Role of lattice structure and low temperature resistivity on fast electron beam filamentation in carbon
Dance, R J and Butler, N M H and Gray, R J and MacLellan, D A and Rusby, D R and Scott, G G and Zielbauer, B and Bagnoud, V and Xu, H and Robinson, A P L and Desjarlais, M P and Neely, D and McKenna, P (2015) Role of lattice structure and low temperature resistivity on fast electron beam filamentation in carbon. Plasma Physics and Controlled Fusion, 58 (1). 014027. ISSN 0741-3335 (https://doi.org/10.1088/0741-3335/58/1/014027)
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Abstract
The influence of low temperature (eV to tens-of-eV) electrical resistivity on the onset of the filamentation instability in fast-electron transport is investigated in targets comprising of layers of ordered (diamond) and disordered (vitreous) carbon. It is shown experimentally and numerically that the thickness of the disordered carbon layer influences the degree of filamentation of the fast-electron beam. Strong filamentation is produced if the thickness is of the order of 60 μm or greater, for an electron distribution driven by a sub-picosecond, mid-1020 Wcm-2 laser pulse. It is shown that the position of the vitreous carbon layer relative to the fast-electron source (where the beam current density and background temperature are highest) does not have a strong effect because the resistive filamentation growth rate is high in disordered carbon over a wide range of temperatures up to the Spitzer regime.
ORCID iDs
Dance, R J ORCID: https://orcid.org/0000-0001-8252-5342, Butler, N M H ORCID: https://orcid.org/0000-0003-3650-5230, Gray, R J ORCID: https://orcid.org/0000-0003-0610-9595, MacLellan, D A, Rusby, D R ORCID: https://orcid.org/0000-0002-8324-729X, Scott, G G, Zielbauer, B, Bagnoud, V, Xu, H, Robinson, A P L, Desjarlais, M P, Neely, D and McKenna, P ORCID: https://orcid.org/0000-0001-8061-7091;-
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Item type: Article ID code: 55213 Dates: DateEvent13 November 2015Published14 October 2015AcceptedSubjects: Science > Physics > Plasma physics. Ionized gases Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 05 Jan 2016 14:01 Last modified: 11 Oct 2024 00:23 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/55213