Title :
Radiation distribution sensing with normal optical fiber
Author :
Naka, R. ; Watanabe, K. ; Kawarabayashi, J. ; Uritani, A. ; Iguchi, T. ; Hayashi, N. ; Kojima, N. ; Yoshida, T. ; Kaneko, J. ; Takeuchi, H. ; Kakuta, T.
Author_Institution :
Dept. of Nucl. Eng., Nagoya Univ., Aichi, Japan
Abstract :
The purpose of this study is to develop a radiation distribution monitor using a normal plastic optical fiber. The monitor has a long operating length and can obtain continuous radiation distributions. A principle of the position sensing is based on a time-of-flight technique. The monitor is sensitive to beta rays or charged particles, gamma rays, and fast neutrons. The spatial resolutions for beta-rays (/sup 90/Sr-/sup 90/Y), gamma-rays (/sup 137/Cs), and D-T neutrons are 30, 37, and 13 cm, respectively. The detection efficiencies for the beta-rays, gamma-rays, and D-T neutrons are 0.11%, 1.6/spl times/10/sup -5/% and 1.2/spl times/10/sup -4/%, respectively. The effective attenuation length of the detection efficiency is 18 m. In this paper, we describe the basic characteristics of this monitor.
Keywords :
beta-ray detection; fibre optic sensors; gamma-ray detection; neutron detection; position sensitive particle detectors; solid scintillation detectors; beta rays; charged particles; continuous radiation distributions; detection efficiencies; effective attenuation length; fast neutrons; gamma rays; normal plastic optical fiber; position sensing; radiation distribution monitor; time-of-flight technique; Attenuation; Beta rays; Gamma ray detection; Gamma ray detectors; Gamma rays; Neutrons; Optical fibers; Plastics; Radiation monitoring; Spatial resolution;
Journal_Title :
Nuclear Science, IEEE Transactions on
