The Backscattering Instrument MUSICAL and Test Experiments

Article type: Research Article

Authors: Dohmen, L. | Lang, M. | Martin, D. | Carlile, C.J. | Alefeld, B.

Affiliations: Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany | ISIS Facility, Rutherford Appleton Laboratory, Chilton Didcot Oxfordshire, OX11 0QX, UK

Abstract: MUSICAL represents a concept for a neutron backscattering instrument designed to be used on a pulsed neutron source. By using many crystals as monochromators, the multiplexing effect should give an intensity gain compared to a conventional single monochromator spectrometer, which is proportional to the number of crystals. A novel multiple silicon crystal is used as the monochromator. Test experiments were performed using 21 unpolished silicon crystals each separated by 4.7 cm and temperature differences δT of 10 °C or 20 °C between neighbouring crystals. As expected the resolution function has a complicated structure. The energy width is estimated to be 400 neV which is close to the best energy resolution available on current backscattering spectrometers.

DOI: 10.1080/10238169608200213

Journal: Journal of Neutron Research, vol. 5, no. 1, 2, pp. 89-96, 1996