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Proceedings Paper

Large thin adaptive x-ray mirrors
Author(s): Peter Doel; Carolyn Atkins; Samantha J. Thompson; David Brooks; Jun Yao; Charlotte Feldman; Richard Willingale; Tim Button; Dou Zhang; Ady James
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Paper Abstract

This paper describes the progress made in a proof of concept study and recent results of a research program into large active x-ray mirrors that is part of the UK Smart X-ray Optics project. The ultimate aim is to apply the techniques of active/adaptive optics to the next generation of nested shell astronomical X-ray space telescopes. A variety of deformable mirror technologies are currently available, the most promising of which for active X-ray mirrors are probably unimorph and bimorph piezoelectric mirrors. In this type of mirror one or more sheets of piezoelectric material are bonded to or coated with a passive reflective layer. On the back or between the piezoceramic layer/layers are series of electrodes. Application of an electric field causes the piezoelectric material to undergo local deformation thus changing the mirror shape. Starting in 2005 a proof of concept active mirror research program has been undertaken. This work included modelling and development of actively controlled thin shell mirrors. Finite element models of piezo-electric actuated mirrors have been developed and verified against experimental test systems. This has included the modelling and test of piezo-electric hexagonal unimorph segments. Various actuator types and low shrinkage conductive bonding methods have been investigated and laboratory tests of the use of piezo-electric actuators to adjust the form of an XMM-Newton space telescope engineering model mirror shell have been conducted and show that movement of the optics at the required level is achievable. Promising technological approaches have been identified including moulded piezo-ceramics and piezo-electrics fibre bundles.

Paper Details

Date Published: 20 September 2007
PDF: 8 pages
Proc. SPIE 6705, Advances in X-Ray/EUV Optics and Components II, 67050M (20 September 2007); doi: 10.1117/12.734608
Show Author Affiliations
Peter Doel, Univ. College London (United Kingdom)
Carolyn Atkins, Univ. College London (United Kingdom)
Samantha J. Thompson, Univ. College London (United Kingdom)
David Brooks, Univ. College London (United Kingdom)
Jun Yao, Institute of Optics and Electronics (China)
Charlotte Feldman, Univ. of Leicester (United Kingdom)
Richard Willingale, Univ. of Leicester (United Kingdom)
Tim Button, Univ. of Birmingham (United Kingdom)
Dou Zhang, Univ. of Birmingham (United Kingdom)
Ady James, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 6705:
Advances in X-Ray/EUV Optics and Components II
Ali M. Khounsary; Christian Morawe; Shunji Goto, Editor(s)

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