Speaker
Description
Gas Electron Multiplier (GEM) detectors are a well-established MPGD technology in high-energy physics, offering high detection efficiency, fast signal response, excellent spatial resolution, and scalability to large active areas, making them attractive for precision imaging applications beyond high-energy physics experiments. The talk explains GEM operation, highlighting charge amplification and spatial localisation. The implementation of GEM detectors in dedicated imaging configurations is discussed, and the performance of prototype systems is evaluated using experimental data. The results demonstrate spatial resolution better than 1 mm, consistent with expectations from charge transport and diffusion in the gas. Material identification studies achieve uncertainties below 1%, demonstrating stability and uniform response. As a representative non-HEP application, preliminary results from agricultural soil imaging are presented, showing that GEM-based measurements exhibit clear sensitivity to variations in soil density and moisture content, enabling reliable differentiation of soil types and moisture conditions. These results showcase GEM detectors as versatile tools beyond fundamental high-energy physics. In particular, GEM-based soil imaging opens new opportunities for quantitative soil characterisation in agriculture, with relevance to precision farming and crop management, and illustrates how detector technologies developed for high-energy physics can evolve into robust tools for agricultural and environmental studies.
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