测热干涉测量演示仪
A demonstrator for bolometric interferometry
摘要：
测辐射热干涉术（BI）是精确测量宇宙微波背景偏振的最有前途的技术之一。在本文中，我们提出的DIBO（演示d'Interferometrie Bolometrique），一个单基线演示器工作在90 GHz，证明BI的概念适用于毫米波干涉仪的有效性。该仪器已在实验室中，其特征在于在室温下的检测器和4 K测辐射热计。这使我们能够以一种干净的方式测量干涉图样，包括（1）旋转光源和（2）随时间变化两个干涉仪臂之间的相移。详细的建模也进行了验证与测量。
英文摘要：
Bolometric Interferometry (BI) is one of the most promising techniques for precise measurements of the Cosmic Microwave Background polarization. In this paper, we present the results of DIBO (Demonstrateur d'Interferometrie Bolometrique), a single-baseline demonstrator operating at 90 GHz, built to proof the validity of the BI concept applied to a millimeter-wave interferometer. This instrument has been characterized in the laboratory with a detector at room temperature and with a 4 K bolometer. This allowed us to measure interference patterns in a clean way, both (1) rotating the source and (2) varying with time the phase shift among the two interferometer's arms. Detailed modelisation has also been performed and validated with measurements.
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