Finite element analysis of adaptive atom-optical mirrors

We present finite element analysis of the deflections of clamped, ultrathin single crystals under electrostatic pressure. The crystals form concave mirrors that are suitable for low-aberration reflective focusing of inert atom beams, such as those required for the construction of a scanning helium m...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2011-05, Vol.44 (18), p.185501
Main Authors: Ross, A E, MacLaren, D A, Allison, W
Format: Article
Language:English
Subjects:
Aberrations
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Geometrical optics
Optics
Physics
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Summary:We present finite element analysis of the deflections of clamped, ultrathin single crystals under electrostatic pressure. The crystals form concave mirrors that are suitable for low-aberration reflective focusing of inert atom beams, such as those required for the construction of a scanning helium microscope. The electrostatic and elastic aspects of the problem are coupled in the simulation. Additionally, realistic inhomogeneities in the crystal thickness are considered and it is shown that adaptive optic protocols using a minimal number of optimized electrodes can correct the resultant mirror aberrations.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/44/18/185501