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    Schottky emission cathode and a method of stabilizing the same
    1.
    发明公开
    Schottky emission cathode and a method of stabilizing the same 失效
    肖特基辐射和德法尔森

    公开(公告)号：EP0696043A1

    公开(公告)日：1996-02-07

    申请号：EP95112077.3

    申请日：1995-08-01

    申请人： HITACHI, LTD.

    发明人： Shinada, Hiroyuki ,  Kimura, Shingo ,  Kuroda, Katsuhiro ,  Fukuhara, Satoru ,  Ohshima, Takashi

    IPC分类号： H01J1/30

    CPC分类号： H01J1/304 ,  H01J2201/317 ,  H01J2237/06316

    摘要： A Schottky emission cathode has a filament, a needle-shaped piece of single crystal refractory metal which is attached to the filament and has a flat crystal surface at a tip thereof, and an adsorbed layer including at least one kind of a metal other than the single crystal refractory metal on the flat crystal surface.
    The piece of single crystal refractory metal is heated by passing a current through the filament and electrons are extracted by an electric field applied on a tip of the needle-shaped piece of single crystal refractory metal. The tip of the needle-shaped piece of single crystal refractory metal has a radius of curvature of a value to produce an energy width among electrons extracted from the tip not exceeding a predetermined value when the electric field is sufficient to prevent the flat crystal surface from collapsing during operation of the cathode.

    摘要翻译： 肖特基发射阴极具有长丝，单晶耐火金属针形片，其附着于灯丝，并且在其顶端具有平坦的晶体表面，以及包含至少一种不同于 单晶难熔金属在平面晶面上。 通过使电流通过灯丝来加热单晶难熔金属片，并通过施加在针状单晶耐火金属片的尖端上的电场来提取电子。 针状单晶耐火金属片的尖端具有一个值的曲率半径，以在电场足以防止平坦的晶体表面时产生从尖端提取的电子之间的能量宽度不超过预定值 在阴极运行期间塌陷。