Energetic Particles Associated with a Coronal Mass Ejection Shock Interacting with a Convected Magnetic Structure

On 2020 November 30, Parker Solar Probe (PSP) was crossed by a coronal mass ejection (CME)-driven shock, which we suggest also crossing convected, isolated magnetic structure (MS) at about the same time. By analyzing PSP/FIELDS field measurements, find that leading edge of MS coincided with while its trailing edge, identified as current sheet, overtook PSP 7 minutes later. Prior to arrival flux 30 keV–3 MeV ions and electrons, measured PSP/Integrated Science Investigation Sun (ISOIS)/Energetic Particle Instrument (EPI-Lo), increased gradually, peaking time shock passage. However, during downstream energetic-ion dropped dramatically, before recovering MS. Afterwards, ion fluxes remained approximately constant within sheath region CME shock. We interpret this depletion energetic result insufficient accelerate particles MS, given moves along surface owing advection solar wind. present results from quantitative numerical model interaction an idealized supports interpretation.