Gyrotron having a quasi-optical mode converter
AssigneeKabushiki Kaisha Toshiba
InventorYasuyuki Ito
Life of this patent
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Abstract
A gyrotron having a mode converter located in the path of a wave passing passage, the mode converter comprising a means for mode-converting electromagnetic wave into a radiating electromagnetic wave having an annular-shaped power distribution in a plane perpendicular to the direction in which the electromagnetic wave propagates, a ring-shaped mirror (annular mirror) for reflecting the radiating electromagnetic wave which has been converted by the mode converting means, and a waveguide tube having a kerf (i.e., a cutting portion of the tube) opposed to the annular mirror to receive the electromagnetic wave reflected by the annular mirror.
Claims14
A gyrotron including an electron gun for producing an electron beam which is injected into a resonator, said electron beam exciting said resonator to produce an electromagnetic wave, a waveguide coupled to said resonator and through which the electromagnetic wave produced in said resonator propagates, and a mode converter arranged in said waveguide, for converting an output wave mode (TE.sub.mn mode) of the electromagnetic wave into a radiated mode electromagnetic wave,
- said mode converter comprising:
- converting means for converting the electromagnetic wave into the radiated mode electromagnetic wave which has an annular-shaped power distribution in a sectional plane perpendicular to an axial direction in which the electromagnetic wave advances;
- annular mirror means having a circumferential inner surface for reflecting the radiated mode electromagnetic wave which have been converted by said converting means;
- and
- a waveguide tube section located at an end portion of said waveguide and having at an entrance of the waveguide tube section a kerf for receiving the radiated mode electromagnetic wave reflected by said annular mirror means, and said kerf located at a portion spaced apart from said annular mirror means.
A gyrotron comprising:
- an electron gun, a cavity resonator, and mode converting means for converting an electromagnetic wave mode, generated by gyration of an electron beam which is produced when the electron beam is emitted from the electron gun into the cavity resonator, into a radiated electromagnetic wave mode having an annular power distribution in a sectional plane perpendicular to an axial direction in which the electromagnetic wave mode propagates;
- annular mirror means for reflecting the radiated electromagnetic wave mode which has been converted by said mode converting means;
- and
- said mode converting means including a waveguide tube provided with a kerf which is located at a position spaced apart from said annular mirror means to receive the electromagnetic wave reflected by said annular mirror means.
Dependencies are inferred from the claim text.