Electron tube device mounted with a cold cathode and a method of impressing voltages on electrodes of the electron tube device

摘要

Expressing a perveance of an electron gun to be determined by a form of the electron gun as Pmu, a voltage to be impressed on an accelerating electrode Va and a beam current Ib, voltage Va which satisfies the following expression,is impressed on the accelerating electrode.Further, the electric potential of the accelerating electrode is maintained at the highest level of all electrodes in the electron tube at all times.