The 32 Analog Channels Readout for the Long-Flight GAPS Balloon Experiment Tracking System

The paper describes the main results of the characterization of the flight ASIC developed for the readout of a lithium-drifted silicon, Si(Li), detector-based tracker. The system aims to detect indirect signatures of dark matter through the identification of low-energy (<0.25GeV/n) cosmic-ray antiprotons, antideuterons, and antihelium. This instrument is developed in the frame of the GAPS (General AntiParticle Spectrometer) balloon experiment. The developed electronics consists of a 32-channels mixed-signal ASIC, designed in a commercial 180 nm CMOS technology and an ad-hoc front-end board (FEB). Data from charged particle detection are also reported.