Suggested quasi-Cassegrain system for multi-beam observation of FAST
文献类型：期刊论文
| 作者 | Su DQ(苏定强) ; Bai H(白华); Cui XQ(崔向群)
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| 刊名 | Research in Astronomy and Astrophysics
 |
| 出版日期 | 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 |
| 源URL | [http://ir.niaot.ac.cn/handle/114a32/1783]  |
| 专题 | 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. |
入库方式： OAI收割
来源：南京天文光学技术研究所
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