Novel one-sided readout type position-sensitive optical fiber radiation sensor based on the wavelength-resolving analysis

Terasaka, Yuta   ; Watanabe, Kenichi*; Uritani, Akira*

A novel one-sided readout type position-sensitive optical fiber radiation sensor was developed. This sensor measures the radiation intensity distribution along the fiber with light readout from only one side of the optical fiber. For the estimation of radiation intensity distribution, the wavelength spectrum at the fiber end, which contains the information of propagation distance of light inside the fiber, was analyzed. Using the unfolding method, radiation intensity distribution along the fiber could be estimated. We have developed two types of sensors, the high dose rate type and the low dose rate type, and demonstrated the position-detection performance of both detectors.