Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
220 0 |
SM ISO690:2012 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 | ||||||
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DOI:https://doi.org/10.1063/1.4938503 | ||||||
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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. |
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Cuvinte-cheie benchmarking, Dispersions, Neutron scattering, single crystals |
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