Calibration study of the X-T relation for the BESIII drift chamberSupported by National Natural Science Foundation of China (11205184, 11205182, 11121092, 11179020) and Joint Funds of National Natural Science Foundation of China (U1232201)
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 importan...
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Published in | Chinese physics C Vol. 39; no. 2 |
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Main Authors | , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing
01.02.2015
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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 μm and the momentum resolution for 1.548 GeV/c Bhabha tracks is 11.9 MeV/c. |
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AbstractList | 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 μm and the momentum resolution for 1.548 GeV/c Bhabha tracks is 11.9 MeV/c. |
Author | Liu, Huai-Min Yuan, Ye Wu, Zhi Fang, Shuang-Shi Wang, Hai-Xia Hu, Chen Wang, Liang-Liang He, Kang-Lin Mao, Ze-Pu Luo, Tao Kang, Xiao-Lin Wu, Ling-Hui Zhang, Yao Li, Wei-Dong Li, Wei-Guo |
Author_xml | – sequence: 1 givenname: Xiao-Lin surname: Kang fullname: Kang, Xiao-Lin email: kangxl@mail.ihep.ac.cn organization: University of Chinese Academy of Sciences , Beijing 100049, China – sequence: 2 givenname: Ling-Hui surname: Wu fullname: Wu, Ling-Hui email: wulh@mail.ihep.ac.cn organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 3 givenname: Zhi surname: Wu fullname: Wu, Zhi organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 4 givenname: Tao surname: Luo fullname: Luo, Tao organization: University of Hawaii , Honolulu, Hawaii 96822, USA – sequence: 5 givenname: Chen surname: Hu fullname: Hu, Chen organization: Nanjing Normal University , Nanjing 210023, China – sequence: 6 givenname: Hai-Xia surname: Wang fullname: Wang, Hai-Xia organization: Central China Normal University , Wuhan 430079, China – sequence: 7 givenname: Shuang-Shi surname: Fang fullname: Fang, Shuang-Shi organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 8 givenname: Kang-Lin surname: He fullname: He, Kang-Lin organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 9 givenname: Wei-Dong surname: Li fullname: Li, Wei-Dong organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 10 givenname: Wei-Guo surname: Li fullname: Li, Wei-Guo organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 11 givenname: Huai-Min surname: Liu fullname: Liu, Huai-Min organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 12 givenname: Ze-Pu surname: Mao fullname: Mao, Ze-Pu organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 13 givenname: Liang-Liang surname: Wang fullname: Wang, Liang-Liang organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 14 givenname: Ye surname: Yuan fullname: Yuan, Ye organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China – sequence: 15 givenname: Yao surname: Zhang fullname: Zhang, Yao organization: Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, China |
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Snippet | Offline calibration plays an important role in BESIII offline data processing. In order to achieve good spatial and momentum resolution, it is necessary to... |
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Title | Calibration study of the X-T relation for the BESIII drift chamberSupported by National Natural Science Foundation of China (11205184, 11205182, 11121092, 11179020) and Joint Funds of National Natural Science Foundation of China (U1232201) |
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