“…It was discovered independently at the SPS proton synchrotron at CERN (Bossart et al, 1979(Bossart et al, , 1981 and the Tomsk electron synchrotron "Sirius" (Nikitin et al, 1980(Nikitin et al, , 1981. Notice that the physics of edge radiation in proton storage rings (Coisson, 1979;Smolyakov, 1985Smolyakov, , 1986 differs essentially from that in electron storage rings (Bessonov, 1981;Chubar & Smolyakov, 1993;Bosch, 1997;Geloni et al, 2009) though some similarities in their properties can be found.…”