11 July 1997 Development of multilayer mirrors for the XUV Doppler telescope
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Abstract
We present the development status of the normal incidence XUV multilayer mirrors for XUV Doppler telescope, which observes coronal velocity fields of the whole sun. The telescope has two narrow band-pass multilayer mirrors tuned to slightly longer and shorter wavelengths around the Fe XIV line at 211.3 Angstrom. From the intensity difference of the images taken with these two bands, we can obtain Dopplergram of 1.8 MK plasma of the whole sun. It is required that the multilayer has high wavelength-resolution ((lambda) /(Delta) (lambda) approximately 30 per mirror), anti-reflection coating for intense He II 304 angstrom emission line and high d-spacing uniformity of approximately 1%.
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Shin'ichi Nagata, Hirohisa Hara, Taro Sakao, Toshifumi Shimizu, Saku Tsuneta, Tsuyoshi Yoshida, Wakana Ishiyama, Katsuhiko Murakami, Tetsuya Oshino, "Development of multilayer mirrors for the XUV Doppler telescope", Proc. SPIE 3113, Grazing Incidence and Multilayer X-Ray Optical Systems, (11 July 1997); doi: 10.1117/12.278847; https://doi.org/10.1117/12.278847
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