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Stored and Cooled Ions Division
 
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Fax: +49 6221 516-852
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Max Planck Institute for Nuclear Physics
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Advanced seminar, WS15/16

Physics with stored and cooled ions

Seminar room Blaum
fortnightly, on Wednesdays 15:00


Seminar program


The talk had to be cancelled !
Date: 21 Oct 2015
Speaker: Dr. Annette Svendsen, Aarhus University
Title: Analysis of ionic photofragments stored in the SAPHIRA storage ring

 

Date: 4 Nov 2015
Speaker: Dr. Boris Zelener, FAIR-Russia Research Center, ITEP and Kurchatov Institute
Title: Simulations of trapping anti-hydrogen atoms. Theory and experiment

Abstract

A study of anti-hydrogen atoms is very important for fundamental physics. In the experiments in CERN [1] anti-hydrogen atoms are created by mixing of cold antiprotons and positrons in magnetic trap. We have made theoretical studies of the relaxation processes in the presence of strong magnetic field (1-3 Tesla) using molecular dynamics technique [2]. The calculated de-acceleration rates are different for particles with velocities which parallel and perpendicular to the applied magnetic field. The creation of anti-hydrogen atoms can occur under condition when parallel velocities of the particles are still high. It may limit the production of trapped anti-hydrogen atoms in the existing experimental arrangements. In order to increase the number of trapped anti-hydrogen atoms the optical cooling methods can be used. We suggest perform experimental simulations of anti-hydrogen trapping with MOT for lithium atoms. As the first step we have studied of highly-excited states of ultracold lithium-7 atoms by using tunable UV-laser. The diagnostic of Rydberg transitions of lithium atoms in MOT is developed [3]. In our work the results for different Rydberg states nS, nP, nD, nF with quantum number n from 38 to 161 will be presented. In future a modified trap for anti-hydrogen atoms will be assembled at facilities of An International Facility for Antiproton and Ion Research (FAIR). The work was supported by Research Center FAIR (FAIR, Russia).

References
[1] G. B. Andresen, M. D. Ashkezari, M. Baquero-Ruiz, et al. Nature 468, 673 (2010).
[2] A. A. Bobrov, S. Ya. Bronin, B . B. Zelener, et al. JETP 14, 185 (2013).
[3] B . B. Zelener, S.A. Saakyan, V.A. Sautenkov, et al. JETP, 148, 5 (2015).

 

Please note change of time !
Date: 18 Nov 2015, 16:00
Speaker: Prof. Ed Myers, Florida State University
Title: Atomic Mass Measurements of Tritium and Helium-3

 

Date: 2 Dec 2015
Speaker: Johannes Simonis, Uni Darmstadt
Title: Three-nucleon forces: From oxygen to calcium

 

The talk had to be cancelled !
Date: 13 Jan 2016
Speaker: Dr. Nathan Leefer, Uni Mainz
Title: Searching for new physics with atomic systems

 

Date: 27 Jan 2016
Speaker: Dr. Szilard Nagy, MPIK
Title: Towards ground-state properties of thermal-neutron-induced fission products with TRIGA-SPEC