Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-23T23:48:02.767Z Has data issue: false hasContentIssue false

The Proposed Doppler Electron Velocimeter and the Need for Nanoscale Dynamics

Published online by Cambridge University Press:  14 March 2018

Phillip L. Reu*
Affiliation:
Sandia National Laboratories,†Albuquerque, NM

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

As engineering challenges grow in the ever-shrinking world of nano-design, methods of making dynamic measurements of nano-materials and systems become more important. The Doppler electron velocimeter (DEV) is a new measurement concept motivated by the increasing importance of nano-dynamics. Nano-dynamics is defined in this context as any phenomenon that causes a dynamically changing phase in an electron beam, and includes traditional mechanical motion, as well as additional phenomena including changing magnetic and electric fields. The DEV is only a theoretical device at this point. This article highlights the importance of pursuing nano-dynamics and presents a case that the electron microscope and its associated optics are a viable test bed to develop this new measurement tool.

Type
Research Article
Copyright
Copyright © Microscopy Society of America 2007

Footnotes

Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000.

References

1. Gabor, D., “Microscopy by reconstructed wave-fronts,” Proc. Roy. Soc. A, 197, 454, 1949.Google Scholar
2. Tonomura, A., “Applications of electron holography,” Reviews of Modern Physics, 59, 639, 1987.Google Scholar
3. Missiroli, G.F., Pozzi, G., Valdrè, U., “Electron interferometry and interference electron microscopy,” J. Phys. E: Sci. Instrum., 14, 649, 1981.Google Scholar
4. Völkl, E., Allard, A.F., Joy, D.C., Introduction to Electron Holography, Kluwer Academc/Plenum Publishers, New York, 1999. The first chapter is wrtten by Möllenstedt himself and describes the development of the electron biprism.Google Scholar
5. Hirayam, T., Chen, J., Tanji, T., Tonomura, A., “Dynamic observation of magnetic domains by on-line real-time electron holography,” Ultramicroscopy, 54, 9, 1994.Google Scholar
6. Reprinted from Möllenstedt, G., Lichte, H., “Doppler shift of electron waves,” Proc. 9th International Congress on Electron Microscopy, Toronto, 1978, pp. 178179, with permission from the Microscopy Society of Canada.Google Scholar
7. Zhou, F., “Coherence and incoherence of inelastically scattered electron waves,” Ultramicroscopy, 92, 293, 2002.CrossRefGoogle ScholarPubMed
8. Van Dyck, D., Lichte, H., Spence, J.C.H., “Inelastic scattering and holography,” Ultramicroscopy, 81, 197, 2000.Google Scholar
9. Reprinted from Spence, J.C.H., Zou, J.M., “Does electron holography energy-filter?Ultramicroscopy, 69, 185, 1997, used with permission from Elsevier.Google Scholar
10. Reu, P.L., Hansche, B.D., “Widefield laser Doppler vibrometer using high-speed cameras,” 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2006.Google Scholar
11. McMorran, B., Perreault, J., Savas, T.A., and Cronin, A., “Diffraction of 0.5 keV electrons from free-standing transmission gratings,” Ultramicroscopy 106 (2006) 356.Google Scholar