Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC

doi:10.1016/j.nima.2018.06.077

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	Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC
	Unzhakov, EV; Agnes, P; Albuquerque, IFM; Alex; er, T; Alton, AK; Asner, DM; Ave, MP; Back, HO; Baldin, B
刊名	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
	2018
卷号	904 页码:23-34
关键词	Electron diffusion constant Liquid argon Time projection chamber
ISSN号	0168-9002
DOI	10.1016/j.nima.2018.06.077
文献子类	Article
英文摘要	We report the measurement of the longitudinal diffusion constant in liquid argon with the DarkSide-50 dual-phase time projection chamber. The measurement is performed at drift electric fields of 100 V/cm, 150 V/cm, and 200 V/cm using high statistics Ar-39 decays from atmospheric argon. We derive an expression to describe the pulse shape of the electroluminescence signal (S2) in dual-phase TPCs. The derived S2 pulse shape is fit to events from the uppermost portion of the TPC in order to characterize the radial dependence of the signal. The results are provided as inputs to the measurement of the longitudinal diffusion constant D-L, which we find to be (4.12 +/- 0.09) cm(2)/s for a selection of 140 keV electron recoil events in 200 V/cm drift field and 2.8 kV/cm extraction field. To study the systematics of our measurement we examine data sets of varying event energy, field strength, and detector volume yielding a weighted average value for the diffusion constant of (4.09 +/- 0.12) cm(2)/s. The measured longitudinal diffusion constant is observed to have an energy dependence, and within the studied energy range the result is systematically lower than other results in the literature.
电子版国际标准刊号	1872-9576
WOS关键词	TRANSPORT ; XENON ; AR-39
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
语种	英语
WOS记录号	WOS:000442083200004
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286228]
专题	高能物理研究所_粒子天体物理中心高能物理研究所_实验物理中心高能物理研究所_加速器中心
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	Unzhakov, EV,Agnes, P,Albuquerque, IFM,et al. Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2018,904:23-34.
APA	Unzhakov, EV.,Agnes, P.,Albuquerque, IFM.,Alex.,er, T.,...&杨长根.(2018).Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,904,23-34.
MLA	Unzhakov, EV,et al."Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 904(2018):23-34.