Systematic investigations of RICH and TRD detector parameters on electron identification in the CBM experiment

Several new features were implemented in the RICH detector simulation to improve the realistic detector response: mirror surface inhomogeneities, photodetector coverage with wavelength shifter (WLS) films, collection efficiency of the photodetector. These features mostly influence the ring finder, which was tested in order to obtain limitations for the detector parameters. For this study central UrQMD Au+Au collisions at 25 AGeV beam energy with 10 embedded primary e and e− were simulated. The effect of light scattering due to mirror surface inhomogeneities was implemented as additional error with gaussian distribution to the hit measurement. As a reference point σgauss = 0.6 mm was taken, which is expected for new CBM-RICH mirror prototypes (corresponding D0=2.4 mm). Different values of σgauss were tested, results are presented in Tab. 1.