Abstract
Proposal on high-power supply High-Energy cosmic-Ray Observatory (HERO) is considered. It is proposed to carry out long-term (>7 years) studies of the spectrum and charge composition of PCR nuclei up to E 0 ∼ 10 16 eV , the energy spectra of electrons at E e = 10 11 – 10 13 eV and diffusive γ-rays at E γ 5 ⋅ 10 12 eV . The HERO instrument is characterized by a geometrical factor of 6.0 – 9.0 m 2 sr depending on particle type; mass of ∼ 2800 kg ; channel number of ∼ 8 ⋅ 10 5 ; power consumption of 16.5 kW. The device consists of (a) 3D image scintillator ionization calorimeter of 80-cm linear size, thickness of 22 X 0 and 2.5 λ i n t p with an absorber from lead and admixture of Gd 64 ; (b) multilayer silicon-microstrip track system; (c) multilayer silicon-pad charge detectors. Energy is measured by using (a) ionization and (b) neutron calorimetry techniques, (c) kinematics approach. The e ± / γ -initiated cascades are selected by using neutron-yield counting and cascade-shape analysis approaches.
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