Longitudinal beam splitting and coalescing using an off-momentum drifting barrier bucket

Yoshimoto, Takashi; Hirose, M.; Liu, X.; Takayama, Ken; Adachi, Toshikazu; Okamura, Katsuya; Kadokura, E.; Kawakubo, T.; Takano, S.; Munemoto, Naoya

doi:10.1103/physrevaccelbeams.24.100401

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…T. Yoshimoto et al have studied rectangular pulse beam splitting operation [1]. In terms of multienergy fast extraction of synchrotrons, Leo Kwee Wah and Takumi Monma et al proposed a continuous energy sweep scanning method [2].…”

Section: Introductionmentioning

confidence: 99%

Longitudinal splitting of bunches with variable energies in synchrotron

Li,

Yao,

Zheng

et al. 2024

J. Phys.: Conf. Ser.

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The ever-enriching beam application has put for-ward more demands on accelerators. If multiple bunches of different energies can be extracted for FLASH point scanning in a short time (< 500 ms), the spatial dose distribution advantage of proton Bragg peak can be combined with the temporal effect ad-vantage of FLASH. This paper provides three methods for generating short bunches in synchrotron. By adjusting the pulse parameters of the barrier voltages in the induction synchrotron, the short bunches can be easily generated. The short bunches can be kicked out of the beam reference orbit by kickers. When the pro-cess is repeated for many times, and the energy-changing process is added to the time interval during which the short bunches are continuously generated, the short bunches of multiple energies can be extracted in one working cycle. By finely controlling the changes of rectangular pulses, the number of particles in the short bunches can be better controlled, making an important contribution to further enriching the application of synchrotron.

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Section: Introductionmentioning

confidence: 99%

Longitudinal splitting of bunches with variable energies in synchrotron

Li,

Yao,

Zheng

et al. 2024

J. Phys.: Conf. Ser.

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Step-barrier dynamical system

Takayama

2023

Physics of Plasmas

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The step-barrier dynamical system is discussed in detail. The behavior of particles captured in the barrier bucket remarkably varies depending on their initial conditions. The intrinsic nature of motion observed in the fully normalized area-preserving mapping simulations is simply clarified by a value of energy or momentum of particle at the initial stage. A rational initial value of y in the normalized phase space (x, y) at beginning leads to the periodic solution. Meanwhile, an irrational value of y gives the oscillation in amplitude with multi-frequency, resulting in broad tracks in the phase space. Effectively, the barrier bucket size is reduced due to these broad tracks. We arrive at the concept of effective stable region, which is defined by the contour of the averaged step-barrier Hamiltonian and useful in actual applications.

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Deviation Wing Loss for High-Performance 2D Pose Estimation

Li,

Xing,

et al. 2024

2024 IEEE International Conference on Multimedia and Expo (ICME)

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Longitudinal beam splitting and coalescing using an off-momentum drifting barrier bucket

Cited by 3 publications

References 15 publications

Longitudinal splitting of bunches with variable energies in synchrotron

Longitudinal splitting of bunches with variable energies in synchrotron

Step-barrier dynamical system

Deviation Wing Loss for High-Performance 2D Pose Estimation

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