Physics – Optics
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1160..611g&link_type=abstract
IN: X-ray/EUV optics for astronomy and microscopy; Proceedings of the Meeting, San Diego, CA, Aug. 7-11, 1989 (A90-46006 21-74).
Physics
Optics
Beryllium, Monte Carlo Method, Polarimeters, Solar Flares, X Ray Imagery, X Ray Scattering, Engineering Drawings, High Altitude Balloons, Polarization (Waves), Sodium Iodides, Systems Engineering
Scientific paper
A model of a solar flare X-ray polarimeter utilizing a large-area thin beryllium scattering disk was developed using Monte Carlo techniques for several classes of solar flares. The solar-flare polarimeter consists of a 30-cm-diam Be disk of about 1/3 of a scattering length thickness, which is surrounded by a cylindrical detector composed of six segmented panels of NaI scintillators, each coupled to 15 photomultiplier tubes. The instrument is sensitive to X-rays from 10 to 100 keV. For a class-M-2 solar flare observed for 10 sec from a balloon at an altitude of 150,000 ft, the minimum detectable polarization at the 99 percent statistical confidence level was found to be 1-6 percent over the energy range 20-100 keV.
Chanan Greg
Emslie A.
Gotthelf Eric
Hamilton Thomas T.
Novick Robert
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