Beamed neutron emission driven by laser accelerated light ions

S. Kar, A. Green, H. Ahmed, A. Alejo, A. P. L. Robinson, M. Cerchez, R. Clarke, D. Doria, S. Dorkings, J. Fernandez, S. R. Mirfayzi, P. McKenna, K. Naughton, D. Neely, P. Norreys, C. Peth, H. Powell, J. A. Ruiz, J. Swain, O. WilliM. Borghesi

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Abstract

Highly anisotropic, beam-like neutron emission with peak flux of the order of 10^9 n/sr was obtained from light nuclei reactions in a pitcher–catcher scenario, by employing MeV ions driven by subpetawatt laser. The spatial profile of the neutron beam, fully captured for the first time by employing a CR39 nuclear track detector, shows a FWHMdivergence angle of ~70 deg, 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)1Hand d(d,n)3He. Albeit insufficient cross-section data are available for modelling, the observed anisotropy in the neutrons’ spatial and spectral profiles are most likely related to the directionality and high energy of the projectile ions.
Original languageEnglish
Article number053002
Number of pages7
JournalNew Journal of Physics
Volume18
Early online date29 Apr 2016
DOIs
Publication statusPublished - May 2016

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  • Beamed neutron emission driven by laser accelerated light ions

    Kar, S. (Creator), Green, J. (Contributor), Ahmed, H. (Contributor), Alejo, A. (Contributor), Robinson, A. P. (Contributor), Cerchez, M. (Contributor), Clarke, R. J. (Contributor), Doria, D. (Contributor), Dorkings, S. (Contributor), Fernandez, J. (Contributor), Mirfayzi, S. (Contributor), McKenna, P. (Contributor), Naughton, K. (Contributor), Neely, D. (Contributor), Norreys, P. (Contributor), Peth, C. (Contributor), Powell, H. W. (Contributor), Ruiz, J. A. (Contributor), Swain, J. (Contributor), Willi, O. (Contributor) & Borghesi, M. (Contributor), Queen's University Belfast, 01 Feb 2016

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