JPH03219604A - Superconducting magnet device - Google Patents
Superconducting magnet deviceInfo
- Publication number
- JPH03219604A JPH03219604A JP1356190A JP1356190A JPH03219604A JP H03219604 A JPH03219604 A JP H03219604A JP 1356190 A JP1356190 A JP 1356190A JP 1356190 A JP1356190 A JP 1356190A JP H03219604 A JPH03219604 A JP H03219604A
- Authority
- JP
- Japan
- Prior art keywords
- liquid helium
- superconducting magnet
- gas
- current lead
- helium
- 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.)
- Pending
Links
- 238000011084 recovery Methods 0.000 claims description 5
- 239000001307 helium Substances 0.000 abstract description 37
- 229910052734 helium Inorganic materials 0.000 abstract description 37
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 36
- 239000007788 liquid Substances 0.000 abstract description 30
- 239000007789 gas Substances 0.000 abstract description 14
- 238000001816 cooling Methods 0.000 abstract description 12
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- SWQJXJOGLNCZEY-BJUDXGSMSA-N helium-3 atom Chemical compound [3He] SWQJXJOGLNCZEY-BJUDXGSMSA-N 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract 2
- 238000009833 condensation Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 150000002371 helium Chemical class 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【発明の詳細な説明】 口発明の目的］ （産業上の利用分野） 本発明は冷凍機を備えた超電導磁石装置に関する。[Detailed description of the invention] Purpose of invention] (Industrial application field) The present invention relates to a superconducting magnet device equipped with a refrigerator.
（従来の技術）
従来の寒剤、例えば液体ヘリウムを使用して冷却される
超電導磁石装置を第２図に示す。超電導磁石２１は液体
ヘリウム槽２２内に貯液された液体ヘリウム２３によっ
て冷却される。液体ヘリウム槽２２は常温部からの侵入
熱を減らすために真空槽２４内において冷却シールド板
２５．２５’に取り囲まれている。この冷却シールド板
２５゜２５′はシールド冷凍機２６によっておよそ８０
におよび２０Ｋに冷却され、室温部から液体ヘリウム槽
への輻射による侵入熱を抑えている。超電導磁石２１は
外部から電流リード線２７により電流を供給して作動さ
せる。この電流リード線２７は常温端子２８から超電導
磁石２１まで接続しており、この部分を通じての熱伝導
による侵入熱があることの他に、通電によるジュール熱
が発生する。したがって、電流リードの冷却が必要とさ
れる。従来の超電導磁石装置では電流リードの冷却方法
は、液体ヘリウム槽内で蒸発したヘリウムガスを電流リ
ード内に流し、冷却する方法が行なわれている。(Prior Art) A superconducting magnet device cooled using a conventional cryogen, such as liquid helium, is shown in FIG. The superconducting magnet 21 is cooled by liquid helium 23 stored in a liquid helium tank 22 . The liquid helium tank 22 is surrounded by a cooling shield plate 25, 25' within the vacuum tank 24 to reduce heat intrusion from the room temperature section. This cooling shield plate 25°25' is approximately 80° by the shield refrigerator 26.
The liquid helium tank is cooled to 20K, suppressing heat intrusion from room temperature into the liquid helium tank due to radiation. The superconducting magnet 21 is operated by supplying current from the outside through a current lead wire 27. This current lead wire 27 is connected from the normal temperature terminal 28 to the superconducting magnet 21, and in addition to the intrusion heat due to heat conduction through this portion, Joule heat is generated due to energization. Therefore, cooling of the current leads is required. In conventional superconducting magnet devices, the current lead is cooled by flowing helium gas evaporated in a liquid helium tank into the current lead.
（発明が解決しようとする問題点）
上記の方法は寒剤である液体ヘリウムが気化したヘリウ
ムガスが室温になるまでの顕熱（エンタルピー差）を利
用するので冷却に必要とするヘリウムガス量は少なくて
すむが、常温端子部で大気放出するので液体ヘリウム槽
内の液体ヘリウムは徐々に減少することになる。したが
って、液体ヘリウムの蒸発速度に応じて超電導磁石の運
転時間に制限があることになる。(Problem to be solved by the invention) The above method uses the sensible heat (enthalpy difference) of the vaporized helium gas from liquid helium, which is a cryogen, until it reaches room temperature, so the amount of helium gas required for cooling is small. However, the liquid helium in the liquid helium tank gradually decreases because it is released into the atmosphere at the normal temperature terminal. Therefore, there is a limit to the operating time of the superconducting magnet depending on the evaporation rate of liquid helium.
なお、超電導磁石を永久電流状態にし電流リードを超電
導磁石から切り離し、液体ヘリウムの蒸発を抑える方法
もあるが、励磁電流を変える場合にはこの方法が適用で
きない。Note that there is a method to suppress evaporation of liquid helium by putting the superconducting magnet in a persistent current state and separating the current lead from the superconducting magnet, but this method cannot be applied when changing the excitation current.
本発明は、液体ヘリウムなどの寒剤が蒸発して減少する
ことを防ぎ、超電導磁石の運転時間に対する制限をなく
す装置を得ることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a device that prevents a cryogen such as liquid helium from being reduced by evaporation and eliminates restrictions on the operating time of a superconducting magnet.
［発明の構成コ
（問題点を解決するための手段）
本発明は、電流リードを冷却して常温になった寒剤の気
化したガスを回収し、凝縮冷凍機により再凝縮して液体
に戻す回収再凝縮システムを備えることにより寒剤の蒸
発による減少を防いで運転時間の制限をなくした超電導
磁石装置である。[Structure of the Invention (Means for Solving Problems)] The present invention cools the current lead, collects the vaporized cryogen gas that has reached room temperature, and recondenses it using a condensing refrigerator to return it to a liquid. This superconducting magnet device is equipped with a recondensation system to prevent cryogen from decreasing due to evaporation and eliminates operating time limitations.
（実施例）
以下、本発明の実施例について図面に基づいて説明する
。第１図は本発明の超電導磁石装置の説明図である。こ
こでは寒剤としては液体ヘリウムを用いている。超電導
磁石１は液体ヘリウム槽２内の液体ヘリウム３によって
冷却され、液体ヘリウム槽２は真空槽４内の冷却シール
ド板５，５′で取り囲まれている。超電導磁石は電流リ
ード線７により外部の電源につながっている。(Example) Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is an explanatory diagram of a superconducting magnet device of the present invention. Here, liquid helium is used as the cryogen. The superconducting magnet 1 is cooled by liquid helium 3 in a liquid helium tank 2, and the liquid helium tank 2 is surrounded by cooling shield plates 5, 5' in a vacuum tank 4. The superconducting magnet is connected to an external power source by a current lead wire 7.
液体ヘリウム槽２から蒸発したヘリウムガスは電流リー
ド７を冷却しながら常温端子８の方向へ向かう。常温端
子付近に達したヘリウムガスは常温に近い温度になって
いる。従来の装置ではこのヘリウムガスは大気中に放出
されるのであるが、本発明の装置においては循環ポンプ
１０により回収配管９へ送り込まれる。回収配管は冷却
シールド板５，５′を冷却するシールド冷却機６との熱
交換構造を有しており、回収配管内のヘリウムガスは最
初に約８０Ｋに、ついで約２０Ｋまで冷却される。およ
そ２０Ｋまで冷却されたヘリウムガスは凝縮冷凍機１１
によりジュールトムソン弁により断熱膨張して４．４に
の液体ヘリウムへ再凝縮させられる。Helium gas evaporated from the liquid helium tank 2 heads toward the normal temperature terminal 8 while cooling the current lead 7. When the helium gas reaches the room temperature terminal, its temperature is close to room temperature. In the conventional device, this helium gas is released into the atmosphere, but in the device of the present invention, it is sent to the recovery pipe 9 by the circulation pump 10. The recovery pipe has a heat exchange structure with a shield cooler 6 that cools the cooling shield plates 5, 5', and the helium gas in the recovery pipe is first cooled to about 80K and then to about 20K. The helium gas cooled to approximately 20K is transferred to the condensing refrigerator 11.
It is adiabatically expanded by the Joule-Thompson valve and recondensed into liquid helium at a temperature of 4.4 mm.
以上の例では寒剤が液体ヘリウムの場合について述べた
が、寒剤として他の物質を使用した場合も、冷却温度な
どが異なることがあるとしても、同様な装置で作動可能
である。Although the above example deals with the case where the cryogen is liquid helium, it is possible to operate with a similar device even if other substances are used as the cryogen, even if the cooling temperature etc. may be different.
［発明の効果］
本発明の装置により、寒剤である液体ヘリウムの蒸発が
ゼロとなり超電導磁石の運転時間に制限がなくなる効果
がある。[Effects of the Invention] The device of the present invention has the effect that evaporation of liquid helium, which is a cryogen, becomes zero, and there is no limit to the operating time of a superconducting magnet.
第１図は本発明の実施例の超電導磁石装置の説明図、第
２図は従来の超電導磁石装置の説明図である。
１．２１・・・超電導磁石、２，２２・・・液体ヘリウ
ム槽、３，２Ｇ・・・液体ヘリウム、４，２４・・・真
空槽、５．５’ 、２５，２５’・・・冷却シールド板
、６，２６・・・シールド冷凍機、７，２７・・・電流
リード、８，２８・・・電流リード常温端子、９・・・
回収配管、１０・・・循環ポンプ、１１・・・凝縮冷凍
機。
１０循環ポンプ
第１図
８電流リードFIG. 1 is an explanatory diagram of a superconducting magnet device according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional superconducting magnet device. 1.21...Superconducting magnet, 2,22...Liquid helium tank, 3,2G...Liquid helium, 4,24...Vacuum tank, 5.5', 25,25'...Cooling Shield plate, 6, 26... Shield refrigerator, 7, 27... Current lead, 8, 28... Current lead normal temperature terminal, 9...
Recovery piping, 10... Circulation pump, 11... Condensing refrigerator. 10 Circulation pump Figure 1 8 Current lead
Claims (1)
リードを冷却した寒剤が気化したガスを回収し再凝縮す
る回収再凝縮装置を備えたことを特徴とする超電導磁石
装置。(1) A superconducting magnet device equipped with a refrigerator, characterized in that the superconducting magnet device is equipped with a recovery and recondensation device that recovers and recondenses gas vaporized by a cryogen that cools a current lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1356190A JPH03219604A (en) | 1990-01-25 | 1990-01-25 | Superconducting magnet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1356190A JPH03219604A (en) | 1990-01-25 | 1990-01-25 | Superconducting magnet device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03219604A true JPH03219604A (en) | 1991-09-27 |
Family
ID=11836589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1356190A Pending JPH03219604A (en) | 1990-01-25 | 1990-01-25 | Superconducting magnet device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03219604A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5959062B2 (en) * | 2010-10-14 | 2016-08-02 | 学校法人中部大学 | Current lead device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58201384A (en) * | 1982-05-19 | 1983-11-24 | Mitsubishi Electric Corp | Superconductive device |
| JPS59222905A (en) * | 1983-06-01 | 1984-12-14 | Mitsubishi Electric Corp | Current lead for superconductive coil |
| JPS6486506A (en) * | 1987-09-28 | 1989-03-31 | Kobe Steel Ltd | Method of cooling superconducting magnet |
-
1990
- 1990-01-25 JP JP1356190A patent/JPH03219604A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58201384A (en) * | 1982-05-19 | 1983-11-24 | Mitsubishi Electric Corp | Superconductive device |
| JPS59222905A (en) * | 1983-06-01 | 1984-12-14 | Mitsubishi Electric Corp | Current lead for superconductive coil |
| JPS6486506A (en) * | 1987-09-28 | 1989-03-31 | Kobe Steel Ltd | Method of cooling superconducting magnet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5959062B2 (en) * | 2010-10-14 | 2016-08-02 | 学校法人中部大学 | Current lead device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7260941B2 (en) | Superconductor device having superconductive magnet and refrigeration unit | |
| EP3523582B1 (en) | Passive flow direction biasing of cryogenic thermosiphon | |
| US6415613B1 (en) | Cryogenic cooling system with cooldown and normal modes of operation | |
| US20050229609A1 (en) | Cooling apparatus | |
| WO2000039513A1 (en) | Liquid helium recondensation device and transfer line used therefor | |
| JPH08279412A (en) | Helium-cooled superconducting magnet assembly | |
| JPH08222429A (en) | Cryogenic device | |
| JPH11248326A (en) | Chiller | |
| JP2013008975A (en) | Superconducting magnet systems | |
| JPH11118349A (en) | Helium gas condensing and liquefying device | |
| JPH1026427A (en) | Cooler | |
| JPH03219604A (en) | Superconducting magnet device | |
| JP2004222494A (en) | Vacuum holding method and superconducting machine with vacuum holding | |
| EP3182036B1 (en) | Method of accelerating cool down | |
| JPH09113052A (en) | Refrigeration equipment | |
| JPS60178260A (en) | Cryogenic refrigerator | |
| JPH05335636A (en) | Superconducting magnet device | |
| RU2011129C1 (en) | Magnetic suspension vehicle cryostat | |
| JPS6349887B2 (en) | ||
| JPH09106906A (en) | Conduction cooled superconducting magnet | |
| JPS61116250A (en) | Superconducting device and its cooling method | |
| JPS59222976A (en) | cryogenic cooling equipment | |
| JPS5951155B2 (en) | superconducting device | |
| JP2004205156A (en) | Method of cooling object to be cooled using heat pipe and its device | |
| JP2018505373A (en) | Closed cycle cryogen recirculation system and method |