In:
Journal of Synchrotron Radiation, International Union of Crystallography (IUCr), Vol. 29, No. 5 ( 2022-09-01), p. 1265-1272
Abstract:
In this study, double-multilayer monochromators that generate intense, high-energy, pink X-ray beams are designed, installed and evaluated at the SPring-8 medium-length (215 m) bending-magnet beamline BL20B2 for imaging applications. Two pairs of W/B 4 C multilayer mirrors are designed to utilize photon energies of 110 keV and 40 keV with bandwidths of 0.8% and 4.8%, respectively, which are more than 100 times larger when compared with the Si double-crystal monochromator (DCM) with a bandwidth of less than 0.01%. At an experimental hutch located 210 m away from the source, a large and uniform beam of size 14 mm (V) × 300 mm (H) [21 mm (V) × 300 mm (H)] was generated with a high flux density of 1.6 × 10 9 photons s −1 mm −2 (6.9 × 10 10 photons s −1 mm −2 ) at 110 keV (40 keV), which marked a 300 (190) times increase in the photon flux when compared with a DCM with Si 511 (111) diffraction. The intense pink beams facilitate advanced X-ray imaging for large-sized objects such as fossils, rocks, organs and electronic devices with high speed and high spatial resolution.
Type of Medium:
Online Resource
ISSN:
1600-5775
DOI:
10.1107/S1600577522006610
Language:
Unknown
Publisher:
International Union of Crystallography (IUCr)
Publication Date:
2022
detail.hit.zdb_id:
2021413-3
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