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| resulting in 1600 scintillation photons within the forward capture cone of | | resulting in 1600 scintillation photons within the forward capture cone of |
| the fiber. Assuming that 80% of these are delivered to the SiPM active | | the fiber. Assuming that 80% of these are delivered to the SiPM active |
− | surface and a conservative estimate of 15\% for the efficiency of the SiPM | + | surface and a conservative estimate of 15% for the efficiency of the SiPM |
| leads to an estimate of 190 for the average SiPM pixel count per event. | | leads to an estimate of 190 for the average SiPM pixel count per event. |
| Monte Carlo simulations have shown that an efficient detection threshold | | Monte Carlo simulations have shown that an efficient detection threshold |
− | corresponds to 40\% of the average pulse height, or 80 SiPM pixels. This | + | corresponds to 40% of the average pulse height, or 80 SiPM pixels. This |
| implies a requirement for the dark rate that spontaneous pulses never | | implies a requirement for the dark rate that spontaneous pulses never |
| exceed 80 pixels. | | exceed 80 pixels. |
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| | | |
| == SiPM Measurements == | | == SiPM Measurements == |
| + | |
| + | {| class="wikitable" style="text-align:center" border="1" cellpadding="0" |
| + | |+ Summary of SiPM Properties measured at room temperature at the recommended -20.5V bias voltage |
| + | |- |
| + | !rowspan="2"| Device |
| + | !colspan="2"| Gain |
| + | !colspan="2"| PDE (yellow) |
| + | !colspan="2"| Dark Rate |
| + | |- |
| + | ! Nom. !! Meas. !! Nom. !! Meas. !! Nom. !! Meas. |
| + | |- |
| + | | SSPM-050701GR-TO18 [http://www.photonique.ch/DataSheets/SSPM_050701GR_TO18_Rev1.pdf] |
| + | | 0.8×10<sup>6</sup> || 1.1×10<sup>6</sup> ||~29% || ~30% || 10 MHz || 9.8 MHz |
| + | |- |
| + | | SSPM-0606BG4-PCB [http://www.photonique.ch/DataSheets/SSPM_0606BG4MM_PCB_vs1.pdf] |
| + | | 1.5×10<sup>5</sup> || 2.5×10<sup>5</sup> || 27% || 20-23% || 15 MHz || 8.9 MHz |
| + | |} |
| + | |
| + | |
| + | |
| | | |
| | | |