The High Energy Solar Spectroscopic Imager (HESSI): A Small Explorer for the Start of the New Millennium

Details The High Energy Solar Spectroscopic Imager (HESSI): A Small Explorer for the Start of the New Millennium The High Energy Solar Spectroscopic Imager (HESSI): A Small Explorer for the Start of the New Millennium

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.7416h&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #74.16; Bulletin of the American Astronomical Society, Vol. 29, p.1326

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The High Energy Solar Spectroscopic Imager (HESSI) has been selected for launch in mid 2000, at the peak of the solar activity cycle. The primary scientific objective of HESSI is to understand particle acceleration and explosive energy release in the magnetized plasma at the Sun. HESSI will provide the first high-spectral-resolution x-ray and gamma -ray images of the Sun. It will obtain the first imaging above 100 keV, the first imaging of solar gamma -ray lines, and the first high-resolution spectroscopy of solar gamma -ray lines, including the first determination of line shapes. In two years HESSI is expected to obtain observations of tens of thousands of microflares, thousands of hard x-ray flares, and of order a hundred gamma -ray line flares. HESSI will also monitor and provide high-spectral-resolution observations of cosmic and terrestrial hard x-ray and gamma -ray transients, as well as imaging of the Crab Nebula. HESSI's high spectral, spatial, and temporal resolution and dynamic range will allow the first detailed studies of the evolution of both accelerated particles and hot, thermal plasma in solar flares.

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