title: Diffractive-refractive optics: (+,-,-,+) X-ray crystal monochromator with harmonics separation.
abstract: A new kind of two channel-cut crystals X-ray monochromator in dispersive (+,-,-,+) position which spatially separates harmonics is proposed. The diffracting surfaces are oriented so that the diffraction is inclined. Owing to refraction the diffracted beam is sagittally deviated. The deviation depends on wavelength and is much higher for the first harmonics than for higher harmonics. This leads to spatial harmonics separation. The idea is supported by ray-tracing simulation.
authors.affiliation: Institute of Physics, Academy of Sciences of the Czech Republic v.v.i., Na Slovance 2, CZ-18221 Praha 8, Czech Republic. hrdy@fzu.cz
authors.forename: Jaromír
authors.initials: J
authors.lastname: Hrdý
authors.forename: Petr
authors.initials: P
authors.lastname: Mikulík
authors.forename: Peter
authors.initials: P
authors.lastname: Oberta