Development of Unmanned Remote System to Find Radiation Sources Based on 4π Gamma Imaging

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  • Mukai Atsushi
    Department of Energy Engineering, Graduate School of Engineering, Nagoya University
  • Kanda Minato
    Department of Energy Engineering, Graduate School of Engineering, Nagoya University
  • Shimazoe Kenji
    Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo
  • Ishida Fumihiko
    National Institute of Technology, Toyama College
  • Takada Eiji
    National Institute of Technology, Toyama College
  • Tamura Yusuke
    Department of Robotics, Graduate School of Engineering, Tohoku University
  • Woo Hanwool
    Department of Mechanical Systems Engineering, School of Engineering, Kogakuin University
  • Takahashi Hiroyuki
    Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo
  • Uenomachi Mizuki
    Unit of Synergetic Studies for Space, Kyoto University
  • Asama Hajime
    Department of Precision Engineering, School of Engineering, The University of Tokyo
  • Kawarabayashi Jun
    Department of Nuclear Safety Engineering, Faculty of Science and Engineering, Tokyo City University
  • Tanabe Kosuke
    National Research Institute of Police Science
  • Tsuchiya Ken’ichi
    National Research Institute of Police Science
  • Kamada Kei
    New Industry Creation Hatchery Center, Tohoku University
  • Tomita Hideki
    Department of Energy Engineering, Graduate School of Engineering, Nagoya University

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<p>A prototype system based on a combination of 4π sensitive gamma imaging and simultaneous localization and mapping (SLAM) was developed to find unknown radiation source(s) rapidly. The system consisted of a spherical visible camera, a three-dimensional light detection and ranging, a CdTe pixel array detector for 4π gamma imaging, a portable battery, and a control laptop personal computer; these were mounted on an unmanned vehicle. In a search area of 16 × 16 m2 with a height of 3 m, the prototype system successfully demonstrated the finding of a 137Cs point source with an activity of 0.67 MBq in the surrounding thin walls.</p>

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