14 May 2015 Laser generation of ultra-short neutron bursts from high atomic number converters
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At the Texas Petawatt laser facility we developed a novel ultra-short pulsed laser-driven neutron source generating an unprecedented output peak flux. Our results show a dramatic onset of high-energy electron generation from petawatt laser-irradiated plastic targets for targets thinner than a few microns. In this regime, the copious amounts of multi-MeV electrons emitted from the target are utilized to generate photo-neutrons from a metal converter. The neutrons are generated with a <50 ps pulse duration and a flux of 1018 n/cm2/s, exceeding any other pulsed or CW neutron source. In this paper, we will report on our measurement of the neutron yields produced from high atomic number converters.
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I. Pomerantz, I. Pomerantz, E. McCary, E. McCary, A. R. Meadows, A. R. Meadows, A. Arefiev, A. Arefiev, A. C. Bernstein, A. C. Bernstein, C. Chester, C. Chester, J. Cortez, J. Cortez, M. E. Donovan, M. E. Donovan, G. Dyer, G. Dyer, E. W. Gaul, E. W. Gaul, D. Hamilton, D. Hamilton, D. Kuk, D. Kuk, A. C. Lestrade, A. C. Lestrade, C. Wang, C. Wang, T. Ditmire, T. Ditmire, B. M. Hegelich, B. M. Hegelich, } "Laser generation of ultra-short neutron bursts from high atomic number converters", Proc. SPIE 9514, Laser Acceleration of Electrons, Protons, and Ions III; and Medical Applications of Laser-Generated Beams of Particles III, 95140Q (14 May 2015); doi: 10.1117/12.2181494; https://doi.org/10.1117/12.2181494

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