Investigation of plasma waves produced in the lower hybrid frequency range by charged space objects

A two-dimensional hybrid plasma simulation model is discussed and utilized to investigate plasma wave structures in the lower hybrid frequency range produced by charged space objects. A background magnetic field is considered nearly perpendicular to the simulation plane that contains the moving space object. Such an orientation allows for lower hybrid and oblique ion acoustic waves near the lower hybrid frequency. Initial results of the model predict creation of shear-driven waves trailing the object that are in the lower hybrid frequency range, depending on the charging dynamics of the object for higher Mach numbers M=5. Also, for the magnetic field at small angles off perpendicular to the simulation plane (and object velocity), results indicate that plasma structures associated with both lower hybrid and oblique ion acoustic modes may exist that trail the object. For lower Mach numbers M≈1.7, precursor plasma structures propagating in front of the object moving at relative speeds near the ion sound speed are observed. The results may have application to plasma structures in the vicinity of orbital space debris.