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Double-multilayer monochromators for high-energy and large-field X-ray imaging applications with intense pink beams at SPring-8 BL20B2.
- Source :
-
Journal of Synchrotron Radiation . Sep2022, Vol. 29 Issue 5, p1265-1272. 8p. - Publication Year :
- 2022
-
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/B4C 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 × 109 photons s-1 mm-2 (6.9 × 1010 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09090495
- Volume :
- 29
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Synchrotron Radiation
- Publication Type :
- Academic Journal
- Accession number :
- 160194248
- Full Text :
- https://doi.org/10.1107/S1600577522006610