In fibers made from organic plastic scintillators, a combination of extrinsic and intrinsic effects results in the attenuation of light and thus in a position-dependent light yield. The trapping of photons can further be affected if fibers are coated with or wrapped in a light-absorbing or reflecting material to suppress optical cross-talk. These effects have frequently been studied for long () fibers, yet little data is available for shorter ones. We experimentally studied the position-dependent light yield of single-cladded Kuraray SCSF-78 fibers with lengths of and tested the effect of different cross-talk-preventing materials. Contrary to the often acceptable simplification that light is transmitted in the fiber core alone, we found that photons trapped by the protective cladding significantly contribute to the light transmission in short fibers. In this paper, we perform an in-depth characterization of the position-dependent light yield of fibers sputter-coated with aluminum and wrapped in aluminum foil using a double-exponential attenuation function. Finally, we compare our findings to a simple photon transport model.

中文翻译：

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短涂层 SCSF-78 闪烁光纤中位置相关的光输出

在由有机塑料闪烁体制成的纤维中，外在和内在效应的结合会导致光的衰减，从而导致与位置相关的光输出。如果光纤涂有或包裹有光吸收或反射材料以抑制光学串扰，则光子的捕获会进一步受到影响。人们经常针对长纤维研究这些效应，但针对短纤维的数据却很少。我们通过实验研究了长度为 的单包层 Kuraray SCSF-78 光纤的位置依赖性光输出，并测试了不同防串扰材料的效果。与通常可接受的光仅在纤芯中传输的简化相反，我们发现被保护包层捕获的光子对短光纤中的光传输有显着贡献。在本文中，我们使用双指数衰减函数对溅射镀铝并包裹在铝箔中的光纤的位置相关光产额进行了深入表征。最后，我们将我们的发现与简单的光子传输模型进行比较。