Scaling of the beam plasma discharge for low magnetic fields

Details Scaling of the beam plasma discharge for low magnetic fields Scaling of the beam plasma discharge for low magnetic fields

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.1627p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Feb. 1, 1986, p. 1627-1631. NASA-supported research.

Physics

7

Beam Interactions, Magnetic Fields, Plasma Density, Plasma-Particle Interactions, Scaling Laws, Threshold Currents, Bessel Functions, Plasma Currents, Plasma Frequencies, Plasma Waves, Steady State

Scientific paper

A theoretical analysis of the scaling law and the value of the threshold current for beam plasma discharge (BPD) is presented, based on the requirement for an absolute instability near the plasma frequency. It is shown that both the scaling law as well as the numerical values of Ic are consistent with the experimental data, in the low pressure regimes and for weak magnetic field experiments if the dominant particle loss mechanism is due to Bohm diffusion. The implications of the findings to electron injection in space are discussed.

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