Fabrication of silica aerogel with n = 1.08 for e+/μ+ separation in a threshold Cherenkov counter of the J-PARC TREK/E36 experiment
Fabrication of silica aerogel with n = 1.08 for e+/μ+ separation in a threshold Cherenkov counter of the J-PARC TREK/E36 experiment
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在 J-PARC TREK/E36 实验的阈值切伦科夫计数器中制造 n = 1.08 的二氧化硅气凝胶，用于 e+/μ+ 分离
DOI：
10.1016/j.nima.2015.06.002
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
H. Yamazaki
中科院分区：
文献类型：
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作者：
M. Tabata;A. Toyoda;H. Kawai;Y. Igarashi;J. Imazato;S. Shimizu;H. Yamazaki
这项研究介绍了用于门限型切伦科夫计数器散热器的疏水二氧化硅气凝胶的发展。这些计数器将被用来分离J-Parc Trek/E36实验中由Kaon衰变产生的正电子和正Mu子。我们选择使用折射率为1.08的气凝胶来识别动量约为240 MeV/c的带电粒子，辐射器块形状设计为梯形截面，以适应Trek/E36探测器系统中心Kaon停止目标周围的筒状区域。包括备件在内，我们得到了30块无裂纹的气凝胶块，分成两层，每层厚度为2厘米，长度为18厘米，以填充12个计数器模块。光学测量表明，所制备的气凝胶瓷砖具有所需的折射率和透明度。
This study presents the development of hydrophobic silica aerogel for use as a radiator in threshold-type Cherenkov counters. These counters are to be used for separating positrons and positive muons produced by kaon decay in the J-PARC TREK/E36 experiment. We chose to employ aerogel with a refractive index of 1.08 to identify charged particles with momenta of approximately 240 MeV/c, and the radiator block shape was designed with a trapezoidal cross-section to fit the barrel region surrounding the kaon stopping target in the center of the TREK/E36 detector system. Including spares, we obtained 30 crack-free aerogel blocks segmented into two layers, each layer having a thickness of 2 cm and a length of 18 cm, to fill 12 counter modules. Optical measurements showed that the produced aerogel tiles had the required refractive indices and transparency.