Searching for the Dark Matter Wind in DarkSide-20k

在 DarkSide-20k 中寻找暗物质风

• 批准号: 2755221
• 金额: --
• 依托单位: Royal Holloway University of London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2755221
• 关键词: Searching; Dark; Matter; Wind; DarkSide

A variety of astrophysical observations indicate that 85% of the matter in the universe is 'dark', and the nature of these dark matter particles is unknown. Motion of the Earth through the dark matter halo of our galaxy produces an apparent wind of dark matter particles blowing opposite to the Earth's motion, with sidereal modulation in the dark matter wind direction as the Earth rotates. Detectors capable of direction-sensitive detection can search for this modulation, which would enable unambiguous identification of dark matter candidate interactions as coming from the galactic dark matter halo. The DarkSide-20k detector employs a 50 tonne time projection chamber filled with liquid argon extracted from underground, instrumented with silicon photomultiplier (SiPM) readout, to search for dark matter interactions. This project will search for evidence of dark matter interactions in the silicon of the SiPM array, whose structure gives sensitivity to search for the sidereal modulation effect for interactions in the silicon.

各种天体物理观测表明，宇宙中85%的物质是“暗”的，而这些暗物质粒子的性质是未知的。地球通过银河系暗物质晕的运动产生了明显的暗物质粒子风，与地球的运动相反，随着地球旋转，暗物质风的方向会发生恒星调制。具有方向敏感探测能力的探测器可以搜索这种调制，这将使暗物质候选相互作用的明确识别来自银河系暗物质晕。DarkSide-20 k探测器采用了一个50吨的时间投影室，充满了从地下提取的液态氩，配备了硅光电倍增管（SiPM）读数，以寻找暗物质的相互作用。该项目将在SiPM阵列的硅中寻找暗物质相互作用的证据，其结构为寻找硅中相互作用的恒星调制效应提供了灵敏度。