Centre for Underground Physics in Pyhäsalmi or CUPP is an underground physics laboratory located in Pyhäjärvi, Finland. It occupies part of the CallioLab research and development laboratories, overseen by Callio Pyhäsalmi.
It is located in the deepest base metal mine of Europe, the Pyhäsalmi Mine and uses some of the infrastructure of the mine. The laboratory is made to study neutrino-physics and cosmic radiation, as well as other subjects that benefit from the underground laboratory's unique conditions. The reason that the laboratory is underground is because in the particle detectors, the background radiation is a problem, which can be solved by placing the laboratory underground so that the background radiation is absorbed in the rock above.
Kilde: Wikipedia.org
Ophavsret: Creative Commons 3.0
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