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Towards a fluid description of directional particle flux observations

Moussas, X.; Polygiannakis, J. M.; Alevizos, A.

We propose that, whenever directional flux measurements of a population of particles (e.g. solar energetic particles, cosmic rays, solar wind plasma) of well-defined energy resolution are available, new macroscopic fluid-like quantities (namely the energy dependent analog of density, mean velocity, anisotropic pressure, temperature and heat flux) …