Title: Cryogenic readout for multiple VUV4 Multi-Pixel Photon Counters in liquid xenon,
Abstract: We present the performances and characterization of an array made of
S13370-3050CN (VUV4 generation) Multi-Pixel Photon Counters manufactured by
Hamamatsu and equipped with a low power consumption preamplifier operating at
liquid xenon temperature (~ 175 K). The electronics is designed for the readout
of a matrix of maximum dimension of 8 x 8 individual photosensors and it is
based on a single operational amplifier. The detector prototype presented in
this paper utilizes the Analog Devices AD8011 current feedback operational
amplifier, but other models can be used depending on the application. A biasing
correction circuit has been implemented for the gain equalization of
photosensors operating at different voltages. The results show single photon
detection capability making this device a promising choice for future
generation of large scale dark matter detectors based on liquid xenon, such as
DARWIN.