Speaker
Dr
Yuji Sudo
(DESY)
Description
The construction of a highly granular scintillator-tile calorimeter with 22000 MPPCs
required new approached to quality control and provided both test bench and in-situ
data for the characterisation of a large sample of photo-sensors. Thanks to the
excellent uniformity of device parameters, it was possible to stabilise the MPPC
responses in the presence of temperature variations by automatic adaptations of
the bias voltage on the basis of regular temperature measurements. The talk will
present the approach to parameter monitoring during the construction phase,
in-situ characterisation results and report the experience with the implementation
of automatic temperature compensation at system level.
Primary author
Dr
Yuji Sudo
(DESY)
