On-site performance of GroundBIRD, a CMB polarization telescope for large angular scale observations
On-site performance of GroundBIRD, a CMB polarization telescope for large angular scale observations
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用于大角度尺度观测的 CMB 偏振望远镜 GroundBIRD 的现场性能
DOI：
10.1117/12.2560918
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
et.al.
中科院分区：
文献类型：
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作者：
Honda S.,Choi J.;Genova-Santos R. T.;Hattori M.;et.al.
GroundBird是一个毫米波望远镜，用于观测宇宙微波背景的偏振模式。目标科学主题是宇宙暴胀和再电离光学深度的原始引力波。因此，这台望远镜的设计是为了在大角度范围内达到最高的灵敏度，θ = 6 - 300。对于宽天空观测（~40%全天空），以高转速（120°/s）扫描对于消除大气波动很重要。微波动力学电感探测器（MKID）具有良好的时间响应特性，可用于快速旋转的GroundBird。我们已经在加那利群岛的泰德天文台开始试运行。我们报告的望远镜，接收器和数据采集系统的性能，包括冷却的成就，观测的天文物体，并在我们的主要调查观察前几天采取的意见。
GroundBIRD is a millimeter-wave telescope to observe the polarization patterns of the cosmic microwave background (CMB). The target science topics are primordial gravitational waves from cosmic inflation and reionization optical depth. Therefore, this telescope is designed to achieve the highest sensitivity at large angular scales, ℓ = 6 - 300. For wide sky observations (~40% full-sky), scanning at a high rotation speed (120°/s) is important to remove atmospheric fluctuations. Microwave kinetic inductance detector (MKID) is utilized with the fast GroundBIRD rotation since its good time response. We have started the commissioning run at the Teide Observatory in the Canary Islands. We report the performance of the telescope, receiver, and data acquisition system, including cooling achievements, observations of astronomical objects, and observations taken during several days ahead of our main survey observations.