2021-12-01T06:45:56Zhttps://nagoya.repo.nii.ac.jp/oaioai:nagoya.repo.nii.ac.jp:000101902021-03-01T19:34:39ZParallel electric fields in nonlinear magnetosonic wavesTakahashi, SeiichiOhsawa, YukiharuCopyright (2007) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.The electric field parallel to the magnetic field, E_||, in nonlinear magnetosonic waves is studied theoretically and numerically. In the calculation of E_|| based on the conventional reductive perturbation method, the terms related to the magnetic pressure cancel, and E_|| is proportional to the electron temperature T_e. With a modified perturbation scheme assuming that the wave amplitude is in the range (m_e/m_i)^1/2<ε<1, an expression for E_|| is obtained that is proportional to the magnetic pressure in a cold plasma. Its integral along the magnetic field, F=−∫E_||ds, is proportional to \nε^2m_iv^2_A. One-dimensional, fully kinetic, electromagnetic particle simulations verify the theoretical predictions for small-amplitude waves. Further, they demonstrate that eF becomes of the order of ε(m_iv^2_A+Γ_eT_e) in large-amplitude [ε~O(1)] oblique shock waves. These theory and simulations indicate that E_|| in magnetosonic waves can be strong in a strong magnetic field.American Institite of Physics2007-11-15engjournal articlehttp://hdl.handle.net/2237/12009https://nagoya.repo.nii.ac.jp/records/101901070-664XPHYSICS OF PLASMAS1411112305112305https://nagoya.repo.nii.ac.jp/record/10190/files/PhysPlasmas_14_112305.pdfapplication/pdf726.6 kB2018-02-20