Abstract
The flexible fiber made of crystal systems AgBr – TlI and AgBr – TlBr0,46I0,54 has radioresistance properties, can be produced with permissible length, characterized by low optical losses with a small number and large radius of curves. This allows to use it for transmission of temperature signal from the surface of NPP equipment, including moving parts installed in the containment of NPP. Implementation of this method allows to avoid the operation of activated sensing elements in conditions of gamma and neutron fields of NPP containment. The optical fiber, suggested in the paper, is produced by the method of extrusion from single-crystal of silver and thallium halides and transparent in the mid-infrared band from 2,0 to 25,0 µm which is equivalent to the temperature range of -200…+1100°C.
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