CCD290-99 prototype camera and proton irradiation test for the Earth 2.0’s microlensing telescope

Hui Wang; Qi Feng; Hong-fei Zhang; Jian Wang; Jie Gao; Jian Ge; Hui Zhang; Lin Wen; Yu-dong Li

doi:10.1117/12.3018251

23 August 2024 CCD290-99 prototype camera and proton irradiation test for the Earth 2.0’s microlensing telescope

Hui Wang, Qi Feng, Hong-fei Zhang, Jian Wang, Jie Gao, Jian Ge, Hui Zhang, Lin Wen, Yu-dong Li

Author Affiliations +

Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave; 1309245 (2024) https://doi.org/10.1117/12.3018251
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Earth2.0 is a space telescope mission proposed by Chinese scientists to search for exoplanets. It is scheduled for launch in 2027 and will operate in orbit around the Earth-Sun Lagrange point L2 for a minimum of 4 years. The mission includes six 28cm aperture, 550 square degree transit telescopes and one 35cm aperture, 4 square degree microlensing telescope. The microlensing telescope is aimed at the core area of the Milky Way's arm, and is expected to discover approximately 1,000 cold and wandering planets within four years. Currently, the microlensing telescope is considering using Teledyne e2v's CCD290 as the detector, with a focal plane consisting of a 2*2 detector mosaic. To conduct preliminary technical verification, a CCD290 prototype camera was designed and CCD290 performance characterization tests were carried out. Additionally, specific experiments were conducted to study the impact of space radiationontheCCD290 detector's performance through proton displacement damage irradiation. Following cumulative doses of3.072*10 10 p/cm2 and 6.792*10 10 p/cm2 of 60MeV proton irradiation, dark current, dark current non-uniformity, and charge transfer efficiency tests were performed on the CCD290. The test results indicated that after annealing at room temperature for 4 days and at 50°C for 7 days, the CCD performance showed partial restoration, highlighting the necessity of regular annealing in orbit.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hui Wang, Qi Feng, Hong-fei Zhang, Jian Wang, Jie Gao, Jian Ge, Hui Zhang, Lin Wen, and Yu-dong Li "CCD290-99 prototype camera and proton irradiation test for the Earth 2.0’s microlensing telescope", Proc. SPIE 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave, 1309245 (23 August 2024); https://doi.org/10.1117/12.3018251

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