GREGOR法布里-珀罗干涉仪--一种新的高分辨率分光偏振太阳观测仪器
The GREGOR Fabry-Perot Interferometer - A New Instrument for High-Resolution Spectropolarimetric Solar Observations
摘要：
法布里-珀罗干涉仪比狭缝光谱仪具有优势，因为它们允许快速窄带成像和光谱偏振数据的事后图像重建。温度，等离子体速度和磁场的地图可以从光球和色球谱线的反演，从而，推进我们的动态太阳和它的磁场在最小的空间尺度的理解。格雷戈里-法布里-珀罗干涉仪（GFPI）是1.5米格雷戈里太阳望远镜的两个第一光仪器之一，该望远镜目前正在西班牙特内里费岛的泰德天文台投入使用。GFPI的运行接近GREGOR的衍射极限，因此，可以获得太阳表面小至60公里的精细结构。52“x 40”的视场足以覆盖有效区域的大部分。GFPI是一种可调双标准具系统，采用准直安装。它配备了全斯托克斯偏振计，可在530-860 nm波长范围内以R = 250，000的光谱分辨率记录分光偏振数据。大尺寸、高节奏的CCD探测器配备了强大的计算机硬件和软件，便于在与太阳特征演变时间尺度相对应的时间跨度内扫描谱线。我们介绍了GFPI的主要特点，包括软件、机械安装和光学方面的最新发展。
英文摘要：
Fabry-Perot interferometers have advantages over slit spectrographs because they allow fast narrow-band imaging and post-factum image reconstruction of spectropolarimetric data. Temperature, plasma velocity, and magnetic field maps can be derived from inversions of photospheric and chromospheric spectral lines, thus, advancing our understanding of the dynamic Sun and its magnetic fields at the smallest spatial scales. The GREGOR Fabry-Perot Interferometer (GFPI) is one of two firstlight instruments of the 1.5-meter GREGOR solar telescope, which is currently being commissioned at the Observatorio del Teide, Tenerife, Spain. The GFPI operates close to the diffraction limit of GREGOR, thus, providing access to fine structures as small as 60 km on the solar surface. The field-of-view of 52"x 40" is sufficiently large to cover significant portions of active regions. The GFPI is a tuneable dual-etalon system in a collimated mounting. Equipped with a full-Stokes polarimeter, it records spectropolarimetric data with a spectral resolution of R = 250,000 over the wavelength range from 530-860 nm. Large-format, high-cadence CCD detectors with powerful computer hard- and software facilitate scanning of spectral lines in time spans corresponding to the evolution time-scale of solar features. We present the main characteristics of the GFPI including the latest developments in software, mechanical mounts, and optics.
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