Options for RICH detectors based on silica aerogels for the high-momentum range

TL;DR

This paper evaluates various silica aerogel-based RICH detector concepts for high-momentum particle identification in future collider experiments, using GEANT4 simulations and beam test validations.

Contribution

It introduces and compares multiple aerogel RICH detector designs tailored for 30 GeV/c particle identification in upcoming collider projects.

Findings

FARICH with multilayer aerogel shows promising focusing capabilities.

Simulation results align with beam test data for validation.

Different aerogel configurations offer varied trade-offs in detector performance.

Abstract

Nowadays, several projects of future colliding beam experiments are being considered in the world. Among them are the CEPC (Circular Electron Positron Collider) in China and the FCC (Future Circular Collider) at CERN (Switzerland). To perform experiments on flavor physics in the energy range of the projects an excellent particle identification up to momenta of 30 GeV/c is required. Several concepts of RICH detectors based on aerogel were considered and evaluated with the help of GEANT4 simulation: FARICH (Focusing Aerogel RICH) based on multilayer aerogel with maximal refractive index of 1.008, RICH with Fresnel lens based on aerogel with refractive index of 1.008, RICH based on transparent aerogel fibers with refractive index of 1.008. The results of the simulation are presented. Some results of beam tests at the BINP performed to validate GEANT4 simulation are presented as well.