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{terui:ipac2022-wepotk050,
author = {S. Terui and H. Fukuma and Y. Funakoshi and T. Ishibashi and T. Nakamura and K. Ohmi and Y. Ohnishi and M. Tobiyama and R. Ueki},
% author = {S. Terui and H. Fukuma and Y. Funakoshi and T. Ishibashi and T. Nakamura and K. Ohmi and others},
% author = {S. Terui and others},
title = {{The Report of Machine Studies Related to the Vertical Beam Size Blow-Up in SuperKEKB LER}},
booktitle = {Proc. IPAC'22},
% booktitle = {Proc. 13th International Particle Accelerator Conference (IPAC'22)},
pages = {2169--2172},
eid = {WEPOTK050},
language = {english},
keywords = {experiment, emittance, luminosity, beam-beam-effects, coupling},
venue = {Bangkok, Thailand},
series = {International Particle Accelerator Conference},
number = {13},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {07},
year = {2022},
issn = {2673-5490},
isbn = {978-3-95450-227-1},
doi = {10.18429/JACoW-IPAC2022-WEPOTK050},
url = {https://jacow.org/ipac2022/papers/wepotk050.pdf},
abstract = {{In the Low Energy Ring (LER) for positrons in the SuperKEKB, a vertical beam size blow-up was observed when the bunch current was approximately 1 mA. If a beam size blow-up occurs, the design luminosity cannot be achieved. Therefore, beam size blow-ups must be pre-vented. According to calculations, the bunch current threshold of the Transverse Mode Coupling instability (TMCI) is 2 mA or more, and the observed value is 50% or smaller. This vertical beam size blow-up cannot be explained by ordinary TMCI. This paper shows that by analyzing factors such as beam oscillation, the cause of the vertical beam size blow-up was determined. The study results showed that the vertical beam size blow-up in the LER was caused by the oscillations of the -1 mode.}},
}