Design of high-gradient C-band linacs for VHEE-FLASH radiotherapy.
Faillace L., Alesini D., Bisogni G., Bosco F., Carillo M., Cirrone P., Cuttone G., De Arcangelis D., De Gregorio A., Di Martino F., Ficcadenti L., Francescone D., Franciosini G. , Gallo A., Migliorati M., Mostacci A., Palumbo L., Patera V., Pensavalle J., Torrisi G., Sarti A., Spataro B., Vannozzi A., Giuliano L.
The use of Very High Electron Energy (VHEE) electron beams could represent a valid technique for the treatment of deep tumors in the scenario of the FLASH effect. For the translation to clinical practice, the electron energy should be varied in the range 60-130 MeV. The needed electron peak current is the order of 200 mA, that is 200 nC per $1 \mu s$ pulse. The irradiation system also requires compactness for the installation inside a hospital or treatment facility. In order to satisfy both requirements, $i.e.$, high energy and compact system, we propose a radio-frequency (RF) linear accelerator-based electron-beam source working in C-band at 5.712 GHz. In particular, we present the RF design and beam dynamics of optimized high-gradient C-band linear accelerating structures for the transport of high beam current beams for FLASH applications.