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首页> 外文会议>IEEE Nuclear Science Symposium >Dose and dose rate dependency of radiation-induced transient absorption in pure silica optical fibers under gamma irradiation
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Dose and dose rate dependency of radiation-induced transient absorption in pure silica optical fibers under gamma irradiation

机译：γ辐照下纯二氧化硅光纤中辐射诱导的瞬态吸收的剂量和剂量率依赖性

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摘要

The optical losses spectra in 300-800 nm region of silica core fibers with high and low OH-group content is measured in-situ and after 10 minutes of irradiation by γ-rays of ~(60)Co source. In-situ optical losses are separated to fast annealing (transient) and residual (stable) parts in order to analyze behavior of transient color centers with the change of dose and dose rate. The linear dependence of the magnitude of transient absorption caused by transient color centers is observed as a function of dose and its saturation at the dose ～5·10~7 Rad in silica core silica clad fiber is achieved. The saturation of transient color centers in silica core polymer clad fibers is achieved at ～10~7 Rad. The dependence of radiation-induced optical losses on dose rate is linear within the observed values 6-360 R/s. It's supposed that creation mechanism and concentration of transient color centers depend on OH-group content as well as core diameter and preliminary defects in fibers.
机译：用高和低OH-GA10含量的二氧化硅核心纤维的300-800nm区域中的光学损失光谱在原位测量，并在10分钟的γ射线照射后〜（60）CO源的辐射。原位光学损耗与快速退火（瞬态）和残差（稳定）零件分开，以便在剂量和剂量率的变化下分析瞬态颜色中心的行为。观察到由瞬态色中心引起的瞬态吸收幅度的线性依赖性作为剂量的函数，并且实现了二氧化硅核心二氧化硅包覆纤维的剂量〜5·10〜7ar的饱和度。二氧化硅核心聚合物包层纤维在〜10〜7 rad下实现瞬态颜色中心的饱和度。辐射诱导的光学损失对剂量率的依赖性是观察到的值6-360 r / s的线性。它认为，创建机制和瞬态颜色中心的浓度取决于OH-GROUP含量以及纤维中的核心直径和初步缺陷。

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