Simulations of Astrophysical Jets with Laboratory Jets Produced by Laser-Driven Hollow Cones and Wedges

Details Simulations of Astrophysical Jets with Laboratory Jets Produced by Laser-Driven Hollow Cones and Wedges Simulations of Astrophysical Jets with Laboratory Jets Produced by Laser-Driven Hollow Cones and Wedges

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..dppfo1014g&link_type=abstract

American Physical Society, 45th Annual Meeting of the Division of Plasma Physics, October 27-31, 2003, Albuquerque, New Mexico,

Physics

Plasma Physics

Scientific paper

Jet-like structures have been observed in the remnants of supernovae, such as the radio image of SNR W50 and in x-ray imagery of the Vela pulsar. Recent theories and calculations imply that the jet-structures are not secondary by-products of supernovae explosions, but rather play a principal role in the disassembly of exploding stars. It is believed that two jets formed during a star's collapse expand in opposite directions from its interior, and that their interaction with star-matter causes the star to explode. Another area where jets are also believed to play a role is in star-forming accretion disks where jets are thought to be a mechanism for removing rotational energy. To validate theories of astrophysical jets described above we are performing experiments that simulate the interaction of plasma jets with stellar and interstellar matter. In these experiments a cumulative jet is produced by the collapse of a hollow cone illuminated on its outer surface by a pulsed laser. The jet is then allowed to interact with low density foam or a gas that simulates stellar or interstellar matter. For proper scaling it is necessary that the mach number of the laboratory jet, relative to its internal sound speed, be about 10 and that the jet to ambient gas density ratio is more than 1. Such parameters are readily achieved. Results of recent experiments and calculations will be presented.

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