Novel instrumentation concepts using polarised neutrons

A new Larmor precession device, consisting of two separate precession modul es, is introduced. It operates as a high-resolution neutron diffractometer, without the need of a highly collimated beam, necessary in conventional hi gh-resolution neutron diffraction. A spin-echo mode of the same instrument, operates in different modes as an effective small-angle scattering device or accurately determines the line profile, the lattice plane orientation or the angular spread. A dramatic intensity gain in all applications discusse d can be obtained, due to the possibility to use a relaxed wavelength and a ngular resolution. (C) 2000 Elsevier Science B.V. All rights reserved.