Abstract
Two high-harmonic large-orbit gyrotron installations are under development in the Institute of Applied Physics. The pulsed gyrotron complex is based on a 80–100 keV/0.7– 1.0 A electron beam. We develop this gyrotron to achieve the output power level of several kW at frequencies up to 1 THz in order to satisfy requirements of some plasma applications. The 30 keV/0.7 A CW sub-THz large-orbit gyrotron represents a prototype of a source for DNP/NMR applications which is possible to operate at several different frequencies. We describe also a series of works aimed at creating high-harmonic gyrotrons with cavities of complicated shapes as a way to increase efficiencies of their operation and to improve their selective properties.
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