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24 February 2003 Studies of H Ly-α emissions in the solar neighborhood with the techniques of polarimetry and spatial heterodyne spectroscopy (SHS)
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Abstract
Ultraviolet astronomy is an important tool for the study of the interplanetary medium and diffuse, angularly extended emissions in planetary/comet atmospheres and their near space environments. We describe a new technique for high étendue observations of emission lines at R > 105 with an all-reflective spatial heterodyne spectrometer and polarmetric sampling of these lines with an ultraviolet optimized waveplate-Brewster mirror combination. The resulting system is themo-mechanically stable, has light collecting power substantially greater than HST for extended emissions, despite having a volume of several x 10-3 m3. This makes the SHS polarimeter ideal for spacecraft applications. We describe the SHS and polarmetric optical techniques and provide a discussion of its planned development for studies of interplanetary hydrogen.
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Walter M. Harris, Fred L. Roesler, Kenneth H. Nordsieck, Lotfi Ben-Jaffel, and Jason Corliss "Studies of H Ly-α emissions in the solar neighborhood with the techniques of polarimetry and spatial heterodyne spectroscopy (SHS)", Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, (24 February 2003); https://doi.org/10.1117/12.460029
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