OBLIQUELY PROPAGATING ION-ACOUSTIC NONLINEAR PERIODIC-WAVES IN A MAGNETIZED PLASMA WITH 2 ELECTRON SPECIES

Obliquely propagating ion-acoustic nonlinear periodic waves in a magne tized plasma consisting of warm adiabatic ions and two Maxwellian elec tron species are studied. Using the reductive perturbation method, the Korteweg-de Vries (KdV) equation is derived and its enoidal wave solu tion is discussed. It is found that as the amplitude of the enoidal wa ve increases, so does its frequency. The effects of variations in the density and temperature ratios of the two electron species, the ion te mperature, the angle of obliqueness and the magnetization on the chara cteristics of the enoidal wave are discussed in detail. When the coeff icient of the nonlinear term of the KdV equation, a1, vanishes, the mo dified Korteweg-de Vries equation is derived, and its periodic-wave so lutions are discussed in detail. In the limiting case these periodic-w ave solutions reduce to soliton or double-layer solutions.