Study of a silica aerogel for a Cherenkov radiator
Study of a silica aerogel for a Cherenkov radiator
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DOI：
10.1016/j.nima.2008.07.056
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发表时间：
2008-09-21
影响因子：
1.4
通讯作者：
Tabata, Makoto
中科院分区：
文献类型：
--
作者：
Adachi, Ichiro;Ishii, Yoshikazu;Tabata, Makoto
已为将安装在 Belle前向端盖装置中的RICH探测器中的切伦科夫辐射体开发出了高透明度的二氧化硅气凝胶。我们针对1.03 - 1.07左右的较宽折射率范围改进了气凝胶的光学性能。成功优化了气凝胶生产中控制合成过程的参数，并且在此折射率范围内所获得的传输长度几乎增加了一倍。为了进行测试束实验，使用新生产的气凝胶样品构建了一个原型，并证实切伦科夫光产额显著增加。使用X射线断层扫描设备检测了气凝胶块中折射率的均匀性，发现偏差足够小。此外，还描述了由具有不同折射率的两层组成的整体式气凝胶的生产。（C）2008爱思唯尔有限公司。保留所有权利。
Highly transparent silica aerogel has been developed for a Cherenkov radiator in a RICH detector to be installed into the Belle forward end-cap apparatus. We have improved the aerogel optical properties for a wide range of refractive indices around 1.03-1.07. The parameters that control a synthesis process in the aerogel production were successfully optimized, and the obtained transmission length for this index range was almost doubled. A prototype was constructed using newly produced aerogel samples in order to carry out a test beam experiment, and a remarkable increase in the Cherenkov light yield was confirmed. The uniformity of refractive index in an aerogel block was examined using an X-ray tomography device and the deviation was found to be sufficiently small. Furthermore, the production of a monolithic aerogel consisting of two layers with different refractive indices is also described. (C) 2008 Elsevier B.V. All rights reserved.