12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room F(201/202/203/204)

[GA138] The front-end board for the Cherenkov Telescopes of the LHAASO project


  • Silvia VERNETTO

Primary authors


The LHAASO (Large High Altitude Air Shower Observatory) experiment is currently under construction in the Haizishan (Lakes’ Mountain) site, Sichuan province, PR China, at 4400 m a.s.l. (29,36° N, 100,14° E, 600 g/cm^2 atmospheric depth). Its main physical goals are the study of the high energy spectrum tail for both ϒ-rays (in the 100 GeV - 1 PeV range, opening for the first time the 100 -1000 TeV range to the direct observation of the high energy CR sources) and charged particles (in the unprecedented wide energy range 10^11 - 10^18 eV). This task will be achieved by means of different detectors, including a large area full coverage water Cherenkov pool (80,000 m^2), a sampling detector for electrons and muons (1 km^2) and an array of 12 large field of view (16°x16°) Imaging Atmospheric Cherenkov Telescopes (IACTs). Unlike the usual IACTs dedicated mainly to ϒ-astronomy, these telescopes will be devoted to the study of the spectrum and composition of the cosmic rays around the “knee” of the primary spectrum, and in particular to the bending features of the different chemical components. A preliminary test done at the ARGO-YBJ site using a prototype of this kind of telescopes has led to the discovery of the light elements (H+He) bending at about 700 TeV, well below the all particle “knee” at 2-3 PeV. The focal plane of these telescopes being made of SiPMs, a dedicated front-end electronics must be designed with the needed amplification and bandwidth features to achieve the required wide dynamic range of 10-32,000 photoelectrons. In this paper, the electronic scheme and the components selection are presented and discussed, together with the physics involvements in terms of achievable results.