Experimental Investigation of a Laboratory Plasma Source as a MHD Model for Astrophysical Jets

Details Experimental Investigation of a Laboratory Plasma Source as a MHD Model for Astrophysical Jets Experimental Investigation of a Laboratory Plasma Source as a MHD Model for Astrophysical Jets

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..dpp..3s02c&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 10-15, 1996, abstract #3S.02

Physics

Plasma Physics

Scientific paper

Astrophysical plasma jets have been observed to emanate from a wide variety of sources on extremely diverse spatial scales. Various mechanisms have been employed in an attempt to explain their formation, acceleration, collimation, and stability. Many favor Magneto-hydrodynamic (MHD) mechanisms for reasons including the observance of strong magnetic fields in the flows, the recognized ability of the MHD pinch effect to collimate plasma, and the efficiency with which rotational energy can be extracted by magnetic fields. Several theoretical models have been developed to explain the acceleration and collimation of the jets; however, to date no experimental verification of these theories exists. The CPS-1 (Coaxial Plasma Source) facility at NCSU is capable of producing high conductivity, high enthalpy magneto-flows with a variable applied magnetization. Investigation of these laboratory flows has suggested flow regime and topological similarity with astro-jets through an MHD interpretation. Recent results show that the flow from CPS-1 remains well collimated beyond seven gun radii downstream from the gun muzzle. We will present experimental results from a more extensive investigation of the collimation and stability of the CPS-1 flow. A comparison with existing theories of magnetized outflows from galactic nuclei will also be made.

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