Nuisances of SiPMs and how to deal with them in ... - KICP Workshops

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PMT signals Concept of the SumTrigger with Clipping Signal Clipper Signal Clipper Signal Clipper Signal Clipper . . . Clipping is an effective way of reducing OC effects at trigger (original idea E. Lorentz) Σ Concept proven in MAGIC and also applied in FACT (see next talk) For the US SCT we do not plan a clipping stage in the trigger Because several SiPMs with OC eliminating trenches become available Ketek, ST Microelectronics, Hamamatsu, .... Optimization of point of operation PDE vs. optical crosstalk See talk by D. Williams
Dependency of gain on NSB rate Larger NSB -> larger current -> larger voltage drop over R1 (~10k) -> lower bias on SiPM -> lower gain / PDE Example Hamamatsu: Change NSB rate by 100 MHz -> 25% change in gain Again, lower capacitance would help Replace with inductor Possible solution use inductor instead of resistor Nepomuk Otte 29
Page 1 and 2: Nuisances of SiPMs and how to deal
Page 3 and 4: CTA-US SC telescope Schwarzschild C
Page 5 and 6: Module Conceptional Design Cold fin
Page 7 and 8: Night Sky Background Light From sta
Page 9 and 10: Intensities are not to scale Nepomu
Page 11 and 12: P(n) = λ n /n! exp(-λ) Non-Poisso
Page 13 and 14: Operational Requirements Purpose of
Page 15 and 16: Output signals
Page 17 and 18: Faster output pulses by adding one
Page 19 and 20: Temperature Dependencies Critical E
Page 21 and 22: PDE Different effects contribute to
Page 23 and 24: Conceptual Design Primary goal for
Page 25 and 26: Photon Emission during Breakdown Av
Page 27: Non-Poisson tails due to optical cr

Nuisances of SiPMs and how to deal with them in ... - KICP Workshops

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