蜘蛛最佳化：探索大规模B模式实验的系统学
Spider Optimization: Probing the Systematics of a Large Scale B-Mode Experiment
摘要：
Spider是一种长时间的球载偏振计，设计用于测量大尺度宇宙微波背景（CMB）偏振，具有非常高的灵敏度和系统学控制。该仪器将在96至275千兆赫的四个频带中以I、Q和U斯托克斯参数的角分辨率绘制半边天空。蜘蛛号的最终目标是探测到烙印在CMB B模式偏振上的原始重力波信号。实现这一目标的挑战之一是最大限度地减少系统效应对B模式的污染。本文探讨了一些仪器系统和观察策略，以优化B模式的灵敏度。这是通过在一组模拟的时间流中注入真实振幅、时变系统来完成的。测试的影响，检测器噪声特性，指向抖动，有效载荷双折射，偏振角偏移，光束系统和接收机增益漂移。Spider的默认观测策略是在方位角上连续旋转，通过快速旋转的半波片或快速旋转的吊舱和缓慢步进的半波片来实现偏振调制。虽然后者更容易受到系统学的影响，但这里显示的结果表明，Spider可以使用任何一种操作模式。
英文摘要：
Spider is a long-duration, balloon-borne polarimeter designed to measure large scale Cosmic Microwave Background (CMB) polarization with very high sensitivity and control of systematics. The instrument will map over half the sky with degree angular resolution in I, Q and U Stokes parameters, in four frequency bands from 96 to 275 GHz. Spider's ultimate goal is to detect the primordial gravity wave signal imprinted on the CMB B-mode polarization. One of the challenges in achieving this goal is the minimization of the contamination of B-modes by systematic effects. This paper explores a number of instrument systematics and observing strategies in order to optimize B-mode sensitivity. This is done by injecting realistic-amplitude, time-varying systematics in a set of simulated time-streams. Tests of the impact of detector noise characteristics, pointing jitter, payload pendulations, polarization angle offsets, beam systematics and receiver gain drifts are shown. Spider's default observing strategy is to spin continuously in azimuth, with polarization modulation achieved by either a rapidly spinning half-wave plate or a rapidly spinning gondola and a slowly stepped half-wave plate. Although the latter is more susceptible to systematics, results shown here indicate that either mode of operation can be used by Spider.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
