Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1985-12-12
1989-06-13
Moore, David K.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 5, 315 3, 315 541, 315 544, H01J 2500
Patent
active
048395617
ABSTRACT:
A gyrotron device including an electron gun for emitting a hollow electron beam, solenoid coils for generating magnetic fields so as to produce a cyclotron movement to the electron beam emitted from the electron gun, a plurality of ring mirrors arranged in the direction of the beam axis of the electron beam, and an optical resonator for resonating the electromagnetic waves produced when the electron beam is injected along the magnetic field lines. The optical resonator includes a slotted reflecting mirror so that a portion of the electromagnetic waves propagating within the resonator is reflected upstream to intersect and interact with the electron beam plural times. In order to maximize energy absorption by the electromagnetic waves, the solenoid coils are separately excited so as to shift the radius of the electron beam .lambda./4 within the resonator, .lambda. being the wavelength of electromagnetic waves. Inserted within at least one of the solenoid coils is a magnetic material having helically symmetrical grooves formed in the inner wall thereof in order to produce magnetic lines of force formed in a helix.
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Kabushiki Kaisha Toshiba
Moore David K.
Razavi Michael
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