{"title":"The dielectric behaviour of polymers irradiated at 5 K","authors":"H. M. Banford, D. Tedford, M. Ayoubi","doi":"10.1109/CEIDP.1988.26323","DOIUrl":null,"url":null,"abstract":"A measurement system was developed to carry out frequency domain dielectric spectroscopy and TSDC (thermally stimulated discharge currents) automatically on multiple samples which can be irradiated in helium over a wide temperature range from 5 to 300 K. The system was used to study the dielectric behavior of polyimide and low-density polyethylene (LDPE) as a function of temperature and gamma radiation. Measurements of loss in polyimide and LDPE gamma-irradiated at 5 K to doses of 10/sup 5/ Gy show no effects of radiation. A TSDC signal was observed for polyimide irradiated to 10/sup 5/ Gy. The small currents evident at low temperatures are probably due to geminate carriers, and there is a beta peak around 170 K.<<ETX>>","PeriodicalId":149735,"journal":{"name":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","volume":"57 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1988-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CEIDP.1988.26323","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
A measurement system was developed to carry out frequency domain dielectric spectroscopy and TSDC (thermally stimulated discharge currents) automatically on multiple samples which can be irradiated in helium over a wide temperature range from 5 to 300 K. The system was used to study the dielectric behavior of polyimide and low-density polyethylene (LDPE) as a function of temperature and gamma radiation. Measurements of loss in polyimide and LDPE gamma-irradiated at 5 K to doses of 10/sup 5/ Gy show no effects of radiation. A TSDC signal was observed for polyimide irradiated to 10/sup 5/ Gy. The small currents evident at low temperatures are probably due to geminate carriers, and there is a beta peak around 170 K.<>
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