Mangu Aashrita, Westbrook Benjamin, Beckman Shawn, Corbett Lance, Crowley Kevin T, Dutcher Daniel, Johnson Bradley R, Lee Adrian T, Kabra Varun, Prasad Bhoomija, Staggs Suzanne T, Suzuki Aritoki, Wang Yuhan, Zheng Kaiwen
University of California, Berkeley, Berkeley, CA USA.
University of California, San Diego, San Diego, CA USA.
J Low Temp Phys. 2025;218(1-2):21-28. doi: 10.1007/s10909-024-03234-7. Epub 2024 Nov 15.
The Simons Observatory (SO) is a cosmic microwave background (CMB) experiment located in the Atacama Desert in Chile that will make precise temperature and polarization measurements over six spectral bands ranging from 27 to 285 GHz. Three small aperture telescopes (SATs) and one large aperture telescope (LAT) will house 60,000 detectors and cover angular scales between one arcminute and tens of degrees. We present the performance of the dichroic, low-frequency (LF) lenslet-coupled sinuous antenna transition-edge sensor (TES) bolometer arrays with bands centered at 27 and 39 GHz. The LF focal plane will primarily characterize Galactic synchrotron emission as a critical part of foreground subtraction from CMB data. We will discuss the design, optimization, and current testing status of these pixels.
西蒙斯天文台（SO）是一项位于智利阿塔卡马沙漠的宇宙微波背景（CMB）实验，它将在27至285吉赫兹的六个光谱波段上进行精确的温度和偏振测量。三台小孔径望远镜（SAT）和一台大孔径望远镜（LAT）将容纳60000个探测器，并覆盖从1角分到几十度的角尺度范围。我们展示了中心频率为27和39吉赫兹波段的二向色性、低频（LF）微透镜耦合蜿蜒天线过渡边缘传感器（TES）测辐射热计阵列的性能。低频焦平面将主要表征银河系同步辐射发射，这是从CMB数据中减去前景的关键部分。我们将讨论这些像素的设计、优化和当前测试状态。
