Bohm criterion for an electronegative magnetized plasma sheath
电负性等离子体磁鞘的玻姆判据

The Bohm criterion for an electronegative magnetized plasma sheath is investigated with a fluid model. It is shown that the existence of negative ions has an effect on the Bohm criterion. And the numerical value of the ion Mach number depends on the magnetic field and the incidence status of the ions.