Dr. Dengyi Chen Profile

Dr. Dengyi Chen

at Purple Mountain Observatory CAS

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Proceedings Article | 11 September 2024 Poster + Paper

Design and ground characterization of HXI collimator onboard Chinese ASO-S mission

Dengyi Chen, Hao-Xiang Wang, Yi-Ming Hu, Yang Su, Xian-Kai Jiang, Wei Liu, Yan Zhang, Yong-qiang Zhang, Wei Chen, Zhe Zhang

Proceedings Volume 13094, 1309450 (2024) https://doi.org/10.1117/12.3025268

KEYWORDS: Modulation, Hard x-rays, Collimators, Calibration, Solar energy, Astronomical spectrometers

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The Advanced Space-based Solar Observatory (ASO-S) was successfully sent to space from Jiuquan Launch center on Oct. 9, 2022. The ASO-S is dedicated to study solar flares, corneal mass eruptions and their connections with solar magnetic field and configured three instruments: a Full-disk solar vector MagnetoGraph (FMG), a Lyman-alpha Solar Telescope (LST), and a solar Hard X-ray Imager (HXI). Until Dec. 2023, the ASO-S has smoothly operated at 720 kilometers above Earth’s surface in a Sun-synchronous orbit for one more year. The HXI is one of the three key parts in this mission and adopts a spatial modulation technique to indirectly achieve image of solar hard X-rays. It is made up of a collimator, a spectrometer and an electrical control box. As the critical component, the collimator is responsible for incident X-ray modulation. This paper presents detailed design of HXI, especially the core part -- collimator. Secondly, ground tests, including characterization and spatial environmental tests of HXI collimator will be reported accounted for its indirect imaging principle. We will put forward some newly on-orbit results in the past one year. All design and test result as well as on orbit performance verifies that this equipment fully completed its expected goal and even presents a more wonderful status over expectations.

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