A review of transmission channelling using high-demagnification microprobes

Recent work on the implementation and applications of a transmission channelling facility on a high-demagnification microprobe is described. A new measurement geometry is used in which only the useful channelled protons are recorded and the large flux of nonchanneled protons, which convey little useful information, is not recorded. This results in transmission channelling images with greatly improved counting statistics with much lower statistical noise. The use of this new system to provide high-resolution, low-noise images of lattice defects such as stacking faults and misfit dislocations is demonstrated. A measurement system capable of providing transmission channelling imaging of lattice defects in real-time is described.