標題: | Active and passive compensation of APPLE II-introduced multipole errors through beam-based measurement |
作者: | Chung, Ting-Yi Huang, Szu-Jung Fu, Huang-Wen Chang, Ho-Ping Chang, Cheng-Hsiang Hwang, Ching-Shiang 電子物理學系 Department of Electrophysics |
關鍵字: | APPLE II;EPU;Dynamic multipole;Coupling;Skew quadrupole |
公開日期: | 1-八月-2016 |
摘要: | The effect of an APPLE II-type elliptically polarized undulator (EPU) on the beam dynamics were investigated using active and passive methods. To reduce the tune shift and improve the injection efficiency, dynamic multipole errors were compensated using L-shaped iron shims, which resulted in stable top-up operation for a minimum gap. The skew quadrupole error was compensated using a multipole corrector, which was located downstream of the EPU for minimizing betatron coupling, and it ensured the enhancement of the synchrotron radiation brightness. The investigation methods, a numerical simulation algorithm, a multipole error correction method, and the beam-based measurement results are discussed. (C) 2016 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.nima.2016.04.030 http://hdl.handle.net/11536/133717 |
ISSN: | 0168-9002 |
DOI: | 10.1016/j.nima.2016.04.030 |
期刊: | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT |
Volume: | 826 |
起始頁: | 48 |
結束頁: | 54 |
顯示於類別: | 期刊論文 |