CERN Accelerating science

Article
Title	Impact of Bunch Current on Optics Measurements in SuperKEKB
Related title	IMPACT OF BUNCH CURRENT ON OPTICS MEASUREMENTS IN SuperKEKB
Author(s)	Keintzel, Jacqueline (CERN ; TU Vienna) ; Ishibashi, Takuya (KEK, Tsukuba) ; Koiso, Haruyo (KEK, Tsukuba) ; Mitsuka, Gaku (KEK, Tsukuba) ; Morita, Akio (KEK, Tsukuba) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Ohnishi, Yukiyoshi (KEK, Tsukuba) ; Sugimoto, Hiroshi (KEK, Tsukuba) ; Terui, Shinji (KEK, Tsukuba) ; Tobiyama, Makoto (KEK, Tsukuba) ; Tomás García, Rogelio (CERN) ; Yang, Renjun (KEK, Tsukuba) ; Zhou, Demin (KEK, Tsukuba) ; Zimmermann, Frank (CERN)
Publication	Geneva : JACoW, 2021
Number of pages	4
In:	JACoW IPAC 2021 (2021) 1356-1359
In:	12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1356-1359
DOI	10.18429/JACoW-IPAC2021-TUPAB010 (publication)
Subject category	Accelerators and Storage Rings
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.
Copyright/License	publication: © 2021 (License: CC-BY-3.0)

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