地磁场对彩色显像管的影响及减小方法  

The influence of geomagnetic field on kinescope and how to reduce it

作　　者：温佩琳[1] 管业鹏[1] 

机构地区：[1]中南大学资源环境与建筑工程学院,湖南长沙410083

出　　处：《中南工业大学学报》2000年第4期290-293,共4页Journal of Central South University of Technology(Natural Science)

基　　金：国家教育部博士点科研基金资助项目! ( ( 1 996) 1 3)

摘　　要：根据世界地磁图 ,计算了单个运动电子的全球受力分布 ,得出地磁场对彩色显像管具有不可忽视的影响 ;为减小地磁的影响 ,提出了一种有效的屏蔽措施 ,其屏蔽机理是利用铁磁材料的高磁导率对地磁场进行磁分路 .此外 ,就屏蔽效果与现有的屏蔽方式作了对比分析 .结果表明 ,采用该措施 ,地磁场影响明显减小 .The world magnetic force distribution of single moving electron is computed according to the world terrestrial magnetism map. It is pointed out that the influence of geomagnetic field on kinescope can not be ignored. A more effective shielding measure is suggested to reduce the influence of geomagnetic field, whose shielding principle is that magnetic route of geomagnetic field is separated by high permeability of ferromagnetic material. The shielding result of the new style is compared with that of the popular shielding style. The influence of geomagnetic field is obviously reduced after the new style is adopted. [

关 键 词：地磁场 屏蔽 光点偏移 着屏误差 彩色显像管 

分 类 号：TN141.32[电子电信—物理电子学] P318[天文地球—固体地球物理学]