Field scanner design for MUSTANG of the Green Bank Telescope

作     者：MASON Brian 

作者机构：National Radio Astronomy ObservatoryCharlottesville 22903USA 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 10978021) 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学 力学 天文学(英文版))

年 卷 期：2011年第54卷第11期

页      码：2091-2096页

摘      要：MUSTANG (Multiplex SQUID TES Array at Ninety GHz) is a bolometer camera for the Green Bank Telescope (GBT) working at a frequency of 90 *** detector has a field of view of 40 *** cancel out random emission change from atmosphere and other sources,requires a fast scanning reflecting system with a few arcminute *** this paper,the aberrations of an off-axis system are *** condition for an optimized system is *** an optimized system,as additional image transfer mirrors are introduced,new aberrations of the off-axis system may be reintroduced,resulting in a limited field of *** this paper,different scanning mirror arrangements for the GBT system are analyzed through the ray tracing *** include using the subreflector as the scanning mirror,chopping a flat mirror and transferring image with an ellipse mirror,and chopping a flat mirror and transferring image with a pair of face-to-face paraboloid *** system analysis shows that chopping a flat mirror and using a well aligned pair of paraboloids can generate the required field of view for the MUSTANG detector system,while other systems all suffer from larger off-axis aberrations added by the system *** spot diagrams of the well aligned pair of paraboloids produced are only about one Airy disk size within a scanning angle of about 3 arcmin.

主 题 词：antenna optics off-axis linear astigmatism coma reflector scanner 

学科分类：08[工学] 0805[工学-能源动力学] 0704[理学-天文学类] 0803[工学-仪器类] 

核心收录：

D　O　I：10.1007/s11433-011-4477-8

馆 藏 号：203864092...