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Chinese Physics C> 2004, Vol. 28> Issue(9) : 914-917 

Study on the Performance of YBJ Preliminary Carpet

  •  Department of Physics,Yunnan University,Kunming 650091,China2 Institute of High Energy Physics,CAS,Beijing 100039,China

  • The Sino-Italian collaboration YBJ-ARGO experiment is under construction at the Yang Bajing High Altitude Cosmic Ray Laboratory(Tibet,China,4300m a.s.l.,606g/cm2).About 693m2 of preliminary carpet detector have been instrumented and put into operation for calibration runs devoted to test the performance of the individual components and their integrated operation.Events collected with a "shower mode" trigger have been recorded to check the consistency of physics data.The performance and characteristics of a preliminary carpet detector are analyzed using its test run data at the high altitude conditions.Shower reconstruction algorithms are described together with the results after time offset correction.Results of the test run show the importance of the time correction for data analysis,and some results concerning detector calibration,azimuth angle distribution,zenith angle distribution and angular resolution are presented.
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    [1] . Abbressics M et al .Astroparticle Physics with ARGO Proposal, 19962. Santonico R et al. Nucl. Instrum. Methods, 1981, A187: 3373. LU Hong et al.HEP NP, 1999, 23: 417-424(in Chinese)(卢红等.高能物理与核物理,1999,23:417—424)4. HE Hui-Hai et al. HEP NP, 2001, 25(1) : 79-85)(in Chinese)(何会海等.高能物理与核物理,2001,25(1):79—85)5. QU Ruo-Fei et al .HEP NP, 2001, 25( 5) : 371-376. HE Hui-Hai et al.HEP NP, 2004, 28(4) : 422-425(in Chinese)(瞿若非等.高能物理与核物理,2001,25(5):371—376)7. CUI Shu-Wang. PhD thesis, Institute of High Energy Physics, CAS, 2004(in Chinese)(崔树旺.博士论文,中国科学院高能物理研究所,2004)8. Alexandreas D E et al .Nucl. Instrum.Methods, 1992, A331: 350

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LIU Kun, HE Hui-Hai, CHEN Xin, LU Hong, MU Jun, SHEN Pei-Ruo, TAN You-Heng, WU Chao-Yong, YANG Qun-Yu, ZHANG Hui-Min and ZHANG Yong. Study on the Performance of YBJ Preliminary Carpet[J]. Chinese Physics C, 2004, 28(9): 914-917.
LIU Kun, HE Hui-Hai, CHEN Xin, LU Hong, MU Jun, SHEN Pei-Ruo, TAN You-Heng, WU Chao-Yong, YANG Qun-Yu, ZHANG Hui-Min and ZHANG Yong. Study on the Performance of YBJ Preliminary Carpet[J]. Chinese Physics C, 2004, 28(9): 914-917. shu
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Received: 2004-02-12
Revised: 1900-01-01
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Study on the Performance of YBJ Preliminary Carpet

    Corresponding author: LIU Kun,
  • Department of Physics,Yunnan University,Kunming 650091,China2 Institute of High Energy Physics,CAS,Beijing 100039,China
  • Received Date: 2004-02-12
  • Accepted Date: 1900-01-01
  • Available Online: 2004-09-05

Abstract: The Sino-Italian collaboration YBJ-ARGO experiment is under construction at the Yang Bajing High Altitude Cosmic Ray Laboratory(Tibet,China,4300m a.s.l.,606g/cm2).About 693m2 of preliminary carpet detector have been instrumented and put into operation for calibration runs devoted to test the performance of the individual components and their integrated operation.Events collected with a "shower mode" trigger have been recorded to check the consistency of physics data.The performance and characteristics of a preliminary carpet detector are analyzed using its test run data at the high altitude conditions.Shower reconstruction algorithms are described together with the results after time offset correction.Results of the test run show the importance of the time correction for data analysis,and some results concerning detector calibration,azimuth angle distribution,zenith angle distribution and angular resolution are presented.

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