Internal Microbeam

Personnel Responsible: Mª Dolores Ynsa Alcalá

CMAM nanobeam line sits at +30º, just after the standard chamber. In this beamline it is possible to work with a particle beam focused to a diameter of the order of the micron and even below. The beam can scan the target in a controlled way to obtain distribution maps.  These two beam features turn this kind of lines into powerful tools for studies covering quite diverse fields like biomedicine, materials science, archaeometry, earth sciences, among other.

CMAM apparatus, designed and built in Melbourne, uses two sets of diaphragms (object and collimator) and five magnetic quadrupole lenses  to focus the ion beam. At the same time it is provided with a magnetic deflector to perform the beam scan. The samples are positioned inside a vacuum chamber where they can be moved along the x, y, z axes. The reaction chamber is provided with an optical microscope to control, at any time, the target area that is irradiated or analised, as well as several particle detector and an X-ray detector. The set-up allows equally well the analysis and irradiation of both thin (the beam crosses the sample) and thick targets of limited size (not above 1 cm2 ).

This beam line is particularly suited to perform irradiations, under controlled dosis, of very small areas and produce micrometric or submicrometric structures. Furthermore it is possible to apply routinely the PIXE and RBS techniques to obtain elemental distribution maps and the STIM technique on thin samples to study the density variations.


View of the object diaphragma


View of the magnetic quadrupole lenses


View of the collimator diaphragma


Full-view of the nanobeam line