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Proceedings Paper

Aberrations in square pore micro-channel optics used for x-ray lobster eye telescopes
Author(s): R. Willingale; J. F. Pearson; A. Martindale; C. H. Feldman; R. Fairbend; E. Schyns; S. Petit; J. P. Osborne; P. T. O'Brien
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Paper Abstract

We identify all the significant aberrations that limit the performance of square pore micro-channel plate optics (MPOs) used as an X-ray lobster eye. These include aberrations intrinsic to the geometry, intrinsic errors associated with the slumping process used to introduce a spherical form to the plates and imperfections associated with the plate manufacturing process. The aberrations are incorporated into a comprehensive software model of the X-ray response of the optics and the predicted imaging response is compared with the measured X-ray performance obtained from a breadboard lobster eye. The results reveal the manufacturing tolerances which limit the current performance of MPOs and enable us to identify particular intrinsic aberrations which will limit the ultimate performance we can expect from MPO-lobster eye telescopes.

Paper Details

Date Published: 18 July 2016
PDF: 9 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99051Y (18 July 2016); doi: 10.1117/12.2232946
Show Author Affiliations
R. Willingale, Univ. of Leicester (United Kingdom)
J. F. Pearson, Univ. of Leicester (United Kingdom)
A. Martindale, Univ. of Leicester (United Kingdom)
C. H. Feldman, Univ. of Leicester (United Kingdom)
R. Fairbend, PHOTONIS France S.A.S. (France)
E. Schyns, PHOTONIS France S.A.S. (France)
S. Petit, PHOTONIS France S.A.S. (France)
J. P. Osborne, Univ. of Leicester (United Kingdom)
P. T. O'Brien, Univ. of Leicester (United Kingdom)

Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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