Abstract
The SuperKEKB energy-asymmetric e\(^+\)e\(^-\) collider has now started commissioning and is working towards its design luminosity of \(8 \times 10^{35}\) cm\(^{-2}\)s\(^{-1}\). In spring 2016, SuperKEKB circulated beams in both rings during the first phase of commissioning, with the Belle II detector at the roll-out position. A dedicated array of sensors collectively called BEAST II was installed specifically to monitor and study beam background conditions. This contribution discusses the detector setup and three selected results on the improvement of the vacuum conditions due to vacuum scrubbing, a combined measurement of beam-gas and Touschek backgrounds and measurements of backgrounds related to the injection of new particles.
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References
Abe, T., et al.: Belle-II Collaboration. arXiv:1011.0352 [physics.ins-det]
‘First turns’ for SuperKEKB. http://cerncourier.com/cws/article/cern/64345. Accessed 04 Aug 2017
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Gabriel, M., on behalf of the BEAST II Collaboration. (2018). The Belle II/SuperKEKB Commissioning Detector - Results from the First Commissioning Phase. In: Liu, ZA. (eds) Proceedings of International Conference on Technology and Instrumentation in Particle Physics 2017. TIPP 2017. Springer Proceedings in Physics, vol 212. Springer, Singapore. https://doi.org/10.1007/978-981-13-1313-4_26
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DOI: https://doi.org/10.1007/978-981-13-1313-4_26
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