Comparison of 1D PIC simulations for ﹩\sigma =3\times {10}^{-1}﹩ at two different resolutions: ﹩{\rm{\Delta }}x/(c/{\omega }_{\mathrm{pe}})=1/10﹩ (left) and ﹩{\rm{\Delta }}x/(c/{\omega }_{\mathrm{pe}})=1/40﹩ (right). Top to bottom: electron number density N_e, z component of the magnetic field B_z, x component of the electric field E_x, and phase-space plots in x−u_x and x−u_y at ﹩{\omega }_{\mathrm{pe}}t=500﹩, respectively.