MCI: Multi-Channel Imager on the Chinese Space Station Survey Telescope
Zhen-Ya Zheng, Chun Xu, Xiaohua Liu, Yong-He Chen, Fang Xu, Hu Zhan, Xinfeng Li, Lixin Zheng, Huanyuan Shan, Jing Zhong, Zhaojun Yan, Fang-Ting Yuan, Chunyan Jiang, Xiyan Peng, Wei Chen, Xue Cheng, Zhen-Lei Chen, Shuairu Zhu, Lin Long, Xin Zhang, Yan Gong, Li Shao, Wei Wang, Tianyi Zhang, Guohao Ju, Chenghao Li, Wei Wang, Zhiyuan Li, Tao Wang, Junfeng Wang, Chengyuan Li, Bin Ma, Jianguo Wang, Lei Wang, Dezi Liu, Nie Lin, Kexin Li, Xinrong Wen, Maochun Wu, Ruqiu Lin, Xiang Ji
Published: 2025/9/18
Abstract
The Multi-Channel Imager (MCI) is a powerful near-ultraviolet (NUV) and visible imager onboard the Chinese Space Station Survey Telescope (CSST). The MCI provides three imaging channels, which are the NUV channel, the Optical-blue channel and the Optical-red channel, with the wavelength range of 255-430 nm, 430-700 nm, and 700-1000 nm, respectively. The three channels can target the same field simultaneously. Each channel employs a CCD focal plane of 9216 x 9232 pixels and $\sim$7.5 x 7.5 arcmin$^2$ field of view. The MCI's three channels feature unprecedented sensitivities and field of views, as well as rich filter sets, which complements the NUV and visible capabilities of the CSST for the high-precision photometry, the weak-signal detection, and the related sciences. Here we present key design features, results of current ground tests, and suggested observing strategies of the MCI.