Speaker
Punit Kumar
(Department of Physics)
Description
Interaction of high power laser fields with plasma is important for many applications including laser fusion, laser wakefield acceleration and x-ray lasers. At high laser intensities, nonlinear interactions between plasma and laser becomes significant. In the last ten years, there has been a great deal of interest on plasma systems where the quantum effects are important. Consideration of quantum effects in plasma is growing exponentially because of their relevance to wide range of applications. The importance of quantum plasma in fusion has already been explored. In the present paper, we focus on the recently developed quantum hydrodynamic (QHD) model. The nonlinear paraxial wave equation having linear and nonlinear source terms, which include contributions due to ponderomotive force, quantum effects and perturbations due to the presence of uniform magnetic field alongwith relativistic nonlinearities for quantum case and an envelope equation for laser radiation has been obtained using the source dependent expansion (SDE) technique. The evolution of the spot size is derived and the effect of density perturbations on the process of self-focussing is studied.
Co-authors
Nisha Singh Rathore
(Department of Physics, University of Lucknow, Lucknow, India)
Punit Kumar
(Department of Physics, University of Lucknow, Lucknow, India)
