  Discharge capillary-based active plasma lenses are a promising new technology
for strongly focusing charged particle beams, especially when combined with
novel high gradient acceleration methods. Still, many questions remain
concerning such lenses, including their transverse field uniformity,
limitations due to plasma wakefields and whether they can be combined in
multi-lens lattices in a way to cancel chromaticity. These questions will be
addressed in a new plasma lens experiment at the CLEAR User Facility at CERN.
All the subsystems have been constructed, tested and integrated into the CLEAR
beam line, and are ready for experiments starting late 2017.
