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Comparative study on the degradation of UV optical fibers subjected to electron beam and gamma ray irradiation

机译：电子束和γ射线辐照对紫外线光纤降解的比较研究

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The present paper continues our previous research on the degradation of UV optical fibers under irradiation and reports, as a novelty in the filed, a comparative study on the radiation induced optical attenuation in three commercial available, UV optical fibers subjected to electron beam, gamma ray and bremsstrahlung irradiation. The purposes of these investigations were on one side to evaluate the radiation sensitivity of UV optical fibers under conditions not reported previously in the literature and, on the other side, to estimate the possible use of various types of such optical fibers for radiation detection/monitoring. The dependency of the optical attenuation at specific wavelengths was measured as a function of the optical fiber type and irradiation conditions, such as dose rate, total dose, and temperature stress applied during the irradiation. In this paper, we investigate also the behavior of H2-loaded UV optical fiber with metal coating when irradiation and heating are applied simultaneously. H2-loading of UV optical fibers proved to be a reliable mean to increase the radiation hardness in the case of UV optical fibers, and sample heating during the irradiation affect less the Al coated optical fibers than polyimide coated ones. A linear dependency of the optical attenuation on the total dose was observed for H2-loaded samples and in the case of solarisation resistant optical fibers. We suggest that a proper balance between radiation hardening and sensitivity to radiation of UV optical fibers can pave the way towards their use in radiation monitoring.
机译：本论文继续了我们先前对辐照下紫外线光纤降解的研究，并作为一种新颖的方法，报告了在三种市售的受到电子束，γ射线照射的紫外线光纤中，辐射诱发的光衰减的比较研究。和致辐射。这些研究的目的是一方面评估在先前文献中未报告的条件下UV光纤的辐射敏感性，另一方面，评估各种类型的此类光纤可能用于辐射检测/监视的可能性。 。根据光纤类型和辐照条件（例如剂量率，总剂量和辐照过程中施加的温度应力），测量特定波长下光衰减的依赖性。在本文中，我们还研究了同时施加辐射和加热时带有金属涂层的H2负载的UV光纤的行为。紫外线光纤的H2负载被证明是增加紫外线光纤辐射强度的可靠手段，并且在辐照过程中样品加热对铝涂层光纤的影响小于聚酰亚胺涂层。对于加载了H 2的样品以及在抗日晒的光纤中，观察到了光衰减与总剂量的线性关系。我们建议在辐射硬化和对UV光纤的辐射敏感性之间取得适当的平衡，可以为它们在辐射监控中的使用铺平道路。

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