Noise in injected-beam crossed-field electron devices

The purpose of this paper is to present some theoretical and experimental results on noise transport in crossed-field devices which utilize Kino type electron guns. The noise characteristics of several types of guns are compared and the results contribute to a better understanding of the various problems associated with noise in injected-beam crossed-field devices. The Monte Carlo method is used to simulate random electron emission from the cathode in terms of so-called "big electrons." The big electrons are randomly generated at the cathode at prescribed times according to a Poisson distribution A half-Maxwellian distribution is assumed for the normal velocity component and a full-Maxwellian distribution for the tangential velocity component.