| 光谱学与光谱分析 |
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| Temperature Effect Correction for Chang’E-3 Alpha Particle X-Ray Spectrometer |
| WU Ming-ye, WANG Huan-yu*, PENG Wen-xi，ZHANG Cheng-mo, ZHANG Jia-yu, CUI Xing-zhu, LIANG Xiao-hua, WANG Jin-zhou, YANG Jia-wei, FAN Rui-rui, LIU Ya-qing, DONG Yi-fan, WU Feng, ZHAO Xiao-yun |
| Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Alpha particle X-ray spectrometer (APXS) is one of the payloads of Chang’E-3 lunar rover of China’s Lunar Exploration Project. The present paper introduces briefly the components of APXS, how it works and its working environment on the lunar surface. The environmental temperature effect has been studied with simulations and experiments, and the results show that the temperature of the APXS sensor will be varying during the measuring on the lunar surface. And another experiment reveals that the energy resolution becomes worse if the sensor’s temperature is varying. In this paper, a correction method based on Pearson’s chi-squared test is presented. The method can improve the energy resolution when the sensor’s temperature is varying. We have tested the method with the spectra acquired by APXS in the temperature varying period of Temperature Cycling Test, and the results show that the method is efficient and reliable.
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Received: 2012-02-04
Accepted: 2012-04-16
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Corresponding Authors:
WANG Huan-yu
E-mail: wanghy@ihep.ac.cn
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