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Title: Magnetic field generation in core-sheath jets via the kinetic Kelvin-Helmholtz instability

We have investigated magnetic field generation in velocity shears via the kinetic Kelvin-Helmholtz instability (kKHI) using a relativistic plasma jet core and stationary plasma sheath. Our three-dimensional particle-in-cell simulations consider plasma jet cores with Lorentz factors of 1.5, 5, and 15 for both electron-proton and electron-positron plasmas. For electron-proton plasmas, we find generation of strong large-scale DC currents and magnetic fields that extend over the entire shear surface and reach thicknesses of a few tens of electron skin depths. For electron-positron plasmas, we find generation of alternating currents and magnetic fields. Jet and sheath plasmas are accelerated across the shear surface in the strong magnetic fields generated by the kKHI. The mixing of jet and sheath plasmas generates a transverse structure similar to that produced by the Weibel instability.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11]
  1. Department of Physics, University of Alabama in Huntsville, ZP12, Huntsville, AL 35899 (United States)
  2. Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, AL 35487 (United States)
  3. Institute of Space Science, Atomistilor 409, Bucharest-Magurele RO-077125 (Romania)
  4. Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342 Kraków (Poland)
  5. Department of Physics and Astronomy, University of Kansas, KS 66045 (United States)
  6. Institute of Astronomy, National Tsing-Hua University, Hsinchu, Taiwan 30013 (China)
  7. Department of Physics and Astronomy, University of Gent, Proeftuinstraat 86 B-9000, Gent (Belgium)
  8. LUTH, Observatore de Paris-Meudon, 5 place Jules Jansen, F-92195 Meudon Cedex (France)
  9. Department of Physics, University of Nevada, Las Vegas, NV 89154 (United States)
  10. Institut fur Physik und Astronomie, Universität Potsdam, D-14476 Potsdam-Golm (Germany)
  11. Department of Physics and Astronomy, Clemson University, Clemson, SC 29634 (United States)
Publication Date:
OSTI Identifier:
22364994
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 793; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; ALTERNATING CURRENT; HELMHOLTZ INSTABILITY; LORENTZ INVARIANCE; MAGNETIC FIELDS; MIXING; PLASMA JETS; PLASMA SHEATH; RELATIVISTIC PLASMA; RELATIVISTIC RANGE; SIMULATION; STARS; SURFACES; THICKNESS; THREE-DIMENSIONAL CALCULATIONS