Taiwan Photon Source, X-ray Diffraction
First TPS Publication Marks a Milestone
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2017/01/19
The team led by Academian Shih-Lin Chang, NSRRC Emeritus Scholar Chair, has marked a significant milestone as the first publication using Taiwan Photon Source (TPS) was recently published in Optics Express. The experiments on “High-resolution interference-monochromator for hard X-rays” were carried out at the beamline TPS-09A of Temporally Coherent X-ray Diffraction. An X-ray interference-monochromator combining a Fabry-Perot resonator (FPR) and a double-crystal monochromator (DCM) employs the Si (12 4 0) as back reflection for 14.4388 keV X-rays and obtains single-mode X-rays with 3.45 meV energy resolution. The monochromator is based on the generation of cavity interference fringes from a FPR and single-mode selection of the transmission spectrum by a DCM of a nearly backward symmetric reflection geometry. The energy of the monochromator is tunable within 2500 meV(= ΔE) by temperature control of the FPR and the DCM crystals in the range of ΔT = 70 K at room temperature.
