Realization of a Stable and Highly Efficient Gyrotron for Controlled Fusion Research

Abstract

The innovation of adding a beam prebunching section at the input to the cavity of a millimeter-wave gyrotron oscillator has yielded outstanding improvements in mode control and device efficiency. These results constitute a technological breakthrough which greatly improves prospects of developing gyrotrons with megawatt average power ratings as will be required for bulk heating of plasma in controlled thermonuclear reactors.