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In situ evidence for the structure of the magnetic null in a 3D reconnection event in the Earth's magnetotail
Escoubet, C. P.; Balogh, A.; Glassmeier, K. H. +12 more
Magnetic reconnection is one of the most important processes in astrophysical, space and laboratory plasmas. Identifying the structure around the point at which the magnetic field lines break and subsequently reform, known as the magnetic null point, is crucial to improving our understanding of reconnection. But owing to the inherently three-dimen…
Cosmic-ray diffusion near the Bohm limit in the Cassiopeia A supernova remnant
Stage, M. D.; Allen, G. E.; Houck, J. C. +1 more
The acceleration of cosmic rays in our Galaxy by means of diffusive shock (Fermi) acceleration is believed to occur primarily in supernova remnants (SNRs). Despite considerable theoretical work, the precise details are still unknown, in part because of the difficulty in directly observing nucleons that are accelerated to TeV energies in-and affect…