X/ Gamma-ray成像光谱仪（THESEUS）的设计、主要特性和工作原理
The X/Gamma-ray Imaging Spectrometer (XGIS) on-board THESEUS: design, main characteristics, and concept of operation
摘要：
THESEUS是欧空局在其宇宙视觉科学计划中选择的第五个中等任务（M5）候选者的三个任务之一，目前正在A阶段研究中进行评估，计划于2032年发射。THESEUS设计用于携带两个宽深天空监测仪器，用于X/伽马射线瞬变探测：具有成像能力的宽视场软X射线监视器（软X射线成像仪，SXI，0.3 - 5 keV），硬X射线，部分成像光谱仪（X和伽马成像光谱仪，XGIS，2 keV - 10 MeV），以及具有成像和光谱能力的光学/近红外望远镜（红光望远镜，IRT，0.7 - 1.8 $μ$ m）。该航天器将能够执行快速重定向的IRT提供的监测器的错误区域，从而使其能够检测和定位的瞬态源下降到几个角秒的精度，立即识别和红移的测定。XGIS的主要目标将是检测瞬态源，监测时间尺度低至毫秒，独立于或跟随SXI检测，并识别在< 15弧分处执行定位的源，并在宽能带上对其进行表征，从而为其发射物理学提供独特的线索。XGIS系统由两个独立但相同的编码掩模相机组成，布置成覆盖2球面度。XGIS将采用一种创新技术，将硅漂移探测器（SDD）与晶体闪烁体棒和非常低噪声的分布式前端电子设备相结合（ORION ASIC），它将产生位置敏感探测平面，在巨大的能带上有很大的有效面积（从软X射线到软伽马射线），时间分辨率低至几个$μ$。这里介绍了XGIS仪器设计、配置和能力
英文摘要：
THESEUS is one of the three missions selected by ESA as fifth medium class mission (M5) candidates in its Cosmic Vision science program, currently under assessment in a phase A study with a planned launch date in 2032. THESEUS is designed to carry on-board two wide and deep sky monitoring instruments for X/gamma-ray transients detection: a wide-field soft X-ray monitor with imaging capability (Soft X-ray Imager, SXI, 0.3 - 5 keV), a hard X-ray, partially-imaging spectroscopic instrument (X and Gamma Imaging Spectrometer, XGIS, 2 keV - 10 MeV), and an optical/near-IR telescope with both imaging and spectroscopic capability (InfraRed Telescope, IRT, 0.7 - 1.8 $μ$m). The spacecraft will be capable of performing fast repointing of the IRT to the error region provided by the monitors, thus allowing it to detect and localize the transient sources down to a few arcsec accuracy, for immediate identification and redshift determination. The prime goal of the XGIS will be to detect transient sources, with monitoring timescales down to milliseconds, both independently of, or following, up SXI detections, and identify the sources performing localisation at < 15 arcmin and characterize them over a broad energy band, thus providing also unique clues to their emission physics. The XGIS system consists of two independent but identical coded mask cameras, arranged to cover 2 steradians . The XGIS will exploit an innovative technology coupling Silicon Drift Detectors (SDD) with crystal scintillator bars and a very low-noise distributed front-end electronics (ORION ASICs), which will produce a position sensitive detection plane, with a large effective area over a huge energy band (from soft X-rays to soft gamma-rays) with timing resolution down to a few $μ$s.Here is presented an overview of the XGIS instrument design, its configuration, and capabilities.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
