Solid-state nuclear track detectors (SSNTDs) have been used for the registration of charged particles practically
since the beginning of the 1960s, when a new class of detectors, called dielectric track detectors, were discovered.
The paper describes applications of the SSNTDs type PM-355 for diagnostics of fusion-reaction protons and other
ions emitted from plasma focus (PF) devices, tokamaks and laser facilities. Such detectors were also used in biomedical
experiments for beam profile measurements. The results of our calibration studies of SSNTDs as well as charged
particle- and biomedical measurements, which were carried out within different facilities, are presented