X-ray emissivity profiles measured by the FSSR spectrometer in different cases. The curves obtained when both plasmas expand out of the targets are represented by the dashed black line and the full red line, respectively for the cases of absence or presence of the ambient medium. The gray curves with a pattern correspond to a single target case as a reference. In all cases, the magnetic field is present. All curves are normalized to the right target emissivity. The emissivity for the left target is the inverted right one with a multiplier taking into account the signal reduction due to the location of a part of the spectrometer in the shadow zone.