Proposal of a VHEE-linac research laboratory for FLASH radiotherapy in Italy.
Giuliano L., Alesini D., Bisogni G., Bosco F., Cirrone P., Cuttone G., Di Martino F., De Arcangelis D., De Gregorio A., Ficcadenti L., Francescone D., Gallo A., Migliorati M., Mostacci A., Palumbo L., Patera V., Pensavalle J., Torrisi G., Sarti A., Spataro B., Faillace L.
The translation of the FLASH radiotherapy in the clinical practice, requires the use of high-energy accelerators able to treat deep tumours, and Very High Electron Energy irradiations could represent a valid technique. In this scenario the design of a VHEE FLASH linac that will be installed in Italy is under study. Here we will present the preliminary results for a compact C-band system aiming to reach high pulse current necessary to deliver high dose per pulse and ultra-high dose rate required for the FLASH effect. The proposed system is composed of a low energy high current injector linac followed by a modular section of high acceleration gradient structures. To obtain the maximum energy, an energy pulse compressor option is also considered. CST code has been used to define the required RF parameters of the linac. The beam dynamics simulations have been performed using T-Step, ASTRA and GPT tracking codes. The VHEE linac suitable to satisfy FLASH criteria was simulated. Preliminary results show the possibility to obtain an energy range of 60-130 MeV, with a peak current of 200 mA (200 nC per $ \mu s$).