Astrophysics and Space Science

, Volume 336, Issue 1, pp 33–40

Supersonic jet formation and propagation in x-pinches

  • D. M. Haas
  • S. C. Bott
  • J. Kim
  • D. A. Mariscal
  • R. E. Madden
  • Y. Eshaq
  • U. Ueda
  • G. Collins IV
  • K. Gunasekera
  • F. N. Beg
  • J. P. Chittenden
  • N. Niasse
  • C. A. Jennings
Open Access
Original Article

DOI: 10.1007/s10509-011-0599-8

Cite this article as:
Haas, D.M., Bott, S.C., Kim, J. et al. Astrophys Space Sci (2011) 336: 33. doi:10.1007/s10509-011-0599-8

Abstract

Observations of supersonic jet propagation in low-current x-pinches are reported. X-pinches comprising of four 7.5 μm diameter tungsten wires were driven by an 80 kA, 50 ns current pulse from a compact pulser. Coronal plasma surrounding the wire cores was accelerated perpendicular to their surface due to the global J×B force, and traveled toward the axis of the x-pinch to form an axially propagating jet. These jets moved towards the electrodes and, late in time (∼150 ns), were observed to propagate well above the anode with a velocity of 3.3±0.6×104 m/s. Tungsten jets remained collimated at distances of up to 16 mm from the cross point, and an estimate of the local sound speed gives a Mach number of ∼6. This is the first demonstration that supersonic plasma jets can be produced using x-pinches with such a small, low current pulser. Experimental data compares well to three-dimensional simulations using the GORGON resistive MHD code, and possible scaling to astrophysical jets is discussed.

Keywords

X-pinch Jets Supersonic outflows 

Copyright information

© The Author(s) 2011

Authors and Affiliations

  • D. M. Haas
    • 1
  • S. C. Bott
    • 1
  • J. Kim
    • 1
  • D. A. Mariscal
    • 1
  • R. E. Madden
    • 1
  • Y. Eshaq
    • 1
  • U. Ueda
    • 1
  • G. Collins IV
    • 1
  • K. Gunasekera
    • 1
  • F. N. Beg
    • 1
  • J. P. Chittenden
    • 2
  • N. Niasse
    • 2
  • C. A. Jennings
    • 3
  1. 1.University of California San DiegoLa JollaUSA
  2. 2.Imperial College LondonLondonUK
  3. 3.Sandia National LaboratoriesAlbuquerqueUSA

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