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In-situ plasma cleaning to decrease the field emission effect of half-wave superconducting radio-frequency cavities

文献类型：期刊论文

作者Zhao, Hongwei1; Chu, Qingwei1; Xiong, Pingran1,2; Guo, Hao1; Li, Yongming3; Li, Chunlong1; Huang, Shichun1; Hu, Chuanfei1,2; Yang, Lei1,2; Wu, Andong1,2
刊名NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
出版日期2018-10-11
卷号905页码:61-70
ISSN号0168-9002
关键词In-situ plasma cleaning Half-wave SRF cavity Optical emission spectra Contamination Field emission effect
DOI10.1016/j.nima.2018.07.039
英文摘要The in-situ plasma cleaning technique using the chemical reactive oxygen plasma to remove the hydrocarbon contaminants, the outmost layer of the inner surface of the HWR cavity, has been explored at Institute of Modern Physics, CAS. For the purpose of cleaning the HWR cavity in the cryomodule by plasma, an offline apparatus for the plasma discharge study was set up, which duplicates the assembly of the cavity inside the cryomodule. Plasma ignition procedures were investigated. And the plasma parameters such as free electron number density, electron temperature and dissociated oxygen atom intensity were diagnosed by optical emission spectra to optimize the operation conditions for plasma in-situ cleaning of the HWR cavity. To evaluate the efficiency of the plasma in-situ cleaning of the HWR cavity, the related experiments were carried out on the vertical test stand. The results show that the hydrocarbon contaminants on the inner surface of the cavity were removed, and the maximal available accelerating gradient of the cavity was improved by 29% due to the mitigation of field emission inside the cavity after plasma cleaning. Details of these experimental results and observations are discussed in this article.
WOS关键词SPECTROSCOPY ; TEMPERATURE ; DESIGN ; RF
资助项目National Natural Science Foundation for Young Scientists of China[11505255]
WOS研究方向Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000444425700008
源URL[http://119.78.100.186/handle/113462/59672]  
专题近代物理研究所_直线加速器中心
近代物理研究所_兰州重离子研究装置
通讯作者Li, Yongming; Huang, Shichun
作者单位1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.GLVAC Ind Technol Res Inst High Power Devices, Kunshan 215300, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Hongwei,Chu, Qingwei,Xiong, Pingran,et al. In-situ plasma cleaning to decrease the field emission effect of half-wave superconducting radio-frequency cavities[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2018,905:61-70.
APA Zhao, Hongwei.,Chu, Qingwei.,Xiong, Pingran.,Guo, Hao.,Li, Yongming.,...&Chen, Long.(2018).In-situ plasma cleaning to decrease the field emission effect of half-wave superconducting radio-frequency cavities.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,905,61-70.
MLA Zhao, Hongwei,et al."In-situ plasma cleaning to decrease the field emission effect of half-wave superconducting radio-frequency cavities".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 905(2018):61-70.

入库方式： OAI收割

来源：近代物理研究所

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