Chinese Physics C > 2014, Vol. 38 > Issue(8): 086004 DOI: 10.1088/1674-1137/38/8/086004

Proton irradiation effect on SCDs

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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 3×10 ⁸protons cm ²over 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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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

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Received: 2014-03-07
Revised: 2014-05-04

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Proton irradiation effect on SCDs

Corresponding author:YANG Yan-Ji,

Received Date:2014-03-07

Accepted Date:2014-05-04

Available Online:2014-08-05

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 3×10⁸protons cm²over 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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Proton irradiation effect on SCDs

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通讯作者:陈斌, bchen63@163.com

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