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TY - CONF AU - Rusnak, B. AU - Anderson, S.G. AU - Bleuel, D.L. AU - Crank, M.L. AU - Fitsos, P. AU - Gibson, D.J. AU - Hall, M. AU - Johnson, M.S. AU - Marsh, R.A. AU - Sain, J.D. AU - Souza, R. AU - Wiedrick, A. ED - Schaa, Volker RW ED - Power, Maria ED - Shiltsev, Vladimir ED - White, Marion TI - Development of a High Brightness Source for Fast Neutron Imaging* J2 - Proc. of NAPAC2016, Chicago, IL, USA, October 9-14, 2016 C1 - Chicago, IL, USA T2 - North American Particle Accelerator Conference T3 - 3 LA - english AB - Lawrence Livermore National Lab is developing an intense, high-brightness fast neutron source to create high resolution neutron radiographs and images. An intense source (10¹¹ n/s/sr at 0 degrees) of fast neutrons (10 MeV) allows: penetrating very thick, dense objects; maintaining high scintillator response efficiency; and remaining below the air activation threshold for (n,p) reactions. Fast neutrons will be produced using a pulsed 7 MeV, 300 microamp average-current commercial ion accelerator that will deliver deuterons to a 3 atmosphere deuterium gas cell. To achieve high resolution, a small (1.5 mm diameter) beam spot size will be used, and to reduce scattering from lower energy neutrons, a transmission gas cell will be used to produce a quasi-monoenergetic neutron beam. Because of the high power density of such a tightly focused, modest-energy ion beam, the gas target is a major engineering challenge that combines a 'windowless' rotating aperture, a rotary valve to meter cross-flowing high pressure gases, a novel gas beam stop, and recirculating gas compressor systems. A summary of the progress of the system design and building effort shall be presented. PB - JACoW CP - Geneva, Switzerland SP - 1260 EP - 1264 KW - ion KW - neutron KW - target KW - optics KW - linac DA - 2017/01 PY - 2017 SN - 978-3-95450-180-9 DO - 10.18429/JACoW-NAPAC2016-THB3IO01 UR - https://jacow.org/napac2016/papers/thb3io01.pdf ER -