Linear beam tube with reflected electron trap

Details Linear beam tube with reflected electron trap Linear beam tube with reflected electron trap

H - Electricity

01

J

353/25, 353/9

H01J 25/10 (2006.01) H01J 23/02 (2006.01) H01J 23/027 (2006.01) H01J 25/12 (2006.01) H01J 25/42 (2006.01)

Patent

CA 1224873

-14- Abstract Linear Beam Tube With Reflected Electron Trap Some electrons reflected from the collector of a klystron form a beam current flowing back toward the input end of the tube. This beam is modulated and can carry a regenerate signal which distorts the tube's performance when amplifying a television signal. The reflected electrons are removed by a spiralling transverse magnetic field having a pitch equal to the cyclotron wavelength in the axial magnetic field used to focus the beam. The rotative sense of the spiral is such that forward-going beam electrons are not affected but returning electrons are accelerated in their cyclotron orbits until they are driven outside the beam and are collected.

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