INFLUENCES OF THE ION TEMPERATURE ON THE NONLINEAR ELECTROSTATIC WAVES IN MAGNETIZED PLASMA

In this paper the influences of the ion temperature on the nonlinear lowfre-quency electrostatic waves in a magnetized low-β plasma are discussed.It is found that there exist three types of nonlinear waves under the parameter a T_i/T_e≠0 (where T_i and T_e are the ion and electron thermal energies respectively) : (i) nonlinear ion-cyclotron periodic waves with a wave speed ν_p>(1+α)^{(1/2).c_s (where c_s,is the ion acoustic velocity) (ii) ion-acoustic solitons with (1+α)(1/2)c_s.cosθp<(1+α)(1/2).c_s and (iii) nonlinear ion-acoustic periodic waves with v_p<(1+α)(1/2).c_s.cosθ (where θ is the angle between the wave vector and the magnetic field).Moreover,the maximum electric potential θ_m of the soliton decreases and the amplitudes of the electric potential for both nonlinear periodic waves are almost constant when the parameter a4 increases.}