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Proceedings Paper

Hard x-ray and gamma-ray imaging spectroscopy for the next solar maximum
Author(s): Hugh S. Hudson; Carol Jo Crannell; Daniel S. Spicer; John M. Davis; Brian R. Dennis; Gordon J. Hurford; Robert P. Lin
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Paper Abstract

A single high-energy instrument based on rotating modulation collimators with germanium semiconductor spectrometers as the detectors can provide high angular resolution (< 1 arc sec), high time resolution (< 1 s), and high spectral resolution (about one keV), all in one package. Such rotating modulation- collimator optics provide excellent spatial (u,v)-plane coverage for high-contrast images in the hard X-ray domain, where there will be a large signal-to-noise ratio during even modest flares. The use of thick modulation plates will make it possible to image gamma rays with < 5 arc sec angular resolution to energies in excess of 10 MeV during the more energetic flares without compromising the ability of the germanium detectors to resolve the gamma-ray lines. Energetic neutrons will also be imaged for the first time with < 20 arc sec angular resolution. This combination of imaging and spectroscopy at high resolution will be a powerful tool for helping to answer central questions of solar flare physics, especially if such an instrument were supported by observations at longer wavelengths. The timing of solar activity dictates a launch of such a High-Energy Solar Physics (HESP) mission by 1998.

Paper Details

Date Published: 1 November 1990
PDF: 12 pages
Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); doi: 10.1117/12.23274
Show Author Affiliations
Hugh S. Hudson, Univ. of California/San Diego (United States)
Carol Jo Crannell, NASA/Goddard Space Flight Ctr. (United States)
Daniel S. Spicer, NASA/Goddard Space Flight Ctr. (United States)
John M. Davis, NASA/Marshall Space Flight Ctr. (United States)
Brian R. Dennis, NASA/Marshall Space Flight Ctr. (United States)
Gordon J. Hurford, California Institute of Technology (United States)
Robert P. Lin, Univ. of California/Berkeley (United States)


Published in SPIE Proceedings Vol. 1344:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy
Oswald H. W. Siegmund; Hugh S. Hudson, Editor(s)

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