Wave-particle energy transfer directly observed in an ion cyclotron wave
Abstract
Context. 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. Aims. We present a novel approach to study wave-particle energy exchange with PSP. Methods. 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. Results. Our results suggest that the energy transfer from fields to particles on the timescale of a cyclotron period is equal to approximately 3-6% of the electromagnetic energy flux. This rate is consistent with the hypothesis that the ion cyclotron wave was locally generated in the solar wind.
Keywords
Cite
@article{arxiv.2010.15189,
title = {Wave-particle energy transfer directly observed in an ion cyclotron wave},
author = {Daniel Vech and Mihailo M. Martinovic and Kristopher G. Klein and David M. Malaspina and Trevor A. Bowen and Jenny L. Verniero and Kristoff Paulson and Thierry Dudok de Wit and Justin C. Kasper and Jia Huang and Michael L. Stevens and Anthony W. Case and Kelly Korreck and Forrest S. Mozer and Katherine A. Goodrich and Stuart D. Bale and Phyllis L. Whittlesey and Roberto Livi and Davin E. Larson and Marc Pulupa and John Bonnell and Peter Harvey and Keith Goetz and Robert MacDowall},
journal= {arXiv preprint arXiv:2010.15189},
year = {2021}
}
Comments
Accepted in Astronomy and Astrophysics