Thermal analysis and expected performance of the low energy instrument on board the HXMT satellite

WANG Yu-Sa; CHEN Yong; XU Yu-Peng; WANG Juan; CUI Wei-Wei; LI Wei; HAN Da-Wei; ZHANG Zi-Liang; CHEN Tian-Xiang; LI Cheng-Kui; YANG Yan-Ji; LIU Xiao-Yan; HUO Jia; ZHANG Jun-Min; ZHENG Yi-Qian

doi:10.1088/1674-1137/34/12/005

Chinese Physics C> 2010, Vol. 34> Issue(12) : 1812-1817 DOI: 10.1088/1674-1137/34/12/005

Thermal analysis and expected performance of the low energy instrument on board the HXMT satellite

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The Low Energy X-ray Instrument (LE) of the Hard X-ray Modulation Telescope (HXMT) uses the Swept Charge Device (SCD) to detect the X-rays in 1—15 keV. The performance of SCD is vulnerable to temperature. We analyzed the thermal condition of LE at different satellite working attitudes with the Finite Element Method (FEM). It is shown that the angle between the sunlight and the normal line of the barrier should be less than 26°, to keep the SCD detectors working in the required temperature range, i.e. －40 ℃ to －80 ℃. We find that the performance of LE is very stable in this temperature range, with a typical energy resolution of 160 eV at 5.9 keV.

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WANG Yu-Sa, CHEN Yong, XU Yu-Peng, WANG Juan, CUI Wei-Wei, LI Wei, HAN Da-Wei, ZHANG Zi-Liang, CHEN Tian-Xiang, LI Cheng-Kui, YANG Yan-Ji, LIU Xiao-Yan, HUO Jia, ZHANG Jun-Min and ZHENG Yi-Qian. Thermal analysis and expected performance of the low energy instrument on board the HXMT satellite[J]. Chinese Physics C, 2010, 34(12): 1812-1817. doi: 10.1088/1674-1137/34/12/005

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Received: 2010-02-01
Revised: 2010-04-06

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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

Thermal analysis and expected performance of the low energy instrument on board the HXMT satellite

Corresponding author: WANG Yu-Sa,

Received Date: 2010-02-01

Accepted Date: 2010-04-06

Available Online: 2010-12-05

Abstract: The Low Energy X-ray Instrument (LE) of the Hard X-ray Modulation Telescope (HXMT) uses the Swept Charge Device (SCD) to detect the X-rays in 1—15 keV. The performance of SCD is vulnerable to temperature. We analyzed the thermal condition of LE at different satellite working attitudes with the Finite Element Method (FEM). It is shown that the angle between the sunlight and the normal line of the barrier should be less than 26°, to keep the SCD detectors working in the required temperature range, i.e. －40 ℃ to －80 ℃. We find that the performance of LE is very stable in this temperature range, with a typical energy resolution of 160 eV at 5.9 keV.

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Thermal analysis and expected performance of the low energy instrument on board the HXMT satellite

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