The Bohm criterion for a collisional plasma sheath in an oblique magnetic field
斜磁场中碰撞等离子体鞘层的玻姆判据

The Bohm criterion for a collisinal plasma sheath in an oblique magnetic field is investigated with a two-fluid model. It is shown that the upper and lower limits for the sheath criterion exist. And the range of the ion Mach number depends on the magnetic field and the incidence status of the ions.