Acceleration of proton bunches by petawatt chirped radially polarized laser pulses

Li, Jianxing; Salamin, Yousef I.; Galow, Benjamin J.; Keitel, Christoph H.

doi:10.1103/physreva.85.063832

Cited by 37 publications

(9 citation statements)

References 68 publications

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“…In the past decades, as a typical kind of cylindrical vector beam with spatially non-unifrom state of polarization [1], radially polarized beam has been studied extensively in both theory and experiment due to its interesting and unique focusing properties, and has been found wide applications in microscopy, lithography, free space optical communications, electron acceleration, proton acceleration, particle trapping, material processing, optical data storage, high-resolution metrology, super-resolution imaging, plasmonic focusing, and laser machining [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Different methods have been developed to generate radially polarized beam [1].…”

Section: Introductionmentioning

confidence: 99%

Coherence and polarization properties of a radially polarized beam with variable spatial coherence

Wang

Cai

2012

Opt. Express

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In a recent publication [Appl. Phys. Lett, 100, 051108 (2012)], a radially polarized (RP) beam with variable spatial coherence (i.e., partially coherent RP beam) was generated experimentally. In this paper, we derive the realizability conditions for a partially coherent RP beam, and we carry out theoretical and experimental study of the coherence and polarization properties of a partially coherent RP beam. It is found that after passing through a thin lens, both the degree of coherence and the degree of polarization of a partially coherent RP beam varies on propagation, while the state of polarization of the completely polarized part of such beam remains invariant. The variations of the degree of coherence and the degree of polarization depend closely on the initial spatial coherence. Our experimental results agree well with the theoretical predictions.

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Section: Introductionmentioning

confidence: 99%

Coherence and polarization properties of a radially polarized beam with variable spatial coherence

Wang

Cai

2012

Opt. Express

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“…2012) and proton/ion (Salamin 2010 a ; Li et al. 2012; Ghotra & Kant 2015) acceleration. Let us define the laser propagation direction to be along .…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray flash in the interaction of a tightly focused single-cycle ultra-intense laser pulse with a solid target

et al. 2022

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We employ the $\lambda ^{3}$ regime where a near-single-cycle laser pulse is tightly focused, thus providing the highest possible intensity for the minimal energy at a certain laser power. The quantum electrodynamics processes in the course of the interaction of an ultra-intense laser with a solid target are studied via three-dimensional particle-in-cell simulations, revealing the generation of copious $\gamma$ -photons and electron–positron pairs. A parametric study of the laser polarisation, target thickness and electron number density shows that a radially polarised laser provides the optimal regime for $\gamma$ -photon generation. By varying the laser power in the range of 1 to 300 PW we find the scaling of the laser to $\gamma$ -photon energy conversion efficiency. The laser-generated $\gamma$ -photon interaction with a high- $Z$ target is further studied using Monte Carlo simulations revealing further electron–positron pair generation and radioactive nuclide creation.

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“…We are going to demonstrate that the changes of the reflectivity can be counteracted by a complicated frequency chirp of the driving laser pulse and derive a closed analytical form of the laser's required frequency dependence. We note that the problem of the laser chirp influence on the ion acceleration was addressed in a number of papers [50][51][52][53] , however a systematic analytical treatment of this problem in the case of a thin foil RPA was missing.…”

Section: Introductionmentioning

confidence: 99%

Tailored laser pulse chirp to maintain optimum radiation pressure acceleration of ions

Mackenroth

Bulanov

2019

Physics of Plasmas

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Ion beams generated with ultra-intense lasers-plasma accelerators hold promises to provide compact and affordable beams of relativistic ions. One of the most efficient acceleration setups was demonstrated to be direct acceleration by the laser's radiation pressure. Due to plasma instabilities developing in the ultra-thin foils required for radiation pressure acceleration, however, it is challenging to maintain stable acceleration over long distances. Recent studies demonstrated, on the other hand, that specially tailored laser pulses can shorten the required acceleration distance suppressing the onset of plasma instabilities. Here we extend the concept of specific laser pulse shapes to the experimentally accessible parameter of a frequency chirp. We present a novel analysis of how a laser pulse chirp may be used to drive a foil target constantly maintaining optimal radiation pressure acceleration conditions for in dependence on the target's areal density and the laser's local field strength. Our results indicate that an appropriately frequency chirped laser pulse yields a significantly enhanced acceleration to higher energies and over longer distances suppressing the onset of plasma instabilities.

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Acceleration of proton bunches by petawatt chirped radially polarized laser pulses

Cited by 37 publications

References 68 publications

Coherence and polarization properties of a radially polarized beam with variable spatial coherence

Coherence and polarization properties of a radially polarized beam with variable spatial coherence

Gamma-ray flash in the interaction of a tightly focused single-cycle ultra-intense laser pulse with a solid target

Tailored laser pulse chirp to maintain optimum radiation pressure acceleration of ions

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