Objectives of RESIK solar concave soft X ray spectrometer for Coronas-F mission

Details Objectives of RESIK solar concave soft X ray spectrometer for Coronas-F mission Objectives of RESIK solar concave soft X ray spectrometer for Coronas-F mission

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.348..357s&link_type=abstract

In ESA, Proceedings of the First SOHO Workshop: Coronal Streamers, Coronal Loops, and Coronal and Solar Wind Composition p 357-3

Computer Science

Satellite-Borne Instruments, Solar Corona, Solar Spectrometers, Space Missions, X Ray Spectroscopy, Bragg Angle, Crystals, Diffraction, Solar Flares, Solar Spectra, Soviet Satellites

Scientific paper

Several institutes are involved in construction of the high sensitivity soft X-ray spectrometer RESIK, to be flown aboard the Russian Coronas-F satellite in 1994/95. The scientific objectives of the instrument are discussed, arising as a compromise between the scientific interests and constrained by good quality large area crystals obtainable, detector dimensions and the geometry of Bragg concave crystal reflection. Four bands were selected to perform measurements of the solar active region and flare spectra: 2.97 to 3.24 A, 3.15 to 3.25 A, 4.95 to 5.15 A, and 6.50 to 7.19 A. Special 'Dopplerometer' arrangement of the crystals will allow the assignment of 'absolute' wavelength scale and will determine the role of directed and turbulent flows in the source. Interpretation of the line and continuum intensities will derive the differential emission measure for plasma temperature T greater than 3 MK, and will detemine the composition (relative to H) of the coronal plasma for many elements including these with different first ionization potential.

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