Show simple item record

dc.contributor.authorReisinger, Thomaseng
dc.contributor.authorHolst, Bodileng
dc.date.accessioned2011-09-29T14:59:41Z
dc.date.available2011-09-29T14:59:41Z
dc.date.issued2008eng
dc.PublishedJournal of Vacuum Science and Technology B 26, 2374en
dc.identifier.urihttps://hdl.handle.net/1956/5038
dc.descriptionErrata: The turbo pump used to pump the source chamber is 3200 l/s for helium and 2200 l/s for nitrogen.en
dc.description.abstractFocusing of neutral atoms and molecules has several potential applications. The very first microscopy images using helium as an imaging probe were published earlier this year. Another possible application is to study the diffusion of atoms and molecules through materials with high spatial resolution by stepping a porous or permeable sample across the focused beam. With this application in mind, the authors present the best resolution transmission images hitherto achieved with helium atoms less than 2 m of a thin carbon film with 2 m holes. Furthermore, they present the first experiment using a Fresnel zone plate to focus neutral molecules. They used a beam of deuterium D2 which was focused down to 15.2 0.5 m. D2 was chosen because it fits in mass to the geometry of our system, which is optimized for helium. However, the method can be extended to hydrogen H2 or other molecules by using a suitably adapted zone plate. In both cases the focus was limited by chromatic aberrations, caused by the velocity spread of the beams. Finally, they present calculations exploring the resolution limits for focusing of molecular beams using Fresnel zone plates. The calculations show that Fresnel focusing down to 170 nm full width at half maximum is possible with presently available techniques.en_US
dc.publisherAmerican Institute of Physicsen_US
dc.relation.ispartof<a href="http://hdl.handle.net/1956/5039" target="blank">Free-standing, axially-symmetric diffraction gratings for neutral matter-waves: experiments and fabrication</a>en_US
dc.titleNeutral atom and molecule focusing using a Fresnel zone plateen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright American Vacuum Society. All rights reserved.en_US
dc.identifier.doihttps://doi.org/10.1116/1.2987955
dc.subject.nsiVDP::Mathematics and natural science: 400::Physics: 430en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record