Characterization and Analysis of Cross-Talk on Monolithic SDD Arrays for the SIDDHARTA Experiment

Abstract

This work is mainly focused on characterization and analysis of cross-talk of a detection module for X-ray spectroscopy which is developed for the SIDDHARTA experiment. The SIDDHARTA experiment is designed to investigate strong nuclear interactions using exotic atoms in the field of nuclear physics. Silicon Drift Detectors (SDDs) used in this experiment are arranged in arrays of 2 $\times$4 elements with total area of 612 $mm^{2}$. At the final stage of SIDDHARTA experiment, 48 SDD arrays are needed to be utilized in a gantry structure to perform X-ray spectroscopy of exotic nuclei, like kaonic deuterium. Each single SDD unit in 2 $\times$4 formation of arrays is coupled to a charge sensitive preamplifier, namely CUBE, which is followed by shaping amplifier, and consequent analog and digital electronics that are all integrated on a custom developed multichannel chip called SFERA. This work aims to study the effect of charge sharing on SDD channels upon absorption of Xrays and background particles on SDD to investigate the performances of such devices when expected to be irradiated with X-rays signals and with a large background due to MIPs of the accelerator.