  The effects of the electron inertia on the current sheets that are formed out
of kinetic turbulence are relevant to understand the importance of coherent
structures in turbulence and the nature of turbulence at the dissipation
scales. We investigate this problem by carrying out 3D hybrid-kinetic
Particle-in-Cell (PIC) simulations of decaying kinetic turbulence with our
CHIEF code. The main distinguishing feature of this code is an implementation
of the electron inertia without approximations. Our simulation results show
that the electron inertia plays an important role in regulating and limiting
the largest values of current density in both real and wavenumber Fourier
space, in particular near and, unexpectedly, even above electron scales. In
addition, the electric field associated to the electron inertia dominates most
of the strongest current sheets. The electron inertia is thus important to
accurately describe the properties of current sheets formed in turbulence at
electron scales.

Plasma Physics;Solar and Stellar Astrophysics;Space Physics