The Transition Edge Sensor is extremely sensitive to the change of temperature, combined with the high-Z metal of a certain thickness, it can realize the high energy resolution measurement of particles such as X-rays. X-rays with energies below 10 keV have very weak penetrating ability, so only a few microns thick of gold or bismuth can obtain quantum efficiency higher than 70\%. Therefore, the entire structure of the TES X-ray detector in this energy range can be realized in the microfabrication process. However, for X-rays or gamma rays from 10 keV to 200 keV, sub-millimeter absorber layers are required, which cannot be realized by microfabrication process. This paper first briefly introduces a set of TES X-ray detectors and their auxiliary systems built by ShanghaiTech University, then focus on the introduction of the TES γ-ray detector, with absorber based on an sub-millimeter lead-tin alloy sphere. The detector has a quantum efficiency above 70\% near 100 keV, and an energy resolution of about 161.5eV@59.5keV.
@article{arxiv.2204.00010,
title = {Transition edge sensor based detector: from X-ray to $\gamma$-ray},
author = {Shuo Zhang and Jing-Kai Xia and Tao Sun and Wen-Tao Wu and Bing-Jun Wu and Yong-Liang Wang and Robin Cantor and Ke Han and Xiao-Peng Zhou and Hao-Ran Liu and Fu-You Fan and Si-Ming Guo and Jun-Cheng Liang and De-Hong Li and Yan-Ru Song and Xu-Dong Ju and Qiang Fu and Zhi Liu},
journal= {arXiv preprint arXiv:2204.00010},
year = {2022}
}