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Persistent URL http://purl.org/net/epubs/work/24095496
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Record Id 24095496
Title Measurement of the angle, temperature and flux of fast electrons emitted from intense laser–solid interactions
Abstract High-intensity laser–solid interactions generate relativistic electrons, as well as high-energy (multi-MeV) ions and x-rays. The directionality, spectra and total number of electrons that escape a target-foil is dependent on the absorption, transport and rear-side sheath conditions. Measuring the electrons escaping the target will aid in improving our understanding of these absorption processes and the rear-surface sheath fields that retard the escaping electrons and accelerate ions via the target normal sheath acceleration (TNSA) mechanism. A comprehensive Geant4 study was performed to help analyse measurements made with a wrap-around diagnostic that surrounds the target and uses differential filtering with a FUJI-film image plate detector. The contribution of secondary sources such as x-rays and protons to the measured signal have been taken into account to aid in the retrieval of the electron signal. Angular and spectral data from a high-intensity laser–solid interaction are presented and accompanied by simulations. The total number of emitted electrons has been measured as with an estimated total energy of from a Cu target with 140 J of incident laser energy during a interaction.
Organisation CLF , CI , STFC
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Language English (EN)
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Journal Article J Plasma Phys 81, no. 05 (2015): 475810505. doi:10.1017/S0022377815000835 2015