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U-70 (Russian: У-70) is a proton synchrotron with a final energy of 70 GeV, built in 1967 at the Institute for High Energy Physics in Protvino (near Serpukhov, Russia). The accelerator held the world record in beam energy at the time of its construction, and it still is the highest energy accelerator in Russia. In 1970, the U-70 scientists team was awarded the Lenin Prize for the development and commissioning of the synchrotron.