EUV and soft x-ray telescope-spectrometer for imaging spectroscopy on the Solar Orbiter mission: configurations with multilayer-coated optics

Details EUV and soft x-ray telescope-spectrometer for imaging spectroscopy on the Solar Orbiter mission: configurations with multilayer-coated optics EUV and soft x-ray telescope-spectrometer for imaging spectroscopy on the Solar Orbiter mission: configurations with multilayer-coated optics

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001spie.4498...51p&link_type=abstract

Proc. SPIE Vol. 4498, p. 51-62, UV/EUV and Visible Space Instrumentation for Astronomy and Solar Physics, Oswald H. Siegmund; Si

Astronomy and Astrophysics

Astronomy

Scientific paper

Two configurations with multilayer-coated optics for an EUV and soft X-ray telescope-spectrometer for imaging spectroscopy on the Solar Orbiter mission are presented. The telescope is designed with conventional grazing-incidence optics, in order to reduce the thermal load on optics looking directly at the solar disk. The spectrometer mounts a normal-incidence multilayer-coated grating, being protected by the entrance slit. Two configurations are presented: a grazing-incidence telescope that feeds a normal-incidence grating spectrometer and two grazing-incidence telescopes with cylindrical mirrors in the Kirkpatrick-Baez configuration and a normal-incidence spectrometer with a cylindrical grating. In the former case, the off-axis resolution of the telescope is degraded by the grating aberrations. In the latter case, the spectral and spatial focusing properties are fully uncoupled: the off-axis resolution is independent from the grating performance. The performance in the 18-22 nm spectral region are compared with those of a grazing-incidence telescope-spectrometer.

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