Patent ID: 6127779
Filing Date: 2000-10-03
Classification: H01J

Abstract:
A high-power switching apparatus, comprising:a cathode having an emitting surface for emitting a hollow electron beam therefrom;an anode cavity spaced from said cathode, said cavity having an annular opening smaller in dimension than a corresponding internal dimension that defines said cavity to provide a Faraday cage collector of said hollow electron beam;a control electrode disposed between said cathode and said anode cavity in a non-intercepting position relative to said hollow electron beam, said control electrode further comprising a first electrode element disposed outside of said hollow electron beam and a second electrode element disposed inside of said hollow electron beam; andan intermediate high voltage electrode disposed between said control electrode and said anode cavity in a non-intercepting position relative to said hollow electron beam, said intermediate high voltage electrode further comprising a first intermediate high voltage electrode element disposed outside of said hollow electron beam and a second intermediate high voltage electrode element disposed inside of said hollow electron beam.