20 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 Electron sheath dynamic in the laser–foil interaction
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Electron backward acceleration; Electron blow out regime; Laser–foil interaction; Ponderomotive force
مجله LASER AND PARTICLE BEAMS
شناسه DOI 10.1017/S0263034616000331
پژوهشگران سعید میرزانژاد (نفر اول) ، جواد بابابی (نفر دوم) ، رشید نصرالله پور (نفر سوم)

چکیده

In the interaction of ultra-short and ultra-intense high contrast laser pulse with a dense foil, accelerating electron sheath is formed. The dynamic of this sheath is obtained according to the ponderomotive force of the laser pulse and restoring electrostatic force of the stationary heavy ions. In the transient dynamics, maximum electron sheath displacement is obtained for different interaction parameters. This maximum displacement has an important effect in the explanation of the electron blow out condition. It is shown numerically that the electron sheath maximum displacement increases with increasing laser pulse amplitude or decreasing its rise time, or by decreasing plasma electron density. Recently, backward MeV acceleration of electrons in the interaction of intense laser pulse with solid targets was observed. The ponderomotive force of the compressed reflected laser pulse includes in our formalism and is used for explanation of the electron’s backward acceleration. The threshold values of the interaction parameters for the occurrence of this phenomenon are considered. The electron blow out condition and backward acceleration are accompanied with numerical modeling and 1D3V, particle-in-cell simulation code.