Ponderomotive potential and second harmonic backward Raman scattering in dense quantum plasmas

10th Asia Plasma and Fusion Association Conference

Singh Rathore, Nisha^1 ; Kumar, Punit^1

Department of Physics, University of Lucknow, Lucknow

226007, India^1

关键词: Dispersion relations;    External magnetic field;    Longitudinal velocity;    Phase matching conditions;    Ponderomotive forces;    Ponderomotive potential;    Quantum perturbation theory;    Raman backscattering;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/823/1/012027/pdf
DOI  :  10.1088/1742-6596/823/1/012027

来源: IOP

【 摘 要 】

A theoretical model for Raman backscattering of the second harmonic of an intense laser beam propagating through quantum plasma in presence of an external magnetic field using the quantum hydrodynamical (QHD) model is presented. The effects associated with the Fermi pressure, the Bohm potential and the electron spin have been taken into account. The ponderomotive force imparts a longitudinal velocity to the electrons and the electrostatic upper hybrid Langmuir wave is excited. The second-order quantum perturbation theory shows that the second harmonic of the ponderomotive potential arises under the phase matching condition. The dispersion relation for upper hybrid Langmuir wave has been setup.