Work

Beam–plasma dynamics in finite-length, collisionless inhomogeneous systems

Year: 2024

Type: article

Abstract: This study investigates the streaming instability triggered by ion motion in a plasma system that is finite in length, collisionless, and inhomogeneous. Employing numerical simulations using particle-in-cell techniques and kinetic equations, the study examines how inhomogeneity emerges from integrating a cold ion beam with a background plasma within a confined system. The findings suggest that steady ion flow can modify ion sound waves through acoustic reflections from system boundaries, leading to instability. Such phenomena are known to be a hydrodynamic effect. However, there are also signatures of the beam-driven ion sound instability where kinetic resonances play a pivotal role. The main objective is to understand the impact of a finite-length system on beam–plasma instability and to identify the wave modes supported in such configurations.

Source: Physics of Plasmas

DOI: 10.1063/5.0218386

Authors: R. Mishra, R. Moulick, S. Adhikari, S. Marholm, A. J. Eklund, W. J. Miloch

Institutions: University of Oslo, Homi Bhabha National Institute, Centre of Plasma Physics - Institute for Plasma Research, Institute for Energy Technology

Language: English

Topic: Dust and Plasma Wave Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: European Commission, Universitetet i Oslo, Norges Forskningsråd, Horizon 2020 Framework Programme