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Ions motion effects on the full unstable spectrum in relativistic electron beam plasma interaction
ETSI Ind Univ Castilla-La Mancha.
Ruhr-University Bochum.ORCID-id: 0000-0003-4055-0552
2008 (engelsk)Inngår i: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 15, nr 1, s. 012104-1-12104-13Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A relativistic fluid model is implemented to assess the role of the ions motion in the linear phase of relativistic beam plasma electromagnetic instabilities. The all unstable wave vector spectrum is investigated, allowing us to assess how ion motions modify the competition between every possible instability. Beam densities up to the plasma one are considered. Due to the fluid approach, the temperatures must remain small, i.e., nonrelativistic. In the cold limit, ions motion affect the most unstable mode when the beam gamma factor bM/mi, being the beam to plasma density ratio, i the ion charge, M their mass, and m the electrons. The return current plays an important role by prompting Buneman-type instabilities which remain in the nonrelativistic regime up to high beam densities. Nonrelativistic temperatures only slightly affect these conclusions, except in the diluted beam regime where they can stabilize the Buneman modes.

sted, utgiver, år, opplag, sider
2008. Vol. 15, nr 1, s. 012104-1-12104-13
Emneord [en]
plasma physics
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-41000DOI: 10.1063/1.2828607Lokal ID: 54893OAI: oai:DiVA.org:liu-41000DiVA, id: diva2:261850
Tilgjengelig fra: 2009-10-10 Laget: 2009-10-10 Sist oppdatert: 2017-12-13

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Forlagets fullteksthttp://link.aip.org/link/?PHPAEN/15/012104/1

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Dieckmann, Mark E

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