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- W2055018502 abstract "A high-efficiency, extreme ultraviolet (EUV) imaging spectrometer has been constructed and tested. The spectrometer employs a concave toroidal grating illuminated at normal incidence in a Rowland circle mounting and has only one reflecting surface. The toroidal grating has been fabricated by a new technique employing an elastically deformable submaster grating which is replicated in a spherical form and then mechanically distorted to produce the desired aspect ratio of the toroidal surface for stigmatic imaging over the selected wavelength range. The fixed toroidal grating used in the spectrometer is then replicated from this surface. Photographic tests and initial photo-electric tests with a two-dimensional, pulse-counting detector system have verified the image quality of the toroidal grating at wavelengths near 600 Å. The basic designs of two instruments employing the spectrometer for astrophysical investigations in space are described, namely, a high-resolution EUV spectroheliometer for studies of the solar chromo-phere, transition region, and corona; and an EUV spectroscopic telescope for studies of non-solar objects." @default.
- W2055018502 created "2016-06-24" @default.
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- W2055018502 date "1986-10-13" @default.
- W2055018502 modified "2023-09-23" @default.
- W2055018502 title "An Imaging Extreme Ultraviolet Spectrometer For Astrophysical Investigations In Space" @default.
- W2055018502 doi "https://doi.org/10.1117/12.968110" @default.
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