IFAE 2006 pp 353-356 | Cite as

The external scanning proton microprobe in Florence: set-up and examples of applications

  • Lorenzo Giuntini
Conference paper


During 2003, at the LABEC laboratory (labec@fi.infn.it), Firenze, Italy, a new 3MV tandem accelerator was installed, mainly for Accelerator Mass Spectrometry (AMS) and Ion Beam Analysis (IBA) measurements. Our system is equipped with a cesium sputtering ion source for AMS and two sources for IBA applications, i. e. a duoplasmatron and a second cesium sputtering; duoplasmatron is usually preferred for micro beam applications, because, working with this source, it is possible to deliver more intense beam on target. The ion beam is focussed by two electrostatic lenses EL1 and EL2 and mass/energy analyzed by a ∼ 90° dipole magnet; beam waist is some 0.4m after the exit port of this magnet. Here a remotely controlled aperture is installed, to allow beam intensity regulation, and a beam profile monitor BPM1, to control shape, dimensions and intensity of the beam as it is transmitted through the slits; it is also possible to measure the beam current after the slits with a Faraday cup (FC1). The beam is then focussed by the electrostatic lenses EL3 and EL4 just at the entrance of the accelerator, where BPM2 allows monitoring proper beam shaping and FC2 is used to measure the current. The beam is then focalized in the high voltage terminal, inside the stripping canal; as the accelerating column has a strong focussing action, at the entrance of the column, a pre-acceleration electrode is installed, so that, increasing the speed of the ions, the particles are less sensitive to the column focussing.


Accelerator Mass Spectrometry Accelerator Mass Spectrometry Quadrupole Doublet Electrostatic Quadrupole Beam Profile Monitor 
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  1. 1.
    T. Calligaro et al., Development of an external beam nuclear microprobe on the Aglae facility of the Louvre museum, NIM B 161 163 (2000) 328 333CrossRefADSGoogle Scholar
  2. 2.
    M. Massi, Progetto e realizzazione di una facility di microfascio all’acceleratore KN3000 di Firenze, degree thesis, 2000, http://labec.fi.infn.itGoogle Scholar
  3. 3.
    M. Massi et al., The external beam microprobe facility in Florence: Set-up and performance, NIM B190 (2002) 276–282CrossRefADSGoogle Scholar
  4. 4.
    M. Massi, Development of the external proton microbeam line at the new 3MV Tandetron accelerator in Florence, Ph. D thesis, 2005, http://labec.fi.infn.itGoogle Scholar
  5. 5.
    M. Massi et al., Use of micro-PIXE analysis for the identiÞcation of contaminants in the metal deposition on a CMS, NIM B 219–220 (2004) 722–726CrossRefGoogle Scholar
  6. 6.
    N. Grassi et al., Scanning-mode Ion Beam Analysis in Cultural Heritage problems, submitted to NIM BGoogle Scholar

Copyright information

© Springer-Verlag Italia 2007

Authors and Affiliations

  • Lorenzo Giuntini
    • 1
  1. 1.Dipartimento di Fisica dellUniversitàe Sezione INFN FirenzeItaly

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