1.5 MeV ion-channel guided <i>x</i>-band free-electron laser amplifier

Abstract

Experiments on the ion-channel guided x-band free-electron laser amplifier generated peak microwave power exceeding 100 MW at 9.4 GHz with a gain of 21 dB/m. Saturation in the evolution curve has been achieved and a frequency spread of 0.9% was observed. The amplified microwave was separated from the driving beam line and extracted without breakdown.