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《中国物理C》(英文)编辑部
2024年10月30日

Calibration study of the X-T relation for the BESⅢ drift chamber

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KANG Xiao-Lin, WU Ling-Hui, WU Zhi, LUO Tao, HU Chen, WANG Hai-Xia, FANG Shuang-Shi, HE Kang-Lin, LI Wei-Dong, LI Wei-Guo, LIU Huai-Min, MAO Ze-Pu, WANG Liang-Liang, YUAN Ye and ZHANG Yao. Calibration study of the X-T relation for the BESⅢ drift chamber[J]. Chinese Physics C, 2015, 39(2): 026002. doi: 10.1088/1674-1137/39/2/026002
KANG Xiao-Lin, WU Ling-Hui, WU Zhi, LUO Tao, HU Chen, WANG Hai-Xia, FANG Shuang-Shi, HE Kang-Lin, LI Wei-Dong, LI Wei-Guo, LIU Huai-Min, MAO Ze-Pu, WANG Liang-Liang, YUAN Ye and ZHANG Yao. Calibration study of the X-T relation for the BESⅢ drift chamber[J]. Chinese Physics C, 2015, 39(2): 026002.  doi: 10.1088/1674-1137/39/2/026002 shu
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Received: 2014-05-12
Revised: 2014-06-28
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Calibration study of the X-T relation for the BESⅢ drift chamber

    Corresponding author: KANG Xiao-Lin,
    Corresponding author: WU Ling-Hui,

Abstract: Offline calibration plays an important role in BESⅢ offline data processing. In order to achieve good spatial and momentum resolution, it is necessary to implement high precision offline calibration for the BESⅢ drift chamber. This paper studies the time-to-distance relations, which are important calibration constants for track reconstruction. The parameterization of the time-to-distance relation, studies of left-right asymmetry and studies of variation with entrance angle are performed. The impact of dead channels on the time-to-distance relation is given special attention in order to reduce the shift in measured momentum for tracks passing near dead cells. Finally we present the resolutions for barrel Bhabha events (|cosθ|<0.8) from a J/ψ data set taken in 2012. The average spatial resolution is 123 μ and the momentum resolution for 1.548 GeV/c Bhabha tracks is 11.9 MeV/c.

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