Courant-Snyder invariant density screening method for emittance analysis

SUN Ji-Lei; TANG Jing-Yu; JING Han-Tao

doi:10.1088/1674-1137/35/11/015

Chinese Physics C> 2011, Vol. 35> Issue(11) : 1059-1065 DOI: 10.1088/1674-1137/35/11/015

Courant-Snyder invariant density screening method for emittance analysis

Abstract
HTML
Reference
Related

PDF

Abstract：
Emittance is an important characteristic of describing charged particle beams. In hadron accelerators, we often meet irregular beam distributions that are not appropriately described by a single rms emittance or 95% emittance or total emittance. In this paper，it is pointed out that in many cases a beam halo should be described with very different Courant-Snyder parameters from the ones used for the beam core. A new method — the Courant-Snyder invariant density screening method - is introduced for analyzing emittance data clearly and accurately. The method treats the emittance data from both measurements and numerical simulations. The method uses the statistical distribution of the beam around each particle in phase space to mark its local density parameter, and then uses the density distribution to calculate the beam parameters such as the Courant-Snyder parameters and emittance for different beam boundary definitions. The method has been used in the calculations for beams from different sources, and shows its advantages over other methods. An application code based on the method including the graphic interface has also been designed.

References

[1]

Buon J. Beam Phase Space and Emittance, CERN Accelerator School, 4th general course, 91-04, 302 Frank J. Sacherer, RMS Envelope Equations with Space Charge, PAC1971, CERN, Geneva, Switzerland, 1105-11073 Takeda H. Parmila, LA-UR-98-4478, Los Alamos National Laboratory, 2005, 47-494 Crandall K R, Rusthoi D P. TRACE 3-D Documentation (Third Edition), LA-UR-97-886, Los Alamos National Laboratory, 1997. 3, 705 Galambos J D, Holmes J A, Olsen D K. ORBIT User Manual Version 1.10, SNS Building MS-8218, Oak Ridge National Laboratory, 1999, 15-166 TANG Jing-Yu. Nucl. Instrum. Methods A, 2008, 595: 561-5677 Stockli M P, Welton R F, Keller R. Self-consistent, Unbiased Exclusion Methods of Emittance Analysis, 20th IEEE Particle Accelerator Conference, Portland, OR, USA, 2003, 5278 Stockli M P. AIP Conf. Proc., 2006, 868: 25-629 Stockli M P et al. AIP Conf. Proc., 2002, 639: 135-15910 WEI Jie et al. Nuc. Inst. Meth. Phys. Res. A, 2009, 600: 10-1311 Private communication with MENG Cai12 Private communication with Peng Jun13 The Mathworks Inc., Matlab trial software

[1]	Ulaş Özdem . Unveiling the electromagnetic structure and intrinsic dynamics of spin-$ \bf{3/2}$ hidden-charm pentaquarks: A comprehensive QCD analysis. Chinese Physics C, 2025, 49(10): 103106. doi: 10.1088/1674-1137/ade95a
[2]	Xin Wu , Qi Chen , Ye Xing , Zhi-Peng Xing , Ruilin Zhu . SU(3) flavor symmetry analysis of hyperon non-leptonic two body decays. Chinese Physics C, 2025, 49(12): 123101. doi: 10.1088/1674-1137/adf1f1
[3]	Bin Wu , Guo-Liang Yu , Zhi-Gang Wang , Ze Zhou , Jie Lu . Analysis of the form factors of B_c → D^(), D_s^() and relevant nonleptonic decays. Chinese Physics C, 2025, 49(10): 103109. doi: 10.1088/1674-1137/ade95d
[4]	Ronghao Hu , Qike Gu , Kejian Shi , Zezhong Wei , Meng Lv , Shiyang Zou , Yongkun Ding . Polarized neutron beams from polarized deuterium-tritium fusion with applications to magnetic field imaging in high-energy-density plasmas. Chinese Physics C, 2025, 49(12): 124102. doi: 10.1088/1674-1137/adec4f
[5]	D. Banerjee , S. Sahoo . Analysis of λ_b→λ l⁺l^- rare decays in a non-universal Z' model. Chinese Physics C, 2017, 41(8): 083101. doi: 10.1088/1674-1137/41/8/083101
[6]	ZHANG Cong , HE Yuan , ZHAO Hong-Wei , ZHANG Sheng-Hu . Multipacting simulation and analysis of a taper quarter wave cavity by using Analyst-PT3P. Chinese Physics C, 2012, 36(4): 362-366. doi: 10.1088/1674-1137/36/4/012
[7]	YANG Hong-Xun (for the BESⅡ collaboration) . Partial wave analysis of J/ψ→ppπ⁰ and measurement of J/ψ→ppη, ppη´. Chinese Physics C, 2009, 33(12): 1331-1335. doi: 10.1088/1674-1137/33/12/048
[8]	WANG Ji-Ke , MAO Ze-Pu , BIAN Jian-Ming , CAO Guo-Fu , CAO Xue-Xiang , CHEN Shen-Jian , DENG Zi-Yan , FU Cheng-Dong , GAO Yuan-Ning , HE Kang-Lin , HE Miao , HUA Chun-Fei , HUANG Bin , HUANG Xing-Tao , JI Xiao-Bin , LI Fei , LI Hai-Bo , LI Wei-Dong , LIANG Yu-Tie , LIU Chun-Xiu , LIU Huai-Min , LIU Suo , LIU Ying-Jie , MA Qiu-Mei , MA Xiang , MAO Ya-Jun , MO Xiao-Hu , PAN Ming-Hua , PANG Cai-Ying , PING Rong-Gang , QIN Ya-Hong , QIU Jin-Fa , SUN Sheng-Sen , SUN Yong-Zhao , WANG Liang-Liang , WEN Shuo-Pin , , , , , , . Software alignment of the BESⅢ main drift chamber using the Kalman Filter method. Chinese Physics C, 2009, 33(3): 210-216. doi: 10.1088/1674-1137/33/3/010
[9]	ZHANG Man-Zhou , HOU Jie , LI Hao-Hu , LIU Gui-Min , LI De-Ming . Optimal sorting method and application to SSRF booster dipoles. Chinese Physics C, 2008, 32(11): 924-927. doi: 10.1088/1674-1137/32/11/015
[10]	GUO Yun-Jun , HE Kang-Lin . Muon Identification Using the Efficiencies Ratio Method at BESⅡ. Chinese Physics C, 2007, 31(11): 1050-1055.
[11]	ZHU Xiang , SHEN Wen-Qing , HU Xiao-Qing , ZHU Yong-Tai , WANG Bing . A SIMPLE MODEL ANALYSIS OF THE INCOMPLETE DIC REACTION. Chinese Physics C, 1990, 14(9): 835-841.
[12]	WU Zhong-Li . ANALYSIS OF THE MOMENTUM DISTRIBUTION WIDTH OF THE PREOJECTILE-LIKE-FRAGMENT FROM HEAVY ION COLLISIONS. Chinese Physics C, 1989, 13(8): 752-754.
[13]	CHANG KONG-LIANG . DIMENSIONAL METHOD TO SOLVE THE DIFFUSION CONVECTION EQUATION OF SOLAR COSMIC RAYS. Chinese Physics C, 1978, 2(3): 200-210.

Access

Get Citation

SUN Ji-Lei, TANG Jing-Yu and JING Han-Tao. Courant-Snyder invariant density screening method for emittance analysis[J]. Chinese Physics C, 2011, 35(11): 1059-1065. doi: 10.1088/1674-1137/35/11/015

SUN Ji-Lei, TANG Jing-Yu and JING Han-Tao. Courant-Snyder invariant density screening method for emittance analysis[J]. Chinese Physics C, 2011, 35(11): 1059-1065. doi: 10.1088/1674-1137/35/11/015 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2011-03-10
Revised: 2011-04-07

Article Metric

Article Views(3733)
PDF Downloads(350)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Courant-Snyder invariant density screening method for emittance analysis

Received Date: 2011-03-10

Accepted Date: 2011-04-07

Available Online: 2011-11-05

Abstract: Emittance is an important characteristic of describing charged particle beams. In hadron accelerators, we often meet irregular beam distributions that are not appropriately described by a single rms emittance or 95% emittance or total emittance. In this paper，it is pointed out that in many cases a beam halo should be described with very different Courant-Snyder parameters from the ones used for the beam core. A new method — the Courant-Snyder invariant density screening method - is introduced for analyzing emittance data clearly and accurately. The method treats the emittance data from both measurements and numerical simulations. The method uses the statistical distribution of the beam around each particle in phase space to mark its local density parameter, and then uses the density distribution to calculate the beam parameters such as the Courant-Snyder parameters and emittance for different beam boundary definitions. The method has been used in the calculations for beams from different sources, and shows its advantages over other methods. An application code based on the method including the graphic interface has also been designed.

HTML

Reference (1)

Courant-Snyder invariant density screening method for emittance analysis

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Courant-Snyder invariant density screening method for emittance analysis

HTML

目录