Phys. Rev. ST Accel. Beams 11, 094001 (2008) [15 pages]Measuring localized nonlinear components in a circular accelerator with a nonlinear tune response matrix
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. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.11.094001
DOI:
10.1103/PhysRevSTAB.11.094001
PACS:
41.85.Lc, 29.27.Bd
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