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

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    1802.01427v2.pdf
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    Genre
    Pre-print
    Date
    2018-10-01
    Author
    Agnes, P
    Albuquerque, IFM
    Alexander, T
    Alton, AK
    Asner, DM
    Ave, MP
    Back, HO
    Baldin, B
    Batignani, G
    Biery, K
    Bocci, V
    Bonfini, G
    Bonivento, W
    Bossa, M
    Bottino, B
    Budano, F
    Bussino, S
    Cadeddu, M
    Cadoni, M
    Calaprice, F
    Caminata, A
    Canci, N
    Candela, A
    Caravati, M
    Cariello, M
    Carlini, M
    Carpinelli, M
    Catalanotti, S
    Cataudella, V
    Cavalcante, P
    Cavuoti, S
    Chepurnov, A
    Cicalò, C
    Cocco, AG
    Covone, G
    D'Angelo, D
    D'Incecco, M
    D'Urso, D
    Davini, S
    De Candia, A
    De Cecco, S
    De Deo, M
    De Filippis, G
    De Rosa, G
    De Vincenzi, M
    Demontis, P
    Derbin, AV
    Devoto, A
    Di Eusanio, F
    Di Pietro, G
    Dionisi, C
    Edkins, E
    Fan, A
    Fiorillo, G
    Fomenko, K
    Franco, D
    Gabriele, F
    Gabrieli, A
    Galbiati, C
    Ghiano, C
    Giagu, S
    Giganti, C
    Giovanetti, GK
    Goretti, AM
    Granato, F
    Gromov, M
    Guan, M
    Guardincerri, Y
    Gulino, M
    Hackett, BR
    Herner, K
    Hughes, D
    Humble, P
    Hungerford, EV
    Ianni, A
    James, I
    Johnson, TN
    Keeter, K
    Kendziora, CL
    Kochanek, I
    Koh, G
    Korablev, D
    Korga, G
    Kubankin, A
    Kuss, M
    Li, X
    Lissia, M
    Loer, B
    Longo, G
    Ma, Y
    Machado, AA
    Machulin, IN
    Mandarano, A
    Mari, SM
    Maricic, J
    Martoff, CJ
    Messina, A
    Meyers, PD
    Milincic, R
    Monte, A
    Show allShow less
    Subject
    Electron diffusion constant
    Liquid argon
    Time projection chamber
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/4392
    
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    DOI
    10.1016/j.nima.2018.06.077
    Abstract
    © 2018 Elsevier B.V. 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 39Ar 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 DL, which we find to be (4.12 ± 0.09) cm2/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) cm2/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.
    Citation to related work
    Elsevier BV
    Has part
    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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    For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/4374
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