Distribution transformation by using step-like nonlinear magnets

doi:10.1016/j.nima.2004.05.124

	Distribution transformation by using step-like nonlinear magnets
	Tang, JY ; Li, HH ; An, SZ ; Maier, R
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
	2004-10-21
卷号	532 页码:538-547
关键词	uniform beam distribution distribution transformation step-like nonlinear magnets
ISSN号	0168-9002
DOI	10.1016/j.nima.2004.05.124
英文摘要	The uniform distribution of the beam on target is required in some high power beam applications to prolong the target lifetime or to improve the beam utilization. In this paper, a new method is proposed to transform irregular beam distributions in phase space into other kinds of distributions such as parabolic and fourth power in the transverse plane on target by using special nonlinear magnets. The nonlinear magnets can be designed similar to a dipole magnet, in which the emphasis is on the fringe field. The method is especially useful when dealing with beams with large emittance or/and with, dense core and sparse halo. The simulations show that the peak current density in the defined irradiation footprint can be reduced significantly while avoiding cutting off important beam halo due to high beam power. The application of the method to a high beam power accelerator (the ESS project) is also presented, where the peak current density at the target is reduced by a factor of about three. The method of using standard multipole magnets is also discussed, and an application to obtain the fourth power distribution is presented. (C) 2004 Elsevier B.V. All rights reserved.
WOS关键词	UNIFORM ; OPTICS
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics ; Spectroscopy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000224657700003
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/39323]
专题	中国科学院近代物理研究所
通讯作者	Tang, JY
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Beijing 100864, Peoples R China 2.Forschungszentrum Julich, Julich, Germany
推荐引用方式 GB/T 7714	Tang, JY,Li, HH,An, SZ,et al. Distribution transformation by using step-like nonlinear magnets[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2004,532:538-547.
APA	Tang, JY,Li, HH,An, SZ,&Maier, R.(2004).Distribution transformation by using step-like nonlinear magnets.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,532,538-547.
MLA	Tang, JY,et al."Distribution transformation by using step-like nonlinear magnets".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 532(2004):538-547.