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1. 发明授权

US4994706A Field free, directly heated lanthanum boride cathode 失效
标题翻译：无场，直接加热硼化镧阴极
公开(公告)号：US4994706A
公开(公告)日：1991-02-19
申请号：US10053
申请日：1987-02-02
申请人： Ka-Ngo Leung , David Moussa , Stephen B. Wilde
发明人： Ka-Ngo Leung , David Moussa , Stephen B. Wilde
IPC分类号： H01J1/15
CPC分类号： H01J1/15
摘要： A directly heated cylindrical lanthanum boride cathode assembly is disclosed which minimizes generation of magnetic fields which would interfere with electron emission from the cathode. The cathode assembly comprises a lanthanum boride cylinder in electrical contact at one end with a central support shaft which functions as one electrode to carry current to the lanthanum boride cylinder and in electrical contact, at its opposite end with a second electrode which is coaxially position around the central support shaft so that magnetic fields generated by heater current flowing in one direction through the central support shaft are cancelled by an opposite magnetic field generated by current flowing through the lanthanum boride cylinder and the coaxial electrode in a direction opposite to the current flow in the central shaft.
摘要翻译：公开了一种直接加热的圆柱形硼化镧阴极组件，其最小化会干扰来自阴极的电子发射的磁场的产生。阴极组件包括一个在一端电接触的中心支撑轴的中心支撑轴，该中心支撑轴用作一个电极，以将电流传送到硼化镧硼化物圆柱体并且在其相对端与同时位于其周围的第二电极电接触中心支撑轴，使得由沿着一个方向流过中心支撑轴的加热器电流产生的磁场被电流流过硼化镧圆筒和同轴电极的电流产生的相反的磁场抵消，中心轴。

2. 发明授权

US4795940A Large area directly heated lanthanum hexaboride cathode structure having predetermined emission profile 失效
标题翻译：大面积直接加热六硼化镧阴极结构，具有预定的排放曲线
公开(公告)号：US4795940A
公开(公告)日：1989-01-03
申请号：US108327
申请日：1987-10-14
申请人： Ka-Ngo Leung , Keith C. Gordon , Dean O. Kippenham , Peter Purgalis , David Moussa , Malcom D. Williams , Stephen B. Wilde , Mark W. West
发明人： Ka-Ngo Leung , Keith C. Gordon , Dean O. Kippenham , Peter Purgalis , David Moussa , Malcom D. Williams , Stephen B. Wilde , Mark W. West
IPC分类号： H01J1/16 , H01J1/14 , H01J19/10
CPC分类号： H01J1/16
摘要： A large area directly heated lanthanum hexaboride (LaB.sub.6) cathode system (10) is disclosed. The system comprises a LaB.sub.6 cathode element (11) generally circular in shape about a central axis. The cathode element (11) has a head (21) with an upper substantially planar emission surface (23), and a lower downwardly and an intermediate body portion (26) which diminishes in cross-section from the head (21) towards the base (22) of the cathode element (11). A central rod (14) is connected to the base (22) of the cathode element (11) and extends along the central axis. Plural upstanding spring fingers (37) are urged against an outer peripheral contact surface (24) of the head end (21) to provide a mechanical and electrical connection to the cathode element (11).
摘要翻译：公开了大面积直接加热六硼化镧（LaB6）阴极系统（10）。该系统包括围绕中心轴线大致圆形的LaB6阴极元件（11）。阴极元件（11）具有头部（21），其具有上部基本上平面的发射表面（23），以及下部向下和中间主体部分（26），其从头部（21）朝基部（11）的阴极元件（22）。中心杆（14）连接到阴极元件（11）的底座（22）并且沿中心轴线延伸。多个直立的弹簧指（37）被推靠在头端（21）的外周接触表面（24）上以提供与阴极元件（11）的机械和电连接。

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