RHESSI Innovation Technology and Resulting Scientific Advances

Details RHESSI Innovation Technology and Resulting Scientific Advances RHESSI Innovation Technology and Resulting Scientific Advances

Publishing date

Dec 2006

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm12a..01l&link_type=abstract

Journals

American Geophysical Union, Fall Meeting 2006, abstract #SM12A-01

Science

Physics

Additional info 3

2774 Radiation Belts, 3324 Lightning, 7519 Flares, 7554 X-Rays, Gamma Rays, And Neutrinos, 7594 Instruments And Techniques

Type

Scientific paper

Abstract

The RHESSI (Ramaty High Energy Solar Spectroscopic Imager) Small Explorer mission that provided ground- breaking imaging spectroscopy of hard X-ray and gamma-ray continuum and lines in solar flares, is based on a variety of innovative detector and imager technology developed primarily in NASA's high altitude balloon program. These include segmented, hyperpure germanium detectors cooled to liquid nitrogen temperatures with a low cost Stirling cycle mechanical cooler, rotating modulation collimators with high aspect ratio (50 to 1) fine grids for imaging complex diffuse sources, a precise solar aspect system, state-of-the-art pulse reset electronics, storage of every photon interaction with timing to a microsecond and energy to one third keV, etc. I discuss these innovations, their development, and the resulting new observations - including both solar flare observations and serendipitous new measurements of terrestrial gamma-ray flashes, solar oblateness, and extremely energtic radiation belt electrons.

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