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Stored and Cooled Ions Division
 
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Tel.: +49 6221 516-851
Fax: +49 6221 516-852
Postal Address
Max Planck Institute for Nuclear Physics
P.O. Box 10 39 80
69029 Heidelberg
Visitor Address
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Saupfercheckweg 1
Building: Gentner lab, room 134
69117 Heidelberg

 

Advanced seminar, SS15

Physics with stored and cooled ions

Seminar room Blaum
fortnightly, on Wednesdays 15:00


Seminar program


Date: 22 Apr 2015
Speaker: Dr. Laurent Wiesenfeld, Laboratoire d'Astrophysique de Grenoble
Title: Molecular Collisions for Astrophysics: Theory and Experiments

Abstract

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.

 

Date: 6 May 2015
Speaker: Prof. Frank Arnold, MPIK-Heidelberg and DLR-IPA München
Title: Atmospheric Ions - Pioneering Mass Spectrometric Measurements on Rockets, Stratospheric Balloons, and Air Planes

Abstract

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.

 

Date: 20 May 2015
Speaker: Dr. Phillipp Bräunig, Uni Heidelberg
Title: Atom Optical Tools for Antimatter Experiments

 

Date: 24 Jun 2015
Speaker: Dr. Sebastian George, MPIK
Title: The Cryogenic Storage Ring (CSR) project: commissioning and first results

 

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

 

Date: 22 Jul 2015
Speaker: Dr. Andreas Mooser, CERN
Title: The Magnetic Moments of the Proton and the Antiproton