Open Access Publications from the University of California

## Implementation of a Rotationally Symmetric Ring Ion Trap and Coherent Control of Rotational States

• Author(s): Urban, Erik Gron
In this thesis, I present the design, implementation, and characterization of a novel, rotationally symmetric ion trap. Our compact design creates a toroidal trapping potential for charged atoms that has a radius that is much smaller than the height at which the ions are positioned above the surface of the trap. We trap ions at a height of 385~$\mu$m and a radius of 45~$\mu$m as expected from simulation. We demonstrate that this ring is rotationally symmetric with imperfections in the potential of much less than 3~mK.