# Nonlinear structures and anomalous transport in partially magnetized $\mathbf{E\times B}$ plasmas

## TL;DR

This paper investigates the nonlinear behavior of electron-cyclotron instability in crossed electric and magnetic fields, revealing how large amplitude waves and turbulence influence anomalous electron transport in plasmas.

## Contribution

It provides new insights into the nonlinear evolution of electron-cyclotron instability and its impact on anomalous transport in partially magnetized E×B plasmas.

## Key findings

- Development of large amplitude coherent waves driven by cyclotron resonance
- Formation of long wavelength envelope similar to modulational instability
- Anomalous electron transport dominated by long wavelength turbulent spectrum

## Abstract

Nonlinear dynamics of the electron-cyclotron instability driven by the electron $\mathbf{E\times B}$ current in crossed electric and magnetic field is studied. In nonlinear regime the instability proceeds by developing a large amplitude coherent wave driven by the energy input from the fundamental cyclotron resonance. Further evolution shows the formation of the long wavelength envelope akin to the modulational instability. Simultaneously, the ion density shows the development of high-k content responsible for wave focusing and sharp peaks on the periodic cnoidal wave structure. It is shown that the anomalous electron transport (along the direction of the applied electric field) is dominated by the long wavelength part of the turbulent spectrum.