Physics – Plasma Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dppdp1020b&link_type=abstract
American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congre
Physics
Plasma Physics
Scientific paper
We describe a new cyclotron maser type instability driven by a crescent or horseshaped electron distribution function. Such distribution functions are easily created by an electron beam moving into a stronger magnetic field region, where conservation of the first adiabatic invariant causes an increase in their pitch angle. This produces a broad region on the distribution function where partial f_e/partial v_⊥ > 0. Machines, planetary and pulsar dipole magnetic fields are examples of where these types of distributions can be found. We examine the stability of these electron horseshoe distribution functions for right-hand extraordinary mode (R-X mode) radiation close to the electron cyclotron frequency propagaing perpendicular to the magnetic field using both non-relativistic and relativistic beams. We will present analytical and 3-D particle in cell simulation.
Bingham Robert
Cairns Alan
Dawson John
Tonge John
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