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Persistent URL
http://purl.org/net/epubs/work/32588890
Record Status
Checked
Record Id
32588890
Title
Investigation of relativistic intensity laser generated hot electron dynamics via copper Kα imaging and proton acceleration
Contributors
L Willingale
,
AGR Thomas (Lancaster University)
,
A Maksimchuk
,
A Morace
,
T Bartal
,
J Kim
,
RB Stephens
,
MS Wei
,
FN Beg
,
K Krushelnick
Abstract
Simultaneous experimental measurements of copper Kα imaging and the maximum target normal sheath acceleration proton energies from the rear target surface are compared for various target thicknesses. For the T-cubed laser (≈4 J, 400 fs) at an intensity of ≈2 × 1019 W cm−2, the hot electron divergence is determined to be θHW HM≈22∘ using a Kα imaging diagnostic. The maximum proton energies are measured to follow the expected reduction with increasing target thickness. Numerical modeling produces copper Kα trends for both signal level and electron beam divergence that are in good agreement with the experiment. A geometric model describing the electron beam divergence reproduces the maximum proton energy trends observed from the experiment and the fast electron density and the peak electric field observed in the numerical modeling.
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Language
English (EN)
Type
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Journal Article
Phys Plasmas
20, no. 12 (2013): 123112.
doi:10.1063/1.4853575
2013
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