1. In this event 240 eV electron is passing through the MICE Cerenkov detector

2. Definition of the materials in the detector. All numbers have to be carefully checked !!! Some of them are arbitrary Aerogel 1 Density = 0.251*g/cm3 Absorption length = 245.0*mm Refractive Index = 1.08 Rayleigh scattering length is calculated by the formula : Where C = 1e-24 m3

3. Aerogel 2 Density = 0.430 g/cm3 Absorption length = 245.0 mm - the same like in aerogel 1 ?!?! Refractive Index = 1.12 Rayleigh scattering length is calculated by the same formula and is the same like in Aerogel 1 ?!?! Optical glass (the material for the Glass window) Density = 2.6 g/cm3; Refractive Index = 1.4 The used absorption length is shown in the graphics Probably it is not the correct one No Rayleigh scattering in this material

4. Optical PMT glass (the material for the windows of the PMTs) Density = 2.6 g/cm3; Refractive Index = 1.4 No absorption in this material. No Rayleigh scattering in this material Optical air (only the vessels of the cerenkov detector are filled with this material) Density = 1.29 g/cm3; Refractive Index = 1.0 No absorption in this material. No Rayleigh scattering in this material

5. Energy and wavelength of the photons which hit the PMTs The time of the hits in the PMTs for Vessel 1 (n=1.08) and Vessel 2 (n=1.12)

6. Angle of incidence in Vessel 1 (n=1.08) and Vessel 2 (n=1.12) Number of photon hits per PMT in Vessel 1 (n=1.08) and Vessel 2 (n=1.12)

7. Number of photoelectrons in one digit in Vessel 1 and Vessel 2

8. The time of the first photoelectron in Vessel 1 and Vessel 2 The time of the photoelectron minus the time of the first

9. Performance of the shaper – the worst case scenario