Progress of ENDA and Hybrid Detection of Cosmic Ray by Using ENDA and LHAASO
August 22, 2023
By accurate measurement of components and energy spectrum in the knee region, problem of origin of galactic cosmic ray can be solved. Hadrons are the “skeleton” of extensive air shower (EAS) and possess favorable information concerning the cosmic ray components and energy. The electron-neutron detector (EN-detector) can detect both electrons and thermal neutrons generated by EAS hadrons in surrounding matter. The electron-neutron detector array (ENDA) was proposed to be added into Large High Altitude Air Shower Observatory (LHAASO) to improve its capability of EAS hybrid detection. One cluster (16 detectors) of ENDA (ENDA-HZS-16) has been operated at LHAASO (4410 m a.s.l.) for three years. In spring of this year (2023), ENDA will be extended to 64 EN-detectors (ENDA-HZS-64). In this report, we will describe installation and running status of ENDA-HZS-64 and present analysis results of hybrid detection of cosmic ray by using ENDA and LHAASO.
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