HEIMDAL: A thermal neutron powder diffractometer with high and flexible resolution combined with SANS and neutron imaging – Designed for materials science studies at the European Spallation Source. - Holm, Sonja L.; Lefmann, Kim; Henry, Paul F.; Bertelsen, Mads; Schefer, Jürg; Christensen, Mogens (Nuclear Instruments & Methods in Physics Research Section A, 2016)