HB2025 - the 71st ICFA Advanced Beam Dynamics workshop on High-Intensity and High-Brightness Hadron Beams

Longitudinal localized kick driven fast extraction method for 3D PBS proton FLASH delivery

THFA04

Oct 23, 2025, 2:45 PM

5m

Room A (Conference Center)

Flash Poster Presentation WGA:Beam Dynamics in Rings THFA WGs flash talks

Speaker

Yang Xiong (Tsinghua University)

Description

The challenge of delivering FLASH irradiation to large volume targets within 100 ms using 3D pencil beam scanning (PBS) persists. A novel scanning scheme based on a rapid-cycling synchrotron (RCS) is proposed. This work introduces a longitudinal localized kick driven fast extraction method used in the scheme. By applying stripline kicker pulses to specific longitudinal segments of the bunch and dynamically adjusting the kick region based on real-time beam density, accurate spot dose delivery is achieved. Simulations show the results of spot dose accuracy and confirm controlled beam loss (<10%) during fall time, demonstrating the method's feasibility for 3D PBS proton FLASH therapy.

Funding Agency

This work was supported by the National Natural Science Foundation of China (No. 12075131).