Suggested quasi-Cassegrain system for multi-beam observation of FAST
Su DQ(苏定强); Bai H(白华); Cui XQ(崔向群)
刊名Research in Astronomy and Astrophysics
2020-01
卷号20期号:1页码:3-7
英文摘要
FAST, the largest single-dish radio telescope in the world, has a 500-meter diametermain reflector and a 300-meter diameter illuminated area. It has amain reflector that can vary its shape, which continuously changes the shape of the illuminated area in reflector into a paraboloid. In this article, we propose a quasi-Cassegrain system for FAST. The detailed design results are provided. Such a quasi-Cassegrain system only needs to add a 14.6-meter diameter secondary reflector, which is close to the size of the feed cabin. The distance from the secondary reflector to the focus is only 5.08m, and it has excellent image quality. In this quasi-Cassegrain system, the shape of the illuminated area in the main reflector continuously changes into an optimized hyperboloid. Using this quasi-Cassegrain system from frequency 0.5GHz to 8GHz, the multi-beam system can include 7 to 217 feeds. If this system is used in combination with Phased Array Feed (PAF) technology, more multi-beam feeds or a higher working frequency can be used.
学科主题天文技术与方法
语种英语
内容类型期刊论文
源URL[http://ir.niaot.ac.cn/handle/114a32/1783]  
专题南京天文光学技术研究所_中科院南京天光所知识成果_期刊论文
作者单位南京天文光学技术研究所
推荐引用方式
GB/T 7714
Su DQ,Bai H,Cui XQ. Suggested quasi-Cassegrain system for multi-beam observation of FAST[J]. Research in Astronomy and Astrophysics,2020,20(1):3-7.
APA Su DQ,Bai H,&Cui XQ.(2020).Suggested quasi-Cassegrain system for multi-beam observation of FAST.Research in Astronomy and Astrophysics,20(1),3-7.
MLA Su DQ,et al."Suggested quasi-Cassegrain system for multi-beam observation of FAST".Research in Astronomy and Astrophysics 20.1(2020):3-7.
个性服务
查看访问统计
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。


©版权所有 ©2017 CSpace - Powered by CSpace