公开(公告)号：US5306701A

公开(公告)日：1994-04-26

申请号：US662266

申请日：1991-02-28

申请人： Ulf E. Israelsson ,  Donald M. Strayer

发明人： Ulf E. Israelsson ,  Donald M. Strayer

IPC分类号： H01F6/06 ,  H01F7/22

CPC分类号： H01F6/06 ,  Y10T29/49014

摘要： A method of trapping a field in a block of superconductor material, includes providing (i) a block of material defining a bore, (ii) a high permeability core within the bore that defines a low reluctance path through the bore, (iii) a high permeability external structure on the exterior of the block of material that defines a low reluctance path between opposite ends of the core, and (iv) an electromagnet configured to apply a magnetic field around the high permeability core. The method proceeds by energizing the electromagnet to produce an applied magnetic field around the high permeability core, cooling the block of material sufficiently to render the block of material superconducting, de-energizing the electromagnet to result in a trapped magnetic field, and at least partially removing the low reluctance path defined by the core and the external structure in order to increase the magnetic flux density of the trapped magnetic field.

摘要翻译： 一种捕获超导体材料块中的场的方法包括提供（i）限定孔的材料块，（ii）孔内的高磁导率芯，其限定穿过该孔的低磁阻路径，（iii） 材料块外表面上的高磁导率外部结构，其限定了芯的相对端之间的低磁阻路径，以及（iv）电磁体，其配置为在高磁导率芯周围施加磁场。 该方法通过激励电磁体以在高磁导率芯周围产生施加的磁场，以充分冷却材料块以使材料块超导，使电磁体断电以导致被俘获的磁场，并且至少部分地 去除由芯和外部结构限定的低磁阻路径，以便增加被俘获磁场的磁通密度。

公开(公告)号：US5132279A

公开(公告)日：1992-07-21

申请号：US571299

申请日：1990-08-22

申请人： Ulf E. Israelsson ,  Donald M. Strayer

发明人： Ulf E. Israelsson ,  Donald M. Strayer

IPC分类号： G01R33/12

CPC分类号： G01R33/1246 ,  Y10S505/726 ,  Y10S505/727

摘要： A contact-less method for determining transport critical current density and flux penetration depth in bulk superconductor material. A compressor having a hollow interior and a plunger for selectively reducing the free space area for distribution of the magnetic flux therein are formed of superconductor material. Analytical relationships, based upon the critical state model, Maxwell's equations and geometrical relationships define transport critical current density and flux penetration depth in terms of the initial trapped magnetic flux density and the ratio between initial and final magnetic flux densities whereby data may be reliably determined by means of the simple test apparatus for evaluating the current density and flux penetration depth.

摘要翻译： 用于确定体超导体材料中的传输临界电流密度和通量穿透深度的无接触方法。 具有中空内部的压缩机和用于选择性地减小用于分配磁通量的自由空间区域的柱塞由超导体材料形成。 基于临界状态模型的分析关系，麦克斯韦方程和几何关系根据初始捕获的磁通密度和初始和最终磁通密度之间的比率确定了传输临界电流密度和通量穿透深度，从而数据可以可靠地由 用于评估电流密度和通量穿透深度的简单测试装置的手段。