Pasley, John Richard orcid.org/0000-0001-5832-8285, Wei, Mingsheng, Shipton, Erik et al. (15 more authors) (2008) Laser generated electron transport experiment in a novel wire nail target. In: Laser generated electron transport experiment in a novel wire nail target. Third International Conference on Frontiers in Plasma Physics, 05-07 Mar 2007 Lawrence Livermore National Laboratory , THA .
Abstract
The transport of high intensity (2x1020 W/cm2) laser generated relativistic electrons with a solid target has been studied in a novel geometry. The targets were 20 um diameter solid copper wires, coated with ~ 2um of titanium, with an 80 um diameter hemispherical termination. They were illuminated by an ~500fs, ~200J pulse of 1.053um laser light focused to a ~ 20um diameter spot centered on the flat face of the hemisphere. K-alpha fluorescence from the Cu and Ti regions was imaged together with extreme ultraviolet (X-UV) emission at 68 and 256eV. Results showed a quasi exponential decline in K-alpha emission along the wire over a distance of a few hundred microns from the laser focus, consistent with bulk Ohmic inhibition of the relativistic electron transport. Weaker Ka and X-UV emission on a longer scale length showed limb brightening suggesting a transition to enhanced transport at the surface of the wire.
Metadata
Authors/Creators: |
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Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 10 Oct 2018 13:10 |
Last Modified: | 06 Dec 2023 10:06 |
Status: | Published |
Publisher: | Lawrence Livermore National Laboratory |
Refereed: | No |
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