Studies on magnet shuffling for RHIC

Shuffling of arc dipoles is performed on realistic RHIC (Relativistic Heavy Ion Collider) lattices; Delta beta / beta , Delta X/sub p// square root beta /sub x/, and Y/sub p// square root beta /sub y/ from random a1 and b1 multipoles are reduced to acceptable levels. Even before shuffling, the contribution from the arc dipoles is less than the contribution from the insertion magnets. In the insertions, the contribution from the random b1s is removed by the independent powering of all insertion quadrupoles; the contribution of random a1s to coupling will be corrected with skew quadrupole correction elements.<>