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The Reuven Ramaty High Energy Solar Spectroscopic Imager (Rhessi) - Mission Description and Early Results

The Reuven Ramaty High Energy Solar Spectroscopic Imager (Rhessi) - Mission Description and Early Results

Paperback

Astronomy & SpaceGeologyPhysics

ISBN10: 9048162122
ISBN13: 9789048162123
Publisher: Springer Nature
Published: Dec 1 2010
Pages: 456
Weight: 1.43
Height: 0.94 Width: 6.14 Depth: 9.21
Language: English
The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) satellite was launched on 5 February 2002. Its objective is to study the energy release and particle acceleration in solar flares through observations of X-rays and gamma rays. Two novel technologies are combined to obtain both spectra and images over a broad energy range. For the spectroscopy, cooled hyperpure germanium detectors are used to cover the energy range from 3 keV to 17 MeV with unprecedented keV-class resolution. Since focusing optics are not possible for making images with such high energy photons, tungsten and molybdenum absorbing grids are used to modulate the X-rays and gamma-rays coming from the Sun as the spacecraft rotates. This allows the spatial Fourier components of the source to be determined so that images can be made in spectral ranges where astronomical images have never been produced before. These new instrumental techniques require equally innovative software to reconstruct X-ray and gamma-ray spectra and images from the observations.

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