12nd May 2021 - Tonight the installation of the new Internal Tracking System (ITS) of the ALICE experiment, based on ultra-thin silicon-sensors (50-100 micron), has been successfully completed. The ITS is a cylindrical detector made of 7 active concentric layers, divided in 2 sub-structures called Outer and Inner Barrel. The apparatus has been designed to track charged particles, produced in the LHC collisions, with a precision of few microns.
The construction of the new ALICE ITS required 3 years of work and a perfect cooperation among 35 institutions in 15 countries. The local ALICE researchers (Angela Badalà, Chiara Pinto, Giuseppe Mandaglio, Paola La Rocca, Francesco Riggi, Antonina Rosano, Antonio Trifirò) took part to this challenge, contributing to the R&D activities for the choice of the pixel chip, to the massive test of the flexible printed circuits where chips are mounted on, and finally to the cabling and first commissioning of the detector on surface. All these activities benefitted from the support of the INFN-CT technicians.
In the next months, the new ALICE ITS will be commissioned and will be ready for the new data acquisition phase that is foreseen this year at the end of September.
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