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000893081 1001_ $$0P:(DE-Juel1)180457$$aMa, Z.$$b0$$eCorresponding author
000893081 245__ $$aPerformance of neutron guide systems for low energy accelerator-driven neutron facilities
000893081 260__ $$aAmsterdam$$bNorth-Holland Publ. Co.$$c2021
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000893081 520__ $$aLow Energy accelerator-driven Neutron Facilities have the potential to become competitive to research reactors and spallation sources to generate neutron beams for scattering experiments. A low energy accelerator-driven neutron facility is developed at the Jülich Centre for Neutron Science. This source is expected to provide thermal and cold neutrons with high brilliance and is therefore called “High Brilliance neutron Source” (HBS). In this work, we study the performance of neutron guide systems at HBS by using neutron ray-tracing simulations. Elliptical and ballistic guides with elliptic diverging/converging section have been used in simulations for various moderator-to-guide distances and guide entrance cross-sections. Results show that the beam properties have a strong dependence on the distance between guide entry and moderator. We demonstrate that the ballistic guide system can achieve a comparable neutron flux and brilliance transfer as the true elliptical guide for thermal neutrons if a proper distance between guide entrance and moderator is chosen. For low-divergence cold neutrons, the selected ballistic guide is showing even better performance than the elliptical one
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000893081 7001_ $$0P:(DE-Juel1)178839$$aLieutenant, K.$$b1
000893081 7001_ $$0P:(DE-Juel1)131018$$aVoigt, J.$$b2
000893081 7001_ $$0P:(DE-Juel1)168124$$aGutberlet, T.$$b3
000893081 7001_ $$0P:(DE-Juel1)169262$$aFeygenson, M.$$b4
000893081 7001_ $$0P:(DE-Juel1)130572$$aBrückel, T.$$b5
000893081 773__ $$0PERI:(DE-600)1466532-3$$a10.1016/j.nima.2021.165479$$gVol. 1009, p. 165479 -$$p165479 -$$tNuclear instruments & methods in physics research / A$$v1009$$x0168-9002$$y2021
000893081 8564_ $$uhttps://juser.fz-juelich.de/record/893081/files/1-s2.0-S0168900221004642-main.pdf$$yRestricted
000893081 8564_ $$uhttps://juser.fz-juelich.de/record/893081/files/__HBS-Guide_NIMA.pdf$$yPublished on 2021-05-31. Available in OpenAccess from 2023-05-31.
000893081 8564_ $$uhttps://juser.fz-juelich.de/record/893081/files/__HBS-Guide_NIMA_revised_no_marked.pdf$$yPublished on 2021-05-31. Available in OpenAccess from 2023-05-31.
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