Speaker
Description
The High-Energy Particle Detector (HEPD-01) is one of the scientific instruments onboard the China Seismo-Electromagnetic Satellite (CSES-01) launched in February 2018. This lightweight and compact payload measures electrons in the 3-100 MeV energy range, protons between 30 and 250 MeV, and light nuclei up to a few hundred MeV per nucleon, using a calorimeter composed of plastic scintillators and LYSO inorganic crystals. Thanks to its wide angular acceptance and the satellite’s polar orbit, HEPD-01 enables the measurement of galactic cosmic-ray spectra on a daily basis for protons.
In this work, we present the measurement of the galactic proton spectrum in the 40-250 MeV energy range and its time evolution, showing the effects of solar modulation over the entire data-taking period. Additionally, we present results of the galactic helium analysis, covering the 60-200 MeV/nucleon energy range. HEPD-01 results are compared with theoretical spectra obtained using the 2D Monte Carlo model HelMod, which simulates the solar modulation of galactic cosmic rays. With the upcoming launch of HEPD-02 onboard the second CSES satellite, we expect to extend this analysis in the near future, enabling a unique and continuous observation of low-energy galactic cosmic rays over a 10-year period and spanning two different solar cycles.
| Collaboration(s) | CSES-Limadou |
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