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Persistent URL http://purl.org/net/epubs/work/25885016
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Record Id 25885016
Title Beamed neutron emission driven by laser accelerated light ions
Abstract Highly anisotropic, beam-like neutron emission with peak flux of the order of 109 n/sr was obtained from light nuclei reactions in a pitcher–catcher scenario, by employing MeV ions driven by a sub-petawatt laser. The spatial profile of the neutron beam, fully captured for the first time by employing a CR39 nuclear track detector, shows a FWHM divergence angle of $\sim 70^\circ $, with a peak flux nearly an order of magnitude higher than the isotropic component elsewhere. The observed beamed flux of neutrons is highly favourable for a wide range of applications, and indeed for further transport and moderation to thermal energies. A systematic study employing various combinations of pitcher–catcher materials indicates the dominant reactions being d(p, n+p)1H and d(d,n)3He. Albeit insufficient cross-section data are available for modelling, the observed anisotropy in the neutrons' spatial and spectral profiles is most likely related to the directionality and high energy of the projectile ions.
Organisation CLF , CI , STFC
Funding Information EPSRC (EP/I029206/1); EPSRC (EP/J002550/1); EPSRC (EP/J003832/1); EPSRC (EP/J500094/1); EPSRC (EP/K022415/1); EPSRC (EP/L002221/1); Germany (GRK1203); Germany (SBF-TR18)
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Language English (EN)
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Journal Article New J Phys 18 (2016): 053002. doi:10.1088/1367-2630/18/5/053002 2016