Speaker: Nico Stolterfoht, Hahn-Meitner-Institut Berlin GmbH, Germany Title: Highly charged ions guided in insulating nanocapillaries Time: Friday, March 13, 11:30-12:30 Place: Fysisk Auditorium Abstract In past few years we performed experiments in which slow highly charged ions are transmitted through capillaries of 100-200 nm diameter and 10 ?m length in a highly insulating Polyethylene Terephthalate (PET) foil. We found that the majority of the transmitted particles preserve their charge state during the passage through the nanocapillaries even when the capillary axis is tilted with respect to the incident beam. This behavior strikingly differs from the transmission of highly charged ions through capillaries in metals studied previously. For insulating PET the angular distributions of the ions have a maximum equal to the tilt angle indicating a ?guiding? of the ions within the capillary. This observation is surprising, since highly charged ions are neutralized with high probability when scattered at the surface in obvious contradiction to the ion guiding results. In the talk the basic mechanisms of ion guiding will be introduced. Moreover, examples for new developments will be given. Scaling laws of guiding for varying energy and charge state of the projectile will presented. Dynamic properties will be discussed in terms of temporary charge patches within the capillaries and visualized by animations of theoretical and experimental results. Peter Staanum and Nicolai Nygaard Coffee, tea and bread rolls will be served at 11.15 ---------------------------------- Peter Frøhlich Staanum Department of Physics and Astronomy University of Aarhus Ny Munkegade 120 8000 Aarhus C Denmark Phone: (+45) 8942 3602 Fax: (+45) 8612 0740 VAT Nr.: DK16562777 EAN Nr.: 5798000419872 ----------------------------------