论文标题
Qubic VIII:光学设计和性能
QUBIC VIII: Optical design and performance
论文作者
论文摘要
宇宙学(Qubic)的Q和U骨测量仪是一个基于地面的实验,旨在在CMB中检测B模式极化各向异性,在L = 100重组峰周围的角度尺度上。系统的错误使得基于地面的B模式在毫米波长处的B模式非常具有挑战性,Qubic通过使用辐射测定法的新技术来以某种互补的方式缓解这些问题。该技术利用了成像仪的灵敏度和干涉仪的系统误差控制。冷反光的光学组合器将其从两个焦平面上的400个孔径饲养角从中叠加的光束叠加。组成固定地面壳的屏蔽系统,以及用仪器移动的前肢,限制了当地污染物的影响。本文描述了光学组件的建模,设计,制造和初步测量。
The Q and U Bolometric Interferometer for Cosmology (QUBIC) is a ground-based experiment that aims to detect B-mode polarisation anisotropies in the CMB at angular scales around the l=100 recombination peak. Systematic errors make ground-based observations of B modes at millimetre wavelengths very challenging and QUBIC mitigates these problems in a somewhat complementary way to other existing or planned experiments using the novel technique of bolometric interferometry. This technique takes advantage of the sensitivity of an imager and the systematic error control of an interferometer. A cold reflective optical combiner superimposes there-emitted beams from 400 aperture feedhorns on two focal planes. A shielding system composedof a fixed groundshield, and a forebaffle that moves with the instrument, limits the impact of local contaminants. The modelling, design, manufacturing and preliminary measurements of the optical components are described in this paper.