Compact turnkey focussing neutron guide system for inelastic scattering investigations
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BRANDL, Georg, GEORGII, Robert, DUNSIGER, Sarah R., TSURKAN, Vladimir, LOIDL, Alois, ADAMS, Tim, PFLEIDERER, Christian, BONI, Peter. Compact turnkey focussing neutron guide system for inelastic scattering investigations. In: Applied Physics Letters, 2015, vol. 107, p. 0. ISSN 0003-6951. DOI: https://doi.org/10.1063/1.4938503
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Applied Physics Letters
Volumul 107 / 2015 / ISSN 0003-6951 /ISSNe 1077-3118

Compact turnkey focussing neutron guide system for inelastic scattering investigations

DOI:https://doi.org/10.1063/1.4938503

Pag. 0-0

Brandl Georg1, Georgii Robert1, Dunsiger Sarah R.1, Tsurkan Vladimir23, Loidl Alois1, Adams Tim1, Pfleiderer Christian1, Boni Peter1
 
1 Technical University Munich,
2 Institut für Physik, Universität Augsburg,
3 Institute of Applied Physics, Academy of Sciences of Moldova
 
 
Disponibil în IBN: 7 mai 2023


Rezumat

We demonstrate the performance of a compact neutron guide module which boosts the intensity in inelastic neutron scattering experiments by approximately a factor of 40. The module consists of two housings containing truly curved elliptic focussing guide elements, positioned before and after the sample. The advantage of the module lies in the ease with which it may be reproducibly mounted on a spectrometer within a few hours, on the same timescale as conventional sample environments. It is particularly well suited for samples with a volume of a few mm3, thus enabling the investigation of materials which to date would have been considered prohibitively small or samples exposed to extreme environments, where there are space constraints. We benchmark the excellent performance of the module by measurements of the structural and magnetic excitations in single crystals of model systems. In particular, we report the phonon dispersion in the simple element lead. We also determine the magnon dispersion in the spinel ZnCr2Se4 (V = 12.5 mm3), where strong magnetic diffuse scattering at low temperatures evolves into distinct helical order. 

Cuvinte-cheie
benchmarking, Dispersions, Neutron scattering, single crystals