Focusing a deterministic single-ion beam
Abstract
We focus down an ion beam consisting of single 40Ca+ ions to a spot size of a few mum using an einzel-lens. Starting from a segmented linear Paul trap, we have implemented a procedure which allows us to deterministically load a predetermined number of ions by using the potential shaping capabilities of our segmented ion trap. For single-ion loading, an efficiency of 96.7(7)% has been achieved. These ions are then deterministically extracted out of the trap and focused down to a 1sigma-spot radius of (4.6 \pm 1.3)mum at a distance of 257mm from the trap center. Compared to former measurements without ion optics, the einzel-lens is focusing down the single-ion beam by a factor of 12. Due to the small beam divergence and narrow velocity distribution of our ion source, chromatic and spherical aberration at the einzel-lens is vastly reduced, presenting a promising starting point for focusing single ions on their way to a substrate.
Cite
@article{arxiv.0912.1258,
title = {Focusing a deterministic single-ion beam},
author = {Wolfgang Schnitzler and Georg Jacob and Robert Fickler and Ferdinand Schmidt-Kaler and Kilian Singer},
journal= {arXiv preprint arXiv:0912.1258},
year = {2014}
}
Comments
16 pages, 7 figures