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An approach to characterize Lorentz force transfer function for superconducting cavities

文献类型：期刊论文

作者Qiu, Feng1,2,3,4; Zhu, Zhenglong1; Ma, Jinying1,4; Jiang, Tiancai1; Xue, Zongheng1; Gao, Zheng1; Chen, Qi1; Xu, Chengye1,4; Huang, Guirong1,4; He, Yuan1,4
刊名NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
出版日期2021-10-01
卷号1012页码:7
关键词LLRF Lorentz force detuning Superconducting Ponderomotive
ISSN号0168-9002
DOI10.1016/j.nima.2021.165633
通讯作者Qiu, Feng(qiufeng@impcas.ac.cn) ; He, Yuan(hey@impcas.ac.cn)
英文摘要Superconducting radio-frequency (SRF) cavities are preferred in many modern accelerator facilities to reduce the operation cost of the RF power systems. SC cavities are usually sensitive to small mechanical perturbations because of their narrow bandwidth. These perturbations such as microphonics and Lorentz force detuning (LFD) can significantly detune the SRF cavity and therefore not only deteriorate the cavity field stabilities but also increase the RF power requirements. Piezo-electric actuators are widely adopted to suppress the cavity detuning caused by LFD and microphonics. Many advanced detuning compensation strategies were proposed to suppress the microphonics and LFD in recent years. The dynamic models of the LFD and piezo actuator are essential in these activities. Generally, the models of LFD can be identified by modulating the cavity field with sinusoidal signals and then measuring the corresponding steady-state amplitude and phase response of the cavity. However, for some SRF cavities, the cavity field may becomes unstable because of the presence of the ponderomotive effects, leading to a unacceptable measurement result. We present a new approach to identify the dominant modes of the LFD model based on a grey-box models estimation method. The validity of the approach was demonstrated by comparing the model output and measurement results on SRF cavities of real accelerator facilities.
WOS研究方向Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种英语
WOS记录号WOS:000713695900003
出版者ELSEVIER
源URL[http://119.78.100.186/handle/113462/139951]  
专题中国科学院近代物理研究所
通讯作者Qiu, Feng; He, Yuan
作者单位1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
2.Grad Univ Adv Studies, Hayama, Kanagawa 2400193, Japan
3.High Energy Accelerator Res Org, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan
4.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Qiu, Feng,Zhu, Zhenglong,Ma, Jinying,et al. An approach to characterize Lorentz force transfer function for superconducting cavities[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2021,1012:7.
APA Qiu, Feng.,Zhu, Zhenglong.,Ma, Jinying.,Jiang, Tiancai.,Xue, Zongheng.,...&Miura, Takako.(2021).An approach to characterize Lorentz force transfer function for superconducting cavities.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,1012,7.
MLA Qiu, Feng,et al."An approach to characterize Lorentz force transfer function for superconducting cavities".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 1012(2021):7.

入库方式： OAI收割

来源：近代物理研究所

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