Accession Number:

ADA605143

Title:

Numerical Simulations of Collisionless Shock Formation in Merging Plasma Jet Experiments

Descriptive Note:

Conference paper

Corporate Author:

VOSS SCIENTIFIC LLC ALBUQUERQUE NM

Report Date:

2013-06-01

Pagination or Media Count:

7.0

Abstract:

In ongoing experiments at the Plasma Liner Experiment PLX facility at Los Alamos National Laboratory, two high Mach number plasma jets, composed of gases such as H and Ar, will be collided. We describe numerical simulations using particle-in-cell PIC and hybrid-PIC methods using the code LSP. Using expected experimental plasma conditions n 1014-1016 cm-3 large scale transport simulations demonstrate that the jets are essentially collisionless at the merge point. In smaller-scale 1D and 2D simulations we show that collisionless shocks are generated by the merging jets when immersed in applied magnetic fields B 0.1-1 T. Unmagnetized collisionless shocks are not found in simulations at the expected jet velocities 10-100 kms. Considerably higher velocities are required to see this effect. The orientation of the magnetic fields and the axial and transverse gradients of the jets are shown to a have strong effect on the nature of the interaction.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE