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Transmission of highly charged ions through nanocapillaries of noncircular cross sections
Stockholm University, Faculty of Science, Department of Physics. Lanzhou University, China.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 5
2014 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 488, 012035- p.Article in journal (Refereed) Published
Abstract [en]

We report on effects from the geometrical shape of the guiding channels on the ion transmission profile. We find that capillaries of rhombic cross section produce rectangular shaped ion transmission profiles and, vice versa, capillaries of rectangular geometry give a rhombic beam shape. Our trajectory simulations for the incidence of 14-keV Ne7+ ions give clear evidence that the observed effect is due to the image forces experienced by the transmitting ions. They gain transverse energy due the image charge attraction towards the inner surfaces of the capillary. This leads to a defocusing of the ions leaving the capillaries. Due to the blocking of large deflection angles at the exit of the capillary, the transmitted ion beam is tailored into certain geometrical patterns.

Place, publisher, year, edition, pages
2014. Vol. 488, 012035- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-106618DOI: 10.1088/1742-6596/488/1/012035ISI: 000338432500035OAI: oai:DiVA.org:su-106618DiVA: diva2:737472
Conference
28th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC), JUL 24-30, 2013, Lanzhou, PEOPLES R CHINA
Note

AuthorCount:5;

Available from: 2014-08-13 Created: 2014-08-12 Last updated: 2017-12-05Bibliographically approved

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