论文标题
LED的系统研究刺激了光学材料中辐射损伤的恢复
Systematic Study of LED Stimulated Recovery of Radiation Damage in Optical Materials
论文作者
论文摘要
光学材料中的辐射损害大多表现为失去光传递的丧失。停止辐射暴露时，光学材料从辐射损伤中恢复了一定程度。在刺激光的存在下，恢复的速度更快。另一方面，尚未详细执行对恢复动力学作为刺激光参数（例如其波长，强度和暴露持续时间和方法）的函数的系统研究。我们建立了一个LED恢复站，该站在自定义几何形状下的各种波长下提供脉冲和连续的光。我们以87.5 Gy/min的速度辐射苏打石灰玻璃样品，总剂量为3.5 kgy和7.0 kgy。然后在长时间内在200 nm -1500 nm范围内测量样品的光学透射率。随着刺激光的波长降低，从辐射损伤中恢复。当使用396 nm的紫外线LED进行刺激时，恢复率和永久性损害均可提高约50％。趋势是，在紫外线范围内更深的波长会导致从辐射损伤中更快，更有效地恢复。从辐射损伤中刺激的LED刺激恢复技术是在高辐射环境中运行的辐射和粒子探测器的光学介质的可行实现。
The radiation damage in optical materials mostly manifests itself as the loss of optical transmittance. The optical materials recover from radiation damage to some extent when the radiation exposure is stopped. The recovery is at a faster rate in the presence of stimulating light. On the other hand, a systematic study of the dynamics of the recovery as a function of the stimulating light parameters such as its wavelength, intensity and exposure duration and method has not been performed in detail yet. We established an LED recovery station which provides pulsed and continuous light at various wavelengths at custom geometries. We irradiated soda lime glass samples at a rate of 87.5 Gy/min to a total dose of 3.5 kGy and 7.0 kGy. The optical transmittance of the samples were then measured in 200 nm - 1500 nm range for an extended period of time. The recovery from radiation damage is improved, both in terms of timing and quantity, as the wavelength of the stimulating light decreases. Around 50 % improvement was measured both in recovery rate and the permanent damage when UV LED with a wavelength of 396 nm was used for stimulation. The trend is such that wavelengths deeper in the UV range would result in faster and more effective recovery from radiation damage. The LED stimulated recovery technique from radiation damage is a feasible implementation for the optical active media of radiation and particle detectors which operate in high radiation environments.
