Detection and suppression of the trapped-electrons-transportation-type flashover in a linear accelerator

doi:10.1088/1402-4896/ac0c91

	Detection and suppression of the trapped-electrons-transportation-type flashover in a linear accelerator
	Liu,Xinmeng 4; He,Yuan 3; Li,Yongming 2; Guo,Hao 3; Ren,Chengyan 1; Gao,Zheng 3; Jiang,Tiancai 3; Xue,Zongheng 3
刊名	Physica Scripta
	2021-07-02
卷号	96 期号:10 页码:7
关键词	trapped electrons transportation flashovers superconducting accelerator field emission
ISSN号	0031-8949
DOI	10.1088/1402-4896/ac0c91
通讯作者	He,Yuan()
英文摘要	Abstract The polarization energy relaxation around trapped electrons type of flashover happened in the Superconducting Demo Linac of the China Initiative Accelerator Driven Subcritical System project, which greatly limited the acceleration capability of the accelerator. This problem seriously affects the stability of accelerator operation and becoming the most urgent issue to be solved. From the reticulated and radial traces through the inner and outer conductors on the electrical aging windows of the RF couplers, the surface discharge or flashover was inferred from the pick-up couplers. The simulation of field-emission electron trajectory in the superconducting cavity and the online monitoring of the flashover signal showed that the discharge occurred by the bombardment and accumulation of field-emission electrons from the cavity. Therefore, the antenna of the pick-up coupler was redesigned and applied to the Linac. The new design removed the abnormal signal caused by discharges during more than one year operation of the cavity, thereby improving the acceleration capability and stability performance of the accelerator.
资助项目	National Science Fund for Distinguished Young Scholars[11525523]
WOS关键词	INSULATORS ; EMISSION ; VACUUM
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0031-8949-96-10-AC0C91
资助机构	National Science Fund for Distinguished Young Scholars
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136976]
专题	中国科学院近代物理研究所
通讯作者	He,Yuan
作者单位	1.Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China 2.GLVAC Industrial Technology Research Institute of High Power Devices, Kunshan 215333, People’s Republic of China 3.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China 4.School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
推荐引用方式 GB/T 7714	Liu,Xinmeng,He,Yuan,Li,Yongming,et al. Detection and suppression of the trapped-electrons-transportation-type flashover in a linear accelerator[J]. Physica Scripta,2021,96(10):7.
APA	Liu,Xinmeng.,He,Yuan.,Li,Yongming.,Guo,Hao.,Ren,Chengyan.,...&Xue,Zongheng.(2021).Detection and suppression of the trapped-electrons-transportation-type flashover in a linear accelerator.Physica Scripta,96(10),7.
MLA	Liu,Xinmeng,et al."Detection and suppression of the trapped-electrons-transportation-type flashover in a linear accelerator".Physica Scripta 96.10(2021):7.