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RIS citation export for WE2I3: Adaptive Feedforward Control of Closed Orbit Distortion Caused by Fast Helicity-Switching Undulators

AU  - Masaki, M.
AU  - Dewa, H.
AU  - Fujita, T.
AU  - Fukui, T.
AU  - Kubota, K.
AU  - Maesaka, H.
AU  - Soutome, K.
AU  - Sugimoto, T.
AU  - Takano, S.
AU  - Takeuchi, M.T.
AU  - Tanaka, H.
AU  - Watanabe, T.
ED  - Forck, Peter
ED  - Wawrzyniak, Adriana
ED  - Schaa, Volker R.W.
ED  - Kowalski, Grzegorz W.
ED  - Cudek, Agnieszka (SOLARIS, Kraków
TI  - Adaptive Feedforward Control of Closed Orbit Distortion Caused by Fast Helicity-Switching Undulators
J2  - Proc. of IBIC2022, Kraków, Poland, 11-15 September 2022
CY  - Kraków, Poland
T2  - International Beam Instrumentation Conference
T3  - 11
LA  - english
AB  - 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.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 374
EP  - 378
KW  - kicker
KW  - undulator
KW  - controls
KW  - experiment
KW  - storage-ring
DA  - 2022/12
PY  - 2022
SN  - 2673-5350
SN  - 978-3-95450-241-7
DO  - doi:10.18429/JACoW-IBIC2022-WE2I3
UR  - https://jacow.org/ibic2022/papers/we2i3.pdf
ER  -