さらに，本考案によれば，シールド部の冷
却を，冷凍機の第１段ステージで行うことによって，第
１段ステージと第２段ステージの熱負荷をより均等に分
布させることができ，冷凍効率の高い伝導冷却型超電導
電磁石装置を提供することができる。Further, according to the present invention, the cooling of the shield portion is performed in the first stage of the refrigerator, so that the heat loads of the first stage and the second stage can be more evenly distributed. Thus, it is possible to provide a conduction cooling type superconducting electromagnet apparatus having high refrigeration efficiency.
【図１】本考案の実施例に係る伝導冷却型超電導電磁石
装置を示す断面図である。FIG. 1 is a sectional view showing a conduction cooling type superconducting magnet device according to an embodiment of the present invention.
【図２】従来例に係る伝導冷却型超電導電磁石装置を示
す断面図である。FIG. 2 is a sectional view showing a conduction cooling type superconducting electromagnet device according to a conventional example.
１ 超電導コイル ２ コイルの巻枠 ３ 磁気シールド部 ４ 輻射シールド部 ５ シールド部 ７ 貫通孔 ８ 伝熱支持棒 ９ 容器 １０ 電磁石部 １１ 第１段ステージ １２ 第２段ステージ １３ 電流リード １４ 銅電流リード ２０ 冷凍機 ２１ 第１段部 ２２ 第２段部 ２３ 端子 ３０ 真空容器 ３１ 容器底部 ４０ 磁束 DESCRIPTION OF SYMBOLS 1 Superconducting coil 2 Coil winding frame 3 Magnetic shield part 4 Radiation shield part 5 Shield part 7 Through hole 8 Heat transfer support rod 9 Container 10 Electromagnet part 11 First stage 12 Second stage 13 Current lead 14 Copper current lead 20 Refrigerator 21 First stage section 22 Second stage section 23 Terminal 30 Vacuum container 31 Container bottom 40 Magnetic flux
Claims (2)
記第１段部より上部の第２段ステージを冷却する第２段
部とを備えた冷凍機と，前記第２段ステージ上に配置さ
れ，超電導コイルを備えた電磁石部と，前記電磁石部に
電気的に接続され，前記第２段ステージ下端から前記第
１段ステージを介して延在する電流リードと，前記電磁
石部を磁気的に遮蔽する磁気シールド部とを備えた伝導
冷却型超電導電磁石装置において，磁気シールドと輻射
シールドとを兼ねるシールド部によって前記第２段ステ
ージとともに前記電磁石部を覆ったことを特徴とする伝
導冷却型超電導電磁石装置。A refrigerator provided with a first stage for cooling the first stage and a second stage for cooling a second stage above the first stage; An electromagnet section provided with a superconducting coil, a current lead electrically connected to the electromagnet section and extending from a lower end of the second stage through the first stage, and In a conduction cooling type superconducting magnet device having a magnetic shield portion for electrically shielding, the conduction cooling type superconducting magnet device, wherein the electromagnet portion is covered together with the second stage by a shield portion serving as a magnetic shield and a radiation shield. Superconducting electromagnet device.
装置において，前記シールド部は前記第１段ステージ上
に設けられた伝熱性支持棒によって支持されていること
を特徴とする伝導冷却型超電導電磁石装置。2. The conduction-cooled superconducting electromagnet apparatus according to claim 1, wherein said shield portion is supported by a heat-conducting support rod provided on said first stage. Electromagnet device.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7375392U JP2569466Y2 (en) | 1992-10-22 | 1992-10-22 | Conduction-cooled superconducting magnet device |
| US08/114,173 US5623240A (en) | 1992-10-20 | 1993-09-01 | Compact superconducting magnet system free from liquid helium |
| DE69324436T DE69324436T2 (en) | 1992-10-20 | 1993-09-30 | Compact superconducting magnet system without liquid helium |
| DE69333128T DE69333128T2 (en) | 1992-10-20 | 1993-09-30 | Power supply line for superconducting magnet system without liquid helium |
| EP97121654A EP0837478B1 (en) | 1992-10-20 | 1993-09-30 | Current lead for a superconducting magnet system free from liquid helium |
| EP93115827A EP0596249B1 (en) | 1992-10-20 | 1993-09-30 | Compact superconducting magnet system free from liquid helium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7375392U JP2569466Y2 (en) | 1992-10-22 | 1992-10-22 | Conduction-cooled superconducting magnet device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0638208U JPH0638208U (en) | 1994-05-20 |
| JP2569466Y2 true JP2569466Y2 (en) | 1998-04-22 |
Family
ID=13527332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7375392U Expired - Lifetime JP2569466Y2 (en) | 1992-10-20 | 1992-10-22 | Conduction-cooled superconducting magnet device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2569466Y2 (en) |
-
1992
- 1992-10-22 JP JP7375392U patent/JP2569466Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0638208U (en) | 1994-05-20 |
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