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    • 7. 发明授权
    • Core magnetron and method of manufacturing permanent magnets therefor
with low gas emission
    • 核磁控管及其制造具有低气体排放的永久磁铁的方法
    • US4105913A
    • 1978-08-08
    • US707010
    • 1976-07-20
    • Masaru YamanoToshio Iemura
    • Masaru YamanoToshio Iemura
    • H01J23/10H01J25/587H01J25/50
    • H01J23/10H01J25/587
    • A core type magnetron comprising a vacuum envelope which includes an open ended magnetic anode cylindrical member and magnetic upper and lower end plates for closing the opposite end openings of the cylindrical member. Internal to the vacuum envelope, a plurality of anode vanes are provided which extend in a radial direction from the approximate middle of the inner wall of the cylindrical member toward the center of the envelope. A pair of permanent magnets provided internal to the envelope, each extending from opposite end plates toward the anode vanes. By this arrangement, an operating space is defined by the opposing surfaces of the pair of the magnets and the anode vanes, such that a magnetic flux is applied to said operating space. A cathode is provided within the operating space. The magnets employed are characterized as being low in the emission of gases during operation of the magnetron, since they are manufactured by a process which includes melting designated source materials mixed with a small amount of silicon in a vacuum, casting the melt in a vacuum, followed by forging.
    • 一种核心型磁控管,其包括真空外壳,其包括开放式磁性阳极圆柱形构件和用于封闭圆柱形构件的相对端部开口的磁性上下端板。 在真空外壳的内部,设置有多个阳极叶片,其从径向方向从圆柱形构件的内壁的大致中间朝向外壳的中心延伸。 一对永久磁铁设置在外壳的内部,每一个从相对的端板向阳极叶片延伸。 通过这种布置,操作空间由一对磁体和阳极叶片的相对表面限定,使得磁通量被施加到所述操作空间。 在操作空间内设置阴极。 所使用的磁体的特征在于在磁控管的操作期间气体的排放低,因为它们通过一种方法制造,该方法包括在真空中熔化指定的与少量硅混合的原料,在真空中浇铸熔体, 其次是锻造。