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Tailoring of keV-Ion Beams by Image Charge when Transmitting through Rhombic and Rectangular Shaped Nanocapillaries
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
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2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 108, no 19, 193202- p.Article in journal (Refereed) Published
Abstract [en]

We report on an unexpected effect of tailoring transmission profiles of Ne7+ ions through nanocapillaries of rhombic and rectangular cross sections in mica. We find that capillaries of rhombic cross sections produce rectangular shaped ion transmission profiles and, vice versa, that capillaries of rectangular geometry give a rhombic beam shape. This shaping effect only occurs for transmitted ions and is absent for the small fraction of neutralized particles. The experimental findings and simulations of the projectile trajectories give clear evidence that the observed effect is due to the image forces experienced by the transmitting ions. This novel beam shaping mechanism suggests applications for the guiding, focusing, and shaping of ion beams.

Place, publisher, year, edition, pages
2012. Vol. 108, no 19, 193202- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-80100DOI: 10.1103/PhysRevLett.108.193202ISI: 000303662500005OAI: oai:DiVA.org:su-80100DiVA: diva2:554241
Note

 AuthorCount:6;

Available from: 2012-09-19 Created: 2012-09-12 Last updated: 2017-12-07Bibliographically approved

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Zhang, Hongqiang Q.Akram, NadeemSkog, PatrikSchuch, Reinhold
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