17–22 May 2026
C.I.D
Europe/Zurich timezone

Study on longitudinal coupled-bunch instabilities driven by high order modes in the HALF storage ring

THP5646
21 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC5.D05: Coherent and Incoherent Instabilities Theory, Simulations, Code Development Poster session

Speaker

Tianlong He (University of Science and Technology of China)

Description

Longitudinal coupled-bunch instabilities (CBIs) driven by high-order modes (HOMs) present a potential challenge to beam stability in modern light sources. By macroparticle tracking simulations, we analyze the HOM impedance threshold across a range of parameters, including HOM frequency, strength, quality factor (Q), harmonic cavity bunch lengthening, radiation effects for the HALF storage ring, a 4th-generation synchrotron light source currently under construction.This study offers quantitative guidance for setting HOM impedance limits in the design of HALF vacuum components.

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Authors

Tianlong He (University of Science and Technology of China) Weiwei Li (University of Science and Technology of China) Xiaoyu Liu (University of Science and Technology of China) Zhenghe Bai (University of Science and Technology of China)

Presentation materials

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