1403/01/10
تقی محسن پور

تقی محسن پور

مرتبه علمی: دانشیار
ارکید:
تحصیلات: دکترای تخصصی
اسکاپوس:
دانشکده: دانشکده علوم پایه
نشانی:
تلفن: 01135302480

مشخصات پژوهش

عنوان
Dispersion relation and growth rate in a free-electron laser with a background plasma
نوع پژوهش
JournalPaper
کلیدواژه‌ها
Dispersion relation - growth rate - free-electron laser - background plasma
سال
2017
مجله JOURNAL OF PLASMA PHYSICS
شناسه DOI
پژوهشگران Taghi Mohsenpour ، behrouz Maraghechi

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.