Title :
Single-mode and multimode operation conditions in JINR-IAP millimeter-wave FEL-oscillator
Author :
Ginzburg, Naum S. ; Kaminsky, Alim K. ; Kaminsky, Alexander A. ; Peskov, Nikolai Yu ; Sedykh, Sergey N. ; Sergeev, Anatoly P. ; Sergeev, Alexander S.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
fDate :
6/1/1998 12:00:00 AM
Abstract :
The influence of the Q-factor of a two-mirror Bragg resonator on the efficiency and spectrum of radiation was studied both theoretically and experimentally for the JINR-IAP millimeter-wave free-electron laser (FEL)-oscillator driven by a linear induction accelerator (1 MeV/200 A/200 ns). In accordance with theoretical predictions, single-frequency operation in a low (optimal) Q-factor resonator and multifrequency operation in a high Q-factor resonator were observed. For an optimal resonator configuration at the frequency 31 GHz, single-mode generation with power of approximately 35 MW and efficiency of 26% was obtained. A significant drop in FEL efficiency was observed for multifrequency generation
Keywords :
Q-factor; beam handling equipment; electron accelerators; electron beams; free electron lasers; laser beams; laser cavity resonators; laser mirrors; laser modes; linear accelerators; millimetre wave lasers; millimetre wave oscillators; 1 MeV; 200 A; 200 ns; 26 percent; 31 GHz; 35 MW; FEL efficiency; JINR-IAP millimeter-wave FEL-oscillator; Q-factor; Q-factor resonator; efficiency; laser radiation; linear induction accelerator; millimeter-wave FEL-oscillator; multifrequency generation; multifrequency operation; multimode operation conditions; optimal resonator configuration; power; single-frequency operation; single-mode generation; single-mode operation conditions; spectrum; two-mirror Bragg resonator; Electron beams; Free electron lasers; Frequency; High power amplifiers; High power microwave generation; Laser theory; Magnetic field measurement; Masers; Radiofrequency amplifiers; Reflection;
Journal_Title :
Plasma Science, IEEE Transactions on
