On-Orbit Performance Analysis of the Hard X-ray Imager (HXI) on the Advanced Space-Based Solar Observatory (ASO-S)

IF 2.4 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Solar Physics Pub Date : 2025-07-24 DOI:10.1007/s11207-025-02514-z

Wei Liu, Haoxiang Wang, Zhe Zhang, Dengyi Chen, Yan Zhang, Yang Su, Wei Chen, Zhentong Li, Xiankai Jiang, Qiang Wan, Yiming Hu, Yu Huang

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Abstract

This study presents a detailed on-orbit performance analysis of the Hard X-ray Imager (HXI) aboard the Advanced Space-based Solar Observatory (ASO-S), confirming its overall stability within design specifications for key parameters like detection efficiency and energy resolution. However, the analysis focuses primarily on characterizing temporal variations, including distinct periodic fluctuations linked to orbital (∼ 99 minutes) and annual cycles, as well as non-periodic events. Temperature variations highlight orbital/seasonal effects and suggest potential long-term thermal leakage around the Solar Aspect System (SAS) via a gradual rise on the front plate. High-voltage (HV) remains stable during nominal operations, but its management during South Atlantic Anomaly (SAA) passages is critical. Gain analysis identifies a generally stable trend punctuated by five significant abrupt decreases attributed to operational parameter reset errors and radiation exposure during SAA passages (influenced by geomagnetic storms or operational choices). Detection efficiency and energy resolution remained largely stable, with notable deviations primarily linked to the parameter reset error. These findings demonstrate the instrument’s general robustness while highlighting specific anomalies and underscoring the need for ongoing monitoring, optimized operational protocols (especially HV management), and time-dependent calibration to ensure the highest data quality for solar flare science.

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先进天基太阳天文台（ASO-S）硬x射线成像仪在轨性能分析

本研究对先进天基太阳天文台（ASO-S）上的硬x射线成像仪（HXI）进行了详细的在轨性能分析，确认了其在检测效率和能量分辨率等关键参数的设计规范内的整体稳定性。然而，分析主要侧重于表征时间变化，包括与轨道周期（~ 99分钟）和年周期以及非周期性事件相关的明显周期性波动。温度变化突出了轨道/季节效应，并表明通过前板的逐渐上升，在太阳相位系统（SAS）周围存在潜在的长期热泄漏。高压（HV）在标称运行期间保持稳定，但在南大西洋异常（SAA）通道期间其管理至关重要。增益分析确定了一个总体稳定的趋势，其中有五个显著的突然下降，这是由于操作参数重置错误和SAA通道期间的辐射暴露（受地磁风暴或操作选择的影响）。检测效率和能量分辨率基本保持稳定，显著的偏差主要与参数重置误差有关。这些发现证明了该仪器的总体稳健性，同时强调了特定的异常情况，并强调了持续监测、优化操作协议（特别是高压管理）和时间相关校准的必要性，以确保太阳耀斑科学的最高数据质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Physics 地学天文-天文与天体物理

CiteScore

5.10

自引率

17.90%

发文量

146

审稿时长

1 months

期刊介绍： Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.