In this article, we study the circular motion of particles and well-known Penrose mechanism around a Kerr-Newman-Kasuya black hole spacetime. The inner outer horizons, as well ergosurfaces said hole, are briefly examined under effect spin dyonic charge. Moreover, by limiting our exploration to equatorial plane, discuss characteristics geodesics investigate both photons, marginally stable orbits...

Abstract. In this article, we propose a model describing the transport of trapped particles in a surface potential. The potential confines particles close to the surface increasing the number of surface collisions. First, we consider the case of non charged particles. From a kinetic description, we rigorously derive a two dimensional Boltzmann equation. In the case of charged particles we intro...