Environmental testing of an all-reflective spatial heterodyne
spectrometer for wide input angle measurements of H Ly-alpha at high
spectral resolving power

Walter Harris; Jason Corliss; Yan Bétrémieux; Fred Roesler

doi:10.1117/12.925725

17 September 2012 Environmental testing of an all-reflective spatial heterodyne spectrometer for wide input angle measurements of H Ly-alpha at high spectral resolving power

Walter Harris, Jason Corliss, Yan Bétrémieux, Fred Roesler

Author Affiliations +

Proceedings Volume 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray; 844330 (2012) https://doi.org/10.1117/12.925725
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

Scattered solar and collisionally stimulated H Ly-α emission is a proven diagnostic for the study of the Sun, comets, the interplanetary medium, planet atmospheres, and corona. Here we discuss the construction and testing of a narrow bandpass instrument designed to observe H Ly-α emission at a resolving power of R~100,000 from targets with an angular extent of ≤½ degree. The instrument is an all-reflective form of the spatial heterodyne spectrometer (SHS), a self-scanning Fourier Transform Spectrometer. It will be incorporated into the focal plane of a suborbital telescope that is scheduled for a March 2013 launch. Initial alignment and vibrational testing was performed with the instrument aligned to a visible analog line. The results showed alignment stability under vibration, but revealed several unacceptable resonances that have been corrected in the mechanical design.

Citation Download Citation

Walter Harris, Jason Corliss, Yan Bétrémieux, and Fred Roesler "Environmental testing of an all-reflective spatial heterodyne spectrometer for wide input angle measurements of H Ly-alpha at high spectral resolving power", Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844330 (17 September 2012); https://doi.org/10.1117/12.925725

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