QUBIC III：实验室表征
QUBIC III: Laboratory Characterization
摘要：
Q & U宇宙学测辐射热干涉仪（QUBIC）的原型在巴黎的天体粒子物理和宇宙学实验室进行了测试。我们报告的结果，这一技术演示成功地显示了可行性的原理测辐射热干涉。QUBIC的表征包括合成光束的测量、干涉条纹的测量和偏振特性的测量。在望远镜远场用一个频率可调的调制毫米波源模拟点源。QUBIC指向在点源上扫描以产生波束图。偏振调制使用旋转半波片测量。测量的光束与理论模拟吻合良好，使QUBIC能够进行光谱成像。该器件具有优良的偏振特性，交叉偏振抑制小于0.5%。QUBIC已准备好部署在阿根廷Alto Chorillo的高海拔地点，开始科学运作。
英文摘要：
A prototype version of the Q & U Bolometric Interferometer for Cosmology (QUBIC) underwent a campaign of testing in the laboratory at Astroparticle Physics and Cosmology in Paris. We report the results of this Technological Demonstrator which successfully shows the feasibility of the principle of Bolometric Interferometry. Characterization of QUBIC includes the measurement of the synthesized beam, the measurement of interference fringes, and the measurement of polarization performance. A modulated and frequency tunable millimetre-wave source in the telescope far-field is used to simulate a point source. The QUBIC pointing is scanned across the point source to produce beam maps. Polarization modulation is measured using a rotating Half Wave Plate. The measured beam matches well to the theoretical simulations and gives QUBIC the ability to do spectro imaging. The polarization performance is excellent with less than 0.5\% cross-polarization rejection. QUBIC is ready for deployment on the high altitude site at Alto Chorillo, Argentina to begin scientific operations.
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