Optimizing neutron guides: CoatingWriter

Issue title: Technical Notes from the international workshop on Neutron Delivery Systems

Article type: Research Article

Authors: Olsen, Martin A. | Bertelsen, Mads | Lefmann, Kim^{; *}

Affiliations: Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark

Correspondence: [*] Corresponding author. E-mail: lefmann@nbi.ku.dk.

Abstract: The construction price is an important parameter when designing neutron guides, but it has so far difficult to take into account during the overall optimiation. We therefore introduce the CoatingWriter add-on for the guide design tool guide_bot under McStas. This add-on allows for optimization of guide coating (m-value), taking both performance and price into account, in addition to the geometry optimization provided by guide_bot. We find that by using CoatingWriter we are able to generate good guides at significantly lower overall price levels than was possible before.

Keywords: McStas, neutron ray-tracing simulation, neutron instrumentation, neutron guides

DOI: 10.3233/JNR-180098

Journal: Journal of Neutron Research, vol. 20, no. 4, pp. 137-139, 2018