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Description
We produce high transparent aerogel tiles with a thickness of 20, 30 and 40 mm and n = 1.05 and aerogel tiles with a thickness of 40 or 50 mm and n = 1.03. The new procedure of thermal annealing of aerogel allows us to produce several new aerogel samples with recordable lateral sizes in 2022-2023.
In a multilayer aerogel, the refractive index and layer thicknesses are chosen so that the images of Cherenkov rings from different layers coincide in the photon detector plane. In 2023, we produced several samples of four-layer focusing aerogel measuring 230×230×35 mm with the correct parameters for refractive index and transparency.
Single photon Cherenkov angle resolution is investigated with relativistic electrons at BINP beam test facilities “Extracted beams of VEPP-4M complex”.
Expected powers of particle separation with such aerogels and photon detector with pixel size 3x3 mm are following:
• for µ/π–separation up to 1.7 GeV/c;
• for π/K–separation up to 8.5 GeV/c;
• for µ/π–separation up to 14 GeV/c.
