JP2913939B2 - Superconducting current lead - Google Patents
Superconducting current leadInfo
- Publication number
- JP2913939B2 JP2913939B2 JP3264547A JP26454791A JP2913939B2 JP 2913939 B2 JP2913939 B2 JP 2913939B2 JP 3264547 A JP3264547 A JP 3264547A JP 26454791 A JP26454791 A JP 26454791A JP 2913939 B2 JP2913939 B2 JP 2913939B2
- Authority
- JP
- Japan
- Prior art keywords
- current lead
- superconducting
- temperature
- low
- superconductor
- 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
Links
- 239000002887 superconductor Substances 0.000 claims description 13
- 239000001307 helium Substances 0.000 claims description 12
- 229910052734 helium Inorganic materials 0.000 claims description 12
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 239000004020 conductor Substances 0.000 description 8
- 230000000087 stabilizing effect Effects 0.000 description 8
- 229910002480 Cu-O Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910015901 Bi-Sr-Ca-Cu-O Inorganic materials 0.000 description 1
- 229910020658 PbSn Inorganic materials 0.000 description 1
- 101150071746 Pbsn gene Proteins 0.000 description 1
- 229910003808 Sr-Cu Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- SWQJXJOGLNCZEY-BJUDXGSMSA-N helium-3 atom Chemical compound [3He] SWQJXJOGLNCZEY-BJUDXGSMSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- MHIGBKBJSQVXNH-IWVLMIASSA-N methacycline Chemical compound C=C([C@H]1[C@@H]2O)C3=CC=CC(O)=C3C(=O)C1=C(O)[C@@]1(O)[C@@H]2[C@H](N(C)C)C(O)=C(C(N)=O)C1=O MHIGBKBJSQVXNH-IWVLMIASSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910001281 superconducting alloy Inorganic materials 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、極低温下におかれる超
電導機器と室温下におかれる電源等の電力供給部を結ぶ
ための電流リードの改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a current lead for connecting a superconducting device at a very low temperature to a power supply such as a power supply at a room temperature.
【０００２】[0002]
【従来の技術】超電導機器に使用される電流リードは、
導体の通電による発熱と高温部からの熱伝導による侵入
熱の和を最小にし、ヘリウム蒸発量を最低にするような
導体断面積で使用される。2. Description of the Related Art Current leads used in superconducting equipment are:
It is used with a conductor cross-sectional area that minimizes the sum of heat generated by conduction of the conductor and intrusion heat due to heat conduction from the high-temperature portion, and minimizes the amount of helium evaporation.
【０００３】通常、電流リードは導体材料として銅線を
使うことが多いが、Ａｇで被覆された酸化物系超電導線
材もしくは被覆のないバルクの酸化物系超電導体を用い
た電流リードについても検討されている。[0003] Normally, a current lead often uses a copper wire as a conductor material, but a current lead using an oxide-based superconducting wire coated with Ag or a bulk oxide-based superconductor without a coating has also been studied. ing.
【０００４】電流リードの導体として酸化物系超電導体
を用いる場合、低抵抗の常電導金属からなる安定化材を
被覆した超電導線材を使用する場合と、常電導金属の被
覆のないバルクの超電導体を使用する場合とがある。[0004] When an oxide superconductor is used as a conductor of a current lead, a superconducting wire coated with a stabilizing material made of a low-resistance normal metal is used, and a bulk superconductor without a normal metal coating is used. May be used.
【０００５】[0005]
【発明が解決しようとする課題】しかし、前者の場合は
安定化材による熱伝導を低減することが難しくなり、後
者の場合ではクエンチ等による電流リードの発熱で安定
性、信頼性が問題となる。However, in the former case, it is difficult to reduce the heat conduction by the stabilizing material, and in the latter case, the stability and reliability are problematic due to the heat generated by the current leads due to quench and the like. .
【０００６】本発明の目的は、電流リード本体から液体
ヘリウム容器への侵入熱、通電による発熱等を低減し、
液体ヘリウムの消費または冷凍機の負荷を減少させて経
済的効果を向上させることが可能な超電導機器用電流リ
ードを提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to reduce heat entering the liquid helium container from the current lead body, heat generation due to energization, and the like.
An object of the present invention is to provide a current lead for a superconducting device capable of reducing the consumption of liquid helium or the load on a refrigerator to improve the economic effect.
【０００７】[0007]
【課題を解決するための手段】本発明の要旨は、電流リ
ード本体の低温側の導体を、液体ヘリウム温度で超電導
を示す金属材を安定化材として被覆した酸化物系超電導
体で構成することにより、安定化材の熱伝導による熱侵
入を低減したことにある。The gist of the present invention is that the conductor on the low temperature side of the current lead body is composed of an oxide superconductor coated with a metal material exhibiting superconductivity at liquid helium temperature as a stabilizing material. Thus, heat penetration due to heat conduction of the stabilizer is reduced.
【０００８】この場合、酸化物系超電導体としては、超
電導臨界温度が２０Ｋ以上の超電導体、例えばＹ−Ｂａ
−Ｃｕ−Ｏ、Ｂｉ−Ｓｒ−Ｃｕ−Ｏ、Ｂｉ−Ｓｒ−Ｃａ
−Ｃｕ−Ｏ、Ｔｌ−Ｂａ−Ｃｕ−Ｏ、Ｔｌ−Ｂａ−Ｃａ
−Ｃｕ−Ｏ、Ｔｌ−Ｓｒ−Ｃａ−Ｃｕ−Ｏ、Ｌａ−Ｎａ
−Ｃｕ−Ｏ、Ｌａ−Ｂａ−Ｃｕ−Ｏ、Ｌａ−Ｓｒ−Ｃｕ
−Ｏ等の多くのものが使用できる。また、その安定化材
としての金属材としては、２０Ｋ以下の超電導臨界温度
を持つ超電導体、例えばＮｂ、Ｐｂ、ＮｂＴｉ、ＮｂＺ
ｒ、ＰｂＳｎ、ＮｂＴｉＳｎ、Ｇａ、ＰｂＩｎ、ＰｂＢ
ｉ、Ｌａ、Ｖ、ＰｂＣｕＨ、ＭｏＴｃ、ＭｏＲｅ、Ｔ
ｃ、Ｂｉ等の金属、合金又は化合物を使用することがで
きる。In this case, as the oxide-based superconductor, a superconductor having a superconducting critical temperature of 20 K or more, for example, Y-Ba
-Cu-O, Bi-Sr-Cu-O, Bi-Sr-Ca
—Cu—O, Tl—Ba—Cu—O, Tl—Ba—Ca
-Cu-O, Tl-Sr-Ca-Cu-O, La-Na
-Cu-O, La-Ba-Cu-O, La-Sr-Cu
Many such as -O can be used. Further, as the metal material as the stabilizing material, a superconductor having a superconducting critical temperature of 20 K or less, for example, Nb, Pb, NbTi, NbZ
r, PbSn, NbTiSn, Ga, PbIn, PbB
i, La, V, PbCuH, MoTc, MoRe, T
Metals, alloys or compounds such as c and Bi can be used.
【０００９】[0009]
【実施例】図１は、本発明に係る電流リードの一実施例
の概要を示したもので、容器１中の液体ヘリウム２に浸
された超電導コイル３を常温側端子４と接続する電流リ
ード５は、中間を接続部６で接続された低温部５ａと高
温部５ｂからなっている。しかして接続部６は、液体窒
素または冷凍機を用いて冷却された低温アンカー９下に
置かれて冷却されている。また低温部５ａは超電導コイ
ル３側の端子７と接続され、蒸発するヘリウムガス８に
よって低温アンカーまで冷却されるようになっている。
一方、高温部５ｂは常電導金属から構成され、常温側の
端子４を経由して超電導コイル用の電源１０に接続され
ている。FIG. 1 shows an outline of an embodiment of a current lead according to the present invention. A current lead for connecting a superconducting coil 3 immersed in liquid helium 2 in a container 1 to a room temperature side terminal 4 is shown. Numeral 5 is composed of a low-temperature portion 5a and a high-temperature portion 5b whose middle portions are connected by a connection portion 6. The connection 6 is thus cooled by placing it under a cold anchor 9 cooled using liquid nitrogen or a refrigerator. The low temperature section 5a is connected to the terminal 7 on the superconducting coil 3 side, and is cooled to a low temperature anchor by the evaporating helium gas 8.
On the other hand, the high temperature section 5b is made of a normal conducting metal and is connected to a power supply 10 for a superconducting coil via a normal temperature side terminal 4.
【００１０】図２は、電流リード５の低温部５ａの断面
を示したもので、この導体は、例えばＴｌ系の酸化物超
電導体からなるコア１２をＰｂからなる安定化材１３で
被覆したテープ状線材１１を複数枚積層集合化した構造
となっている。FIG. 2 shows a cross section of the low-temperature portion 5a of the current lead 5. This conductor is, for example, a tape in which a core 12 made of a Tl-based oxide superconductor is covered with a stabilizing material 13 made of Pb. It has a structure in which a plurality of wire rods 11 are stacked and assembled.
【００１１】図３は、電流リード５の低温部５ａの別の
実施例を示している。FIG. 3 shows another embodiment of the low-temperature portion 5a of the current lead 5.
【００１２】この導体の低温部５ａを構成する各テープ
状線材は夫々酸化物系超電導体のコア１２を被覆する安
定化材１４としてＮｂＴｉ超電導合金を用いたもので、
コア１２と被覆１４との間にはＡｇからなる拡散バリア
層１５が設けられている。Each of the tape-shaped wires constituting the low-temperature portion 5a of the conductor uses an NbTi superconducting alloy as a stabilizing material 14 for covering the core 12 of the oxide superconductor.
A diffusion barrier layer 15 made of Ag is provided between the core 12 and the coating 14.
【００１３】このような構成の電流リードにおいては、
安定化材として熱伝導率が銅のような常電導体より遥か
に小さい超電導体を用いているので、熱伝導による侵入
熱を低減し、液体ヘリウム２の蒸発量を低減することが
でき、ヘリウム寒剤費の節約、超電導機器の連続運転の
長期化、寒剤補給のコスト低減等が可能となる。In a current lead having such a configuration,
Since a superconductor having a thermal conductivity much smaller than that of a normal conductor such as copper is used as a stabilizing material, it is possible to reduce heat intrusion due to heat conduction and reduce the amount of evaporation of liquid helium 2, thereby reducing helium. It is possible to save the cost of the cryogen, prolong the continuous operation of the superconducting equipment, and reduce the cost of replenishing the cryogen.
【００１４】低温部５ａ側は超電導体による安定化材１
２、１３を有しているため、クエンチ等に対する安定
性、信頼性が確保されることは勿論である。The low-temperature portion 5a has a stabilizing material 1 made of a superconductor.
Of course, the presence of 2 and 13 ensures stability and reliability against quench and the like.
【００１５】[0015]
【発明の効果】以上の説明から明らかなように、本発明
の電流リードによれば、高温部からの侵入熱を低減して
液体ヘリウムの消費または冷凍機の負荷を減少させるこ
とができる効果がある。As is apparent from the above description, according to the current lead of the present invention, there is an effect that the heat intruding from the high-temperature portion can be reduced and the consumption of liquid helium or the load on the refrigerator can be reduced. is there.
【図１】本発明に係る電流リードの一実施例の概要を説
明図。FIG. 1 is a diagram illustrating an outline of an embodiment of a current lead according to the present invention.
【図２】電流リード低温部の断面図。FIG. 2 is a cross-sectional view of a low-temperature portion of a current lead.
【図３】本発明に係る電流リードの別の実施例における
低温部の断面図。FIG. 3 is a cross-sectional view of a low-temperature portion in another embodiment of the current lead according to the present invention.
２ 液体ヘリウム ３ 超電導コイル ４及び７ 端子 ５ 電流リード ６ 接続部 ８ ヘリウムガス ９ 低温アンカー １０ 電源 １２ 酸化物系超電導体のコア １３及び１４ 安定化材 2 Liquid helium 3 Superconducting coil 4 and 7 Terminal 5 Current lead 6 Connection 8 Helium gas 9 Low temperature anchor 10 Power supply 12 Core of oxide superconductor 13 and 14 Stabilizer
Claims (1)
を経由して室温と液体ヘリウム温度との間で電流を流す
ために使用される常電導部及び超電導部を備える超電導
電流リードであって、前記超電導部を液体ヘリウム温度
で超電導を示す金属材で被覆された酸化物系超電導体で
構成したことを特徴とする超電導電流リード。1. A superconducting current lead having a normal conducting portion and a superconducting portion used for flowing an electric current between room temperature and liquid helium temperature via a low temperature anchor using liquid nitrogen or a refrigerator. A superconducting current lead, wherein the superconducting portion is formed of an oxide superconductor coated with a metal material exhibiting superconductivity at liquid helium temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3264547A JP2913939B2 (en) | 1991-10-14 | 1991-10-14 | Superconducting current lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3264547A JP2913939B2 (en) | 1991-10-14 | 1991-10-14 | Superconducting current lead |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05109529A JPH05109529A (en) | 1993-04-30 |
| JP2913939B2 true JP2913939B2 (en) | 1999-06-28 |
Family
ID=17404790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3264547A Expired - Lifetime JP2913939B2 (en) | 1991-10-14 | 1991-10-14 | Superconducting current lead |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2913939B2 (en) |
-
1991
- 1991-10-14 JP JP3264547A patent/JP2913939B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05109529A (en) | 1993-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5298679A (en) | Current lead for cryostat using composite high temperature superconductors | |
| JP3151159B2 (en) | Superconducting current lead | |
| JP2015028912A (en) | Superconductive wire rod and superconductive coil using the same | |
| JP2913939B2 (en) | Superconducting current lead | |
| Yamada et al. | HTS current leads prepared by the TFA-MOD processed YBCO tapes | |
| US8306590B2 (en) | Process for the preparation of low contact resistant contact on a high transition temperature superconductors | |
| JP3007956B2 (en) | Current lead for superconducting coil using functionally graded material | |
| JP2929622B2 (en) | How to use oxide superconductor | |
| JPH11260162A (en) | Superconducting current lead | |
| US5308831A (en) | Method of making a connection between a high critical temperature superconductive ceramic and a superconductor based on niobium-titanium | |
| CN1044941C (en) | Superconductive current lead | |
| JPH05198434A (en) | Superconductive current lead | |
| Yamada et al. | Development of HTS current leads prepared by the TFA-MOD processed YBCO tapes | |
| JP2981810B2 (en) | Current lead of superconducting coil device | |
| JPH02256206A (en) | Superconducting power lead | |
| JP2768776B2 (en) | Conductor for current lead | |
| JPH05109530A (en) | Superconducting current lead | |
| JP3127705B2 (en) | Current lead using oxide superconductor | |
| JP2599269B2 (en) | Superconducting wire | |
| KR100750963B1 (en) | Structure of low AC loss high temperature superconducting tapes and a fabrication method thereof | |
| JP2898713B2 (en) | Current lead | |
| JPH06314612A (en) | Oxide superconducting current lead | |
| JP2507905B2 (en) | Stabilized superconducting wire | |
| JPH04255203A (en) | Oxide superconducting current lead | |
| JPH06309952A (en) | Oxide superconductor |