Authors: Verniero, J. L. (NASA/GSFC), Phan, T. D. (UC Berkeley), Larson, D. (UC Berkeley), Szabo, A. (NASA/GSFC), Brosius, A. (NASA/GSFC/PSU), Livi, R. (UC Berkeley), Rahmati, A. (UC Berkeley), McManus, M.D (UC Berkeley), Romeo, O. (UC Berkeley), Whittlesey, P. L. (UC Berkeley), Paulson, K. W. (SAO), Pyakurel, P. S. (UC Berkeley), Velli, M. (UCLA), Panasenco, O. (Adv. Heliophysics Inc.), Stevens, M. (SAO), Kasper, J. (U. Michigan), Bale, S. D. (UC Berkeley), PSP SWEAP/FIELDS Team

Parker Solar Probe (PSP) is on a quest to trace the cosmic energy flow in the inner heliosphere. In situ measurements suggest that protons may play a significant role in energy transport and plasma heating. Recent evidence from Encounter 8 has shown proton beams “leaking” out of a reconnection exhaust region, originating inside the Heliospheric Current Sheet (HCS). The observed proton energy dispersion occurred at sharp shock-like exhaust edges, bounded by Alfvénic outflows. We show that in the vicinity of the shock-like region, signatures of both electron and ion-scale wave-particle interactions suggest mechanisms of cross-scale energy transfer. We explore the role of these kinetic signatures of wave-particle energy flow with the nonlinear dynamics of the HCS across generalized discontinuities in the inner heliosphere, as seen by PSP.