EFFECT OF MAGNETIC MULTIPOLES ON THE ALBA DYNAMIC

For modern synchrotron light sources the main limitation of dynamic aperture is due to the strong chromatic sextupoles. However, small multipole errors in magnetic elements can reduce the original dynamic aperture by generating of high order resonances at the aperture boundary. For the ALBA synchrotron light source [1] a dynamic aperture in the presence of magnetic multipoles in the main magnets was simulated by tracking code [2]. Both systematic and random magnetic errors were taken into account. In this paper we report on the results of our considerations