Speakers
Description
A longitudinal localized kick-driven fast extraction technique has been employed to enable three-dimensional (3D) proton pencil beam scanning (PBS) at ultra-high dose rate (FLASH) for large-volume targets. However, it was observed that the longitudinal line density of the proton bunch significantly influences spot dose accuracy. In this study, a hollow bunch method—implemented by using two harmonic waves to manipulate the longitudinal phase space—is applied to reduce the line density in the extraction region. The RF parameters are carefully chosen so that the evolution of the phase space satisfies the requirements. Simulations conducted with the SynTrack code demonstrate that this method can effectively reduce the line density in the extraction region, thereby offering the potential to improve spot dose accuracy.
Funding Agency
This work was supported by the National Natural Science Foundation of China (No. 12075131).
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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