Electron gun for multiple beam klystron using magnetic focusing
AssigneeCalabazas Creek Research, Inc.
InventorsR. Lawrence Ives, George Miram, Anatoly Krasnykh
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Abstract
An RF device comprising a plurality of drift tubes, each drift tube having a plurality of gaps defining resonant cavities, is immersed in an axial magnetic field. RF energy is introduced at an input RF port at one of these resonant cavities and collected at an output RF port at a different RF cavity. A plurality of electron beams passes through these drift tubes, and each electron beam has an individual magnetic shaping applied which enables confined beam transport through the drift tubes.
Claims45
A multiple beam RF device, said device comprising:
- a magnetic field enclosure having a central axis, a cylindrical body oriented along said central axis, a cathode end, and a collector end;
- a solenoidal field generator located within said magnetic field enclosure and generating a field substantially aligned with said central axis;
- said magnetic field enclosure cathode end and said magnetic field enclosure collector end each having n apertures;
- an RF circuit having a plurality said n of beam tunnels, each said beam tunnel having a beam tunnel axis, each said beam tunnel including drift tubes and gaps, said beam tunnel extending from said cathode end aperture to said collector end aperture, said cathode end aperture forming an anode;
- a plurality n of thermionic cathodes;
- a plurality said n of collectors;
- a magnetic field corrector external to said magnetic field enclosure and enclosing each said cathode.
A magnetic circuit for the guiding of a plurality n of parallel electron beams into a plurality n of electron beam tunnels, said magnetic circuit comprising:
- a cylindrical magnetic enclosure having a central axis, said enclosure including a cathode end cap and a collector end cap, said magnetic enclosure substantially surrounding said plurality n of electron beam tunnels;
- a plurality of electron guns, each said electron gun having a thermionic heater coupled to a cathode having a surface emitting electrons, each said cathode emitting surface positioned proximal to said cathode end cap of said electron beam tunnel, said end cap including an aperture for furnishing electrons into said beam tunnel;
- an RF circuit surrounding said beam tunnels;
- a magnetic field generator located inside said cylindrical magnetic enclosure for producing a magnetic field parallel to said central axis;
- a magnetic field corrector for modifying said magnetic field produced by said magnetic field generator such that said magnetic field is perpendicular to each said cathode electron emitting surface.
Dependencies are inferred from the claim text.