公开(公告)号：JP2006127899A

公开(公告)日：2006-05-18

申请号：JP2004314232

申请日：2004-10-28

Applicant: Nec Microwave Inc ,  Necマイクロ波管株式会社

Inventor： MUNEHIRO TAKATSUGU ,  CHIBA TORU

IPC: H01J23/06

CPC classification number: H01J23/065 ,  H01J3/024 ,  H01J2225/14

Abstract: PROBLEM TO BE SOLVED: To provide an electron gun with little individual difference due to variation in manufacture, and with good electron emission property.
SOLUTION: An electron gun is provided with a cathode pellet discharging electrons, a heater cap integrating a heater imparting heat energy for discharging electrons to the cathode pellet, a Wehnelt electrode for focusing an electron beam in which the average angle of a surface against the outermost shell of the electron beam is formed to be a shape matching a pierced angle, and a retainer installing and fixing the cathode pellet on the heater cap by restraining the periphery edge of the cathode pellet to the heater cap and a part covering the periphery edge of an electron discharging surface of the cathode pellet works as a part of the Wehnelt electrode.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供由于制造变化而具有很小的个体差异的电子枪，并且具有良好的电子发射性能。 解决方案：电子枪设有排出电子的阴极粒子，加热器帽集成了赋予阴极丸的电子放出热能的加热器，用于聚焦电子束的Wehnelt电极，其中表面的平均角 电子束的最外壳形成为与穿刺角相匹配的形状，保持器通过将阴极丸的周缘限制在加热器盖上而将阴极丸安装并固定在加热器帽上， 阴极颗粒的电子放电表面的外围边缘作为Wehnelt电极的一部分。 版权所有（C）2006，JPO＆NCIPI