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dc.contributor.authorLi, Tak Chu
dc.contributor.authorHowes, Gregory G.
dc.contributor.authorKlein, Kristopher G.
dc.contributor.authorLiu, Yi-Hsin
dc.contributor.authorTenBarge, Jason M.
dc.date.accessioned2019-08-30T20:11:22Z
dc.date.available2019-08-30T20:11:22Z
dc.date.issued2019-08
dc.identifier.citationLi, T., Howes, G., Klein, K., Liu, Y., & TenBarge, J. (2019). Collisionless energy transfer in kinetic turbulence: Field–particle correlations in Fourier space. Journal of Plasma Physics, 85(4), 905850406. doi:10.1017/S0022377819000515en_US
dc.identifier.issn0022-3778
dc.identifier.doi10.1017/s0022377819000515
dc.identifier.urihttp://hdl.handle.net/10150/634029
dc.description.abstractTurbulence is commonly observed in nearly collisionless heliospheric plasmas, including the solar wind and corona and the Earth's magnetosphere. Understanding the collisionless mechanisms responsible for the energy transfer from the turbulent fluctuations to the particles is a frontier in kinetic turbulence research. Collisionless energy transfer from the turbulence to the particles can take place reversibly, resulting in non-thermal energy in the particle velocity distribution functions (VDFs) before eventual collisional thermalization is realized. Exploiting the information contained in the fluctuations in the VDFs is valuable. Here we apply a recently developed method based on VDFs, the field-particle correlation technique, to a beta = 1, solar-wind-like, low-frequency Alfvenic turbulence simulation with well-resolved phase space to identify the field-particle energy transfer in velocity space. The field-particle correlations reveal that the energy transfer, mediated by the parallel electric field, results in significant structuring of the VDF in the direction parallel to the magnetic field. Fourier modes representing the length scales between the ion and electron gyroradii show that energy transfer is resonant in nature, localized in velocity space to the Landau resonances for each Fourier mode. The energy transfer closely follows the Landau resonant velocities with varying perpendicular wavenumber k(perpendicular to) and plasma beta. This resonant signature, consistent with Landau damping, is observed in all diagnosed Fourier modes that cover the dissipation range of the simulation.en_US
dc.description.sponsorshipNSF CAREER Award [AGS-1054061]; NASA [80NSSC18K0754, 80NSSC18K0289, 80NSSC18K0643, 80NSSC18K1217, 80NSSC18K1371]; NASA HSR grant [NNX16AM23G]; NSF SHINE award [AGS-1622306]; NSF [ACI-1053575]en_US
dc.language.isoenen_US
dc.publisherCAMBRIDGE UNIV PRESSen_US
dc.rights© Cambridge University Press 2019.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectastrophysical plasmasen_US
dc.subjectplasma heatingen_US
dc.subjectspace plasma physicsen_US
dc.titleCollisionless energy transfer in kinetic turbulence: field–particle correlations in Fourier spaceen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben_US
dc.identifier.journalJOURNAL OF PLASMA PHYSICSen_US
dc.description.note6 month embargo; published online: 31 July 2019en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.volume85
dc.source.issue4


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