Expansion of a dense plasma embedded in an ambient magnetized background plasma

Details Expansion of a dense plasma embedded in an ambient magnetized background plasma Expansion of a dense plasma embedded in an ambient magnetized background plasma

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm21b0547v&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM21B-0547

Other

0654 Plasmas, 7513 Coronal Mass Ejections, 7531 Prominence Eruptions, 7831 Laboratory Studies, 7871 Waves And Instabilities

Scientific paper

The expansion of a dense (initially, nlpp/n0>>1) laser-produced plasma (lpp) into an ambient magnetized background plasma (He, Ne n=2x{10}12~cm-3, 17~meters long, 80~cm diameter, B0z=.5-1.5~kG) capable of supporting Alfvén waves has been studied in the LAPD (LArge Plasma Device). In particular, the initial diamagnetic expulsion of the background field for a supersonic expansion has been investigated using a 3-axis inductive probe. The resulting impulse to the background field and induced current profiles are mapped spatially and temporally for each case. It has been found that the presence of a background plasma allows for complex currents to be created which in turn radiate, among others, Alfvén and Lower Hybrid waves. Particle motion across and along the confining background field will be discussed. Comparison will be made to previous experimental work and to relevant astrophysical and laboratory plasmas. * Work supported by the U.S. Department of Energy and the Office of Naval Research.

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