![]() Nowadays, a large number of cancer patients, up to 50%, are treated with radiotherapy (RT). ![]() The fabrication and ad hoc tuning procedures have been optimized and discussed in the paper. (4) Conclusions: The prototype of a C-band linac for FLASH applications was successfully tested with low RF power at Sapienza University. A tuning procedure has been implemented in order to ensure proper operating frequency and to reach a field profile flatness of the order of a few percent. We report and discuss the test measurement results on a full-scale copper prototype, showing good agreement with CST RF simulations. (3) Results: This device is a nine-cell structure operating on the π / 2 mode at 5.712 GHz (C-band). The measurements of the field in the cavity have been done with the bead-pull technique. (2) Methods: We performed the RF electromagnetic design of the prototype of the C band linac using CST STUDIO Suite Code and the RF low power RF test at Sapienza University of Rome. In this contest, Sapienza University, in collaboration with SIT-Sordina IORT Technology spa, is developing a new C-band linac to achieve the FLASH regime. In order to obtain a high dose in a very short time, accelerators with high-intensity currents (the order of 100 mA peak currents) have to be developed. It releases ultra-high radiation dose rates (above 100 Gy/s) in microsecond short pulses. (1) Background: FLASH Radiotherapy (RT) is a revolutionary new technique for cancer cure. In this paper, we illustrate the RF design and measurements of a C-band prototype structure for an Ultra High Dose Rate medical linac. ![]()
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