公开(公告)号：US20040106863A1

公开(公告)日：2004-06-03

申请号：US10704743

申请日：2003-11-12

申请人： Hitachi., Ltd.

发明人： Yusuke Seki ,  Daisuke Suzuki ,  Kuniomi Ogata ,  Keiji Tsukada

IPC分类号： A61B005/055 ,  G01R033/02

CPC分类号： A61B5/04005 ,  G01R33/025 ,  Y10S505/846

摘要： There is provided a magnetic shield which can shield external magnetic fields in the direction of an axis of a tubular magnetic shield and in the direction vertical to the axis. A magnetic shield has a cylindrical ferromagnetic substance 2-1 having openings on both ends and two superconducting loops housed in the respective insides of superconducting loop containers 1-1, 1-2. The superconducting loops are constructed of high critical temperature superconducting wire. The two superconducting loops have semicircle shapes and are arranged in x-direction so as to be symmetrical with respect to an axis of the cylindrical ferromagnetic substance 2-1. The superconducting loop containers 1-1, 1-2 are arranged in the insides near both open ends of the cylindrical ferromagnetic substance 2-1 with supports 20. The superconducting loops are arranged to be vertical to the axis of the cylindrical ferromagnetic substance 2-1. The superconducting loops are cooled by liquid nitrogen or a refrigerator. A lightweight, small magnetic shield having high openability can be realized.

摘要翻译： 提供了一种磁屏蔽件，其可以屏蔽外管磁导管的轴线方向和垂直于轴线的方向。 磁屏蔽具有在两端具有开口的圆柱形铁磁物质2-1和容纳在超导环容器1-1,1-2的各自内部的两个超导环。 超导环路由高临界温度超导线构成。 两个超导环具有半圆形并且沿x方向布置成相对于圆柱形铁磁性物质2-1的轴线对称。 超导回路容器1-1,1-2布置在带有支撑件20的圆柱形铁磁物质2-1的两个开口端附近的内部。超导环布置成垂直于圆柱形铁磁物质2- 1。 超导环通过液氮或冰箱冷却。 可以实现具有高开放性的重量轻的小型磁屏蔽。