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Proceedings Paper

Performance prediction and measurement of silicon pore optics
Author(s): Marcelo D. Ackermann; Maximilien J. Collon; Ramses Guenther; Rakesh Partapsing; Giuseppe Vacanti; Ernst-Jan Buis; Michael Krumrey; Peter Müller; Marco W. Beijersbergen; Marcos Bavdaz; Kotska Wallace
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Paper Abstract

We present the latest results of X-ray metrology performed on Silicon Pore Optics, a novel type of lightweight X-ray optics made from silicon and developed for future, large area space based X-ray telescopes. From these so-called pencil beam measurements, performed at the PTB laboratory of the BESSY synchrotron radiation facility, the overall performance in terms of half energy width (HEW) of the optics has been calculated. All measurements are performed at an intrafocal distance, but due to the nature of this measurement method, the results in terms of HEW can be extrapolated to the focal plane. In the near future, upgrades of the X-ray facilities will allow measuring the performance of the optics in the actual focal plane. We also present the newest development of our X-ray tracer tool, which is used to retrieve performance and imaging prediction from single plate level up to a full optic by use of the mirror figure, as recorded during the fabrication process. We furthermore present results of AFM imaging and X-ray reflectivity measurements performed to determine the surface roughness of the base material (polished Si wafers) and of fully processed and coated mirror plates.

Paper Details

Date Published: 31 August 2009
PDF: 10 pages
Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 74371N (31 August 2009); doi: 10.1117/12.826840
Show Author Affiliations
Marcelo D. Ackermann, cosine Research B.V. (Netherlands)
Maximilien J. Collon, cosine Research B.V. (Netherlands)
Ramses Guenther, cosine Research B.V. (Netherlands)
Rakesh Partapsing, cosine Research B.V. (Netherlands)
Giuseppe Vacanti, cosine Research B.V. (Netherlands)
Ernst-Jan Buis, cosine Science & Computing B.V. (Netherlands)
Michael Krumrey, Physikalisch-Technische Bundesanstalt (Germany)
Peter Müller, Physikalisch-Technische Bundesanstalt (Germany)
Marco W. Beijersbergen, cosine Research B.V. (Netherlands)
Marcos Bavdaz, European Space Agency (Netherlands)
Kotska Wallace, European Space Agency (Netherlands)

Published in SPIE Proceedings Vol. 7437:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

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