The Hard X-ray Telescope (HXT) for the SOLAR-A Mission

Details The Hard X-ray Telescope (HXT) for the SOLAR-A Mission The Hard X-ray Telescope (HXT) for the SOLAR-A Mission

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..136...17k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 136, Nov. 1991, p. 17-36.

Physics

295

Japanese Space Program, Maximum Entropy Method, Solar Flares, Space Missions, X Ray Imagery, X Ray Telescopes, Fourier Transformation, Solar Maximum Mission, Spaceborne Telescopes

Scientific paper

This study presents HXT, a Fourier-synthesis imager which takes images of solar flares simultaneously in four energy bands, with an ultimate angular resolution as fine as about 5 arcsec and a time resolution of 0.5 s. Each subcollimator has a field of view wider than the solar disk. The total effective area of the collimator/detector system reaches about 70 sq cm, about one order of magnitude larger than that of the Hinotori hard X-ray imager. These improvements enable HXT to take images of flares at photon energies above 30 keV. These higher-energy images are to be compared with lower-energy ones, giving clues to the understanding of nonthermal processes in solar flares, i.e., the acceleration and confinement of energetic electrons. It is of particular importance to specify the acceleration site with regard to the magnetic field figuration in a flaring region, which is to be achieved by collaborative observations between HXT and the soft X-ray telescope on board the same mission.

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