PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRD - Cosmic Ray Direct
Observation of time evolution of cosmic ray electron and positron flux with Dark Matter Particle Explorer
J. Zang,* Y. Liu, Q. Yuan, C. Yue on behalf of the DAMPE Collaboration
*corresponding author
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Pre-published on: July 22, 2019
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In this analysis, we measure the time-dependence of the primary cosmic ray electron and positron (CRE) fluxes using over 3 years of data from the Dark Matter Particle Explorer (DAMPE). The monthly CRE fluxes show clear variabilities due to the solar modulation effect. We also investigate the short-term structures of the CRE fluxes in September, 2017 when an X level solar flare event occurred. Energy-dependent Forbush descreases have been observed. The Forbush decrease amplitude and recovery time of the CRE fluxes depend on energies, which may have interesting implication in understanding the disturbances of interplanetary environment due to solaractivities. All these results indicate that the DAMPE has a great potential to probe the interplay between particles and the heliosphere environment.
DOI: https://doi.org/10.22323/1.358.0164
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