A Fourier transform telescope for sub-arcsecond imaging of X-rays and gamma raysThis paper describes a Fourier transform telescope designed to image solar flare X-rays and gamma rays at energies up to 1 MeV with arcsec resolution. The imaging technique makes use of a bigrid collimator divided into a number of smaller areas called subcollimators. The grids in each subcollimator consist of a set of linear apertures so configured that each subcollimator provides a measurement of a single Fourier component of the angular distribution of the source. The imaging concept is therefore a mathematical analog to aperture synthesis in radio astronomy. For X-ray and gamma-ray astronomy, this approach has significant advantages in terms of relaxed requirements for astronomy, this approach has significant advantages in terms of relaxed requirements for position sensitivity in the detector and for control of grid alignment in the large scale telescope structure. The concept of the Fourier transform telescope will be illustrated with numerical parameters of a version now under study for the Pinhole/Occulter Facility.
Document ID
19870023738
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Crannell, C. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Orwig, L. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hurford, G. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Prince, T. A. (California Institute of Technology Pasadena, United States)