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Title: Nonthermal ion acceleration by the kink instability in nonrelativistic jets

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.5098478 · OSTI ID:1560646

We investigate the self-consistent particle acceleration physics associated with the development of the kink instability (KI) in nonrelativistic, electron-ion plasma jets. Using 3D fully kinetic particle-in-cell simulations, we show that the KI efficiently converts the initial toroidal magnetic field energy into energetic ions. The accelerated ions form a nonthermal power-law tail in the energy spectrum, containing ≃10% of the initial magnetic field energy, with the maximum ion energy extending to the confinement energy of the jet. We find that the ions are efficiently accelerated by the concerted action of the motional electric field and the highly tangled magnetic field that develop in the nonlinear phase of the KI: fast curvature drift motions of ions across magnetic field lines enable their acceleration along the electric field. We further investigate the role of Coulomb collisions in the ion acceleration efficiency and identify the collisional threshold above which nonthermal ion acceleration is suppressed. Our results reveal how energetic ions may result from unstable nonrelativistic plasma jets in space and astrophysics and provide constraints on the plasma conditions required to reproduce this acceleration mechanism in laboratory experiments.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1560646
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 26; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (36)

Weighted Particles in Coulomb Collision Simulations Based on the Theory of a Cumulative Scattering Angle journal September 1998
A binary collision model for plasma simulation with a particle code journal November 1977
Numerical methods for particle simulations at extreme densities and temperatures: Weighted particles, relativistic collisions and reduced currents journal July 2008
Scaled laboratory experiments explain the kink behaviour of the Crab Nebula jet journal October 2016
Observation of magnetic field generation via the Weibel instability in interpenetrating plasma flows journal January 2015
A laboratory plasma experiment for studying magnetic dynamics of accretion discs and jets journal August 2002
Model for straight and helical solar jets: I. Parametric studies of the magnetic field geometry journal January 2015
The role of kink instability in Poynting-flux dominated jets journal April 2006
The role of kink instability in Poynting-flux dominated jets
  • Giannios, Dimitrios
  • RECENT ADVANCES IN ASTRONOMY AND ASTROPHYSICS: 7th International Conference of the Hellenic Astronomical Society, AIP Conference Proceedings https://doi.org/10.1063/1.2348028
conference January 2006
The evolution of magnetic tower jets in the laboratory journal May 2007
Understanding disruptions in tokamaks journal May 2012
Improved modeling of relativistic collisions and collisional ionization in particle-in-cell codes journal August 2012
Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets journal January 2002
Relativistic Particle Acceleration in a Folded Current Sheet journal December 2004
Three-Dimensional Relativistic Magnetohydrodynamic Simulations of Current-Driven Instability. ii. Relaxation of Pulsar wind Nebula journal January 2011
One-to-one direct modeling of experiments and astrophysical scenarios: pushing the envelope on kinetic plasma simulations journal November 2008
A review of the dense Z -pinch journal June 2011
Observation of energetic protons trapped in laboratory magnetic-tower jets journal December 2013
Relativistic MHD simulations of core-collapse GRB jets: 3D instabilities and magnetic dissipation journal December 2015
Reconnection and particle acceleration in interacting flux ropes – II. 3D effects on test particles in magnetically dominated plasmas journal July 2017
Three-dimensional relativistic MHD simulations of active galactic nuclei jets: magnetic kink instability and Fanaroff–Riley dichotomy journal April 2016
Efficient Nonthermal Particle Acceleration by the Kink Instability in Relativistic Jets journal December 2018
Electron and Ion Energization in Relativistic Plasma Turbulence journal February 2019
Experimental Identification of the Kink Instability as a Poloidal Flux Amplification Mechanism for Coaxial Gun Spheromak Formation journal May 2003
The physics of fast Z pinches journal January 2000
Exploring astrophysics-relevant magnetohydrodynamics with pulsed-power laboratory facilities journal April 2019
Magnetic tower outflows from a radial wire array Z-pinch journal July 2005
The Origin of Ultra-High-Energy Cosmic Rays journal September 1984
3 He-rich Solar Energetic Particles in Helical Jets on the Sun journal January 2018
3 He-rich Solar Energetic Particles from Sunspot Jets journal December 2018
Relativistic MHD simulations of core-collapse GRB jets: 3D instabilities and magnetic dissipation text January 2015
Three-dimensional Relativistic MHD Simulations of Active Galactic Nuclei Jets: Magnetic Kink Instability and Fanaroff-Riley Dichotomy text January 2015
3He-Rich Solar Energetic Particles in Helical Jets on the Sun text January 2017
Electron and ion energization in relativistic plasma turbulence text January 2018
3He-Rich Solar Energetic Particles from Sunspot Jets text January 2018
Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets text January 2001

Cited By (2)

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Kink Instability: Evolution and Energy Dissipation in Relativistic Force-free Nonrotating Jets journal October 2019