Showing papers by "Rainer Blatt published in 1990"
TL;DR: In this paper, the ratio of the mean kinetic energy and the spatial width of ion clouds in Paul traps has been measured and compared with predictions of various models that describe ion cloud dynamics.
Abstract: The ratio of the mean kinetic energy and the spatial width of ion clouds in Paul traps has been measured. The result is compared with predictions of various models that describe ion cloud dynamics in Paul traps.
16 citations
Proceedings Article•
21 May 1990
TL;DR: Paul and Penning traps have been the basis for many high precision experiments during the past years as mentioned in this paper, and the preparation of atomic samples for spectroscopic experiments which are free of perturbations by collisions with walls or buffer gas and by spurious external fields makes the trapping technique a unique tool for a frequency standard.
Abstract: Ion storage in both Paul and Penning traps has been the basis for many high precision experiments during the past years.1 The preparation of atomic samples for spectroscopic experiments which are free of perturbations by collisions with walls or buffer gas and by spurious external fields makes the trapping technique a unique tool for a frequency standard. Moreover, optical cooling2 eliminates systematic shifts and the need for corrections which account for the ion motion.
1 citations
01 Jan 1990
TL;DR: In this article, a trapped Ba+ion interacting with bichromatic laser light is demonstrated, which is caused by (i) stimulated Raman-type two-photon transitions combined with spontaneous Raman scattering, and by (ii) all-stimulated parametric interaction.
Abstract: Novel types of light forces upon a trapped Ba+ion interacting with bichromatic laser light are demonstrated. They are caused by (i) stimulated Raman-type two-photon transitions combined with spontaneous Raman scattering, and by (ii) all-stimulated parametric interaction. These efficient processes liken the generation of stimulated light force in a standing wave (i), and the operation of a free-electron laser (ii). There is no natural limit to the residual kinetic energy of the particle. — When its motion is excited, the ion enters metastable oscillatory states.
11 Jun 1990
TL;DR: In this article, the ground-state hyperfine separation in /sup 171/Yb/sup +/ has been used for the control of an RF oscillator for clock transitions.
Abstract: Trapped Yb/sup +/ ions are investigated for application as a frequency standard. A precision measurement of the ground-state hyperfine separation in /sup 171/Yb/sup +/ has been used for the control of an RF oscillator. Narrow optical lines of Yb/sup +/ are also available for clock transitions. Their application to future frequency standards is indicated. >