Its final energy for protons, and later deuterium nuclei, was 10 GeV.
References
^Baldin, A. M.; Semenyushkin, I. N. (1977). "Twenty years of the synchrophasotron of the JINR High-Energy Physics Laboratory". Soviet Atomic Energy. 43 (6): 1146. doi:10.1007/BF01117960. S2CID98304922.