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Chinese Physics C> 2016, Vol. 40> Issue(2) : 026001 DOI: 10.1088/1674-1137/40/2/026001

Simulation of natural radioactivity backgrounds in the JUNO central detector

  • 1.

     School of Physics, Nankai University, Tianjin 300071, China

  • 2.

     Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 3.

      Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 4.

      State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 5.

      Sun Yat-sen University, Guangzhou 510275, China

  • 6.

      School of Physics, Nankai University, Tianjin 300071, China

  • The Jiangmen Underground Neutrino Observatory (JUNO) is an experiment proposed to determine the neutrino mass hierarchy and probe the fundamental properties of neutrino oscillation. The JUNO central detector is a spherical liquid scintillator detector with 20 kton fiducial mass. It is required to achieve a 3%/√(MeV) energy resolution with very low radioactive background, which is a big challenge to the detector design. In order to ensure the detector performance can meet the physics requirements, reliable detector simulation is necessary to provide useful information for the detector design. A simulation study of natural radioactivity backgrounds in the JUNO central detector has been performed to guide the detector design and set requirements for the radio-purity of the detector materials. The accidental background induced by natural radioactivity in the JUNO central detector is 1.1/day. The result is satisfied for the experiment.
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  • References

    [1] K. Eguchi et al (KamLAND Collaboration), Phys. Rev. Lett., 90: 021802 (2003)
    [2] Y. F. Li, J. Cao, Y. Wang, and L. Zhan, Phys. Rev. D, 88: 013008 (2013)
    [3] M. Apollonio et al (CHOOZ Collaboration), Eur. Phys. J. C, 27: 331 (2003)
    [4] C. Arpesella et al (Borexino Collaboration), Phys. Lett. B, 658: 101 (2008)
    [5] F. P. An et al (Daya Bay Collaboration), Phys. Rev. Lett., 108: 171803 (2012)
    [6] Y. Abe et al (Double Chooz Collaboration), Phys. Rev. Lett., 108: 131801 (2012)
    [7] J. K. Ahn et al (RENO Collaboration), Phys. Rev. Lett., 108: 191802 (2012)
    [8] S. Agostinelli et al (GEANT4 Collaboration), Nucl. Instrum. Methods A, 506: 250 (2003)
    [9] M. Motoki, F. Suekane, K. Tada and Y. Tsuda, Nucl. Instrum. Methods A, 534: 59 (2004)
    [10] J. Su et al (CDEX Collaboration), Chin. Phys. C, 39(3): 036001 (2015)

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Xin-Ying Li, Zi-Yan Deng, Liang-Jian Wen, Wei-Dong Li, Zheng-Yun You, Chun-Xu Yu, Yu-Mei Zhang and Tao Lin. Simulation of natural radioactivity backgrounds in the JUNO central detector[J]. Chinese Physics C, 2016, 40(2): 026001. doi: 10.1088/1674-1137/40/2/026001
Xin-Ying Li, Zi-Yan Deng, Liang-Jian Wen, Wei-Dong Li, Zheng-Yun You, Chun-Xu Yu, Yu-Mei Zhang and Tao Lin. Simulation of natural radioactivity backgrounds in the JUNO central detector[J]. Chinese Physics C, 2016, 40(2): 026001.  doi: 10.1088/1674-1137/40/2/026001 shu
Milestone
Received: 2015-05-13
Revised: 2015-08-26
Fund

    Supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDA10010900), CAS Center for Excellence in Particle Physics (CCEPP), National Natural Science Foundation of China (NSFC), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program, Joint Large-Scale Scientific Facility Funds of NSFC and CAS (U1332201)

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Simulation of natural radioactivity backgrounds in the JUNO central detector

  • 1. School of Physics, Nankai University, Tianjin 300071, China
  • 2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 3.  Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 4.  State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 5.  Sun Yat-sen University, Guangzhou 510275, China
  • 6.  School of Physics, Nankai University, Tianjin 300071, China
  • Received Date: 2015-05-13
  • Accepted Date: 2015-08-26
  • Available Online: 2016-02-20
Fund Project:  Supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDA10010900), CAS Center for Excellence in Particle Physics (CCEPP), National Natural Science Foundation of China (NSFC), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program, Joint Large-Scale Scientific Facility Funds of NSFC and CAS (U1332201)

Abstract: The Jiangmen Underground Neutrino Observatory (JUNO) is an experiment proposed to determine the neutrino mass hierarchy and probe the fundamental properties of neutrino oscillation. The JUNO central detector is a spherical liquid scintillator detector with 20 kton fiducial mass. It is required to achieve a 3%/√(MeV) energy resolution with very low radioactive background, which is a big challenge to the detector design. In order to ensure the detector performance can meet the physics requirements, reliable detector simulation is necessary to provide useful information for the detector design. A simulation study of natural radioactivity backgrounds in the JUNO central detector has been performed to guide the detector design and set requirements for the radio-purity of the detector materials. The accidental background induced by natural radioactivity in the JUNO central detector is 1.1/day. The result is satisfied for the experiment.

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