Effect of gamma-ray irradiation on surface charge decay through bulk of epoxy resin
Effect of gamma-ray irradiation on surface charge decay through bulk of epoxy resin
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DOI：
10.1109/elinsl.2012.6251526
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
Y. Gao;B. Du
中科院分区：
文献类型：
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作者：
Y. Gao;B. Du
本文介绍了研究，旨在了解γ射线照射的环氧树脂的表面电荷衰减通过本体的效果。采用层压环氧树脂作为测试样品，在测试之前通过使用60 Co γ源以10 kGy / h的剂量率在空气中辐照高达100 kGy，然后高达1000 kGy。表面电荷引入电晕充电方法和表面电位衰减动态监测与静电电压表。陷阱分布以及有效的电荷迁移率估计从电位衰减测量。所得结果表明，表面电位衰减双指数，无论极性。电子和空穴在环氧树脂中呈现双陷阱中心特征，陷阱中心的密度和深度随总剂量的变化而变化。随着总剂量从0 kGy增加到1000 kGy，有效电荷迁移率先减小后增大。表面电荷衰减行为的变化归因于辐照引起的环氧树脂化学和物理结构的变化。
This paper presents study aimed at understanding the effect of gamma-ray irradiation on surface charge decay through bulk of epoxy resin. Laminated epoxy resin was employed as test sample which was irradiated in air up to 100 kGy and then up to 1000 kGy with dosage rate of 10 kGy / h by using a 60Co gamma-source before the test. Surface charge was introduced by corona charging method and surface potential decay dynamics was monitored with an electrostatic voltmeter. Trap distribution as well as effective charge mobility was estimated from the potential decay measurements. Obtained results show that surface potential decays bi-exponentially regardless of the polarity. Two-trap-center characteristics appear for both electron and hole in epoxy resin, the density as well as the depth in the trap center varies with the total dose. Effective charge mobility decreases initially then tends to increase with the total dose grows from 0 kGy to 1000 kGy. The change in the decay behavior of surface charge is attributed to the variation of chemical and physical structures of epoxy resin caused by the irradiation.