Radial Dependence of the Magnetic Turbulence at Transition and Kinetic Range in the Inner Heliosphere - Archive ouverte HAL Access content directly
Conference Papers Year : 2020

Radial Dependence of the Magnetic Turbulence at Transition and Kinetic Range in the Inner Heliosphere

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D. Duan
  • Function : Author
T. A. Bowen
  • Function : Author
J. He
A. Mallet
  • Function : Author
S. D. Bale
  • Function : Author
J. W. Bonnell
  • Function : Author
A. W. Case
  • Function : Author
K. Goetz
J. C. Kasper
  • Function : Author
K. E. Korreck
  • Function : Author
P. Harvey
D. E. Larson
  • Function : Author
R. J. Macdowall
  • Function : Author
D. Malaspina
M. Pulupa
M. L. Stevens
  • Function : Author
P. L. Whittlesey
  • Function : Author

Abstract

Magnetohydodynamic range turbulent magnetic fluctuations in the solar wind are typically observed with a Kolmogorov spectral scaling k^(-5/3). At smaller scales, kinetic effects cause the spectrum to steepen. We present a statistical study of the kinetic-scale turbulence using measurements from the PSP/FIELDS fluxgate and search coil magnetometers in the inner heliosphere (0.16 -0.30 AU). At kinetic scales a spectrum of -8/3 is measured; however, we show that a transition range between magnetohydrodynamic and kinetic scales is commonly observed. Analysis of the radial scaling shows that the both transition and kinetic range spectrum becomes steeper and more pronounced closer to the sun.
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Dates and versions

insu-03560376 , version 1 (07-02-2022)

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D. Duan, T. A. Bowen, J. He, A. Mallet, S. D. Bale, et al.. Radial Dependence of the Magnetic Turbulence at Transition and Kinetic Range in the Inner Heliosphere. American Geophysical Union, 2020, Online, France. ⟨insu-03560376⟩
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