09 بهمن 1401
تقي محسن پور

تقی محسن پور

مرتبه علمی: دانشیار
نشانی: گروه فیزیک دانشگاه مازندران
تحصیلات: دکترای تخصصی / فیزیک پلاسما
تلفن: 01135302480
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان Dispersion relation and growth rate in a free-electron laser with a background plasma
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Dispersion relation - growth rate - free-electron laser - background plasma
مجله JOURNAL OF PLASMA PHYSICS
شناسه DOI
پژوهشگران تقی محسن پور (نفر اول) ، بهروز مراغه چی (نفر دوم)

چکیده

The method of perturbation has been applied to derive a general dispersion relation for a free-electron laser (FEL) with background plasma and helical wiggler in the presence of an axial magnetic field. This dispersion relation is solved numerically to find unstable interactions among all of the wave modes. umerical calculations show that new coupling between the left wave and positive-energy space-charge of electron beam are found when wiggler induced velocity is large. This coupling does not change with increasing the plasma density. The growth rate of FEL is changed with increasing the plasma density and the normalized axial magnetic field.