Monte Carlo Simulation of O^+ Behavior in the Auroral Ionosphere

スポンサーリンク

概要

• 論文の詳細を見る

• Altitude profiles for O^+ ion velocity distribution functions, O^+ parallel and perpendicular temperatures, O^+ temperature anisotropy, O^+-O^+ and O^+-O collision frequencies and O^+ temperature partition coefficientsβ_‖ and β_⊥ are obtained in the auroral ionosphere (150 km-500 km). A Monte Carlo simulation was used to investigate the behavior of O^+ ions that are E × B drifting through a background of neutrals O, with the effects of O^+-O resonant charge exchange and polarization interactions as well as O^+-O^+ Coulomb collisions. We have found, for low altitudes, the effect of O^+-O^+ Coulomb collisions is negligible and, as electric field increases, O^+-O collision rate increases, therefore non-Maxwellian features of f_<O^+> appeared and becomes pronounced at large electric fields, O^+ temperature increases v_<O^+-O> increases, v_<O^+-O^+> decreases, O^+ temperature partition coefficients β_‖ decreases and β_⊥ increases. As altitude increases, the effect of O^+-O^+ Coulomb collision becomes significant, and for constant electric field, the non-Maxwellian features of O^+ distributions are reduced, T_<⊥O^+> decreases. T_<‖O^+> increases, O^+ temperature anisotropy decreases, v_<O^+-O> decreases, v_<O^+-O^+> increases with altitude and reaches its maximum at 300 km and then decreases, β_‖ increases and β_⊥ decreases. However, as E increases, the O^+-O collision frequency increases, while O^+-O^+ collision frequency decreases, β_‖ decreases, β_⊥ increases, v_<O^+-O> increases, v_<O^+-O^+> decreases. Monte Carlo simulation of the effect of O^+-O^+ Coulomb collision on the O^+ temperature partition coefficients β_‖ and β_⊥, which has not been taken into account so far, is to increase β_‖ and decreases β_⊥. We believe that the Monte Carlo calculations presented here provided the best description to date of auroral F-region O^+ velocity distributions, O^+ temperature and O^+ temperature partition coefficients β_‖ and β_⊥ in the presence of the electric field, primarily because of the self consistent handling of O^+-O^+ and O^+-O collisions.

• 社団法人日本物理学会の論文
• 2003-11-15

著者

• Issa Mazen

  Department Of Physics Faculty Of Science Al-quds University

• BARGHOUTHI Imad

  Department of Physics, Faculty of Science, Al-Quds University

• ELIAS Elias

  Department of Physics, Faculty of Science, Al-Quds University

• ABU SAMRA

  Department of Physics, Faculty of Science, Al-Quds University

• QATANANI Naji

  Department of Mathematics, Faculty of Science, Al-Quds University

• Abu Samra

  Department Of Physics Faculty Of Science Al-quds University

• Qatanani Naji

  Department Of Mathematics Faculty Of Science Al-quds University

• Barghouthi Imad

  Department Of Physics Faculty Of Science Al-quds University

• Elias Elias

  Department Of Physics Faculty Of Science Al-quds University

関連論文

• Monte Carlo Simulation of O^+ Behavior in the Auroral Ionosphere

スポンサーリンク