Skip to Main content Skip to Navigation
Journal articles

Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence

Abstract : We perform a statistical study of the turbulent power spectrum at inertial and kinetic scales observed during the first perihelion encounter of the Parker Solar Probe. We find that often there is an extremely steep scaling range of the power spectrum just above the ion-kinetic scales, similar to prior observations at 1 A.U., with a power-law index of around −4. Based on our measurements, we demonstrate that either a significant (>50%) fraction of the total turbulent energy flux is dissipated in this range of scales, or the characteristic nonlinear interaction time of the turbulence decreases dramatically from the expectation based solely on the dispersive nature of nonlinearly interacting kinetic Alfvén waves.
Document type :
Journal articles
Complete list of metadatas

Cited literature [93 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-02923463
Contributor : Nathalie Pothier <>
Submitted on : Thursday, August 27, 2020 - 11:56:14 AM
Last modification on : Saturday, September 19, 2020 - 4:56:24 AM

File

Chen Constraining Ion-Scale 20...
Publisher files allowed on an open archive

Identifiers

Collections

Citation

T.A. Bowen, A. Mallet, S.D. Bale, J.W. Bonnell, A.W. Case, et al.. Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence. Physical Review Letters, American Physical Society, 2020, 125 (2), 8 p. ⟨10.1103/PhysRevLett.125.025102⟩. ⟨insu-02923463⟩

Share

Metrics

Record views

28

Files downloads

30