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Saturation effect of MPPC

Saturation effect of MPPC. Introduction. MPPC output signal saturates because of its limited number of pixels. <Npix> = Nmax(1-exp(-Nph/Nmax)) Nmax : Number of MPPC pixels Nph : Number of photons Npix : Number of hit pixels We take into account this effect in the calorimeter simulation.

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Saturation effect of MPPC

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  1. Saturation effect of MPPC

  2. Introduction • MPPC output signal saturates because of its limited number of pixels. • <Npix> = Nmax(1-exp(-Nph/Nmax)) • Nmax : Number of MPPC pixels • Nph : Number of photons • Npix : Number of hit pixels • We take into account this effect in the calorimeter simulation

  3. Energy deposit in each 1cm x 5cm strip 10GeV muon MeV

  4. Energy deposit in each 1cm x 5cm strip 10GeV electron 50GeV electron 100GeV electron 250GeV electron

  5. Assumptions • Nph(MIP)=5 or 10 • Nmax=400, 1600, and 6400 • Perfect MPPC is assumed： i.e. No cross-talk, no noise

  6. 1GeV electron Nph Nmax=400 Nmax=6400 Nmax=1600

  7. 250GeV electron

  8. Results for Nph(MIP=5) 6400pix 1600pix 400pix

  9. Results for Nph(MIP=10)

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