Numerical study of the upstream wave excitation mechanism: 1. Nonlinear phase bunching of beam ions
By means of the particle simulation, we study the excitation mechanism of low frequency (0.01-0.05Hz) upstream hydromagnetic waves. Initially, we observe excitation of the right-hand polarized waves propagating parallel to the field-aligned ion beam, which is given as the free energy source. In the...
| Main Authors: | , |
|---|---|
| Format: | Report |
| Language: | English |
| Published: |
Institute of Space and Astronautical Science/Institute of Space and Astronautical Science
1985
|
| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1769 http://id.nii.ac.jp/1291/00001769/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1769&item_no=1&attribute_id=18&file_no=1 |
| Summary: | By means of the particle simulation, we study the excitation mechanism of low frequency (0.01-0.05Hz) upstream hydromagnetic waves. Initially, we observe excitation of the right-hand polarized waves propagating parallel to the field-aligned ion beam, which is given as the free energy source. In the nonlinear stage, we observed the phase space bunching of beam ions by the excited waves. We apply this bunching effect to the explanation of 'gyrophased bunched' ions observed in the foreshock region. |
|---|