Temperature-dependent gas phase ion trap experiments performed under multicollision conditions reveal a strongly size-dependent reactivity of Pd(x)(+) (x = 2-7) in the reaction with molecular oxygen. Yet, a particular stability and resistance to further oxidation is generally observed for reaction products with two oxygen molecules, Pd(x)O4(+). Complementary first-principles density functional ...

In the last decades an important number of research papers published on nano chip electrode and cathode electrochromic materials. Tantalum (Ta) with so high melting point can be as a good candidate for the future of nano chip devices. However, its surface has not enough trap centers and/or occupation states, so nitrogen ions exposed on Ta surafce, may solve this problem. For this purpose, in th...

We report on the present state of commissioning of the cryogenic electrostatic trap for fast ion beams (CTF) at the Max-Planck-Institut für Kernphysik in Heidelberg. The device has recently passed a cryogenic test, during which the trap was cooled down by 1.8 K superfluid helium. No leaks of the helium supply system were observed, the temperature below 10 K was reached, and the required positio...

Attempts at quantum theories of gravity as well as tantalizing astrophysics results suggest a need to examine the stability of fundamental constants with respect to position and time. We have chosen to investigate time-variation of the electron-proton mass ratio (μ), as this dimensionless number is critical to our understanding of fundamental interactions. We plan to observe shifts in certain e...

A new method for ion extraction from an anharmonic electrostatic trap is introduced. Anharmonicity is a common feature of electrostatic traps which can be used for small scale spatial confinement of ions, and this feature is also necessary for autoresonant ion extraction. With the aid of ion trajectory simulations, novel autoresonant trap mass spectrometers (ART-MSs) have been designed based on...

for Workshop Ion Trap Technology, February 16 – 17, 2011, NIST Quantum Interference and Superradiance from entangled Atoms R.Wiegner, J. von Zanthier, G. S. AgarwalInstitut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Erlangen, GermanyDepartment of Physics, Oklahoma State University, Stillwater, Oklahoma, USA Recent years have seen the ability to create large ...

English This thesis considers the interaction between N ions confined in an ion trap and a set of laser fields, described by the Dicke model. The Dicke Hamiltonian for the two different models, used by the research group at the University of Innsbruck (the Quantum Optics and Spectroscopy group) and the Quantum Optics group at the National Institute of Science and Technology in Boulder, Colorado...