c10507-11 Hamamatsu Photonics, K.K.,, c10507-11 Datasheet - Page 7

• Manufacturer Part Number: c10507-11
• Description: Mppc Modules
• Manufacturer: Hamamatsu Photonics, K.K.,

Description of terms
The MPPC module analog output is set so as to obtain a peak voltage of 100 mV at 1 p.e.
Output pulses are produced not only by photon-generated carriers but also by thermally-generated dark current carriers. The
dark current pulses are measured as dark count which then causes detection errors. The dark count can be reduced by lowering
the temperature. In the MPPC module, the count value measured at 0.5 p.e. is de¿ ned as the dark count.
This is a measure of what percent of the incident photons were detected. Not all carriers generated by the incidence of photons
will create pulses at an amplitude large enough to be detected, so photon detection ef¿ ciency is lower than quantum ef¿ ciency.
This indicates that one photon was detected. For example, a 1 p.e. pulse is equivalent to the pulse (including noise components)
obtained when one photon is detected.
In the MPPC module, the count value measured using a threshold of 0.5 p.e. is de¿ ned as the dark count.
Analog output voltage
Dark count
Photon detection ef¿ ciency: PDE
p.e. (photon equivalent)
MPPC modules
C10507-11 series, C10751 series
Cat. No. KACC1142E05 Sept. 2009 DN
7