NT & RP Journal
MEASUREMENT OF 60Co GAMMA RADIATION INDUCED ATTENUATION IN MULTIMODE STEP-INDEX POF AT 530 nm
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Vol. XXVIII, No. 2, Pp. 109-236
June 2013
UDC 621.039+614.876:504.06
ISSN 1451-3994

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Pages: 158-162

Authors: Milan S. Kovačević, Alexandar Djordjevich, Svetislav Savović, Jovan S. Bajić, Dragan Z. Stupar, Miloš P. Slankamenac, and Milojko Kovačević

Abstract

As optical fibres are used ever more extensively in space applications, nuclear industry, medicine and high-energy physics experiments, it has become essential to investigate the influence of ionizing radiation on their characteristics. In this work, the radiation-induced attenuation at 530 nm is investigated experimentally in step-index multimode polymethyl-methacrylate plastic optical fibres exposed to low dose-rate gamma radiation. Cumulative doses ranged from 50 Gy to 500 Gy. The radiation induced attenuation has been empirically found to obey the power law RIA= aDb, where D is the total radiation dose and a and ß are the constants determined by fitting.

Key words: plastic optical fibre, gamma radiation, radiation induced attenuation

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