Transverse broadband impedance reduction techniques in a heavy ion accelerator

doi:10.1103/PhysRevAccelBeams.23.034402

	Transverse broadband impedance reduction techniques in a heavy ion accelerator
	Chen, X. Q.1,2,3; Zhu, G. Y.1,3; Caspers, F.4; Yang, J. C.1,3; Wu, J. X.1,3; Shen, G. D.1,3; Liu, J.1,3; Xia, J. W.1,3; Zhan, Y.1,3; Ruan, S.1,3
刊名	PHYSICAL REVIEW ACCELERATORS AND BEAMS
	2020-03-11
卷号	23 期号:3 页码:9
ISSN号	2469-9888
DOI	10.1103/PhysRevAccelBeams.23.034402
通讯作者	Zhu, G. Y.(zhuguangyu@impcas.ac.cn) ; Yang, J. C.(yangjch@impcas.ac.cn)
英文摘要	The transverse broadband impedances of major components in the BRing (booster ring) of HIAF (High Intensity Heavy-ion Accelerator Facility) are estimated using the analytical formulas or the wakefield solver in the CST Studio Suite. At low frequency, the transverse broadband impedance model of BRing is Z(1)(H)(omega) = -417.14i k Omega/m(horizontal) and Z(1)(V) (omega) -530.19i k Omega/m(vertical), which are larger than the threshold impedance for the transverse mode-coupling instability. The ceramic rings in the vacuum chamber are the primary source of impedance. With a goal of mitigating the instability by reducing the impedance of ceramic rings, a high conductivity coating is discussed in detail. In addition, a prototype of ceramic rings-loaded thin-wall vacuum chamber is manufactured and the impedance measurements are performed. When ceramic rings are coated by 2 mu m-copper, the CST simulation and experiment results show that the transverse broadband impedance of ceramic rings-loaded thin-wall vacuum chamber can be reduced from Z(1)(H)(omega) = -291.69i k Omega/m and Z(1)(V)(omega) -352.37i k Omega/m to Z(1)(H)(omega) = -46.16i k Omega/m and Z(1)(V)(omega) = -64.56i k Omega/m. Furthermore, in this case the transverse broadband impedance model of BRing is reduced by more than 50% to Z(1)(H)(omega) = -171.61i k Omega/m and Z(1)(V)(omega) = -242.38i k Omega/m.
资助项目	National Natural Science Foundation of China[11705253] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G373]
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000518994000004
资助机构	National Natural Science Foundation of China ; Guangdong Innovative and Entrepreneurial Research Team Program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140906]
专题	中国科学院近代物理研究所
通讯作者	Zhu, G. Y.; Yang, J. C.
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Huizhou Res Ctr Ion Sci, Huizhou 516003, Peoples R China 4.CERN, CH-1211 Geneva 23, Switzerland
推荐引用方式 GB/T 7714	Chen, X. Q.,Zhu, G. Y.,Caspers, F.,et al. Transverse broadband impedance reduction techniques in a heavy ion accelerator[J]. PHYSICAL REVIEW ACCELERATORS AND BEAMS,2020,23(3):9.
APA	Chen, X. Q..,Zhu, G. Y..,Caspers, F..,Yang, J. C..,Wu, J. X..,...&Gao, Y. Z..(2020).Transverse broadband impedance reduction techniques in a heavy ion accelerator.PHYSICAL REVIEW ACCELERATORS AND BEAMS,23(3),9.
MLA	Chen, X. Q.,et al."Transverse broadband impedance reduction techniques in a heavy ion accelerator".PHYSICAL REVIEW ACCELERATORS AND BEAMS 23.3(2020):9.