Generation of a Purely Electrostatic Collisionless Shock during the Expansion of a Dense Plasma through a Rarefied Medium
Data(s) |
06/07/2011
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Resumo |
A two-dimensional numerical study of the expansion of a dense plasma through a more rarefied one is reported. The electrostatic ion-acoustic shock, which is generated during the expansion, accelerates the electrons of the rarefied plasma inducing a superthermal population which reduces electron thermal anisotropy. The Weibel instability is therefore not triggered and no self-generated magnetic fields are observed, in contrast with published theoretical results dealing with plasma expansion into vacuum. The shock front develops a filamentary structure which is interpreted as the consequence of the electrostatic ion-ion instability, consistently with published analytical models and experimental results. |
Formato |
application/pdf |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.107.025003 http://pure.qub.ac.uk/ws/files/3704101/PhysRevLett.107.025003.pdf |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Sarri , G , Dieckmann , M E , Kourakis , I & Borghesi , M 2011 , ' Generation of a Purely Electrostatic Collisionless Shock during the Expansion of a Dense Plasma through a Rarefied Medium ' Physical Review Letters , vol 107 , no. 2 , 025003 . DOI: 10.1103/PhysRevLett.107.025003 |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/3100 #Physics and Astronomy(all) |
Tipo |
article |