Continuing Observations with DASI: CMB Anistropy Polarization and Fine Scale Structure

该项目将继续利用阿蒙森-斯科特南极站的角度尺度干涉仪进行宇宙学观测。 DASI仪器目前正在提供宇宙微波背景辐射各向异性的测量，测量范围涵盖宇宙微波背景辐射功率谱的前三个声学峰值。 功率谱的形状，特别是峰值的间距，提供了一个潜在的宇宙几何形状的清晰测量。 其他DASI研究包括测量当前未检测到的CMB各向异性的偏振。 这些信息将对宇宙的早期结构提供关键性的检验。 此外，接收器将被重新配置为更高的频率，以测量细尺度各向异性和CMB各向异性功率谱的尾部。 教育和推广工作将与DASI的重新配置、测试、观测和分析同时进行;作为这项工作的一部分，正在开发一个关于射电望远镜的本科生实践课程，计划在更新的第一年举办一个教师讲习班。 项目完成后一年内，将公开所有经过简化和校准的数据，并对其进行充分说明。

This project will continue cosmological observations with the Degree Angular Scale Interferometer (DASI) at the Amundsen-Scott South Pole station. The DASI instrument is currently providing measurements of the cosmic microwave background (CMB) radiation anisotropy over a range of scales that span the first three acoustic peaks in the CMB power spectrum. The shape of the power spectrum, in particular the spacing of the peaks, provides a potentially clean measure of the geometry of the universe. Other DASI studies include the measuring of currently undetected polarization of the CMB anisotropy. This information will provide a critical test of the early structure of the universe. Also, the receiver will be reconfigured for higher frequencies in order to measure the fine scale anisotropy and the tail of the CMB anisotropy power spectrum. Education and outreach efforts will proceed in parallel with DASI reconfiguration, testing, observing, and analysis; an undergraduate hands-on course on radio telescopes is being developed as part of this work, with a teachers workshop planned for the first year of this renewal. All reduced and calibrated data, fully described, will be publicly available within one year after the completion of the project.