ASO-S卫星HXI量能器探测单元的标定

Calibration of the Detector Units of the Spectrometer of the Hard X-ray Imager Payload Onboard the ASO-S Mission

先进天基太阳天文台卫星(Advanced Space-based Solar Observatory,ASO-S)是中国科学院第2批空间科学先导专项之一,其主要目标是同时观测太阳磁场、耀斑和日冕物质抛射,并对3者之间的相互关系和内在联系进行研究.硬X射线成像仪(HXI)是ASOS卫星的3大载荷之一,它通过对太阳活动发射的硬X射线进行傅里叶调制成像,实现高空间分辨率和高时间分辨率的太阳能谱成像观测.量能器单机是HXI的关键单机之一,其主要任务是精准测量通过每对光栅后太阳硬X射线的能量和通量.主要介绍了量能器单机的工作原理及其关键指标要求、标定设备及标定方案,最后给出了标定结果,从而验证了量能器单机方案设计的合理性.

The Advanced Space-based Solar Observatory(ASO-S)is one of the projects within the framework of the strategic priority program stage II(SPPII)on space science of the Chinese Academy of Sciences.The most important scientific goals of ASO-S are to study the relationships between the solar magnetic field,solar flares,and coronal mass ejections(CMEs).The Hard X-ray Imager(HXI)is one of the three payloads onboard ASO-S,it can obtain high spatial resolution and high cadence solar spectral imaging observations by Fourier modulation imaging of hard X-ray emitted by solar flares.The spectrometer is a core component of the HXI,whose main task is to precisely measure the energy and flux of solar hard X-ray passing through a grating pair.This paper presents the principle,key requirements,calibration equipment,and calibration scheme of the spectrometer.Finally,the calibration results are given to verify the correctness of the design of the spectrometer.