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S.J. Brooks {stephen.brooks@stfc.ac.uk}, RAL, Chilton, OX11 0QX, UK

Abstract.

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S.J. Brooks {stephen.brooks@stfc.ac.uk}, RAL, Chilton, OX11 0QX, UK

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  1. Abstract FFAGs with vertical orbit excursion (VFFAGs) provide a promising alternative design for the magnets in fixed-field machines. They have a vertical magnetic field component that increases with height in the vertical aperture, yielding a skew quadrupole focussing structure. The end fields of such magnets with edge angles provide an alternating gradient without the need for reverse bends, thus reducing the machine circumference. Similarly to spiral scaling horizontal FFAGs (but unlike non-scaling versions), the machine has fixed tunes and no intrinsic limitation on momentum range. Rings capable of boosting the 800MeV beam from the ISIS proton synchrotron (egeom = 150mm.mrad) to 3, 5 and 12GeV using superconducting magnets are presented, the latter corresponding to 2.5MW beam power. Vertical Orbit Excursion FFAG Accelerators with Edge Focussing S.J. Brooks {stephen.brooks@stfc.ac.uk}, RAL, Chilton, OX11 0QX, UK Perspective view of the 12GeV ring. This work investigates a spiral scaling VFFAG. Right: VFFAG magnets can be made as a slot with opposing current windings on each side. Poster reference: MOPPD019

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