WEXAT0103
IASF, Shenzhen, Guangdong, People’s Republic of China
IHEP, Beijing, People’s Republic of China
| Paper | Title | Page |
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WEXAT0103 |
Analysis of the Beam-beam Interaction including Longitudinal Impedance | |
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| In the future colliders, with extreme parameters, such as very intense beam population, low emittances, small beta functions, large Piwinski angle, the stability of beam-beam interaction is very sensitive to longitudinal dynamics. Therefore, both the beam-beam simulation and theroretical analysis should consider the longitudinal impedance in a self-consistent way. In this paper, we develop an analysis method to study the beam-beam instability with longitudinal impedance. | ||
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Slides WEXAT0103 [3.259 MB] | |
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| WEYAT0101 | Collective Effects Studies for CEPC | 141 |
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| The impedance model of the CEPC storage ring is updated according to the development of the vacuum components based on the circular beam pipe. With the impedance model, the single bunch and coupled bunch instabilities for different operation scenarios are investigated. Particularly, the key instability issues driven by the beam coupling impedance in the Z operation mode are discussed. The influence of the longitudinal impedance on the transverse mode coupling instability is analyzed both numerically and analytically. In addition, trapped ions can induce bunch centroid oscillation and emittance growth. The possibility of ion trapping and fast beam ion instability in the CEPC storage ring are also investigated. | ||
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Slides WEYAT0101 [2.856 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-eeFACT2022-WEYAT0101 | |
| About • | Received ※ 30 November 2022 — Revised ※ 03 February 2023 — Accepted ※ 08 February 2023 — Issue date ※ 09 February 2023 | |
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