Application of the turn-by-turn beam position measurements on BEPC storage ring

This paper introduces the turn-by-turn beam position measurements on BEPC storage ring, with the bunch-by-bunch system developed by HLS. The oscillation of the beam transverse position in each turn, the motion in phase space and the transverse damping time can be acquired. With the NAFF method, we could precisely analyze the beam frequency, and furthermore, could research on the beam tune shift. In particular, the resonance phenomenon induced by chromaticity sextupoles, which occurs under special work points, is observed and analyzed.