Heidelberg 2015 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Clusters in Molecular Physics (with MO & MS)
A 25.4: Vortrag
Mittwoch, 25. März 2015, 15:30–15:45, PH/SR106
First experiments with cooled clusters at the Cryogenic Trap for Fast ion beams — •Christian Meyer1, Klaus Blaum1, Christian Breitenfeld1,2, Sebastian George1, Juergen Goeck1, Jonas Karthein1, Thomas Kolling3, Jennifer Mohrbach3, Gereon Niedner-Schatteburg3, Lutz Schweikhard2, and Andreas Wolf1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Institut für Physik, Ernst-Moritz-Arndt Universität, 17487 Greifswald, Germany — 3Fachbereich Chemie, TU Kaiserslautern, Germany
The Cryogenic Trap for Fast ion beams (CTF) is an electrostatic ion beam trap for the investigation of charged particles in the gas phase located at the "Max-Planck-Institut für Kernphysik" in Heidelberg. It is suited to study thermionic and laser-induced electron emission of anions with complex multi-body structure such as clusters and molecules. They can be stored up to several minutes due to the low restgas pressure of 10−13 mbar [1] in an ambient temperature down to 15 K. The experiments were so far hampered by the ion production in a sputter source leading to excited particles with high rovibrational states. In order to be able to investigate the ground state properties of such systems a new supersonic expansion source [2] has been implemented. A laser-induced plasma is expanded into vacuum by short pulses (50 µ s) of a helium carrier gas and thereby rovibrationally cooled. First tests with metal cluster will be presented
and discussed.
M. Lange et al., Rev. Sci. Instr., 81,055105 (2010)
C. Berg et al., J. Chem. Phys. 102, 4870 (1995)