Muon spin relaxation/rotation/resonance ( \(\varvec{\mu \textrm{SR}}\) ) method is one of the most effective experimental methods and has been used in many fields such as material science, chemical, and bioscience since the 1970s. For the next elevation of \(\varvec{\mu \textrm{SR}}\) , we developed positron detectors that have a spatial resolution and used them as positron trackers so that we could construct an image of a sample. Demonstrative experiments of trackers were performed at TRIUMF and an image of a sample was successfully reconstructed.
