抄録
Electrostatic drift waves driven by a Gaussian density profile in a sheet plasma of thickness of the order of the ion Larmor radius ρi have been studied numerically. The frequency range considered is less than the ion cyclotron frequency ωci. The method is based on an integral equation in wavenumber space derived from the Vlasov-Poisson system of equations and on the direct computation of the integral equation. Eigenfrequencies and eigenfunctions are studied systematically by varying the plasma thickness, the transverse wavenumber and the parallel wavenumber. Unique features for the case of the ideal sheet plasma, whose thickness is equal to ρi, are disclosed, whereas the usual drift waves have been found for the case when the plasma thickness is as large as 100ρi.
