Laboratory Modeling of Radiatively Cooled Jets Using Conical Wire Array Z-pinches

Details Laboratory Modeling of Radiatively Cooled Jets Using Conical Wire Array Z-pinches Laboratory Modeling of Radiatively Cooled Jets Using Conical Wire Array Z-pinches

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..703..443a&link_type=abstract

PLASMAS IN THE LABORATORY AND IN THE UNIVERSE: New Insights and New Challenges. AIP Conference Proceedings, Volume 703, pp. 443

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4

Wire Array Z-Pinches, Plasma Dynamics And Flow, Planetary Nebulae, Magnetohydrodynamics And Plasmas

Scientific paper

We present the results of astrophysically relevant laboratory experiments carried out on the MAGPIE pulsed power facility. Collimated, radiatively cooled outflows are observed in a number of astrophysical situations including Young Stellar Objects and Planetary Nebulae. To model these jets, highly supersonic (Mach number 20-30), radiatively cooled plasma jets are produced using conically convergent flows obtained by applying a fast rising current to a conical arrangement of fine metallic wires. Methods of varying the jet cooling length, the density contrast between jet and surrounding material and the angular momentum of the jet have been developed. We have also been able to model other observed jet features such as the deflection of jets by a side wind. Such a mechanism has been proposed to explain observations where bipolar jets are both curved in the same direction, producing a C-shaped symmetry. The laboratory jets are significantly deflected without loss of collimation by the ram pressure from a photoionised CH wind. A new wire array design that produces a bubble, which launches a fast, short-lived jet or projectile, is also described.

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