  We conjecture that for a plasma in a spatial domain with a boundary, the
specular reflection effect of the boundary can be approximated by a large
magnetic confinement field in the near-boundary region. In this paper, we
verify this conjecture for the 1.5D relativistic Vlasov-Maxwell system (RVM) on
a bounded domain $\Omega = (0, 1)$ with an external confining magnetic field.
