Researchers from the CQT group (Applied Physics, Gijs ten Haaf and Steinar Wouters) have built the world’s first high-resolution ion microscope for rubidium ions (Rb+).
Front view on the Rb+ FIB at CQT
Letters milled into gold wires that connect an IC to its package using the Rb+ ion microscope
This research is supported by the Dutch Technology Foundation STW (part of NOW), FEI Company (now Thermo-Fisher Scientific), Pulsar Physics and Coherent Inc.
 Background information about laser-cooled ion sources can be read here:J. J. McClelland et al. in Applied Physical Reviews 3, 011302 (2016) (or at the arXiv)  The latest article on the development of the ion source for the Rb+ microscope at CQT can be read here: G. ten Haaf et al. in Physical Review Applied 7, 054013 (2017) (or at the arXiv)