Magnetic turbulence and energetic particle enhancements at interplanetary shocks.
Chiappetta F., Lepreti F., Laurenza M., Consolini G.
IV - Geofisica e fisica dell'ambiente
Aula 32C-1 - Mercoledì 19 h 09:00 - 13:00
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We performed a correlation analysis between the energetic proton flux and the magnetic-field turbulence at interplanetary shocks, by using $in situ$ data recorded by the LET and IMPACT/MAG instruments onboard the Stereo-A spacecraft. We selected a number of 24 shocks over the period 2009--2016 and separated those occurring during a SEP event from NO SEP events. In the case of SEP (NO SEP) events, we find a high correlation (anticorrelation) between the magnetic-field turbulence and the particle fluxes in the downstream region. We discuss results in the frame of particle acceleration processes, highlighting the role of magnetic turbulence.