Setup and use of the ROTAX instrument at ISIS as angle-dispersive neutron powder and texture diffractometer

The ROTAX instrument at ISIS is run as an angle-dispersive time-of-flight instrument using the JULIOS scintillation detector in forward-, 90°- and backscattering geometry; d-spacing coverage is from more than 50 Å to less than 0.2 Å. Δd/d-resolution is calculated to 3.5 × 10−3 in backscattering. Tests and examples of a multipurpose use of the neutron instrument as powder diffractometer for crystallographic and magnetic structure analysis are presented; the additional use as texture diffractometer is discussed.