14th International Conference on Nuclear Microprobe Technology and Applications

P10 - Upgrading the external microbeam facility at INFN-LABEC in Florence: PIXE with carbon microbeams and the forward scattering setup

11 Jul 2014, 13:00

1h

Palazzo del Bo and Centro Culturale San Gaetano, Padova

Board: 10

Poster Poster Session with Cheese and Wine

Speakers

Lisa Castelli (INFN Sezione di Firenze, Firenze, Italy) Lorenzo Giuntini (Università di Firenze, Dipartimento di Fisica e Astronomia and INFN, Sezione di Firenze, Sesto Fiorentino, Firenze, Italy)

Description

At the external scanning microbeam in Florence successful tests have been carried on with carbon ion beams of 10 MeV energy (charge state +4, terminal voltage 2 MV), adopting ultra thin Si3N4 windows (50 and 30 nm thick) for beam extraction: in these conditions, we obtained about 1 nA electrical current (100-200 pA of particles) and beam spot size on sample within 30 micron. First results of the Carbon-PIXE techniques in external (He atmosphere) are presented. We developed a system for the detection, out of the vacuum, of the forward scattered particles (i.e. at scattering angles in the (-90°, 90° interval)), compatible with the existing set-up, for the implementation of complementary analytical techniques, such as the external-STIM (Scanning Transmission Ion Microscopy) and external-FS (Forward Scattering), now both available at our beamline. First successful tests are shortly presented.