17 بهمن 1401
سعيد ميرزانژاد

سعید میرزانژاد

مرتبه علمی: استاد
نشانی: مازندران-بابلسر-دانشگاه مازندران-دانشکده علوم پایه-گروه فیزیک اتمی و مولکولی-کد پستی 95447-47416
تحصیلات: دکترای تخصصی / فیزیک اتمی و مولکولی (برهمکنش لیزر-پلاسما)
تلفن: 09111126004
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان Investigation of self-focusing a Gaussian laser pulse in a weakly relativistic and ponderomotive regime inside a collisionless warm quantum plasma
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Quantum plasma, Spot-size, Ponderomotive, Relativistic, Self-focusing
مجله CHINESE JOURNAL OF PHYSICS
شناسه DOI https://doi.org/10.1016/j.cjph.2021.06.018
پژوهشگران داود اصغرنژاد (نفر اول) ، تقی محسن پور (نفر دوم) ، سعید میرزانژاد (نفر سوم)

چکیده

This article investigates nonlinear self-focusing of an intense right hand circularly polarized Gaussian profile laser pulse in a weakly relativistic and ponderomotive regime inside a collisionless and unmagnetized warm quantum plasma. The nonlinear propagation equation for laser pulse in plasma has been derived. Then, the evolution differential equation for laser spot-size was obtained with considering the parabolic equation approach under the Wentzel-Kramers-Brillouin and paraxial ray approximations. This differential equation was solved numerically by fourthorder Runge-Kutta method. It is shown that our solution confirms the results of the selffocusing of the laser pulse in a weakly relativistic ponderomotive regime in cold quantum plasma in extreme conditions. Numerical results indicate that self-focusing of the laser pulse in the presence of relativistic and ponderomotive nonlinearity inside warm quantum plasma is improved in comparison with relativistic and ponderomotive cold quantum plasma.