Stimulated backward Raman scattering of circularly polarized electromagnetic waves in magnetized quantum plasmas

Propagation and stimulated backward Raman Scattering of circularly polarized electromagnetic waves from ultra-cold quantum magnetized plasma is investigated. The effect of the Bohm-de Broglie potential on propagation of the electrostatic waves and the effect of the spin magnetization current on propagation of the CPEM waves are investigated. Formulas for the growth rate of the scattered EM wave and the ES wave are derived and analyzed. It is found that the growth rate is decreased by increasing of the quantum parameter in the non-magnetized ultra-cold quantum plasma. In the presence of the static magnetic field, the growth rate of BRS instability is increased by increasing of the static magnetic field. Whereas, decreasing of the density of the cold quantum plasma leads to increasing of the growth rate. This study indicates that the interaction between increasing of the quantum effects and the static magnetic field is in the lower reaction of the growth rate when they are both present compared to their separate effects added together. In the presence of the quantum effects, a small increase in the static magnetic field causes an increase in growth rate, which indicates that the influence of the static magnetic field on growth rate dominates over the quantum effects.