The High Energy Particle Detector for the 2nd Chinese Seismo Electromagnetic Satellite

In this paper we describe the new architecture and main characteristics of the High Energy Particle Detector (HEPD-02) for the second Chinese Seismo Electromagnetic Satellite (CSES-02). We present the characteristics of the detector and electronics, highlighting the improvements with respect to HEPD-01, the first instrument currently flying on board CSES-01 launched on February 2, 2018. The two CSES satellites will form the basis for the construction of a satellite constellation planned for the future. The HEPD-02 instrument, developed by the Italian "Limadou" collaboration, consists of the following subsystems: detector, electronics, power supplies and mechanics. The detector comprises the following subsystems: a Tracker detector, a Trigger system, two Calorimeters and a Veto detector; the electronic subsystem consists of the following boards: Trigger, Tracker Data Acquisition (T-DAQ) and Data Processing and Control Unit (DPCU). HEPD-02 will be able to work in different configurations. Depending on the orbital position, in order to manage the different particle fluxes encountered in space.