مشخصات پژوهش

عنوان	Instability of wave modes in a two-stream free-electron laser with a helical wiggler and an axial magnetic field
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Instability; wave modes; two-stream; free-electron laser; helical wiggler; axial magnetic field
چکیده	The dispersion relation of a two-stream free-electron laser (TSFEL) with a one-dimensional helical wiggler and an axial magnetic field is studied. Also, all relativistic effects on the space-charge wave and radiation are considered. This dispersion relation is solved numerically to find the unstable interaction among the all wave modes. Numerical calculations show that the growth rate is considerably enhanced in comparison with single-stream FEL. The effect of the velocity difference of the two electron beams on the two-stream instability and the FEL resonance is investigated. The maximum growth rate of FEL resonance is investigated numerically as a function of the axial magnetic field.
پژوهشگران	نرگس محرابی (نفر دوم)، تقی محسن پور (نفر اول)