Design and validation of a proton beam line based on a rapid-cycling synchrotron for Flash radiation

Shi Ying; Zhang Manzhou; Li Deming; Han Xuejian; Sun Peihan

doi:10.11884/HPLPB202537.250003

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Shi Ying, Zhang Manzhou, Li Deming, et al. Design and validation of a proton beam line based on a rapid-cycling synchrotron for Flash radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250003

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Shi Ying, Zhang Manzhou, Li Deming, et al. Design and validation of a proton beam line based on a rapid-cycling synchrotron for Flash radiation[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250003

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Design and validation of a proton beam line based on a rapid-cycling synchrotron for Flash radiation

doi: 10.11884/HPLPB202537.250003

Shi Ying^{1, 2
,},
Zhang Manzhou^{1, 2, 3
,
,},
Li Deming^{1, 2},
Han Xuejian^{1, 2},
Sun Peihan^{1, 2}

1.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
2.
University of Chinese Academy of Sciences, Beijing 101408, China
3.
Shanghai Apactron Particle Equipment Co., Ltd, Shanghai 201800, China

Received Date: 2025-01-06
Accepted Date: 2025-04-07
Rev Recd Date: 2025-04-08

Available Online: 2025-06-17

Abstract

Abstract

We design a proton beamline based on a rapid-cycling synchrotron for Flash radiation with ultra-high dose rate. Because proton beams can be extracted within hundreds of nanoseconds in the rapid-cycling synchrotron, its energy may be altered from one cycle to the next with different extraction time. The intended beamline system can realize layer stacking irradiation at an instantaneous dose rate of 10⁷ Gy/s. Each of longitudinal layer requires a different beam intensity. The target is divided longitudinally into different layers, each of which needs a different beam energy, in order to produce a uniform irradiation field. The system, including a double scatter system, a range compensator, a ripple filter, and a multi-leaf collimator to maximize proton fluence into the target, is simulated using the Monte Carlo software FLUKA. Three different kinds of ripple filters are built in the low, medium, and high energy zones based on the original Bragg peaks in order to decrease the number of energy layers and shorten the total irradiation duration. These filters transform the spike region into a Gaussian distribution with flat expansion areas of 2 cm, 6 cm, and 20 cm, respectively. Combining the rapid-cycling synchrotron with the layer stacking irradiation provides a novel method for realizing Flash proton irradiation, which delivers an ultra-high dose rate to the target.
- proton therapy,
- Flash effect,
- beam delivery system,
- layer stacking,
- rapid-cycling synchrotron

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References(32)

References

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