Phased Array Feed Experiments and Galactic HI Observations  

作　　者：B.Liu H.W.Xi D.J.Ding Z.W.Wang S.H.Yu Y.Zhu L.Yu X.Zhang J.L.Li L.J.Liu Q.Su Y.Wu C.J.Jin B.Peng 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]Key Laboratory of Radio Astronomy and Technology,Chinese Academy of Sciences,Beijing 100101,China [3]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [4]The 54th Research Institute of China Electronic Technology Group Cooperation,Shijiazhuang 050081,China

出　　处：《Research in Astronomy and Astrophysics》2023年第8期297-307,共11页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China under grant No.2018YFA0404703;the Open Project Program of the Key Laboratory of FAST,NAOC,Chinese Academy of Sciences。

摘　　要：The Phased Array Feed(PAF)is considered as one of the next generation receivers for radio telescopes,which can significantly enlarge the instantaneous Field-of-View of large aperture single dish radio telescopes and enable more flexible observing configurations.Study efforts on PAF development for radio telescopes have been made for more than two decades and have become more and more applicable.We report the development of an ambient-temperature 19 element L-band PAF system and the experimental results including its far field beam pattern and system temperature measurement,which achieve the expectations.Implementing the aperture array beam-forming method,we demonstrate a wide-field Galactic HI observations in the radio camera mode.The results indicate that this system might be applicable for strong Galactic transient detections.This system could be directly equipped to large telescopes like the Five-hundred-meter Aperture Spherical radio Telescope(FAST)and FAST array in the future.

关 键 词：INSTRUMENTATION detectors-techniques imaging spectroscopy-line profiles 

分 类 号：P156[天文地球—天文学]