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YANG Yan-Ji, LU Jing-Bin, WANG Yu-Sa, CHEN Yong, XU Yu-Peng, CUI Wei-Wei, LI Wei, LI Zheng-Wei, LI Mao-Shun, LIU Xiao-Yan, WANG Juan, HAN Da-Wei, CHEN Tian-Xiang, LI Cheng-Kui, HUO Jia, HU Wei, ZHANG Yi, LU Bo, ZHU Yue, MA Ke-Yan, WU Di, LIU Yan, ZHANG Zi-Liang, YIN Guo-He and WANG Yu. Proton irradiation effect on SCDs[J]. Chinese Physics C, 2014, 38(8): 086004. doi: 10.1088/1674-1137/38/8/086004
YANG Yan-Ji, LU Jing-Bin, WANG Yu-Sa, CHEN Yong, XU Yu-Peng, CUI Wei-Wei, LI Wei, LI Zheng-Wei, LI Mao-Shun, LIU Xiao-Yan, WANG Juan, HAN Da-Wei, CHEN Tian-Xiang, LI Cheng-Kui, HUO Jia, HU Wei, ZHANG Yi, LU Bo, ZHU Yue, MA Ke-Yan, WU Di, LIU Yan, ZHANG Zi-Liang, YIN Guo-He and WANG Yu. Proton irradiation effect on SCDs[J]. Chinese Physics C, 2014, 38(8): 086004.  doi: 10.1088/1674-1137/38/8/086004 shu
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Received: 2014-03-07
Revised: 2014-05-04
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Proton irradiation effect on SCDs

    Corresponding author: YANG Yan-Ji,

Abstract: The Low Energy X-ray Telescope is one of the main payloads on the Hard X-ray Modulation Telescope satellite. Swept charge devices (SCDs) are selected as detectors for the Low Energy X-ray Telescope. As SCDs are sensitive to proton irradiation, irradiation tests were 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 3×108 protons cm2 over two hours. By comparing the performance before and after irradiation, it is concluded that proton irradiation affects both the dark current and the charge transfer inefficiency of the SCD. The energy resolution of the proton-irradiated SCD is 212 eV@5.9 keV at -60℃, while it before irradiated is 134 eV. Moreover, better performance can be reached by lowering the operating temperature of the SCD in orbit.

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