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|Title:||Monte Carlo Simulations of the SANS Instrument in Petten|
|Authors:||UCA OKDAY; OHMS CARSTEN|
|Citation:||PHYSICA B-CONDENSED MATTER vol. 403 no. 21-22 p. 3892-3895|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||The small-angle neutron-scattering facility at the 45MW high-flux reactor in Petten, The Netherlands, was constructed in the late 1980s. It has a q-range of 5 x 103 to 0.4A° 1, operating at a fixed wavelength of 4.75A° , which is realized by six pairs of double pyrolytic graphite monochromators. In this paper, we study the flux gain for the instrument installed at a neutron guide by Monte Carlo simulations using the program packages McStas [L. Lefmann, K. Nielsen, Neutron News 10 (1999) 320; P. Willendrup, E. Farhi and K. Lefmann, Physica B 350 (2004) 735] and Vitess [G. Zsigmond et al., Nucl. Instrum. Methods A 529 (2004) 218; http://www.hmi.de/projects/ess/vitess/]. In doing so, the instrument is relocated from its current position to the HB10 radial beam tube, the double monochromator is replaced by a velocity selector and neutron guides are used for transporting the neutrons.|
|JRC Directorate:||Energy, Transport and Climate|
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