公开(公告)号：US3708772A

公开(公告)日：1973-01-02

申请号：US3708772D

申请日：1971-11-30

申请人： SIEMENS AG

发明人： LE FRANC G

IPC分类号： H01J37/141 ,  H01F7/00

CPC分类号： H01J37/1416 ,  Y10S505/871

摘要： A highly compact magnetic lens arrangement which economically provides the highest field strength on the axis with the minimum beam half width and a minimum outer field strength of the coil winding comprises two tubular shielding cylinder means of superconductive material coaxially aligned with the lens axis, said cylinder means each having a first end and a second end, said first ends being spaced from each other to define a unshielded lens gap therebetween, said lens gap having a coil means positioned about the cylinder means to create a magnetic field, a cooling agent adapted to be present about the cylinder which cause a concentration of the magnetic field adjacent the particle beam, and a ferromagnetic ring-shaped pole shoe on each of said first ends of said cylinders for regulating and guiding the magnetic field.

摘要翻译： 一种高度紧凑的磁透镜装置，其经济地在轴上提供最高的场强，具有最小的光束半宽度和线圈绕组的最小外场强度，包括两个与透镜轴同轴对准的超导材料的管状屏蔽筒装置，所述圆筒 每个具有第一端和第二端的装置，所述第一端彼此间隔开以限定其间的非屏蔽透镜间隙，所述透镜间隙具有围绕所述气缸装置定位的线圈装置以产生磁场，冷却剂适于 围绕气缸存在，其导致与粒子束相邻的磁场的浓度;以及在所述气缸的每个所述第一端上的铁磁环形极靴，用于调节和引导磁场。