As “top-up” injection is widely used in synchrotron radiation sources, it has become very important to suppress stored beam oscillation during beam injection. To minimize this oscillation, many methods have been proposed. A pulsed multi-pole magnet injection system is one of the promising candidates and has been studied for many years at KEK. In this article, we summarize this pulsed multi-pole magnet injection system focusing on the difference between the pulsed quadrupole magnet installed in the Photon Factory Advanced Ring and a pulsed sextupole magnet in the Photon Factory.
