Analysis of transverse feedback effect on beam using bunch-by-bunch position data

Ning ZHANG; Longwei LAI; Liwu DUAN; Yongbin LENG

doi:10.11889/j.0253-3219.2017.hjs.40.120101

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Analysis of transverse feedback effect on beam using bunch-by-bunch position data

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | 更新时间：2021-05-19

- Analysis of transverse feedback effect on beam using bunch-by-bunch position data
- NUCLEAR TECHNIQUES Vol. 40, Issue 12, Article number: 120101(2017)
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.11889/j.0253-3219.2017.hjs.40.120101
  CLC： TL99
- Received：30 March 2017，
  
  Revised：26 June 2017，
  
  Published：10 December 2017
- 稿件说明：
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Ning ZHANG, Longwei LAI, Liwu DUAN, et al. Analysis of transverse feedback effect on beam using bunch-by-bunch position data[J]. Nuclear techniques, 2017, 40(12): 120101
DOI：

Ning ZHANG, Longwei LAI, Liwu DUAN, et al. Analysis of transverse feedback effect on beam using bunch-by-bunch position data[J]. Nuclear techniques, 2017, 40(12): 120101 DOI： 10.11889/j.0253-3219.2017.hjs.40.120101.

摘要

为了提升上海光源储存环横向反馈系统的性能，进一步优化抑制束团串内部横向耦合不稳定性，需要更深入了解现有束流反馈系统模式下的工作状态。用逐束团位置在线采集的方法，在束流诊断实验中获取横向反馈系统不同反馈作用力条件下的逐束团位置信息。通过离线频谱分析，得到束团串横向不稳定振荡振幅随反馈作用力及束团分布的变化规律，表明了横向反馈作用力对束流的整体作用具有正相关性，但对不同束团及束团串的作用效果具有较大差异。为更深入的研究束流不稳定性及束流优化提供了数据支持。

Abstract

Background

As the transverse instability of beam has been suppressed effectively in storage ring

further optimization would mainly refer to the residual coupled instability for individual-bunch in transverse feedback (TFB) system upgrade plan in Shanghai Synchrotron Radiation Facility (SSRF). TFB system could affect the transverse motion of bunched beam.

Purpose

This study aims to analyze TFB effect on beam to make a definite target of TFB optimization in the future

and to understand the characteristics of coupled-bunch instability.

Methods

A bunch-by-bunch position online data acquisition system was employed in the beam experiment

transverse position data with different TFB gain force was obtained for further analysis. By spectrum analysis of bunch-by-bunch position data in MATLAB

transverse oscillation amplitude distribution with TFB gain force and bunch ID were curved.

Results

Experimental curves showed that transverse position data with various TFB gain had unregular relationship with the coupled-bunch instability.

Conclusion

TFB effect on beam transverse instability evaluated by using bunch-by-bunch position data could offer data support for further research.

关键词

Keywords

references

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Related Institution

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