An Investigation of the Effect of Intermittency on the Turbulent Field on Particle Acceleration in the Plasma Sheet of the Earth’s Magnetotail

Using a numerical model, the influence of intermittency on the acceleration of particles in the equatorial plane of the Earth’s magnetotail was studied. For comparison with observational data, we selected the event of July 17, 2001, when plasma flows with velocities of up to 400 km/s and an amplitude of the turbulent magnetic field of the order of 10 nT were observed in the plasma layer of the magnetotail for more than 10 min. Modeling of the electromagnetic field is carried out using a superposition of wavelets, which are distributed uniformly throughout the computational domain. By means of a special distribution of amplitudes, we ensure that the resulting field is multifractal and intermittent. It is shown that, when accelerated in an intermittent field, the energy spectra of particles rise and flatten, which means that particles are able to gain more energy than when accelerated in a turbulent plasma layer without taking into account intermittency.