Title: | OBJECTIVES
OF RESIK SOLAR CONCAVE SOFT X-RAY SPECTROMETER FOR CORONAS-F MISSION
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Authors: | J.Sylwester and R.D. Bentley | |
Abstract: |
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. In the paper 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 have been selected to perform
measurements of the solar active region and flare spectra: 2.97-3.24
Å, 3.15-3.25 Å, 4.95-5.15 Å, and 6.50-7.19 Å.
Special "Dopplerometer" arrangement of the crystals will
allow to assign "absolute" wavelength scale and determine
the role of directed and turbulent flows in the source. Interpretation
of the line and continuum intensities will permit to derive the
differential emission measure for plasma temperatures T > 3 MK, and
to determine the composition (relative to H) of the coronal plasma for
many elements including these with different first ionization
potential. |
FULL VERSION-HTML | ||||
Figures: | Fig1. |
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Fig2. |
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Fig3. |
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Table: | Table1 |
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Table2 |
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Web Curator: Janusz
Sylwester ( js@cbk.pan.wroc.pl)