1 November 1990 Hard x-ray and gamma-ray imaging spectroscopy for the next solar maximum
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hugh S. Hudson, Carol Jo Crannell, Daniel S. Spicer, John M. Davis, Brian R. Dennis, Gordon J. Hurford, Robert P. Lin, "Hard x-ray and gamma-ray imaging spectroscopy for the next solar maximum", Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); doi: 10.1117/12.23274; https://doi.org/10.1117/12.23274
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