4.4 Article

Beam injection with pulsed multipole magnet at UVSOR-III

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ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2014.07.059

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Electron storage ring; Beam injection; Storage ring

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In this study, we designed and manufactured a pulsed multipole magnet for beam injection into the UVSOR-III ring. A sextupole-like magnetic field could be excited when using the multipole magnet. To compensate for the residual field at the center of the magnet caused by manufacturing imprecisions, thin ferrite sheets were used. The injection experiments at UVSOR-III demonstrated multi-turn injections with the pulsed multipole magnet. The injection efficiency was 23% and the electron beam was stored up to the normal operation current of 300 mA. Moreover, we confirmed that oscillations of stored beams caused by beam injection were drastically suppressed compared with conventional pulsed dipole injection. (C) 2014 Elsevier B.V. All rights reserved.

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