FIRST OPERATION OF THE ISRAELI TANDEM ELECTROSTATIC ACCELERATOR FREE-ELECTRON LASER

Results of first operation of the Israeli Electrostatic-Accelerator Ta ndem Free-Electron Laser (EA-FEL) are reported. This EA-FEL utilizes a 1.4A electron beam obtained from a parallel how Pierce-type electron gun. The e-beam is transported into a resonator located inside a plana r Halbach configuration wiggler, which is at a potential of 1.4 MeV wi th respect to the cathode. A resonator utilizing two curved parallel p lates as a waveguide and two Talbot effect quasioptical reflectors (wa ve splitters) provides a quality factor Q approximate to 30000. Millim eter wave radiation pulses of 2 mu s duration were obtained at a frequ ency of 100.5 GHz, as predicted, at a power level above 1 kW. (C) 1998 Elsevier Science B.V. All rights reserved.