EGU21-3521, updated on 03 Mar 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Universal scaling of thin current sheets in space plasma

Helmi Malova1,2, Lev Zelenyi2,3, Elena Grigorenko2,3,4, Victor Popov2,4,5, and Eduard Dubinin6
Helmi Malova et al.
  • 1Moscow State University, Scobeltsyn Institute of Nuclear Physics, Moscow, Russian Federation (
  • 2Space Research Institute of the Russian Academy of Sciences, Moscow, Russian Federation
  • 3Department of Space Physics, Moscow Institute of Physics and Technology, Moscow, Russia
  • 4National Research University “Higher School of Economics”, Moscow, Russian Federation
  • 5Physical Faculty of Moscow State University, Moscow, Russian Federation
  • 6Max Planck Institute for Solar System Research, Gӧttingen, Germany

Thin current sheets (TCSs) with thicknesses about ion Larmor radii can play the key role in space; particularly they can store and then explosively release the accumulated free energy. The dynamics of ions moving along quasi-adiabatic trajectories in TCSs is different from one of magnetized electrons following guiding center drift orbits. Due to this property TCSs can be described in a frame of a hybrid approach. The thickness of the super-thin embedded electron sheet remains uncertain because of the scale-free character of magnetized electron motion. We propose a new analytical approach to describe the multilayer TCS and provide the universal expression describing the embedded electron sheet as a function of the cross-sheet transversal coordinate z characterizing TCS. We demonstrated that the unique property of the electron sheet is the nonlinear character of magnetic field profile:  B(z) ~ z 1/3 which conforms excellently with MAVEN observations in the Martian magnetotail. 

This work was supported by the Russian Science Foundation (grant # 20-42-04418).


How to cite: Malova, H., Zelenyi, L., Grigorenko, E., Popov, V., and Dubinin, E.: Universal scaling of thin current sheets in space plasma, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3521,, 2021.