Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan.
RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
J Synchrotron Radiat. 2022 Sep 1;29(Pt 5):1265-1272. doi: 10.1107/S1600577522006610. Epub 2022 Jul 15.
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/BC 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 photons s mm (6.9 × 10 photons s mm) 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.
在这项研究中，设计、安装并评估了在 SPring-8 中长（215m）弯曲磁体光束线 BL20B2 上用于成像应用的产生高强度、高能、粉色 X 射线束的双层多层单色仪。两对 W/BC 多层镜分别设计用于利用光子能量为 110keV 和 40keV，带宽分别为 0.8%和 4.8%，与带宽小于 0.01%的 Si 双晶单色仪（DCM）相比，带宽大 100 多倍。在距离光源 210m 的实验小屋里，产生了尺寸为 14mm（V）×300mm（H）[21mm（V）×300mm（H）]的大而均匀的光束，在 110keV（40keV）时的通量密度为 1.6×10 光子 s mm（6.9×10 光子 s mm），与 Si 511（111）衍射的 DCM 相比，光子通量增加了 300（190）倍。高强度的粉色光束为化石、岩石、器官和电子设备等大型物体的先进 X 射线成像提供了便利，具有高速和高空间分辨率。
