title: In-line Bragg magnifier based on V-shaped germanium crystals.
abstract: In this work an X-ray imaging system based on a recently developed in-line two-dimensional Bragg magnifier composed of two monolithic V-shaped crystals made of dislocation-free germanium is presented. The channel-cut crystals were used in one-dimensional and in two-dimensional (crossed) configurations in imaging applications and allowed measurement of phase-contrast radiograms both in the edge-enhanced and in the holographic regimes. The measurement of the phase gradient in two orthogonal directions is demonstrated. The effective pixel size attained was 0.17 µm in the one-dimensional configuration and 0.5 µm in the two-dimensional setting, offering a twofold improvement in spatial resolution over devices based on silicon. These results show the potential for applying Bragg magnifiers to imaging soft matter at high resolution with reduced dose owing to the higher efficiency of Ge compared with Si.
authors.affiliation: ANKA Light Source, Karlsruhe Institute of Technology, Karlsruhe, Germany. patrik.vagovic@kit.edu
authors.forename: Patrik
authors.initials: P
authors.lastname: Vagovič
authors.forename: Dušan
authors.initials: D
authors.lastname: Korytár
authors.forename: Petr
authors.initials: P
authors.lastname: Mikulík
authors.forename: Angelica
authors.initials: A
authors.lastname: Cecilia
authors.forename: Claudio
authors.initials: C
authors.lastname: Ferrari
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Daniel
authors.initials: D
authors.lastname: Hänschke
authors.forename: Elias
authors.initials: E
authors.lastname: Hamann
authors.forename: Daniele
authors.initials: D
authors.lastname: Pelliccia
authors.forename: Tamzin A
authors.initials: TA
authors.lastname: Lafford
authors.forename: Michael
authors.initials: M
authors.lastname: Fiederle
authors.forename: Tilo
authors.initials: T
authors.lastname: Baumbach