Calibration and first light of the Diabolo photometer at the millimetre and infrared Testa Grigia Observatory
Calibration and first light of the Diabolo photometer at the millimetre and infrared Testa Grigia Observatory
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毫米级和红外 Testa Grigia 天文台空竹光度计的校准和第一束光
DOI：
10.1051/aas:2000129
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
B. Vozzi
中科院分区：
文献类型：
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作者：
A. Benoit;F. Zagury;N. Coron;M. Petris;F. Désert;M. Giard;J. Bernard;J. Crussaire;G. Dambier;P. Bernardis;J. Delabrouille;A. D. Luca;P. Marcillac;G. Jegoudez;J. Lamarre;J. Leblanc;J. Lepeltier;B. Leriche;G. Mainella;J. Narbonne;F. Pajot;R. Pons;J. Puget;S. Pujol;G. Recouvreur;G. Serra;V. Soglasnova;J. Torre;B. Vozzi
我们已经设计并建立了一个大通量双通道光度计，空竹。该光度计专用于观测毫米级连续漫源，特别是Sunyaev-Zel'dovich效应和3 K背景的各向异性。我们描述的光学布局和过滤系统的仪器，它使用两个测辐射热探测器在两个频率通道在1.2和2.1毫米的同时观测。测辐射热计被冷却到工作温度为0.1\rm\，K$由一个紧凑的稀释低温恒温器提供。在实验室中测量了仪器的光度响应和角度响应。1995年3月，在新的毫米和红外Testa Grigia天文台（MITO）望远镜的焦点上发现了第一个天文光。建立的系统灵敏度为7\rm\，mK_{RJ}\ s^{1/2}$。对于至少10个波束的典型地图，每个波束积分一小时，在冬季条件下，可以获得$y_{\rm SZ} \simeq 7\ 10^{-5}$的均方根值和3 K背景各向异性${\Delta T\over T} \simeq 7\ 10^{-5}$。我们还报告了一种新的测辐射热计交流读出电路，它允许第一次在天空中的总功率测量。这种技术禁止（但不禁止）使用次镜像进行斩波。这种技术和稀释冰箱的概念将用于未来的扫描调制空间仪器，如欧空局普朗克使命项目。
We have designed and built a large-throughput dual channel photometer, Diabolo. This photometer is dedicated to the observation of millimetre continuum diffuse sources, and in particular, of the Sunyaev-Zel'dovich effect and of anisotropies of the 3 K background. We describe the optical layout and filtering system of the instrument, which uses two bolometric detectors for simultaneous observations in two frequency channels at 1.2 and 2.1 mm. The bolometers are cooled to a working temperature of $0.1 \rm\,K$ provided by a compact dilution cryostat. The photometric and angular responses of the instrument are measured in the laboratory. First astronomical light was detected in March 1995 at the focus of the new Millimetre and Infrared Testa Grigia Observatory (MITO) Telescope. The established sensitivity of the system is of $7 \rm\,mK_{RJ}\ s^{1/2}$. For a typical map of at least 10 beams, with one hour of integration per beam, one can achieve the rms values of $y_{\rm SZ} \simeq 7\ 10^{-5}$ and the 3 K background anisotropy ${\Delta T\over T} \simeq 7\ 10^{-5}$, in winter conditions. We also report on a novel bolometer AC readout circuit which allows for the first time total power measurements on the sky. This technique alleviates (but does not forbid) the use of chopping with a secondary mirror. This technique and the dilution fridge concept will be used in future scan-modulated space instrument like the ESA PLANCK mission project.