The formation of reverse shocks in magnetized high energy density supersonic plasma flows

  • S. V. Lebedev
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • L. Suttle
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • G. F. Swadling
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • M. Bennett
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • S. N. Bland
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • G. C. Burdiak
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • D. Burgess
    Queen Mary University of London 2 Astronomy Unit, School of Physics and Astronomy, , London E1 4NS, United Kingdom
  • J. P. Chittenden
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • A. Ciardi
    LERMA, Observatoire de Paris and École Normale Supérieure Université Pierre et Marie Curie 3 , UMR 8112 CNRS, 75231 Paris, France
  • A. Clemens
    Queen Mary University of London 2 Astronomy Unit, School of Physics and Astronomy, , London E1 4NS, United Kingdom
  • P. de Grouchy
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • G. N. Hall
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • J. D. Hare
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • N. Kalmoni
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • N. Niasse
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • S. Patankar
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • L. Sheng
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • R. A. Smith
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • F. Suzuki-Vidal
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • J. Yuan
    Blackett Laboratory 1 , Imperial College, London SW7 2BW, United Kingdom
  • A. Frank
    University of Rochester 6 Department of Physics and Astronomy, , Rochester, New York 14627, USA
  • E. G. Blackman
    University of Rochester 6 Department of Physics and Astronomy, , Rochester, New York 14627, USA
  • R. P. Drake
    University of Michigan 7 , Ann Arbor, Michigan 48109, USA

抄録

<jats:p>A new experimental platform was developed, based on the use of supersonic plasma flow from the ablation stage of an inverse wire array z-pinch, for studies of shocks in magnetized high energy density physics plasmas in a well-defined and diagnosable 1-D interaction geometry. The mechanism of flow generation ensures that the plasma flow (ReM ∼ 50, MS ∼ 5, MA ∼ 8, Vflow ≈ 100 km/s) has a frozen-in magnetic field at a level sufficient to affect shocks formed by its interaction with obstacles. It is found that in addition to the expected accumulation of stagnated plasma in a thin layer at the surface of a planar obstacle, the presence of the magnetic field leads to the formation of an additional detached density jump in the upstream plasma, at a distance of ∼c/ωpi from the obstacle. Analysis of the data obtained with Thomson scattering, interferometry, and local magnetic probes suggests that the sub-shock develops due to the pile-up of the magnetic flux advected by the plasma flow.</jats:p>

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