Imaging the sun in hard x-rays: spatial and rotating modulation collimators

Jonathan W. Campbell; John M. Davis; A. Gordon Emslie

doi:10.1117/12.48336

1 October 1991 Imaging the sun in hard x-rays: spatial and rotating modulation collimators

Jonathan W. Campbell, John M. Davis, A. Gordon Emslie

Author Affiliations +

Proceedings Volume 1549, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II; (1991) https://doi.org/10.1117/12.48336
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Several approaches to imaging hard X-rays emitted from solar flares have been proposed or are planned for the nineties including the spatial modulation collimator (SMC) and the rotating modulation collimator (RMC). A survey of current solar flare theoretical literature indicates the desirability of spatial resolutions down to 1 arcsecond, field of views greater than the full solar disk (i.e., 32 arcminutes), and temporal resolutions down to 1 second. Although the sun typically provides relatively high flux levels, the requirement for 1 second temporal resolution raises the question as to the viability of Fourier telescopes subject to the aforementioned constraints. A basic photon counting, Monte Carlo 'end-to-end' model telescope was employed using the Astronomical Image Processing System (AIPS) for image reconstruction. The resulting solar flare hard X-ray images compared against typical observations indicated that both telescopes show promise for the future.

Citation Download Citation

Jonathan W. Campbell, John M. Davis, and A. Gordon Emslie "Imaging the sun in hard x-rays: spatial and rotating modulation collimators", Proc. SPIE 1549, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II, (1 October 1991); https://doi.org/10.1117/12.48336

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