公开(公告)号：JP2003346671A

公开(公告)日：2003-12-05

申请号：JP2002152592

申请日：2002-05-27

Applicant: Nec Micro Hakan Kk ,  エヌイーシーマイクロ波管株式会社

Inventor： CHIBA TORU

IPC: H01J3/02 ,  H01J3/38 ,  H01J23/06

CPC classification number: H01J3/027 ,  H01J3/028 ,  H01J3/38 ,  H01J23/06

Abstract: PROBLEM TO BE SOLVED: To provide a pierced electron gun which is made easy to assemble by reducing the number of parts while suppressing increase of consumed power and increase of perveance in a heater. SOLUTION: The electron gun equipped with a Wehnelt electrode for focusing an electron beam has a structure having a negative electrode emitting electrons, a heater cap having a built-in heater giving the negative electrode thermal energy for emitting the electrons, a retainer for fitting a peripheral edge of the negative electrode to the heater cap to provide and fix the negative electrode on to the heater cap, a Wehnelt electrode part formed in a shape that a mean angle of the surface conforms to a piercing angle, and a Wehnelt support, in which at least 3 heater cap supporting members for supporting and fixing the heater cap in such a manner that an electron emitting surface of the negative electrode and an opening provided in the Wehnelt electrode part are located at positions satisfying a prescribed perveance have been integrally formed. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种穿孔电子枪，其通过减少部件数量而容易组装，同时抑制消耗功率的增加和加热器中的增加。 解决方案：配备有用于聚焦电子束的Wehnelt电极的电子枪具有具有发射电子的负极的结构，具有内置加热器的加热器盖，其给出用于发射电子的负极热能，保持器 用于将负极的周边边缘装配到加热器盖上，以将负极提供并固定到加热器盖上，形成为表面平均角度符合穿透角的形状的Wehnelt电极部分和Wehnelt 支撑件，其中至少3个用于支撑和固定加热器帽的加热器盖支撑构件，使得负极的电子发射表面和设置在Wehnelt电极部分中的开口位于满足规定尺寸的位置 整体形成。 版权所有（C）2004，JPO