Operation of Multibeam Receiver of Delingha 13.7m Telescope

Delingha 13.7m telescope is one of the most important radio telescopes in China. Since installing superconducting spectroscopic array receiver (SSAR) and adopting On The Fly (OTF) observation mode, the telescope has operated for nearly 10 years. During this period, a large number of astronomical observation projects have been carried out and completed, a large amount of astronomical data has been observed, and a series of important scientific research results have been achieved. This paper introduces the operation status of SSAR in astronomical observation, the problems in operation, the phenomena of faults and solutions. The performance test and performance analysis of SSAR are described in detail, including receiver noise temperature and telescope system noise temperature, image rejection ratio (IRR), receiver stability, beam performance and so on. The update and development of SSAR is listed, including the automatic adjustment of LO (Local Oscillator) power, the updating of pre-amplification circuit of sideband separation superconducting mixer, and the optimization of control program, etc. This paper summarizes the experience and rules, and connects the past with the future, and applies the experience of maintenance and operation of SSAR to the next generation of large-scale receiver system.