Author/Authors :
Schober، نويسنده , , H. and Farhi، نويسنده , , E. and Mezei، نويسنده , , F. and Allenspach، نويسنده , , P. and Andersen، نويسنده , , K. and Bentley، نويسنده , , P.M. and Christiansen، نويسنده , , P. and Cubitt، نويسنده , , B. and Heenan، نويسنده , , R.K. and Kulda، نويسنده , , J. and Langan، نويسنده , , P. and Lefmann، نويسنده , , K. and Lieutenant، نويسنده , , K. and Monkenbusch، نويسنده , , M. and Willendrup، نويسنده , , P. and ?aroun، نويسنده , , J. and Tindemans، نويسنده , , P. and Zsigmond، نويسنده , , G.، نويسنده ,
Abstract :
Long-pulse spallation sources will offer a very high time-integrated neutron flux similar to that of the best steady-state sources. Using Monte Carlo simulations we show that the exceptional source qualities translate directly into strongly enhanced instrument performance for a large class of instruments ranging from high-resolution backscattering to low-resolution small-angle scattering. The relation of the source duty cycle to the required wavelength resolution of the instrument is in this context a crucial performance indicator. Very large additional gains are achievable by properly tailoring the instrument parameters to the source characteristics and by fully exploiting modern neutron optics. In all cases investigated the long-pulse structure can be turned into an asset for the instrument design by using the known concepts of pulse shaping and frame multiplication.
Keywords :
neutron scattering , Spallation neutron sources , Instrument simulation , Monte Carlo simulation
