JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{masaki:ibic2022-we2i3,
author = {M. Masaki and H. Dewa and T. Fujita and T. Fukui and K. Kubota and H. Maesaka and K. Soutome and T. Sugimoto and S. Takano and M.T. Takeuchi and H. Tanaka and T. Watanabe},
% author = {M. Masaki and H. Dewa and T. Fujita and T. Fukui and K. Kubota and H. Maesaka and others},
% author = {M. Masaki and others},
title = {{Adaptive Feedforward Control of Closed Orbit Distortion Caused by Fast Helicity-Switching Undulators}},
& booktitle = {Proc. IBIC'22},
booktitle = {Proc. 11th Int. Beam Instrum. Conf. (IBIC'22)},
pages = {374--378},
eid = {WE2I3},
language = {english},
keywords = {kicker, undulator, controls, experiment, storage-ring},
venue = {Kraków, Poland},
series = {International Beam Instrumentation Conference},
number = {11},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {12},
year = {2022},
issn = {2673-5350},
isbn = {978-3-95450-241-7},
doi = {10.18429/JACoW-IBIC2022-WE2I3},
url = {https://jacow.org/ibic2022/papers/we2i3.pdf},
abstract = {{We developed a new correction algorithm for closed orbit distortion (COD) based on adaptive feedforward control (AFC). The AFC system effectively works for the suppression of the fast COD due to known error sources with repetitive patterns such as helicity-switching undulators. The scheme aims to counteract error sources by feedforward correctors at the position or in the vicinity of error sources so that a potential risk of unwanted local orbit bumps, which is known to exist for the global orbit feedback, can be eliminated in a reliable and accurate manner. This option is especially advantageous when an error source causes an angular distortion of photon beams such as a fast orbit distortion near undulators. Thus, the AFC provides a complementary capability to a so-called fast global orbit feedback (FOFB) for coming next-generation light sources where ultimate light source stability is essentially demanded. In this talk, introduction to the AFC, its theoretical aspect and advantages, the system overview, the experimental results for the effects of AFC will be presented.}},
}