Heavy ion beams monitoring for radiobiology applications

We describe the design and the construction of an on-line ion beam monitor. The device provides accurate measurements for radiobiology experiments currently held at GANIL (Grand Accelerateur National d'Ions Lourds) in France. A prototype named IBIS (Ion Beam Inspection System) has been tested at GANIL with Ne (13.7 A.MeV), O (8.37 A.MeV), C (9.07 A.MeV and 11.12 A.MeV) and Ar (95 A.MeV) beams from 105 to 108 pps. IBIS can provide fluence maps for each biological irradiation with a 2 % uncertainty. It can also be used as a beam imaging device in order to study depth distributions and profiles of the light produced by ions in a plastic scintillator.