  Application of an external kilo-tesla-level magnetic field, which can be
generated using high-intensity laser, to a target is a promising scheme to
reduce spray angle of a laser-driven relativistic electron beam (REB) for
enhancing the isochoric heating of a dense plasma with the laser-driven REB.
Here we have developed a two-dimensional electro-magnetic dynamics (2D-EMD)
simulation code to solve Maxwell equations with considerations of the inductive
heating and temperature-dependence of electrical conductivity of a material for
calculating temporally and spatially resolved two-dimensional profile of the
externally applied magnetic field in a gold-cone-attached target.
