Simons Observatory large aperture telescope receiver design overview

Simons Observatory large aperture telescope receiver design overview
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西蒙斯天文台大口径望远镜接收器设计概述

DOI:
10.1117/12.2312871
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发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Thornton R
Thornton R
中科院分区:
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文献类型:
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作者:
Thornton R

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西蒙斯天文台将使用一系列望远镜对宇宙微波背景进行精确的温度和偏振测量,这些望远镜的角度范围在1角分至数十度之间,采样频率在27至270千兆赫之间。在这里,我们提出了目前的设计大口径望远镜接收器(LATR),2.4米直径的低温恒温器,将安装在SO 6米望远镜,将是最大的CMB接收器的日期。低温恒温器的尺寸被选择为利用具有高斯特列尔比的大焦平面面积,这是克罗斯-德拉戈内望远镜设计所固有的。LATR将能够容纳13个光学管,每个光学管具有36厘米直径的孔径,并照亮数千个过渡边缘传感器(TES)测辐射热计。这套设备将提供一个以无与伦比的灵敏度进行测量的机会。然而,LATR的规模和复杂性也带来了许多技术挑战。在下面的论文中,我们介绍了LATR的设计,并包括我们如何应对这些挑战。我们在设计LATR的过程中开发的解决方案将为一般CMB社区和未来的CMB实验(如CMB-S4)提供信息。
The Simons Observatory (SO) will make precision temperature and polarization measurements of the cosmic microwave background (CMB) using a series of telescopes which will cover angular scales between one arcminute and tens of degrees and sample frequencies between 27 and 270 GHz. Here we present the current design of the large aperture telescope receiver (LATR), a 2.4m diameter cryostat that will be mounted on the SO 6m telescope and will be the largest CMB receiver to date. The cryostat size was chosen to take advantage of the large focal plane area having high Strehl ratios, which is inherent to the Cross-Dragone telescope design. The LATR will be able to accommodate thirteen optics tubes, each having a 36 cm diameter aperture and illuminating several thousand transition-edge sensor (TES) bolometers. This set of equipment will provide an opportunity to make measurements with unparalleled sensitivity. However, the size and complexity of the LATR also pose numerous technical challenges. In the following paper, we present the design of the LATR and include how we address these challenges. The solutions we develop in the process of designing the LATR will be informative for the general CMB community, and for future CMB experiments like CMB-S4.
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