Sub-TeV proton beam generation by ultra-intense laser irradiation of foil-and-gas target

Zheng, Fanglan; Wang, H. Y.; Yan, Xiumin; Tajima, T.; Yu, M. Y.; He, X. T.

doi:10.1063/1.3684658

Cited by 28 publications

(15 citation statements)

References 32 publications

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“…In conjunction with the crystal cavities designed for the XFELO, such table-top devices have the potential to become a key tool for the release on demand of energy stored in nuclei at large ion accelerator facilities. Alternatively, the exciting forecast of compact shaped-foil-target ion accelerators [54,55], foil-and-gas target [56] and radiation pressure acceleration [57][58][59][60][61] together with microlens beam focusing [62] are likely to provide a viable table-top solution to be used together with the existing large-scale XFELs. A further study of the overlap efficiency for the laser beams and ion bunches shows that the copropagating laser beams setup is more advantageous.…”

Section: Experimental Facilitiesmentioning

confidence: 99%

Three-beam setup for coherently controlling nuclear-state population

2013

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The controlled transfer of nuclear state population using two x-ray laser pulses is investigated theoretically. The laser pulses drive two nuclear transitions in a nuclear three-level system facilitating coherent population transfer via the quantum optics technique of stimulated Raman adiabatic passage. To overcome present limitations of the x-ray laser frequency, we envisage accelerated nuclei interacting with two copropagating or crossed x-ray laser pulses in a three-beam setup. We present a systematic study of this setup providing both pulse temporal sequence and laser pulse intensity for optimized control of the nuclear state population. The tolerance for geometrical parameters such as laser beam divergence of the three-beam setup as well as for the velocity spread of the nuclear beam are studied and a two-photon resonance condition to account for experimental uncertainties is deduced. This additional condition gives a less strict requirement for the experimental implementation of the three-beam setup. Present experimental state of the art and future prospects are discussed.

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Section: Experimental Facilitiesmentioning

confidence: 99%

Three-beam setup for coherently controlling nuclear-state population

2013

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“…[14][15][16] However, because of transverse instabilities and hole-boring by the laser pulse, [14][15][16][17] the acceleration length is rather limited and it is difficult to enhance proton energy without still higher laser intensity. Recently, it has been shown that tens GeV proton beams 18,19 can be obtained by sequential radiation pressure and bubble acceleration or a moving double-layer, or in a two-phase acceleration regime 20,21 by ultra-relativistic lasers. However, in classical RPA and laser wakefield acceleration (LWFA), 22 the accelerated ion bunch tends to diverge because of the ubiquitous intense space-charge field.…”

Section: Introductionmentioning

confidence: 99%

Laser-driven collimated tens-GeV monoenergetic protons from mass-limited target plus preformed channel

Zheng

et al. 2013

Physics of Plasmas

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Proton acceleration by ultra-intense laser pulse irradiating a target with cross-section smaller than the laser spot size and connected to a parabolic density channel is investigated. The target splits the laser into two parallel propagating parts, which snowplow the back-side plasma electrons along their paths, creating two adjacent parallel wakes and an intense return current in the gap between them. The radiation-pressure pre-accelerated target protons trapped in the wake fields now undergo acceleration as well as collimation by the quasistatic wake electrostatic and magnetic fields. Particle-in-cell simulations show that stable long-distance acceleration can be realized, and a 30 fs monoenergetic ion beam of >10 GeV peak energy and <2 divergence can be produced by a circularly polarized laser pulse at an intensity of about 10 22 W/cm 2 . V C 2013 American Institute of Physics. [http://dx

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“…To overcome the problem of large energy spread, several methods, including tailoring the target shape, changing the ion species, multi stage acceleration, have been presented. One of the ways for improving the proton quality is the micro-structured double-layer (DL) target scheme which was proposed by Esirkepov et al [27] and has been widely investigated in both theory and experiment [28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Control of laser absorbing efficiency and proton quality by a specific double target

et al. 2016

New J. Phys.

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The micro-structured double-layer target is an efficient method to improve proton quality. However, the laser absorption efficiency is low due to strong reflection at the front surface of such targets. Moreover, the proton charge is limited by the driving laser radius. To overcome these shortcomings, a specific double-layer (SDL) target with a vacuum gap in the center of the heavy ion layer is proposed in this paper. In this specified target, the laser reflection effect is significantly weakened and the absorption and penetration efficiencies are greatly enhanced. The high-energy electrons from Breakout afterburner regime efficiently transfer their energy to the protons. Both the energy of the spectral peaks and maximum proton energy are greatly increased. The periodic structure of the longitudinal electric field makes the force applied on the protons becomes homogeneous in time average and therefore reduce the energy spread. In these SDL targets, the proton layer radius and the accelerated proton charge are not limited by the laser radius. With a larger-radius proton layer, the protons can be accelerated to high energy with small energy spread. When the proton layer radius is reduced to the laser radius, the SDL target is still an effective structure to improve the proton quality. The mechanism is proved by a series of particle-in-cell simulations.

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Sub-TeV proton beam generation by ultra-intense laser irradiation of foil-and-gas target

Cited by 28 publications

References 32 publications

Three-beam setup for coherently controlling nuclear-state population

Three-beam setup for coherently controlling nuclear-state population

Laser-driven collimated tens-GeV monoenergetic protons from mass-limited target plus preformed channel

Control of laser absorbing efficiency and proton quality by a specific double target

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