Berlin 2005 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

Q: Quantenoptik und Photonik

Q 6: Poster Ultrakalte Moleküle

Q 6.4: Poster

Freitag, 4. März 2005, 11:00–12:30, Poster HU

Sympathetic Cooling of Molecular Ions embedded in Ba⁺ ion crystals: Exploration of the Coolable Mass Range — •Alexander Ostendorf, Bernhard Roth, Chaobo Zhang, and Stephan Schiller — Heinrich-Heine-Universitaet Duesseldorf

Ultracold molecular ions embedded inside Coulomb crystals are very promising for a variety of studies in molecular physics, quantum optics and fundamental physics.

We have developed a versatile experimental setup suitable for sympthetic cooling of molecular ions covering the wide mass range from 20 up to 20.000 amu. As coolant we use lasercooled ¹³⁸Ba⁺- ions in a linear rf-trap. So far we have produced lasercooled Barium ion crystals of different sizes and shapes by varying trapping parameters and the amount of Barium. We also succeeded in embedding Ar⁺ and CO₂⁺ in the ion crystals corresponding to a mass ratio of m_Ba/m_SympCooled=3.45 which to our knowledge is the largest value achieved so far.

We will also report on the extension of the apparatus to cool heavy multiply charged molecules generated by electrospray ionization and transferred to the experimentation chamber.