ILL's renewed thermal three-axis spectrometer IN8 : A review of its first three years on duty

Abstract The primary spectrometer of ILL's thermal three-axis spectrometer IN8 has undergone a major rebuild during the last few years. We here summarise the characteristics of the new instrument and highlight its enhanced performance in terms of flexibility and luminosity. Flux measurements indicate an increase of monochromatic flux at the sample position of × 3 – × 5 depending on monochromator and wavelength as compared to the previous instrument IN8B. We also highlight the scientific impact of the instrument as well as further instrumental developments envisaged.