EMW transformation in magnetoplasma with time varying plasma concentration

Summary form only given, as follows. The transformation of time-harmonic plane electromagnetic wave (EMW) propagating in a free space along the external constant magnetic field, in a plasma with time varying charged particle density was considered. The plasma was assumed to be two component, cold and loss-less with mobile electrons and uniformly positively charged ion background. The sum of ion and electron densities are assumed to be zero at any moment in time. Electron density N=N(t) is assumed to vary slowly in time with zero order initial velocities for the newly created electron-ion pairs and with zero velocities for the particles at the moment of recombination. Using this assumption it was possible to treat both rising as well as decaying time functions N(t). The electric and magnetic fields of EMW in plasma are derived using one and two dimensional electrostatic and electromagnetic numeric particle in cell simulation codes EST1, ELM1, and ELM2, developed for this purpose. The fields are derived and compared for various curve shapes (linear, quadratic, exponential) of electron density N=N(t) and are presented using suitable diagrams. The total energy of the electromagnetic fields in plasma is also derived and given at various times during the run of codes. The results derived in this paper are analysed and compared to results derived by other methods.