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Ion acceleration through an auroral potential structure: Numerical simulations
 

Summary: Ion acceleration through an auroral potential structure:
Numerical simulations
A. Anastasiadis, I. A. Daglis and I. D. Kontodinas
National Observatory of Athens, Institute for Space Applications and Remote
Sensing, Penteli, GR-15236, Greece
Abstract
We perform numerical simulations for the acceleration of O+
ions in a potential
well which has an exponential form in x-direction with a characteristic length Lx.
The oxygen ions are moving in the presence of constant magnetic field Bz and a
constant electric field Ey. We trace the orbits of individual particles for different
initial conditions (phase angle and kinetic energy). We found that depending upon
the initial conditions ions can be either accelerated or decelerated. Furthermore we
perform a parametric study for the interactions of monoenergetic and Maxwellian
type of ion distributions, using random phase angle injection of the particles, with
respect to our model parameter- the characteristic length of the potential (Lx).
1 Introduction - Motivation
It is well known that ions are drifting under the action of the E B force from
the magnetotail towards Earth. During their orbit, ions are interacting with an
auroral arc, which is elongated in the east-west direction and might has a Gaussian

  

Source: Anastasiadis, Anastasios - Institute for Space Applications and Remote Sensing, National Observatory of Athens

 

Collections: Physics