Preprint
Optical alignment of contamination-sensitive Far-Ultraviolet spectrographs for Aspera SmallSat mission
arXiv.org
07/22/2024
DOI: 10.48550/arxiv.2407.15391
Abstract
Aspera is a NASA Astrophysics Pioneers SmallSat mission designed to study diffuse OVI emission from the warm-hot phase gas in the halos of nearby galaxies. Its payload consists of two identical Rowland Circle-type long-slit spectrographs, sharing a single MicroChannel plate detector. Each spectrograph channel consists of an off-axis parabola primary mirror and a toroidal diffraction grating optimized for the 1013-1057 Angstroms bandpass. Despite the simple configuration, the optical alignment/integration process for Aspera is challenging due to tight optical alignment tolerances, driven by the compact form factor, and the contamination sensitivity of the Far-Ultraviolet optics and detectors. In this paper, we discuss implementing a novel multi-phase approach to meet these requirements using state-of-the-art optical metrology tools. For coarsely positioning the optics we use a blue-laser 3D scanner while the fine alignment is done with a Zygo interferometer and a custom computer-generated hologram. The detector focus requires iterative in-vacuum alignment using a Vacuum UV collimator. The alignment is done in a controlled cleanroom facility at the University of Arizona.
Details
- Title: Subtitle
- Optical alignment of contamination-sensitive Far-Ultraviolet spectrographs for Aspera SmallSat mission
- Creators
- Aafaque R Khan - University of ArizonaErika Hamden - University of ArizonaHaeun Chung - University of ArizonaHeejoo Choi - University of ArizonaDaewook Kim - University of ArizonaNicole Melso - University of ArizonaKeri Hoadley - University of IowaCarlos J Vargas - University of ArizonaDaniel Truong - University of ArizonaElijah Garcia - University of ArizonaBill Verts - University of ArizonaFernando Coronado - University of ArizonaJamison Noenickx - University of ArizonaJason Corliss - University of ArizonaHannah Tanquary - University of ArizonaTom Mcmahon - University of ArizonaDave Hamara - University of ArizonaSimran Agarwal - University of ArizonaRamona Augustin - Space Telescope Science InstitutePeter Behroozi - University of ArizonaHarrison Bradley - University of ArizonaTrenton Brendel - University of ArizonaJoe Burchett - New Mexico State UniversityJasmine Martinez Castillo - University of ArizonaJacob Chambers - University of ArizonaLauren Corlies - Adler PlanetariumGreyson Davis - University of IowaRalf-Jürgen Dettmar - Ruhr University BochumEwan Douglas - University of ArizonaGiulia Ghidoli - Ascending Node Technologies, LLC, Tucson, Arizona, USAAlfred Goodwin - University of ArizonaWalter Harris - University of ArizonaCarl Hergenrother - Ascending Node Technologies, LLC, Tucson, Arizona, USAJ. Christopher Howk - University of Notre DameMiriam Keppler - University of ArizonaNazende Ipek Kerkeser - University of ArizonaJohn N Kidd Jr - Ascending Node Technologies, LLC, Tucson, Arizona, USAJessica S Li - University of ArizonaGabe Noriega - University of ArizonaSooseong Park - University of ArizonaRyan Pecha - University of ArizonaCork Sauve - University of ArizonaDavid Schiminovich - Columbia UniversitySanford Selznick - Ascending Node Technologies, LLC, Tucson, Arizona, USAOswald Siegmund - Sensor Sciences, LLC, Pleasant Hill, California, USARebecca Su - University of ArizonaSumedha Uppnor - University of ArizonaJacob Vider - University of ArizonaEllie Wolcott - University of ArizonaNaomi Yescas - University of ArizonaDennis Zaritsky - University of Arizona
- Resource Type
- Preprint
- Publication Details
- arXiv.org
- DOI
- 10.48550/arxiv.2407.15391
- eISSN
- 2331-8422
- Language
- English
- Date posted
- 07/22/2024
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984688446502771
Metrics
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