A novel structure of multipole field magnets and their applications in uniformizing beam spot at target

doi:10.1016/j.nima.2012.06.048

IHEP OpenIR

	A novel structure of multipole field magnets and their applications in uniformizing beam spot at target
	Guo Z(郭臻); Tang JY(唐靖宇); Yang Z(杨征); Guo, Z; Tang, JY; Yang, Z; Wang, XQ; Sun, B; Sun B(孙彪)
	2012
发表期刊	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (IF:1.362[JCR-2016],1.211[5-Year])
卷号	691 页码:97-108
摘要	A novel structure of multipole field magnets is proposed, and it can provide any order either symmetric or anti-symmetric field distribution within a good-field region in a flat rectangular shape with relative field errors of about 1%. Some of these field distributions cannot be obtained by standard multipole magnets but are quite useful in some applications, thanks to the decoupling of the two halves of the magnets by a pair of shielding plates. In addition, the simplified structure compared with the standard one makes the magnet fabrication easier and cost effective. Two-dimensional magnetic field calculations for anti-symmetric sextupole, octupole, decapole and dodecapole fields show that the new types of multipole magnets have good field quality. Three-dimensional magnetic field calculations have confirmed the validity of the two-dimensional calculations. Symmetric field distributions by the simplified multipole field magnets have also been confirmed by two-dimensional field calculations. Two application examples by using numerical simulations are also given to show the effectiveness of simplified multipole field magnets in producing uniform-like beam spots at two different targets with different beam inputs. It is also shown that combinations of the lower order anti-symmetric field magnets - a merit of this magnet structure - are more advantageous than the traditional combination of octupole and dodecapole magnets in beam spot uniformization, besides with cheaper construction and operation costs. The applications of non-standard field distributions such as anti-symmetric sextupole and symmetric octupole field distributions in synchrotrons are to be exploited in the future. (c) 2012 Elsevier B.V. All rights reserved.
关键词	Multipole field magnet Symmetry of field distribution Shielding plates Beam spot uniformization Non-linear beam dynamics in synchrotrons
学科领域	Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
DOI	10.1016/j.nima.2012.06.048
收录类别	SCI ; ADS
WOS记录号	WOS:000309318400014
ADS Bibcode	2012NIMPA.691...97G
ADS URL	https://ui.adsabs.harvard.edu/abs/2012NIMPA.691...97G
ADS引文	https://ui.adsabs.harvard.edu/abs/2012NIMPA.691...97G/citations
引用统计	正在获取... 被引频次：5 [ADS]
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/223840
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Guo Z,Tang JY,Yang Z,et al. A novel structure of multipole field magnets and their applications in uniformizing beam spot at target[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2012,691:97-108.
APA	郭臻.,唐靖宇.,杨征.,Guo, Z.,Tang, JY.,...&孙彪.(2012).A novel structure of multipole field magnets and their applications in uniformizing beam spot at target.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,691,97-108.
MLA	郭臻,et al."A novel structure of multipole field magnets and their applications in uniformizing beam spot at target".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 691(2012):97-108.