深圳产业光源单束团不稳定性研究

冀锐敏; 林椿涛; 何涛; 徐小林; 刘桂民

doi:10.3724/j.0253-3219.2026.hjs.49.250057

您当前的位置：

首页 >

文章列表页 >

深圳产业光源单束团不稳定性研究

同步辐射技术及应用 | 更新时间：2026-02-13

- 深圳产业光源单束团不稳定性研究
- Single bunch instability analysis based on SILF design
- 核技术 2026年49卷第2期文章编号：020103
- 作者机构：
  
  深圳先进光源研究院深圳 518107
- 作者简介：
  
  冀锐敏，女，1984年出生，2018年于中国科学院大学获博士学位，研究领域为加速器物理
  刘桂民，E-mail：liugm@mail.iasf.ac.cn
- 基金信息：
  
  深圳重大科技基础设施关键技术和设备研发扶持计划资助
- DOI：10.3724/j.0253-3219.2026.hjs.49.250057
  中图分类号： TL99
- 收稿：2025-02-11，
  
  修回：2025-08-20，
  
  纸质出版：2026-02-15
- 稿件说明：
移动端阅览
冀锐敏,林椿涛,何涛等.深圳产业光源单束团不稳定性研究[J].核技术,2026,49(02):020103.

JI Ruimin,LIN Chuntao,HE Tao,et al.Single bunch instability analysis based on SILF design[J].NUCLEAR TECHNIQUES,2026,49(02):020103.
冀锐敏,林椿涛,何涛等.深圳产业光源单束团不稳定性研究[J].核技术,2026,49(02):020103. DOI： 10.3724/j.0253-3219.2026.hjs.49.250057. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.250057.

JI Ruimin,LIN Chuntao,HE Tao,et al.Single bunch instability analysis based on SILF design[J].NUCLEAR TECHNIQUES,2026,49(02):020103. DOI： 10.3724/j.0253-3219.2026.hjs.49.250057. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.250057.

摘要

深圳产业光源（Shenzhen Innovation Light Source Facility，SILF）作为第四代光源，设计使用半径12 mm的真空盒以及间隙低至4 mm的大量插入件，显著增加了全环阻抗。由于超低横向发射度与小动量压缩因子设计，束流集体效应成为限制机器性能的主要因素之一。因此，SILF拟采用三次超导谐波腔（3rd Harmonic Cavity，3HC）来拉伸束团长度、抑制不稳定性和提升束流阈值。本文基于SILF储存环磁聚焦结构与阻抗模型，通过单束团不稳定性研究，分析了有/无谐波腔的差异，对比了主动式和被动式谐波腔的功效。结果表明：三次谐波腔可大幅提升单束团电量阈值，有利于实现多种运行模式；主动式和被动式超导谐波腔对应的单束团电量阈值差别较小，色品为+3时分别为2.5 nC和2.4 nC；现阻抗条件下单束团电量阈值满足300 mA设计需求。

Abstract

Background

Shenzhen Innovation Light Source Facility (SILF)

as a fourth-generation synchrotron light source

employs a vacuum chamber with a 12 mm radius and numerous insertion devices with gaps as low as 4 mm

resulting in significantly high beam-coupling impedance. The ultra-low transverse emittance (~90 pm·rad) and small momentum compaction factor (6.6×10

-5

) make the beam highly sensitive to collective effects

which become critical factors limiting machine performance.

Purpose

This study aims to investigate the impact of 3rd Harmonic Cavity (3HC) on single-bunch instabilities in SILF and compare the effectiveness between active and passive 3HC configurations for beam instability suppression and threshold enhancement.

Methods

The broadband impedance of SILF storage ring was calculated based on the lattice design and impedance model. Firstly

the resistive-wall impedance and geometric impedance were modeled and analyzed using ECHO and CST programs respectively

yielding a total longitudinal broadband impedance of approximately 110 mΩ. Then

single-bunch instability simulations were performed us

ing ELEGANT program under three operational modes: without 3HC (mode A)

with active 3HC (mode B)

and with passive 3HC (mode C). For modes A and B

single bunch simulations with 10

macro-particles were tracked for 10

turns at optimum voltage and phase configurations under zero current conditions. Finally

for mode C

multi-bunch simulations with 5%~20% filling rates were conducted using 10

macro-particles per bunch and tracked for 2×10

turns to establish the electromagnetic field in the passive 3HC

with the detuning frequency adjusted to achieve a bunch-lengthening factor of approximately 4.

Results

Computational results show that both active and passive 3HCs extend the RMS bunch length from 2.5 mm to approximately 11.9~12.0 mm

achieving more than 4-fold bunch lengthening

and maintain energy spread at 1.0‰ up to 0.9~1.3 nC single bunch charge

satisfying the 300 mA design requirement. For Transverse Mode Coupling Instability (TMCI)

the single bunch charge thresholds reach 2.5 nC and 2.4 nC for active and passive 3HC respectively at chromaticity of +3

compared to only 1.0 nC without 3HC at chromaticity above +1. The performance difference between active and passive 3HC is less than 5% across all chromaticity settings

demonstrating their comparable effectiveness in suppressing single-bunch instabilities.

Conclusions

Results of this study demonstrate that the 3HC is essential for SILF to achieve high-performance operation with single bunch charge exceeding 1 nC. The minimal performance difference (< 5%) between active and passive 3HC indicates that either configuration is viable for SILF implementation.

关键词

Keywords

references

焦毅 , 徐刚 , 陈森玉 , 等 . 衍射极限储存环物理设计研究进展 [J ] . 强激光与粒子束 , 2015 , 27 ( 4 ): 045108 . DOI: 10.11884/HPLPB201527.045108 http://dx.doi.org/10.11884/HPLPB201527.045108 .

JIAO Yi , XU Gang , CHEN Senyu , et al . Advances in physical design of diffraction-limited storage ring [J ] . High Power Laser and Particle Beams , 2015 , 27 ( 4 ): 045108 . DOI: 10.11884/HPLPB201527.045108 http://dx.doi.org/10.11884/HPLPB201527.045108 .

赵瑀 , 李志平 , 刘伟航 , 等 . 衍射极限储存环光源相关物理问题 [J ] . 科学通报 , 2020 , 65 ( 24 ): 2587 – 2600 . DOI: 10.1360/TB-2020-0165 http://dx.doi.org/10.1360/TB-2020-0165 .

ZHAO Yu , LI Zhiping , LIU Weihang , et al . Physics issues of the diffraction-limited storage ring light source [J ] . Chinese Science Bulletin , 2020 , 65 ( 24 ): 2587 – 2600 . DOI: 10.1360/TB-2020-0165 http://dx.doi.org/10.1360/TB-2020-0165 .

王娜 , 许海生 , 田赛克 , 等 . 高能同步辐射光源中的耦合阻抗及束流集体效应研究 [J ] . 原子能科学技术 , 2019 , 53 ( 9 ): 1601 – 1606 . DOI: 10.7538/yzk.2019.youxian.0170 http://dx.doi.org/10.7538/yzk.2019.youxian.0170 .

WANG Na , XU Haisheng , TIAN Saike , et al . Study of beam coupling impedance and beam collective effect in high energy photon source [J ] . Atomic Energy Science and Technology , 2019 , 53 ( 9 ): 1601 – 1606 . DOI: 10.7538/yzk.2019.youxian.0170 http://dx.doi.org/10.7538/yzk.2019.youxian.0170 .

He T L , Li W W , Bai Z H , et al . Longitudinal equilibrium density distribution of arbitrary filled bunches in presence of a passive harmonic cavity and the short range Wakefield [J ] . Physical Review Accelerators and Beams , 2021 , 24 ( 4 ): 044401 . DOI: 10.1103/physrevaccelbeams. 24.044401 http://dx.doi.org/10.1103/physrevaccelbeams.24.044401 .

He T , Sun Z B , Zhang T , et al . Physics design of the Shenzhen innovation light source storage ring [J ] . Journal of Instrumentation , 2023 , 18 ( 5 ): P05037 . DOI: 10.1088/1748-0221/18/05/p05037 http://dx.doi.org/10.1088/1748-0221/18/05/p05037 .

Zagorodnov I , Weiland T . TE/TM field solver for particle beam simulations without numerical Cherenkov radiation [J ] . Physical Review Special Topics - Accelerators and Beams , 2005 , 8 ( 4 ): 042001 . DOI: 10.1103/physrevstab. 8.042001 http://dx.doi.org/10.1103/physrevstab.8.042001 .

张敏 . CST微波工作室用户全书-卷一/卷二 [M ] . 成都 : 电子科技大学出版社 , 2004 .

ZHANG Min . CST microwave studio user handbook-Vol . 1/Vol .2[M ] . Chengdu : Chengdu University of Electronic Science and Technology Press , 2004 .

Borland M . Elegant: A flexible SDDS-Compliant code for accelerator simulation, LS-287 [R ] . United States : Advanced Photon Source , 2000 . 10.2172/761286 http://dx.doi.org/10.2172/761286

Wang Y , Borland M . Pelegant: a parallel accelerator simulation code for electron generation and tracking [C ] // Advanced Accelerator Concepts: 12th Advanced Accelerator Concepts Workshop . Lake Geneva, Wisconsin (USA). AIP , 2006 : 241 – 247 . DOI: 10.1063/1.2409141 http://dx.doi.org/10.1063/1.2409141 .

Wang D , Bane K , Li D R , et al . Broadband impedance modeling and single bunch instabilities estimations of the advanced light source upgrade project [J ] . Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2022 , 1031 : 166524 . DOI: 10.1016/j.nima. 2022.166524 http://dx.doi.org/10.1016/j.nima.2022.166524 .

王猛 , 张文志 , 田顺强 , 等 . 中能衍射极限环中电阻壁和高频系统阻抗计算与优化 [J ] . 原子能科学技术 , 2022 , 56 ( 9 ): 1821 – 1831 . DOI: 10.7538/yzk.2022.youxian.0348 http://dx.doi.org/10.7538/yzk.2022.youxian.0348 .

WANG Meng , ZHANG Wenzhi , TIAN Shunqiang , et al . Calculation and optimization of resistive wall and RF cavity impedance in medium energy diffraction limit storage ring [J ] . Atomic Energy Science and Technology , 2022 , 56 ( 9 ): 1821 – 1831 . DOI: 10.7538/yzk.2022.youxian.0348 http://dx.doi.org/10.7538/yzk.2022.youxian.0348 .

WANG Na , TIAN Saike , WANG Jiuqing . Impedance evaluation of masks in HEPS storage ring [C ] // Proceedings of the 12th International Particle Accelerator Conference . Brazil , 2021 : 3145 – 3148 . DOI: 10.18429/JACoW-IPAC2021-WEPAB222 http://dx.doi.org/10.18429/JACoW-IPAC2021-WEPAB222 .

Wang C , Tan J H , Su D H , et al . Design and low-power test of an HOM-damped normal-conducting cavity for WALS [J ] . Nuclear Science and Techniques , 2025 , 36 : 110 . DOI: 10.1007/s41365-025-01672-w http://dx.doi.org/10.1007/s41365-025-01672-w .

Klein M , Nagaoka R . Study of collective beam instabilities for the MAX IV 3 GeV ring [C ] // Proceeding of IPAC2013 . China , 2013 : 1730 – 1732 .

Fielder R , Chao H C , Wang S W , et al . Single bunch instability studies with a new impedance database for Diamond-II [C ] // Proceedings of the 13th International Particle Accelerator Conference . Thailand , 2022 : 2257 – 2260 . DOI: 10.18429/JACoW-IPAC2022-WEPOMS011 http://dx.doi.org/10.18429/JACoW-IPAC2022-WEPOMS011 .

Pan Z L , Santis S D , Hellert T , et al . Beam-loading transients and bunch shape in the operation of passive harmonic cavities in the ALS-U [C ] // Proceeding of IPAC2018 . Canada , 2018 : 3298 – 3300 . DOI: 10.18429/JACoW-IPAC2018-THPAK037 http://dx.doi.org/10.18429/JACoW-IPAC2018-THPAK037 .

马志国 , 陈伟龙 , 王志军 , 等 . 162.5 MHz RFQ加速器的单束团选择 [J ] . 核技术 , 2021 , 44 ( 5 ): 050202 . DOI: 10.11889/j.0253-3219.2021.hjs.44.050202 http://dx.doi.org/10.11889/j.0253-3219.2021.hjs.44.050202 .

MA Zhiguo , CHEN Weilong , WANG Zhijun , et al . Single bunch selection for 162.5 MHz radio-frequency quadrupole accelerator [J ] . Nuclear Techniques , 2021 , 44 ( 5 ): 050202 . DOI: 10.11889/j.0253-3219.2021.hjs.44.050202 http://dx.doi.org/10.11889/j.0253-3219.2021.hjs.44.050202 .

Borland M , Berenc T , Lindberg R , et al . Tracking studies of a higher-harmonic bunch-lengthening cavity for the APS upgrade [C ] // Proceeding of IPAC2015 , USA , 2015 : 543 – 545 . DOI: 10.18429/JACoW-IPAC2015-MOPMA007 http://dx.doi.org/10.18429/JACoW-IPAC2015-MOPMA007 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

SSRF储存环高频屏蔽波纹管的研制