부산대학교 도서관

In this paper, we present a simulation study on the generation of rotating gas in a cylindrical chamber, which contains weakly ionized gas with charge to neutral density ratio ( 10 − 6 − 10 − 3 ). In this chamber, a radial current component of current density, J r , is driven by an external electric potential difference between the inner and the outer radial boundaries, and a static magnetic field B 0 is imposed in the axial direction. The charged particles are accelerated in the azimuthal direction by the Lorentz force J r × B 0 . The neutrals then gain an azimuthal acceleration through ion–neutral collisions. The centrifugal force increases as the azimuthal speed increases. In the simulation, a strong centrifugal acceleration of 10 11 m / s 2 is achieved with an azimuthal speed of 10 5 m / s . A density gradient is developed to balance the centrifugal force, and the density at the outer radial boundary can reach 10 25 − 10 26 m − 3 . [ABSTRACT FROM AUTHOR]