History of development of electronic personal dosemeters

The nuclear and accelerator facilities are now increasingly used, especially high-energy accelerators for various purposes such as nuclear physics, medical science, and engineering research. It is very important to monitor the personal dose equivalent of workers in such facilities by using a real-time personal dosemeter. As real-time personal dosemeter, the silicon semiconductor detectors are world-widely used in nuclear and accelerator facilities. We have developed the real-time personal dosemeters using GM-tube and silicon semiconductor detector from about 40 years before. This report describes the history of development of electronic personal dosemeters using at atomic power plants in Japan. (author)