Temperature effects on MIPs in the BGO calorimeters of DAMPE

Yuan-Peng Wang; Si-Cheng Wen; Wei Jiang; Chuan Yue; Zhi-Yong Zhang; Yi-Feng Wei; Long Zhang; Jing-Jing Zang; Jian Wu

doi:10.1088/1674-1137/41/10/106001

Chinese Physics C> 2017, Vol. 41> Issue(10) : 106001 DOI: 10.1088/1674-1137/41/10/106001

Temperature effects on MIPs in the BGO calorimeters of DAMPE

Yuan-Peng Wang ^1,2 ,
Si-Cheng Wen ^1,2 ,
Wei Jiang ^1,2 ,
Chuan Yue ^1,2 ,
Zhi-Yong Zhang ³ ,
Yi-Feng Wei ³ ,
Long Zhang ³ ,
Jing-Jing Zang ^1,, ,
Jian Wu ¹

1.
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Nanjing 210008, China
2.
University of Chinese Academy of Sciences, Yuquan Road 19, Beijing 100049, China
3.
State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
4.
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Nanjing 210008, China

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Abstract：
In this paper, we present a study of temperature effects on BGO calorimeters using proton MIPs collected in the first year of operation of DAMPE. By directly comparing MIP calibration constants used by the DAMPE data production pipe line, we find an experimental relation between the temperature and signal amplitudes of each BGO bar:a general deviation of -1.162%/℃, and -0.47%/℃ to -1.60%/℃ statistically for each detector element. During 2016, DAMPE's temperature changed by~8℃ due to solar elevation angle, and the corresponding energy scale bias is about 9%. By frequent MIP calibration operation, this kind of bias is eliminated to an acceptable value.
- BGO ,
- MIP ,
- temperature effect

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Yuan-Peng Wang, Si-Cheng Wen, Wei Jiang, Chuan Yue, Zhi-Yong Zhang, Yi-Feng Wei, Long Zhang, Jing-Jing Zang and Jian Wu. Temperature effects on MIPs in the BGO calorimeters of DAMPE[J]. Chinese Physics C, 2017, 41(10): 106001. doi: 10.1088/1674-1137/41/10/106001

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Received: 2017-03-24
Revised: 2017-07-06

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This work was supported by National Key Program for Research and Development (No. 2016YFA0400200) and by NSFC (11303105, 11673021). The DAMPE mission was funded by the strategic priority science and technology projects in space science of the Chinese Academy of Sciences (No. XDA04040000 and No. XDA04040400)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Temperature effects on MIPs in the BGO calorimeters of DAMPE

Corresponding author: Jing-Jing Zang,

1. Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Nanjing 210008, China

2. University of Chinese Academy of Sciences, Yuquan Road 19, Beijing 100049, China

3. State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China

4. Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Nanjing 210008, China

Received Date: 2017-03-24

Accepted Date: 2017-07-06

Available Online: 2017-10-05

Fund Project: This work was supported by National Key Program for Research and Development (No. 2016YFA0400200) and by NSFC (11303105, 11673021). The DAMPE mission was funded by the strategic priority science and technology projects in space science of the Chinese Academy of Sciences (No. XDA04040000 and No. XDA04040400)

Abstract: In this paper, we present a study of temperature effects on BGO calorimeters using proton MIPs collected in the first year of operation of DAMPE. By directly comparing MIP calibration constants used by the DAMPE data production pipe line, we find an experimental relation between the temperature and signal amplitudes of each BGO bar:a general deviation of -1.162%/℃, and -0.47%/℃ to -1.60%/℃ statistically for each detector element. During 2016, DAMPE's temperature changed by~8℃ due to solar elevation angle, and the corresponding energy scale bias is about 9%. By frequent MIP calibration operation, this kind of bias is eliminated to an acceptable value.

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Temperature effects on MIPs in the BGO calorimeters of DAMPE

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