The design and q resolution of the small and wide angle neutron scattering instrument (TAIKAN) in J-PARC

The small and wide angle neutron scattering instrument (TAIKAN) is designed to cover the wide q range of 0.005 < q < 15 Å^-1 by using neutrons in the wide wavelength range of 0.5 < λ < 7.8 Å and four detector banks of small-, middle-, high-angle, and backward detector banks. The q resolution of TAIKAN was theoretically estimated to be about 5% at q = 0.1Å^-1 with the small-angle detector bank and less than 2% in the q range of q > 0.3 Å^-1 with the other banks. The q resolution was compared with the values experimentally obtained from the widths of Bragg peaks of a standard sample, silver behenate. The results of the experiment were consistent with the theory. It was confirmed that TAIKAN was completed as was expected. (author)