Progress on Pulsed Multipole Injection for the MAX IV Storage Rings

• Injection into the MAX IV Storage Rings will not make use of a conventional local injection bump with dipole kickers. Instead, pulsed multipole injection will be applied. Previously, it was foreseen to use a pulsed sextupole magnet similar to what KEK had originally designed for the PF ring. But after seeing encouraging results with a prototype nonlinear kicker magnet developed for BESSY-II, pulsed multipole injection for the MAX IV storage rings was revisited. A nonlinear kicker magnet similar to the BESSY-type can be realized for both MAX IV storage rings. Such a nonlinear kicker offers a broad zero-field region around the center which does not perturb the beam, while offering a high-field region around the location of the injected beam. This paper summarizes the proposed kicker magnet design and shows beam dynamics results from multi-particle tracking studies. A comparison with the previous PSM design is also presented.

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NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

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