Monte carlo code comparisons for a model instrument

Abstract Because modern neutron scattering instruments are expensive to construct, it is essential to optimize designs. Several Monte Carlo simulation codes are available for this purpose. The user community, however, is rightfully skeptical of using these codes as “black boxes,” since the code authors may be overly confident. A project is underway to compare the code results for a relatively simple well-specified instrument. This report is a continuation of the work reported at the International Conference on Neutron Scattering held in Munich from September 9–13, 2001 (unpublished).