title: An active-optic x-ray fluorescence analyzer with high energy resolution, large solid angle coverage, and a large tuning range.
abstract: A crystal-optic x-ray fluorescence energy analyzer has been designed and tested, which combines the features of electron-volt energy resolution, large solid angle coverage, and tunability over several kilo-electron-volts. The design is based upon the principle of active optics, with ten actuators available to optimally adjust the shape of a silicon crystal used in the Bragg geometry. In most applications the shape is that of a logarithmic spiral for high energy resolution with a spatially nonresolving detector, but a wide range of other shapes is also possible for applications such as imaging or single-shot spectroscopy in a spectral range of the operator's choosing.
authors.affiliation: Argonne National Laboratory, Argonne, Illinois 60439, USA. adams@aps.anl.gov
authors.forename: Bernhard W
authors.initials: BW
authors.lastname: Adams
authors.forename: Klaus
authors.initials: K
authors.lastname: Attenkofer