Development of transparent silica aerogel over a wide range of densities

Details Development of transparent silica aerogel over a wide range of densities Development of transparent silica aerogel over a wide range of densities

2011-12-21

arxiv.org/abs/1112.5084v1

Nucl. Instr. and Meth. A 623 (2010) 339

Physics

Instrumentation and Detectors

Proceedings of 1st International Conference on Technology and Instrumentation in Particle Physics (TIPP 2009) in Nucl. Instr.

Scientific paper

10.1016/j.nima.2010.02.241

We have succeeded in developing hydrophobic silica aerogels over a wide range of densities (i.e. refractive indices). A pinhole drying method was invented to make possible producing highly transparent aerogels with entirely new region of refractive indices of 1.06-1.26. Obtained aerogels are more transparent than conventional ones, and the refractive index is well controlled in the pinhole drying process. A test beam experiment was carried out in order to evaluate the performance of the pinhole-dried aerogels as a Cherenkov radiator. A clear Cherenkov ring was successfully observed by a ring imaging Cherenkov counter. We also developed monolithic and hydrophobic aerogels with a density of 0.01 g/cm^3 (a low refractive index of 1.0026) as a cosmic dust capturer for the first time. Consequently, aerogels with any refractive indices between 1.0026 and 1.26 can be produced freely.

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