Orateur
Description
Four new microdosimetry systems based in multi-arrays of 3D silicon detectors and covering distances of several centimeters have been developed, characterized, and tested. The devices are based on individual detectors having a cylindrical shape and a size comparable to that of human cells (20 µm-thick, 25 µm-diameter). The four systems consist of different configurations and geometries of arrays containing between hundreds and thousands of those microdetectors. Irradiations with protons at several energies in the range of 6-24 MeV and at clinical-equivalent fluence rates have been carried out at the Accélérateur Linéaire et Tandem à Orsay (ALTO) facility to characterize, test and calibrate the new systems. The results presented here show the good performance of these novel devices to characterize the intensity of ion beams and to measure microdosimetry quantities with a resolution between 100 and 250 μm. The devices have also been tested in two French proton therapy centers. These novel microdetector systems can be used for radiobiology experiments, hadron therapy treatment planning, and other irradiation applications.
