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DIOGENESS and RESIK Database This page provides access to high resolution spectra
obtained from Diogeness and RESIK X-ray
spectrometers flown on CORONAS-F satellite |
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Diogeness Diogeness
was a flat crystal scanning spectrometer and photometer. The scanning range of
the spectrometer
covered 140 arcmin. The instrument had four
measurement channels.
Details concerning the crystal
used and wavelength ranges
covered are given in Table 1. Table 1: Diogeness crystals characteristics
During
intense flare spectra were sampled about twice faster than normally
(0.4 s). Two identical
quartz crystals were mounted
in the so-called dopplerometer configuration. Such arrangement of
the crystals allowed
to precisely measure expected
flare related Doppler
shifts of X-ray lines. For the source plasma being at rest,
the maxima of
lines scanned in opposite directions would be measured nearly simultaneously. If any
radial motions were
present, the lines were off-set
in time. The relative off-set can be directly translated
to the solar plasma velocities. |
Diogeness spectrometer as seen
from the crystal assembly side. |
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RESIK RESIK was a bent crystal spectrometer designed to observe solar
spectra in wavelength range below
6 Å. RESIK was aimed at measuring
line
and continuum fluxes for many lines belonging to
ions with atomic numbers between 14 and 30. Thin large area crystals wafers (0.5 mm and 1 mm) of silicon and quartz monocrystals were used as dispersive elements (Table 2). Table 2: RESIK crystal characteristics
The wavelength channels
of RESIK spread over ten different
spectral bands (including higher order reflections). The crystals were bent to a convex cylindrical
profiles since this geometry allows to reduce the overall size of the
crystal-detector assembly. There
are no moving
parts (except for the stepper motors used
for calibration purposes
(Fe55) and no collimator was used, so the X-ray radiation of the entire solar corona contributed to the spectra. Acknowledgement. The
research leading to these results has received funding from the European
Commission's Seventh Framework Programme
(FP7/2007-2013) under the grant agreement eHeroes
(project n° 284461, www.eheroes.eu). |
RESIK spectrometer as seen from
the crystal assembly side. |
