Speaker
Stephen Brooks
(BNL)
Description
Fixed-field accelerators with vertical orbit excursion (VFFAs) have the interesting property that the matched beam orbit shape, circumference and optics stay constant with beam momentum. This requires magnets with a vertically exponential field $B_y=B_0 e^{ky}$ on the $x=0$ midplane. This paper presents prototype measurements of such a magnet, along with a lattice using similar magnets that would allow acceleration of electrons to 18GeV in the RHIC tunnel. The lattice uses a high phase advance cell in order to give better magnetic efficiency while still being essentially a "scaling" FFA.
Primary author
Stephen Brooks
(BNL)
