Title :
Radiation fields of THz free electron laser: 3D EM simulation and experimental study
Author :
Kapilevich, Boris ; Lurie, Yuri ; Perutski, Boris ; Litvak, Boris ; Etinger, Ariel ; Friedman, Aharon ; Vashdi, Yehiel
Author_Institution :
Dept. of Electr. & Electron. Eng., Ariel Univ., Ariel, Israel
Abstract :
In this paper we present the results of 3D EM simulations and experimental verification of the configurations of EM field generated by radiating aperture of RF-LINAC THz FEL designed in Ariel University. The study is based on the FEL radiation pattern obtained in preliminary simulations by space-frequency WB3D numerical code. A wide-band radiation consisting mainly of a few lowest rectangular waveguide modes (TE01, TE21 and TE23 modes were found to be the dominant) is predicted at the FEL output. The optimal position of the focusing lens providing the minimum size of a beam without splitting was determined. The results of experiments are in a good agreement with numerical simulations.
Keywords :
free electron lasers; laser beams; laser modes; lenses; optical focusing; waveguide lasers; 3D EM simulation; RF-LINAC THz FEL; TE01 modes; TE21 modes; TE23 modes; THz free electron laser; focusing lens optimal position; radiating aperture; radiation fields; radiation pattern; rectangular waveguide modes; space-frequency WB3D numerical code; wide-band radiation; Antenna radiation patterns; Apertures; Focusing; Laser beams; Lenses; Three-dimensional displays; Transmission line measurements; THz FEL; beam profile; focusing lens; modes of radiating fields;
Conference_Titel :
Electrical & Electronics Engineers in Israel (IEEEI), 2014 IEEE 28th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4799-5987-7
DOI :
10.1109/EEEI.2014.7005861
