Future high-resolution x-ray telescope technologies: prototype fabrication methods and finite element analysis

The Smart X-ray Optics (SXO) project is a UK based consortium consisting of several institutions investigating the application of active/adaptive optics to both large and small scale grazing incidence x-ray optics. University College London presents work relating to the large scale x-ray optics that is geared towards the next generation of x-ray space telescopes. It is proposed that through the addition of piezoelectric actuators, an active x-ray telescope with a resolution better than that currently achieved (e.g. Chandra 0.5") could be realised. An immediate aim of the SXO project is to produce an operational active ellipsoidal segment prototype, with point-to- point focusing and with the intention of being tested at the University of Leicester's x-ray beam source. Work relating to the fabrication of the prototype will be presented, including shell replication via a nickel sulphamate electroforming process, piezoelectric actuators and prototype assembly and operation. Results from finite element analysis modelling will be discussed; these relate primarily to gravitational distortion effects and the plating tank electrostatics.

[1]  Jun Yao,et al.  Large thin adaptive x-ray mirrors , 2007, SPIE Optical Engineering + Applications.

[2]  D. Spiga,et al.  Development of grazing-incidence multilayer mirrors by direct Ni electroforming replication: a status report , 2005, SPIE Optics + Photonics.

[3]  P. Gondoin,et al.  XMM-Newton observatory. I. The spacecraft and operations , 2001 .

[4]  Martin C. Weisskopf,et al.  The Chandra X-Ray Observatory Overview , 2000 .

[5]  G. Fabbiano,et al.  Active x-ray optics for Generation-X: the next high resolution x-ray observatory , 2006, SPIE Astronomical Telescopes + Instrumentation.

[6]  Enectali Figueroa-Feliciano,et al.  Generation-X: An X-ray observatory designed to observe first light objects , 2006 .

[7]  David J. Brooks,et al.  Active x-ray mirror development at UCL: preliminary results , 2007, International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT).

[8]  Hsiharng Yang,et al.  Improvement of thickness uniformity in nickel electroforming for the LIGA process , 2000 .

[9]  Darell Engelhaupt,et al.  Metrology for the development of high-energy x-ray optics , 2005, SPIE Optics + Photonics.

[10]  Kim Yong Lim,et al.  Understanding and improving the uniformity of electrodeposition , 2003 .

[11]  Bo Su,et al.  Routes to net shape electroceramic devices and thick films , 2001 .

[12]  Christopher R. Bowen,et al.  Manufacture and characterization of high activity piezoelectric fibres , 2006 .

[13]  D. Brooks,et al.  A nickel-carbon-fibre composite for large adaptive mirrors: fabrication methods and properties. , 2008, Optics express.

[14]  Richard Willingale,et al.  Active microstructured arrays for x-ray optics , 2007, SPIE Optical Engineering + Applications.