Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC
Electroluminescence pulse shape and electron diffusion in liquid argon measured in a dual-phase TPC
复制标题
双相 TPC 中测量的电致发光脉冲形状和液氩中的电子扩散
DOI:
10.1016/j.nima.2018.06.077
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Biery, K.
中科院分区:
文献类型:
--
作者:
Agnes, P.;Albuquerque, I.F. M.;Alexander, T.;Alton, A.K.;Asner, D.M.;Ave, M.P.;Back, H.O.;Baldin, B.;Batignani, G.;Biery, K.
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 39 Ar 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.
登录
查看更多内容
DOI:
--
发表时间:
1974
期刊:
--
影响因子:
--
作者:
L. Huxley;R. Crompton
通讯作者:
L. Huxley;R. Crompton
DOI:
--
发表时间:
1974
期刊:
影响因子:
--
作者:
J. Keto;R. Gleason;G. K. Walters
通讯作者:
G. K. Walters
影响因子:
1.3
作者:
Amsler, C.;Boccone, V.;Rochet, J.
通讯作者:
Rochet, J.
影响因子:
5.3
作者:
LOOSLI, HH
通讯作者:
LOOSLI, HH
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
I. Kovan;A. Chernov;D. Parsons
通讯作者:
D. Parsons