The QUIET Instrument
The QUIET Instrument
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安静的仪器
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Zwart
中科院分区：
文献类型：
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作者：
Q. C. C. Bischoff;A. Brizius;I. Buder;Y. Chinone;K. Cleary;R. N. Dumoulin;A. Kusaka;R. Monsalve;S. Naess;L. Newburgh;G. Nixon;R. Reeves;K. Smith;K. Vanderlinde;I. Wehus;M. Bogdan;R. Bustos;S. Church;R. Davis;C. Dickinson;H. Eriksen;T. Gaier;J. Gundersen;M. Hasegawa;M. Hazumi;C. Holler;K. Huffenberger;W. Imbriale;K. Ishidoshiro;M. Jones;P. Kangaslahti;D. Kapner;C. Lawrence;E. Leitch;M. Limon;J. McMahon;A. Miller;M. Nagai;H. Nguyen;T. Pearson;L. Piccirillo;Simon J. E. Radford;A. Readhead;J. Richards;D. Samtleben;M. Seiffert;M. Shepherd;S. Staggs;O. Tajima;K. Thompson;R. Williamson;B. Winstein;Edward J. Wollack;J. Zwart
Q/U成像实验（QUIET）旨在测量宇宙微波背景中的极化，目标是大角尺度（~ 1度）上暴胀引力波的印记。在2008年10月至2010年12月期间，两个独立的接收器阵列依次部署在1.4米侧馈龙望远镜上。形成焦平面的偏振计采用基于高电子迁移率晶体管（hemt）的高度紧凑设计，可在单个模块中同时测量斯托克斯参数Q， U和I。17元q波段偏振计阵列的中心频率为43.1 GHz，在该波段具有最佳灵敏度（69 uK sqrt(s)）和最低的仪器系统误差，张量标量比r < 0.1。84元w波段偏振计阵列在94.5 GHz中心频率下的灵敏度为87 uK sqrt(s)。它具有迄今为止最低的系统误差，贡献r < 0.01。这两个阵列一起覆盖范围为25-975的多极。这是迄今为止部署的最大的基于hemt的阵列。本文介绍了该仪器的设计、校准、性能和系统误差的来源。
The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the Cosmic Microwave Background, targeting the imprint of inflationary gravitational waves at large angular scales (~ 1 degree). Between 2008 October and 2010 December, two independent receiver arrays were deployed sequentially on a 1.4 m side-fed Dragonian telescope. The polarimeters which form the focal planes use a highly compact design based on High Electron Mobility Transistors (HEMTs) that provides simultaneous measurements of the Stokes parameters Q, U, and I in a single module. The 17-element Q-band polarimeter array, with a central frequency of 43.1 GHz, has the best sensitivity (69 uK sqrt(s)) and the lowest instrumental systematic errors ever achieved in this band, contributing to the tensor-to-scalar ratio at r < 0.1. The 84-element W-band polarimeter array has a sensitivity of 87 uK sqrt(s) at a central frequency of 94.5 GHz. It has the lowest systematic errors to date, contributing at r < 0.01. The two arrays together cover multipoles in the range l= 25-975. These are the largest HEMT-based arrays deployed to date. This article describes the design, calibration, performance of, and sources of systematic error for the instrument.