用于稀有事件探测的低扩散 Xe-He 气体混合物：电致发光产额
仪器与探测器
2019-11-27 v3 应用物理
摘要
基于次级闪烁（电致发光）信号放大的高压氙气时间投影室（TPC）正被提出用于稀有事件探测，如方向性暗物质、双电子俘获和双贝塔衰变探测。相较于单液相或双相 TPC，此类 TPC 通过原电离径迹的拓扑特征来甄别稀有事件是一项主要优势，其主要限制在于纯氙中的高电子扩散。氦气与氙气的混合可显著减少电子扩散，从而提高这些光学 TPC 的甄别效率。我们测量了 Xe-He 混合物在 0 至 30% He 范围内的电致发光（EL）产额，并证明添加氦气对纯氙 EL 产额影响很小。在闪烁区典型的 2.5 kV/cm/bar 约化电场下，对于 10%、15%、20% 和 30% 的氦浓度，EL 产额分别降低约 2%、3%、6% 和 10%。该下降幅度小于文献中最新模拟框架所得结果。在实验不确定度范围内，添加氦气对 EL 统计涨落的影响可忽略不计。本结果可作为未来基于 Xe-He 混合物的光学 TPC 所应用模拟工具的重要基准。
引用
@article{arxiv.1906.03984,
title = {Low-diffusion Xe-He gas mixtures for rare-event detection: Electroluminescence Yield},
author = {A. F. M. Fernandes and C. A. O. Henriques and R. D. P. Mano and D. González-Díaz and C. D. R. Azevedo and P. A. O. C. Silva and J. J. Gómez-Cadenas and E. D. C. Freitas and L. M. P. Fernandes and C. M. B. Monteiro and C. Adams and V. Álvarez and L. Arazi and I. J. Arnquist and K. Bailey and F. Ballester and J. M. Benlloch-Rodríguez and F. I. G. M. Borges and N. Byrnes and S. Cárcel and J. V. Carríon and S. Cebrían and E. Church and C. A. N. Conde and T. Contreras and J. Díaz and G. Díaz and M. Diesburg and J. Escada and R. Esteve and R. Felkai and P. Ferrario and A. L. Ferreira and J. Generowicz and S. Ghosh and A. Goldschmidt and R. Guenette and R. M. Gutiérrez and J. Haefner and K. Hafidi and J. Hauptman and J. A. Hernando Morata and P. Herrero and V. Herrero and Y. Ifergan and S. Johnston and B. J. P. Jones and M. Kekic and L. Labarga and A. Laing and P. Lebrun and N. López-March and M. Losada and J. Martín-Albo and A. Martínez and G. Martínez-Lema and A. D. McDonald and F. Monrabal and F. J. Mora and J. Muñoz Vidal and P. Novella and D. R. Nygren and B. Palmeiro and A. Para and J. Pérez and F. Psihas and M. Querol and J. Renner and J. Repond and S. Riordan and L. Ripoll and Y. Rodríguez García and J. Rodríguez and L. Rogers and B. Romeo and C. Romo-Luque and F. P. Santos and J. M. F. dos Santos and A. Simón and C. Sofka and M. Sorel and T. Stiegler and J. F. Toledo and J. Torrent and A. Usón and J. F. C. A. Veloso and R. Webb and R. Weiss-Babai and J. T. White and K. Woodruff and N. Yahlali},
journal= {arXiv preprint arXiv:1906.03984},
year = {2019}
}