Global characterization of a laser-generated neutron source

D.P. Higginson, R Lelievre, L. Vassura, M.M. Gugiu, Marco Borghesi, L. Bernstein, D.L. Bleuel, B.L. Goldblum, Alexander Green, F. Hannachi, Satyabrata Kar, S. Kisyov, L. Quentin, Anna M Schroer, M. Tarisien, O. Willi, P. Antici, F. Negoita, A. Allaoua, Julien Fuchs

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Abstract

Laser-driven neutron sources are routinely produced by the interaction of laser-accelerated protons with a converter. They present complementary characteristics to those of conventional accelerator-based neutron sources (e.g. short pulse durations, enabling novel applications like radiography). We present here results from an experiment aimed at performing a global characterization of the neutrons produced using the Titan laser at the Jupiter Laser Facility (Livermore, USA), where protons were accelerated from 23μm thick plastic targets and directed onto a LiF converter to produce neutrons. For this purpose, several diagnostics were used to measure these neutron emissions, such as CR-39, activation foils, Time-of-Flight detectors and direct measurement of 7Be residual activity in the LiF converters. The use of these different, independently operating diagnostics enables comparison of the various measurements performed to provide a robust characterization. These measurements led to a neutron yield of 2.0×10^9 neutrons per shot with a modest angular dependence, close to that simulated.
Original languageEnglish
Article number905900308
Number of pages21
JournalJournal of Plasma Physics
Volume90
Issue number3
DOIs
Publication statusPublished - 03 Jun 2024

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