Large-area silica aerogel for use as Cherenkov radiators with high refractive index, developed by supercritical carbon dioxide drying
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文摘

The Belle II A-RICH counter requires transparent silica aerogel Cherenkov radiators.

Required refractive index of hydrophobic aerogel tiles is approximately 1.05.

Mass production of large-area (18 cm × 18 cm × 2 cm), crack-free aerogel tiles is vital.

A method for producing aerogel tiles satisfying all requirements is established.

Crack-free aerogel tiles are ensured by pressure control in the supercritical drying.

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