Abstract
The article presents the results of a study of the concept of a distributed calorimetric fiber dosimeter based on the effect of stimulated–Brillouin scattering. The sensor design comprises one or several thermally insulated spherical sensing elements made of a material with a high γ-radiation attenuation coefficient fixed with a certain distance on an optical fiber. The change in the temperature of the sensor due to interaction with ionizing radiation is monitored using a stimulated Brillouin scattering analyzer, which allows temperature measurement over the entire length of the optical fiber at distances of up to several tens of kilometers. The results of model calculations of the efficiency of spherical sensor elements made of various materials are presented. The sensitivity range of the proposed dosimeter is estimated and the results of a preliminary experiment on the interaction of the sensor with γ-radiation are given. It is shown that the working range of the dosimeter is approximately 130 Gy/h–700 kGy/h.
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