Abstract

view Abstract Citations (5) References (8) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Magnetohydrodynamic Mode Coupling at a Large Density Jump Vasquez, Bernard J. Abstract Reflection and transmission of MHD waves when a fast wave is incident on an interface across which the density changes by a factor on the order of 100 is investigated. The gas pressure is assumed to be negligible in comparison with the pressure of a uniform magnetic field. Rather than lengthy computations of the exact reflection and transmission coefficients, the results can be approximated by the use of some simple physical concepts. That is, the transformation of the fast mode to the Alfven mode at the interface can be explained in terms of polarization matching. The transmitted wave (or reflected wave) whose electric and magnetic vectors best match the incident perturbations should carry a larger portion of the flux than the other secondary waves. Using only the continuity of the electric field, the efficiency of coupling is adequately gaged by considering how well wave's electric field matches the incident wave's electric field. This polarization matching of the electric fields is refined, and an intuitively appealing method for estimating reflection and transmission coefficients is developed. This method is accurate and much faster than an exact numerical code. Publication: The Astrophysical Journal Pub Date: June 1990 DOI: 10.1086/168877 Bibcode: 1990ApJ...356..693V Keywords: Magnetohydrodynamic Waves; Plasma Density; Wave Propagation; Wave Reflection; Electric Fields; Magnetic Fields; Polarization (Waves); Solar Corona; Plasma Physics; HYDROMAGNETICS; WAVE MOTIONS full text sources ADS |

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.