Magnet-Sorting Algorithm for an Elliptically Polarized Undulator at TPS

Author

Ting-Yi Chung ; Sei-Da Chen ; Ching-Shiang Hwang ; Cheng-Hsing Chang ; Fu-Yuan Lin ; Jui-Che Huang ; Jyh-Chyuan Jan ; Cheng-Hsiang Chang

Author_Institution

Nat. Synchrotron Radiat. Res. Center, Hsinchu, Taiwan

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

An effective initial sorting of permanent magnets can decrease the adverse effects of magnetic inhomogeneities and the imperfect geometry of blocks on the performance of an undulator. A sorting algorithm, based on simulated annealing, for the TPS EPU is implemented. The algorithm takes into account the magnetization of the blocks and the interactions between magnets. The field quality, including multipole, phase error, and particle trajectory, was optimized to within the specified tolerance. In this paper, we describe the sorting procedure and demonstrate the optimization results.

Keywords

magnetisation; permanent magnets; simulated annealing; wigglers; TPS EPU; elliptically polarized undulator; field quality; magnet-sorting algorithm; magnetic inhomogeneities; magnetization; multipole field; optimization; particle trajectory; permanent magnets; phase error; simulated annealing; Amorphous magnetic materials; Cost function; Magnetization; Sorting; Superconducting magnets; Undulators; Inhomogeneity; magnet sorting; non unit effect; undulator;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2292941

Filename

6677534