Searching for the Dark Matter Wind in DarkSide-20k

各种天体物理观测表明，宇宙中85%的物质都是“暗”的，而这些暗物质粒子的性质尚不得而知。地球通过银河系暗物质光环的运动产生了与地球运动相反的暗物质粒子的明显风，随着地球自转，暗物质风向的恒星调制。能够进行方向敏感探测的探测器可以搜索这种调制，这将使我们能够明确地识别暗物质候选相互作用来自银河系暗物质晕。Darkside-20k探测器使用了一个50吨重的时间投影室，里面装满了从地下提取的液态Ar，用硅光电倍增管(SiPM)读出仪器来搜索暗物质相互作用。该项目将在SiPM阵列的硅中寻找暗物质相互作用的证据，其结构赋予了搜索硅中相互作用的恒星调制效应的敏感性。

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.