Diagram of HESSI

Diagram of the High Energy Solar Spectroscopic Imager

Hard x-ray and gamma-ray imaging are obtained with 9 rotating pairs of grids.  The rotation allows the flare emission to be observed at many different angles and, therefore, allows better images to be constructed.  High-resolution spectroscopy is obtained from 3 keV to 20 MeV using cooled germanium detectors.

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