H1 is a particle detector that was part of the HERA (Hadron-Elektron-Ringanlage) collider facility located at the DESY (Deutsches Elektronen-Synchrotron) laboratory in Hamburg, Germany. HERA was notable for being the first and only collider to collide electrons or positrons with protons, allowing researchers to explore high-energy interactions between leptons and hadrons.
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