Propeller Effect during Magnetocentrifugal Plasma Acceleration

Details Propeller Effect during Magnetocentrifugal Plasma Acceleration Propeller Effect during Magnetocentrifugal Plasma Acceleration

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001astl...27..176b&link_type=abstract

Astronomy Letters, vol. 27, p. 176-180 (2001)

Astronomy and Astrophysics

Astrophysics

1

Plasma Astrophysics, Hydrodynamics, Shock Waves

Scientific paper

We study the effect of magnetic-field axial asymmetry on the magnetocentrifugal acceleration of plasma when it flows in a source's rotating magnetosphere (propeller effect). For an axisymmetric steady plasma flow, the first corrections to the energy that arise when the source rotates slowly are proportional to Omega^4, suggesting a highly inefficient plasma acceleration. Magnetic-field axial asymmetry is shown to substantially modify the acceleration. The first corrections arise even in the first order in Omega. The plasma acceleration turns out to be considerably more efficient in a non-axisymmetric magnetic field.

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