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Experimental study on phase space reconstruction of high-brightness electron beam
- NUCLEAR TECHNIQUES Vol. 41, Issue 3, Article number: 030103(2018)
- 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：
DOI：10.11889/j.0253-3219.2018.hjs.41.030103
CLC： TL271Received：27 September 2017，
Revised：12 October 2017，
Published：10 March 2018
- 稿件说明：
移动端阅览
Qinglin YU, Meng ZHANG, Duan GU, et al. Experimental study on phase space reconstruction of high-brightness electron beam[J]. Nuclear techniques, 2018, 41(3): 030103
Qinglin YU, Meng ZHANG, Duan GU, et al. Experimental study on phase space reconstruction of high-brightness electron beam[J]. Nuclear techniques, 2018, 41(3): 030103 DOI： 10.11889/j.0253-3219.2018.hjs.41.030103.
摘要
束团相空间是描述加速器中束流运行状态的重要参数，了解相空间的真实分布对于加速器设计、束团操纵具有非常重要的意义，利用相空间重建技术能够直观地得到束团二维相空间分布。本文结合计算机断层扫描技术（Computer Tomography，CT）与归一化相空间理论，在理论推导和模拟验证的基础上，分别利用MENT（Maximum Entropy）算法和FBP（Filtered Back Projection）算法在上海X射线自由电子激光装置（Shanghai Soft X-ray Free Electron Laser facility，SXFEL）专用束测段（BI1）对电子束团的横向归一化相空间进行重建。通过重建算法变换得到电子束团的真实相空间分布，并对重建结果进行对比和误差分析。实验结果表明，MENT算法能够精确测量电子束团横向相空间分布。
Abstract
Background
2
Phase space is an important parameter to describe the beam transmission
and it is of great importance to measure the phase space distribution experimentally in linear accelerator (LINAC) commissioning. Computer tomography technology has been used in many accelerators to characterize the phase space of an electron beam in recent years.
Purpose
2
This study aims to measure two-dimensional distribution of phase space by reconstruction technology for high-brightness electron beam.
Methods
2
Maximum entropy (MENT) algorithm and filtered back projection (FBP) algorithm were combined with computer tomography technology and normalized phase space theory to reconstruct the normalized phase space of the beam. Then transformed the normalized phase space to real phase space with experimental verification at special beam insertion (BI1) of Shanghai Soft X-ray Free Electron Laser facility (SXFEL).
Results
2
The results from FBP algorithm and MENT algorithm were compared
and the latter showed better performance than the former. The emittance and Twiss parameters calculated by reconstructed phase space were very close to the values obtained by quadrupole scan method.
Conclusion
2
The experimental results show that computer tomography technology with MENT algorithm can reconstruct the beam phase space exactly.
关键词
Keywords
references
M G Ibison , K M Hock , D J Holder , . ALICE tomography section:measurements and analysis . Journal of Instrumentation , 2012 . 7 ( 4 ): 221 - 224 . DOI: 10.1088/1748-0221/7/04/P04016 http://doi.org/10.1088/1748-0221/7/04/P04016 .
D Stratakis , R A Kishek , H Li , . Tomography as a diagnostic tool for phase space mapping of intense partical beams . Physical Review Special Topics-Accelerators and Beams , 2006 . 9 ( 11 ): 112801 DOI: 10.1103/PhysRevSTAB.9.112801 http://doi.org/10.1103/PhysRevSTAB.9.112801 .
A C Kak , M Slaney , G Wang . Principles of computerized tomographic imaging . Medical Physics , 2002 . 29 ( 1 ): 107 - 107 . DOI: 10.1137/1.9780898719277 http://doi.org/10.1137/1.9780898719277 .
C B McKee , P G Oshea , J M J Madey . Phase space tomography of relativistic electron beams . Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment , 1995 . 358 ( 1 ): 264 - 267 . DOI: 10.1016/0168-9002(94)01411-6 http://doi.org/10.1016/0168-9002(94)01411-6 .
Rimjaem S, Asova G, Bähr J, et al. Measurements of transverse projected emittance for different bunch charges at PITZ[C]. Proceedings of FEL2010, Malmö, Sweden, 2010: 410-413. https://www.researchgate.net/publication/50385961_Measurements_of_Transverse_Projected_Emittance_for_Different_Bunch_Charges_at_PITZ
Asova G, Grabosch H J, Gross M, et al. First results with tomographic reconstruction of the transverse phase space at PITZ[C]. Proceedings of FEL2011, Shanghai, China, 2011: 543-546. https://www.researchgate.net/publication/268052396_First_results_with_tomographic_reconstruction_of_the_transverse_phase_space_at_PITZ
G Minerbo . MENT:a maximum entropy algorithm for reconstruction a source from projection data . Computer Graphics and Image Processing , 1979 . 10 ( 1 ): 48 - 68 . DOI: 10.1016/0146-664X(79)90034-0 http://doi.org/10.1016/0146-664X(79)90034-0 .
C T Mottershead . Maximum entropy beam diagnostic tomography . IEEE Transaction on Nuclear Science , 1985 . 32 ( 5 ): 1970 - 1972 . DOI: 10.1109/TNS.1985.4333784 http://doi.org/10.1109/TNS.1985.4333784 .
K M Hock , M G Ibison . A study of the maximum entropy technique for phase space tomography . Journal of Instrumentation , 2013 . 8 ( 2 ): P02003 DOI: 10.1088/1748-0221/8/02/P02003 http://doi.org/10.1088/1748-0221/8/02/P02003 .
Honkavaara K. Electron beam characterization at PITZ and the VUV-FEL at DESY[C]. Proceeding of the 27th International Free Electron Laser Conference, California, America, 2005: 411-417. https://www.researchgate.net/publication/228732641_Electron_Beam_Characterization_at_PITZ_and_the_VUV-FEL_at_DESY
Rao Y N, Baartman R. Transverse phase space tomography in TRIUMF injection beamline[C]. Proceedings of IPAC2011, San Sebastian, Spain, 2011: 1144-1146. https://www.researchgate.net/publication/233421588_Transverse_Phase_Space_Tomography_in_TRIUMF_Injection_Beamline
Reggiani D, Seidel M, Allen C K. Transverse phase-space beam tomography at PSI and SNS proton accelerators[C]. Proceedings of IPAC2010, Kyoto, Japan, 2010: 1128-1130. https://www.researchgate.net/publication/228812620_Transverse_phase-space_beam_tomography_at_PSI_and_SNS_proton_accelerators
向导. 高亮度电子束发射度、束长和束斑的先进测量方法研究[D]. 北京: 清华大学, 2008.
XIANG Dao. Advanced beam measurements of emittance, bunch length and beam size for high-brightness electron beam[D]. Beijing: Tsinghua University, 2008.
Huang D Z, Gu Q, Zhang M, et al. Design study of the Linac of the Shanghai soft X-ray free electron laser facility[C]. Proceedings of FEL 2012, Nara, Japan, 2012: 141-143. http://www.irgrid.ac.cn/handle/1471x/859898
K M Hock , M G Ibison , D J Holder , . Beam tomography research at Daresbury laboratory . Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment , 2014 . 753 ( 14 ): 38 - 55 . DOI: 10.1016/j.nima.2014.03.050 http://doi.org/10.1016/j.nima.2014.03.050 .
许 珊珊 , 叶 恺容 , 陈 永忠 . SSRF直线加速器束流发射度测量 . 核技术 , 2008 . 31 ( 3 ): 174 - 177 . http://d.wanfangdata.com.cn/Periodical_hjs200803004.aspx .
Shanshan XU , Kairong YE , Yongzhong CHEN . Emittance measurement for electron beam of SSRF linac . Nuclear Techniques , 2008 . 31 ( 3 ): 174 - 177 . http://d.wanfangdata.com.cn/Periodical_hjs200803004.aspx .
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