Patent ID: 7385354
Filing Date: 2008-06-10
Classification: H01J

Abstract:
1. A multi-beam klystron apparatus comprising: an electron gun unit which generates electron beams from a plurality of points; an input unit which inputs radio-frequency power; a radio-frequency interaction unit which includes, from the electron gun unit side, an input cavity, a plurality of intermediate cavities and an output cavity, and amplifies the radio-frequency power input from the input unit to the input cavity by the interaction between the electron beams generated in the electron gun unit and a radio-frequency electric field; an output unit which outputs the radio-frequency power from the output cavity of the radio-frequency interaction unit; a collector unit which captures the electron beams passing through the radio-frequency interaction unit; and a focusing magnetic field unit which focuses the electron beams generated by the electron gun unit, the focusing magnetic field unit including: a main magnetic field generator arranged on the outside of the input cavity and the intermediate cavities of the radio-frequency interaction unit; an output-side magnetic field generator arranged on the outside of the output cavity of the radio-frequency interaction unit; an electron gun-side pole piece arranged between the radio-frequency interaction unit and the electron gun unit; a collector-side pole piece arranged between the radio-frequency interaction unit and the collector unit; and a radio-frequency interaction unit pole piece arranged between the output-side magnetic field generator and the main magnetic field generator.