The upgraded cold neutron triple-axis spectrometer FLEXX – enhanced capabilities by new instrumental options
1 Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany
2 Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
3 Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
4 École Polytechnique Fédérale de Lausanne, Laboratory for Quantum Magnetism, 1015 Lausanne, Switzerland
5 Paul Scherrer Institute, Laboratory for Neutron Scattering, 5232 Villigen, Switzerland
6 Center for Correlated Electron Systems, IBS, Seoul National University, Seoul 151-747, Korea
a e-mail: email@example.com
Published online: 23 January 2015
The upgrade of the cold neutron triple axis spectrometer FLEXX, a work-horse instrument for inelastic neutron scattering matching the sample environment capabilities at Helmholtz-Zentrum Berlin, has been successfully accomplished. Experiments confirmed an order of magnitude gain in flux now allowing for intensity demanding options to be fully exploited at FLEXX. In this article, we describe the layout and design of two newly available FLEXX instrument options in detail. The new Heusler analyzer gives an increase of the detected polarized neutron flux due to its superior focusing properties, significantly improving the feasibility of future polarized and neutron resonance spin echo experiments. The MultiFLEXX option provides simultaneous access to large regions in wavevector and energy space for inelastic excitations thus adding mapping capabilities to the spectrometer.
© Owned by the authors, published by EDP Sciences, 2015
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