Measuring localized nonlinear components in a circular accelerator with a nonlinear tune response matrix

oleh: G. Franchetti, A. Parfenova, I. Hofmann

Format: Article
Diterbitkan: American Physical Society 2008-09-01

Deskripsi

In this paper we present a method for measuring the nonlinear errors in a circular accelerator by taking advantage of the feed-down effect of high order multipoles when the closed orbit is globally deformed. We devise a nonlinear tune response matrix in which the response to a closed orbit deformation is obtained in terms of change of machine tune and correlated with the strength of the local multipoles. A numerical example and a proof of principle experiment to validate the theoretical methods are presented and discussed.