Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2469..109h&link_type=abstract
In NASA. Marshall Space Flight Center Double Layers in Astrophysics p 109-137 (SEE N87-23313 16-88)
Astronomy and Astrophysics
Astrophysics
Collisional Plasmas, Electric Fields, Laser Plasmas, Mathematical Models, Plasma Layers, Plasma Oscillations, Thermal Conductivity, Boundary Value Problems, Damping, Electromagnetic Coupling, Plasma Density, Rotating Plasmas, Space Charge
Scientific paper
A genuine two-fluid model of plasmas with collisions permits the calculation of dynamic (not necessarily static) electric fields and double layers inside of plasmas including oscillations and damping. For the first time a macroscopic model for coupling of electromagnetic and Langmuir waves was achieved with realistic damping. Starting points were laser-produced plasmas showing very high dynamic electric fields in nonlinear force-produced cavitous and inverted double layers in agreement with experiments. Applications for any inhomogeneous plasma as in laboratory or in astrophysical plasmas can then be followed up by a transparent hydrodynamic description. Results are the rotation of plasmas in magnetic fields and a new second harmonic resonance, explanation of the measured inverted double layers, explanation of the observed density-independent, second harmonics emission from laser-produced plasmas, and a laser acceleration scheme by the very high fields of the double layers.
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