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@inproceedings{keintzel:ipac2021-tupab010, author = {J. Keintzel and T. Ishibashi and H. Koiso and G. Mitsuka and A. Morita and K. Ohmi and Y. Ohnishi and H. Sugimoto and S. Terui and M. Tobiyama and R. Tomás García and R.J. Yang and D. Zhou and F. Zimmermann}, % author = {J. Keintzel and T. Ishibashi and H. Koiso and G. Mitsuka and A. Morita and K. Ohmi and others}, % author = {J. Keintzel and others}, title = {{Impact of Bunch Current on Optics Measurements in SuperKEKB}}, booktitle = {Proc. IPAC'21}, pages = {1356--1359}, eid = {TUPAB010}, language = {english}, keywords = {optics, damping, impedance, quadrupole, radiation}, 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-TUPAB010}, url = {https://jacow.org/ipac2021/papers/tupab010.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB010}, abstract = {{SuperKEKB has recently achieved the world record instantaneous luminosity of 2.8 × 10³⁴ \si{cm⁻²s⁻¹} and aims at reaching a target luminosity of about 6 × 10³⁵ \si{cm⁻²s⁻¹}. To accomplish this goal it is planned to increase beam currents up to §I{3.6}{A} and §I{2.6}{A} for the positron and the electron ring, respectively. Increasing the beam currents and, in particular, the number of leptons per bunch, can impact the optics parameters obtained by turn-by-turn measurements, such as the betatron tune or phase advance. Optics measurements performed at various bunch currents can give first indications of possible intensity dependent effects. In this paper, the effect of varying bunch current on optics measurements at SuperKEKB is explored.}}, }