166.6 MHz超导射频腔的高阶模阻尼结构

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-05 DOI:10.1016/j.nima.2025.170448

Xuerui Hao , Zhongquan Li , Pei Zhang

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引用次数: 0

摘要

第四代同步加速器光源的发展需要提高光束的稳定性。本文针对高能光子源中166.6 MHz超导腔设计了一种宽带高阶模阻尼系统，以减轻高阶模阻抗引起的耦合束不稳定性。我们的系统研究重点是通过优化的提取结构来抑制高阶模式，其中提取的高阶模式被吸收器有效地耗散，同时通过窄带滤波器确保基模保护。实验验证了该方案的可行性，显示了高阶模抑制性能的显著提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Higher-order modes damping structure for 166.6 MHz superconducting radio-frequency cavity

The development of fourth-generation synchrotron light sources necessitates enhanced beam stability. This study presents a broadband higher-order modes damping system designed for 166.6 MHz superconducting cavities in the High Energy Photon Source to mitigate coupled-bunch instabilities induced by higher-order modes impedance. Our systematic investigation focuses on higher-order modes suppression through optimized extraction structures, where extracted higher-order modes are effectively dissipated by absorbers while fundamental mode protection is ensured via narrow-band filters. Experimental validation confirms the feasibility of the proposed scheme, demonstrating significant improvement in higher-order modes suppression performance.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.