Calibration of turn-by-turn system and new testing results

This paper introduces the calibration and the sensitivity of the turn-by-turn system applied and improved on storage ring of Hefei Light Source (HLS). It pressents the results of the compare and analysis of the damping time at 200MeV and 800MeV by the data measured with the system. The causation to limit beam current accumulation is found in the injection beam monitoring. This system was not only used to measure the damping rate, β oscillation and υ change, but also to research the injecting effectiveness and beam instability. In design, the log-ratio electronics circuit with working frequency 408MHz (2×RF of HLS) was chosen to characterize machine properties of the HLS storage ring. The logAratio signal processor has properties of low noise, wide bandwidth and wide dynamic range, as we