Title :
Spurious Modulation of Electron Beams
Author_Institution :
Bell Telephone Labs., Murray Hill, N.J.
Abstract :
This paper describes spurious modulation effects commonly observed in electron tubes employing high current electron beams. The modulation is caused by positive ions and secondary electrons moving in the beam. It is eliminated by pumping the tube to high vacuum and retarding or deflecting the secondary electrons.
Keywords :
Assembly; Electron beams; Electron tubes; Optical modulation; Oscillators; Packaging; Permanent magnets; Radio frequency; Space charge; Voltage;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1956.274851
