Investigation of high field plasma dynamics in a laser-produced plasma expanding into a background gas

Author:

White Z. K.1ORCID,Xu K. G.1ORCID,Thakur S. Chakraborty2ORCID

Affiliation:

1. Mechanical and Aerospace Engineering Department, University of Alabama in Huntsville 1 , Huntsville, Alabama 35899, USA

2. Physics Department, Auburn University 2 , Auburn, Alabama 36849, USA

Abstract

This paper presents an overview of experimental results of a laser-produced plasma expanding into a background gas, immersed within a large range of highly uniform magnetic fields (of up to 3 T), that are transverse to the expanding plasma. We used intensified gated imaging to capture the expansion of the plasma across and along the magnetic field lines to observe the spatiotemporal expansion dynamics for different magnetic field strengths. We observe changes in the perpendicular and parallel dynamics of the laser-produced plasmas expansion at high magnetic field. In addition, our results have also indicated the presence of electron-ion hybrid instabilities at relatively high pressures (100 mTorr) and relatively high magnetic field strengths (2 T), in accordance with theoretical calculations.

Funder

NASA Space Technology Research Fellowship

DOE Frontiers in Plasma Science

NSF EPSCoR RII-Track-1 Cooperative Agreement

Publisher

AIP Publishing

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