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Persistent URL http://purl.org/net/epubs/work/32588890
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Record Id 32588890
Title Investigation of relativistic intensity laser generated hot electron dynamics via copper Kα imaging and proton acceleration
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)
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Journal Article Phys Plasmas 20, no. 12 (2013): 123112. doi:10.1063/1.4853575 2013