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In the photosensor field, photomultiplier tubes (or PMT) are known to have particularly high sensitivity. PMT also have dozens of other advantages such as high-speed response time. PMT are the subject of recent wide attention because of their use to detect neutrinos by Professor M. Koshiba who received the Nobel Prize in Physics in October 2002. Currently, PMT use is growing in a diverse range of fields where highly precise photometric capabilities are required. In the medical field, the PMT is used in clinical examination equipment as well as nuclear medical imaging and diagnostic systems. In fields involving chemical analysis, the PMT is used in various types of analytical instruments including spectrophotometers, environmental measurement equipment, etc. In academic research fields, the PMT is used in high energy physics experiments. In the measurement and industry field, the PMT is used, for example, in oil well logging and radiometry; and in the optical field is used for laser scanning confocal microscopy (LSCM). The PMT is also widely used in the semiconductor field for wafer surface inspection, plasma process monitoring, and thickness measurement. |
