Centre for Underground Physics in Pyhäsalmi, Physics research center in Pyhäjärvi, Finland
The Centre for Underground Physics is a research facility housed within the Pyhäsalmi Mine at depths reaching approximately 1,400 meters below the surface. Laboratory spaces at different levels conduct experiments shielded from interference that occurs above ground.
The facility started in 2000 as the CUPP project and later became part of Callio Lab, which expanded its operations in 2015. This evolution allowed a wider range of scientific work to develop underground.
Scientists from Finnish universities and international institutions collaborate on projects studying neutrinos, cosmic radiation, geology, and biological processes.
The underground location provides ideal conditions for measurements that would be affected by cosmic radiation if conducted at the surface. The depth protects sensitive instruments and allows for very precise observations.
The EMMA installation measures cosmic rays at just 75 meters depth, while other experiments are located much deeper in the mine. This arrangement allows researchers to compare results from different radiation environments at the same location.
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