Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10071/10531
Autoria: | Alves, E. P. Grismayer, T. Silveirinha, M. G. Fonseca, R. A. Silva, L. O. |
Data: | 2016 |
Título próprio: | Slow down of a globally neutral relativistic e- e+ beam shearing the vacuum |
Volume: | 58 |
Número: | 1 |
Paginação: | 014025 |
ISSN: | 0741-3335 |
DOI (Digital Object Identifier): | 10.1088/0741-3335/58/1/014025 |
Palavras-chave: | Kinetic-scale Non-contact friction Particle-in-cell Plasma instabilities Sheared flows |
Resumo: | The microphysics of relativistic collisionless shear flows is investigated in a configuration consisting of a globally neutral, relativistic ee+ beam streaming through a hollow plasma/dielectric channel. We show through multidimensional particle-in-cell simulations that this scenario excites the mushroom instability (MI), a transverse shear instability on the electronscale, when there is no overlap (no contact) between the e+ beam and the walls of the hollow plasma channel. The onset of the MI leads to the conversion of the beams kinetic energy into magnetic (and electric) field energy, effectively slowing down a globally neutral body in the absence of contact. The collisionless shear physics explored in this configuration may operate in astrophysical environments, particularly in highly relativistic and supersonic settings where macroscopic shear processes are stable. |
Arbitragem científica: | yes |
Acesso: | Acesso Aberto |
Aparece nas coleções: | CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1506_08715.pdf | Pós-print | 2,28 MB | Adobe PDF | Ver/Abrir |
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