Effective magnetron cathodes on the principle of the active substance transfer from an independent source on to the emitting surface through vacuum

A principally new approach is used to the design of the cathode units, which consists delivering of the active material to the emissive surface from the source, which separated from this surface by a vacuum gap (CVG). Choosing the range of operation temperature for a CVG spiral should rely on the following conception: the spiral temperature must be sufficient to heat the bushing to such temperature when the active material evaporation speed would be high enough to form an absorbed film on the surface of the spiral which would provide a required level of its electron emission.