Novel multilayer designs for future hard x-ray missions

Current multilayer designs for 10-80 keV hard X-ray telescope missions have focused primarily on the proven properties of W and Pt based multilayer coatings. Recently a number of new material combinations and coating capabilities have emerged which allows for more elaborate designs that can further extend the energy band of current mission designs as well as avoid some of the unwanted absorption edge effects in the effective area near potentially important line emission energies. These new design possibilities are investigated for current hard X-ray mission designs. The new material combinations to be considered are recently proven capabilities of enhanced NiV/C coatings and NiV/SiC coatings in conjuction with the well-established W based coatings.