Noise Transport in the Crossed-Field Diode
Abstract
The problem of excess noise in electron streams moving in mutually perpendicular electric and magnetic fields has been studied by many workers over the years. The present work treats the transport of noise, originating at a thermionic cathode, across a planar diode model of an accelerating crossed-field stream. Both rf open- and short-circuited diodes are studies. A single-velocity electronic theory and a multi-velocity Monte Carlo study are used to predict the growth of noise for magnetic fields up to a critical field, at which the stream has turned so as to graze the anode. The single-velocity theory is Van Duzer's extension of the familiar Llewellyn-Peterson equations to the crossed-field case. The Monte Carlo analysis essentially simulates actual thermionic emission by using random numbers to generate electron emission times and velocities. Trajectories for many charges are followed through the diode space, requiring the use of a high speed digital computer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 22, 1962
- Accession Number
- AD0409922
Entities
People
- M. A. Pollack
Organizations
- University of California, Berkeley