Silica aerogels in high energy physics
Silica aerogels in high energy physics
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DOI：
10.1016/s0022-3093(98)00057-x
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发表时间：
1998-04-01
影响因子：
3.5
通讯作者：
Yokogawa, H
中科院分区：
文献类型：
--
作者：
Sumiyoshi, T;Adachi, I;Yokogawa, H
低折射率二氧化硅气凝胶是用于高能物理中粒子识别的阈值切伦科夫计数器最方便的辐射体。对于KEK B工厂的贝儿检测器，我们已经生产了约2 m（3）n = 1.01-1.03的疏水二氧化硅气凝胶。气凝胶切伦科夫计数器的粒子识别能力进行了测试和3 σ π介子/质子分离已达到3.5 GeV/c。气凝胶的辐射硬度被确认为9.8 Mrad。由于提高了透明度，通过两步法制备的气凝胶不仅可以用作阈值型的辐射体，还可以用作环形成像型切伦科夫计数器的辐射体。(C)1998 Elsevier Science B. V.保留所有权利。
Low-refractive-index silica aerogel is the most convenient radiator for threshold Cherenkov counters, used for particle identification in high energy physics. For the BELLE detector at the KEK B-Factory we have produced about 2 m(3) of hydrophobic silica aerogels of n = 1.01-1.03. Particle identification capability of the aerogel Cherenkov counters was tested and 3 sigma pion/proton separation has been achieved at 3.5 GeV/c. Radiation hardness of the aerogels was confirmed to 9.8 Mrad. Thanks to the improved transparency, aerogels prepared by the two-step method can be used as radiators for not only threshold type but also for Ring Imaging type Cherenkov counters. (C) 1998 Elsevier Science B.V. All rights reserved.