Publication in "Review of Scientific Instruments"

Compact physics package and fiber delivery of light for Al-Ca Quantum Logic Clock.

For our transportable 27Al+ optical ion clock setup we developed a simple and compact physics and laser package for manipulation of 40Ca+. Important features are a segmented multi-layer trap with separate loading and probing zones, a compact titanium vacuum chamber, a near-diffraction-limited imaging system with high numerical aperture based on a single biaspheric lens, and an all-in-fiber  40Ca+ repump laser system. From measurements with a single calcium ion we derive a preliminary estimate of the trap-induced frequency shifts on 27Al+ of 1.9x10^-18.

Link to the paper.