Proton radiography in background magnetic fields

Proton radiography has proved increasingly successful as a diagnostic for electric and magnetic fields in high energy density physics experiments. Most experiments use target-normal-sheath-acceleration sources with wide range the proton beam, velocity spread can help differentiate between provide time histories single shot. However, magnetised plasma strong background fields, broadband spectrum leads to velocity-spread-dependent displacement of beam significant blurring radiograph. We describe origins this show how it be removed from experimental measurement, we outline conditions under which such deconvolutions are successful. As an example, apply method experiment that used field 3 T. The reduced spatial resolution tens microns few millimetres. deconvolution procedure is applied showing accurate recovery radiographs resolutions better than 100 microns, enabling more estimates path integrated field. This work extends class particularly those external