Neutron guide optimisation for monochromatic reflectometry

Issue title: 4th International Workshop on Neutron Delivery Systems, Institut Laue Langevin, Grenoble, September 28–30, 2015

Guest editors: Jérôme Beaucour

Article type: Research Article

Authors: Konik, P.^{a; b; *} | Grigoriev, S.^{a; b} | Moskvin, E.^{a; b}

Affiliations: [a] Saint Petersburg State University, Saint Petersburg, Russia | [b] Petersburg Nuclear Physics Institute, Gatchina, Russia

Correspondence: [*] Corresponding author. E-mail: [email protected].

Abstract: A combination of two optical elements: neutron guide followed by monochromator for neutron reflectometer was optimised. Several shapes of neutron guide were studied: classical, parabolic and elliptic ones. Flat or focusing monochromators considered. Guide coating and monochromator mosaicity were also varied. Calculations were made in the McStas package. The optimal combination for the maximum flux at the sample was found. For better performance an additional neutron guide after the monochromator is proposed.

Keywords: Neutron instrumentation, Monte-Carlo simulations

DOI: 10.3233/JNR-160032

Journal: Journal of Neutron Research, vol. 18, no. 4, pp. 117-126, 2015