Use of Asymmetric Dynamical Diffraction of X-rays for Multiple-Crystal Arrangements of the (n1, +n2)Setting

Abstract

Asymmetric dynamical diffractions of X-rays are successively used for multiple crystals arranged in the (n1 , +n2) setting. Double successive asymetric diffractions of the (n1 , +n2) arrangement give a beam of peculiar spread in angle and wavelength. Triple successive asymmetric diffractions of the (n, + n, - n) arrangement give a highly parallel and monochromatic beam for some appropriate combination of the asymmetry factors of the three crystals. Possible use of multiple asymmetric diffractions is discussed.