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- The objective of the Hard X-ray Imaging Spectrometer (HXRIS) experiment was to
measure the position, structure, and thermodynamic properties of hot thermal
and nonthermal sources in active regions and in flares.
This instrument produced two-dimensional images with 8-arc-sec resolution over
an approximately square area of side 2 min 40 sec, or 32-arc-sec resolution
over a square of side 6 min 24 sec. These images were observed in six
selectable energy channels, between 3.5 and 30 keV, with a temporal resolution
of 0.5 to 7 sec, depending on the mode of operation. By means of a flare flag,
the experiment alerted other SMM instruments when a flare began and indicated
the position of the brightest pixel of the observation.
The instrument consisted of 10 etched grid plates, each divided into 576
sections that formed the collimator, and 900 miniproportional counters that
provided a position-sensitive detector system capable of spectral analysis.
A dual microcomputer system permitted three modes of operation with commandable
parameters that provided for a flexible tradeoff between temporal resolution
and spatial coverage during different phases of a solar flare.
For more details on this experiment, see H. R. Van Beek et al., Solar Phys., v.
65, p. 39, 1980.
FOV 6.4 arcmin, 8 or 32 arcsec spatial resolution, 3.5-30 keV,
PERSONNEL
PI - C. DE JAGER SPACE RESEARCH LAB, U OF UTRECHT
OI - H.F. VAN BEEK SPACE RESEARCH LAB, U OF UTRECHT
OI - A.P. WILLMORE U OF BIRMINGHAM
Additional information available at
"http://samadhi.jpl.nasa.gov/msl/QuickLooks/smmQL.html"
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