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    • 3. 发明专利
    • Electron gun
    • 电子枪
    • JP2003346671A
    • 2003-12-05
    • JP2002152592
    • 2002-05-27
    • Nec Micro Hakan Kkエヌイーシーマイクロ波管株式会社
    • CHIBA TORU
    • H01J3/02H01J3/38H01J23/06
    • H01J3/027H01J3/028H01J3/38H01J23/06
    • 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
    • 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