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  Concept study of Solar-C_EUVST optical design

Kawate, T., Shimizu, T., Imada, S., Tsuzuki, T., Katsukawa, Y., Hara, H., et al. (2019). Concept study of Solar-C_EUVST optical design. Proceedings of SPIE, 11118: 111181N. doi:10.1117/12.2527957.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-DB33-B Version Permalink: http://hdl.handle.net/21.11116/0000-0005-DB34-A
Genre: Conference Paper

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 Creators:
Kawate, Tomoko, Author
Shimizu, Toshifumi, Author
Imada, Shinsuke, Author
Tsuzuki, Toshihiro, Author
Katsukawa, Yukio, Author
Hara, Hirohisa, Author
Suematsu, Yoshinori, Author
Ichimoto, Kiyoshi, Author
Warren, Harry, Author
Teriaca, Luca1, Author              
Korendyke, Clarence M., Author
Brown, Charles, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: The main characteristics of Solar-C_EUVST are the high temporal and high spatial resolutions over a wide temperature coverage. In order to realize the instrument for meeting these scientific requirements under size constraints given by the JAXA Epsilon vehicle, we examined four-dimensional optical parameter space of possible solutions of geometrical optical parameters such as mirror diameter, focal length, grating magnification, and so on. As a result, we have identified the solution space that meets the EUVST science objectives and rocket envelope requirements. A single solution was selected and used to define the initial optical parameters for the concept study of the baseline architecture for defining the mission concept. For this solution, we optimized the grating and geometrical parameters by ray tracing of the Zemax software. Consequently, we found an optics system that fulfills the requirement for a 0.4” angular resolution over a field of view of 100" (including margins) covering spectral ranges of 170-215, 463-542, 557-637, 690-850, 925-1085, and 1115-1275 A. This design achieves an effective area 10 times larger than the Extreme-ultraviolet Imaging Spectrometer onboard the Hinode satellite, and will provide seamless observations of 4.2-7.2 log(K) plasmas for the first time. Tolerance analyses were performed based on the optical design, and the moving range and step resolution of focus mechanisms were identified. In the presentation, we describe the derivation of the solution space, optimization of the optical parameters, and show the results of ray tracing and tolerance analyses.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1117/12.2527957
 Degree: -

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Title: Proceedings of SPIE
Source Genre: Journal
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Publ. Info: Bellingham, Washington : SPIE
Pages: - Volume / Issue: 11118 Sequence Number: 111181N Start / End Page: - Identifier: ISSN: 0277-786X
CoNE: https://pure.mpg.de/cone/journals/resource/0277-786X