Experimental demonstration of an electromagnetically pumped free-electron laser with a cyclotron-harmonic idler
Abstract
A three-wave, free-electron laser was operated with a powerful 8.4-GHz electromagnetic "pump"
wave replacing the usual magnetostatic wiggler. The presence of a uniform axial magnetic field Bo produced
cyclotron-harmonic "idler" waves. Peaks in the emission spectrum corresponding to cyclotron
harmonics were observed covering a frequency range from 16.5 to 130 GHz. The frequency spectrum of
this novel free-electron laser mechanism was tuned continuously by variation of Bo.