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Proceedings Paper

Environmental testing of an all-reflective spatial heterodyne spectrometer for wide input angle measurements of H Ly-alpha at high spectral resolving power
Author(s): Walter Harris; Jason Corliss; Yan Bétrémieux; Fred Roesler
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Paper 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.

Paper Details

Date Published: 17 September 2012
PDF: 8 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844330 (17 September 2012); doi: 10.1117/12.925725
Show Author Affiliations
Walter Harris, Univ. of California, Davis (United States)
Jason Corliss, Univ. of California, Davis (United States)
Yan Bétrémieux, Max-Planck-Institut für Astronomie (Germany)
Fred Roesler, Univ. of Wisconsin-Madison (United States)

Published in SPIE Proceedings Vol. 8443:
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Stephen S. Murray; Jan-Willem A. den Herder, Editor(s)

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