Quality assessmant of neutron delivery system for small-angle neutron scattering diffractometers of the Jülich Centre for Neutron Science at the FRM II

Radulescu, A.; Ioffe, A.; Pipich, V.

doi:10.1016/j.nima.2012.06.027

Journal Article

Quality assessmant of neutron delivery system for small-angle neutron scattering diffractometers of the Jülich Centre for Neutron Science at the FRM II

Radulescu, A.FZJ* ; Pipich, V.FZJ* ; Ioffe, A.FZJ*

2012
North-Holland Publ. Co. Amsterdam

Nuclear instruments & methods in physics research / A 689, 1 - 6 (2012) [10.1016/j.nima.2012.06.027]

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Please use a persistent id in citations: doi:10.1016/j.nima.2012.06.027

Abstract: Following the shutdown of FRJ-2 research reactor in Julich, the pinhole small-angle neutron diffractometers KWS-1 and KWS-2 have been moved to the research reactor FRM II in Garching. The installation of these 40 m long instruments required the design and setup of new neutron guides with geometrical and optical features imposed by the instruments' positioning in the neutron guide hall, such as, the predetermined length and beam height as well as the foreseen improvement of the instrument performance. We report here about the quality assessment of the newly constructed neutron guides with respect to the optical, geometrical and alignment characteristics and the positioning of the velocity selector integrated in the neutron guide system by comparing the features of the measured neutron beams (in terms of neutron flux, intensity distribution and beam profile) with the results of the simulations of optimal neutron guide systems. (C) 2012 Elsevier B.V. All rights reserved.

Keyword(s): Instrument and Method Development (1st) ; Others (1st) ; Instrument and Method Development (2nd) ; J ; Neutron guide (auto) ; Small-angle neutron scattering (auto) ; Monte-Carlo simulations (auto)