JPH0338100A - Magnetic shield device - Google Patents
Magnetic shield deviceInfo
- Publication number
- JPH0338100A JPH0338100A JP17379089A JP17379089A JPH0338100A JP H0338100 A JPH0338100 A JP H0338100A JP 17379089 A JP17379089 A JP 17379089A JP 17379089 A JP17379089 A JP 17379089A JP H0338100 A JPH0338100 A JP H0338100A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- walls
- magnetic
- gap
- substrates
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000003302 ferromagnetic material Substances 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract 2
- 239000002826 coolant Substances 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 description 9
- 210000004556 brain Anatomy 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 5
- 229910000889 permalloy Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、磁気シールド装置、特に＋ ＳＱυＩＤ（
超電導量子干渉デバイス）を利用した医療機器に使用さ
れる磁気シールド装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a magnetic shielding device, especially +SQυID (
The present invention relates to a magnetic shielding device used in medical equipment using a superconducting quantum interference device (superconducting quantum interference device).
［従来の技術］
例えば、脳磁針は、 ＳＱυＩＤを利用して、脳から放
射される微弱な磁場の変化を検出し、これによって、脳
診断を行うものである。[Prior Art] For example, a magnetic brain needle uses SQυID to detect changes in a weak magnetic field emitted from the brain, thereby performing brain diagnosis.
脳磁針によって脳診断を行うときに特に問題となるのは
、外部磁気である。脳磁の強さは、１０−１４テラスの
オーダーであるので１例えば、地磁気の強さは、１０−
５テラスのオーダーであって、外部磁気が脳磁針に侵入
すると、正確な診断が行えない。External magnetism is a particular problem when performing brain diagnosis using a magnetic needle. The strength of brain magnetism is on the order of 10-14 terraces, so for example, the strength of the earth's magnetic field is 10-14.
On the order of 5 terraces, if external magnetism enters the magnetic needle, accurate diagnosis cannot be made.
従って、従来、外部磁気を遮へいするために、パーマロ
イ等の強磁性体により構成される磁気シールドが施こさ
れた室内で診断が行われていた。Therefore, conventionally, diagnosis has been performed in a room equipped with a magnetic shield made of ferromagnetic material such as permalloy in order to shield from external magnetism.
［発明が解決しようとする課題］
ところが、強磁性体のみによる磁気シールドでは、強磁
場のシールドには、有効であるものの磁場強さを１０４
テラスのオーダーに減衰するのが限度であり、完全に磁
気を遮へいすることができず、しかも、強磁性体は重量
が大きいので、設置が困難である。[Problem to be solved by the invention] However, although magnetic shielding using only ferromagnetic materials is effective in shielding strong magnetic fields, the magnetic field strength is reduced to 104
The attenuation is limited to the order of terraces, making it impossible to completely shield magnetism.Furthermore, ferromagnetic materials are heavy, making installation difficult.
従って、この発明の目的は、外部磁気を完全に遮へいす
ることができ且つ軽量な磁気シールド装置を提供するこ
とにある。Therefore, an object of the present invention is to provide a lightweight magnetic shielding device that can completely shield external magnetism.
［課題を解決するための手段］
この発明は、内部に空気が循環可能な密ぺい容器と、前
記容器に接続される真空ポンプおよび冷凍機とからなり
、前記容器は、非磁性体製内壁と、前記内壁と間隔をあ
けて設けられた強磁性体製外壁と、前記内壁と前記外壁
との間に間隔をあけて設けられた第１および第２中間壁
とからなり、前記第１および第２中間壁のそれぞれは、
銅製基板と前記基板上に形成された超電導皮膜とからな
り、前記内壁と前記第１中間壁との間隙および前記第２
中間壁と前記外壁との間隙は、前記真空ポンプによって
真空に維持され、そして、前記第１中間壁と前記第２中
間壁との間隙は、前記冷凍機からの冷媒によって満たさ
れていることに特徴を有するものである。[Means for Solving the Problems] The present invention includes a sealed container in which air can be circulated, a vacuum pump and a refrigerator connected to the container, and the container has an inner wall made of a non-magnetic material. , an outer wall made of a ferromagnetic material provided at a distance from the inner wall, and first and second intermediate walls provided at a distance between the inner wall and the outer wall; Each of the two intermediate walls is
It consists of a copper substrate and a superconducting film formed on the substrate, and includes a gap between the inner wall and the first intermediate wall and a superconducting film formed on the substrate.
The gap between the intermediate wall and the outer wall is maintained in a vacuum by the vacuum pump, and the gap between the first intermediate wall and the second intermediate wall is filled with refrigerant from the refrigerator. It has characteristics.
次に、この発明の磁気シールド装置の一実施態。Next, an embodiment of the magnetic shielding device of the present invention.
様を１図面を参照しながら説明する。The method will be explained with reference to one drawing.
第１図は、この発明の磁気シールド装置の一実施態様を
示す正面図、第２図は、第１図の部分拡大断面図である
。FIG. 1 is a front view showing one embodiment of the magnetic shielding device of the present invention, and FIG. 2 is a partially enlarged sectional view of FIG. 1.
第１図および第２図に示すように、この発明の磁気シー
ルド装置は、空気ポンプ１から内部に空気が循環可能な
密ぺい容器２と、容器２に接続された真空ポンプおよび
冷凍機４とからなっている。As shown in FIGS. 1 and 2, the magnetic shielding device of the present invention includes a sealed container 2 into which air can be circulated from an air pump 1, a vacuum pump and a refrigerator 4 connected to the container 2. It consists of
上記容器２は、第２図に示すように、残留磁気を避ける
ためにアルミニウム等の非磁性体製の内壁５と、内壁５
と間隔をあけて設けられたパーマロイ等の強磁性体から
なる外壁６と、内壁５と外壁６との間に間隔をあけて設
けられた第１および第２中間壁７Ａ、 ７Ｂとからなっ
ている。上記各壁５．６，７Ａおよび７Ｂは、 ＦＲＰ
等の支持材８によって固定されている。As shown in FIG. 2, the container 2 has an inner wall 5 made of a non-magnetic material such as aluminum to avoid residual magnetism, and
It consists of an outer wall 6 made of a ferromagnetic material such as permalloy and spaced apart from each other, and first and second intermediate walls 7A and 7B spaced apart between the inner wall 5 and the outer wall 6. There is. Each of the above walls 5.6, 7A and 7B is made of FRP
It is fixed by a supporting member 8 such as.
上記第１および第２中間壁７Ａ、７Ｂのそれぞれは、銅
製基板９と、基板９上に形成されたＹ−Ｂａ−Ｃｕ−０
系超電導酸化物の超電導皮膜１０とからなっている。皮
膜１０は、基板９上にプラズマ溶射等により、超電導粉
体を付着させることによって形成される。この場合、超
電導皮膜１０と基板９とが化学反応を起して、良好な超
電導特性が得られないことがあるが、これを防止するた
めに。Each of the first and second intermediate walls 7A and 7B includes a copper substrate 9 and a Y-Ba-Cu-0 formed on the substrate 9.
It consists of a superconducting film 10 of a superconducting oxide. The film 10 is formed by depositing superconducting powder onto the substrate 9 by plasma spraying or the like. In this case, a chemical reaction may occur between the superconducting film 10 and the substrate 9, and good superconducting properties may not be obtained, but this is to be prevented.
第３図に示すように、基板９上に銀製の中間膜１１を介
して超電導皮膜１１を形成すると良い。As shown in FIG. 3, it is preferable to form a superconducting film 11 on a substrate 9 with a silver intermediate film 11 interposed therebetween.
上記真空ポンプ３は、内壁５と第１中間壁７Ａとの間隙
および第２中間壁７Ｂと外壁６との間隙に接続され、こ
の間隙を真空に維持して、断熱効果を高めている。The vacuum pump 3 is connected to the gap between the inner wall 5 and the first intermediate wall 7A and the gap between the second intermediate wall 7B and the outer wall 6, and maintains the gap in a vacuum to enhance the heat insulation effect.
上記冷凍機４は、第１中間壁７＾と第２中間壁７Ｂとの
間隙に接続され、この間隙内に液体ヘリウム等の冷媒を
供給する。The refrigerator 4 is connected to the gap between the first intermediate wall 7^ and the second intermediate wall 7B, and supplies a refrigerant such as liquid helium into this gap.
このように構成されている。この発明の磁気シールド装
置によれば、外壁６によって、地磁気以上の磁場を１０
−”テラス程度に減衰し、さらに、マイスナー効果を有
する第１および第２中間壁７Ａ。It is configured like this. According to the magnetic shielding device of the present invention, the outer wall 6 can block a magnetic field of 10
- The first and second intermediate walls 7A are attenuated to the extent of terraces and further have a Meissner effect.
７Ｂの作用によって、外部磁気は完全にシールドされる
。・従って、第１図に示すように、容器２内の被験者１
２は、外部磁気に影響されることなく。Due to the action of 7B, external magnetism is completely shielded.・Therefore, as shown in FIG.
2 is not affected by external magnetism.
脳磁針１３等によって診断される。Diagnosis is made using magnetic needle 13, etc.
［発明の効果］
以上説明したように、この発明によれば、外部磁界を完
全に遮へいすることができ且つ軽量であるので運搬や設
置が容易に行えるといったきわめて有用な効果がもたら
される。[Effects of the Invention] As described above, the present invention provides extremely useful effects such as being able to completely shield external magnetic fields and being lightweight, making it easy to transport and install.
第１図は、この発明の磁気シールド装置の−実施態様を
示す正面図、第２図および第３図は。
１図の部分拡大断面図である。図面において、１・・・
空気ポンプ、 ２・・・容器。
３・・・真空ポンプ、 ４・・・冷凍機、５・・・
内壁、 ６・・・外壁、７Ａ・・・第１中間
壁、 ７Ｂ・・・第２中間壁、８・・・支持材、
９・・・基板、１０・・・超電導皮膜、
１１・・・中間膜、１２・・・被験者、 １３
・・・脳磁針。
第FIG. 1 is a front view showing an embodiment of the magnetic shielding device of the present invention, and FIGS. 2 and 3 are views. FIG. 1 is a partially enlarged sectional view of FIG. In the drawing, 1...
Air pump, 2... container. 3... Vacuum pump, 4... Freezer, 5...
Inner wall, 6... Outer wall, 7A... First intermediate wall, 7B... Second intermediate wall, 8... Supporting material,
9... Substrate, 10... Superconducting film,
11... Intermediate film, 12... Subject, 13
...brain magnetic needle. No.
Claims (1)
接続される真空ポンプおよび冷凍機とからなり、前記容
器は、非磁性体製内壁と、前記内壁と間隔をあけて設け
られた強磁性体製外壁と、前記内壁と前記外壁との間に
間隔をあけて設けられた第１および第２中間壁とからな
り、前記第１および第２中間壁のそれぞれは、銅製基板
と前記基板上に形成された超電導皮膜とからなり、前記
内壁と前記第１中間壁との間隙および前記第２中間壁と
前記外壁との間隙は、前記真空ポンプによって真空に維
持され、そして、前記第１中間壁と前記第２中間壁との
間隙は、前記冷凍機からの冷媒によって満たされている
ことを特徴とする磁気シールド装置。 ２ 前記第１および第２中間壁のそれぞれは、銅製基板
と前記基板上に銀製中間膜を介して形成された超電導皮
膜からなっていることを特徴とする、請求項１記載の磁
気シールド装置。[Scope of Claims] 1. Consists of a sealed container in which air can be circulated, a vacuum pump and a refrigerator connected to the container, and the container has an inner wall made of a non-magnetic material and a space apart from the inner wall. It consists of an outer wall made of ferromagnetic material that is spaced apart, and first and second intermediate walls that are spaced apart between the inner wall and the outer wall, each of the first and second intermediate walls being , consisting of a copper substrate and a superconducting film formed on the substrate, and a gap between the inner wall and the first intermediate wall and a gap between the second intermediate wall and the outer wall are maintained in a vacuum by the vacuum pump. and a magnetic shielding device, wherein a gap between the first intermediate wall and the second intermediate wall is filled with refrigerant from the refrigerator. 2. The magnetic shielding device according to claim 1, wherein each of the first and second intermediate walls comprises a copper substrate and a superconducting film formed on the substrate via a silver intermediate film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17379089A JPH0338100A (en) | 1989-07-05 | 1989-07-05 | Magnetic shield device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17379089A JPH0338100A (en) | 1989-07-05 | 1989-07-05 | Magnetic shield device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0338100A true JPH0338100A (en) | 1991-02-19 |
Family
ID=15967203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17379089A Pending JPH0338100A (en) | 1989-07-05 | 1989-07-05 | Magnetic shield device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0338100A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03242134A (en) * | 1990-02-19 | 1991-10-29 | Mitsui Mining & Smelting Co Ltd | Magnetic shielding body for measuring living body magnetism |
| US6740776B2 (en) | 2001-07-16 | 2004-05-25 | Novartis Ag | Air oxidation of an aromatic aldehyde to an aromatic acid |
-
1989
- 1989-07-05 JP JP17379089A patent/JPH0338100A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03242134A (en) * | 1990-02-19 | 1991-10-29 | Mitsui Mining & Smelting Co Ltd | Magnetic shielding body for measuring living body magnetism |
| US6740776B2 (en) | 2001-07-16 | 2004-05-25 | Novartis Ag | Air oxidation of an aromatic aldehyde to an aromatic acid |
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