Investigation into Cherenkov light scattering and refraction on aerogel surface

A. Yu Barnyakov, M. Yu Barnyakov, V. S. Bobrovnikov, A. R. Buzykaev, A. F. Danilyuk, A. A. Katcin, P. S. Kirilenko, S. A. Kononov, D. V. Korda, E. A. Kravchenko, V. N. Kudryavtsev, I. A. Kuyanov, A. P. Onuchin, I. V. Ovtin, N. A. Podgornov, A. Yu Predein, V. G. Prisekin, R. S. Protsenko, L. I. Shekhtman

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The work concerns the development of aerogel radiators for RICH detectors. Aerogel tiles with a refractive index of 1.05 were tested with a RICH prototype on the electron beam on the VEPP-4M collider. It has been shown that polishing with silk tissue yields good surface quality, the amount of light loss at this surface being about 5–7%. The Cherenkov angle resolution was measured for a tile in two conditions: with a clean exit face and with a polished exit face. The number of photons detected was 13.3 and 12.7 for the clean and polished surfaces, respectively. The Cherenkov angle resolution for the polished surface is 55% worse, which can be explained with the forward scattering on the polished surface. A tile with a crack inside was also tested. The experimental data show that the Cherenkov angle resolution is the same for tracks crossing the crack area and in a crack-free area.

Original languageEnglish
Pages (from-to)249-251
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 21 Dec 2017


  • Aerogel
  • Particle identification
  • Ring imaging Cherenkov counter


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