Bunch-by-bunch position measurement and analysis   at PLS-II

A bunch-by-bunch measurement system has been developed at Pohang Light Source II. The system consists of a four-channel button pick-up, 20   GHz sampling oscilloscope and an 800   MHz low-pass digital filter. Upon measuring a bunch-by-bunch spatio-temporal beam motion matrix over many turns, singular-value decomposition analysis is used to reveal the dominant coupled-bunch modes. The system can diagnose injection oscillations due to kicker errors and the effect of resistive-wall impedance that gives rise to instability during operation.

Source: Journal of Synchrotron Radiation - December 20, 2016 Category: Physics Authors: Lee, J. Chun, M.H. Kim, G.-J. Shin, D.-C. Kim, D.-T. Shin, S. Tags: instability bunch by bunch position research papers Source Type: research