Speaker
Ivo Polak
(Acad. of Sciences of the Czech Rep. (CZ))
Description
The gain of SiPMs depends both on bias voltage and on temperature. For
stable operations, both need to be kept constant. In an ILC calorimeter with
millions of channels this is a challenging task. It is, therefore, desirable
to compensate automatically for temperature variations by readjusting the
bias voltage. We have designed an adaptive power supply to achieve this
task. We anticipate a gain stability at the level of 1%. First, we present
measurements of the gain dependence on temperature and bias voltage for
several SiPMs from three different manufacturers and determine the dV/dT
dependence. We then demonstrate the performance of the gain stability with a
prototype that was constructed in industry after performing measurements
with a test board.
Primary author
Ivo Polak
(Acad. of Sciences of the Czech Rep. (CZ))
Co-author
Gerald Eigen
(University of Bergen (NO))
