Simulation of the ASHIPH Cherenkov counters of the KEDR detector
- Mr. Ivan OVTIN
- Mr. Ivan OVTIN (BINP)
The particle identification system of the KEDR detector is based on aerogel threshold Cherenkov counters ASHIPH (Aerogel, SHifter, PHotomultiplier). The simulation program of the ASHIPH counters was developed based on the Geant3.21 package. The Geant3.21 description of the ASHIPH counters is integrated into the KEDR full detector simulation. The simulation of the ASHIPH system includes a realistic geometry description of all 160 counters (three active media - aerogel, shifter, teflon; electronics boxes and HV outputs). For all counters a realistic refractive index of materials was used. The measured inhomogeneities of the light collection in aerogel was taken into account for calculating the number of photo-electrons from the particles. The digitized amplitudes from calibrated single-photo-electron spectrum and Poisson distribution are generated. The amplitude spectra obtained in the simulation are in a agreement with experimental data.