The vacuum system of the China spallation neutron source

doi:10.1016/j.vacuum.2018.04.046

	The vacuum system of the China spallation neutron source
	Liu SH(刘盛画); Tan B(谭彪); Ma YS(马永胜); Sun, XY; Liu SM(刘顺明); Liu, SH; Liu, JM; Liu, SM; Guan, YH; Wang, PC
刊名	VACUUM
	2018
卷号	154 页码:75-81
关键词	Spallation neutron source Vacuum system Ceramic vacuum chamber Titanium nitride (TiN) Secondary electron yield (SEY)
ISSN号	0042-207X
DOI	10.1016/j.vacuum.2018.04.046
文献子类	Article
英文摘要	The china spallation neutron source (CSNS) is designed to accelerate pulse proton beams to 1.6 GeV kinetic energy with a beam power of 100 kW at 25 Hz repetition frequency, which are used to strike a solid metal target to produce spallation neutrons. We describe the structure features, technical requirements, design scheme and experimental results of each part of the CSNS vacuum system. The alumina ceramic constructed of isostatically pressed methods is chosen as the material of the dipole and quadrupole vacuum chambers as a result of the rapid cycling magnetic field in the rapid cycling synchrotron (RCS), which were welded by glazing and metallizing, respectively. The inner surfaces of the ceramic chambers were coated with TiN using the magnetron sputtering method in order to reduce the secondary electron yield (SEY); the radio frequency (RF) shielding copper strips were covered around the outer surfaces of the ceramic chambers by a kapton film to decrease the impedance of the image current. The CSNS vacuum system has been installed and tested; an average static pressure of 1.3 x 10(-7) Pa was achieved in the RCS. The average dynamic pressure was 1.1 x 10(-6) Pa when the first beam power reached the national acceptance target of 10 kW at 25 Hz.
WOS关键词	ELECTRON EMISSION YIELDS ; CERAMICS ; RCS
WOS研究方向	Materials Science ; Physics
语种	英语
WOS记录号	WOS:000438000300014
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286101]
专题	高能物理研究所_加速器中心高能物理研究所_东莞分部中国科学院高能物理研究所_中国散裂中子源
通讯作者	Dong HY(董海义)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu SH,Tan B,Ma YS,et al. The vacuum system of the China spallation neutron source[J]. VACUUM,2018,154:75-81.
APA	刘盛画.,谭彪.,马永胜.,Sun, XY.,刘顺明.,...&Ma, YS.(2018).The vacuum system of the China spallation neutron source.VACUUM,154,75-81.
MLA	刘盛画,et al."The vacuum system of the China spallation neutron source".VACUUM 154(2018):75-81.