title: Optimization of graded multilayer designs for astronomical X-ray telescopes.
abstract: We developed a systematic method for optimizing the design of depth-graded multilayers for astronomical hard-x-ray and soft-gamma-ray telescopes based on the instrument's bandpass and the field of view. We apply these methods to the design of the conical-approximation Wolter I optics employed by the balloon-borne High Energy Focusing Telescope, using W/Si as the multilayer materials. In addition, we present optimized performance calculations of mirrors, using other material pairs that are capable of extending performance to photon energies above the W K-absorption edge (69.5 keV), including Pt/C, Ni/C, Cu/Si, and Mo/Si.
authors.affiliation: Department of Physics, California Institute of Technology, MC 220-47, Pasadena, California 91125, USA. peterm@srl.caltech.edu
authors.forename: P H
authors.initials: PH
authors.lastname: Mao
authors.forename: F A
authors.initials: FA
authors.lastname: Harrison
authors.forename: D L
authors.initials: DL
authors.lastname: Windt
authors.forename: F E
authors.initials: FE
authors.lastname: Christensen