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arXiv 1609.04467physics.ins-dethep-ex
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用EXO-200探测器测量液体氙中电子的漂移速度和横向扩散

Measurement of the Drift Velocity and Transverse Diffusion of Electrons in Liquid Xenon with the EXO-200 Detector

200 Collaboration, J. B. Albert, P. S. Barbeau, D. Beck, V. Belov, M. Breidenbach, T. Brunner, A. Burenkov, G. F. Cao, W. R. Cen, C. Chambers, B. Cleveland, M. … 展开作者

200 Collaboration, J. B. Albert, P. S. Barbeau, D. Beck, V. Belov, M. Breidenbach, T. Brunner, A. Burenkov, G. F. Cao, W. R. Cen, C. Chambers, B. Cleveland, M. Coon, A. Craycraft, T. Daniels, M. Danilov, S. J. Daugherty, J. Daughhetee, J. Davis, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, T. Didberidze, J. Dilling, A. Dolgolenko, M. J. Dolinski, M. Dunford, W. Fairbank, J. Farine, S. Feyzbakhsh, P. Fierlinger, D. Fudenberg, R. Gornea, K. Graham, G. Gratta, C. Hall, M. Hughes, M. J. Jewell, A. Johnson, T. N. Johnson, S. Johnston, A. Karelin, L. J. Kaufman, R. Killick, T. Koffas, S. Kravitz, R. Krucken, A. Kuchenkov, K. S. Kumar, Y. Lan, D. S. Leonard, C. Licciardi, Y. H. Lin, R. MacLellan, M. G. Marino, B. Mong, D. Moore, O. Njoya, R. Nelson, A. Odian, I. Ostrovskiy, A. Piepke, A. Pocar, C. Y. Prescott, F. Retiere, P. C. Rowson, J. J. Russell, A. Schubert, D. Sinclair, E. Smith, V. Stekhanov, M. Tarka, T. Tolba, R. Tsang, K. Twelker, J. -L. Vuilleumier, A. Waite, J. Walton, T. Walton, M. Weber, L. J. Wen, U. Wichoski, J. Wood, L. Yang, Y. -R. Yen, O. Ya. Zeldovich, J. Zettlemoyer

摘要:

EXO-200协作组正在使用液体氙(LXe)时间投影室寻找无中微子双β衰变。这种测量依赖于对LC 12中相互作用产生的电荷沉积物的传输进行建模,以区分信号和背景事件。本文利用EXO-200数据测量了漂移场在20~ 615 V/cm之间的电子横向扩散常数和漂移速度。在380 V/cm的工作电场下,EXO-200测得的漂移速度为1.705 $_{-0.010}^{+0.014}$ mm/ $μ$ s,横向扩散系数为55 $\pm$ 4 cm $^2$ /s。

英文摘要:

The EXO-200 Collaboration is searching for neutrinoless double beta decay using a liquid xenon (LXe) time projection chamber. This measurement relies on modeling the transport of charge deposits produced by interactions in the LXe to allow discrimination between signal and background events. Here we present measurements of the transverse diffusion constant and drift velocity of electrons at drift fields between 20~V/cm and 615~V/cm using EXO-200 data. At the operating field of 380~V/cm EXO-200 measures a drift velocity of 1.705$_{-0.010}^{+0.014}$~mm/$μ$s and a transverse diffusion coefficient of 55$\pm$4~cm$^2$/s.

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