Oral Presentation

Design of Multi-Color Large Field of View Camera for XSMT Based on Kinetic Inductance Detectors (Remote)

Author(s): Jie Hu (PMO) Zheng Lou (PMO) Wei Geng (PMO) Qiang Zhi (PMO) Zhi Li (PMO), Kamgmin Zhou(PMO), Zheng Wang (PMO), Zhen-Hui Lin (PMO), Qi-Jun Yao (PMO), Jing Li (PMO), and Sheng-Cai Shi (PMO)

Presenter: Jie Hu (Purple Mountain Observatory, CAS)

In this presentation, we describe the design of a wide-field kinetic-inductance-detector (KID) camera for the 15-m XueShanMuChang Telescope (XSMT) under construction in Delingha, Qinghai, China. The instrument provides a 14″ field of view at an effective focal ratio of f/2.8 and operates in three switchable bands centered at 230, 345, and 460 GHz. Operationally, the 345 GHz band runs continuously, with the 460 GHz band scheduled under good weather conditions and the 230 GHz band used otherwise. Each configuration employs a 190-mm-diameter focal plane comprising seven horn-coupled lumped-element KID arrays with Hilbert-curve meanders, yielding ~10,000 pixels in total: 1,519 at 230 GHz, 3,283 at 345 GHz, and 5,719 at 460 GHz. The switchable optics enable rapid band changes and efficient use of observing conditions.