Collaborative Research: Analysis of data from the QUaD experiment

合作研究：QUaD 实验数据分析

• 批准号: 0739413
• 负责人: Clement Pryke
• 金额: $ 7万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-04-01 至 2010-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0739413&HistoricalAwards=false
• 关键词: Collaborative; Research; Analysis; data; QUaD

The proposal seeks support to complete the analysis of data from the QUaD experiment located at the U.S. Amundsen-Scott South Pole Station in 2005-2007. QUaD is a 31-pixel polarization-sensitive bolometric camera mounted on a 2.6 meter Cassegrain telescope, which was making maps of the polarization in the Cosmic Microwave Background (CMB) radiation on angular scales from 5 angular minutes to 2 degrees. Recently released results from the first season of observations (2005) improve any previous results obtained by individual small angular scale experiments. A second successful season of data taking (2006) is now complete and data are in an advanced state of the analysis. The third observational season (2007) just completed and the data are undergoing initial checks, characterization of ground spillover and mitigation of its effects by appropriate filters in Fourier space. As processed and analyzed, these data will produce most precise measurements of the CMB polarization spectra in the multipoles range 200-2000. This will permit a detailed test of whether scalar fluctuations in the early Universe were adiabatic as predicted by the simplest inflationary models, or whether there were significant amounts of isocurvature fluctuations. QUaD also serves as a pathfinder for many of the modern observational techniques that will be needed by future experiments, probing systematic effects that must be confronted in the quest to detect the faint polarization signature from tensor modes.

该提案寻求支持，以完成对2005-2007年在美国阿蒙森-斯科特南极站进行的QUaD实验数据的分析。QUaD是安装在2.6米卡塞格伦望远镜上的31像素偏振敏感测辐射热相机，该望远镜正在绘制从5角分到2度的角度尺度上的宇宙微波背景辐射（CMB）中的偏振图。最近发布的第一季观测结果（2005年）改进了以前通过单个小角度尺度实验获得的任何结果。第二个成功的数据采集季节（2006年）现已完成，数据分析已进入后期阶段。第三个观测季节（2007年）刚刚结束，目前正在对数据进行初步检查，并通过傅立叶空间中的适当滤波器确定地面溢出的特征和减轻其影响。经过处理和分析，这些数据将产生在多极范围200-2000的CMB偏振光谱的最精确的测量。这将允许详细测试早期宇宙中的标量波动是否如最简单的暴胀模型所预测的那样是绝热的，或者是否存在大量的等曲率波动。QUaD还可以作为未来实验所需的许多现代观测技术的探路者，探测在探测张量模式微弱偏振特征时必须面对的系统效应。