acronyms; image area; references; Times Roman; Acronym; Cosmological modeling; Dark matter; Dwarf galaxies; Image area; Near infrared spectral; Reference; Stellars; Time roman; Visible and near infrared; Electronic, Optical and Magnetic Materials; Condensed Matter Physics; Computer Science Applications; Applied Mathematics; Electrical and Electronic Engineering
Abstract :
[en] ARRAKIHS is an ESA mission dedicated to observing dwarf galaxies and stellar streams. Its objective will be to test the standard cosmological model, particularly regarding the nature of dark matter. It will use four telescopes operating in the visible and near infrared spectral ranges. As they will observe ultra-low brightness objects, an extreme level of stray light control is necessary. A large external baffle is necessary to prevent out-of-field light from entering the telescope, with an extreme stray light rejection down to 10-11. This paper will discuss the design of this baffle. We will present the design trade-offs, as different possible baffle architectures were considered. Ultimately, the selected architecture consists in developing one baffle for two telescopes, hence a total of two baffles are used on the payload. A multi-stage baffle is developed, in the heritage of the CoRoT baffle which is seen as one of the best ever designed. Moreover, we will discuss the reflections on the test setup which will be implemented for validating the design on a prototype.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Clermont, Lionel ; Université de Liège - ULiège > Centres généraux > CSL (Centre Spatial de Liège)
Lallemand, Etienne ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Plesseria, Jean-Yves ; Université de Liège - ULiège > Centres généraux > CSL (Centre Spatial de Liège)
Serrano, S.
Kintziger, Christian ; Université de Liège - ULiège > Centres généraux > CSL (Centre Spatial de Liège)
Language :
English
Title :
The stray light baffle for the ARRAKIHS mission
Publication date :
2024
Event name :
Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave
Event place :
Yokohama, Jpn
Event date :
16-06-2024 => 22-06-2024
Audience :
International
Main work title :
Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave
Editor :
Coyle, Laura E.
Publisher :
International Society for Optical Engineering (SPIE)
ISBN/EAN :
978-1-5106-7507-0
Peer review/Selection committee :
Editorial reviewed
Funders :
JNTO - Japan National Tourism Organization NAOJ - National Astronomical Observatory of Japan NICT - National Institute of Information and Communications Technology SPIE - Society of Photo-Optical Instrumentation Engineers
Funding text :
The authors thank the Belgian Federal Science Policy Office (BELSPO) for the provision of financial support in the framework of the PRODEX Program of the European Space Agency (ESA) under contract number 4000143891; City of Yokohama
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