پديد آورنده :
كريمي، حسين
عنوان :
اثرات نسبيتي مراتب بالا در پراكندگي رامان القايي دربرهم كنش هاي ليزر-پلاسما
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده فيزيك
صفحه شمار :
دوازده،125ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
اكبر پروازيان
استاد مشاور :
ظفرا... كلانتري
تاريخ نمايه سازي :
6/12/92
استاد داور :
محمدحسن علامت ساز، احمد شيراني
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
016 The High Order Relativistic Effects in Stimulating Raman Scattering in Laser Plasma Intractions Hossein Karimi Hossein karimi@ph iut ac ir karimi1860@gmail com January 8 2014 Department of Physics Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor A Parvaziyan parvazin@cc iut ac irAbstractThe stimulated Raman scattering SRS is one of the parametric instabilities which is developed in theunderdense region below quarter critical density of laser produced plasmas SRS can be simplycharacterized as a decay of incident pumping electromagnetic wave in another electromagnetic wave andin a fast forward going electrostatic Langmuir wave Very well known feature of large amplitudeelectrostatic waves propagating through a plasma is the trapping and the accelerating electrons Discovery of the wave acceleration has led to an intense study of this phenomenon mainly in the contextof laser fusion experiments in the recent years For investigating the Stimulating Raman Scattering SRS we simulate this process for the plasmasituation that is available in the spherical tokamaks For this purpose We use the XOOPIC code that is aprogram used to simulate the laser plasma interactions Then the time evolution of the electrondistribution function and the energy transferred to the plasma is obtained In the next step We study nonlinear temporal evolution of SRS process in presence of combined effectsof relativistic and ponderomotive nonlinearities taking into account the coupling between pump scattered and plasma waves in completely ionized plasma The plasma is considered to be cold and it isassumed that electron thermal velocity is small compared to their quiver velocity under the influence ofthe laser field For this porpuse we introduce the basic equations that govern the dynamics of SRS process Then weuse mode coupled equations for three wave process under present approach and then use it to obtainseparate set of equations describing nonlinear time dependent evolution of amplitudes and phases of thepump scattered and plasma waves In the last step We study and discuss numerically the nonlinearcoupled evolution of SRS process in some special circumstances
استاد راهنما :
اكبر پروازيان
استاد مشاور :
ظفرا... كلانتري
استاد داور :
محمدحسن علامت ساز، احمد شيراني
