A deceleration system at the Heidelberg EBIT providing very slow highly charged ions for surface nanostructuring |
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Authors: | R Ginzel SG Higgins P Mrowcynski MC Simon JR Crespo López-Urrutia J Ullrich R Ritter C Vasko AS El-Said F Aumayr |
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Affiliation: | a Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany b Institut für Allgemeine Physik, Technische Universität Wien, Wiedner Hauptstr. 8-10, A-1040 Wien, Austria |
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Abstract: | Recently, it has been demonstrated that each single-impact of a slow (typically 1-2 keV/u) highly charged ion (HCI) creates truly topographic and non-erasable nanostructures on CaF2 surfaces. To further explore the possibility of nanostructuring various surfaces, using mainly the potential energy stored in such HCIs, projectiles with kinetic energies as low as possible are required. For this purpose a new apparatus, capable of focusing and decelerating an incoming ion beam onto a solid or gaseous target, has been installed at the Heidelberg electron beam ion trap (EBIT). An X-ray detector and a position-sensitive particle detector are utilized to analyze the beam and collision products. First experiments have already succeeded in lowering the kinetic energy of HCIs from 10 keV/q, down to ∼30 eV/q, and in focusing the decelerated beam to spot sizes of less than 1 mm2, while maintaining the kinetic energy spread below ∼20 eV/q. |
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Keywords: | Highly charged ions Low energy ions Ion-surface interaction Surface nanostructuring Electron beam ion trap |
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