Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams

doi:10.1016/j.nima.2019.03.058

	Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams
	Litvinov, Yuri A.4; Chen, Rui-Jiu 2,4; Yan, Xin-Liang1,2 ; Yuan, Jian-Dong2 ; Zhang, Yu-Hu2 ; Wang, Shao-Ming2 ; Yuan, You-Jin2 ; Cai, Guo-Zhu2 ; Zhang, Min 2,3; Lu, Zi-Wei2
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
	2019-07-01
卷号	931 页码:52-59
关键词	TOF detectors Velocity measurement Ultra-thin carbon foil Ultra-high vacuum Laser range-finder ps-pulsed UV laser
ISSN号	0168-9002
DOI	10.1016/j.nima.2019.03.058
通讯作者	Yan, Xin-Liang(yanxinliang08@impcas.ac.cn) ; Wang, Meng(wangm@impcas.ac.cn)
英文摘要	The Isochronous Mass Spectrometry (IMS) is a powerful tool for mass measurements of exotic nuclei with half-lives as short as several tens of micro-seconds in storage rings. In order to improve the mass resolving power while preserving the acceptance of the storage ring, the IMS with two Time-Of-Flight (TOF) detectors has been implemented at the storage ring CSRe in Lanzhou, China. Additional velocity information beside the revolution time in the ring can be obtained for each of the stored ions by using the double TOF detector system. In this paper, we introduced a new method of using a 658 nm laser range finder and a short-pulsed ultra-violet laser to directly measure the distance and time delay difference between the two TOF detectors which were installed inside the 10(-11) mbar vacuum chambers. The results showed that the distance between the two ultra-thin carbon foils of the two TOF detectors was ranging from 18032.5 mm to 18035.0 mm over a measurable area of 20x20 mm(2). Given the measured distance, the time delay difference which comes with signal cable length difference between the two TOF detectors was measured to be Delta t(delay1-2) = 99(26) ps. The new method has enabled us to use the speed of light in vacuum to calibrate the velocity of stored ions in the ring. The velocity resolution of the current double TOF detector system at CSRe was deduced to be sigma(v)/v = 4.4 x 10(-4) for laser light, mainly limited by the time resolution of the TOF detectors.
资助项目	NSFC, China[11605248] ; NSFC, China[11605252] ; NSFC, China[11711540016] ; National Key R&D Program of China[2016YFA0400504] ; National Key R&D Program of China[2018YFA0404400] ; Key Research Program of the Chinese Academy of Sciences[XDPB09] ; Helmholtz-CAS Joint Research Group, Germany[HCJRG-108] ; External Cooperation Program of the CAS, China[GJHZ1305] ; European Research Council (ERC), United States under the European Union[682841] ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics[DE-AC-06CH11357] ; FRIB-CSC Fellowship, China[201704910964] ; Office of China Postdoctoral Council
WOS关键词	ISOCHRONOUS MASS-SPECTROMETRY ; TRANSITION ENERGY GAMMA(T) ; LIVED EXOTIC NUCLEI ; PROJECT ; ISOTOPES ; PHYSICS ; MODE ; IONS
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:000466151600006
资助机构	NSFC, China ; National Key R&D Program of China ; Key Research Program of the Chinese Academy of Sciences ; Helmholtz-CAS Joint Research Group, Germany ; External Cooperation Program of the CAS, China ; European Research Council (ERC), United States under the European Union ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics ; FRIB-CSC Fellowship, China ; Office of China Postdoctoral Council
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/133593]
专题	中国科学院近代物理研究所
通讯作者	Yan, Xin-Liang; Wang, Meng
作者单位	1.Argonne Natl Lab, 9700 S Cass Ave, Lemont, IL 60439 USA 2.Chinese Acad Sci, Inst Modern Phys, 509 Nanchang Rd, Lanzhou 730000, Gansu, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.GSI Helmholtzzentrum Schwerionenforsch, Planckstr 1, D-64291 Darmstadt, Germany
推荐引用方式 GB/T 7714	Litvinov, Yuri A.,Chen, Rui-Jiu,Yan, Xin-Liang,et al. Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2019,931:52-59.
APA	Litvinov, Yuri A..,Chen, Rui-Jiu.,Yan, Xin-Liang.,Yuan, Jian-Dong.,Zhang, Yu-Hu.,...&Wang, Meng.(2019).Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,931,52-59.
MLA	Litvinov, Yuri A.,et al."Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 931(2019):52-59.