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arXiv 0802.2657astro-ph
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用CMBR测量宇宙微波背景辐射偏振

Measuring the Cosmic Microwave Background Radiation (CMBR) polarization with QUIET

Dorothea Samtleben

摘要:

即将进行的测量宇宙微波背景辐射(CMBR)的实验的一个主要目标是揭示偏振模式中膨胀的微妙特征,这需要前所未有的灵敏度和系统控制。由于单个接收器的灵敏度已经达到基本极限,未来的实验将利用大型接收器阵列,以显着提高灵敏度。在这里,我们介绍了Q/U成像实验(QUIET),它将使用基于HEMT的接收器芯片封装在90(40)GHz的阿塔卡马沙漠。计划在2008年初利用91(19)个接收器的原型阵列进行数据采集,预计将扩大到1 000个接收器。有了这两个频率和仔细选择的扫描区域,有希望有效地处理前景,并达到接近10 $^{-2}$的张量标量扰动的比率的灵敏度。

英文摘要:

A major goal of upcoming experiments measuring the Cosmic Microwave Background Radiation (CMBR) is to reveal the subtle signature of inflation in the polarization pattern which requires unprecedented sensitivity and control of systematics. Since the sensitivity of single receivers has reached fundamental limits future experiments will take advantage of large receiver arrays in order to significantly increase the sensitivity. Here we introduce the Q/U Imaging ExperimenT (QUIET) which will use HEMT-based receivers in chip packages at 90(40) GHz in the Atacama Desert. Data taking is planned for the beginning of 2008 with prototype arrays of 91(19) receivers, an expansion to 1000 receivers is foreseen. With the two frequencies and a careful choice of scan regions there is the promise of effectively dealing with foregrounds and reaching a sensitivity approaching 10$^{-2}$ for the ratio of the tensor to scalar perturbations.

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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