Speaker
Description
The High Energy Particle Detector 01 (HEPD-01) is one of the payloads on board of CSES-01, the China Seismo-Electromagnetic Satellite dedicated to monitoring perturbations of electromagnetic fields, plasma and charged particle fluxes induced by natural sources and artificial emitters in the near-Earth space.
It is designed to measure electrons, protons and light nuclei (up to a few hundreds of MeV) with a high energy resolution and a wide angular acceptance. It has been launched in February 2018 on a Low-Earth Orbit and an altitude of about 507 km.
In this work, the analysis on galactic helium nuclei spectra with energy >60 MeV in the period August 2018 - January 2020 will be presented. The clear particle separation of different nuclei inside the detector allows to select a pure sample of helium. This analysis technique is shown for the first time, together with the calculated flux on a semi-annual basis of HEPD-01 data and the comparison with the theoretical spectra.
Below 5 GeV, the ratio proton/helium strongly depends on the solar modulation. As the mass-to-charge ratio for these two species is different, the determination of this quantity is fundamental for the cosmic-ray propagation model in the Galaxy. The HEPD-01 galactic proton and helium spectra are compared and the result will be shown, allowing to explore an energy range where there are no recent direct measurements.
| Submitted on behalf of a Collaboration? | Yes |
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