Measurement on the desorption yields of ceramic and Au-coated ceramic irradiated with Bi32+and Xe23+

doi:10.1016/j.vacuum.2021.110636

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	Measurement on the desorption yields of ceramic and Au-coated ceramic irradiated with Bi32+and Xe23+
	Xie, W. J.1,2,3; Meng, J.2,3,4; Li, C. C.2,4; Jiao, J. Q.2; Chai, Z.2,4; Luo, C.1,2,3,4; Yang, W. S.2,3,4; Shen, G. D.2,3; Li, Z. S.2,3; Zhou, D. T.2
刊名	VACUUM
	2021-12
卷号	194
关键词	HIAF Desorption yields Ceramic Beam cleaning effect
ISSN号	0042-207X
DOI	10.1016/j.vacuum.2021.110636
英文摘要	The Booster Ring (BRing) is the key part of the High Intensity Heavy Ion Accelerator Facility (HIAF). In order to reduce the eddy current effect, specifically developed stainless steel vacuum chambers with ultra-thin (0.3 mm) walls and ceramic spacers will be used. Desorption yields experiments were carried out on spacers made of zirconia ceramic, on zirconia ceramic coated with different Au thicknesses and coating processes, as well as on zirconia ceramic coated with getter films. A dedicated mass spectrometer was used to analyze the changes in the gas composition during the bombardment. The results show that Au-coated zirconia ceramic can effectively lower the desorption yields, the higher the Au coating thickness, the lower the desorption yield. When the beam impinges on the surface of the zirconia ceramic, the pressure randomly fluctuates, without showing any clear long term beam cleaning effect. As far as the coating process is concerned, samples coated by magnetron sputtering show higher desorption yields than those electroplated. However, the electroplating process is characterized by a low bonding force between the films and the ceramic substrate, which makes possible for the film to peel off under beam bombardment. Finally, TiN-coated zirconia ceramic has better static vacuum performances. However, due to its strong H2 absorption capacity, TiN coated samples will release more H2 under bombardment, thus providing a worse dynamic vacuum conditions. Practical consequences for the BRing vacuum system of the HIAF are given.
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000705986500001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/149980]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou 730050, Peoples R China; 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China; 3.Huizhou Res Ctr Ion Sci, Huizhou 516003, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xie, W. J.,Meng, J.,Li, C. C.,et al. Measurement on the desorption yields of ceramic and Au-coated ceramic irradiated with Bi32+and Xe23+[J]. VACUUM,2021,194.
APA	Xie, W. J..,Meng, J..,Li, C. C..,Jiao, J. Q..,Chai, Z..,...&Li, C..(2021).Measurement on the desorption yields of ceramic and Au-coated ceramic irradiated with Bi32+and Xe23+.VACUUM,194.
MLA	Xie, W. J.,et al."Measurement on the desorption yields of ceramic and Au-coated ceramic irradiated with Bi32+and Xe23+".VACUUM 194(2021).