Arcminute Cosmology Bolometric Array Receiver

0091840 holzapfels提议的工作将继续研究宇宙微波背景（CMB）各向异性和Sunyaev-Zel'dovich效应（SZE）与ACBAR （Arcminute cosmic Bolometer Array Receiver）仪器，运行在南极站。由于其稳定的大气和极低的水蒸气，南极是进行这项观测计划的最著名的陆地地点。仪器本身是一个16元素的辐射热计阵列，工作温度为0.03 K，专门用于观测CMB各向异性和SZE。它将在毫米波到亚毫米波的大气窗口中工作；为了将宇宙微波背景信号与前景污染分离开来，必须扩大观测各向异性的光谱范围。该仪器结合了灵敏的探测器、高角度分辨率和宽频率覆盖，将在几个方面推进宇宙学研究。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，并在更大角度尺度上作为气球和卫星任务的自然补充。＊＊＊

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. ***