Oral Presentation

Electronic design and performance test of the prime focus camera of Wide Field Survey Telescope

Author(s): hui wang（State Key Laboratory of Particle Detection and Electronics, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;）

Presenter: hui Wang (中国科学技术大学)

The Wide Field Survey Telescope (WFST) is a 2.5 m aperture survey telescope jointly funded by the University of Science and Technology of China（USTC）and the Purple Mountain Observatory（PMO）of the Chinese Academy of Sciences. The telescope is located at Saishiteng Mountain near Lenghu Town in Qinghai Province, with an average altitude of about 4200 meters and a median seeing of 0.75 arcseconds. The telescope is expected to be completed in August this year, and is expected to become the most powerful equipment in the Northern Hemisphere to survey the sky and promote the research of time domain astronomy in China.
As a very important part of the telescope, the camera needs to achieve high-quality imaging and low-noise readout. The focal plane diameter of WFST reaches 325 mm, and many detectors are stitched to form the imaging plane, of which nine 9*9k pixels CCD290-99 are used as scientific imaging, surrounded by eight 4k*4k pixels CCD250-82 as wavefront sensor and four 1k*1k pixels CCD47-20 as guide. Camera electronics need to readout the image data of 21 CCDs, a total of 216 channels, and in order to improve the efficiency of sky surveys, a faster readout rate is needed, which poses a challenge to the design of camera electronics. This report will present the electronic design of the WFST prime focus camera and the results of performance test.