CNRS Université Bordeaux

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General layouts


Since one of the main objectives of AIFIRA project is the achievement of a nanometric beam with lateral resolution less than 100 nm, it has been installed in a new building especially designed to avoid any perturbations from mechanical vibrations and thermal effects and equipped with concrete radiation shielding for fast neutron experiments.



Sketch of a beam line configuration (here: the nanobeam line [1])


The object slits are positioned at the exit of the 90° analysing magnet and before the Singletron™ switching magnet used to deflect the particles in the different beam lines. For micro- and nanometric beam, the full beam line is supported by a massive granite monolith in order to avoid any parasitic vibrations. Two aperture diaphragms (CA and CB) can be inserted into the beam path to collimate the particles scattered at large angles.


Beam lines overview


Switching magnet and beam lines

AIFIRA beam lines


Five beam lines are available (from right to left on the picture) for various applications as:


    ♦ Production of fast mono energetic neutrons (100 keV-6.5 MeV and up to 20 MeV) using (p, Li), (p,T), (D,D) and (D,T) nuclear reactions


    ♦ Focused micro- and nano-beams for analysis, material imaging and characterization (PIXE, RBS, NRA, STIM,...) at micronic and sub-micronic scales


    ♦ Macrometric beam for material analysis


    ♦ External beam for material and archeo-materials characterisation in air


The nanoprobe takes advantage of the outstanding performances of the accelerator in terms of beam brightness and energy stability. New research fields such as nanotechnology and nanobiology will be addressed using this instrument. Furthermore AIFIRA is one of the few modern experimental facilities in Europe offering the possibility to perform experiments with fast mono energetic neutrons in this energy range.




[1] Barberet P. et al. 2009 Nuc Instr Meth Phys Res B 267, 2003