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Title: Structure and Dynamics of Colliding Plasma Jets

Journal Article · · Physical Review Letters
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  1. Massachusetts Institute of Technology, Cambridge, MA (United States). Plasma Science and Fusion Center
  2. Lawrence Livermore National Laboratory, Livermore, California
  3. Lab. for Laser Energetics, Univ. of Rochester, NY (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Univ. of Michigan, Ann Arbor, MI (United States)
  6. Laboratoire pour l’Utilisation des Lasers Intenses, CNRS–CEA–Université Paris VI–Ecole Polytechnique (France)

Monoenergetic-proton radiographs of laser-generated, high-Mach-number plasma jets colliding at various angles shed light on the structures and dynamics of these collisions. The observations compare favorably with results from 2D hydrodynamic simulations of multistream plasma jets, and also with results from an analytic treatment of electron flow and magnetic field advection. In collisions of two noncollinear jets, the observed flow structure is similar to the analytic model’s prediction of a characteristic feature with a narrow structure pointing in one direction and a much thicker one pointing in the opposite direction. Spontaneous magnetic fields, largely azimuthal around the colliding jets and generated by the well-known ∇Te ×∇ne Biermann battery effect near the periphery of the laser spots, are demonstrated to be “frozen in” the plasma (due to high magnetic Reynolds number RM ~5×10⁴) and advected along the jet streamlines of the electron flow. These studies provide novel insight into the interactions and dynamics of colliding plasma jets.

Research Organization:
MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002035; FG52-07NA28059; FG03-03SF22691
OSTI ID:
1172383
Journal Information:
Physical Review Letters, Vol. 111, Issue 23; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (11)

P3: An installation for high-energy density plasma physics and ultra-high intensity laser–matter interaction at ELI-Beamlines journal July 2017
Laboratory investigation of particle acceleration and magnetic field compression in collisionless colliding fast plasma flows journal June 2019
Experimental characterization of a transition from collisionless to collisional interaction between head-on-merging supersonic plasma jetsa) journal May 2015
The influence of the Hall term on the development of magnetized laser-produced plasma jets journal April 2018
Observation of collisionless-to-collisional transition in colliding plasma jets with optical Thomson scattering journal January 2019
Anomalous plasma acceleration in colliding high-power laser-produced plasmas journal September 2019
MPRAD: A Monte Carlo and ray-tracing code for the proton radiography in high-energy-density plasma experiments journal December 2019
Modeling hydrodynamics, magnetic fields, and synthetic radiographs for high-energy-density plasma flows in shock-shear targets journal January 2020
Nuclear diagnostics for Inertial Confinement Fusion (ICF) plasmas journal January 2020
Laboratory Analog of Heavy Jets Impacting a Denser Medium in Herbig–Haro (HH) Objects journal November 2018
Anomalous plasma acceleration in colliding high-power laser-produced plasmas text January 2019

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