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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
FWHM (empty symbols) and FWTM (solid symbols) values (in mm) for each geometry, for the source at different positions along the y-axis of the , radial (a), tangential (b) and axial (c) values, at 3/8 of the center of the .