The HASPIDE project: Detectors for medical physics.
Talamonti C., Pallotta S., Grimani C., Calcagnile L., Caricato A.P., Cirrone G.A.P., Croci T., Di Lorenzo R., Fabi M., Falciglia P.P., Frontini L., Cuttone G., Gianfelici B., Ionica M., Italiani M., Kanxheri K., Large M., Liberali V., Martino M., Maruccio G., Mazza G., Menichelli M., Milluzzo G.G., Monteduro A.G., Morozzi A., Moscatelli F., Paolucci M., Passeri D., Patti I.V., Pedio M., Petasecca M., Petringa G., Peverini F., Piccolo L., Placidi P., Quarta G., Rizzato S., Rossi G., Stabile A., Torrisi A., Wheadon R.J., Villani M., Wyrsch N., Servoli L.
One of the goals of the INFN HASPIDE project (Hydrogenated Amorphous Silicon DEtectors) is to explore the possibility to use a-Si:H detectors for medical physics applications. The choice of this material as sensitive layer is driven by its resistance to radiation damage which allows the sensors to operate in very harsh conditions like, $e.g.$, in FLASH therapy. Furthermore, the sensitive layer could be very thin (order of a few micrometers) and it could be deposited on a variety of substrates, including thin flexible plastic layers of Polyimide which allows to develop sensor matrices with a great variety of shapes. First tests with a 1D prototype on clinical photon beams demonstrate that the device has a linear response as a function of the dose rate and it is fast enough to detect and measure the dose delivered by every single pulse.