| 摘要 |
A gyrotron device according to the present invention, having an electron gun for emitting an electron beam having an annular cross seciton, coils for applying a magnetic field to the electron beam emitted from the electron gun, a resonator for resonating the electron beam with microwaves and converting energy of the electron beam into microwaves, a collector for collecting the electron beam, a directional coupler for causing microwaves of a predetermined mode to pass, and a waveguide unit for guiding the microwaves from the directional coupler to an external portion.
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