Arcminute Cosmology Bolometric Array Receiver

建议的工作将继续利用在南极站运行的ACBAR(弧光宇宙学测辐射热计阵列接收器)仪器对宇宙微波背景(CMB)各向异性和Sunyaev-Zel‘dovich效应(SZE)进行研究。由于其稳定的大气和极低的水蒸气，南极是进行这一观测计划的最著名的陆地地点。该仪器本身是一个16元测辐射热计阵列，工作在0.03℃，专门为观测CMB各向异性和SZE而设计。它将在跨越毫米到亚毫米波长的大气窗口中运行；扩大观测各向异性的光谱范围对于将宇宙微波背景信号与前景污染分开是必要的。该仪器结合了灵敏的探测器、高角度分辨率和广泛的频率覆盖范围，将在几个方面促进宇宙学研究。该项目将确定星系团的特殊速度(星系团相对于CMB静止框架的运动)，将原始CMB各向异性的测量扩展到小角度尺度，并作为更大角度尺度上的气球和卫星飞行任务的自然补充。***

0091840HolzapfelThe proposed work will continue a study of the cosmic microwave background (CMB) anisotropies and the Sunyaev-Zel'dovich effect (SZE) with the ACBAR (Arcminute Cosmology Bolometer Array Receiver) instrument, operating at South Pole station. Because of its stable atmosphere and extremely low water vapor, the South Pole is the best known terrestrial site from which to carry out this program of observations. The instrument itself is a sixteen element bolometer array, operating at 0.03 deg K, designed specifically for observations of CMB anisotropy and the SZE. It will operate in atmospheric windows spanning millimeter to submillimeter wavelengths; extending the spectral range over which observations of anisotropies are made is necessary to separate cosmic microwave background signals from foreground contamination. The combination of sensitive detectors, high angular resolution, and broad frequence coverage the instrument will advance cosmology research on several fronts. The project will determine cluster peculiar velocities (the motion of galaxy clusters with respect to the rest frame of the CMB), extend measurements of primordial CMB anisotropies to small angular scales, and serve as a natural complement to balloon and satellite missions at larger angular scales. ***