000003515 001__ 3515
000003515 005__ 20180302140524.0
000003515 0247_ $$2DOI$$a10.1117/12.2309019
000003515 037__ $$aSCART-2018-0041
000003515 100__ $$aHalain, J.P.
000003515 245__ $$aEUV high resolution imager on-board solar orbiter: optical design and detector performances
000003515 260__ $$c2017
000003515 520__ $$aThe EUV high resolution imager (HRI) channel of the Extreme Ultraviolet Imager (EUI) on-board Solar Orbiter will observe the solar atmospheric layers at 17.4 nm wavelength with a 200 km resolution. The HRI channel is based on a compact two mirrors off-axis design. The spectral selection is obtained by a multilayer coating deposited on the mirrors and by redundant Aluminum filters rejecting the visible and infrared light. The detector is a 2k x 2k array back-thinned silicon CMOS-APS with 10 μm pixel pitch, sensitive in the EUV wavelength range. Due to the instrument compactness and the constraints on the optical design, the channel performance is very sensitive to the manufacturing, alignments and settling errors. A trade-off between two optical layouts was therefore performed to select the final optical design and to improve the mirror mounts. The effect of diffraction by the filter mesh support and by the mirror diffusion has been included in the overall error budget. Manufacturing of mirror and mounts has started and will result in thermo-mechanical validation on the EUI instrument structural and thermal model (STM). Because of the limited channel entrance aperture and consequently the low input flux, the channel performance also relies on the detector EUV sensitivity, readout noise and dynamic range. Based on the characterization of a CMOS-APS back-side detector prototype, showing promising results, the EUI detector has been specified and is under development. These detectors will undergo a qualification program before being tested and integrated on the EUI instrument.
000003515 594__ $$aSTCE
000003515 6531_ $$aEUI
000003515 6531_ $$aSolar Orbiter
000003515 6531_ $$aInstrumentation
000003515 700__ $$aMazzoli, A.
000003515 700__ $$aRochus, P.
000003515 700__ $$aRenotte, E.
000003515 700__ $$aStockmans, Y.
000003515 700__ $$aBerghmans, D.
000003515 700__ $$aBenMoussa, A.
000003515 700__ $$aAuchère, F.
000003515 773__ $$nid. 105643V 6$$pProceedings of the SPIE$$v10564$$y2017
000003515 8560_ $$fdavid.berghmans@observatoire.be
000003515 85642 $$ahttp://adsabs.harvard.edu/abs/2017SPIE10564E..3VH
000003515 85642 $$ahttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/10564/2309019/EUV-high-resolution-imager-on-board-solar-orbiter--optical/10.1117/12.2309019.full
000003515 8564_ $$s1340755$$uhttps://publi2-as.oma.be/record/3515/files/105643V.pdf
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000003515 905__ $$apublished in
000003515 980__ $$aNONREF