Space–charge effect of laser accelerated protons on beam profile and permanent magnet quadrupole focal line

Al-Omari, H.; Hofmann, I.; Bagnoud, V.; Busold, S.; Brabetz, C.; Schumacher, Dennis; Almomani, Ali; Roth, Markus; Deppert, O.

doi:10.1016/j.nima.2020.164523

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…The space-charge is inversely proportional to proton energy and diminishes with the temporal expansion up to the PMQ aperture. It is shown in [31] that the focusing efficiency of a quadrupole stands at 70 mm from a source for a reference proton bunch 9±0.5 MeV is not weakened by the space-charge repulsion. This was for a focused energy 12 times lower than this study.…”

Section: Space-charge Effectmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of a therapeutic laser accelerated proton beam at 94.8 MeV for Stereotactic Radiosurgery

Omari,

Yahia,

Almomani

et al. 2023

Preprint

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Recent advances in laser-accelerated proton technology have unveiled potential applications for Stereotactic Radiosurgery. In this study, we present a beamline simulation designed by TraceWin and SRIM codes to optimize the spectral and spatial properties of a laser-driven proton beam. The simulation incorporates four quadrupoles for beam focusing, an energy selection aperture aided by a cylindrical on-axis absorber, a scatterer, and an angular selection aperture for energy smoothing and collimation. By optimizing the beamline configuration, we have achieved a uniform beam with dose rates surpassing even those utilized in FLASH radiotherapy, allowing the delivery of high doses to millimeter-scale volumes within nanosecond timescales. To validate the efficacy of our beamline for therapeutic applications of radiosurgery, we conducted another comprehensive simulation study on the irradiation of a hypothetical tumor in a head phantom using Geant4 and FLUKA Monte Carlo-based codes. The results demonstrate that the downstream protons exhibit a narrow energy spread of 94.8 ± 3.9 MeV and a homogenized lateral profile with a possible proton dose of 0.022 J/kg at the center of the tumor. The study also included the Boron dose enhancement and secondary radiation environment. By leveraging laser-accelerated protons instead of cyclotrons, our unique platform offers a precise and relatively cost-effective infrastructure for a laser-accelerated proton beam Stereotactic Radiosurgery.

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Section: Space-charge Effectmentioning

confidence: 99%

“…The TNSA and later advanced mechanisms, utilize electrons as a mediator to transfer energy from the laser to ions [30,31]. The advanced mechanisms (RPA-LS, RPA-HB, and BOA) differ in pulse duration and target thickness [28].…”

mentioning

confidence: 99%

Optimization of a therapeutic laser accelerated proton beam at 94.8 MeV for Stereotactic Radiosurgery

Omari,

Yahia,

Almomani

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Laser-plasma accelerated proton beam transport system using high-field pulsed solenoid magnet

Tayyab,

Bagchi,

Husain

et al. 2024

Nuclear Instruments and Methods in Physics Research Section A:

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Laser-driven acceleration of a 94.8 MeV uniform proton beam enhanced by a thin axial absorber rod

Al-Omari,

Yahia,

Almomani

2024

Phys. Rev. Accel. Beams

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Laser-based proton accelerators offer promising advantages for many sensitive applications due to their compact size. However, achieving uniform beams with a narrow energy spread remains a challenge. Here, a beamline simulation is performed using the racein and codes to optimize the spectral and spatial characteristics of a laser-driven proton beam. This beamline, comprised of four magnetic quadrupoles and equipped with a thin axial absorber rod in conjunction with an energy selection aperture for narrowing the energy spread, a carbon scatterer foil for beam spot smoothing, and an angular selection aperture for beam collimation, effectively transports a selected proton beam energy within the range of 50–250 MeV. In this work, laser-accelerated protons with a wide energy spread were transported through the proposed beamline, which was optimized for 109 MeV protons. The protons emerged well-collimated with a significantly narrowed energy spread of 94.8±3.9 MeV (a reduction from the intended 109 MeV due to passage through the scatterer) and a homogenized, 11 mm diameter beam spot while maintaining a transmission efficiency above 2.2%. Published by the American Physical Society 2024

show abstract

Space–charge effect of laser accelerated protons on beam profile and permanent magnet quadrupole focal line

Cited by 3 publications

References 28 publications

Optimization of a therapeutic laser accelerated proton beam at 94.8 MeV for Stereotactic Radiosurgery

Optimization of a therapeutic laser accelerated proton beam at 94.8 MeV for Stereotactic Radiosurgery

Laser-plasma accelerated proton beam transport system using high-field pulsed solenoid magnet

Laser-driven acceleration of a 94.8 MeV uniform proton beam enhanced by a thin axial absorber rod

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