Scaling laws for electrostatic collisionless drift instabilities

TL;DR

This paper derives scaling laws for electrostatic drift instabilities driven by ion and electron temperature gradients, applicable to collisionless plasmas in magnetic traps, aiding in understanding plasma transport.

Contribution

It introduces new scaling laws for ITG and ETG instabilities over a range of wave numbers using a local kinetic approach.

Findings

Scaling laws for instability parameters are established.

Applicable to magnetic traps with poloidal magnetic fields.

Enhances understanding of collisionless plasma transport.

Abstract

Electrostatic drift instabilities driven by ion and electron temperature gradients (ITG and ETG instabilities) are considered for the ranges of perpendicular wave number values from the inverse ion thermal gyroradius up to the electron thermal gyroradius. The analysis is carried out in the framework of the local kinetic approach. Scaling laws for instability parameters are presented. These scaling laws can be used as a basis of collisionless plasma transport rates in magnetic traps with purely poloidal magnetic field topology.