Disk chopper time-of-flight spectrometer IN5

The disk of one of the 6 choppers

IN5 choppers are large (Ø 75 or 69 cm) and thin disks (50 to 1 mm) coated with gadolinium oxide (Gd2O3) rotating at high speed (up to 17000 rpm). Thin implied advanced aluminum metalurgy, magnetic bearings and electronic control.