Millimeter Microwave Emission from a Maser by use of Plasma-Produced Elecrons Orbiting a Positively Charged Wire

Abstract

Plasma-produced electrons have been trapped for long periods of time in orbits around a positively charged wire. Since the frequency of rotation of each electron increases if it loses kinetic energy and sinks into the positive-potential well, phase bunching resulting in intense microwave emission can be easily excited.