论文标题
耶鲁大学对轴突冷暗物质敏感（Haystac），改进的合成信号注入常规
An improved synthetic signal injection routine for the Haloscope At Yale Sensitive To Axion Cold dark matter (HAYSTAC)
论文作者
论文摘要
微波腔卤代是最敏感的直接检测实验之一，通过耦合到光子来搜索暗物质轴。当由于轴 - 光子转换引起的预期微波信号的功率在$ 10^{ - 24} $ 〜W的订单时，通过注入逼真的合成轴承信号来验证检测器响应和分析过程的能力变得有用。在这里，我们提出了一种基于在微波腔卤代实验中合成轴承信号的频率扩散频谱的方法。它使我们能够在频率空间中产生狭窄且不对称的形状，该形状模仿轴的光谱分布，该光谱分布源自麦克斯韦 - 波尔兹曼分布。此外，我们表明可以根据系统噪声对合成轴的功率进行校准。与Haystac I期的合成轴轴注射相比，我们证明了具有更逼真的线形和校准功率的合成信号注入。
Microwave cavity haloscopes are among the most sensitive direct detection experiments searching for dark matter axions via their coupling to photons. When the power of the expected microwave signal due to axion-photon conversion is on the order of $10^{-24}$~W, having the ability to validate the detector response and analysis procedure by injecting realistic synthetic axion signals becomes helpful. Here we present a method based on frequency hopping spread spectrum for synthesizing axion signals in a microwave cavity haloscope experiment. It allows us to generate a narrow and asymmetric shape in frequency space that mimics an axion's spectral distribution, which is derived from a Maxwell-Boltzmann distribution. In addition, we show that the synthetic axion's power can be calibrated with reference to the system noise. Compared to the synthetic axion injection in HAYSTAC phase I, we demonstrated synthetic signal injection with a more realistic lineshape and calibrated power.
