R&D activities of FAZIA upgrade in Korea

초록

. - The FAZIA detector is designed to identify charges and masses of fragments from heavy-ion collisions within an energy range of several tens to a hundred MeV per nucleon. One basic unit of FAZIA consists of three layers: the first two layers are Si sensors with different thicknesses of 300 mu m and 500 mu m, respectively, while the third layer is a 10 cm CsI(Tl) scintillator coupled with a photodiode detector read out. The detector signals are analyzed using digital signal processing based on the FPGAs. The current module enabled the charge identification of nuclei with Z up to 54 and the isotopic nuclei discrimination with Z up to 25 by using the Delta E-E information and the pulse shape analysis. The FAZIA upgrade project aims to extend the beam energy coverage and increase the acceptance capabilities. The Korea FAZIA team is going to develop thicker and thinner Si sensors and make the compact and versatile FEE card to meet upgrade goals. This paper describes the R&D process for the Si sensors and FEE card.