Observation of coherent millimeter and submillimeter emission from a microtron-driven Cherenkov free-electron laser

Abstract

We report the observation of coherent emission from a Cherenkov free-electron laser driven by a 5-MeV radio-frequency microtron. Power up to 50 W in pulses of 4-\ensuremath{\mu}s duration has been generated at the wavelengths of 1.6 and 0.9 mm using two different dielectric-loaded waveguides.