Laser acceleration of protons using multi-ion plasma gaseous targets

Liu, Tung Chang; Shao, Xi; Liu, Chuan Sheng; Eliasson, Bengt; Hill, W. T.; Wang, Jyhpyng; Chen, Shih Hung

doi:10.1088/1367-2630/17/2/023018

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…In experiments, it is difficult to prepare pure single-ion targets and usually multi-ion targets are employed, such as hydrocarbon targets. In experiments and simulations of tabletop proton acceleration, femtosecond lasers and solid hydrocarbon (CH) targets are often invoked [20,[35][36][37][38][39][40][41][42]. The target's massive carbon ions (here C 6+ ) can strongly affect the charge-separation field and the hot-electron dynamics: they can stabilize the RPA process and enhance the resulting proton energy [35,[38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…In experiments and simulations of tabletop proton acceleration, femtosecond lasers and solid hydrocarbon (CH) targets are often invoked [20,[35][36][37][38][39][40][41][42]. The target's massive carbon ions (here C 6+ ) can strongly affect the charge-separation field and the hot-electron dynamics: they can stabilize the RPA process and enhance the resulting proton energy [35,[38][39][40]. In fact, proton beams with a higher cutoff energy but a broader spectrum are produced [20,35,38,40].…”

Section: Introductionmentioning

confidence: 99%

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Proton acceleration from picosecond-laser interaction with a hydrocarbon target

Yang

Huang

Jiang

et al. 2023

Plasma Sci. Technol.

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As intense picosecond laser pulse irradiates a hydrocarbon target, the protons therein can be accelerated by the radiation pressure as well as the sheath field behind the target. We investigate the effect of the laser and hydrocarbon target parameters on proton acceleration with two/three-dimensional particle-in-cell simulations. It is found that the resulting two-ion species plasma can generate a multiple peaked charge-separation field for accelerating the protons. In particular, smaller carbon-tohydrogen ratio, as well as thinner and/or lower-density of the target, leads to larger sheath field and thus proton beams with larger cutoff energy and smoother energy spectrum. These results may be useful for achieving high-flux quasi-monoenergetic proton beams by properly designing the hydrocarbon target.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Proton acceleration from picosecond-laser interaction with a hydrocarbon target

Yang

Huang

Jiang

et al. 2023

Plasma Sci. Technol.

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“…Developing suitable techniques is a long-standing desire of the laser community at large. A host of other studies from generating secondary sources [12] to high-energy density physics [13][14][15] to medical applications [16][17][18][19][20][21] also would benefit from better knowledge of the intensity.…”

Section: Introductionmentioning

confidence: 99%

Towards an in situ, full-power gauge of the focal-volume intensity of petawatt-class lasers

Longman

Pérez-Hernández

et al. 2019

Opt. Express

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About 50 years ago, Sarachick and Schappert [Phys. Rev. D. 1, 2738-2752(1970] showed that relativistic Thomson scattering leads to wavelength shifts that are proportional to the laser intensity. About 28 years later Chen et al. [Nature 396, 653-655 (1998)] used these shifts to estimate their laser intensity near 10 18 W/cm 2 . More recently there have been several theoretical studies aimed at exploiting nonlinear Thomson scattering as a tool for direct measurement of intensities well into the relativistic regime. We present the first quantitative study of this approach for intensities between 10 18 and 10 19 W/cm 2 . We show that the spectral shifts are in reasonable agreement with estimates of the peak intensity extracted from images of the focal area obtained at reduced power. Finally, we discuss the viability of the approach, its range of usefulness and how it might be extended to gauge intensities well in excess of 10 19 W/cm 2 .

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Proton focusing driven by laser triggered Coulomb explosion

et al. 2017

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A mechanism of the acceleration and focusing of quasi-monoenergetic proton beams from a thin arched carbon-hydrogen target irradiated by a relativistic-intensity laser pulse is investigated by multi-dimensional particle-in-cell (PIC) simulations. As an intense linearly polarized laser pulse impinges on the thin target, a considerable number of electrons are evacuated, leading to Coulomb explosion in the excess positive charges left behind. Accompanying with the acceleration, the protons are focused ballistically in the Coulomb field, which is mainly contributed by the carbon ions. It is demonstrated that a quasi-monoenergetic proton bunch with the energy-density as high as 1017 J/m3 is produced by using a laser pulse with the intensity of 1021 W/cm2. An analytical model is proposed to predict the proton energy and the focal position, which is fairly consistent with PIC simulations.

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Laser acceleration of protons using multi-ion plasma gaseous targets

Cited by 7 publications

References 40 publications

Proton acceleration from picosecond-laser interaction with a hydrocarbon target

Proton acceleration from picosecond-laser interaction with a hydrocarbon target

Towards an in situ, full-power gauge of the focal-volume intensity of petawatt-class lasers

Proton focusing driven by laser triggered Coulomb explosion

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