H. Henschel, O. Kohn, W. Lennartz, S. Metzger, H. U. Schmidt, J. Rosenkranz, B. Glessner, B. Siebert
{"title":"Comparison between fast neutron and gamma irradiation of optical fibres","authors":"H. Henschel, O. Kohn, W. Lennartz, S. Metzger, H. U. Schmidt, J. Rosenkranz, B. Glessner, B. Siebert","doi":"10.1109/RADECS.1997.698960","DOIUrl":null,"url":null,"abstract":"A variety of undoped multimode step-index fibres and Ge-doped single mode and graded index fibres is irradiated by 14 MeV neutrons and /sup 60/Co gamma rays up to the same total dose. Radiation-induced loss and breaking stress are measured. The loss induced during gamma irradiation of Ge-doped fibres is about 2.5 times higher than during neutron irradiation with the same dose rate, up to a fluence of about 3/spl times/10/sup 12/ cm/sup -2/ (14 MeV). This loss ratio decreases to /spl les/2.0 after about 10/sup 13/ cm/sup -2/ (14 MeV). Monte Carlo calculations of the dose enhancement as caused by fast recoil protons out of the H-containing acrylate coating are confirmed experimentally. 14 MeV neutron irradiation up to /spl les/10/sup 13/ cm/sup -2/ seems to decrease fibre breaking stress by 3-4%, whereas /sup 60/Co gamma irradiation up to the same total dose has no effect.","PeriodicalId":106774,"journal":{"name":"RADECS 97. Fourth European Conference on Radiation and its Effects on Components and Systems (Cat. No.97TH8294)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"25","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"RADECS 97. Fourth European Conference on Radiation and its Effects on Components and Systems (Cat. No.97TH8294)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RADECS.1997.698960","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 25
Abstract
A variety of undoped multimode step-index fibres and Ge-doped single mode and graded index fibres is irradiated by 14 MeV neutrons and /sup 60/Co gamma rays up to the same total dose. Radiation-induced loss and breaking stress are measured. The loss induced during gamma irradiation of Ge-doped fibres is about 2.5 times higher than during neutron irradiation with the same dose rate, up to a fluence of about 3/spl times/10/sup 12/ cm/sup -2/ (14 MeV). This loss ratio decreases to /spl les/2.0 after about 10/sup 13/ cm/sup -2/ (14 MeV). Monte Carlo calculations of the dose enhancement as caused by fast recoil protons out of the H-containing acrylate coating are confirmed experimentally. 14 MeV neutron irradiation up to /spl les/10/sup 13/ cm/sup -2/ seems to decrease fibre breaking stress by 3-4%, whereas /sup 60/Co gamma irradiation up to the same total dose has no effect.
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