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Abteilung für gespeicherte und gekühlte Ionen
Max-Planck-GesellschaftMax-Planck-Institut für KernphysikUniversität Heidelberg Abteilung für gespeicherte und gekühlte Ionen
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Tel.: +49 6221 516-851
Fax: +49 6221 516-852
Max-Planck-Institut für Kernphysik
Postfach 10 39 80
69029 Heidelberg
Max-Planck-Institut für Kernphysik
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69117 Heidelberg


Oberseminar, SS15

Physik mit gespeicherten und gekühlten Ionen

Seminarraum Blaum
14tägig, mittwochs 15:00


Datum: 22 Apr 2015
Redner: Dr. Laurent Wiesenfeld, Laboratoire d'Astrophysique de Grenoble
Titel: Molecular Collisions for Astrophysics: Theory and Experiments


In order to retrieve actual molecular abundances from astrophysical observations of molecular spectral lines, knowledge of the rotational levels excitation schemes is essential. Actual excitation results from a trade-off between photon excitation and collisional excitation by the main constituents of the interstellar gas, molecular hydrogen, and, to a lesser extent, atomic hydrogen and helium. These inelastic collisional rates are almost always obtained from theoretical investigations, by computing classical or quantum dynamics of the interaction of molecules with these colliders. In order to assess the quality of the computations, a systematic comparison with experiments is being undertaken. Observables are mainly integral or differential cross-sections as well as pressure broadening cross sections. We shall present recent computations and various types of experiments, in order to illustrate the need for both laboratory work and computational work for the quantitative understanding of astrochemistry.


Datum: 6 Mai 2015
Redner: Prof. Frank Arnold, MPIK-Heidelberg and DLR-IPA München
Titel: Atmospheric Ions - Pioneering Mass Spectrometric Measurements on Rockets, Stratospheric Balloons, and Air Planes


New insights into atmospheric ion processes and their implications are discussed. These processes include interactions between ions, free electrons, trace gases, and aerosol particles. Emphasis is placed upon ion-induced aerosol formation. Another fascinating aspect of atmospheric ions is their role as a tool for obtaining unique information on important atmospheric trace species, including trace gases and aerosol particles. This application yields information also on atmospheric trace species having key roles in the atmospheric climate system and in atmospheric environmental problems.


Datum: 20 Mai 2015
Redner: Dr. Phillipp Bräunig, Uni Heidelberg
Titel: Atom Optical Tools for Antimatter Experiments


Datum: 24 Jun 2015
Redner: Dr. Sebastian George, MPIK
Titel: The Cryogenic Storage Ring (CSR) project: commissioning and first results


Datum: 1 Jul 2015
Redner: Dr. Dmitry Strelnikov, Karlsruher Institut für Technologie (KIT)
Titel: Optical Spectroscopy of Fullerene Ions in Cryogenic Matrixes. Implications for Astronomy


Datum: 22 Jul 2015
Redner: Dr. Andreas Mooser, CERN
Titel: The Magnetic Moments of the Proton and the Antiproton