Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 34: Poster II

A 34.32: Poster

Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster

Design of an Ion Deceleration Platform for the Investigation of Slow Ion-Surface Interactions and Ion-Atom Collisions — •Rainer Ginzel, Stuart Higgins, Sven Bernitt, Benjamin L. Schmitt, José R. Crespo López-Urrutia, and Joachim Ullrich — Max-Planck-Institut für Kernphysik, Heidelberg, Deutschland

To study the interaction of highly charged ions (HCIs) with surface or gas targets at low kinetic energies, a novel deceleration platform was constructed at the Heidelberg Electron Beam Ion Trap (EBIT). The new experimental setup will provide a slow, monoenergetic, and well-focused ion beam, allowing both slow ion-surface and ion-atom collisions to be studied in depth. Surface interaction research topics at the MPIK focus on the effects of low kinetic energy HCIs incident on surfaces. Interactions in this regime allow for the study of processes such as the creation of surface nanostructures, and processes involving ion impact induced electron emission, both have been previously investigated at the Heidelberg EBIT at intermediate ion energies. For ion-atom collisions in the gas phase the setup will allow for the study of the energy dependencies of single and multiple electron capture cross-sections at ultra-low impact energies (to 10eV/q). The (n,l)-selective observation of charge exchange processes, relevant to x-ray astrophysics and tokamak plasma diagnostics, are principal motives for the implementation of the new beamline.

The implementation of all beamline components has been completed and performance tests are underway. First experiments with decelerated HCIs on both surface and gas targets will begin soon.