A diffraction limited dual-band x-ray telescope

Christoph Braig; Peter Predehl

doi:10.1117/12.734350

20 September 2007 A diffraction limited dual-band x-ray telescope

Christoph Braig, Peter Predehl

Proceedings Volume 6688, Optics for EUV, X-Ray, and Gamma-Ray Astronomy III; 668808 (2007) https://doi.org/10.1117/12.734350
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

We present an innovative X-ray telescope design for diffraction-limited imaging on the mas scale. The long focal distance scheme is based on dispersion-corrected Fresnel lenses made of Li and Be. Annular apertures with an outer diameter of 3.5 m permit simultaneously focused X-rays in two energy bands around 5 and 10 keV. Concentrated to focal spot sizes of ~ 1 mm, a photon throughput of ~ 1400 cm² keV is achieved in the soft and hard band as well. With its partial spectroscopic capability, the device might be preferably suited for measurements of hardness ratios in X-ray emitting coronae of nearby stars and even disc-to-jet conversion mechanisms within AGN.

Citation Download Citation

Christoph Braig and Peter Predehl "A diffraction limited dual-band x-ray telescope", Proc. SPIE 6688, Optics for EUV, X-Ray, and Gamma-Ray Astronomy III, 668808 (20 September 2007); https://doi.org/10.1117/12.734350

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