论文标题
地鸟：MKID阵列的CMB极化实验
GroundBIRD : A CMB polarization experiment with MKID arrays
论文作者
论文摘要
地鸟是一个基于地面的实验，用于精确观察宇宙微波背景（CMB）的极化。为了在大角度上实现高灵敏度，我们在该实验中采用了三个特征：快速旋转扫描，微波动力电感检测器（MKID）和冷光学元件。旋转扫描策略具有抑制$ 1/f $噪声的优势。它还提供了40 \％的大型天空覆盖率，这对应于$ l \ sim 6 $的大角度尺度。这使我们能够使用低$ l $ b-Mode Spectrum来限制张量与尺寸的比率。该焦平面由两个目标频率，145 GHz和220 GHz频段组成7个MKID阵列。总共有161个像素，其中138个用于144 GHz，23个用于220 GHz。该阵列目前正在开发中，原型将很快在望远镜中评估。地鸟望远镜将在Teide天文台观察CMB。望远镜从日本转移到特内里费岛，现在正在测试中。我们介绍了地鸟实验的状态和计划。
GroundBIRD is a ground-based experiment for the precise observation of the polarization of the cosmic microwave background (CMB). To achieve high sensitivity at large angular scale, we adopt three features in this experiment: fast rotation scanning, microwave kinetic inductance detector (MKID) and cold optics. The rotation scanning strategy has the advantage to suppress $1/f$ noise. It also provides a large sky coverage of 40\%, which corresponds to the large angular scales of $l \sim 6$. This allows us to constrain the tensor-to-scalar ratio by using low $l$ B-mode spectrum. The focal plane consists of 7 MKID arrays for two target frequencies, 145 GHz and 220 GHz band. There are 161 pixels in total, of which 138 are for 144 GHz and 23 are for 220 GHz. This array is currently under development and the prototype will soon be evaluated in telescope. The GroundBIRD telescope will observe the CMB at the Teide observatory. The telescope was moved from Japan to Tenerife and is now under test. We present the status and plan of the GroundBIRD experiment.
