Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprk12001l&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
The Sun is the most powerful particle accelerator in the solar system, accelerating ions up to tens of GeV and electrons to hundreds of MeV. The primary scientific objective of High Energy Solar Spectroscopic Imager (HESSI) mission is to investigate the physics of particle acceleration and energy release in solar flares, where the accelerated 10-100 keV electrons (and possibly MeV ions) appear to contain > 10-50 utilizes rotating modulator collimators together with cooled germanium detectors to do imaging and spectroscopy of hard X-ray/gamma-ray continuum produced by energetic electrons and gamma-ray lines produced by energetic ions. It will cover the energy range from 3 keV to 17 MeV, and provide the first hard X-ray imaging spectroscopy ( 2 arcsec, 1 keV), the first high resolution ( 1-5 keV) spectroscopy of solar gamma-ray lines, and the first imaging ( 36 arcsec) of solar gamma-ray lines and continuum. I expect to discuss the preliminary results from HESSI, which is currently planned for launch Jan 24, 2002.
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