I. Introduction
There has been successful work using the Z-Beamlet [2], [3] laser to produce sources for imaging objects on ZR. The X-rays produced, with typical energies of tens of kiloelectronvolts [16], may be neither sufficiently energetic nor bright to image newer targets of interest, which could use high-density high-atomic-number () materials. The interaction of a high-intensity laser with a dense high- foil will preferentially produce bremsstrahlung X-rays with energies in the MeV range—sufficient to image the next generation of target objects [4], [5]. This form of interaction has the benefit of high temporal and spatial resolutions: typically a few times the incident laser pulse duration (picoseconds) and the approximate dimensions of the target foil (in tens to hundreds of ).