Design, fabrication and characterisation of a micro-fabricated double-junction segmented ion trap

Chiara Decaroli, Roland Matt, Robin Oswald, Maryse Ernzer, Jeremy Flannery, Simon Ragg, Jonathan P. Home

Published 2021-03-10Version 1

We describe the implementation of a three-dimensional Paul ion trap fabricated from a stack of precision-machined silica glass wafers, which incorporates a pair of junctions for 2-dimensional ion transport. The trap has 142 dedicated electrodes which can be used to define multiple potential wells in which strings of ions can be held. By supplying time-varying potentials, this also allows for transport and re-configuration of ion strings. We describe the design, simulation, fabrication and packaging of the trap, including explorations of different parameter regimes and possible optimizations and design choices. We give results of initial testing of the trap, including measurements of heating rates and junction transport.