Plasma density map (r − ϕ plane) normalized to the fiducial injected plasma density, n₀. Top panel: black disk is the neutron star and the dashed circle shows the light cylinder located at R_LC = 3r_⋆. Radii are normalized to R_LC. The white solid lines and arrows show the magnetic field lines. Bottom panel: zoomed-in view on one current layer delimited by the red dashed line shown in the top panel. The layer has been unfolded to better observe the chain of plasmoids forming along the spiral.