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Development of a pulsed sextupole magnet system for beam injection at the Photon Factory storage ring

By: Miyajima, T.; Honda, T.; Harada, K.; Kobayashi, Y.; Nakamura, N.; Takaki, H.; Nagahashi, S.;

2007 / IEEE / 978-1-4244-0916-7

Description

This item was taken from the IEEE Conference ' Development of a pulsed sextupole magnet system for beam injection at the Photon Factory storage ring ' We have developed a pulsed sextupole magnet (PSM) system to demonstrate a new scheme of a beam injection at the Photon Factory storage ring (PF-ring) in KEK. We are going to install the PSM in this winter shutdown. Since a sextupole magnet has a characteristic of the parabolic magnetic field with no field at the magnetic center, it can give an effective kick to the injected beam at a distant position from the magnetic center and suppress effects on the stored beam at the beam injection. This enables us to inject the beam using the single PSM without a conventional pulsed local bump. The new injection scheme has a great advantage to achieve the topup injection for a synchrotron radiation light source because it is not necessary to prepare a long straight section for the pulsed local bump system. The designed PSM has a length of 0.3m, a field gradient of about 13T/m2 at a peak current of 3000A, and a pulse full width of 1.2┬┐sec in a half-sine waveform. In this paper, the current status of the development for the system is described.