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首页> 外文会议>Solar Physics and Space Weather Instrumentation II; Proceedings of SPIE-The International Society for Optical Engineering; vol.6689 >First light for the Bowen fluorescence spatial heterodyne spectrometer at Millstone Hill Observatory
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First light for the Bowen fluorescence spatial heterodyne spectrometer at Millstone Hill Observatory

机译：Millstone Hill天文台的Bowen荧光空间外差光谱仪的第一束光

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摘要

Neutral oxygen (O I) is a dominant species between about 250 and 500 km in the thermosphere. A complete thermospheric model requires measurements of the species density ([O]) to incorporate into forward models. One way to measure [O] is to detect Bowen fluorescence at triplet 844.6 nm. Bowen fluorescence is generated when thermospheric oxygen absorbs Solar Lyman-β and de-excites through a path eventually leading to 844.6 nm emission. This emission must be distinguished from the brighter 844.6 nm emission caused by photoelectron (PE) impact, which can be done by measuring the intensity ratio between two branches of the 844.6 triplet. An instrument to measure Mid-latitude Bowen fluorescence has been installed at Millstone Hill Observatory. The instrument is a Spatial Heterodyne Spectrometer (SHS), a novel type of Fourier transform spectrometer. This SHS was first used to observe Na Fraunhofer lines from dayglow at 589 nm, and is to be turned to the 844.6 region. With simple readjustments, it can also be reset for other visible and near IR wavelengths.
机译：在热圈中，中性氧（O I）是约250至500 km之间的主要物质。完整的热层模型需要对物质密度（[O]）进行测量才能纳入正向模型。一种测量[O]的方法是在三重峰844.6 nm处检测Bowen荧光。当热层氧气吸收太阳Lyman-β并通过最终导致844.6 nm发射的路径去激发时，会产生Bowen荧光。此发射必须与光电子（PE）撞击导致的更明亮的844.6 nm发射区分开，这可以通过测量844.6三重态的两个分支之间的强度比来完成。 Millstone Hill天文台已安装了测量中纬度Bowen荧光的仪器。该仪器是一种空间外差光谱仪（SHS），一种新型的傅立叶变换光谱仪。该SHS首先用于从589 nm的日光观测Na Fraunhofer谱线，并将其转向844.6区域。通过简单的调整，也可以将其重置为其他可见和近红外波长。

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