公开(公告)号：US20160189914A1

公开(公告)日：2016-06-30

申请号：US14895708

申请日：2014-10-17

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Jiang HUANG ,  Mingwu FAN ,  Tiaoqin YU ,  Lige ZHANG ,  Chen ZUO ,  Jun YANG ,  Yongqian XIONG ,  Kaifeng LIU ,  Gerald F. WU ,  Lei CAO

IPC: H01J37/143

CPC classification number: H01J37/143 ,  G21K1/093 ,  G21K5/04 ,  H01J3/12 ,  H01J33/00 ,  H01J37/3178 ,  H01J2237/0835 ,  H01J2237/1405 ,  H01J2237/152

Abstract: Provided is a device for optimizing a diffusion section of an electron beam, comprising two groups of permanent magnets, a magnetic field formed by the four magnetic poles extending the electron beam in a longitudinal direction, and compressing the electron beam in a transverse direction, so that the electron beam becomes an approximate ellipse; another magnetic field formed by the eight magnetic poles optimizing an edge of a dispersed electron-beam bunch into an approximate rectangle; by controlling the four longitudinal connection mechanisms so that the upper magnetic yoke and the lower magnetic yoke of the first group of permanent magnets move synchronously towards the center thereof thereby longitudinally compressing the electron beam in the shape of an approximate ellipse, and the upper magnetic yoke and the lower magnetic yoke of the second group of permanent magnets move synchronously towards the center thereof thereby longitudinally compressing the electron beam in the shape of an approximate rectangle, and the process of longitudinal compression is repeated until a longitudinal size of the electron-beam bunch is reduced to 80 mm. The invention is capable of reasonably compressing a longitudinal size of an electron-beam bunch after diffusion to approximately 80 mm, which ensures optimum irradiation uniformity and efficiency, and enables the longitudinal size to be within the range of a conventional titanium window,

Abstract translation: 本发明提供一种用于优化电子束的扩散部分的装置，包括两组永久磁体，由四个磁极形成的磁场，该四个磁极沿纵向方向延伸电子束，并且沿横向压缩电子束，因此 电子束变成近似椭圆; 由八个磁极形成的另一个磁场将分散的电子束束的边缘优化成近似矩形; 通过控制四个纵向连接机构，使得第一组永磁体的上磁轭和下磁轭同步向其中心移动，从而纵向压缩近似椭圆形的电子束，并且上磁轭 并且第二组永磁体的下磁轭朝向其中心同步移动，从而纵向压缩大致矩形的电子束，并且重复纵向压缩的过程，直到电子束束的纵向尺寸 减至80毫米。 本发明能够将扩散后的电子束束的纵向尺寸合理地压缩至大约80mm，这确保了最佳的照射均匀性和效率，并且使纵向尺寸在常规的钛合金窗口的范围内，