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@inproceedings{huck:ipac2021-wepab134,
author = {M. Huck and J. Bahrdt and A. Meseck and G. Rehm and M. Ries and A. Schälicke},
title = {{Experimental Studies of the In-Vacuum-Cryogenic Undulator Effect on Beam Instabilities at BESSY II}},
booktitle = {Proc. IPAC'21},
pages = {2929--2932},
eid = {WEPAB134},
language = {english},
keywords = {undulator, vacuum, feedback, damping, impedance},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB134},
url = {https://jacow.org/ipac2021/papers/wepab134.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB134},
abstract = {{A new in-vacuum cryogenic permanent magnet undulator (CPMU17) has been installed in summer 2018 in the BESSY II storage ring at HZB. Such a small gap in-vacuum undulator device increases the impedance of the storage ring and can contribute to the instabilities that adversely affect the beam quality and the device itself. To identify and explore the effects of CPMU17 on the instabilities at BESSY II, grow-damp and drive-damp experiments have been conducted using the installed bunch-by-bunch feedback system. In this paper, the first results of the mode and gap analysis of these studies with a brief overview of other impedance studies will be presented.}},
}