Abstract: The existing external beamline at the Microanalytical Center of the Jo��ef Stefan Institute (JSI) in Ljubljana has been currently upgraded in order to extend the capabilities towards in-air PIXE imaging across relatively large sample surface area (~ 1 cm2) with lateral resolution of sub 100 ��m. For that purpose, a doublet of magnetic quadrupole lenses was installed on the beamline together with the newly designed exit nozzle with a 200 nm Si3N4 exit window resulting finally in ~ 50��50 mm2 lateral resolution. Additionally, an in-va...
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