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arXiv 0806.4334astro-ph
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QUIET -使用相干探测器阵列测量CMB偏振

QUIET - Measuring the CMB polarization with coherent detector arrays

Dorothea Samtleben

摘要:

膨胀在CMB极化模式中的足迹预计比当前极化测量的极限低一个数量级以上。大型接收器阵列是强制性的,以达到所需的灵敏度。我们在这里描述的Q/U成像实验(QUIET),将使用相干探测器阵列的方法。伪相关接收机已在40(90)GHz的小批量生产的芯片封装。2008年在智利的阿塔卡马沙漠部署了第一批19(91)个接收器的阵列,预计未来将扩大到$\sim$ 1000个接收器。这两个频率和选择具有最小前景和与其他即将进行的实验的良好重叠的观察区域将使得能够检测张量与标量的比率$r\sim10^{-2}$。

英文摘要:

The footprint of inflation in the polarization pattern of the CMB is expected at more than an order of magnitude below the limits of current polarization measurements. Large receiver arrays are mandatory for achieving the required sensitivity. We describe here the approach of the Q/U Imaging ExperimenT (QUIET) which will use coherent detector arrays. Pseudo-correlation receivers have been produced at 40 (90) GHz in small massproducable chip packages. Deployment of the first arrays with 19 (91) receivers is taking place in 2008 in the Atacama Desert in Chile and an expansion to $\sim$1000 receivers is foreseen for the future. The two frequencies and the selection of observing regions with minimal foreground and good overlap with other upcoming experiments will enable the detection of tensor to scalar ratios $r\sim10^{-2}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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