Abstract X-ray absorption spectroscopy using superconducting tunnel junction (STJ) detectors enables the analysis of nanostructures around trace light elements. In this study, an X-ray spectrometer using a 200-pixel STJ detector array was developed to increase the throughput. The magnetic shielding material was reconsidered to avoid magnetic fluxoid trapping in the superconducting film of the STJ. Approximately 90% of the pixels functioned as X-ray detectors simultaneously, and the energy resolution was 10.1 ± 0.9 eV on the N-K line. The throughput was twice that of the previously reported 100-pixel STJ detector array.
Shiki et al. (Tue,) studied this question.