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→Results for Hamamatsu 400 pixel MPPC
| [[Image:hVb702_T25.gif|250px]] || [[Image:hVb710_T25.gif|250px]]
| [[Image:hVb702_T25.gif|250px]] || [[Image:hVb710_T25.gif|250px]]
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<|colspan="2" | Pulse height spectrum at fixed pulser intensity and temperature 25°C, and increasing bias voltage V<sub>b</sub> = 69.5V (upper left), 70.0V (upper right), 70.2V (lower left), and 71.0V (lower right).
<|colspan="2" | Pulse height (V-s) spectrum at fixed pulser intensity and temperature 25°C, and increasing bias voltage V<sub>b</sub> = 69.5V (upper left), 70.0V (upper right), 70.2V (lower left), and 71.0V (lower right).
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| [[Image:hDVb700_T25.gif|250px]]
| [[Image:hDVb700_T25.gif|250px]]
|Pulse height spectrum with zero pulser intensity and temperature 25°C, and bias voltage V<sub>b</sub> = 70.0V.
|Pulse height (V-s) spectrum with zero pulser intensity and temperature 25°C, and bias voltage V<sub>b</sub> = 70.0V.
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:# <math>\beta</math> = fraction of peak integral in left-side tail
:# <math>\beta</math> = fraction of peak integral in left-side tail
:# <math>\sigma</math> = sigma of Gaussian right-side tail
:# <math>\sigma</math> = sigma of Gaussian right-side tail
* The mean cross-talk parameter, formerly <i>p</i>μ in the treatment described above, has been replaced with <i>p</i><sup>2</sup>μ.
Without the second change above, the fit to the data is significantly worse. It might be explained by the tendency of cross-talk to bunch up because of self-coupling feedback. A simpler explanation might be that it takes into account a natural variation in the light output of the pulser from pulse to pulse. This remains to be investigated. The parameters of the fit function listed in the above plots are listed below.
# Integral of fit function, in rescaled (''pe'') x-axis units.
# Centroid of zero ''pe'' peak, in V-s.
# Gain of readout, in V-s/''pe''.
# Mean detected photon count
# Mean cross-talk pixels per detected photon
# Excess noise per pixel, in ''pe''
# α parameter of peak shape function, see above
# σ parameter of peak shape function, see above
# β parameter of peak shape function, see above
= Links =
= Links =