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Development of a New Type of Germanium Detector for Dark Matter Searches

Received: 10 November 2014     Accepted: 14 November 2014     Published: 26 December 2014
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Abstract

A new type of germanium (Ge) detector for dark matter searches is under development utilizing the Ge crystal growth facility recently established at the University of South Dakota. Detector-grade crystals with electric impurity levels within 1010/cm3 and neutral impurity levels within 1014/cm3 have been grown regularly in the laboratory. These crystals can be fabricated into planar detectors with 1cm in thickness and 10cm in diameter. When a high voltage is applied to one of the end planes, a uniform electric field in the volume can be established. Such a design could result in a very fast electric signal. A time resolution of 1ns is expected by combining a short drift length and large drift mobility. This may allow us to resolve the difference on the electric pulse rise-time between low-energy nuclear recoil events and electronic recoil events at liquid nitrogen temperatures. An array of 168 planar detectors of this kind was modeled in a Geant4-based Monte Carlo simulation package. Its background reduction power was investigated and its sensitivity in dark matter search is estimated to be ~10-48cm2.

Published in American Journal of Modern Physics (Volume 4, Issue 1-1)

This article belongs to the Special Issue New Science Light Path on Cosmological Dark Matters

DOI 10.11648/j.ajmp.s.2015040101.15
Page(s) 23-29
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Nuclear Recoil, Rise Time Difference, Crystal Growth, Dark Matter Searches

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Cite This Article
  • APA Style

    Wenzhao Wei, Hao Mei, Guojian Wang, Gang Yang, Chao Zhang, et al. (2014). Development of a New Type of Germanium Detector for Dark Matter Searches. American Journal of Modern Physics, 4(1-1), 23-29. https://doi.org/10.11648/j.ajmp.s.2015040101.15

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    ACS Style

    Wenzhao Wei; Hao Mei; Guojian Wang; Gang Yang; Chao Zhang, et al. Development of a New Type of Germanium Detector for Dark Matter Searches. Am. J. Mod. Phys. 2014, 4(1-1), 23-29. doi: 10.11648/j.ajmp.s.2015040101.15

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    AMA Style

    Wenzhao Wei, Hao Mei, Guojian Wang, Gang Yang, Chao Zhang, et al. Development of a New Type of Germanium Detector for Dark Matter Searches. Am J Mod Phys. 2014;4(1-1):23-29. doi: 10.11648/j.ajmp.s.2015040101.15

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  • @article{10.11648/j.ajmp.s.2015040101.15,
      author = {Wenzhao Wei and Hao Mei and Guojian Wang and Gang Yang and Chao Zhang and Yutong Guan and Jing Liu and Dongming Mei and Christina Keller and Yiju Wang and Dahai Xu},
      title = {Development of a New Type of Germanium Detector for Dark Matter Searches},
      journal = {American Journal of Modern Physics},
      volume = {4},
      number = {1-1},
      pages = {23-29},
      doi = {10.11648/j.ajmp.s.2015040101.15},
      url = {https://doi.org/10.11648/j.ajmp.s.2015040101.15},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmp.s.2015040101.15},
      abstract = {A new type of germanium (Ge) detector for dark matter searches is under development utilizing the Ge crystal growth facility recently established at the University of South Dakota. Detector-grade crystals with electric impurity levels within 1010/cm3 and neutral impurity levels within 1014/cm3 have been grown regularly in the laboratory. These crystals can be fabricated into planar detectors with 1cm in thickness and 10cm in diameter. When a high voltage is applied to one of the end planes, a uniform electric field in the volume can be established. Such a design could result in a very fast electric signal. A time resolution of 1ns is expected by combining a short drift length and large drift mobility. This may allow us to resolve the difference on the electric pulse rise-time between low-energy nuclear recoil events and electronic recoil events at liquid nitrogen temperatures. An array of 168 planar detectors of this kind was modeled in a Geant4-based Monte Carlo simulation package. Its background reduction power was investigated and its sensitivity in dark matter search is estimated to be ~10-48cm2.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Development of a New Type of Germanium Detector for Dark Matter Searches
    AU  - Wenzhao Wei
    AU  - Hao Mei
    AU  - Guojian Wang
    AU  - Gang Yang
    AU  - Chao Zhang
    AU  - Yutong Guan
    AU  - Jing Liu
    AU  - Dongming Mei
    AU  - Christina Keller
    AU  - Yiju Wang
    AU  - Dahai Xu
    Y1  - 2014/12/26
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ajmp.s.2015040101.15
    DO  - 10.11648/j.ajmp.s.2015040101.15
    T2  - American Journal of Modern Physics
    JF  - American Journal of Modern Physics
    JO  - American Journal of Modern Physics
    SP  - 23
    EP  - 29
    PB  - Science Publishing Group
    SN  - 2326-8891
    UR  - https://doi.org/10.11648/j.ajmp.s.2015040101.15
    AB  - A new type of germanium (Ge) detector for dark matter searches is under development utilizing the Ge crystal growth facility recently established at the University of South Dakota. Detector-grade crystals with electric impurity levels within 1010/cm3 and neutral impurity levels within 1014/cm3 have been grown regularly in the laboratory. These crystals can be fabricated into planar detectors with 1cm in thickness and 10cm in diameter. When a high voltage is applied to one of the end planes, a uniform electric field in the volume can be established. Such a design could result in a very fast electric signal. A time resolution of 1ns is expected by combining a short drift length and large drift mobility. This may allow us to resolve the difference on the electric pulse rise-time between low-energy nuclear recoil events and electronic recoil events at liquid nitrogen temperatures. An array of 168 planar detectors of this kind was modeled in a Geant4-based Monte Carlo simulation package. Its background reduction power was investigated and its sensitivity in dark matter search is estimated to be ~10-48cm2.
    VL  - 4
    IS  - 1-1
    ER  - 

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Author Information
  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • Department of Physics, The University of South Dakota, Vermillion, SD 57069, United States

  • School of Physics and Optoelectronic, Yangtze University, Jingzhou 434023, China

  • School of Physics and Optoelectronic, Yangtze University, Jingzhou 434023, China

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