The Low Energy X-ray Telescope is a main payload on the Hard X-ray Modulation Telescope satellite. The swept charge device is selected for the Low Energy X-ray Telescope. As swept charge devices are sensitive to proton irradiation, irradiation test was carried out on the HI-13 accelerator at the China Institute of Atomic Energy. The beam energy was measured to be 10 MeV at the SCD. The proton fluence delivered to the SCD was 3×108protons/cm2 over two hours. It is concluded that the proton irradiation affects both the dark current and the charge transfer inefficiency of the SCD through comparing the performance both before and after the irradiation. The energy resolution of the proton-irradiated SCD is 212 eV@5.9 keV at −60∘C, while it before irradiated is 134 eV. Moreover, better performance can be reached by lowering the operating temperature of the SCD on orbit.
@article{arxiv.1404.4931,
title = {Proton irradiation effect on SCDs},
author = {Yan-Ji Yang and Jing-Bin Lu and Yu-Sa Wang and Yong Chen and Yu-Peng Xu and Wei-Wei Cui and Wei Li and Zheng-Wei Li and Mao-Shun Li and Xiao-Yan Liu and Juan Wang and Da-Wei Han and Tian-Xiang Chen and Cheng-Kui Li and Jia Huo and Wei Hu and Yi Zhang and Bo Lu and Yue Zhu and Ke-Yan Ma and Di Wu and Yan Liu and Zi-Liang Zhang and Guo-He Yin and Yu Wang},
journal= {arXiv preprint arXiv:1404.4931},
year = {2015}
}