title: Efficiency calibrations of cylindrically bent transmission crystals in the 20 to 80 keV x-ray energy range.
abstract: Two quartz (10-11) crystals were cylindrically bent to a 25.4 cm radius of curvature and were mounted in identical Cauchois-type transmission spectrometers, and the crystal diffraction efficiencies were measured to 5% absolute accuracy using narrow bandwidth x-ray source fluences in the 20 to 80 keV energy range. The measured integrated reflectivity values were compared to calculations performed using a computational model that accounts for the diffraction geometry of the bent transmission crystal. These crystal calibrations enable the accurate measurement of absolute hard x-ray emission levels from laser-produced plasmas and other laboratory sources.
authors.affiliation: Artep Inc., 2922 Excelsior Springs Court, Ellicott City, Maryland 21042, USA.
authors.forename: Csilla I
authors.initials: CI
authors.lastname: Szabo
authors.forename: Uri
authors.initials: U
authors.lastname: Feldman
authors.forename: Stephen
authors.initials: S
authors.lastname: Seltzer
authors.forename: Lawrence T
authors.initials: LT
authors.lastname: Hudson
authors.forename: Michelle
authors.initials: M
authors.lastname: O'Brien
authors.forename: Hye-Sook
authors.initials: HS
authors.lastname: Park
authors.forename: John F
authors.initials: JF
authors.lastname: Seely
mesh_terms: D002138:Calibration; D017785:Photons; D011791:Quartz / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods*; D014965:X-Rays
chemical_list: D011791:Quartz