Author:
Adriani O.,Antonelli M.,Basti A.,Berti E.,Betti P.,Bigongiari G.,Bonechi L.,Bongi M.,Bonvicini V.,Bottai S.,Brogi P.,Castellini G.,Checchia C.,Casaus J.,Cui X.,Dong Y.,D'Alessandro R.,Detti S.,Giovacchini F.,Finetti N.,Maestro P.,Marrocchesi P.S.,Liu X.,Marin J.,Martinez G.,Mori N.,Pacini L.,Papini P.,Pizzolotto C.,Ricciarini S.,Spillantini P.,Starodubtsev O.,Stiaccini L.,Tang Z.,Tiberio A.,Vannuccini E.,Velasco M.,Wang R.,Wang Z.,Xu M.,Zampa G.,Zampa N.,Zhang L.
Abstract
Abstract
The measurement of cosmic-ray individual spectra provides
unique information regarding the origin and propagation of
astro-particles. Due to the limited acceptance of current space
experiments, protons and nuclei around the “knee” region
(∼ 1 PeV) can only be observed by ground based
experiments. Thanks to an innovative design, the High Energy
cosmic-Radiation Detection (HERD) facility will allow direct
observation up to this energy region: the instrument is mainly based
on a 3D segmented, isotropic and homogeneous calorimeter which
properly measures the energy of particles coming from each direction
and it will be made of about 7500 LYSO cubic crystals. The read-out
of the scintillation light is done with two independent systems: the
first one based on wave-length shifting fibers coupled to
Intensified scientific CMOS cameras, the second one is made of two
photo-diodes with different active areas connected to a custom
front-end electronics. This photo-diode system is designed to
achieve a huge dynamic range, larger than 107, while having a
small power consumption, few mW per channel. Thanks to a good
signal-to-noise ratio, the capability of a proper calibration, by
using signals of both non-interacting and showering particles, is
also guaranteed. In this paper, the current design and the
performance obtained by several tests of the photo-diode read-out
system are discussed.
Subject
Mathematical Physics,Instrumentation
Cited by
7 articles.
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