SH052-05
Wave-particle energy transfer directly observed in an ion cyclotron wave
Wednesday, 16 December 2020: 10:36
Virtual
Daniel Vech1, Mihailo Martinović2, Kristopher G. Klein3, David Malaspina4, Justin Christophe Kasper5, Jia Huang5, Michael Louis Stevens6, Kristoff W Paulson7, Anthony W Case6, Kelly E Korreck6, Trevor A Bowen8, Stuart D Bale9, Forrest Mozer10, J. L. Verniero9, Davin E Larson11, Roberto Livi12, Phyllis L Whittlesey12, Katherine Goodrich13, Marc Pulupa12, John W Bonnell13, Peter Harvey14, Thierry Dudok de Wit15, Keith Goetz16 and Robert J MacDowall17, (1)Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (2)Paris Observatory Meudon, Meudon, France, (3)University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ, United States, (4)University of Colorado, Astrophysical and Planetary Sciences Department, Boulder, CO, United States, (5)University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (6)Smithsonian Astrophysical Observatory, Cambridge, MA, United States, (7)University of New Hampshire, Durham, United States, (8)University of California Berkeley, Berkeley, CA, United States, (9)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (10)University of California, Berkeley, Berkeley, CA, United States, (11)Space Sciences Laboratory, Berkeley, CA, United States, (12)Space Sciences Laboratory, University of California Berkeley, Berkeley, CA, United States, (13)University of California, Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (14)Space Sciences Laboratory, Berkeley, United States, (15)LPC2E, CNRS and University of Orléans, Orléans, France, (16)University of Minnesota, School of Physics and Astronomy, Minneapolis, MN, United States, (17)NASA/Goddard Space Flight Center, Greenbelt, United States
Abstract:
The first studies with Parker Solar Probe (PSP) data have made significant progress toward the understanding of the fundamental properties of ion cyclotron waves in the inner heliosphere. The survey mode particle measurements of PSP, however, did not make it possible to measure the coupling between electromagnetic fields and particles on the time scale of the wave periods. In this work, we present a novel approach to study wave-particle energy exchange with PSP. We use the Flux Angle operation mode of the Solar Probe Cup in conjunction with the electric field measurements and present a case study when the Flux Angle mode measured the direct interaction of the proton velocity distribution with an ion cyclotron wave. We show that there is a remarkably good correlation between the high frequency (>0.6 Hz) fluctuations of the kinetic energy flux and Poynting flux and develop a technique to quantify the net energy flux transfer from fields to particles.
