地磁场对彩色显像管的影响及减小方法

来源期刊：中南大学学报(自然科学版)2000年第4期

论文作者：温佩琳 管业鹏

文章页码：290 - 293

关键词：地磁场;屏蔽;光点偏移;着屏误差

Key words：geomagnetic field; shield; deflection of optical point; misregister

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.

Abstract: The world magnetic force distribution of single moving electron is computed according to the world terrestrial magnetismmap. It is pointed out that the influence of geomagnetic field on kinescope can not be ignored. Amore 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.