Abstract: A high-energy telescope design is presented that combines grazing incidence geometry with Bragg reflection in a graded d-spacing multilayer coating to obtain significant sensitivity up to approximately 60 keV. The concept utilizes total reflection and first order Bragg reflection in a graded d-spacing multilayer structure in a way that higher energies are reflected from the deepest layers in the stack. The specific design presented in this paper is based on Ni/C and Mo/C structures with d-spacings ranging from 25 angstroms to 100 angstroms x-ray reflectivity data obtained with Cu K$alpha$-1$/ (8.05 keV) are presented from the first graded d-spacing structures of this kind. !8
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