KB镜束流截面测量系统研制

祝德充; 岳军会; 随艳峰; 季大恒; 曹建社; 叶恺容; 陈杰; 田顺强; 冷用斌

doi:10.11884/HPLPB201830.170415

KB镜束流截面测量系统研制

doi: 10.11884/HPLPB201830.170415

1.
中国科学院高能物理研究所, 粒子加速物理与技术重点实验室, 北京 100049
2.
中国科学院大学, 北京 100049
3.
中国科学院上海应用物理研究所, 上海 201800

基金项目:

国家自然科学基金项目 11605213

详细信息

作者简介:
祝德充(1987—)，男，博士研究生，主要从事加速器束流诊断技术研究; zhudc@ihep.ac.cn

中图分类号: TL594;TL506
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- 被引次数: 4
出版历程
- 收稿日期: 2017-10-29
- 修回日期: 2017-12-10
- 刊出日期: 2018-04-15

Development of beam profile monitor using Kirkpatrick Baez mirrors

1.
Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

摘要

摘要: 为了对衍射极限储存环的束流横向截面尺寸及发射度进行测量，设计了一套Kirkpatrick-Baez(KB)反射镜聚焦成像系统，并在上海光源(SSRF)储存环进行预制研究。该系统主体由两面垂直放置的KB反射镜组成，分别在水平及垂直方向对弯转磁铁光源点进行成像，系统工作在硬X射线波段，聚焦光斑被闪烁体X射线相机采集。对影响系统成像质量的像差和点扩散函数进行了计算。目前，实现了对束流的实时成像，可精确测量束流横向截面尺寸为75.9 μm(水平方向)和20.2 μm(垂直方向)，系统稳定性(RMS)小于0.1 μm。
- KB镜 /
- 束流尺寸测量 /
- 束流诊断 /
- 发射度 /
- 同步辐射
Abstract: A Kirkpatrick Baez mirror imaging system has been designed and installed to measure the beam transverse profile and emittance of SSRF storage ring. The new system could be interchangeable with the original X-pinhole system. Two orthogonal cylindrical mirrors are used to image the dipole source point in the horizontal and vertical directions. Hard X-ray with peak energy of 20.5 keV will be focused at the X-ray scintillator camera. Aberration and point spread function which would cause image blur are evaluated. The system commissioning and optimization have been done. The electron transverse beam size has been measured precisely with horizontal 75.9 μm and vertical 20.2 μm. The system stability is less than 0.1 μm.
- KB mirror /
- beam size measurement /
- beam diagnostic /
- emittance /
- synchrotron radiation

HTML全文

图 1 KB镜成像系统设计简图

Figure 1. Schematic diagram of Kirkpatrick Baez (KB) mirror system

下载: 全尺寸图片幻灯片

图 2 经过Al窗口与入射狭缝、VFM镜、HFM镜后的同步辐射光谱

Figure 2. Spectrum of the synchrotron radiation filtered by Al window, entrance slits, vertical focusing mirror (VFM) and horizontal focusing mirror (HFM)

下载: 全尺寸图片幻灯片

图 3 KB镜系统获取的储存环束流截面图像

Figure 3. Transverse beam profile captured by KB mirror system

下载: 全尺寸图片幻灯片

图 4 束流水平及垂直尺寸的1 h历史数据

Figure 4. 1 h history data of horizontal and vertical beam size

下载: 全尺寸图片幻灯片

表 1 KB镜参数

Table 1. Design parameters of KB mirrors

mirror	VFM	HFM
shape	cylindrical	cylindrical
radius of curvature/km	2.57	2.57
grazing angle/mrad	3	3
substrate	silicon	silicon
coating	Rh	Rh
acceptance angle/μrad	122	117
size L×W×H	320 mm×40 mm×40 mm	320 mm×40 mm×40 mm
clear aperture L×W	300 mm×10 mm	300 mm×10 mm
roughness RMS/nm	< 0.2	< 0.2
slope error RMS/μrad	< 0.3	< 0.3
distance to source/m	7.36	7.72
distance to image/m	8.08	7.72
magnification	1.1	1
heat load	hitting 1.083 W@absorbed 0.832 W	hitting 0.251 W@absorbed 0.058 W

下载: 导出CSV

表 2 光源点理论参数

Table 2. Theoretical electron parameters of source point

β_x/m	β_y/m	η_x/m	η_y/m	σ_e
0.794 0	12.65	0.048 7	0	0.985 3×10^-3

下载: 导出CSV

参考文献(10)

[1]	Scheidt K. UV and visible light diagnostics for the ESRF storage ring[C]//Proc of European Particle Accelerator Conference. 1996: 1621-1623.
[2]	Mitsuhashi T. Spatial coherency of the synchrotron radiation at the visible light region and its application for the electron beam profile measurement[C]//Proceedings of Particle Accelerator Conference. 1997: 766-768.
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[5]	Kube G, Gonschior J, Hahn U, et al. PETRA Ⅲ diagnostics beamline for emittance measurements[C]//Proc of IPAC. 2010.
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[7]	陈杰, 叶恺容, 冷用斌. 上海光源同步辐射空间干涉仪研制[J]. 强激光与粒子束, 2011, 23(1): 179-184. http://www.hplpb.com.cn/article/id/4446 Chen Jie, Ye Kairong, Leng Yongbin. Development of Shanghai synchrotron radiation facility synchrotron radiation interferometer. High Power Laser and Particle Beams, 2011, 23(1): 179-184 http://www.hplpb.com.cn/article/id/4446
[8]	Leng Yongbin, Ye Kairong, Zhou Weimin, et al. SSRF beam diagnostics system commissioning[C]//Proc of Diagnostics and Instrumentation for Particle Accelerator Conference. 2009: 24-26.
[9]	Kirkpatrick P, Baez A V. Formation of optical images by X-rays[J]. Journal of the Optical Society of America, 1948, 38(9): 766. doi: 10.1364/JOSA.38.000766
[10]	Susini J. Design parameters for hard X-ray mirrors: the European Synchroton Radiation Facility case[J]. Optical Engineering, 1995, 34(2): 361-376. doi: 10.1117/12.194835

施引文献

期刊类型引用(2)

1.	祝德充，随艳峰，岳军会，彭月梅，刘佳明，曹建社. 高能光源增强器束流横向尺寸测量系统设计. 强激光与粒子束. 2021(04): 85-89 . 本站查看
2.	王洪建，肖沙里，林睿，蒋昀赟. 基于Denauit-Hartenbery的高分辨Kirkpatrick-Baez镜成像结构设计与控制方法研究. 南京信息工程大学学报(自然科学版). 2020(03): 341-346 . 百度学术