NSRRC Activity Report 2022

Facility Development and Status 103 Introduction This article reports the commissioning results and user experimental status of the TPS 31A1 projection X-ray microscopy (PXM) station up to the end of 2022. The PXM can provide high-speed computed tomography, fast X-ray imaging, high throughput, and high-energy resolution experiments, as shown in Fig. 1 . The design of this system is described in NSRRC Activity Report 2021 1 and also in the additional reference papers. 2,3 This report focuses on the commissioning results and user experimental conditions of this year. Commissioning for the First Half of 2022 During the first half of 2022, the research team conducted trial runs of TPS 31A1 . The main task was to successfully introduce light into the experimental station. To accomplish this, the research team successfully tested the monochromator of the double multi-layer mirror (DMM) and double crystal (DCM). The test results were close to our expectations. The beam size at the experimental station is approximately 2 cm wide and 1 cm high. The output modes Preliminary Commissioning and User Experimental Results for the TPS 31A1 Micro CT Endstation of this trial run included a white-light mode and single-light modes such as DMM and DCM. The beam size changes with energy and, as the energy increases, the footprint of the beam passing through the spectrometer in the vertical direction will decrease as a result of a variety of factors such as the angle of incidence and reflectivity. After testing, the DMM mode was found to be able to output an X-ray beam of up to 50 keV and the DCM mode able to output an X-ray beam of up to approximately 36 keV. The research team also conducted testing of the white beam mode. The results revealed that the flux of the white light of this beamline is quite high, as was expected. Based on the design values, the estimated output of the white-light mode for the given output size should be approximately 500 W. However, because of the high heat, high radiation dose, and ozone generated by this mode, the experimental station’s shield room requires further protection. The construction team is currently working on improving this. Fig. 1 : Layout of the PXM and TXM endstations.